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Spring 2011 - Presentations
Check this page periodically to learn about the Presentations scheduled for the Spring meeting.
Please Note: This is a only a listing of the presentations and
UNLESS NOTED, DOES NOT IMPLY THE ORDER IN WHICH THEY WILL BE PRESENTED.
- Mini-Expo Vendors
- AP Sensing - AP Sensing will be showing their Linear Power Series which offers: • Real Time Distributed Temperature Monitoring of High Voltage Transmission & Distribution Lines • Asset Visualization • Hot Spot Detection • Dynamic Cable Rating / Real Time Thermal Rating • Emergency Rating • Reporting & Analysis
Distributed temperature monitoring provides continuous monitoring of high power cable temperatures, detecting hot spots, delivering operational status, condition assessment and power circuit rating data. This helps operators optimize their transmission facilities and distribution networks, reducing operating costs and improving asset utilization. http://www.apsensing.com
- China National
- Cooper Power Systems
- East Jordan Iron Works
- G&W Electric Company G&W Electric has been a global leader in providing innovative solutions to the electric power industry since 1905. Our product offerings include cable terminations, cable joints, load and fault interrupting switchgear, automatic circuit reclosers, SCADA and distribution automation products and high current limiting system protection devices. Stop by the mini expo to see our new line of PYTHON™ cable accessories featuring the mechanical shrink installation method. For more information visit www.gwelec.com.
- HIGHVOLT - HIGHVOLT produces high voltage AC, DC and Impulse Test Systems and specializes in Test Equipment for Power Transformers, Cables and all Electrical Apparatus with the highest levels of customer support and engineering excellence. Table Top presentations will include Cable Test solutions for Field and Factory High Voltage testing including details on Mobile High Voltage Resonant Test systems for HV Cables.
- Kinectrics "Kinectrics’ established industry experts provide clients worldwide with comprehensive engineering and testing services for Transmission and Distribution Technologies (TDT). Our proven expertise includes qualification and maintenance testing (AC Hi-Pot and Partial Discharge) for underground cables. Kinectrics’ has two high-power Mobile Resonant Test Systems for HV transmission cable withstand AC Hi-Pot Testing. Kinectrics also offers leading-edge capabilities for underground cable leak location and “one-stop” High Voltage / High Current lab facilities. Kinectrics’ specialists in generation, transmission, distribution, and environmental technologies use innovative science and engineering to help clients improve business performance. We offer life cycle management solutions in a broad range of technical disciplines across the energy sector. www.kinectrics.com"
- LS Cable America Inc.
- The Mears Group Specializing in Horizontal Directional Drilling Services: One of the largest horizontal directional drilling contractors in the world with a fleet of 28 small, mid-size & large drilling rigs with up to 1,100,000 lbs. of pullback that can install pipe up to 60 inches in diameter and up to 8,000 feet in length. For more information on our services, please call: U.S. (800) 632-7727, Canada (780) 955-7155 or visit www.mears.net.
- OMICRON Electronics Corp USA is an international company serving the electrical power industry with innovative testing and diagnostic solutions. With customers in more than 130 countries, OMICRON products provide users with the highest level of confidence in the condition assessment of primary and secondary equipment on their systems. Products include: Test Instruments for Protective Relays, CT's, Power Transformers, & all Substation Apparatus. Specialized tests include Sweep Frequency Response Analysis (SFRA), Dielectric Frequency Response (DFR) & Partial Discharge (PD). Visit www.omicronusa.com
- Roy Alexander
- UtilX Corp "UtilX® Corporation, the global leader in life-extension technologies, provides proprietary CableCURE® cable rejuvenation, along with CableWISE® system-wide condition assessment, including cable testing, and has restored more than 80 million feet of unreliable power cable. www.utilx.com."
- W.A. Chester, L.L.C. is the industry-leading electrical contractor for the installation, maintenance and repair of underground high voltage pipe-type and solid dielectric cable transmission and distribution systems. Founded in the 1930’s, our clients include electric utility companies and independent power producers in the United States and Canada and we are one of three specialty contractors performing this type of work on a national basis. In addition to underground systems, W.A. Chester, L.L.C. has expanded its services to include installation, maintenance and repair of overhead electric distribution cable systems. For more information, please visit our website at www.wachester.com.
- Wasson-ECE - Wasson-ECE provides a Tracer Analyzer for the detection of leaks in high voltage cables. The Tracer Analyzer detects perfluorocarbon tracers (PFTs) in air from tagged feeder oil leaks and greatly improves leak detection efficiency, eliminating the need for freeze and pressure testing techniques and cable de-energization. The analyzer is designed for a mobile environment with fully automated sampling and global positioning system (GPS) tracking. Our system has been successfully used domestically and internationally and has drastically reduced the time and cost involved in detecting leaks. For more information please contact us: firstname.lastname@example.org.
Subcommittee A - Cable Construction and Design - Tuesday, May 24, 2011, 8:00 AM - 12:00 PM
- 8:00 – 8:15 AM - Subcommittee Business/Announcements
- 8:15 - 8:40 AM “Verification of Low-Voltage Underground Cable Insulation Integrity by Air Injection”, J. Tarnowski, J. Côté, A. Gaudreau, P. Gingras, M. Iordanescu - Hydro-Québec-Canada
Abstract: An arc fault on low-voltage (LV) cables in an underground duct may have adverse consequences, as the gases generated by the degradation of materials near the fault may cause violent explosions. At Hydro-Québec the main origin of the phenomenon is most likely a break in the insulation which can occur during handling and/or installation of cables. Hydro-Quebec developed new testing technology and equipment for the detection of insulation leaks in newly installed secondary cables. More specifically, the new verification method consists of injecting pressurized air into the cable core and then monitoring pressure variations within the cable. Prototypes were successfully tested on Hydro-Québec’s underground distribution system. Field test results will be summarized in the presentation. The new instrument will be used for quality control of newly installed cables and for fault prevention, including arcing faults.
- 8:40 – 9:05 AM “Improving and Controlling the Surface smoothness of Semiconductive Shields”, Laurent Gervat, Sébastien Quinebeche - Arkema, France, Oliver Hissmann - OCS, Germany
Abstract: A first study presented last year has shown that the use of a particular blend of ethylene copolymers improves the surface smoothness of a semiconductive composition for medium and high voltage conductor shields. A new set of experiments using several other types of carbon blacks show that improvements are more significant using specialty blacks versus general purpose grades. It suggests a dual effect of the copolymer blend: a processing and a dispersing one. The study also focuses on the electrical stress enhancement induced by each protrusion. Data from a new software version of the nip detection system allows the effect to be quantified. Applied to medium and high voltage cable geometries, the calculation gives guidance towards acceptable limits for surface smoothness and how to measure it.
- 9:05 – 9:30 AM “Temporary Site Cables - The Flexibility to Act More Quickly”, Matthias Kirchner - Nexans Deutschland GmbH
Abstract: Temporary site cables are energy cables used to temporarily connect equipment in a high-voltage network, e.g. as a bypass during construction or repair and servicing work. This type of cable is available up to Um= 245 kV. Depending on the needed ampacity, different cross sections are possible. Temporary site cables have the same design as high-voltage cables but with a reduced insulation thickness. This makes them easier to handle on the construction site. The conditions under which temporary site cables are used give special requirements to the accessories: they must be easy to use and shall have a wide range of possible applications. Flexible silicone rubber outdoor terminations facilitate use in any position. Thanks to their low weight, the terminations can be operated without an additional support structure. Dry type GIS terminations are also available. Special single or three-chamber drums make transportation to the construction site as well as handling on the construction site easier. The special drum design facilitates safe winding and unwinding of the cable and installed flexible silicone rubber terminations. Depending on customer requirements the length can vary between 50 and 500m. rapidly. If faults occur in overhead lines or cables laid in the ground, temporary site cables make it possible to restore energy transmission rapidly. About possible opportunity to use temporary site cables in emergency case will be reported.
- 9:30- 9:55 AM "Polyethylene Based Jacketing for Power Cables", William Fajardo – Borealis.
Abstract: Jacketing for power cables has developed over the years as new requirements emerged from new standards. Polyethylene based materials, mainly LLDPE, are currently the jacket material of choice for North American MV primary distribution cables. Its good physical properties and relative cost are key factors. Bimodal polyethylene is the next step for polyethylene jacketing grades. Bimodal PE can provide excellent processing while increasing performance properties. New areas for jacketing include flame retardants and crosslinked materials. Information on bimodal grades and their performance will be reviewed in this paper.
- Break – 9:55– 10:25 AM
- 10:25 -10:50 AM "Failure Mechanism of Medium Voltage Rubber Insulated Cable After About 30 Years of Wet Service", Bogdan Fryszczyn – Cable Technology Laboratories, Inc.
Abstract: EPR insulated medium voltage cables, operating in a wet environment, have failed much less frequently than XLPE insulated cables of similar age. Recent laboratory testing and analysis of longer lengths of various EPR and butyl rubber insulated 5 kV and 15 kV cables, operating in a wet environment for about 30 years, show that the reason for the cable failures are infrequent, but large water trees. This contradicts earlier studies published in 1996 that concluded that water trees are not the reason for failure of EPR insulation.
- 10:50 -11:15 AM “Buried Cable Performance in the 2010 and 2011 New Zealand Earthquakes”, John Eidinger -G&E Engineering Systems
Abstract: The two recent earthquakes in Christchurch New Zealand led to ground failures due to liquefaction. About 100,000 customers have had power service lost due to buried cable failures. Most of the power distribution system uses below ground 66 kV and 11 kV cables. This presentation will highlight failures to oil-pressure filled 66 kV cables and XLPE 66 kV cables, with emphasis on the ground failures and consideration of how the thermal backfill contributed to these failures. Repair efforts for this type of damage are costly and lengthy to implement, leading to long term power outages, loss of N-1 protection for many months, and inability to meet peak loads.
- 11:15 -11:40 AM “The Effect of Contaminants on Aging of TR-XLPE Insulated Cables: An Evaluation on Commercially Produced 15 kV Cables”, George Valdes – Florida Power and Light, Bill Temple, John Smith – General Cable, Paul Cinquemani, Pat Coplen – Prysmian Power Cables, Paul Caronia, Al Mendelsohn – Consulant
Abstract: In 2001, Florida Power & Light (FP&L) initiated a project to quantify the levels of contamination in the cables they purchase. A six-month pilot was designed, together with two cable manufacturers, to install the same model pellet sorters on one of their respective extrusion lines used to produce cables for FP&L and to fully characterize the material rejected by the pellet sorters over this period. The pellet sorter pilot studies highlighted the presence of unexpected numbers of rejects in the pellet stream of the TR-XLPE insulation used to manufacture cables. The vast majority of particles were loose dark flakes of various sizes, determined to be degraded compound. In order to understand what effect these types of rejects or “contaminants” might have on the cable aging performance, General Cable, Prysmian Power Cables, and The Dow Chemical Company agreed to participate in a joint project with FP&L. A plan was developed to select some typical “contaminants” based on the findings of the pellet sorter pilot studies and to make commercial cables with lab prepared contaminant particles representative of those found in the pilot. An accelerated cable aging protocol for testing the effect of these particles was also proposed, which after discussions with the ICEA and AEIC groups evolved to using both the ACLT time-to-failure test in tanks as well as the standard ICEA AWTT 1-year cable qualification test. This presentation will discuss the history and objective of the project in more detail and describe very briefly the cable manufacturing and accelerated aging tests utilized in the project. Subsequent presentations will summarize: (a) the technology to produce commercial cables with uniformly distributed contaminants and tests conducted to validate the suitability of the method, (b) the effect of preconditioning method on initial HVTT results, and (c) the key data and findings from the various cable aging tests, as well as recommendations for future studies.
Subcommittee B - Accessories - Tuesday, May 24, 2011, 2:00 - 5:00 PM
- 2:00-2:15 PM – Introduction/Announcements, Harry Yaworski, TE Connectivity – chair
- 2:15-2:45 - “IEEE 592 Standard for Exposed Semiconducting Shields", Thomas Champion, NEETRAC—A Center of Georgia Tech
Abstract: The IEEE 592 standard was written many years ago when the semiconductive shields of cables and joints were exposed. Most cable are now jacketed, which means that jackets are now applied over joints and portions of elbows. The effect of a jacket on the performance of semiconductive shielding systems has never been evaluated, although most installations now use jacketed constructions. Tom Champion received his BSEE from the Georgia Institute of Technology in 1977. He worked with Georgia Power Company for 25 years in various departments before joining NEETRAC, A Center of the Georgia Institute of Technology, as a Research Engineer in 1996. Tom has been extensively involved in forensics and issues associated with both underground and overhead distribution and transmission systems, doing work on the partial vacuum induced flashover problem with separable connectors, with dissimilar metals corrosion issues, and with switching and fault close operations. Tom has served as Chairman of ICC working groups on Revision of IEEE 386 and Failure Analysis, served as Chair and Vice-chair of Subcommittee B on Cable Accessories, and is currently ICC Vice-chair Treasure Elect.
- 2:45-3:15 - “Medium Voltage Insulated Connector Testing”, Richard Heavner & Sherif Kamel—TE Connectivity
Abstract: Connectors for medium voltage insulated cables are currently selected based on conformance to ANSI C119.4 which is a specificaton for bare overhead conductors. Issues with connectors overheating during IEEE 404 load cycle testing have prompted further testing and evaluation. Significant differences exist between the test conditions of ANSI C119.4 and IEEE 404. Qualification of a connector to ANSI C119 does not guarantee performance to the requirements of IEEE 404. Test results and a proposal for new medium voltage insulated connector test is discussed. Richard Heavner received received his Master of Science Degree in Mechanical Engineering from North Carolina State University in 1988. He has been employed at TE Connectivity in North Carolina as a Product Development Engineer for the past 3 years, working primarily on connector design and testing for low and medium voltage application. He has actively participated in the ANSI C119 Subcommittee during this tenure. Sherif Kamel earned his B.Sc., M.Sc. and Ph.D. degrees in Electrical Engineering. He has thirty years of experience in the electrical engineering domain, both in the university and the industry. Mr. Kamel’s interests include breakdown phenomena in gas, liquid and solid insulation systems, transmission and distribution cable accessories, insulators and, surge arresters. He joined TE Connectivity in 1997 where he held several positions in R&D and Product Management.
- 3:15-3:30 - Break
- 3:30-4:00 “The Chemistry of Interfacial Tracking”, Dominique Bolliger , Electrical Insulation Research Center— University of Connecticut
Abstract: Interfacial tracking is a common phenomenon that occurs in a wide range of high voltage apparatus and frequently leads to electrical breakdown. A review of the chemistry of surface tracking on crosslinked polyethylene (XLPE), ethylene-propylene rubber (EPR) cable compound, and silicone rubber (SR) is given, from which chemical reactions are proposed that can occur in the commonly encountered interfaces of XLPE/EPR, XLPE/SR, EPR/EPR, and EPR/SR. Tracking tests were conducted, and the tracking products were analyzed using FTIR and GC/MS. XLPE and EPR showed carbonization and an increase in cyclic and smaller chain hydrocarbons produced from radicals originating from hydrogen abstraction and chain scission. Oxidation of XLPE was observed, and evidence of a Norrish type II photochemical reaction was found. SR showed evidence of the production of SiO2 and lower molecular weight silicones, and tracking was achieved through erosion of the polymer. Dominique Bolliger (IEEE Student Member) received his B.S. degree in Chemistry from the University of Basel, Switzerland in 2008. He is with the Electrical Insulation Research Center, Institute of Materials Science at the University of Connecticut, USA for his Ph.D. degree in Materials Science.
- 4:00-4:30 PM - "Update on revisions to IEEE-48 standard and P1637, Termination Selection Guide", Bill Taylor—3M
Abstract: We will address the harmonization of IEEE-48 and IEEE-404, as well as other revisions being considered to the IEEE-48 standard. There is also an application guide section in IEEE- 48 and this is planned to be removed and included in the P1637 guide. The guide will then become an application and selection guide. Many other topics are planned to be added to the guide and these will also be discussed. Bill Taylor graduated from the University of Texas at Austin in 1975 with a BSEE degree. He spent 14 years as a plant electrical engineer for several petrochemical plants on the Houston ship channel. Went to work for 3M in 1989 as a product development engineer in the cable accessories area, and continues in that capacity at the present time. He is a member of IEEE/IAS and PCIC, IEEE/PES and active in the ICC. Vice chairman of the ICC in 2002 & 2003 and chairman in 2004 and 2005. He has written and presented numerous papers for IEEE and other conferences.
- 4:30-5:00 PM - Closing remarks, Q&A
- Subcommittee C - Cable Systems - Monday, May 23rd, 2011, 9:15 AM - 12:30 PM
- 9:15 -9:30AM - Chairman’s Opening Remarks and Announcements
- 9:30 – 10:00 AM –
CIGRE WG B1-25 "Advanced design of metal laminated coverings” the final brochure, by Pierre Mirebeau, Nexans (France)
Due to environmental restrictions, advanced laminate coverings are now preferred to lead sheath to cover High Voltage extruded cables. The WG B1-25 has taken profit of an operation survey in 13 countries to establish a recommendation for tests and a guide to use these advanced laminate coverings, where several layers of plain (not corrugated) metal and plastic materials are bonded together to get a special set of properties. It replaces Electra 141 (1992).
- 10:00 – 10:30 AM – “HVDC cable systems with particular reference to terrestrial applications”, by Ernesto Zaccone, Prysmian (Italy)
The Increase of need for energy exchange across countries and the imperative mandate of the best exploitation of the available power resources, require a strong implementation of the transmission grids. Connection of remote generation plants to large consumption centers, has been facilitate by the realization of long HVDC links associated with latest developments in converters' technology. The consequence is a boost in the use of HVDC underground and submarine cables. So far, cables have been used for submarine applications while the tendency for land portions was to employ overhead lines. Recent technological developments in extruded DC cables increased also their use for land applications. Presentation will deal with technological aspects and will describe some projects currently under construction in Europe including Inelfe 320 kV (a full-land connection to transmit 2000 MW between Spain and France), Borwin2 300 kV (delivering 800 MW wind-generated power from 125 km offshore to 75 km inland), Skagerragk 4 a monopole 500 kV, 715 MW circuit connecting Denmark to Norway having 137 km submarine and 92+12 km of land cable being the latest one of the longest HVDC underground portion of the world.
- 10:30 – 11:00 AM
Update on Cigre WG B1.27 – “Recommendations for testing of long AC submarine cables for extruded insulation for system voltage above 30 (36) to 500 (550) kV” by Johan Karlstrand, ABB (Sweden)
After almost 4 years of time, the WG B1.27 will now finish their work on testing recommendations for ac extruded submarine cables (36 - 550 kV). The Electra 189 recommendation will be replaced by the coming issue of the new TB, but the scope is wider and take into account even EHV cables as well as a more stringent approach to production quality and assurance. Furthermore, PQ- testing has been included in the overall scope. A brief update of the work of the WG will be presented.
- 11:00 – 11:20 AM - Break. o 11:20 – 11:50 AM –
“Pacific Gas & Electric Company Downtown San Francisco 115kV Underground Transmission Re-Cable Project A Unique Application of Existing Technology” by John Rector, Black & Veatch Corporation, and Albert Kong, Pacific Gas and Electric Company
Pacific Gas & Electric Company recently completed a re-cabling project on its 115kV High Pressure Gas Pipe Type Cable. Two existing technologies were used. A LPP insulated cable was used in an existing HPGF pipe. The presentation discusses the project and construction challenges. The project challenges ranged from working in congested areas to pulling out existing 60 year old cables. The construction challenges were in installation and included excavation where required.
- 11:50 – 12:20 AM –
“Pipe Type Cables in the USA - an historical review” by Joe Zimnoch, Consultant
Pipe type cables were pioneered, developed and first introduced in the United States in the early 1930’s and gained rapid acceptance as an excellent reliable system for the underground transmission of bulk power at high voltages. Numerous circuits are in service at many utilities totaling thousands of conductor miles at all voltage levels from 69 kv though 345 kv. This presentation will trace the history of these widely used cables and the manufacturers who produced them. The developments and changes in the cables and industry specifications over the years leading to progressively higher voltage levels and even further enhanced performance will also be covered. Information will also be provided on industry references containing both cable and system details on many of the earlier installations, along with some details on the longest pipe type cable pulls ever made.
- 12:20 – 12:30 PM - Vice Chair’s Closing Remarks.
Subcommittee D - Generating Station Cables, Wednesday, May 25, 2011, 8:00 AM - 12:00 PM
- 8:00 -8:15AM -
Chairman’s Opening Remarks and Announcements
8:15 - 9:00 AM - Earthquake, Tsunami and Accident at Fukushima Daiichi Nuclear Plant, Kent W. Brown, TVA
Abstract: This presentation will provide a brief overview of the recent events in Japan. Based on best available data, the sequence of events leading to the loss of coolant at the Fukushima Daiichi plant will be discussed. Differences in US and international practice will be discussed and the initial set of lessons learned will be reviewed.
9:00 – 9:30 “Bioplasticized PVC for Wire and Cable Applications”, Bret Neese, Bharat I. Chaudhary, Robert Eaton, A. Ghosh-Dastidar, Wire and Cable R&D, The Dow Chemical Company. Abstract- Flexible PVC compounds are widely used to make the jackets and insulations of various wire and cable constructions. The incumbent PVC compounds are made using petroleum-derived plasticizers such as phthalates, trimellitates and mixtures thereof. Recently, bio-based plasticizers derived from renewable resources have been introduced to the market which, when substituted for the conventional plasticizers, can enable cable-makers and original equipment manufacturers to significantly reduce greenhouse gas emissions and eliminate the use of phthalates in their systems. This presentation will describe the characteristics of these bioplasticizers, as well as the properties of representative jacket and insulation compositions made with these bioplasticizers. The critical product properties will be compared with those obtained with traditional petroleum-derived plasticizers.
10:00 – 10:15 Break
- 10:15 – 10:45 "Functionality Testing of Fire Rated Cables Used for Safe Shutdown Systems in Nuclear Power Plants “, Gabriel Taylor – Nuclear Regulatory Commission, Gil Shoshani – RSCC Wire and Cable LLC Abstract-The purpose of the presentation is to inform the Insulated Conductor Committee meeting participants about a proposed standard development related to fire resistance functionality testing of Fire Rated Cables for use at commercial nuclear power plants. The focus of the standard is to provide a recognized testing protocol for exposing energized electrical cable to a standard fire exposure for a desired time rating. The presentation will provide a brief summary of nuclear power plant fire risk, the critical role cables play in fire probabilistic risk assessment and a brief discussion of NRC regulatory requirements and guidance. This will be followed by a summary of the motivation for developing the new standard under the IEEE Insulated Conductor Committee for the commercial nuclear industry. Proposed testing methods and comparisons to similar testing standards will also be discussed.
10:45 – 11:15 "Submergence Testing of Cables For Use in Nuclear Facilities”, Doug Depriest, TVA, Robert Fleming, Kerite.
Abstract-The nuclear industry
regulator and other performance monitoring organizations have pushed for cable
aging management programs. These programs call for testing of underground,
medium voltage cables. Historically, when considering the varying types of
cables used in the nuclear industry, some types warrant this attention, while
others do not. This presentation will present a potential method for
distinguishing cable types suitable for a submergence rating, thereby obviating
the need for testing of cables that achieve a “submergence rating” when the
presence of water is the relevant adverse condition. This presentation
corresponds with the beginning of a discussion group on the same topic.
- 11:15 – 12:00 “Principles of Electrical Polymer Chemistry for Wire and Cable Applications”, Art Maldonado, AM Technology Group LLC Abstract- Electrical cables’ performance and life expectancy mostly depends on the polymer selection for insulation and jackets. Polymeric materials play a very vital role in the meeting the performance criteria of various types of industrial cables such as power, control, and instrumentation cables. Emphasis will be placed on the properties of the materials products that are critical for the performance of industrial cables, and on individual polymers, their advantages and drawbacks for specific product applications. Fire safety aspects and environment issues associated with the industrial cables will be discussed in this presentation. Cable aging and life expectancy studies will be reviewed. Concepts covered in this course will assist the attendees in understanding the complexities of materials selection process for Industrial cable applications including the cost/benefits of appropriate polymer selection. Art Maldonado is an IEEE Senior member and Vice Chair of Sub D with over 34 years of experience as a Polymer Chemistry/Fire Safety Engineering Consultant to the Wire and Cable Industry. Art holds a BSChE from the University of Puerto Rico and an MBA from the University of Delaware. Art is the CEO of AM Technology Group LLC and developed Uniroyal Chemical’s 1st medium-high voltage EPR. Art is the Chairman of WGs IEEE-1242 (Petrochemical Cables) and IEEE-P1717 (Testing Fire Protection Cables for Hydrocarbon Fires) and initiated IEEE P1810, “Guide for Installation of Fire-Rated Cables for Safety, and Emergency Shutdown Systems in Petroleum and Chemical Industries”.
Subcommittee F - Field Testing and Diagnostics - Monday, May 23, 2011, 2:00 - 5:30 PM
- 2:00 - 2:10 PM - Subcommittee & Working Group Business
- 2:10 - 2:35 PM - EVALUATION OF PD MEASUREMENTS ON MV CABLE SYSTEMS BY MEANS OF A WEB DATABASE by Frank Petzold SEBA kmt Germany
The use of onsite PD measuring systems is more and more common to detect and locate PD faults to prevent service failures and loss of power supply.
To perform a PD measurement is quite easy, but the interpretation of the results rises often more questions and makes the decision for replace or repair difficult.
The increasing number of joint failures prepared in the past 15 years was an initial point to establish in Germany a VDE-working group to collect and share experiences of onsite PD measurements.
More than 30 German utilities and several manufactures of pd measuring equipment are members of the working group.
The outcome of this work is a WEB database, to collect in a clear structure the most important pd parameter of field measurements and the results of visual inspections of the located pd faults.
The contribution describes the database in detail and presents that the evaluation of pd measurements and severity estimation of the specific pd fault has to be done under consideration of the type of accessory and also the nature of the defect.
Because the ignition of PD in a defect depends from the type of excitation voltage the database is structured accordingly.
The data collection in the database should be not limited on German utility and industry networks, but can be also used for worldwide input and use for interpretation of onsite pd measurements.
- 2:35 - 3:00 PM - Sensitivity of the Hot Oil Moisture Assessment for PILC Cables to Field Test Conditions Joshua Perkel NEETRAC
Although PILC cables are often regarded as a mature cable technology, they continue to represent a very significant proportion of the installed and network cable technologies. As a consequence most utilities need to maintain and support them. Most of the repair / replace decisions are determined by the level of moisture within the paper oil insulation system as this drives many of the degradation mechanisms. The most common approach is the “hot oil test”; where samples of tapes are immersed in hot oil and the liberated moisture forms a “foam”. However some of the NEETRAC utility members were concerned that the results could be affected by test conditions (oil temperature, sample length and time of test) and inconsistencies in interpretation of the degree of foaming. As a consequence NEETRAC undertook a series of designed experiments using PILC cables returned from the field to determine the effect of the test factors.
This presentation will describe the methodology, document the significance and magnitude of the test parameters. The level of moisture within the tapes was correlated with the qualitative descriptions of foaming. Establishing critical levels for moisture content within PILC cables of different voltages is outside the scope of this presentation.
- 3:00 - 3:25 PM - Utility Experience With VLF Withstand And Dielectric Loss Tests In Cincinnati Chris Fletcher Duke Energy
Abstract: In 2005 Duke Energy began to investigate the potential benefits of cable diagnostic testing through participation in the Cable Diagnostic Focused Initiative (CDFI). Field testing in 2006 to the present, as part of the CDFI and by Duke personnel, has provided further evidence that cable system diagnostics could help the Company to improve service reliability and to maximize the value of cable system replacement budgets. The testing involved in these programs included Dielectric Loss, Monitored Withstand, Partial Discharge and Simple Withstand approaches.
Many positive results from these trials led Duke Energy to implement a medium voltage underground cable system diagnostic program in 2008. The program presently involves the use of Time Domain Reflectometry, Dissipation Factor (Tan Delta) Measurement, and Very Low Frequency Withstand. This program continues to demonstrate the value of cable system diagnostics by prioritizing cable replacements, identifying cable segments that do not need to be replaced, and identifying cable and cable accessories that were about to fail while in service.
The cable system diagnostic programs are underway in three different regions. This presentation will discuss some of the experience that the Duke Energy has gained with its cable system diagnostic program. The talk will also identify some of the benefits that have been received.
- 3:25 - 3:40 PM - Break
- 3:40 - 4:05 PM - ASSESSING THE INTEGRITY AND INCREASING THE SERVICE LIFE OF HPFF PIPE TYPE CABLES Hank Kleinfelder Mears Group, Quanta Integrity Solutions
Abstract: Electric utilities in the United States are currently utilizing over 4000 miles of high pressure fluid filled (HPFF) underground transmission lines. Most have been in service in excess of their 30 year design life with some being in service as long as 60 years. The systems have proven to be robust with very few problems and have required little or no maintenance. Over the years the pipe type cables have increased in their importance as part of the backbone of the transmission systems. As the systems continue to age new strategies need to be utilized to insure their ability to provide safe and reliable service. The following is a well established integrity program designed to assist asset managers properly maintain aging pipe type cables.
- 4:05 - 4:30 PM - APPLICATION OF DISSIPATION FACTOR MEASUREMENTS FOR LIFE CONSUMPTION AND FUTURE LIFE ESTIMATION MODELING OF OIL-IMPREGNATED PAPER INSULATION IN HV POWER CABLES by Ed Gulski, onsite.hv.solutions AG, Switzerland Lukasz Chmura, Huifei Jin, Delft University of Technology, The Netherlands Frank de Vries, Alliander, The Netherlands
This contribution gives the information about application of dielectric loss measurements for life consumption and future life estimation of oil-impregnated paper insulated cable. This is done by combination of laboratory experiment and on-site diagnostics. During laboratory experiment dielectric loss values were investigated at different temperatures and different electrical field intensities for samples characterized by different life consumption. Based on laboratory measurements, a program was built; it can calculate the life consumption of paper oil-impregnated insulation by on-site dielectric loss measurements. Future life estimation is calculated based on the result of life consumption and thermal aging theory in the program. Using field examples the of this method to qualify the degradation of oil-impregnated paper insulated cable, estimate the effect of operational history of the cable and support the future decisions of load profile and expected life of the cable will be discussed.
- 4:30 – 4:55 PM - DIAGNOSTIC OF INSULATION AGED IN DRY ENVIRONMENT by Bogdan Fryszczyn, CTL
Recently CTL analyzed two 5 kV shielded EPR (pink and black) insulated cables, removed from service after approximately 30 years. The cables were removed because they failed field-testing criteria. Both cables operated in a dry environment. Results of both field testing and laboratory testing will be discussed.
- 4:55 – 5:20 PM - Effect of Water Ingress on Dielectric Properties of Miniature Cables Made of Polyethylene Based Insulation with and without Electrical Stress by J-F. Drapeau and S. Bernier, IREQ
This presentation reports on dielectric loss and dielectric strength measurements carried out on miniature PE cables immersed in water without voltage (hydrated) and under 5 kVrms voltage (aged). The dielectric losses were primarily measured using Time Domain Spectroscopy (TDS), allowing to obtain loss values in polarization and in depolarization, and also using VLF Tan delta (sine wave). Then, ACBD tests were performed to assess the dielectric strength of the miniature cable samples under the conditions: new, “hydrated” and “aged”. Results from this study are presented and discussed in terms of their possible implications on dielectric loss diagnostic interpretation.
- Subcommitee G - Transnational Luncheon, Tuesday, May 24, 2011, 12:15 - 2:00 PM
- 1. Opening by Wim Boone
Calendar of international events, Wim Boone
Completion of large capacity 220 kV Submarine cable project in China, Shoji Mashio, Sumitomo Electric/J-Power Systems, Japan
A case of Superconductive cables, Pierre Mirebeau, Nexans Energy, France
Submarine cables for Offshore Wind Farms, Matthias Kirchner, Nexans, Germany
PQ test and practical installation for 400 kV XLPE cable, JY Woo, Taihan Electric USA
Advantage of modular test systems for HV-On site tests of cable systems, Claus Vaterrodt, IPH, Germany
Development of DC XLPE cable &accessories, by Hoiroshi Ninobe, VISCAS Corporation, Japan
News from Jicable, Ray Awad, Hydro Quebec, Canada
- Educational Program - “Diagnostic Testing Techniques (other than Historical PD Tests) for Distribution and Transmission Cables”, Wednesday, May 25, 2011, 1:00 - 5:00 PM
- 1.Fundamentals of the Different Techniques
- ·Voltage Sources (DAC & VLF), 15 min, H. Oetjen - HDW
- ·VLF Withstand, 15 min, B. Olson-HV Inc.
- ·DAC Diagnostics, 15 min, F. Petzold – SEBA kmt
- ·Dielectric Response Measurements, 15 min, J.F. Drapeau- IREQ (Hamon, Leakage, TDS)
- ·VLF TD & Monitored Withstand, 15 min, C. Goodwin-HV Diag.
- ·VLF PD, 15 min, L. Testa-TechImp
- 2.Experience with available techniques, 40 min, N. Hampton – NEETRAC
- 3.Panel Session with Q&A, 45 min, All presenters
NEW! 0.4 CEUs will be offered for this session. You must register in order to receive CEUs. (Please note, in order to receive these credits towards a Florida PE License, you MUST provide Thomas Arnold with your FL PE License number prior to the session.
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