NSC B1 Power Cables - Stichting CIGRE Nederland€¦ · B1.34 Mechanical forces in large cross...

Voorbereidingsdagen

15 en 16 augustus 2012

NSC B1 – Power Cables

Inhoud

• Activiteitenoverzicht SC/NSC B1

• Overzicht interessante papers

• Overzicht agenda Parijs

Overzicht NSC B1 – Power cables

Samenstelling NSC B1 Gert Aanhaanen TenneT

Dik van Houwelingen Stedin

Vacant (was: Cor de Jong ) Alliander

Edwin Pultrum (CAG contacts) DNV KEMA

Maarten van Riet Alliander

Jos van Rossum Prysmian

Fred Steennis (secretaris) DNV KEMA

Vacant (was: Auke Wiersma) Stedin

Frank de Wild (voorzitter) DNV KEMA

Vacant (was: Sander Meijer) TenneT

Piet Soepboer Enexis

Leo Boone Delta

Peter van Velzen Joulz

NC B1

5

• NC B1 komt 2 maal per jaar bijeen voor regulier overleg • Cigre activiteiten • Informatie uitwisseling over specifieke

onderwerpen / problemen • Thema sessies

• Current rating • Workmanship of jointers

• Daarnaast: - Email correspondentie en discussie - Speciale vergaderingen voor events

Nederlandse deelname in B1

Werkgroep / Taskforce Voorzitter Nederlands lid

CAG (Customer) E. Bergin X

TAG (Tutorial) J. Karlstrand X

SAG (Strategic) P. Argaut W.Boone

PAG (Prospective) M. Marelli X

JTF Cigre/ICC W. Zenger W. Boone

Kleurcode: Recent afgerond/ In afrondende fase, Actief



B1.11 Uprating and upgrading F. Lesur J. Pellis

B1.22 Cable accessory workmanship K. Leeburn H. Geene

B1.23 Impact of EMF on ratings and systems H. Orton J. Smit

B1.25 Adv. design of laminated metallic foils P. Mirebeau F. Middel

B1.27 Test recommendations for XLPE AC submarine cables from 170-500 kV

A. Gustaffson

R. Gruntjes

B1.28 On site PD assessment M. Fenger E. Pultrum




B1.29 Guidelinges for maintaining the integrity of XLPE trans. accessories

E. Bergin J. v. Rossum

B1.30 Cable system electrical characteristics C. Royer X

B1.31 Testing of superconducting cable systems (upto 170 kV)

D. Lindsay A. Geschiere

B1. 32 Recommendations for testing DC cable systems for power ransmissiong up to 500 kV

B. Sanden R. Bodega

B1/B3.33 Feasibility of a common, dry type interface for GIS and Power Cables of >52 kV

B. Sanden R. Bodega


Nederlandse deelname in B1 Werkgroep / Taskforce Voorzitter Nederlands

lid

B1.34 Mechanical forces in large cross section cable systems

J. Kaufmanns

R. v.d. Thillart

B1.35 Cable ratings F.H. de Wild J.v. Rossum

B1.36 (renewed) Life cycle assessment and environmental impact of UGC systems

R. Awad X

B1.37 Guide to continue operation of fluid filled cable systems

C. Peacock D. v. Houwelingen

B1.38 After laying test on AC and DC cable systems with new techniques

M. Fenger E. Pultrum

B1.39 On shore generation cable connections to grid

Y. Maugain X

B1.40 Off shore generation cable connections

C. Jensen Sander Meijer

Kleurcode: van TF naar WG, nieuwe TF, SC stelt voor aan NNC

Nederlandse deelname in B1 Werkgroep / Taskforce Voorzitter Nederlands

lid

B1.43 Recommendations for mechanical testing of submarine cables

M. Jeroense X

TF B1.41 Issues regarding soil thermal characteristics

W. Zenger F. De Wild

TF B1.42 Further recommendations on HVDC cable systems

G. Evenset X

Kleurcode: van TF naar WG, nieuwe TF, voorgesteld aan NNC

Overzicht interessante papers

PS1: Newly installed/upgraded cable systems

Papers Onderwerp Belang voor NL

Voor wie interessant

Hoe inte-ressant?

101 Oplevering circuit Nee

102 Reductie EMF Ja TSO,C +

103 Oplevering circuit Nee

104 Risk assessment Ja TSO, M, C, TI +

105 Bonding Ja TSO, M, C +

106 400 kV in Mexico Nee

107 OHL vss UGC in Brazil Nee

108 T-joints Ja TSO +-

109 Tunnels Ja TSO, C, M, IC +

Interessante papers

Title

• B1-102 Reduction of magnetic field levels on joint graves

Summary

• This paper reports about an underground 220 kV cable link across the urban area of Buenos Aires. The magnetic field levels requested by local utilities are half of the regulatory national level. The whole link is under this limit with the exception of the joint bays. Thus mitigation techniques have to be applied. Passive loops are preferred, as most cost effective solution, to ferromagnetic plates or increased depth of laying. The original magnetic fields are reduced by more than 50%. On field measured values are consistent with foreseen calculated values.

Innovative elements:

• Calculation results regarding magnetic shielding methods around cables. Passive loop effectiveness was calculated and measured as a check. In the end, max. magnetic field was 2.5 uT for 220 kV, 300 MVA

Interessante papers Title

• B1-104 Availability and risk assessment of 380 kV cable systems in transmission grids

Summary

• Construction of a long 380 kV double circuit in The Netherlands lead the local TSO to investigate the behaviour of EHV cables in a transmission grid; this study was made with cooperation from other TSOs and the results are reported in the paper. The risk position of the Utility can be improved either by reducing the outage duration and/or the failure rate. Failure rate can be decreased by quality assurance procedures (at design, manufacturing, testing and operation stages). Reducing the impact of failure, by acting at component level (e.g.explosion-free terminations), taking measures for reducing the repair time (reactive teams,spare management, etc…) are also important for decreasing the total outage time.


• Strategic consideration of reliability and quality management of 400 kV power cables


• B1-105 Guide to sheath bonding design, in distribution and transmission lines with HV underground cables

Summary

• Increasing use of HV underground cables in large cities, increasing fault currents and increasing lengths of elementary cable sections make necessary the need to have proper design criteria for both the SVLs and the insulation level of cable system components. A software package has been developed for calculating the metallic sheath overvoltages in different standard configurations and for different short circuit currents. A guide has been issued from these calculations for use in practical cases occurring on HV system up to220 kV.


• Actually not many, but this is a good overview of short circuit situations in HV power cables, addressing voltages/currents in complex bonded cable circuits, and addressing the ways to select SVL's

Interessante papers

Title

• B1-108 Design and installation of one section of Anhanguera - Casa Verde underground transmission line -138

Summary

• Special accessories are often a good solution to overcome particular issues is specific projects. An application case is presented in this paper: two cable sections with respectively one and two cables per phase had to be connected; different solutions were studied and finally T-joints were used. The paper describes the joint itself, its physical arrangement in the joint chamber, the changes made to the grounding system. It also gives a general overview of possible advantages in using T-joints..


• Usage of T-Joints to connect 1 phase cable to 2 phase cables

Interessante papers

Title

• B1-109 EHV cable installation technology for tunnels and ducts in Japan

Summary

• The paper gives a comprehensive description of technological issues to be considered in cable installations in tunnels and ducts, particularly when long-lengths are involved. Various subjects are discussed, including effective use of existing infrastructure, new joint installation technologies for existing narrow manholes and installation technologies for vertical shafts. Also comparisons between technologies, tests on mock-up assemblies and practical experience are reported.


• Overview of Japanese experience with HV cables in tunnels

PS2: State-of-the-art and trends for cable system

rating, testing and monitoring



Hoe inte-ressant?

201 PD measurements Ja TI, TSO -+

202 New LV cable test method Ja M, TI, IC, DNO, Ind

+

203 Background of Testing HVDC cables

Nee

204 Resonance testing Ja TI -+

205 Experience with DRS Ja TSO, C -+

206 MV PD measurements in Poland

Nee

207 Condition assessment Ja DNO, TSO, C, TI

+

PS2: State-of-the-art and trends for cable system

rating, testing and monitoring



Hoe inte-ressant?

208 Cancelled

209 Thermal modeling Ja C -

210 Condition of paper cables Ja TSO, TI, C +

211 Iljin as 400 kV manufacturer Enig TSO -+

212 Asset management of cables Ja TSO -+

213 Cancelled

214 calc and meas’rd transmission capacity

Nee

215 New cable type with recyclable plastic

Ja DNO, TSO, C, M

+


• B1-202 Pneumatic testing of the insulation of low-voltage underground cables

Summary

• Low Voltage (LV) cables may easily suffer damages during handling and pulling. The paper presents a new method of verifying the condition of the insulation of installed LV cables by injecting compressed air into the cable core and then checking how well pressure is maintained. Three variants of the same method are presented. Defective insulation is detected by a drop in pressure. Method has been proven with an extensive laboratory test program, and then prototype testers have been successfully used on the underground distribution system.


• New test method to ensure quality of LV power cables, using air pressure


• B1-207 Condition assessment of synthetic insulated cables and accessories operating more than 20 years in the French network

Summary

• Ageing evaluation of cable assets is often a main concern for TSOs. The paper reports a French experience, where cooperation with manufacturers allowed the appraisal of the status of synthetic insulated cables and accessories removed from the field. To obtain significant data, cable and accessory samples have been randomly picked out; physical and chemical properties and electrical performance of different components have been investigated and compared to their initial conditions. Similar characteristics have been globally found, with a few exceptions which are currently still under evaluation.


• Full evaluation of ageing of extruded cables by performing mechanical, electrical, chemical and overall tests on the cable system including accessories.


• B1-210 Condition and remaining life of taped transmission cables through non-invasive and invasive testing based on in-service cables and cable samples removed from service

Summary

• The authors draw the reader’s attention to the large number of taped cables that have exceeded their 40-year design life limit but are still part of the High Voltage US underground transmission system; this lead to the need of condition and life assessment of taped cables. The paper covered non-invasive testing which included dissolved gas analysis (DGA), and fluid testing. It also covered invasive testing on removed samples, like visual inspection and a number of possible tests and measurements. The result of this testing program concluded that DGA is an effective tool for condition assessment of laminated cable whilst invasive testing on cable samples may help to better understand the cable’s condition and its remaining life.


• Overview of USA paper cable experience with DGA. We can learn indicators for reduced condition of paper taped cables.


• B1-215 Integrated development and assessment of new thermoplastic high voltage power cable systems

Summary

• In this paper Authors discuss the better results in terms of whole life performance obtained by new high temperature and recyclable thermoplastic cables for HV. Dedicated software has been used to assess performance, with assumptions on production process and work conditions. It is reported that with this new generation of cables, the conductor cross sections could be reduced, but losses would increase. Savings in terms of energy by using thermoplastic materials are announced, both for the material production process and the cable production process. Performance improvements and savings, in terms of total CO2 reduction(for whole product life) are calculated (as a percentage) compared to current XLPE cables.


• New cable design using recyclable plastics as insulator instead of XLPE, leading to better performing cables. Next to this, usage of a new 'LEETS method' to compare different cable technology on multiple criteria.

PS3: Cables in the network of the future



Hoe inte-ressant?

301 HTS for urban power supply Enig DNO, TSO, U -+

302 HTS HVDC cables Nee

303 Conversion of submarine HVAC to HVDC cable

Nee

304 Cable tests with nano composited insulation compounds

Nee


• B1-301 Superconducting medium-voltage cables for urban power supply as an alternative scenario to 110 kV installations

Summary

• The purpose of this paper is to show the results of a comprehensive study that was carried out to assess the technical and commercial feasibility of the use of High Temperature Superconducting (HTS) cables in highly populated areas. The study includes a preliminary investigation of the target grid, thus being able to compare different solutions (overhead and underground, HV and MV, conventional and HTS cables). Conceptual design of superconductive cables and relevant accessories is presented, with focus on a system capabl eof carrying a permanent current of 2310 A at 10 kV. A specific study is based on the example of the inner city of Essen, Germany, and which is now developing into a proper pilot project that will include HTS cables as part of the local MV grid.


• details regarding economic feasibility of HTS cables are given, Germany is conducting pilot project of 1 km in lenght, which may be successful, feasibility study outline is given.

Overzicht agenda Parijs

Agenda Parijs

Woensdag 29 Augustus, 9:00-12:00 uur

• Poster sessie

Vrijdag 31 Augustus, 8:45-18:00 uur

• Discussie sessie

- PS1: Newly installed or upgraded cable systems

- PS2: State-of-the-art and trends for cable system rating, testing

and monitoring

- PS3: Cables in the network of the future

SC activiteiten

• Dinsdag en woensdag SC B1 meeting

• Verschillende WG meetings

Nederlandse bijdragen PS1Q1

What is threshold when deciding between AC and DC and the voltage level used? What are the issues with long AC connections?

TSO?

PS1Q2

What are environmental threats and benefits in constructing underground/submarine cables?

TSO/DNO?

PS1Q3

How are reliability issues treated when considering components which are ‘unique’ and what is the actual service experience with them?

TSO? DNV KEMA?


Hybrid systems. What are lessons learnt and what are planning policies wrt partial undergrounding of existing lines, dynamic ratings, operation, protection etc.?

TSO?

PS1Q5

What are drivers in the selection of installation methods, installation lay out, protection of submarine cables?

TSO, Manufacturer, installation company?

PS2Q1

How can mathematics and modelling further improve the knowledge of actual cable systems and the ability to innovate?

University?


What is the experience with on-site PD testing and what further improvements are expected?

DNV KEMA?

PS2Q3

Thermal monitoring/DRS: How are the evolution of ambient conditions and parameters during cable life affecting performance? How is this evolution accomodated and considered? What are lessons learned to be applied at planning stages?

DNV KEMA

PS2Q4

New diagnostic techniques: In an ideal whish list, what are the parameters and phenomena that utilities may want to monitor?

DNV KEMA, DNO?, TSO?


What policies are in place for asset management, maintenance and replacement? Which additional tools may improve them?

DNV KEMA

PS3Q1

How close is the future of HTS, new materials, new cable types?

DNO? University? Manufacturer?

PS3Q2

Smart grids: What are smart tools that can be provided within and through a power transmission system? What kind of intelligence may power cables have? What could be the involvement of the cable system in a general smart grid development process?

All? DNV KEMA


What are possible different/future usage of HTS cables?

DNO?

PS3Q4

What are needs associated to cable systems to operate both in AC and DC? What are the experiences in ongoing studies?

University?

PS3Q5

Power cables for ultra high voltages: What innovations might boost the feasibility of such large projects? What are the steps forward to increase voltages in AC and DC?

Manufacturer?

Bedankt voor uw aandacht !

Frank de Wild

Principal consultant underground and submarine power cables

DNV KEMA

Tel: +31 26 356 6176

Email: [email protected]

NSC B1 Power Cables - Stichting CIGRE Nederland€¦ · B1.34 Mechanical forces in large cross...

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Transcript of NSC B1 Power Cables - Stichting CIGRE Nederland€¦ · B1.34 Mechanical forces in large cross...