ENGINEERING COMMISSIONING PROCEDURElibrary.ukpowernetworks.co.uk/library/asset/6f2eeb12...The...
14
Document Number: ECP 11-0504 Version: 5.0 Date: 18/10/2018 THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE ENGINEERING COMMISSIONING PROCEDURE ECP 11-0504 SECONDARY SUBSTATION ENERGISATION PROCEDURE Network(s): EPN, LPN, SPN Summary: This procedure details the energisation procedures for secondary distribution substations, and includes high voltage insulation testing, energisation and post- energisation checks, which shall be satisfied before the substation can be accepted as fit for service. Author: Stephen Tucker Date: 18/10/2018 Approved By: Paul Williams Approved Date: 26/10/2016 This document forms part of the Company’s Integrated Business System and its requirements are mandatory throughout UK Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset Management. If you have any queries about this document please contact the author or owner of the current issue. Applicable To UK Power Networks External All UK Power Networks G81 Website Asset Management Contractors Capital Programme ICPs/IDNOs Connections Meter Operators HSS&TT Network Operations UK Power Networks Services Other
Transcript of ENGINEERING COMMISSIONING PROCEDURElibrary.ukpowernetworks.co.uk/library/asset/6f2eeb12...The...
Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
TH
IS IS
AN
UN
CO
NT
RO
LL
ED
DO
CU
ME
NT
, T
HE
RE
AD
ER
MU
ST
CO
NF
IRM
IT
S V
AL
IDIT
Y B
EF
OR
E U
SE
ENGINEERING COMMISSIONING PROCEDURE
ECP 11-0504
SECONDARY SUBSTATION ENERGISATION PROCEDURE
Network(s): EPN, LPN, SPN
Summary: This procedure details the energisation procedures for secondary distribution substations, and includes high voltage insulation testing, energisation and post-energisation checks, which shall be satisfied before the substation can be accepted as fit for service.
Author: Stephen Tucker Date: 18/10/2018
Approved By: Paul Williams Approved Date: 26/10/2016
This document forms part of the Company’s Integrated Business System and its requirements are mandatory throughout UK Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset Management. If you have any queries about this document please contact the author or owner of the current issue.
Applicable To
UK Power Networks External
All UK Power Networks G81 Website
Asset Management Contractors
Capital Programme ICPs/IDNOs
Connections Meter Operators
HSS&TT
Network Operations
UK Power Networks Services
Other
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 2 of 14
Revision Record
Version 5.0 Review Date 04/12/2020
Date 18/10/2016 Author Stephen Tucker
Why has the document been updated: Introduction of new HV metering unit
What has changed: Testing customer HV cables added (Section 6)
Version 4.0 Review Date 04/12/2020
Date 04/12/2015 Author Stephen Tucker
Why has the document been updated: Renumbering of referenced documents
What has changed: HV insulation testing and HV polymeric cable sheath testing document references updated (Section 6). Labelling of Pfisterer sockets added (Section 7.4.14)
Version 3.0 Review Date
Date 06/12/2013 Author Stephen Tucker/ Paul Williams
Procedure for testing new polymeric insulated cables added (Section 6)
Version 2.2 Review Date
Date 04/11/2013 Author Stephen Tucker
Document type corrected
Version 2.0 Review Date
Date 12/08/2013 Author Stephen Tucker
Updated to reflect current operational practice across all three networks. Sheath test added (Section 6). Test forms removed and incorporated into ECP 11-0501
Version 1.3 Review Date
Date 17/08/2012 Author Lee Strachan
Reviewed for publication on G81 Website
Version 1.2 Review Date
Date 13/09/2011 Author John Lowe
Document renumbered
Version 1.0 Review Date
Date 05/02/2010 Author Alan Baldock/ Stephen Tucker
Original
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 3 of 14
Contents
1 Introduction ............................................................................................................. 4
2 Scope ....................................................................................................................... 4
3 References ............................................................................................................... 5
4 Abbreviations and Definitions ................................................................................ 5
5 Equipment ................................................................................................................ 5
6 HV Cable Tests ........................................................................................................ 6
7 Energisation Process .............................................................................................. 7
7.1 Overview ................................................................................................................... 7
7.3 Initial Configuration .................................................................................................... 7
7.4 Energisation using a Phase Comparator ................................................................... 7
7.5 Energisation at Sites with LV Backfeed ................................................................... 11
7.6 Energisation at Sites without LV Backfeed .............................................................. 12
7.7 Energisation at Sites using an End-to-End Test ....................................................... 12
8 Post-energisation Checks ..................................................................................... 13
9 Final Checks .......................................................................................................... 13
10 Test Equipment ..................................................................................................... 13
11 Certification ........................................................................................................... 13
12 Asset Data and Information .................................................................................. 13
12.1 UK Power Networks ................................................................................................ 13
12.2 Independent Connection Provider (ICP) .................................................................. 13
Appendix A – Phasing Checks ......................................................................................... 14
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 4 of 14
1 Introduction
1.1 This procedure details the energisation procedures for secondary distribution substations, and includes high voltage insulation testing, energisation and post-energisation checks, which shall be satisfied before the substation can be accepted as fit for service.
1.2 This procedure shall be carried out by the Commissioning Engineer or his appointed representative, who shall be an Authorised Person having appropriate training and experience.
1.3 This procedure shall be carried out in accordance with the requirements of the UK Power Networks Distribution Safety Rules.
1.4 This procedure shall be carried out having regard to the requirements and recommendations of the manufacturer. If conflict exists between the requirements of the manufacturer and those of UK Power Networks the matter shall be referred to Asset Management (or your UK Power Networks nominated contact).
1.5 This procedure assumes the following:
The transformer has been commissioned in accordance with ECP 11-0506 of the commissioning manual.
The HV switchgear has been commissioned in accordance ECP 11-0511/ECP 11-0512.
The fault passage indicator (FPI) has been commissioned in accordance with section ECP 11-0521, if applicable.
The necessary protection settings have been applied.
The substation and all equipment are correctly earthed.
1.6 The results of all observations, tests, adjustments and all relevant remarks shall be recorded on the appropriate test form.
2 Scope
2.1 This procedure and the associated test form(s) applies to the energisation of 11kV and 6.6kV secondary distribution substations.
2.2 Although not specially covered within this procedure the principles can be applied to the energisation of an item of new equipment at a substation. The actual process should be agreed between the Authorised Person and the Control Engineer.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 5 of 14
3 References
3.1 This procedure should be read in conjunction with the following references:
HSS 40 043 High Voltage System Phasing Checks.
ECS 11-0006 HV Insulation Testing.
ECP 11-0007 HV Polymeric Cable Sheath Testing Procedure.
ECP 11-0511 Ground Mounted Switchgear Commissioning Procedure.
ECP 11-0512 Ground Mounted Switchgear with Relays Commissioning Procedure.
ECP 11-0521 Nortroll Cable Troll 2350 FPI Installation and Commissioning Procedure.
3.2 This procedure should be used with the following test forms:
ECP 11-0501a Secondary Substation Commissioning Form.
ECP 11-0007a HV Polymeric Cable Sheath Test Form.
4 Abbreviations and Definitions
4.1 The following abbreviations are used throughout this procedure.
Term Definition
ART UK Power Networks Asset Registration Team
CT Current Transformer
VT Voltage Transformer
5 Equipment
5.1 The following test equipment is required to carry out the tests detailed in this procedure:
High voltage testing equipment (5kV insulation resistance tester, HV AC test set or HV DC test set).
Pfisterer K-827-189-007-F phase comparator (refer to HSS 40 043).
Test lamp.
Multi-meter.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 6 of 14
6 HV Cable Tests
6.1 Record the substation details on the test form.
6.2 Carry out sheath tests on all new polymeric insulated HV cable prior to connection in accordance with ECP 11-0007 and record the overall result on test form ECP 11-0501a.
6.3 Carry out high voltage insulation tests on all HV cables after connection to the existing distribution network in accordance with ECS 11-0006 and record the results on test form ECP 11-0501a.
Carry out high voltage insulation tests on all new customer HV cables in accordance with ECS 11-0006 and record the results on test form ECP 11-0501a. Note: Where it is not practical, due to the design of the HV metering unit, to disconnect the VT the customer cable should be tested after the cable terminations have been completed but before the cable is connected to the metering unit.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 7 of 14
7 Energisation Process
7.1 Overview
7.2 The energisation process detailed in this section are based on high voltage system phasing checks outlined in HSS 40 043. The process shall be carried out in accordance with the Distribution Safety Rules ensuring that the correct safety documentation is in place.
7.2.1 Record the results on test form ECP 11-0501a.
Note: This process covers the energisation of a substation using a phase comparator (Pfisterer) which is the safest method of energisation; however this method will not detect a roll on both sides of a HV cable which although not a dangerous situation is likely to cause inconvenience in the future. Traditional methods of energising substations with and without LV backfeeds are also included for completeness.
7.3 Initial Configuration
7.3.1 The new substation is named Sub New. It has been inserted in a ring between existing substations Sub A and Sub B as shown below.
Sub BSub NewSub A
Sub C
7.3.2 Circuit Main Earths (CME) are in place at:
Sub A on the Sub New substation circuit.
Sub B on the Sub New substation circuit.
7.3.3 The Sub New substation has been installed and the cables terminated.
7.4 Energisation using a Phase Comparator
7.4.1 This section describes the process for energising a site with or without an LV backfeed. All switching operations shall be carried out in accordance with normal control procedures.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 8 of 14
7.4.2 Step 1 – Switching Operations
Close both switches and the transformer circuit-breaker at Sub New.
Remove Earth at Sub B on the Sub New circuit.
Remove Earth at Sub A on the Sub New circuit.
The network status on completion of Step 1 is shown below.
Sub BSub NewSub A
7.4.3 Step 1 – Items Proved
None.
7.4.4 Step 2 – Switching Operations
At Sub A close Sub New switch.
The network status on completion of Step 2 is shown below.
Sub BSub NewSub A
7.4.5 Step 2 – Checks Using the Phase Comparator
At Sub New on Sub A switch, all 3 Voltage Indicating Sockets (VIS) indicate Live and out of phase with each other.
At Sub New on Sub B switch, all 3 VIS indicate Live and out of phase with each other.
At Sub New confirm HV phasing indication between:
Sub A Switch Sub B Switch Phasing
L1 L1 IN
L1 L2 OUT
L2 L2 IN
L2 L3 OUT
L3 L3 IN
L3 L1 OUT
Where L1 = R, L2 = Y and L3 = B.
Check the voltage and phase rotation at the LV cabinet/board.
If Sub New is or will be connected to a local interconnected LV network, then the phase relationship of Sub New site with that existing network should also be proved at this stage of commissioning, wherever possible.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 9 of 14
7.4.6 Step 2 – Items Proved
The VIS on both switches at Sub New are connected to the same respective cable box bushings (i.e. L1, L2 and L3 are the same HV phases on both switches).
The Pfisterer phase comparator is configured correctly for the type of switchgear under test (i.e. Lucy, Schneider).
The LV voltage is correct.
7.4.7 Step 3 – Switching Operations
At Sub New open Sub A switch.
The network status on completion of Step 3 is shown below.
Sub BSub NewSub A
7.4.8 Step 3 – Checks
At Sub New on Sub A switch, check all 3 VIS indicate Live.
At Sub New on Sub B switch, check all 3 VIS indicate Dead.
At Sub New confirm that the transformer is Dead.
7.4.9 Step 3 – Items Proved
Switch labelling is correct at Sub New.
All three cores from Sub A cable are connected to switch Sub A at Sub New.
VIS on Sub A switch are connected to cable side of Sub A switch.
VIS on Sub B switch are not connected to Sub A side.
7.4.10 Step 4 – Switching Operations
At Sub New open Sub B switch.
At Sub B close New substation switch.
The network status on completion of Step 4 is shown below.
Sub BSub NewSub A
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 10 of 14
7.4.11 Step 4 – Checks
At Sub New on Sub B switch, check all 3 VIS indicate Live.
At Sub New confirm that the transformer is Dead.
Ensure Pfisterer phase comparator connections are the same as phase checks in Step 2.
At Sub New using the phase comparator confirm the HV phasing between:
Sub A Switch Sub B Switch Phasing
L1 L1 IN
L1 L2 OUT
L2 L2 IN
L3 L2 OUT
L3 L3 IN
L3 L1 OUT
7.4.12 Step 4 – Items Proved
VIS on Sub B switch are connected to cable side of Sub B switch.
Cables from Sub A and Sub B are in phase.
7.4.13 Step 5 – Switching Operations
Restore network to final running arrangement.
7.4.14 On completion of the test install a label next to the VIS sockets as shown in the example below.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 11 of 14
7.5 Energisation at Sites with LV Backfeed
7.5.1 This section describes the traditional process for energising a site with an LV backfeed.
7.5.2 Step 1
At Sub New close Sub A switch and the transformer circuit-breaker.
At Sub A remove earth on the Sub New circuit.
At Sub A close Sub New switch.
At Sub New phase out at the LV cabinet.
At Sub New open Sub A switch.
Check transformer is Dead via the LV cabinet/board
Check labels.
7.5.3 Step 2
At Sub New close Sub B switch.
At Sub B remove earth on the Sub New circuit.
At Sub B close Sub New switch.
At Sub New phase out at the LV cabinet/board.
At Sub New confirm HV phasing indication using Phase Comparator:
Sub A Switch Sub B Switch Phasing
L1 L1 IN
L1 L2 OUT
L2 L2 IN
L2 L3 OUT
L3 L3 IN
L3 L1 OUT
At Sub New open Sub B switch.
Check transformer is dead via the LV cabinet/board
Check labels.
7.5.4 Restore network to the final running arrangement.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 12 of 14
7.6 Energisation at Sites without LV Backfeed
7.6.1 This section describes the traditional process for energising a site without an LV backfeed.
7.6.2 Where there is no LV reference at the new substation, the circuit can be energised all the way from Sub A to Sub B. Sub B is made dead and then re-energised by closing the incoming feed from Sub A (via New substation). Phasing is then carried out at transformer way in Sub B. A rotation check is carried out at the Sub New to check for a double cross.
7.6.3 Step 1
At Sub New close Sub A switch and Sub B switch.
At Sub A and Sub B remove earth on the Sub New circuit.
At Sub A close Sub New switch.
At Sub B apply LV backfeed and open LV isolator.
At Sub B open Sub C switch and close Sub New switch.
At Sub B phase out at the LV cabinet/board.
At Sub New open Sub A switch.
Check labels.
At Sub New check phase rotation at LV cabinet/board.
Restore LV network to normal at Sub B.
7.6.4 Where it is not possible to backfeed or switch off Sub B (e.g. dedicated LV supplies or HV supply) phasing using an end-to-end test is permissible (refer to Section 7.7).
7.6.5 Restore network to the final running arrangement.
7.7 Energisation at Sites using an End-to-End Test
7.7.1 Where none of the above methods are possible, where practicable an end-to-end phase check is permissible in accordance with HSS 40 043.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 13 of 14
8 Post-energisation Checks
8.1 Record the substation details on the test form.
8.2 Carry out the relevant checks detailed below and complete the relevant sections of test from ECP 11-0501a.
Measure the voltage at the LV cabinet/board.
For sites with LV backfeed – phase out at the LV cabinet/board using a test lamp.
For sites without LV backfeed – check phase rotation at the LV cabinet/board.
9 Final Checks
9.1 On completion of the energisation process ensure that:
The network is restored to final running arrangement.
The LV isolator is closed.
10 Test Equipment
10.1 Record the purpose, make, type and serial number of all test equipment used during commissioning on the relevant test form.
11 Certification
11.1 When all the tests have been satisfactorily completed, sign and date the test form.
11.2 Place a copy of the completed test form on-site in a plastic wallet and in a secure location.
12 Asset Data and Information
12.1 UK Power Networks
12.1.1 Send a copy of the completed test form to the Asset Registration Team (ART) via the appropriate mailbox below.
12.2 Independent Connection Provider (ICP)
12.2.1 Send a copy of the completed test form to the Competition-in-Connections Delivery Project Manager.
Secondary Substation Energisation Procedure Document Number: ECP 11-0504
Version: 5.0
Date: 18/10/2018
© UK Power Networks 2016 All rights reserved 14 of 14
Appendix A – Phasing Checks
Phasing Checks
Test
Sub A New Sub B Checks @ New Substation
New SW
Sub A SW
Sub B SW
CB New SW
Sub A SW
Sub B SW
Phasing ()
1 Open Closed Closed Closed Open Starting arrangement
2 Closed Closed Closed Closed Open
L1-L2-L3 Live
OUT
L1-L2-L3 Live
OUT
L1 L1 IN
L1 L2 OUT
L2 L2 IN
L2 L3 OUT
L3 L3 IN
L3 L1 OUT
Transformer Live
3 Closed Open Closed Closed Open
L1-L2-L3 Live
L1-L2-L3 Dead
Transformer Dead
4 Closed Open Open Closed Closed
L1-L2-L3 Live
OUT
L1-L2-L3 Live
OUT
L1 L1 IN
L1 L2 OUT
L2 L2 IN
L2 L3 OUT
L3 L3 IN
L3 L1 OUT
Transformer Dead
