ECP SECONDARY COMMISSIONING REQUIREMENTS

Transcription

1 Document Number: ECP Network(s): Summary: ENGINEERING COMMISSIONING PROCEDURE ECP SECONDARY COMMISSIONING REQUIREMENTS EPN, LPN, SPN This standard details the commissioning requirements for secondary substations, plant and equipment. These requirements apply to all UK Power Networks staff and contractors involved in commissioning. Author: Stephen Tucker Approved By: Paul Williams Approved Date: 16/02/2017 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 Asset Management G81 Website Capital Programme Contractors Connections ICPs/IDNOs Health & Safety Meter Operators Network Operations Procurement Technical Training UK Power Networks Services THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE

2 Revision Record Version 7.0 Review Date 10/02/2022 Date 10/02/2017 Author Stephen Tucker Why has the document been updated: Alignment with other referenced documents. What has changed: Secondary substation end-to-end commissioning process included (Section 4). Document references updated (Sections 2, 5.2, 5.3 and 7). Renumbered from ECS to ECP Document reviewed and review date extended Version 6.0 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 document reference updated (Section 5.2). HV polymeric cable sheath testing document reference updated (Section 5.3). LV cable testing document reference updated (Section 5.4). Version 5.0 Review Date 23/03/2019 Date 07/09/2015 Author Kevin Burt Why has the document been updated: Update. What has changed: Requirement to store.pdf copies of test forms in Alfresco added (Section ). Version 4.0 Review Date 23/03/2019 Date 23/03/2015 Author Stephen Tucker Why has the document been updated: Document updated to include metering test requirements. What has changed: LV cable testing added (section 5.4). BSC metering requirements added (Section 5.12). Energisation checks split into pre and post (Sections 5.13 and 5.14). Version 3.0 Review Date 24/01/2019 Date 06/12/2013 Author Stephen Tucker Procedure for testing new polymeric insulated cables added (Section 5.3) Version 2.0 Review Date Date 30/09/2011 Author Stephen Tucker Document reviewed and updated no major changes Version 1.2 Review Date Date 25/08/2011 Author Chris Anderson Document reclassified from EI to ECS Version 1.0 Review Date Date 13/04/2010 Author Stephen Tucker Original UK Power Networks 2017 All rights reserved 2 of 8

3 Contents 1 Introduction Scope Definitions Commissioning Tests Test Schedule Inspection HV Insulation Test HV Cable Sheath Test LV Cable Test Resistance Measurements CT Wiring Primary Injection Relay Secondary Injection Pilot Wires Functional and Telecontrol Tests Earthing Metering Pre-energisation Checks Post-energisation Checks Test Results References... 8 UK Power Networks 2017 All rights reserved 3 of 8

4 1 Introduction This standard details the commissioning requirements for secondary substations, plant and equipment and include: Ground-mounted 11/6.6kV switchgear. Pole-mounted 11/6.6kV switchgear. Distribution transformers. Compact and micro substations. Protection associated with the above switchgear. Fault passage indicators (FPI). Control units and remote terminal units (RTU). Earthing. Cable insulation tests. Substation energisation and post-energisation. The Commissioning Engineer acts on behalf of all the stakeholders responsible for the future operation and maintenance of new equipment. Commissioning tests are a form of assurance that the plant and equipment will operate safely and correctly and are carried out to prove that: The design specifications for the equipment are satisfied. The equipment can be confidently and safely connected to the system. The test results for the equipment are within acceptable limits. The equipment together with its protection and control equipment will function correctly. The installation and the test results are recorded. 2 Scope These requirements apply to all new and existing secondary substations and overhead sites which are commissioned by UK Power Networks Engineers or appointed Contractors. These requirements apply to the EPN, LPN and SPN networks. Note: The installation and commissioning requirements for grid and primary substations, plant and equipment are detailed in ECP This document is intended for internal and external use. UK Power Networks 2017 All rights reserved 4 of 8

5 3 Definitions Term Alfresco ART BSC CT PowerOn FPI Definition UK Power Networks Enterprise Content Management System Asset Registration Team Balancing and Settlement Code Current Transformer UK Power Networks Network Management System Fault Passage Indicator 4 Commissioning Tests The minimum testing and commissioning requirements for secondary substations and equipment are outlined in Section 5. ECP outlines the end-to-end process for commissioning a secondary substation and details the individual commissioning procedures and test forms to record the results. Any omissions should be referred to the author of this standard. 5 Test Schedule 5.1 Inspection Equipment shall have a visual inspection before further commissioning is carried out. 5.2 HV Insulation Test Equipment and cables shall be subject to a high voltage insulation test in accordance with ECP HV Cable Sheath Test All new HV polymeric insulated underground cables shall be subjected to a sheath test in accordance with ECP LV Cable Test All LV cables shall be tested in accordance with ECP Resistance Measurements The resistance of the following shall be measured: Site-assembled busbars using a micro-ohmmeter. The contact resistances of all switches, circuit-breakers and disconnectors using a multi-meter or micro-ohmmeter. UK Power Networks 2017 All rights reserved 5 of 8

6 5.6 CT Wiring CT wiring shall be subject to an insulation resistance and continuity test. 5.7 Primary Injection 1 The following shall be subject to a primary injection test: Protection current transformers. FPI current transformers. Differential protection schemes. 5.8 Relay Secondary Injection 1 Protection relays and FPIs shall be subject to a secondary injection test to prove in-service settings. 5.9 Pilot Wires Pilot wires shall be subject to an insulation resistance and loop resistance Functional and Telecontrol Tests Switchgear shall be subject to the following functional tests and in the order specified: Manual operation to prove normal operation and interlock checks. Local operation from the control unit/rtu. Remote operation from Power On. This shall include all control, alarm, indication and measurements. Note: Where it is not possible to complete the end-to-end testing between PowerOn and the switchgear, a switchgear simulator connected to the control unit/rtu may be used provided the local operation of the switchgear has already been proved from the control unit/rtu Earthing The earthing system shall be subject to the following checks: A visual inspection of the complete earthing system including the fence(s) and all connections. All design recommendations have been implemented. A measurement of the overall earth resistance. 1 It is not deemed practical to carry out these tests on pole-mounted equipment during routine installation and commissioning. UK Power Networks 2017 All rights reserved 6 of 8

7 5.12 Metering All metering current transformers (CT) and voltage transformers (VT) shall be subject to the following: Insulation resistance test. Primary injection test to check phasing (VT only) and ratio. Polarity test (CT only). Compliance with the BSC metering requirements detailed in ECP Pre-energisation Checks Before energisation all equipment shall be subject to the following checks: Testing and commissioning is complete. All test results are satisfactory. Final protection (or appropriate temporary settings) settings are applied. Energisation shall be carried out in accordance with commissioning procedure ECP Post-energisation Checks After energisation the following checks shall be carried out: LV voltage correct. Phase rotation correct. On-load stability of directional and differential protection. Final PowerOn communications/operations check. Confirmation that analogues are correctly displayed on Power On. Asset and protection data forms are completed and submitted to the ART or UK Power Networks contact. 6 Test Results The cost and effort of carrying out commissioning can be wasted if the results are not recorded in a consistent and usable manner. As a minimum requirement all completed test forms shall be: Stored securely on site. Attached as a pdf document to the relevant site in Alfresco Powershare under the Asset Management Site and Reference Library. UK Power Networks 2017 All rights reserved 7 of 8

8 7 References ECP ECP ECP ECP ECP ECP ECP Grid and Primary Installation and Commissioning Requirements HV Insulation Testing HV Polymeric Cable Sheath Test Procedure LV Cable Testing Procedure BSC Metering Equipment Commissioning Requirements Secondary Substation Commissioning Procedure Secondary Substation Energisation Procedure UK Power Networks 2017 All rights reserved 8 of 8