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Meter Asset Management Plan EXECUTIVE SUMMARY This document describes the Metering asset methodology for Ergon Energy s Electricity Metering Asset Class. This document has been developed to guide the decisions,
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Meter Asset Management Plan EXECUTIVE SUMMARY This document describes the Metering asset methodology for Ergon Energy s Electricity Metering Asset Class. This document has been developed to guide the decisions, processes and systems that are used to maximise the technical and operational performance whereby adding value of Ergon Energy s meter equipment over the asset lifecycle and ensures regulatory compliance. This Metering Asset Management Plan [MAMP] will be maintained and published by the Principal Engineer Metering and will be published on Ergon Energy s process zone and subject to an annual cyclic review. The review will coincide with any future submission of Regulatory Information Notice (RIN) data. The General Manager Network Monitoring & Processing is assigned the Responsible Person [RP] role under the National Electricity Market [NEM] rules, and the Executive General Manager Asset Management is the Local Network Service Provider [LNSP]. This MAMP has been aligned with Ergon Energy s vision of the future to have metering capabilities whereby we will be recognised by our customers as a responsive and competent Meter Provider of choice, this also ensures that metering assets are fit for purpose and provide a good rate of return, and complies with all metering National and Jurisdictional laws, codes and rules. Ergon Energy is committed to maintaining accreditation as a Type 1 to 6 Meter Provider (MPB). Some of the main areas described in this document include improving asset information, meter asset life-cycle control, budget and cost tracking, meter fleet compliance, installation quality, and type 5 meter data improvements. The main areas described in this document include: Improving asset information; Meter asset life-cycle control; Budget and cost tracking; Meter fleet compliance; Installation quality; and Type 5 meter data improvements. Ergon Energy s MAMP is based on the principles and timeframes laid down in schedule 7.3 of Chapter 7 National Electricity Rules [NER]. This includes: Testing of all Type 1-4 Metering based on a 2.5 yearly inspections (HV), 5 yearly meter accuracy and 10 year CT/VT test; and Applying AS1284 Part 13 In-situ testing for direct connect metering families. All new metering equipment complies with the National Electricity Rules - Chapter 7, Electricity Industry Code (Qld), Chapter 9 Metering, Type 1-7 Metrology procedures and the National Measurements Institute. designs and construction methods are employed when installing metering equipment and these are specified in the Queensland Electricity Connection and Metering Manual (QECMM). Non-standard designs must be approved by the Principal Engineer Metering. Check this is the latest Process Zone version before use. ii Meter Asset Management Plan Table of Contents EXECUTIVE SUMMARY PURPOSE RESPONSE INSTALLATION HISTORY METERS CURRENTLY BEING INSTALLED BY ERGON ENERGY REVISED AGE PROFILES (AT JUNE 2012) ERGON ENERGY S METERING CAPABILITY MAMP REVIEW PERIOD METER MANAGEMENT PLAN & STRATEGY HV METERING EQUIPMENT HV VOLTAGE TRANSFORMERS HV CURRENT TRANSFORMERS TYPE 1 3 ENERGY METERS LV METERING EQUIPMENT TYPE 4 6 ENERGY METERS RIPPLE CONTROL & TIME SWITCHES STRATEGIES FOR FAMILY FAILURES IN-SITU TESTING PLAN & METER MANAGEMENT STRATEGY ELECTROMECHANICAL & ELECTRONIC METERS RIPPLE RECIEVER TESTING AS FOUND SAMPLE TESTING OF METERS CARD OPERATED METERS METER NEW AND REPLACEMENT STRATEGY TEST EQUIPMENT MANAGEMENT CALIBRATION INTERVALS FOR TEST EQUIPMENT EQUIPMENT CALIBRATED AT CORRECT INTERVALS TRACEABILITY OF TEST EQUIPMENT MEASUREMENT UNCERTAINTY OF TEST EQUIPMENT APPENDIX A ERGON ENERGY ORGANISATION STRUCTURE FROM MAMP PERSPECTIVE APPENDIX B - METERING RESOURCES APPENDIX C METER LABS TEST CAPABILITY APPENDIX D TEST EQUIPMENT CURRENTLY IN USE APPENDIX E REFERENCES Check this is the latest Process Zone version before use. iii Meter Asset Management Plan Table 1 Quantities and type of meters that are installed in the Network as at June Table 2 Metering Operational Competency... 4 Table 3 Test volumes as at June Table 4 Basic Criteria for Selecting Sub-populations for Sample Testing Table 5 In-Situ Testing Program Plan Figure 1 : The age profile of single phase electromechanical meters... 2 Figure 2 : The age profile of Three Phase Meters... 3 Figure 3 : The age profile of Ripple Control Relays... 3 Figure 4 : Low Voltage CT quantities by family type as at June Figure 5 : Ripple Receiver Test results Figure 6 : The ISO 9001 accreditation process currently in place EXECUTIVE SUMMARY PURPOSE RESPONSE Installation History METERS CURRENTLY BEING INSTALLED BY ERGON ENERGY REVISED AGE PROFILES (AT JUNE 2012) ERGON energy S METERING CAPABILITY MAMP REVIEW PERIOD Meter Management PLAN & Strategy HV METERING EQUIPMENT HV VOLTAGE TRANSFORMERS TYPE OF TEST PERIOD AND TEST VOLUMES PER YEAR HV CURRENT TRANSFORMERS TYPE OF TEST PERIOD AND TEST VOLUMES PER YEAR TYPE 1 3 ENERGY METERS TYPE OF TEST PERIOD AND TEST VOLUMES PER YEAR LV METERING EQUIPMENT CURRENT TRANSFORMERS (LOW VOLTAGE) LV CT TYPE OF TEST PERIOD AND TEST VOLUMES PER YEAR TYPE 4 6 ENERGY METERS CURRENT TRANSFORMER CAPABLE METERS DIRECT CONNECT METERS TYPE OF TEST PERIODS BETWEEN TESTS RIPPLE CONTROL & TIME SWITCHES TYPE OF TEST... 8 Check this is the latest Process Zone version before use. ii Meter Asset Management Plan 6.8. STRATEGIES FOR FAMILY FAILURES STRATEGY FOR METER FAMILY FAILURES ACTIONS FOR METER FAMILY ASSET REPLACEMENT IN-SITU TESTING PLAN & METER MANAGEMENT STRATEGY ELECTROMECHANICAL & ELECTRONIC METERS RIPPLE RECIEVER TESTING AS FOUND SAMPLE TESTING OF METERS CARD OPERATED METERS METER NEW and REPLACEMENT STRATEGY TEST EQUIPMENT MANAGEMENT CALIBRATION INTERVALS FOR TEST EQUIPMENT EQUIPMENT CALIBRATED AT CORRECT INTERVALS TRACEABILITY OF TEST EQUIPMENT MEASUREMENT UNCERTAINTY OF TEST EQUIPMENT Appendix A Ergon Energy Organisation Structure From MAMP Perspective 15 Appendix B - Metering RESOURCES General Manager Network Monitoring & Processing Principal Engineer Metering Manager Meter Provision Manager Meter Strategy Manager Meter Data General Manager Customer Delivery State Metering Manager Manager Commercial Enterprises Appendix C Meter s TEST CAPABILITY Appendix D Test Equipment CURRENTLY IN Use Appendix E REFERENCES Check this is the latest Process Zone version before use. iii Meter Asset Management Plan 1. PURPOSE This document describes the Metering Asset Management methodology for Ergon Energy Electricity Metering Asset Class. This document has been developed to: 1. Guide the decisions, processes and systems that are used to maximise the technical and operational performance and value of Ergon Energy s meter equipment over the asset lifecycle. 2. Ensure compliance with the requirements of the regulatory bodies that have jurisdiction over electricity meters installed within Ergon Energy s distribution network including: Queensland Competition Authority [QCA] / Australian Energy Regulator [AER] Australian Energy Market Operator [AEMO] National Measurement Institute [NMI] 2. RESPONSE Any response, comments, or feedback relating to this document may be directed to the Responsible Person for Ergon Energy. 3. INSTALLATION HISTORY The meters currently being installed by Ergon Energy in its Network are electronic meters as per the Metrology Procedure Part A and these meters are capable of capturing interval data. 3.1 METERS CURRENTLY BEING INSTALLED BY ERGON ENERGY Single phase direct connected EM1000, EM1200 (L+G), MK7 (EDMI) Multi-phase direct connected MK10, MK10A LV CT connected meter- MK10E HV CT connected MK3, MK10E Table 1 Quantities and type of meters that are installed in the Network as at June Asset Class No of Units Single phase electromechanical 1,070,538 Single phase electronic (1 and 2 element) 116,156 Card Operated Meters (1 and 2 element) 4,372 Three phase electromechanical 13,120 Three phase electronic 30,795 LV CT Electronic meters (Tier 1+2) 1 8,528 HV Customer Electronic Meters 116 HV Wholesale Electronic meters (most sites have check meters) 2 93 Total Meters 1,243,718 Time Switches Est. 3 10,604 Ripple Control Receivers 414,610 LV Current Transformers 25,584 1 Quantity varies due to Market transfers and changes to nominated MP Tier in DNSP area 2 Ergon Energy LNSP Ownership 19 Sites Meter VT/CT (RP/MP responsibility), 51 CT and VT only, 6 VT only. 3 Estimated numbers remaining in the network Check this is the latest Process Zone version before use. Page 1 of 22 Meter Asset Management Plan 3.2 REVISED AGE PROFILES (AT JUNE 2012) Age profiles are shown for the following categories. Figure 1- Single phase electromechanical and electronic meters Figure 2 -Three phase electromechanical and electronic Figure 3 - Receivers Single Phase Meter Age Profile Card Operated Meters Meters 1 Phase Electronic (1 + 2 Element) Meters 1 phase Mechanical No of Meters Year - Age Figure 1 : The age profile of single phase electromechanical meters Check this is the latest Process Zone version before use. Page 2 of 22 Meter Asset Management Plan Three Phase Meter Age Profile Meter 3 Phase Electronic Meter 3 Phase Mechanical 5000 No of Meters Year - Age Figure 2 : The age profile of Three Phase Meters Ripple Receiver Age Profile CA Recievers FN Receivers MK Recievers NO Receivers SW Receivers Quantity Year - Age Figure 3 : The age profile of Ripple Control Relays Check this is the latest Process Zone version before use. Page 3 of 22 Meter Asset Management Plan Electronic meters that have been removed from service due to tariff upgrades, or other project related work may be returned to service if they are deemed suitable and compliant with the National Measurement Institutes verification process. Currently Ergon Energy is only refurbishing the following meter families: EM1000 Single Phase meters EM1200 Two element single phase meters MK7A Two element single phase meters MK7C Single phase meters MK10A,Q4 Three phase direct connect meters MK3, Mk10E Three phase CT meters 4. ERGON ENERGY S METERING CAPABILITY Ergon Energy s Distribution Network Service Provider [DNSP] is currently accredited as Meter Provider B [MPB] in the Metering Provider classification which entitles its Metering Group to do the following as outlined in Table 2. Ergon Energy DNSP is also the Responsible Person (RP) for all 1 st Tier and 2 nd Tier small customer 4 metering in the Ergon Energy Distribution Network area. Table 2 Metering Operational Competency Category 1C 1V 1M 1A 2C 2V 2M 2A 3M 3A 4M L 5B 6B Competency Class 0.2 CTs with 0.1% uncertainty. Class 0.2 VTs with 0.1% uncertainty. Class 0.2 Wh meters with 0.1/cosφ% uncertainty and class 0.5 varh meters with 0.3/sinφ uncertainty Class 0.2 CTs, VTs, Wh meters; class 0.5 varh meters; the total installation to 0.5%. Wh with 0.2% uncertainty at unity power factor; 1.0% for varh with 0.4% uncertainty at zero power factor. Class 0.5 CTs with 0.2% uncertainty. Class 0.5 VTs with 0.2% uncertainty. Class 0.5 Wh meters with 0.2/cosφ uncertainty and class 1.0 varh meters with 0.4/sinφ uncertainty. Class 0.5 CTs, VTs, Wh meters; class 1.0 varh meters; the total installation to 1.0%. Wh with 0.4% uncertainty at unity power factor; 2.0% for varh with 0.5% uncertainty at zero power factor. Class 1.0 Wh meters with 0.3/cosφ% uncertainty and class 2.0 varh meters with 0.5/sinφ% uncertainty Class 0.5 CTs, VTs, class 1.0 Wh meters; class 2.0 varh meters; the total installation to 1.5%. Wh with 0.5% uncertainty at unity power factor; 3.0% for varh with 0.6% uncertainty at zero power factor. Class 1.0 Wh meters and class 1.5 Wh Meters with 0.3/cosφ% uncertainty. Approved Communication Interface Installer Class 1.0 and class 1.5 whole current or CT connected Wh meters with 0.3/cosφ% uncertainty Class 1.5 whole current or CT connected Wh meters with 0.3 /cosφ% uncertainty 4 A small customer having energy usage of less than 100 MWh pa Check this is the latest Process Zone version before use. Page 4 of 22 Meter Asset Management Plan 5. MAMP REVIEW PERIOD The MAMP is a dynamic living document, and is reviewed annually by the Principal Engineer Metering in consultation with Ergon Energy s Network Monitoring & Processing group on behalf of the RP. This review will be co-ordinated with the Regulatory Information Notice (RIN) data submission. Where significant changes are reflected in the MAMP a copy will be submitted to AEMO for re-approval. 6. METER MANAGEMENT PLAN & STRATEGY 6.1. HV METERING EQUIPMENT Routine tests are programmed for all sites where Ergon Energy MPB is designated as the responsible participant. Ergon Energy MPB on request from other RP s or other relevant market participants may carry out routine tests on the metering assets on a fee for service basis under its relevant accreditation capability. These sites will not be covered by this document HV VOLTAGE TRANSFORMERS Ergon Energy s strategies for high voltage instrument transformer testing are in accordance with Schedule 7.3 of the NER i.e. Tests are to be completed on a routine test period of 10 years (Subject to reasonable endeavours to negotiate and arrange outages with customers to gain access to the metering VTs) TYPE OF TEST Voltage transformers will be primary injection tested as per Schedule 7.3 of the NER PERIOD AND TEST VOLUMES PER YEAR All high voltage and wholesale meter installation maintenance is scheduled from the meter asset register (Ellipse) via Maintenance Schedule Task (MST) activities based on the following time frames: 2.5 Yearly Inspection 10 yearly VT accuracy test Currently Ergon Energy is testing approximately 30 5 sites per year so that all the high voltage transformers, Ergon Energy are responsible for complies with NER chapter HV CURRENT TRANSFORMERS Ergon Energy s strategy for high voltage current transformer testings shall be in accordance with Schedule 7.3 of the NER i.e. Tests will be completed on a routine test period of 10 years (Subject to reasonable endeavours to negotiate and arrange outages with customers to gain access to the metering CT s.) TYPE OF TEST The current transformers will be tested by either of the following methods whichever is deemed the easiest and safest method to test. This will be influenced by access to the primary conductors. Primary injection testing as per Schedule 7.3 of the NER. Secondary injection testing using an Omicron CT analyser. 5 This will be reviewed annually to align with all sites falling in compliance with its test plans Check this is the latest Process Zone version before use. Page 5 of 22 Meter Asset Management Plan PERIOD AND TEST VOLUMES PER YEAR All high voltage and wholesale meter installation maintenance will be scheduled from the meter asset register (Ellipse) via Maintenance Schedule Task (MST) activities based on the following time frames: 2.5 Year Inspection 10 yearly CT accuracy test. Currently Ergon Energy is testing 30 sites per year 6 so that all the all the high voltage current transformers, Ergon Energy is responsible complies with NER chapter TYPE 1 3 ENERGY METERS Ergon Energy s strategy for maintaining meters driven by instrument transformers will be in accordance with Schedule 7.3 of the NER TYPE OF TEST All meters used for Type 1-3 installations are electronic four quadrant meters which are direct injection tested as per Schedule 7.3 of the NER PERIOD AND TEST VOLUMES PER YEAR All high voltage and wholesale meter installations that Ergon Energy is responsible for will be scheduled from the meter asset register (Ellipse) via maintenance schedule task (MST) activities based on the following time frames: 2.5 Yearly Inspection 5 Yearly meter accuracy Currently Ergon Energy is testing approximately 30 sites per year 7 so that all meters are tested in accordance with this MAMP and complies with Schedule 7.3 of the NER LV METERING EQUIPMENT CURRENT TRANSFORMERS (LOW VOLTAGE) LV CT Ergon Energy s strategy for LV CTs is to schedule tests on all CTs it is responsible for every 10 years using the following test methodology: In-situ testing of CTs performed using an Omicron CT Analyser; Test any removed CTs with an Omicron CT analyser to supplement test results for family types; Schedule approximately 10 per cent of the CT population to be tested annually which aligns for the whole fleet of LV CTs to be tested in a 10 year cycle; CTs tested in a 10 year cycle; CTs admittance to be tested at site during the installation and commissioning of installation; and CT burden checks. Note: Ergon Energy is participating in the Current Transformer Testing Working Group (CTTWG) with other Responsible Person s and Meter Providers where these assets are the focus of the AER (Compliance Bulletin #6 issued December 2011). The results of testing over the next 12 months may allow the acceptance of an alternate sampling based CT test plan instead of the current time based maintenance requirement. Ergon Energy will continue with time based CT maintenance testing. Should Ergon Energy seek to use an alternate sampling based CT test plan AEMO s approval will be requested as an amendment to this MAMP. 6 This will be reviewed annually to align with all sites falling in compliance with its test plans 7 This will be reviewed annually to align with all sites falling in compliance with its test plans Check this is the latest Process Zone version before use. Page 6 of 22 Meter Asset Management Plan TYPE OF TEST Secondary injection testing will be utilised for testing all LV CTs and the CTs will be tested in the following manner: In field testing; In-house testing in the Ergon Energy laboratory 8. CT Count by Type Low Voltage CTs Quantity /5 Ext Range EC 200/5 Ext Range GEC 200/5 Ext Range Nilsen 200/5 Ext Range 800/5 Ext Range EC 800/5 Ext Range Nilsen 1500/5 Ext Range Family Types 1000/ /300/ 200/400/ 400/800/ 0/3000/5 600/5 EC 800/5 EC 1200 EC EC 400/800/ 1200 Nilsen Low Voltage CTs Other Unidentifi ed types Figure 4 : Low Voltage CT quantities by family type as at June PERIOD AND TEST VOLUMES PER YEAR The formal testing of LV CTs commenced late in 2008 after the submission of the initial Ergon Energy MAMP. The initial plan included a 2 year ramp up period while test equipment and procedures were established. The CT testing work plan quantities can be impacted significantly due to transfers of sites between Meter Providers. A CT Meter Upgrade plan over the past 10 years has resulted in the elimination of many old CT types; with over 80% of all in-service LV CTs being 200/5 Ext range types (See Figure 4). The formal plan is to continue testing all CTs once every 10 years. Table 3 shows the number of CTs tested till June Table 3 Test volumes as at June 2012 Total Installation on the lodgement of the initial MAMP (8455 Installation) Number of sites to be Tested on the lodgement of initial MAMP Number of sites Completed First Year ( ) Second ( ) Third Year ( ) Fourth Year ( ) Fifth Year ( ) For CTs that are being removed from the network and deemed suitable for refurbishment or form part of a sample set Check this is the latest Process Zone version before use. Page 7 of 22 Meter Asset Management Plan 6.6. TYPE 4 6 ENERGY METERS CURRENT TRANSFORMER CAPABLE METERS Ergon Energy s strategy for maintaining meters driven by current transformers is in accordance with Schedule 7.3 of the NER DIRECT CONNECT METERS Ergon Energy s test strategy for direct connected metering is to use sampling plans based on Australian AS Electricity Metering In-service Compliance Testing and Clause 2.7 of the National Metrology Procedures. Ergon Energy will utilise sample testing by attributes as specified in AS Sample testing is based initially on total estimated family populations by meter types across Ergon Energy. This includes initial verification testing of new patterns or types of meters (including a variant to existing pattern or type) as they are added to the meter fleet. If sample testing fails on a total family of meters, the family will be str
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