Third Benchmarking Report on Quality of Electricity Supply

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2.2.1 Continuity measurement systemsAs described in Chapter 1, there is a widespread commitment by regulators to regularly monitoractual levels of continuity of supply, by collecting data from distribution and transmission companies,and to publish the data for benchmarking (Table 2.1). The most common indicators areSAIDI and SAIFI for long interruptions (duration > 3 minutes) for distribution and ENS and AIT fortransmission. Usually both planned and unplanned interruptions are monitored separately.Concern for planned interruptions on the part of the regulator is motivated by the fact that evenplanned interruptions have a cost for consumers. As long as they are informed in advance, however,they will be able to reduce their outage costs and inconvenience.At present, very few regulators have data on the number of short interruptions (duration < 3 minutes).However, it is clear that regulators are increasingly concerned about short interruptions asthey become increasingly relevant to business customers. Monitoring short interruptions requiresattention to technical details and is, naturally, the prerequisite for setting regulatory standards.It was rather clear from the survey that significant differences exist with regard to accuracy andcompleteness in the measurement and registration of the data. This diversity makes it difficult,even today, to fairly compare numerical values. One example for all is the measurement of interruptionsoriginated on LV circuits. Where these are not measured (more than half of the countriessurveyed), the number and duration of interruptions actually experienced by consumers will beworse than indicated in the reported data.TABLE 2.1MONITORING AND COMMUNICATION OF CONTINUITY INDICATORSMeasure long Measure Measure separately Voltage level Information to Publicationinterruptions short int's planned/unplanned regulatorAT ✓ ✓ HV, MV Yearly ✓BE ✓(>15' in LV) ✓ HV, LV YearlyCZ ✓ ✓ HV, MV, LV Yearly ✓EE ✓ ✓ HV, MV Yearly ✓ES ✓ ✓ HV, MV Yearly ✓FI ✓ ✓ ✓ HV, MV, LV Yearly ✓FR ✓ ✓ ✓ HV, MV, LV Yearly ✓GB ✓ ✓ ✓ HV, MV, LV Yearly ✓GR ✓ ✓ HV, MV, LV Yearly ✓HU ✓ ✓ ✓ HV, MV, LV Yearly ✓IE ✓(>1') ✓(>1') ✓ HV, MV Yearly ✓IT ✓ ✓ ✓ HV, MV, LV Yearly ✓LT ✓ ✓ HV, MV, LV Quarterly ✓LV ✓ HV, MV Yearly ✓NO ✓ ✓ HV, MV Yearly ✓POPT ✓ ✓ HV, MV, LV Quarterly ✓SI some data available some data available some data available HV, MV upon request ✓SE ✓ ✓ HV, MV Yearly ✓33<strong>Third</strong> <strong>Benchmarking</strong> <strong>Report</strong> on Quality of Electricity Supply – 2005 · Chapter 2
Comparison of data across countries is made inherently difficult by the fact that performancesvary substantially even among companies and within the same company. As suggested by Ofgem,factors that influence performance can be grouped into three classes:· Inherent factors such as weather conditions, geography and population density of a particular area;· Inherited factors such as the design of the network at the starting moment of incentive regulationand/or privatisation (e.g. some companies or areas may have long, predominantly overheadcircuits, whilst others may have more underground lines). It takes a long time and significantcapital expenditure to fundamentally alter network design;· Incurred factors such as managerial performance, how well assets are maintained, and howeffectively resources are used.Reliable and robust data is crucial for incentive regulation on continuity. On the one side, it clearlyemerged from the survey that the majority of regulators have not established or approved rulesfor recording interruptions (see Table 2.2). On the other hand, measurement protocols are generallyfound in almost all of the eight countries where an incentive/penalty regime is implemented(not in all countries that have set continuity standards at system- or customer-level). These protocolsrequire companies to measure and analyse data in a manner that is consistent with regulatorypurposes, enable the regulator to control the registration process, and give credibility and fairnessto financial incentive regimes. The most critical issues in measurement protocols that affectthe implementation of incentive/penalty regimes are classification of causes (in particular forcemajeure: this is defined in the great majority of countries, see Annex 2.1), and identification of thenumber of consumers affected by the interruptions (or its estimate).TABLE 2.2RECORDING, AUDITS, AND QUALITY REGULATIONRules for recordinglong interruptionsClassify interruptionswith causesDefinition of ForceMajeureAuditsContinuitystandards*Incentive/penaltyregimeAT ✓ ✓ ✓BE ✓ ✓ ✓CZ ✓ ✓ ✓ ✓EE ✓ ✓ ✓ES ✓ ✓ ✓ ✓ ✓FI ✓ ✓FR ✓ ✓ ✓ ✓GB ✓ ✓ ✓ ✓ ✓GRHU ✓ ✓ ✓ ✓ ✓ ✓IE Not regularly ✓ ✓IT ✓ ✓ ✓ ✓ ✓ ✓LT ✓ ✓ ✓LVNO ✓ ✓ Proposal ✓POPT ✓ ✓ ✓ ✓ ✓ ✓SI✓SE ✓ ✓ ✓34* any type of standards, at system level or at single-customer level.Council of European Energy Regulators – Ref: C05-QOS-01-03
Page 1: Council ofEuropeanEnergyRegulatorsT
Page 4: Council ofEuropeanEnergyRegulatorsE
Page 10: CHAPTER 1 - Continuity of SupplyCON
Page 13 and 14: ··utes are defined as “short in
Page 15 and 16: interruptions is very small. AIT is
Page 17 and 18: Interruptions shorter than three mi
Page 19 and 20: 1.6.1 Weighting methods used for co
Page 21 and 22: ADDITIONAL INFORMATION 1.3 - NOTICE
Page 23 and 24: and in Italy the integration of the
Page 25 and 26: 1.6.3 Rules for recording short int
Page 27 and 28: ADDITIONAL INFORMATION 1.8 - AUDITS
Page 29: SAIDI1.7.1 Unplanned SAIDI not attr
Page 34 and 35: FIG 1.7 UNPLANNED INTERRUPTIONS Sho
Page 36: ···There is some evidence to sup
Page 40 and 41: THE USE OF STANDARDS AND INCENTIVES
Page 44 and 45: Almost all countries having adopted
Page 46 and 47: 2.2.3 Findings I: Quality measureme
Page 48 and 49: The incentive is symmetric and rela
Page 50 and 51: In Sweden, a quality of supply inde
Page 52 and 53: Regulators’ concern with the vola
Page 54 and 55: In Great Britain the regulator (Ofg
Page 56 and 57: ··A regime to avoid overquality i
Page 58 and 59: ··gets”; introduction of an upp
Page 60 and 61: FIG 2.4/b CONVERGENCE EFFECT OF THE
Page 62 and 63: 2.4 Continuity standards at single-
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Page 70 and 71: E SIStandard for long interruptions
Page 72: introduce single-customer standards
Page 76 and 77: STANDARDS IN COMMERCIAL QUALITY REG
Page 78 and 79: Commercial quality regulation attem
Page 80 and 81: The evaluation of the actual level
Page 82 and 83: TABLE 3.5MOST FREQUENTLY USED COMME
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Quest.2.1.23Supp.0Recomm.✰✰✰D
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answered (for instance Portugal and
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countries who supplied data have a
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metering problems, customer’s que
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step. CEER recommends that member s
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CHAPTER 4 - Voltage Quality Monitor
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For the rest of the voltage quality
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·In Czech Republic a monitoring sy
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tion point of single customers: in
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ADDITIONAL INFORMATION 4.2 - POWER
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ator must advise clients connected
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ADDITIONAL INFORMATION 4.3 - CUSTOM
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mandatory such values are applicabl
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ANNEXES - ANNEX TO CHAPTER 1.Sectio
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Appendix - BELGIUM - Wallonia1. Acc
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(CONTINUE) SECTION 2 - PLANNED INTE
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TABLE 3.4 - UNPLANNED INTERRUPTIONS
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TABLE 3.10 - ENERGY NOT SUPPLIED AS
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TABLE 4.2 - VOLTAGE LEVEL ANALYSIS
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The classification of continuity da
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The same pattern emerges with the i
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ANNEX TO CHAPTER 2.Annex 2.1 - Comp
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Quest.2.1.18Supp.0Recomm.✰✰DSO5
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Quest.1.1.9Supp.0Recomm.✰✰✰DS
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3.3.10.4 HungarySupply level in the
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TABLE 3.2INDICATORS1.1.1. Average w
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TABLE 3.3.AINDICATORS2.1.1. Respond
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TABLE 3.3.BINDICATORS2.1.1.Respondi
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TABLE 3.4INDICATORSAustriaBg Flande
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TABLE 3.6 ESTIMATING CHARGES (WORKI
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TABLE 3.10 CONNECTING (SUPPLY AND M
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TABLE 3.14 AVERAGE TIME TO PROVIDE
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TABLE 3.18 METER PROBLEMS (WORKING
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TABLE 3.22 RESPONSE TO CUSTOMER LET
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TABLE 3.27 AVERAGE WAITING TIME IN
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TABLE 3.32 NUMBER OF COMPLAINTS PER
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TABLE 3.38PREPAYMENT METER FAULT (W
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TABLE 3.43NUMBER OF REVISED BILLS P
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ANNEX TO CHAPTER 4.ANNEX 4.1 Voltag
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TABLE 2: NORWAY: Flicker severity l
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TABLE 5: PORTUGAL: for EHV and HV,
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Third Benchmarking Report on Quality of Electricity Supply

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