Abstract

This paper describes the activities of CIGRE WG C4.27 “Benchmarking of Power Quality Performance in Transmission Systems”. The WG was established in December 2012 in recognition of demand for coherent set of guidelines for benchmarking power quality performance in existing and future transmission networks. During the work the members of the WG have compiled extensive material related to the state of the art of benchmarking power quality performance in transmission systems. This paper summarizes current understanding of benchmarking power quality performance issues and identifies directions in which the WG will continue to work in order to provide resolutions to outstanding questions.

Highlights

  • Power quality benchmarking is receiving growing interest from both transmission companies and electricity regulators

  • This paper presented the results from the work of CIGRE WG C4.27 - Benchmarking of Power Quality Performance in Transmission Systems

  • The working group has addressed and analysed different aspects of PQ performance benchmarking in transmission system

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Summary

Introduction

Power quality benchmarking is receiving growing interest from both transmission companies and electricity regulators. The work described in this paper is aimed at developing guidelines for technical performance benchmarking by combining the input from specialists in CIGRE C4 (System Technical Performance) and C5 (Electricity Markets and Regulation). Technical performance here refers to interruption performance (reliability), availability, voltage dips, and voltage waveform quality (harmonics, unbalance, magnitude, and flicker). The work undertaken by CIGRE C4 [1] identified that various transmission companies are using widely different indices for technical performance reporting, especially in the case of voltage dips, system reliability, and availability reporting. Various commercial benchmarking companies use very different indices, and in some cases the manner in which common indices are defined and applied can vary greatly – making comparisons between performance reported by these different companies difficult. The identification of data that should be excluded from analysis is not consistent among transmission companies, again making comparisons difficult (e.g. third party caused incidents)

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