Identification, classification and correlation of monitored power quality events

Sensitive customers of electricity have a deep interest in the performance, efficiency, power quality, interchangeability, and safety of electrical operating systems. Standards provide the essential tools that support and complement these interests. They provide economic benefits to the high-tech customers in system design, equipment design, electrical safety, operating performance, energy efficiency, power quality and reliability, and standardisation of products and services. For full utilisation of the guidelines and standards, it is important that the industry use accurate instrumentation to monitor the quality of electricity. This instrumentation must provide `information´ that can be analysed using software to arrive at causes and reasons for power quality events. This paper presents an overview of the current power quality standards. The paper describes the characteristics of PQ events and the specifications of the system required to accurately analyse these. Details of the required monitoring software and hardware are presented