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The Australian Long Term National Power Quality Survey (LTNPQS) is a large multi-utility power quality survey which has now been in operation for 8 years. This paper details the latest innovative developments in the reporting and analysis procedures developed for the LTNPQS. The paper also highlights the key power quality issues affecting Australian electricity networks at the present time. These...
This paper presents an overview of assessment techniques recommended by IEEE Std 519-1992 and the EuroNorm 50160-2009. It also examines reporting requirements for harmonic distortion and voltage fluctuations by the Norwegian NVE 1557 and the Colombian CREG 047 regulations. The paper also presents typical values for harmonic distortion and voltage fluctuations from the three electric utility distribution...
Power quality (PQ) regulation is of great importance due to the economical consequences associated with the presence of the disturbances in power systems. Regulations should provide interventions at the system level (transmission and distribution networks) and the local level at the point of common coupling between utilities and customers. This paper proposes an integrated approach for overall voltage...
The purpose of power quality monitoring is to realizing analyze evaluation and comprehensive treatment. If power quality monitoring data couldn't reflect exactly power quality of real grids, then the following data analyze and research based on the monitoring data is meaningless. This paper analyzed the and actually monitoring data approved the significance of flagging the voltage transient events...
It is difficult to find a reasonable and accepted index to evaluate the comprehensive level of power quality because of the great difference in characteristics and effects among all the individual problems. A new evaluation method is proposed which responses to what the customers care, based on the economical considerations. Example is given to show the advantages of the proposed method, including...
Continuous power quality (PQ) surveys of electricity networks generate large amounts of data that must be condensed for the purpose of interpretation and reporting. In this paper, summary indices for continuous PQ disturbances are calculated from distribution network data, and the relationship between these indices and the known physical characteristics of the site is investigated. Results from this...
The Australian long term power quality monitoring project now involves over 500 sites over 5 years and is one of the largest and longest running in the world. The project necessitated the development of a monitoring strategy, including choosing the number of sites, the type of disturbances to monitor and a means of collecting information from a variety of instruments. The presentation of such a large...
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