| At present,due to changing of load structures, using of electrical equipment sensitive to power quality and developing of electricity market, the problems of power quality are paid more and more attention by suppliers and customers. In this paper, the studies include two aspects, statistics and analysis of power quality indexes and a study on the method for energy metering with harmonics. According to Power Quality (PQ) standards which have been published, statistics of indexes of PQ are carried on using data from PQ monitoring devices on-line and with the result conditions of distribution network PQ are decided, which provides bases to improve PQ. A set of software has been programmed with the favor of the Harmonics Management Department of Beijing Electric Supplier Bureau. It can produce a report of harmonic voltage exceeding standard in substation bus bar and a report of capacitor's effect on harmonics. Traditional energy meter can cause errors under the condition of harmonics due to its structural characters, and at the same time harmonic loads take in foundational power and send out harmonic power. This paper proposes a new way and realizes accuracy and fair energy metering.
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