Research and Application of Voltage Quality Evaluation and Control Strategy for Distribution Network

Abstract

Power system aims reliable and high quality power supply, which makes voltage quality essential. This paper at first introduces the existing voltage quality assessment methods and points out its shortcomings. After that, a new voltage quality evaluation method based on probability and statistics is proposed, which is applied to the analysis of voltage monitoring points of Type D (380/220V customer side phase/line voltage points) to overcome these shortcomings. This method adopts continuous evaluation rather than discrete evaluation, which helps to show voltage quality in a more intuitive and reasonable way, providing scientific basis for voltage quality control strategy of distribution network.