A Study on Reactive Power and Boltage Control in a Distribution System

• Main Authors: Cheng, Chen-Kuo, 鄭楨國
• Other Authors: Liang, Ruey-Hsun
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/63227068363961799047

碩士 === 國立雲林科技大學 === 電機工程學系 === 87 === 　　The reactive power and voltage control problem in a distribution system is investigated The main purpose is to keep the secondary bus voltage profile at a specified value, and to restrain the reactive power flow into main transformer and to reduce total feeder loss. To reach these objectives, current practice at Taiwan Power Company is to install on load tap changer in a main transformer to adjust the secondary bus, and to place shunt capacitor on the secondary bus to compensate the reactive power flow and to place shunt calpacitor on the feeder. 　　To investigate the reactive power and voltage control problem, the following problem and approaches are proposed 　　1.Fuzzy dynamic programming approach to dispatch of feeder capacitors 　　2.A genetic algorithm to reactive power and voltage control in a distribution substation 　　3.Dynamic programming approach to reactive power and voltage control in distribution system 　　4.A genetic algorithm to reactive power and voltage control in distribution system 　　The constraints that must be considered include maximum allowable number of switching operation in a day for each capacitor and on load tap changer, and the voltage limit on the feeder, and the secondary bus voltage is limited. 　　To demonstrate the usefulness of the proposed approaches, reactive power and voltage control in a distribution system within the service area of Yun-Lin District Office of Taiwan Power Company is performed. It is found that a proper dispatching schedule for each capacitor and under load tap changer can be reached by the proposed methods.