Feeder Terminal Unit Overcurrent Detecting Curve Optimal Setting Including Transient Situation

• Main Authors: Yu-Chun Chen, 陳裕純
• Other Authors: Chao-Rong Chen
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/q4pjtj

碩士 === 國立臺北科技大學 === 電機工程研究所 === 104 === Fault detection, isolation and restoration of feeder automation system can protect power distribution system. To avoid the blackout region expanded, protection relays are installed and coordinated to isolate the fault area. Feeder terminal unit overcurrent detecting curve is consisting of the fault current and trip time through intelligent electronic device (IED). This curve should be between the IED protection coordination curve and the fuse curve. This paper present a new strategies of the feeder terminal unit overcurrent detecting curve. The flag setting is according to the curve and assist the feeder automation system implement fault detection, isolation, restoration and avoid accident from mistake of branch lines rear of fuses. This paper present an objective function to assess the effectiveness of the flag. Using particle swarm optimization(PSO) to obtain the best position of the flag of current detection curve. PSO uses multi agent strategies, it has the characteristics of memory and non-blind search. With the exchange information from each particle to reach the overall best solution. The new strategy can reduce average 20% area formed by the detected position. The weight setting according to the transient situation. Can reduce transient phenomena cause of the error flag. The new strategies will contribution to feeder automation system FDIR.