Optimising location of unified power flow controllers by means of improved evolutionary programming

• Published in: IEE proceedings. Generation, transmission, and distribution Vol. 151; no. 6; pp. 705 - 712
• Main Authors: Hao, J., Shi, L.B., Chen, Ch
• Format: Journal Article
• Language: English
• Published: Stevenage Institution of Electrical Engineers 01.12.2004
• Subjects: Applied sciences; Disturbances. Regulation. Protection; Electrical engineering. Electrical power engineering; Electrical power engineering; Exact sciences and technology; Power electronics, power supplies; Power networks and lines; Performance evaluation; Waveform; Adaptive algorithm; Flexible AC transmission systems; Evolutionary algorithm; Power system control; Unified power flow controller; Optimization method; Non linear programming; Steady state; Power flow control; Bus system; Case study; Facility location; Experimental result; Mathematical model; Computing method; Load flow control; Intelligent system
• ISSN: 1350-2360
• DOI: 10.1049/ip-gtd:20041149

The unified power flow controller (UPFC) is one of the most promising Flexible AC Transmission Systems (FACTS) devices for the load flow control. Simultaneous optimisation of location and parameters for UPFCs is an important issue when the given number of UPFCs is applied to the power system with the purpose of increasing system loadability. This paper presents a mathematical model about optimal location and parameters of UPFCs to maximise the system loadability subject to the transmission line capacity limits and specified voltage level. An improved computational intelligence approach: self-adaptive evolutionary programming (SAEP) is used to solve the nonlinear programming problem presented above for better accuracy. Case studies of the IEEE 30- and 118-bus systems using the proposed model and technique demonstrate that the proposed mathematical model is corrective and efficient. Furthermore, steady-state performance of power system can be effectively enhanced due to the optimal location and parameters of UPFCs.