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Fuzzy Logic Based Power Flow Control Analysis of Advanced Unified Power Flow Controller



Author(s)

S.K. Srivastava¹ and S.N. Singh²

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DOI:10.17265/1934-8975/2011.03.009

1. Department of Electrical Engineering, MMM Engineering College, Gorakhpur-273010, India
2. Department of Electrical Engineering, Indian Institute of Technology Kanpur-208016, India

Due to rapidly development of high power semiconductor devices with fast control features have made possible to control the power flow more efficiently and effectively. The Flexible AC Transmission Systems (FACTS) in this category introduces several innovative operating control devices. One of the recent devices is Advanced Unified Power Flow Controller (AUPFC) or multi-converter UPFC, which can control bus voltage and real and reactive power flows of more than one line or even a sub-network. This paper presents performance analysis of AUPFC based on d-q axis model theory. Based on the analysis, a new fuzzy logic rules based control algorithm has been developed in this paper which improves the system performance. The control rules are structured depending upon the relationship between series inserted voltages in multi-line and the desired changes of real and reactive power flows in the control network. The impacts of different controllers along with parameters of series connected transformers and transmission lines have been investigated through developed control block models in SIMULINK. The effectiveness of the proposed scheme is demonstrated by a case study.

FACTS, AUPFC, multi-converter, UPFC, fuzzy-PI controller, SIMULINK, FLC.