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Design of Static Var Compensator Based on Fuzzy-PI Control

Author: DaiYuanHai
Tutor: PengJianChun
School: Hunan University
Course: Proceedings of the
Keywords: Static var compensator Fuzzy-PI control Reactive power compensation Instantaneous reactive power theory DSP
CLC: TM761.1
Type: Master's thesis
Year: 2009
Downloads: 363
Quote: 3
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Abstract


With rapid economic development, there is higher and higher demand for power quality.Custom Power technology, which is a new area of research in power system, will be an effective way to improve the power quality of distribution network in the future. Static Var Compensator (SVC), which can replace conventional voltage and reactive power control device and is more powerful and fast, is an important Custom Power device. Now were hotly studied.In all of families of SVC, FC-TCR is one type of them, whose ratio of cost and performance has very high correspondingly. It can track the loads’running change automatically; adjust the TCR’s capacity output by controlling the thyristors’ passing angle continuously. It can have good effects in the terns of improving the loads’ power factor, stabilizing and balancing voltage. Based on the design of SVC, control strategy, hardware and software design methods and key technology for dynamic reactive power compensation were studied.The basic tenet of SVC of the type FC-TCR was expounded first of all. In order to achieve the objectives of dynamic reactive power compensation for loads and stabilizing node voltage, the Fuzzy-PI control method was proposed.Based on different status, switch control strategy between fuzzy control and PI control to achieve a better compensation effect. For the realization of fuzzy-PI control, it is needed to accurately detect the compensation signal, this paper adopted a reactive detection methods based on instantaneous reactive power theory.To verify the validly of the proposed control method, the SVC simulation model based on MATLAB was built. Simulation results show that the SVC based on the proposed control method can achieve the objectives of dynamic compensation for loads and improving voltage quality.In the end, based on the above theory and technology, the particular design process of the SVC based on DSP (TMS320F2812) controller was introduced. Software and hardware design of the SVC was expatiated in the paper. Related important design datum and principle were analyzed.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Automatically adjusts > Automatic adjustment of voltage and reactive power
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