基于比例控制和改进重复控制的SVG系统

SVG System Based on Proportional Control and Improved Repetitive Control

作为静止无功发生器(SVG)无功功率补偿的关键,各种新型电流控制器被不断提出和改进。重复控制有优秀的稳态性能,但响应速度慢。在重复控制器与比例控制器相结合的复合控制器的基础上,对重复控制器加以改进,增强了控制器的稳态精度和响应速度。此复合控制器结合比例控制和重复控制的优点,提高了系统的稳态和动态性能,能有效改善系统的无功补偿准确度,改善补偿电流的波形质量。在此基础上进行仿真建模和实验研究,仿真和实验结果验证了所提控制策略的有效性和可靠性。

As key of static var generator(SVG)compensation,various new current controllers are continually raised and improved.Repetitive control has a good steady-state performance,but the response is slow.On the basis of compound controller combined repetitive controller and proportional controller,the repetitive controller was improved to enhance its steady-state accuracy and response speed.Combined with advantages of proportional control and repetitive control,this compound controller enhanced the steady-state and dynamic performances of SVG system.It could also improve accuracy of reactive power compensation and waveform quality of compensation current effectively.The modeling simulation and experiment were completed,and the results verify the validity and reliability of the proposed control strategy.