摘要
随着电力电子器件和各种非线性设备的使用,以及用户对电能质量要求的不断提高,电能质量中的无功补偿问题显得越来越重要。静止无功发生(STATCOM)作为电力系统动态无功补偿的有效装置,因其性能优越,已经成为无功功率补偿技术的研究热点和重要发展趋势。首先简要介绍了无功补偿装置的发展和工作原理,其次分析了STATCOM主电路的结构,对STATCOM的工作原理进行了研究,建立了STATCOM的动态数学模型,并进行了稳定性分析。然后,研究了STATCOM的两种控制方法。与电流间接控制方式相比,电流直接控制电流方式在电流跟踪速度,控制精度等方面更具有优势。
With the use of power electr onic devices and non linear equipme nt,as well as the continuous improveme nt of users for the power quality,the reactive power compensation problem of the power quality appears more and more important.Due to its superior performance,static var generator(STATCOM),an effective device for dynamic reactive power compensation in power system,has become a research focus and an important development tendency of the reactive power compensation technology.This paper first introduces the development and the operating principles of reactive power compensation devices,the main circuit structures of the STATCOM are analyzed.Meanwhile,the operating principle of STATCOM is studied,then the dynamic mathematical model of STATCOM is built,and the stability of STATCOM is analyzed.Thirdly,the control methods are studied.The direct current control method has the advantages over current tracking speed and control precision,compared with the indirect current control method.Therefore,a direct current control method based on dq transformation is adopted,which the voltage feedforward is brought in.
出处
《变频器世界》
2022年第12期118-122,共5页
The World of Inverters
