采用扰动观测器的SVG直接电流反步控制  

Direct Current Backstepping Control of SVG with Disturbance Observer

作　　者：刘玉琦 王丹 彭周华 刘陆 周鑫 LIU Yuqi;WANG Dan;PENG Zhouhua;LIU Lu;ZHOU Xin(Marine Electrical Engineering College,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学船舶电气工程学院,大连116026

出　　处：《电力系统及其自动化学报》2021年第6期15-21,共7页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(61673081,51979020,51909021,51579023,51939001);中国博士后科学基金资助项目(2019M650086);大连市杰出青年科技人才计划资助项目(2018RJ08);交通运输部高层次人才计划资助项目(2018-030);中央高校基本科研业务费资助项目(3132019319);国家重点研发计划重点专项资助项目(2016YFC0301500);大连海事大学博士生创新资助项目(BSCXXM010)。

摘　　要：电网负载的多样性以及结构复杂性,降低了电力系统的功率因数。静止无功发生器SVG作为无功补偿的重要设备,对提高功率因数具有重要意义。本文采用了电压外环与电流内环级联的结构,使用扰动观测器DO对外部扰动和参数不确定构成的合成干扰项进行估计。基于DO观测的扰动信息分别设计出直流电压控制器和无功电流控制器。最后使用Lyapunov函数证明了控制系统是输入状态稳定的。仿真结果表明,采用的基于DO直接电流反步控制方法的SVG,在实现补偿负载无功功率的同时,还具有良好的抗扰动以及动态响应性能。With the increasing diversity and structural complexity of grid load,the power factor of power system is re⁃duced.As important equipment for reactive power compensation,static var generator(SVG)is of significance to im⁃proving the power factor.In this paper,the voltage outer loop cascaded with the current inner loops is adopted,and a disturbance observer(DO)is used to estimate the composite uncertainty consisting of external disturbance and parame⁃ter uncertainties.Based on the disturbance information observed by the DO,a DC voltage controller and a reactive cur⁃rent controller are designed separately.At last,it is proved that the input to the control system is in stable state by con⁃structing Lyapunov functions.Simulations are carried out using the proposed method,and results show that the SVG with DO-based direct current backstepping control has satisfying anti-disturbance capability and dynamic response per⁃formance while realizing the compensation for the reactive power of load.

关 键 词：静止无功发生器 反步法 扰动观测器 无功功率 级联控制 

分 类 号：TM761.1[电气工程—电力系统及自动化]