电容中点式三相四线制SAPF基于PCHD模型的无源控制策略  

Passivity-based Control Method of Mid-point Capacitor Three-phase Four-wire Shunt Active Power Filter Based on PCHD Model

作　　者：何睿钦 杨宁 崔承刚 郭卫民 陈辉 HE Ruiqin;YANG Ning;CUI Chenggang;GUO Weimin;CHEN Hui(College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Electric Power Research Institute of State Grid Henan Electric Power Company,Zhengzhou 450052,China)

机构地区：[1]上海电力学院自动化工程学院,上海200090 [2]国网河南省电力公司电力科学研究院,郑州450052

出　　处：《高电压技术》2018年第10期3266-3274,共9页High Voltage Engineering

基　　金：国家自然科学基金(51607111);上海市科委地方院校能力建设项目(15160500800);上海高校青年教师培养资助计划(ZZsdl15142)~~

摘　　要：针对三相三线制并联型有源滤波器（SAPF）在电网不平衡时需对正、负、零序分量进行分别控制等缺点,选择电容中点式三相四线制SAPF为研究对象,同时利用其无源性提出一种基于端口受控耗散哈密顿（PCHD）模型的非线性无源控制策略。首先,根据被控对象在dq0坐标系下的数学模型得到其PCHD数学模型;然后,采用互联和阻尼分配（IDA）法设计了SAPF的无源控制器;最后,根据直流侧的总电压和差压对补偿电流有所影响,设计了基于PI控制的SAPF外环电压控制器。仿真及实验结果表明,所设计的基于PCHD模型的电容中点式三相四线制SAPF能够实现电网平衡/不平衡情况下的电流低谐波、直流侧电压稳定及中点电压平衡;同时,与传统的双环PI控制策略相比,具有较好的补偿效果和响应速度。It is required for a three-phase three-wire shunt active power filter（SAPF） to control the positive, negative and zero sequence components respectively when the power grid is not balanced, therefore, taking the mid-point capacitor three-phase four-wire SAPF as the research object, we proposed a nonlinear passivity-based control（PBC） strategy based on port-controlled hamilton with dissipation（PCHD） model by using its passivity.Firstly, according to the mathematical model of the controlled object in the dq0 coordinate system, the PCHD model was obtained. Then, the passive controller of SAPF was designed by an interconnection and damping assignment（IDA） method. Finally, the outer-loop voltage controller of SAPF based on PI control was obtained according to the close connection between the total and differential voltages of the DC side and compensating current. Simulation and experimental results show that the mid-point capacitor three-phase four-wire SAPF based on PCHD model designed in this paper can realize low harmonic current, DC side voltage stability and neutral-point voltage balance on the condition of balanced or unbalanced grid;compared to the traditional PI control, the proposed control method has a better compensation effect and faster response speed.

关 键 词：并联型有源滤波器 三相四线制 电容中点式 电网不平衡 端口受控耗散哈密顿模型 互联和阻尼分配 

分 类 号：TM761[电气工程—电力系统及自动化]