NPC型三电平三相四线制SAPF非线性无源控制策略  

Nonlinear passivity-based control strategy of NPC-type three-level three-phase four-wire SAPF

作　　者：程启明 孙伟莎 程尹曼[2] 张宇 谭冯忍 高杰 CHENG Qiming;SUN Weisha;CHENG Yinman;ZHANG Yu;TAN Fengren;GAO Jie(Shanghai Key Laboratory Power Station Automation Technology Laboratory, College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China;College of Electronics and Information Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]上海电力大学自动化工程学院上海市电站自动化技术重点实验室,上海200090 [2]同济大学电子与信息工程学院,上海201804

出　　处：《电力自动化设备》2019年第2期115-122,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(61573239);上海市重点科技攻关计划项目(14110500700);上海市电站自动化技术重点实验室项目(13DZ2273800)~~

摘　　要：针对线性控制器依赖局部线性化方法的缺点,提出并联型有源滤波器(SAPF)非线性无源控制策略。根据被控对象二极管钳位(NPC)型三电平三相四线制SAPF在dq0坐标系下的欧拉(EL)数学模型分析其无源性;从能量角度出发构造能量存储函数,得到能使被控量收敛至期望值的无源控制规律;以使内环电流解耦为目的,采用阻尼注入法对其简化,提高系统的动态性能;对所设计的NPC型三电平SAPF的非线性无源控制方法进行了仿真及硬件实验。结果表明,所设计的基于非线性无源控制策略的NPC型三电平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;与传统的双环PI控制策略相比,具有较好的补偿效果。A nonlinear passivity-based control strategy of SAPF( Shunt Active Power Filter) is proposed to overcome the shortcoming of linear controllers dependent on local linearization method. Firstly,according to the EL( EulerLagrange) mathematical model of the controlled object in the dq0 coordinate system,the passivity of the NPC( Neutral-Point Clamped)-type three-level three-phase four-wire SAPF is analyzed. Secondly,the energy storage function is constructed,and the passivity-based control law that ensures the controlled quantity converge to the expected value is obtained from the energy point of view. Thirdly,the damping injection method is employed to simplify the design of the system and further improve the dynamic performance of the system,which contributes to the decoupling of innerloop current. Finally,the simulation and hardware experiment of the nonlinear passivity-based control of the proposed NPC three-level SAPF are carried out. Simulative and experimental results show that the proposed NPC-type threelevel SAPF based on nonlinear passive control strategy can effectively achieve low-order harmonic current,DC-side voltage stability and neutral-point voltage balance in cases of both balanced and unbalanced power grids.Meanwhile,compared to the traditional PI control,the proposed control method exhibits a superior compensation effects.

关 键 词：三相四线制系统 并联型有源滤波器 无源控制 欧拉模型 中点电压平衡控制 电网不平衡 

分 类 号：TN713[电子电信—电路与系统]