李征南,唐忠,史晨豪,陈寒.基于PCHD模型的MMC-APF无源控制策略[J].电测与仪表,2024,61(2):173-178. LI Zhengnan,TANG Zhong,SHI Chenhao,CHEN Han.Passivity-based control strategy of MMC-APF based on PCHD model[J].Electrical Measurement & Instrumentation,2024,61(2):173-178.
基于PCHD模型的MMC-APF无源控制策略
Passivity-based control strategy of MMC-APF based on PCHD model
由于无源滤波器只能消除特定次谐波，传统有源电力滤波器耐压水平较低，使其只能应用在低压配电网，同时由于电平数较少导致补偿精度受限。文中选择基于(Modular Multilevel Converter，MMC)的有源电力滤波器为研究对象，同时利用MMC-APF的无源性提出一种基于端口受控耗散哈密顿(Port-controlled Hamiltonian with Dissipation, PCHD)模型的非线性无源控制策略(Passivity-Based Control, PBC)。通过MMC-APF系统的数学模型推导出基于PCHD的无源模型；利用互联法和阻尼分配法设计了相应的无源控制器；通过子摸块电容、环流控制、无源控制得到系统调制信号。仿真结果表明，设计的基于PCHD模型的PBC策略能够将系统控制在较低的谐波标准下，相较于传统PI控制策略具有更好的谐波补偿性能和更快的响应速度。
英文摘要:
Because passive filters can only eliminate specific harmonics, traditional active power filters can only be used in the low-voltage distribution network due to low voltage withstand level, and the compensation accuracy is limited due to low level, the active power filter based on modular multilevel converter (MMC) is selected as the research object. Meanwhile, a nonlinear passive control strategy based on port-controlled Hamiltonian with dissipation (PCHD) model is proposed by using the passivity of MMC-APF. The passive model based on PCHD is deduced through the mathematical model of MMC-APF system. The passive controller of the system is designed by means of interconnection and damping distribution. The system modulation signal is obtained by means of sub-block capacitance, circulation control and passive control. The simulation results show that the passive control strategy based on PCHD model designed in this paper can control the system under lower harmonic standards, and has better harmonic compensation performance and faster response speed than the traditional PI control strategy.
