电力系统自动化2017，Vol.41Issue(19)：110-119,10.DOI:10.7500/AEPS20170109008
电容中点式三相四线制SAPF混合无源非线性控制策略
Nonlinear Control Strategy of Three-phase Four-wire Shunt Active Power Filter with Mid-point Capacitor Based on Hybrid Passive Theory
摘要
Abstract
The three-phase four-wire shunt active power filter (SAPF) with mid-point capacitor can be used to compensate for all harmonics,zero sequence and reactive current of the nonlinear load no matter whether the power system is balanced or unbalanced because of the additional path for zero sequence current compared to three-phase three-wire SAPF.Control of SAPF via the nonlinear passive controller by using its passivity can yield a better compensating effect than the conventional linear and nonlinear controller.And there is no need of detection and treatment of the positive and negative sequence components of all harmonics when the power system is unbalanced.A hybrid passivity-based control (PBC) strategy of mid-point capacitor three phase four-wire SAPF is proposed.Firstly,according to the Euler-Lagrange mathematical model of the controlled object in the dq0 coordinate system,the passivity of the SAPF is analyzed,and the passive control law of the inner-loop current of SAPF able to make the controlled quantity converge to the expected value is obtained.Secondly,the damping injection method is used to simplify the design of the system,and the new passive control law capable of completely decoupling the compensation current of the inner-loop is obtained as an improvement on the dynamic performance of the system.Thirdly,the outer-loop voltage controller of SAPF based on the 2-order low-pass filter is designed according to the close relation between the total and differential voltage at the DC side and compensating current.Finally,the feasibility and superiority of applying hybrid PBC to SAPF is verified by Simulink software simulation and experiment.Compared with the traditional PI control,the control method proposed in this paper has a faster response speed and better compensation effect.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/无源控制/2阶低通滤波控制Key words
shunt active power filter (SAPF)/three-phase four-wire/mid-point capacitor type/unbalanced power grid/passivity-based control (PBC)/2-order low-pass filter control引用本文复制引用
张宇,程启明,程尹曼,谭冯忍,高杰,余德清..电容中点式三相四线制SAPF混合无源非线性控制策略[J].电力系统自动化,2017,41(19):110-119,10.基金项目
国家自然科学基金资助项目(61573239) （61573239）
上海市重点科技攻关计划资助项目(14110500700).本文研究得到上海市电站自动化技术重点实验室项目(13DZ2273800)的资助,谨此致谢!This work is supported by National Natural Science Foundation of China (No.61573239) and Key Science and Technology Plan of Shanghai Science and Technology Commission (No.14110500700). （14110500700）
