CAJ | 학술논문

为了抑制三相并联有源电力滤波器运行过程中参数变化对补偿效果的影响，在对并联型三相电力有源滤波器建模与分析的基础上设计了一种分段趋近律的变结构电流补偿控制策略，在初始阶段变结构控制采用恒指数趋近律以提高系统响应速度，然后采用变指数趋近律使系统进入滑模面，能够有效抑制消除传统变结构控制存在的抖振问题。仿真和实验结果表明，该控制策略对系统扰动不敏感，系统动态响应快，网侧电流为正弦波且基本与电压同相位，波形畸变率低，电流补偿效果明显优于传统变结构控制策略。
위료억제삼상병련유원전력려파기운행과정중삼수변화대보상효과적영향，재대병련형삼상전력유원려파기건모여분석적기출상설계료일충분단추근률적변결구전류보상공제책략，재초시계단변결구공제채용항지수추근률이제고계통향응속도，연후채용변지수추근률사계통진입활모면，능구유효억제소제전통변결구공제존재적두진문제。방진화실험결과표명，해공제책략대계통우동불민감，계통동태향응쾌，망측전류위정현파차기본여전압동상위，파형기변솔저，전류보상효과명현우우전통변결구공제책략。
A piecewise reaching law variable-structure current compensation control strategy was designed based on the modeling and analysis of the three-phase shunt active power filters in order to suppress the influence of the pa-rameter variation on the compensation effect in the operation process of the three-phase shunt active power filters. In the initial stage ,the variable-structure control adopted the constant exponential reaching law to increase the response speed of the system,then the variable exponential reaching law was adopted to make the system convergent to the slid-ing mode surface so that the chattering problem existing in the traditional variable-structure control was effectively e-liminated. The simulation and experiment results showed that the proposed variable-structure control strategy was in-sensitive to the system disturbance,the dynamic response speed of the system was fast,the current on the line side was sine wave and had nearly the same phase as the voltage,the THD of the current was low and the compensation effect was obviously better than that of the traditional variable-structure control strategy.