基于FSMC的SAPF应用于船舶电网谐波抑制技术的仿真研究

为避免强非线性负载导致的谐波污染对船舶电网可靠运行的危害,提出采用基于模糊滑模控制(FSMC)的并联型有源电力滤波器(SAPF)抑制船舶电网的谐波。在分析船舶电网谐波成分的基础上,采用改进的Ip-Iq法实现谐波电流的实时检测,并针对强非线性负载的瞬变特征,将模糊滑模控制理论引入到SAPF的电流跟踪控制,最终通过向电网注入补偿电流的方式实现对谐波电流的抑制。仿真结果表明,基于FSMC的SAPF技术对船舶电网的谐波抑制效果良好,使电网谐波电流达到相关谐波标准要求。

Simulation Study on Fuzzy Slidng Mode Control-based Shunt Active Power Filters Applied in Harmonic Suppression of Ship Power Grid

To avoid the serious harm of the harmonics produced by the strong nonlinear electronic equipment to the reliable operation of the ship, the fuzzy sliding mode control based shunt active power filters are proposed to suppress the harmonics in the ship power grid. Based on the analysis of harmonic components in the ship power grid, the improved Ip-Iq method based on the instantaneous reactive power theory is used to detect the harmonic in real-time. The fuzzy sliding mode control theory is introduced into the SAPF current tracking control considering the transient characteristics of the strong nonlinear load. The harmonic current is suppressed by injecting compensation current from the SAPF into the grid. The ship harmonic suppression results show that the proposed SAPF technology has better harmonic suppression performance, and the harmonic current satisfies the related harmonic standard requirements.