舰船电力系统单位功率因数谐波电流检测方法的研究

舰船全电力推进技术的不断发展，使舰船上的谐波问题受到更多的关注。提出将基于单位功率因数(UPF)的谐波电流检测方法用于舰船电力系统，并针对舰船电力系统负载变化频繁的特点，采用基于UPF谐波电流检测的并联型有源电力滤波器对其谐波进行抑制。用移动窗积分取代低通滤波器的改进型UPF检测方法，有效解决了低通滤波器的检测延时问题，改善了检测的暂态性能。仿真和实验结果表明，改进型UPF谐波电流检测方法能实时检测谐波电流，在负载变化时能很快的跟踪，特别适合用于舰船电网谐波检测。

Research on Harmonic Current Detection Method Based on Unit Power Factor for Ship Electric Power Systems

With the development of ship electric power propulsion systems, we pay a good deal of at?tention to the harmonic problem of ship electric power systems. Considering the frequent change in the loads of the ship electric power systems, this paper presented to use the shunt active power filter based on unit power factor ( UPF) harmonic current detection method for harmonic suppression ? A detection delay problem exists if a conventional low-pass filter is used to detect harmonic current. The paper pre?sented an improved UPF harmonic current detection method. It used slipped-window integrator in?stead of the low-pass filter to detect harmonic current. MATLAB/SIMULINK results indicate that the modified technique improves the transient performance and has the capability of detecting UPF harmonic current in real time. The proposed technique used for a shunt active power filter experimen?tal prototype based on DSP is developed, the experimental conclusions validate that this modified de-tection method is feasible and effective.