光伏并网系统主动移相式孤岛检测算法的改进

Improvement of Active Phase-shifting Islanding Detection Algorithm in Photovoltaic Grid-Connected Systems

从孤岛检测速度和并网电能质量的角度出发,分析了光伏并网发电系统中常见的主动移相式孤岛检测算法的特点,并针对DSP的应用环境提出了一种改进算法。仿真结果表明,该算法在保持算法的简单和孤岛检测快速的同时,能够降低并网电流和电网电压之间的相位差,相对的提高了并网系统的电能质量,具有实际应用价值。

From the point of detection speed and power quality, common active phase-shifting islanding detection algorithms of grid-connected PV system were analyzed, and an improved algorithm for DSP applications was proposed. Simulation results show that the algorithm is fast due to its simplicity and can reduce phase difference between the output current and the grid voltage so as to improve the power quality. The algorithm has a good application potential in practical grid-connected PV system.