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非线性负载的广泛应用,导致独立电源系统中含有大量的谐波电流和无功电流,严重影响电源的供电质量,有源滤波器通常被用来滤除电网中的谐波电流和无功电流。首先,定性分析引起有源滤波器输出电流相位滞后的原因,并利用Matlab建立系统的数学模型,通过仿真定量分析相位滞后对有源滤波器补偿性能的影响;然后,提出有源滤波器输出电流相位滞后补偿的方法。仿真和实际工程的应用,证明所提方法是有效和可行的。
The widespread use of nonlinear loads leads to a large amount of harmonic current and reactive current in the independent power system, seriously affecting the power quality of the power supply. Active filters are often used to filter out the harmonics and reactive currents . First of all, the reason of the phase lag of the output current of the active filter is qualitatively analyzed. The mathematical model of the system is established by Matlab, and the influence of the phase lag on the compensation performance of the active filter is quantitatively analyzed by simulation. Then, the output current of the active filter Phase lag compensation method. Simulation and practical engineering applications prove that the proposed method is effective and feasible.