Parallel active power filter is widely used for harmonic and reactive power compensation in terminal distribution station and terminal load.By analyzing typical harmonic source in the power grid,it is shown that when the DC side of the rectifier is the inductive filter,its characteristic is similar to harmonic current source,while it is the capacitive filter,its characteristic is similar to harmonic voltage source.Based on the analysis of the working principle of parallel active power filter,the compensation characteristics of parallel active power filter for different harmonic sources were studied.The conclusion drawn through research is that parallel active power filter is suitable for compensating nonlinear load of current source type harmonic source,but not suitable for compensating nonlinear load of voltage source type harmonic source,and the latter will produce harmonic current amplification effect.In addition,the measure was provided to suppress the amplification effect of harmonic current.
Active Power FilterHarmonicCompensationCharacteristicResearch
NETL
NSTL
万方数据
