Comparative Analysis of FBD and dq Current Detection Methods

Current detection is the key to improve the power quality by using the active power filter. From two aspects which are algorithm of principle complexity and compensation for current harmonic content, this paper investigates to analyze and compare two novel harmonic current detection methods called FBD method and dq method. The results show that harmonic current can be well compensated by applications of the shunt active power filter with two methods. But FBD method has better prospects of a practical application for simpler algorithm, better real-time, and lower harmonic content after compensation.