Parallel Active Power Filter
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The article mentions that the parallel active power filter employs a very simple structure without complex control requirements. However, to further improve system performance, techniques such as PI control and reactive power compensation can be implemented. In code implementation, the PI controller would typically involve error calculation between reference and measured values, with proportional and integral gains adjusted through systematic tuning methods. Reactive compensation algorithms would require harmonic detection and current reference generation using techniques like instantaneous power theory (p-q theory) or synchronous reference frame (d-q theory). These measures would significantly enhance system stability and power efficiency by maintaining DC-link voltage stability and providing accurate harmonic current injection.
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