Control method for active power filter based on double-side voltage information
A technology of power filter and control method, applied in active power filter, harmonic reduction device, AC network to reduce harmonic/ripple and other directions, can solve the problems of complex hardware implementation and large amount of calculation, and achieve simplified detection Harmonic process, good dynamic performance, easy-to-achieve effects
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[0017] The present invention will be further described below in conjunction with accompanying drawing.
[0018] see figure 1 , the basic structure of single-phase parallel APF. p in the figure L and q L are the active power and reactive power of the nonlinear load, respectively, p A Active power consumed when working for APF, W S is the energy output by the power supply, W A is the energy output by the APF, W L is the energy consumed by the load, W C is the energy stored in the DC side capacitor C of the APF, L m is the APF output reactor, C m is the APF output high frequency filter capacitor, i C is the APF output current, i L is the load current, A1-A4 constitute the four controllable switches of the converter, and AC represents the power supply.
[0019] In this embodiment, the single-phase parallel APF is taken as an example. When the APF is not used, the nonlinear load makes the system current i S Contains fundamental active current, fundamental reactive curre...
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