Method for uniformly controlling distribution type grid-connected power generation and active power filter
A power filter and distributed power supply technology, applied in active power filtering, AC network to reduce harmonics/ripples, harmonic reduction devices, etc., can solve low equipment utilization, power grid stability, high APF cost, Expansion is difficult and other problems, so as to avoid low utilization rate of equipment, improve power quality, and overcome high cost
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[0024] exist figure 1 When terminal 1 of K is closed, the inverter is in active filtering mode, and the DC side voltage is stabilized by the PI controller. If the DC side voltage is lower than the reference voltage, the inverter increases the DC voltage by absorbing active energy from the grid; otherwise, it injects active energy into the grid to reduce the DC voltage. Then the command current is compared with the actual compensation current, and then an adaptive hysteresis comparison controller is used to generate a PWM signal to drive the inverter to realize the compensation of reactive power and harmonics of the grid. When the 2 terminals of K are closed, the inverter is in the unified control mode of grid connection and active filter. According to the command current synthesized by active power command current, reactive current and harmonic current of distributed grid-connected power generation, grid-connected power generation and reactive power and harmonic current compe...
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