Photovoltaic inverter control method capable of improving power quality of distribution network
A technology of power quality and photovoltaic inverter, applied in photovoltaic power generation, energy storage, AC network load balancing, etc., can solve problems such as cost reduction and insufficient harmonic compensation ability of a single inverter, so as to ensure power quality, Significant social benefits and the effect of ensuring safe use
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[0047] The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings:
[0048] A photovoltaic inverter control method that can improve the power quality of the distribution network, such as figure 1 As shown, including the first control state and the second control state, the specific steps are as follows:
[0049] Step 1. The first control state of independent filter control: when the user side activates the non-linear load, the load side sensor detects the voltage and current, and calculates the THD in real time through the instantaneous reactive power method u And harmonic current, when the load side THD u When higher than the limit and lasting for N power frequency cycles, the sensor sends load-side THD to the inverter u Based on the harmonic current information, the inverter calculates the compensation current according to the remaining capacity, and filters out the harmonics when the inverter is normally connecte...
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