Research on the voltage regulation strategy of photovoltaic inverter based on reactive power control
To solve the voltage unbalance problem in the operation of photovoltaic power distribution system,a voltage regulation method of photovoltaic inverter based on reactive power control is proposed.Firstly,by using the photovoltaic inverter to absorb or inject reactive power,the reactive power is used as a function of voltage to control voltage amplitude and voltage imbalance.Secondly,the voltage unbalance is kept below the specified limit to keep the voltage amplitude within the standard range.Finally,the IEEE 37-bus system and real photovoltaic power generation and load demand data are used for simulation tests to verify the actual performance of the proposed method.The experimental results show that the proposed method can effectively control the voltage amplitude at the node within the voltage unbalance threshold,significantly reduce the operating pressure of residential photovoltaic inverters,and promote the distribution system to increase photovoltaic power generation capacity.
photovoltaic systemvoltage regulationvoltage unbalancereactive power controlunbalanced power distribution system
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维普
