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THREE PHASE INVERTER DC-LINK VOLTAGE CONTROL METHOD FOR REACTIVE POWER OVERLOAD TRANSIENT PROCESS
THREE PHASE INVERTER DC-LINK VOLTAGE CONTROL METHOD FOR REACTIVE POWER OVERLOAD TRANSIENT PROCESS
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机译:无功过载暂态过程的三相逆变器直流环节电压控制方法
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摘要
A system and method for controlling a grid-connected reactive power compensation inverter. The system uses a combination of feedforward and feedback controls to compute a reference voltage signal based on sensor-measured voltages and currents, where the reference voltage signal is used to control the inverter switches. The disclosed method modifies a cross-couple feedforward signal used in the reference voltage calculations, where the modified cross-couple signal includes a combination of both reference and actual currents, and the modified control scheme reduces the DC-link voltage overshoot experienced during a capacitive overload event while still providing the required reactive power and maintaining grid system stability.
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