Control device and method for improving stability of photovoltaic virtual synchronous machine system with small-capacity energy storage ratio
A technology of virtual synchronous machine and system stability, applied in the control device for improving the system stability of photovoltaic virtual synchronous machine, the design of photovoltaic virtual synchronous machine, and the detection of photovoltaic dynamic characteristics, which can solve the problem of reducing the maximum output power, inverter collapse, Problems such as unstable working area of photovoltaic power supply
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[0099] The invention provides a control device and method for improving the stability of a photovoltaic virtual synchronous machine system with a small-capacity energy storage ratio. The method obtains active power and reactive power by calculating the sampled output voltage and current, and adds The virtual synchronous machine control strategy of the control, the voltage modulation ratio obtained by the voltage and current control module is sent to the PWM modulator module, and the output pulse drives the IGBT of the three-phase bridge circuit to control the microgrid voltage. The photovoltaic battery energy storage device is connected to the input end of the three-phase bridge circuit. The technical scheme provided by the invention can aim at the complex dynamic characteristics of the photovoltaic power supply, and improve the phenomenon of sudden drop of DC voltage that may be caused by the traditional virtual synchronous motor control strategy.
[0100] The invention inclu...
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