Variable power point tracking control method of two-stage type no-energy-storage photovoltaic virtual synchronization machine
A virtual synchronous machine and variable power point technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve practical application difficulties, cannot apply two-stage photovoltaic system, increase the cost and maintenance workload of photovoltaic power generation system, etc. problem, to achieve the effect of improving the system voltage and frequency stability
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[0028] The present invention provides a two-stage non-energy storage photovoltaic virtual synchronous machine control method for variable power point tracking. The present invention will be further described below in conjunction with the accompanying drawings.
[0029] figure 1 Shown is the topology of a two-stage three-phase photovoltaic virtual synchronous machine. The photovoltaic battery PV is connected to the local load or the grid through the Boost circuit, inverter and LC filter, and the three-phase equivalent load is used to replace the local load and the load required by the grid. Sum. Photovoltaic cells PV and Boost circuits are modeled as prime movers that provide energy consistent with load variations, and inverter and LC circuits can model the rest of the synchronous generator. How the Boost circuit adjusts the output power of the photovoltaic cell to provide the same energy as the load demand, and how the inverter simulates the inertia and damping of the synchro...
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