Distributed photovoltaic power generation system control strategy based on virtual synchronous generator

Abstract

The invention proposes a distributed photovoltaic power generation system control strategy based on a virtual synchronous generator, belongs to the technical field of distribution photovoltaic power generation control, and particularly relates to the distributed photovoltaic power generation system control strategy based on the virtual synchronous generator. The invention provides the distributed photovoltaic power generation system control strategy based on the virtual synchronous generator, which can be used for effectively preventing power fluctuation of the system during the dynamic transition process. The distributed photovoltaic power generation system control strategy comprises a photovoltaic array, a power electronic convertor circuit, a power frequency controller, an excitation controller, a virtual synchronous power generator body control link with feed-forward compensation and a sinusoidal pulse width modulation (SPWM) trigger pulse generation device, wherein the structural key lies in that an output end of the photovoltaic array is connected with an input end of the power electronic convertor circuit, and an output end of the power electronic circuit is connected with an AC bus, a signal input end of the power frequency controller, a signal input end of the excitation controller and a signal input end of the virtual synchronous power generator body control link with the feed-forward compensation.

Description

technical field [0001] The invention belongs to the technical field of distributed photovoltaic power generation control, and in particular relates to a control strategy for a distributed photovoltaic power generation system based on a virtual synchronous generator. Background technique [0002] With the development of the economy, people's demand for energy is increasing, and energy and environmental problems are becoming more and more prominent. The large-scale use of traditional fossil energy not only consumes a large amount of resource reserves but also causes serious environmental pollution. The needs of sustainable development of human society. [0003] As a typical renewable energy, solar energy has become an ideal green energy that conforms to the concept of social sustainable development because of its advantages such as wide distribution, no pollution, and flexible use. Distributed photovoltaic power generation is a major means of solar energy development and util...

AI Technical Summary

Problems solved by technology

Although the distributed photovoltaic inverter power supply that introduces the virtual synchronous generator control strategy has the rotor inertia and damping similar to the synchronous generator, which improves the stability of the system to a certain extent, the existing research results are not effective. Overcome the problem of active power and frequency fluctuations in the control process

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