A distributed microgrid black start control system and method based on photovoltaic and energy storage

Abstract

The invention relates to a distributed micro-grid black-start control system and method based on photovoltaic and energy storage. At present, a distributed micro-grid black-start control system and method based on photovoltaic and energy storage, which are reasonable in structural design, do not exist. The black-start control system is characterized in that a photovoltaic array interface, a photovoltaic DC converter, a photovoltaic grid connected controller and an AC bus are connected in sequence through a cable, the photovoltaic DC converter, an energy storage charging controller and a storage battery are connected in sequence through a cable, and an energy storage current transformer controller and a storage battery DC controller are connected through a communication cable. The black-start control method is characterized in that A, an AC bus system provides power; B, a DC bus system provides power; and C, black-start of a distributed power supply is performed. The control system is reasonable in structural design, black-start of a distributed power supply can be achieved, the power failure area, the power failure time and the recovery time once a power grid breaks down can be reduced, and the safety stability of regional power grids and a large power grid can be improved.

Description

Technical field [0001] The invention relates to a distributed micro-grid black start control system and method based on photovoltaics and energy storage, in particular to an application and distributed micro-grid system and a distributed energy station system. Background technique [0002] Distributed microgrid is based on distributed power generation technology, organizes distributed power sources (DR) in a certain area, combines end-user power quality management and energy cascade utilization technology to form a small, modular, decentralized energy supply network. The microgrid is an important part of the power grid. It can realize the joint operation of internal power supply and electric load, and realize the connection of the microgrid and the main grid through the microgrid grid-connecting switch, realize the coordinated control between the microgrid and the main grid, and can connect smoothly. Access to the main grid and independent operation, fully meet the user's require...

AI Technical Summary

Problems solved by technology

[0005] To sum up, at present there is no reasonable structural design, black start of distributed power generation, reduction of power outage area, power outage time and recovery time in case of power grid failure, and improvement of the safety and stability of regional power grids and large power grids based on photovoltaic and Distributed microgrid black start control system and method for energy storage

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