A black start device and a control method of a wind-light power supply microgrid

Abstract

The invention belongs to the technical field of new energy power generation and power supply, in particular to a black start device and a control method of a wind-solar power supply microgrid. As thatphotovoltaic power and the wind power are selected for the black start device and the voltage source energy storage inverter, so that the black start device of the microgrid can operate normally, A DC regulate protection circuit is controlled to gate a black start power supply path by a black start power supply control circuit, the terminal voltage of the battery string is increased by the photovoltaic power and the wind power, and generates a control command according to the electric parameters collected by the electric parameters real-time monitoring circuit, As that voltage source energy storage invert has the starting operate voltage and the corresponding electric power, the natural conditions of solar power generation and wind power can be quickly and conveniently utilized under thecondition that the microgrid does not have the necessary electric power for starting the operation, the black start of the microgrid can be automatically completed, and the technical problem of the black start of the microgrid is effectively and well solved. The voltage source energy storage inverter has the starting operating voltage and the corresponding electric power.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation and power supply, and in particular relates to a black-start device and a control method for a wind-solar power supply microgrid. Background technique [0002] One of the key technologies of the new energy microgrid system dominated by wind and wind power generation is black start, that is, when the wind and new energy cannot generate electricity and supply power due to weather and other reasons, the energy storage system will discharge and supply power, and the long time without power generation will cause the energy storage battery to When the electric energy shines, the micro-grid has no electricity to supply. Even when the wind power or photovoltaic power generation capacity is available, the micro-grid in the state of no power needs a black start if it wants to start operation; The inverter power generation is used as a voltage source to support the voltage and frequency o...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, corresponding photovoltaic or wind power charging equipment has been added. When a black start is required, the DC power line connected to the photovoltaic or wind power inverter is disconnected from the inverter, and connected to the DC input terminal of the photovoltaic or wind power charging equipment. At the same time Disconnect the battery string connected to the energy storage inverter and connect it to the DC output terminal of the photovoltaic or wind power charging equipment, so that the photovoltaic or wind power can charge the corresponding scale battery string that can meet the start-up of the micro-grid and support the power of the micro-grid. Stop charging when the charging reaches the black start power requirement, and reconnect the photovoltaic or wind power DC power line to the photovoltaic or wind power inverter and connect the battery pack to the energy storage inverter in series, and then start the corresponding energy storage inverter The equipment makes the microgrid run; it can be seen that this process is not only cumbersome but also takes more time. For island microgrids in remote areas where no one or few people are on duty, it is more difficult for technicians to be on duty

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