Power grid black start-up system and black start-up participation method of photovoltaic power station

Abstract

The invention discloses a power grid black start-up system and a black start-up participation method of a photovoltaic power station, which aims to recover a thermal power plant auxiliary machine system, considers power dynamic balance and a power quality problem in the black start-up process of the photovoltaic power station, adopts photovoltaic power generation equipment, an energy storage device and SVC coordination control, and ensures the feasibility of using the photovoltaic power station as a black start-up power supply through orderly inputting photovoltaic arrays. Compared with a traditional black start-up power supply, the photovoltaic power station has the advantages of short response time, quick power adjustment and economical operation. Therefore, the research on the black start-up participation method of the photovoltaic power station not only is conducive to providing a quick and efficient black start-up scheme for a power grid to deal with emergency accidents, but also is benefit for further exploring an implementation scheme of using a new energy power station as the power grid black start-up power supply.

Description

technical field [0001] The invention relates to the field of power system safety control, in particular to a power grid black start system and a method for a photovoltaic power station to participate in the power grid black start. Background technique [0002] Black start refers to the process of gradually expanding the power supply range of the system through the start-up of units with self-starting capability in the system without relying on the help of other systems after a power outage of the entire system, and finally realizing the recovery of the entire system. [0003] Generally speaking, the first choice of power supply for black start is hydroelectric unit. However, using hydroelectric unit to realize black start has the following problems: the unit vibrates greatly in the initial stage of black start and under low load conditions; Residential and industrial water needs to ensure power supply, and the pressure is very high, and it is often impossible to balance the ...

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Problems solved by technology

[0003] Generally speaking, the first choice of power supply for black start is hydroelectric unit. However, using hydroelectric unit to realize black start has the following problems: the unit vibrates greatly in the initial stage of black start and under low load conditions; Residential and industrial water use, but also to ensure power supply, the pressure is very high, often can not balance the two

[0004] At present, there is a lack of substantive research on the participation of photovoltaic power plants in the black start process at home and abroad, mainly due to the lack of solutions to the intermittent nature of sunlight resources, the ability to control the active and reactive power of photovoltaic power plants, and the power dynamic balance problem during the black start process of photovoltaic power plants. However, the development of photovoltaic power generation technology, the configuration of energy storage devices and dynamic reactive power devices have provided conditions for photovoltaic power plants to be used as black-start power sources for power grids

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