Black-start method for power grid

Abstract

The invention discloses a black-start method for a power grid. The start method comprises the following steps: when an electric power system is powered off due to a fault, judging whether a wind power plant is used as a black-start power supply or not according to the charge state of an energy storage system configured in the wind power plant, if the charge state of the energy storage system is less than 0.2, starting a high-capacity thermal power unit by using the traditional black-start power supply, and externally recovering the power grid step by step. According to the black-start method, wind resources can be adequately utilized and the wind power plant is taken as the black-start power supply for carrying out black-start for the power grid.

Description

technical field [0001] The invention relates to a black start method, in particular to a power grid black start method. 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 in the entire power grid system, and finally realizing the recovery of the entire system . [0003] Generally speaking, the traditional black start power supply includes water turbines and gas turbines with black start capabilities. However, using water turbines to achieve black start, the unit vibrates greatly in the initial stage of black start and under low load conditions; and in dry seasons and areas with scarce water resources, both Satisfying residential and industrial water use while ensuring power supply is very stressful, and it is often impossible to balance the two. Gas turbines also ...

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, the traditional black start power supply includes water turbines and gas turbines with black start capabilities. However, using water turbines to achieve black start, the unit vibrates greatly in the initial stage of black start and under low load conditions; and in dry seasons and areas with scarce water resources, both Satisfying residential and industrial water use while ensuring power supply is very stressful, and often the two cannot be balanced

Gas turbines also have problems such as complex equipment and high maintenance costs

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