Automatic unit start-stop control method based on theoretical power of wind power plant

Abstract

The invention belongs to the technical field of wind power generation, and particularly discloses an automatic unit start-stop control method based on theoretical power of a wind power plant. On the premise of meeting the requirement of dispatching for the output of the wind power plant, internal start / stop rotation of a wind turbine group is achieved, a target value can be ensured to be rapidly tracked by adjusting the active power of a grid-connected wind turbine generator when the dispatching target value of the power grid is increased, and power generation loss caused by start time consumption is avoided. Meanwhile, redundant start and stop actions of the unit caused by rapid change of a power grid dispatching instruction and wind speed are avoided, and healthy and stable operation ofthe unit is guaranteed. The method can be combined with an active power control distribution strategy of the wind power plant to better realize active dispatching in the wind power plant, reduce unnecessary unit wear, grease consumption and the like, prolong the service life of the wind turbine generator, improve the economic benefit of the wind power plant and effectively ensure the stability ofa power system.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a control method for automatically starting and stopping a unit based on the theoretical power of a wind farm. Background technique [0002] As one of the main forms of clean energy utilization, wind power has developed rapidly in recent years. As the proportion of wind power in grid power generation gradually increases, the randomness and fluctuation of active power of wind farms have brought great harm to the safe operation of the grid. The great challenges cannot be ignored. Therefore, realizing the adjustable active power of wind farms is an inevitable requirement for safe grid-connected operation of large wind farms. [0003] At present, in the active power dispatching of wind farms, the automatic active power control system is mainly realized by adjusting the active power of the grid-connected wind turbines, and the start / stop of the units is mostly completed...

AI Technical Summary

Problems solved by technology

Artificial starting / stopping of wind turbines is uncertain, and it is difficult to guarantee fairness. It may cause some units to run for a long time, resulting in an increase in the failure rate of the unit, while some units cannot be started due to too long downtime, and wind turbines are frequently started / stopped itself will affect its stability and service life

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