Method and device for wind turbine generators participating in power grid emergency control

Abstract

The invention discloses a method and device for a wind turbine generators participating in power grid emergency control. The emergency control system comprises a plurality of wind turbine generators and an energy storage system. The emergency control method comprises steps that the control measure quantity of the emergency control system is determined according to the different fault information;the control measure quantity is distributed to each wind turbine generator to obtain the measure quantity corresponding to each wind turbine generator; the adjustment quantity of an energy storage system is determined according to the execution condition of each wind turbine generator on the measure quantity. The device and the method are advantaged in that the active and reactive power rapid adjustable capabilities of a wind turbine generator inverter are utilized, the wind turbine generators are incorporated into the power grid emergency control system, and the power grid emergency control resources can be improved.

Description

technical field [0001] The invention relates to the technical field of electric power system automation control, in particular to a method and device for wind turbines to participate in emergency control of a power grid. Background technique [0002] At present, the transmission and consumption of hydropower, wind power, and photovoltaic power generation have begun to appear. Therefore, it is urgent to establish a long-term mechanism to promote the development and consumption of renewable energy power. [0003] my country's wind power is mainly concentrated in the Northwest, Northeast, and North China regions, and some provinces in the Northwest have more than 50% of their wind power output. Gansu, Xinjiang, and Qinghai have large centralized photovoltaic installed capacity, and Qinghai's photovoltaic / solar thermal installed capacity accounts for 34.7%. In 2018, China's average wind curtailment rate was 7%, a year-on-year decrease of 5 percentage points, and the average sol...

AI Technical Summary

Problems solved by technology

On the one hand, the new energy grid-connected power is coupled with the DC transmission capacity, showing a "seesaw" relationship; on the other hand, the multi-DC transmission power is constrained by the shortage of emergency control resources, and the DC power cannot be further improved

Two factors lead to the limitation of new energy grid-connected power and DC output capacity at the same time, and there is room for further improvement in the consumption of new energy

At the same time, due to the fluctuation and randomness of wind power generation, incorporating wind turbines into the emergency control system may cause the risk of excessive or insufficient control measures, which limits the application of emergency control methods for wind turbines

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