Method for promoting wind power low voltage consumption

Abstract

The present invention belongs to the electric power technical field and relates to a method for promoting wind power low voltage consumption. The method includes the following steps that: the low voltage consumption function model of a doubly fed wind turbine set is built; simulated analysis is performed on influence on the terminal voltage of the doubly fed wind turbine set caused by a short circuit occurs on the external system of a wind power plant according to the low voltage consumption function model; the low voltage limit value requirement of the low voltage consumption capacity of the doubly fed wind turbine set is determined according to a simulation result; and a series dynamic braking resistor is additionally arranged at the low voltage side of a booting transformer at the wind power plant outlet of the doubly fed wind turbine set, so that simulation can be carried out, and therefore, the terminal voltage of the doubly fed wind turbine set can be improved. With the method adopted, the low voltage consumption capacity of the wind power plant can be improved, certain project investment can be saved, and the price of wind power which is transferred onto a power grid can be decreased to a certain extent, and the development of wind power can be promoted.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for promoting low-voltage accommodation of wind power. Background technique [0002] At present, under the encouragement of my country's emerging industry development policy, wind energy and solar power generation technologies are developing rapidly, especially the proportion of wind power installed capacity in the power system is getting higher and higher, so the operation of wind farms has more and more impact on system stability. People pay more and more attention to it, and put forward specific requirements for wind power grid connection, among which the low voltage consumption capacity of wind turbines is one of them. [0003] Usually, if the power grid fails, the wind turbines will implement passive self-protection and immediately unload, which is acceptable when the grid penetration rate of wind power generation (that is, the proportion of wind power genera...

AI Technical Summary

Problems solved by technology

However, when wind power occupies a large proportion in the power grid, if the wind turbines still adopt passive protective disconnection when the voltage drops, it will increase the difficulty of fault recovery of the entire system, and may even aggravate the fault, eventually leading to the failure of all other units in the system. Therefore, effective consumption control measures must be taken to maintain the stability of the wind farm grid

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