An analysis method of countermeasures for the impact of wind farm access on local power grids

Abstract

The invention provides a method for analyzing counter measures on influences of connection of a wind power plant on a partial electric network. The method comprise the following steps of analyzing the output characteristics and the load correlation of the wind power plant, and assessing the influences of the wind power plant on the partial electric network; analyzing influences on the reactive power and the load flow of the partial electric network after the wind power plant is connected, determining a reactive compensation strategy and a control strategy of the wind power plant; calculating a short-circuit current provided by the wind power plant, and calibrating related bus capacity and the interrupting capacity of a switchgear; assessing the transient stability of the partial electric network after the wind power plant is connected, and providing a transient stability control strategy of the partial electric network; analyzing whether all power quality indexes meet standard requirements or not after the wind power plant is connected, and determining feasible management strategies when the power quality indexes exceed the standard requirements. The method for analyzing the counter measures on the influences of the connection of the wind power plant on the partial electric network is comprehensive in analysis and high in practicability, lays a scientific base on effective assessment of grid connection influences of the wind power plant, and safe and stable operation of the electric network after the wind power plant is connected can be guaranteed.

Description

technical field [0001] The invention relates to an analysis method, in particular to an analysis method for countermeasures for the impact of wind farm access on local power grids. Background technique [0002] The characteristics of wind power generation are significantly different from thermal power generation, hydropower generation and other power generation methods with stable output: (1) The fluctuation of power generation output. Due to the inherent limitation of resources, its output power is directly affected by the change of wind speed and has very obvious fluctuation characteristics, and its output fluctuation will have a great impact on the power balance and peak regulation of the system. (2) Weak support of power generation technology. Asynchronous generators and power electronic converters are widely used in wind power generation. This power generation technology is quite different from the synchronous generator technology used in traditional thermal and hydrop...

AI Technical Summary

Problems solved by technology

Due to the inherent limitation of resources, its output power is directly affected by the change of wind speed and has very obvious fluctuation characteristics, and its output fluctuation will have a great impact on the power balance and peak regulation of the system

(2) Weak support of power generation technology

Most of the early methods for analyzing the impact of wind farms connected to the power grid used conventional unit capacity instead or treated wind power simply as a pure load, which could not fully reflect the inherent characteristics of wind power, and the analysis was mainly focused on one aspect, so it was not possible to comprehensively evaluate wind power. The impact of field access to the grid on the system

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