Analysis method for analyzing dynamic and reactive power control interactive impact in wind power convergence region

Abstract

The invention provides an analysis method for analyzing the dynamic and reactive power control interactive impact in a wind power convergence region. The analysis method comprises the steps of forming a node admittance matrix and a network equation according to a spatial grid structure in a to-be-analyzed wind power convergence region; establishing a dynamic equation and an output equation of a dynamic reactive power compensation device according to the control mode of the dynamic reactive power compensation device in the to-be-analyzed wind power convergence region; according to the network equation, the dynamic equation and the output equation, forming a linear differential equation and a linear state matrix of the to-be-analyzed wind power convergence region; according to the linear state matrix, acquiring the characteristic roots of the dynamic reactive power compensation device in different control modes; and based on the participation vector analysis of the characteristic roots, generating an analysis result for analyzing the dynamic and reactive power control interactive impact in the to-be-analyzed wind power convergence region.

Description

technical field [0001] The invention relates to the reactive power and voltage control technology of wind farms, in particular to a method for analyzing the interactive influence of dynamic reactive power control in wind power collection areas. Background technique [0002] Due to its renewable, wide distribution, and non-polluting characteristics, wind energy has become an important direction for the development of renewable energy in the world. Since my country's wind energy resources are mainly concentrated in the "three north" regions, and the load centers are mostly distributed in the eastern region, it is determined that my country's current large-scale centralized access to wind power and long-distance transmission of supply loads, and this method provides electricity The system brings many challenges, among which, the reactive power and voltage problem of the wind farm access system is a more prominent one. To deal with this problem, the "Technical Regulations for Wi...

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Problems solved by technology

[0004] In order to avoid the occurrence of the above-mentioned accidents, it is necessary to evaluate the voltage stability of the wind power collection area controlled by the static var compensator (SVC). The constant reactive power control method of the inductive branch of the device can stabilize the voltage stability of the collection area when the system has capacitive disturbances, and it is impossible to evaluate the voltage stability of the SVC when the constant voltage control is used. Control methods, as well as high-voltage side constant voltage control, low-voltage side constant voltage control, etc.

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