Method for locating forced oscillation disturbance source in doubly-fed wind farm

Abstract

The invention discloses a method for locating a forced oscillation disturbance source in a doubly-fed wind farm. The method constructs an energy function of a doubly-fed wind-driven generator, can determine whether a disturbance source is located on the doubly-fed wind-driven generator, and can further determine the position of the disturbance source inside the generator if so. The method can locate the disturbance source inside the doubly-fed wind-driven generator just by providing the structure and parameter information of an induction generator without the information such as a control modeand the structure of the wind-driven generator, and has a certain universality in a context where various wind-driven generator control modes are provided and a prime mover is complicated in structure. The method can accurately determine the position of the disturbance source inside the wind-driven generator, reflects the situation that each component inside the wind-driven generator participatesin the forced oscillation, and provides convenience for optimizing the structure and control mode of the wind farm.

Description

technical field [0001] The invention relates to the field of power system analysis, in particular to a method for locating a forced oscillation disturbance source in a doubly-fed wind farm. Background technique [0002] At present, there are two main ideas of using the energy function method to locate the source of the forced oscillation disturbance. One is to identify the energy flow direction according to the energy function of the power network. This method does not require specific modeling of the generator structure, but It can only locate a certain branch in the network, and cannot locate the disturbance source to the specific position on the generator; the other considers the energy function inside the generator, and can locate the disturbance source to the internal components of the generator, but in response to Generators with different structures need to be analyzed in combination with the generator model. [0003] The existing methods for constructing the energy ...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two main ideas of using the energy function method to locate the source of the forced oscillation disturbance. One is to identify the energy flow direction according to the energy function of the power network. This method does not require specific modeling of the generator structure, but It can only locate a certain branch in the network, and cannot locate the disturbance source to the specific position on the generator; the other considers the energy function inside the generator, and can locate the disturbance source to the internal components of the generator, but in response to Generators with different structures need to be analyzed in combination with the generator model

[0003] The existing methods for constructing the energy function of synchronous generators are relatively mature, but with the development of new energy, the penetration rate of wind power in the power system is gradually increasing, and the dynamic characteristics of wind turbines are quite different from those of traditional synchronous generators. The inherent characteristics of randomness and volatility and the extensive use of power electronic equipment in wind turbines have introduced a large number of new disturbance sources to the power system, posing threats to the security and stability of the system

However, the existing technology is still unable to accurately locate these disturbance sources

Images