A power system power flow calculation method based on the basic model of wind turbines

Abstract

The invention discloses a research method for basic model and flow problems of wind generating sets; detailed analysis and explanation are performed aiming at the structure and the model of a wind driven generator, and the modified equation of a wind speed model is determined based on a four-component model of wind speed. A steady-state flow model for various types of wind driven generators such as the asynchronous wind driven generator and the double-feed wind driven generator is provided based on detailed analysis of output mechanical power of the wind driven generators, on the above basis, a flow computation model for different types of wind driven generators after being grid-connected is determined in combination with existing flow computation, and a simplified processing module and a simplified processing procedure for the asynchronous wind driven generator are provided according to the actual simulation requirement; through researching the flow computation method of the system after the grid connection of wind power, determination of the grid connection scheme of a wind power plant is facilitated, and a foundation is laid for work of further researching stability, reliability and other aspects of the system.

Description

technical field [0001] The invention relates to a research method of a wind generating set, in particular to a power system power flow calculation method based on a basic model of a wind generating set. Background technique [0002] At present, all countries in the world are actively developing renewable energy in order to ensure energy security, realize the diversification of energy sources, and respond to climate change. Wind energy is an inexhaustible clean, non-polluting and renewable energy, so wind power occupies a priority and leading position in the development and utilization of new energy. [0003] The real development of wind power in the world began in the 1970s. Due to the impact of the oil crisis, developed countries such as the United States and Europe invested a lot of money in developing alternative energy sources, and developed modern wind power generators using a variety of advanced technologies. Since the 1990s, the world's wind power has developed rapid...

AI Technical Summary

Problems solved by technology

[0007] (2) Changes in the output of wind turbines (wind turbines) will change the operation mode of conventional units in the grid. Therefore, after the wind farm is connected to the grid, it will have a certain impact on the low-frequency oscillation mode and oscillation characteristics of the grid, and may even cause some Appearance or disappearance of local oscillatory modes

The actual simulation results show that the iterative steps required by the PQ model are small, and the results also meet the requirements, while the RX model requires a large amount of calculation

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