Electromagnetic transient state simulating method of double-fed wind power generation set system with variable speed and constant frequency

Abstract

The invention provides an electromagnetic transient state simulating method of a double-fed wind power generation set system with a variable speed and a constant frequency, relates to a wind power generation system, and in particular relates to a method for the modeling analysis of a double-fed wind power generation set system by using computer programs. The method comprises the following steps: establishing a wind power model to simulate the wind power absorbed by a wind turbine; establishing a wind turbine shafting model; establishing a propeller pitch control system model; establishing an electrical simulation model of a double-fed asynchronous induction motor; establishing a controller model of a frequency converter on the side of a power grid and the frequency converter on the side of a rotor; establishing a double-fed wind turbine stand-alone infinity system model by using a wind power generation set simulation module; setting a simulated operation condition and a failure state of the power generation set system; and carrying out an electromagnetic transient simulation, thereby verifying the setting value and the rationality of the protective system. According to the invention, the detailed models conforming to the physical properties of the double-fed wind power generation set system with the variable speed and the constant frequency are established to carry out simulations on the electromagnetic transient state and the electromechanical transient state, so that the dynamic properties of a wind turbine under various failure and working conditions are investigated. Therefore, the simulations of the wind turbine in large-scale power grids are realized possibly.

Description

technical field [0001] The invention relates to a wind power generation system, in particular to a method for modeling and analyzing a doubly-fed wind power generating set system by using a computer program. Background technique [0002] Since the 1980s, the application of wind power generation has attracted more and more attention from all over the world. With the rapid development of science and technology, especially the application of aerodynamics, cutting-edge aerospace technology and high-power power electronics technology to the development and development of new wind turbines, wind power has made great progress in the past two decades. Today's wind power generation is gradually moving toward scale and industrialization, and the proportion of wind power generation in the power grid is increasing, becoming the most mature and realistic clean energy power generation method besides hydropower generation. Vigorously developing wind power generation is of great significan...

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Problems solved by technology

In addition, PSCAD / EMTDC can also establish the electromagnetic transient model of the fan, and the modeling accuracy can reach the device level, so it is an ideal tool for investigating the dynamic characteristics of the fan stand-alone system under various working conditions and faults, but it is not suitable for the connection of the fan Simulation after the big net

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