Equivalent simplification method for electric power system with wind power access

Abstract

The invention provides an equivalent simplification method for an electric power system with wind power access. The equivalent simplification method comprises the following steps of establishing an equivalent simplification model of an actual electric power system, wherein the actual electric power system comprises a generator and a load model, a steam turbine and a speed controller model, a water turbine and a speed controller model, and a wind turbine generator model; and the equivalent simplification model of the actual electric power system consists of the equivalent simplification models of the generator and the load model, the steam turbine and the speed controller model, the water turbine and the speed controller model, and the wind turbine generator model; performing parameter polymerization on the equivalent simplification model of the actual electric power system according to a polymerization formula; calculating the frequency regulation capability of the equivalent simplification model of the actual electric power system according to a formula; and calculating steady-state frequency deviation and frequency initial drop rate of the equivalent simplification model of the actual electric power system. The established equivalent simplification model of the actual electric power system can replace the actual electric power system, so that the complex actual electric power system can be simplified, and an effect of researching the complex system through the simple models can be realized.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to an equivalent simplification method for electric power systems connected with wind power. Background technique [0002] In recent years, wind power has become the fastest growing new energy power generation method in the world. The penetration rate of wind power in the power system is gradually increasing. Due to the advantages of low failure rate, high reliability, and convenient power adjustment of double-fed units (type 3) and full rectification wind turbines (type 4), they have gradually become the mainstream models of wind power generation. These two wind turbines are connected to the grid through converters, and the speed and output power of the wind turbines change with the wind speed, decoupling from the grid frequency. However, when the power system suddenly loses the generator set, these two wind turbines cannot rely on the large inertia response capabi...

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Problems solved by technology

However, it does not give the specific equivalent method of the model, and the aggregation method of the parameters of the equivalent simplified model, nor does it give the equivalent accuracy of the equivalent simplified model in different scenarios

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