Wind power station equivalent modeling method of large-scale wind power concentration access power grid

Abstract

The invention discloses a wind power station equivalent modeling method of a large-scale wind power concentration access power grid. The method comprises the following steps: based on the electrical distance between all wind power station entry points of access power grid, topology distribution, model and control mode of a wind generator in the field, adopting a coherent generator groups identification method to determine the coherent wind generator group; enabling the same coherent generator group to be equivalent as a wind generator group; adopting a weighing equivalent parameter polymerizing method to resolve all the dynamic electric parameters of the equivalent wind generator group, wherein the parameters are equivalent as a form of equivalent impedance connected the equivalent machine in series according to the static equivalence theory; resolving the relative static parameters; and based on the obtained wind power station equivalent form to develop and realize wind power stationmodeling in a PSD-BPA simulation platform. The method solves the problem of the wind power station equivalent modeling in the prior art, and provides the simulation tool for operation mode analysis and scheduling control of the power grid.

Description

technical field [0001] The invention belongs to the field of power system simulation modeling, and in particular relates to a wind farm equivalent modeling method for large-scale wind power centralized access to a power grid. Background technique [0002] In order to achieve the grand energy strategy of low-carbon, environmental protection, green and sustainable development, my country has vigorously developed renewable energy in recent years, and has issued a series of standards and policies for renewable energy, giving strong support at the national level. Renewable energy has been developed by leaps and bounds. Especially for wind power, a series of projects such as wind farm planning, construction, and grid-connected operation in the Three Norths of my country are underway. my country's wind power presents the characteristics of "large-scale centralized access, long-distance transmission, and large-scale consumption", supplemented by "large-scale decentralized access, lo...

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Problems solved by technology

[0004] Aiming at the problems in the prior art that large-scale wind power grid-connected analysis requires wind farm equivalent methods and their rationality needs to be tested, or the implementation is inconvenient, the present invention provides a practical equivalent method, which gathers and combines several wind turbines The field model with detailed wiring forms is equivalent to the wind farm equivalent model. This scheme makes the impact of the wind farm on the power grid before and after the equivalence tend to be consistent, and the program implementation and maintenance are convenient. The specific scheme is as follows: A large-scale wind power centralized connection The equivalent modeling method of wind farms connected to the grid is characterized in that based on the electrical distance between the grid-connected points of each wind farm connected to the grid, the topological distribution of each wind turbine in the wind farm, the type of wind turbine and the control of the wind turbine mode, perform the following steps:

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