Real-time simulation method and device for electromagnetic transient state of wind power plant

Abstract

The invention provides a real-time simulation method and device for an electromagnetic transient state of a wind power plant. An equivalent impedance value of a wind turbine generator system is determined based on an electromagnetic transient characteristic curve of a wind power plant; equivalent construction of a wind power plant equivalent model is carried out on the wind turbine generator system by using the equivalent impedance value; and electromagnetic transient state simulation is carried out on the wind power plant based on the wind power plant equivalent model. The method and device are easy to implement. The simulation precision is improved and the simulation time is shortened; and a problem of alternating-current convergence line coupling during the modeling and simulation process of the wind power plant is solved. The established wind power plant equivalent model enables the wind power plant to be equivalent to a few of limited wind turbine generator systems, so that the actual model of the wind power plant is simplified substantially; the simulation of the super-large-scale wind power plant or the wind power plant collection system is realized; and the real-time simulation capability of the wind power plant is improved substantially.

Description

technical field [0001] The invention relates to the technical field of electromagnetic transient simulation, in particular to a method and device for real-time simulation of electromagnetic transient in a wind farm. Background technique [0002] With the large-scale connection of wind turbines, wind power has become another important power source in the entire power grid besides synchronous machines. Therefore, the research on large-scale wind farms and wind power collection systems is becoming more and more important. However, due to the large scale of wind farms, usually consisting of dozens or even hundreds of wind turbines, detailed modeling of each wind turbine and its control system will greatly increase the complexity of simulation, resulting in too long calculation time , The resource utilization rate is extremely low, so it is necessary to carry out an equivalent modeling of the wind farm. [0003] In the prior art, the electromagnetic transient simulation method o...

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Problems solved by technology

[0004] In order to overcome the shortcomings of low simulation accuracy, difficulty in realization, and long simulation time in the above-mentioned prior art, the present invention provides a method and device for real-time simulation of the electromagnetic transient state of a wind farm, which determines the equivalent value of the wind turbine based on the electromagnetic transient characteristic curve of the wind turbine Impedance; use the equivalent impedance to equivalence the wind turbine to construct an equivalent model of the wind farm; perform electromagnetic transient simulation on the wind farm based on the equivalent model of the wind farm. The technical solution provided by the invention is easy to implement, which not only improves the simulation accuracy, but also reduced simulation time

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