Wind power plant virtual synchronous generator control device

Abstract

The invention discloses a wind power plant virtual synchronous generator control device, comprising a field station VSG controller and a single-machine VSG controller, wherein each unit is provided with a single-machine VSG controller, and each single-machine VSG controller is connected to a field station VSG controller. The single-machine VSG controller comprises a frequency measurement unit, a VSG realizing unit, a voltage measurement unit, a voltage closed-loop control unit, a power control unit and a single-machine communication unit. The field station VSG controller comprises a remote management unit, a voltage coordination control unit and a field station communication unit. The remote management unit is used for setting a device, collecting data and operation records of the single-machine VSG controller. The voltage coordination control unit and the wind power plant AVC system jointly adjust and maintain the stability of the voltage of the wind power plant. The field station communication unit is respectively connected to the single-machine VSG controller and the wind power plant AVC system.

Description

technical field [0001] The invention relates to a wind farm virtual synchronous generator control device. Background technique [0002] Variable-speed wind turbines installed in traditional wind farms generally use power electronic converters. While achieving maximum power tracking, there is no coupling relationship between the speed of the wind turbine and the grid frequency, thus hiding the rotational kinetic energy of the wind turbine. There is no response to grid frequency changes. As a large number of wind turbines are connected to the system, the frequency fluctuation caused by the active power disturbance of the power grid is also increasing. However, the AGC system (Automatic Generation Control System) used in traditional wind farms distributes the active power of the entire field according to the dispatching instructions of the power grid. The delay is long, and it cannot respond quickly to active power according to frequency changes during the system transition pr...

AI Technical Summary

Problems solved by technology

On the one hand, due to the constraints of communication time lag and control time constant, the overall response time is hundreds of milliseconds, which limits the rapid response ability of the wind turbine to the system voltage;

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