Doubly-fed wind-power virtual synchronous generator performance testing method and system based on RT-Lab

Abstract

The invention provides a doubly-fed wind-power virtual synchronous generator performance testing method and system based on an RT-Lab. The system comprises a digital model, a doubly-fed fan main controller, a current transformer controller and an observing device which are set up in an RT-Lab simulation machine, wherein the digital model comprises an asynchronous motor, a transformer, a current transformer and a power grid. The transformer is arranged between an asynchronous motor stator and the power grid. The current transformer is arranged between an asynchronous motor rotor and the asynchronous motor stator. The doubly-fed fan main controller is provided with a fan body and a simulation program of a transmission shaft system and is connected with the current transformer controller andthe RT-Lab simulation machine. The current transformer is connected with the RT-Lab simulation machine. The observing device is connected with the doubly-fed fan main controller and the current transformer controller. The doubly-fed wind-power virtual synchronous generator performance testing system can avoid limitation of site testing and makes testing results closer to practical engineering. Inaddition, control strategies of doubly-fed wind-power virtual synchronous generators from different manufacturers can be comprehensively accessed, and guidance is provided for engineering application.

Description

technical field [0001] The invention belongs to the field of wind power, and in particular relates to a performance testing method and system of a virtual synchronous generator based on RT-Lab double-fed wind power. Background technique [0002] With the depletion of traditional energy and the aggravation of environmental problems, new energy power generation technologies represented by photovoltaics and wind power are developing rapidly, and double-fed wind turbines account for a considerable proportion of them. Since the doubly-fed wind turbine uses an asynchronous generator, its output power has almost no coupling with the frequency and voltage of the grid, so it is difficult to provide the necessary frequency and voltage support for the grid. As the penetration rate of double-fed wind turbines in the power grid continues to increase, it is urgently required that double-fed wind turbines have the same frequency and voltage regulation capabilities as traditional synchronou...

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Problems solved by technology

[0005] The present invention is used to solve the problem of verifying the performance of the doubly-fed wind power virtual synchronous generator in the prior art by means of digital simulation. On the one hand, there is a large discrepancy with the actual engineering consistency; to consider

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