Online test system, device and method of wind power generation equipment

Abstract

The invention relates to an online test system, a device and a method of wind power generation equipment. The online test system comprises a public supply network, wind power generation equipment and an online test device, wherein the online test device comprises a plurality of doubly-fed pulse-width modulation (PWM) converters connected in a parallel mode, one of the plurality of doubly-fed PWM converters is a host device, the others of the plurality of doubly-fed PWM converters are slave devices, the host device regulates output current of each slave device in real time to achieve current-sharing control and controls every slave device within every preset adjustment step length in the process of outputting abnormal work signal to the wind power generation equipment. According to the online test system, the device and the method of the wind power generation equipment, the wind power generation equipment can online test properties of the wind power generation equipment in the process of providing normal power supply to the public supply network. Besides, current output from the wind power generation equipment to the public supply network on the same circuit, inputting of abnormal work signal to the wind power generation equipment and test to the wind power generation equipment can be realized.

Description

technical field [0001] The present invention relates to an online testing system, and more specifically, relates to an online testing system, device and method for wind energy generating equipment. Background technique [0002] During the operation of the power grid, there will be faults such as transient high voltage of the power grid, short circuit of the power grid to ground, and large harmonic content. Due to its own capacity limitation, it is easy to disconnect from the grid and cannot continue to generate electricity. As the capacity of wind power generation equipment increases, this problem becomes more and more obvious. Due to the huge actual capacity of the power grid, it is very difficult for wind power generators to carry out the above-mentioned power grid failure experiment verification on the prototype during the development stage. Many manufacturers adopt the method of on-site trial, but the power grid failure is very random, and the on-site trial often takes ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, the online detection of the wind power generation equipment during the normal power supply process of the wind power generation equipment to the public power grid has not been realized, and the wind power generation equipment has not been realized on the same line to the public grid. Defects in grid output current and detection signal output to wind energy generating equipment, providing an online testing system, device and method for wind energy generating equipment

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