Fault traversing performance analog system of double-fed wind driven generator

Abstract

The invention discloses a fault traversing performance analog system of a double-fed wind driven generator, comprising a motor system, an imitator main circuit, a DSP control system and an upper computer monitoring system based on Labview software. The motor system comprises a direct-current motor and a double-fed motor coaxially connected with each other; the imitator main circuit comprises a frequency converter, a direct-current speed regulator, a Crowbar circuit and a voltage spiller module, wherein a voltage spilling generator is connected between the power source and the double-fed motor; the frequency converter is connected between an output end of the voltage spiller and a rotor of the double-fed motor; the direct-current speed regulator is connected between the input end of the voltage spiller and the direct-current motor; and the Crowbar is connected at the rotor side of the double-fed motor. The system has complete analog function of the fan operational characteristic duringa fault of power grid, provides perfect test platform for the research of the double-fed motor and can be used for researching the performances of low-voltage traversing, support to weak grid, and the like.

Description

technical field [0001] The invention relates to a simulation system for researching the performance of a doubly-fed wind power generator, in particular to a simulation system for researching the fault ride-through performance of a doubly-fed wind power generator. Background technique [0002] The field experiment of directly connecting the generator to the wind turbine is not only uneconomical, but also limited by natural conditions. Therefore, many laboratory simulation schemes of wind turbines and generators have been proposed to shorten the research time of wind turbine control performance. The existing doubly-fed wind turbine simulation technology realizes the laboratory simulation of the characteristics of doubly-fed wind turbines without wind field environment, including wind field wind speed simulation, wind turbine characteristics simulation, and doubly-fed generator driven by dual PWM inverters. etc., but they still do not have the function of simulating the dynami...

AI Technical Summary

Problems solved by technology

The existing doubly-fed wind turbine simulation technology realizes the laboratory simulation of the characteristics of doubly-fed wind turbines without wind field environment, including wind field wind speed simulation, wind turbine characteristics simulation, and doubly-fed generator driven by dual PWM inverters. etc., but they do not yet have the function of simulating the dynamic performance of doubly-fed wind turbines in the case of grid faults (voltage dips and imbalances)

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