Multi-index voltage disturbance generation device and method for wind turbine generator set grid-connected detection

Abstract

The invention discloses a multi-index voltage disturbance generation device and a multi-index voltage disturbance generation method for wind turbine generator set grid-connected detection. The multi-index voltage disturbance generation device comprises a series synchronous compensation unit, a thyristor control impedance voltage division unit, a voltage transformer PT and a control unit, wherein the series synchronous compensation unit and the thyristor control impedance voltage division unit are used for being connected between a tested wind turbine generator set and an on-site boosting box-type transformer; and the series synchronous compensation unit is arranged at the front end of the thyristor control impedance voltage division unit. According to the multi-index voltage disturbance generation device and the multi-index voltage disturbance generation method, different voltage dip curves are generated according to different application occasions, the stepped recovery process of thepower grid voltage is simulated, the automation degree is high, and various disturbance voltage waveform output such as voltage sag (dip), harmonic wave, voltage fluctuation and three-phase imbalancecan be achieved, thereby creating conditions for grid-connected testing of the wind turbine generator set.

Description

technical field [0001] The invention relates to a multi-indicator voltage disturbance generation device and method for grid-connected detection of wind turbines, which can generate voltage sags (drops), swells, voltage deviations, waveform distortions, voltage fluctuations and flashes at the 690V grid-connected point of wind turbines. Various types of voltage quality disturbances, such as voltage change and three-phase voltage unbalance, belong to the field of power management analysis and control. Background technique [0002] my country's wind power development has broad prospects: there are at least 253 million kilowatts of wind power resources that can be developed on land. In the next ten years, multiple 10 million kilowatt-level wind power bases will be built in the northwest, northeast, and Inner Mongolia. According to the plan of the National Energy Administration, it is estimated that by 2020, the total installed capacity of wind power in my country will account for...

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Problems solved by technology

Impedance divider and transformer form can only achieve low voltage disturbance, and the function is relatively single; power electronic transformation form can realize the output of various disturbance voltage waveforms, but the equipment uses a large number of power electronic devices, the equipment is complex, the reliability is low, and the loss is high , occupying a large area, which limits its application

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