Movable low-voltage ride-through testing device for wind generating set

Abstract

The invention relates to a movable low-voltage ride-through testing device for a wind generating set. The device is connected between a tested wind generating set and an electric network in series, uses an impedance voltage-dividing type and a vehicle container structure, and tests the low-voltage ride-through performance of the wind generating set through analog voltage sag fault; a main connecting wire of the device consists of a serial reactor group, a parallel reactor group and a circuit breaker; the serial reactor group and the parallel reactor group both consist of at least one adjustable reactor; the impedance voltage-dividing ratio can be changed by regulating the impedance value of each adjustable reactor and / or the connecting manner of each adjustable reactor so as to change the voltage sag depth of testing points; and once recovery or a step recovery of the voltage sag can be implemented according to the system requirements. The device can complete the low-voltage ride-through testing experiments for various wind generating sets having a maximum rated capacity of 6 MW, and meet the requirements to the low-voltage ride-through testing experiment in wind electric network integrations in states in Europe and America and Technical Rule for Connecting Wind Farm to Power Networks.

Description

technical field [0001] The invention belongs to the field of new energy grid-connected testing, and in particular relates to a mobile low-voltage ride-through testing device for a wind power generating set. Background technique [0002] The prospect of wind power development in my country is broad: there are at least 253 million kilowatts of wind power resources that can be developed on land. The development reserves are 750 million kilowatts, and the potential for developing offshore wind power is great. In the coastal waters of Shanghai, Jiangsu, Shandong and other provinces and cities, more than 10 offshore wind farms will start construction in 2010-2011. 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 15% of the total installed capacity of the country. [0003] With the increasing proportion of wind power generation in electric energy, the impact of wind p...

AI Technical Summary

Problems solved by technology

However, at present, domestic testing and testing methods are lacking, and it is not yet possible to develop a mobile low-voltage ride-through test device that matches the technical standards. The main testing equipment relies on imports, and it is difficult to provide effective technical support for the grid-connected acceptance test of wind farms. Seriously restricting the development of wind power generation in China

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