Wind turbine generator high voltage ride through test device and method

Abstract

The invention discloses a wind turbine generator high voltage ride through test device and method. The device comprises a circuit breaker, a multi-tap transformer and a controller. The high-voltage ride-through testing device can realize three-phase symmetrical voltage rise, two-phase voltage rise and single-phase voltage rise. The number of the secondary side taps of the transformer is set according to standard requirements, so that the high-voltage ride-through test requirement of the wind turbine generator can be met, and the action time sequence of the circuit breaker can be accurately controlled through a controller. The high-voltage ride-through testing device is small in energy loss, simple in structure and easy to implement, and has high power grid overcurrent tolerance capacity.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a high-voltage ride-through test device and method for wind turbines. Background technique [0002] In recent years, the rapid development of wind power generation, the grid-connected operation of a high proportion of wind power has brought huge challenges to the safety and stability of the power system. At present, the grid-connected characteristics of wind power are regulated through grid-connected guidelines, especially the fault voltage ride-through of wind power ability. [0003] After continuous theoretical research and engineering practice, the understanding and solutions of low voltage ride through of wind power have become increasingly mature, the low voltage ride through capability of wind power has been significantly enhanced, and the problem of low voltage ride through has been basically solved, but the problem of high voltage ride through of...

AI Technical Summary

Problems solved by technology

In 2012, a three-phase short-term short-circuit fault occurred in a power grid in North China. After the wind turbine with low voltage ride-through capability successfully passed through, in the subsequent power grid voltage recovery process, due to the lack of fast automatic switching of the power system and wind farm reactive power compensation device After the power grid fault is removed, the local reactive power surplus of the system is caused, and a short-term high-voltage fault occurs in the power system. A large number of wind turbines that have succeeded in low-voltage ride-through are disconnected from the grid due to the short-term high-voltage fault of the power grid, resulting in further expansion of the system fault. , a serious threat to the safe and stable operation of the power system

The existing resistance-capacitance high-voltage ride-through test device is composed of discrete devices. Different voltage amplitudes need to be matched with different reactance, resistance and capacitance values. The topology is complex, and there is a risk of resonance due to the access of capacitors in the system.

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