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High-voltage ride-through control method for wind turbine generator

A wind turbine and control method technology, applied in AC network voltage adjustment, reactive power compensation, single-network parallel feeding arrangement, etc. Reasonable effect of the strategy

Active Publication Date: 2020-03-06
HUANENG CLEAN ENERGY RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The publication number is: CN 110138012A, titled "A Wind Turbine High-Voltage Ride-Through Control Method, Device, and Equipment". Research on the proposed control of the high-voltage ride-through core control unit converter

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  • High-voltage ride-through control method for wind turbine generator
  • High-voltage ride-through control method for wind turbine generator
  • High-voltage ride-through control method for wind turbine generator

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, which are explanations of the present invention rather than limitations.

[0032] The difficulty of HVRT unit control lies in the need to simultaneously suppress the overcurrent of the generator rotor and the overvoltage of the DC bus of the converter. The instantaneous value of the open-circuit voltage of the DFIG rotor caused by the sudden change of the grid voltage of the DFIG mainly consists of two parts. The first part is the steady-state component determined by the steady-state value and slip rate after the grid voltage mutation, and the frequency is the slip frequency of the doubly-fed generator; the second part is the transient state component determined by the grid voltage mutation amount and slip rate Attenuation component, the frequency is the rotation frequency of the generator rotor. In the same range of rise or fall, the ...

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Abstract

The invention discloses a high-voltage ride-through control method for a wind turbine generator, and belongs to the technical field of wind power generation. Different control strategies are executedaccording to the power grid voltage state converter, and the voltage borne by the direct current side and the power device of the wind turbine generator converter is less than the power grid voltage by controlling the voltage phasor on the equivalent inductance on the power grid side so that the wind turbine generator is safe, stable and non-off-grid during high-voltage ride-through period, and normal operation and power generation of the wind turbine generator can be guaranteed. The method is high in automation degree without depending on manual operation and is reasonable in strategy and guarantees the stability and the safety of the system and has good economic benefit.

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 control method of a wind turbine. Background technique [0002] With the rapid development of wind power generation in recent years, the grid-connected operation of a high proportion of wind power has brought huge challenges to the safety and stability of the power system. The major wind power developed countries and regions in the world have regulated the grid-connected behavior of wind power through grid-connected guidelines. Especially the fault ride-through capability of wind power, which includes low voltage ride through (LVRT) and high voltage ride through (HVRT). At present, the problem of low voltage ride through has been basically solved, but the problem of high voltage of wind power has not received due attention. [0003] After the low-voltage fault of the power grid recovers, it is often accompanied by a high volt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/16
CPCH02J3/16Y02E40/30
Inventor 焦冲郭辰张立英刘鑫蔡安民
Owner HUANENG CLEAN ENERGY RES INST
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