电网电压骤降恢复对双馈风电机组连锁脱网的影响

ZHOU Buxiang

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电网电压骤降恢复对双馈风电机组连锁脱网的影响

更新时间：2025-08-13

- 电网电压骤降恢复对双馈风电机组连锁脱网的影响
- Automation of Electric Power Systems Vol. 42, Issue 17, Pages: 34-41(2018)
- 作者机构：
  
  四川大学电气信息学院,四川省,成都市,610065
- 作者简介：
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- Published：2018
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ZHOU Buxiang. [J]. Automation of electric power systems, 2018, 42(17): 34-41.
DOI：

ZHOU Buxiang. [J]. Automation of electric power systems, 2018, 42(17): 34-41. DOI：

摘要

针对风电低/高电压连锁脱网问题，建立了考虑电网电压骤降恢复阶段的暂态数学模型并对其动态特性进行了分析，详细剖析了该阶段对连锁脱网中高电压穿越过程的影响。电压骤降过程中将会产生定子磁链自由分量，而该分量是考虑电网电压骤降恢复阶段的关键因素。因此，以定子磁链自由分量为切入点，推导出了考虑该阶段的定、转子电流表达式，详细分析并量化了该阶段产生的定子磁链自由分量及不同的故障参数对高电压穿越过程的影响。最后，仿真验证表明了推导的定、转子电流表达式的合理性和暂态模型的正确性。

Abstract

For the low-voltage/high-voltage chain off-grid problems of wind power

this paper develops a transient mathematic model with consideration of recovery stage of grid voltage dip

and analyzes its dynamic characteristics. The effect of the recovery stage on the medium and high voltage ride-through processes in the cascading trip-off fault is analyzed. The free component of the stator flux linkage will be generated during the grid voltage dip

and it is a key factor for the recovery stage of grid voltage dip. Therefore

taking the free component of the stator flux linkage as the entry point

this paper deduces the stator and rotor current expressions with consideration of this stage

and analyzes and quantifies the effect of free components of the stator flux linkage generated and different fault parameters on the high voltage ride-through process. Finally

through simulation and verification

the rationality of the derived stator and rotor current expressions and the correctness of the transient model are verified.

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