计及多级撬棒投切和无功补偿策略的双馈风力发电机故障特性分析

张丕豪; 束洪春; 孙士云; 蒋朝顺; 李博宇; 岩比

doi:10.19912/j.0254-0096.tynxb.2025-0015

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (6) : 239-251. DOI: 10.19912/j.0254-0096.tynxb.2025-0015

计及多级撬棒投切和无功补偿策略的双馈风力发电机故障特性分析

张丕豪, 束洪春, 孙士云, 蒋朝顺, 李博宇, 岩比

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ANALYSIS OF FAULT CHARACTERISTICS OF DOUBLE FED INDUCTION GENERATOR CONSIDERING MULTI-STAGE CROWBAR SWITCHING AND REACTIVE POWER COMPENSATION STRATEGY

Zhang Pihao, Shu Hongchun, Sun Shiyun, Jiang Chaoshun, Li Boyu, Ai Bi

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文章历史 +

摘要

针对传统撬棒保护在低电压穿越时,难以兼顾对转子电流和直流母线电压的抑制以及吸收无功等问题,提出多级撬棒投切和无功补偿的控制策略,在故障期间通过分级投切撬棒,实时调整撬棒阻值从而达到抑制转子过电流和直流母线过电压的目的,在多级撬棒投入的同时网侧变流器（GSC）采用无功补偿策略,使得风力机可向电网提供一定的无功支撑。在此基础上,分析各级撬棒投入后转子磁链的变化,推导出每级撬棒投入后的定、转子短路电流解析式并整定各级撬棒阻值,然后根据无功补偿策略分析GSC的短路电流,随后进一步分析多级撬棒保护接入和GSC附加无功补偿策略对双馈风力发电机无功特性的影响。最后对所提出控制策略的有效性及理论分析的正确性进行仿真验证。

Abstract

In view of the problems that traditional crowbar protection is difficult to simultaneously suppress rotor current and DC bus voltage as well as absorb reactive power during low-voltage ride-through. This paper proposes a control strategy of multi-stage crowbar switching and reactive power compensation. During the fault period, the crowbar resistance is adjusted in real time by grading the crowbar, so as to achieve the purpose of suppressing the rotor overcurrent and DC bus overvoltage. At the same time as the multi-stage crowbar is put into operation, the GSC adopts the reactive power compensation strategy, so that the fan can provide certain reactive power support to the power grid. On this basis, the change of rotor flux linkage after the crowbars at all levels are put into operation is analyzed, analytical expressions for the stator and rotor short-circuit currents upon the activation of each crowbar stage are derived, and the resistance value for each stage is subsequently set. Then, the short-circuit current of GSC is analyzed according to the reactive power compensation strategy, and then the influence of multi-stage crowbar protection access and GSC additional reactive power compensation strategy on DFIG reactive power characteristics is further analyzed. Finally, the effectiveness of the proposed control strategy and the correctness of the short-circuit current expression are verified by simulation.

导出引用

张丕豪, 束洪春, 孙士云, 蒋朝顺, 李博宇, 岩比. 计及多级撬棒投切和无功补偿策略的双馈风力发电机故障特性分析[J]. 太阳能学报. 2026, 47(6): 239-251 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0015

Zhang Pihao, Shu Hongchun, Sun Shiyun, Jiang Chaoshun, Li Boyu, Ai Bi. ANALYSIS OF FAULT CHARACTERISTICS OF DOUBLE FED INDUCTION GENERATOR CONSIDERING MULTI-STAGE CROWBAR SWITCHING AND REACTIVE POWER COMPENSATION STRATEGY[J]. Acta Energiae Solaris Sinica. 2026, 47(6): 239-251 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0015

中图分类号： TM315

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