电网电压对称骤升时DFIG暂态电流分析及限流电阻阻值优化

SUN Liling

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电网电压对称骤升时DFIG暂态电流分析及限流电阻阻值优化

更新时间：2025-08-13

- 电网电压对称骤升时DFIG暂态电流分析及限流电阻阻值优化
- Automation of Electric Power Systems Vol. 42, Issue 7, Pages: 123-129(2018)
- 作者机构：
  
  华北电力大学电气与电子工程学院,河北省,保定市,071003
- 作者简介：
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- Published：2018
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SUN Liling. [J]. Automation of electric power systems, 2018, 42(7): 123-129.
DOI：

SUN Liling. [J]. Automation of electric power systems, 2018, 42(7): 123-129. DOI：

摘要

双馈感应风力发电机(DFIG)高电压穿越(HVRT)问题中，常规研究对电磁暂态特性的分析往往忽略掉故障切除这一特殊时刻，使得HVRT期间转子电流的最大值计算不准确，造成限流电阻整定偏小，无法完成电压恢复后的HVRT。在对DFIG电磁暂态全过程分析的基础上，根据叠加原理推导出电压对称骤升故障发生到切除及其后的转子电流表达式，同时考虑了换流器输出和机端电压不同骤升程度对转子电流的影响，所得结果更具一般性。此外，综合考虑故障发生和切除时刻转子电流的最大值，对限流电阻阻值进行优化。仿真结果验证了理论分析的正确性。

Abstract

In the doubly-fed induction generator(DFIG)high voltage ride-through(HVRT)problem

the conventional research on the analysis of electromagnetic transient characteristics often ignores the special time of fault removal

which makes the calculation of rotor current maximum value inaccurate during high voltage ride-through. As a result

the resistance of current limiting resistor is too small to complete the high voltage ride-through after fault removal. Based on the analysis of the whole process of DFIG electromagnetic transient

the rotor current expression from fault occurrence to removal is deduced according to the superposition principle

and the influence of the converter output and the stator-side voltage on the rotor current is considered to get more general results. In addition

considering the maximum value of the rotor current at the time of fault occurrence and removal

the current limiting resistance is optimized. Simulation results verify the correctness of the theoretical analysis.

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