| 引用本文: | 曹娜,黄坤,于群,等.基于动态励磁电流的双馈风机组控制策略[J].电力系统保护与控制,2016,44(6):29-34. |
| CAO Na,HUANG Kun,YU Qun,et al.A control strategy of doubly-fed induction generator based on dynamic process of excitation current[J].Power System Protection and Control,2016,44(6):29-34 |
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| 摘要: |
| 针对定子励磁电流动态过程对双馈变速风电机组(DFIG)暂态特性的影响，在传统控制策略基础上，分析了故障时定子励磁电流的变化过程及其对双馈风电机组暂态特性的影响，建立了计及定子励磁电流动态过程的DFIG控制模型。在PSCAD/EMTDC仿真平台上，对传统控制策略和改进后的控制策略进行了仿真比较。结果表明，在电网故障下，改进后的控制策略比传统控制策略能更有效地抑制转子侧输出电流的波动，提高了机组的暂态稳定性和不间断运行能力，验证了其正确性和有效性。 |
| 关键词: 双馈变速风电机组 定子励磁电流 PSCAD 控制策略 电网故障 |
| DOI：10.7667/PSPC150894 |
| 分类号: |
| 基金项目: |
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| A control strategy of doubly-fed induction generator based on dynamic process of excitation current |
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CAO Na1, HUANG Kun1, YU Qun1, LI Yan2, WANG Zhen2
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1.College of Electrical Engineering and Automation, Shandong University of Science and Technology,Qingdao 266590, China;2.China Electric Power Research Institute, Beijing 100192, China
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| Abstract: |
| According to the influence of the dynamic process of stator excitation current on the transient characteristics of doubly-fed induction generator (DIFG), this paper, on the basis of traditional control strategy, analyzes the change process of fault stator excitation current and its effect on DIFG’s transient characteristics, establishes the DIFG control model including the dynamic process of stator excitation current. This paper compares the traditional control strategy with improved control strategy on the simulation platform of PSCAD/EMTDC. The results show that the improved control strategy can suppress the fluctuation of rotor-side current more effectively under grid voltage fault, and enhance uninterrupted operation capacity and transient stability. By simulation, the correctness and validity of the control strategy are proved. |
| Key words: doubly-fed induction generator stator excitation current PSCAD control strategy grid fault |
