| 引用本文: | 李生民,贾铎,肖亚敏.采用新型动态撬棒的DFIG低高电压连锁故障穿越技术研究[J].电力系统保护与控制,2018,46(14):79-86.[点击复制] |
| LI Shengmin,JIA Duo,XIAO Yamin.Low-high voltage chain fault ride-through technology of DFIG with active crowbar[J].Power System Protection and Control,2018,46(14):79-86[点击复制] |
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| 摘要: |
| 针对传统撬棒电路(采用固定电阻)在解决双馈风力发电机(DFIG)低高电压连锁故障穿越时，难以兼顾发电机转子侧电流和直流母线电压的抑制问题，采用电机电磁暂态分析的方法，找出了双馈风力发电机转子电流、电压与撬棒电阻的关系，提出一种撬棒电阻动态自适应的控制方法。该方法适用于低电压、高电压及低高电压连锁故障，解决了电网故障穿越时无法同时抑制转子电流和母线电压的波动问题。采用理论分析和仿真实验，证明该方法在电压跌落故障、电压骤升故障以及低高压连锁故障下能够有效地抑制转子电流和直流母线电压的波动，提高了系统的故障穿越能力。 |
| 关键词: 双馈风力发电 低电压穿越 高电压穿越 低高电压连锁故障穿越 新型动态撬棒 |
| DOI：10.7667/PSPC170998 |
| 投稿时间：2017-07-05修订日期：2017-12-01 |
| 基金项目:国家自然科学基金项目资助(51607142);陕西省重点产业创新链-工业领域项目资助(2017ZDCXL-GY-01-01) |
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| Low-high voltage chain fault ride-through technology of DFIG with active crowbar |
| LI Shengmin,JIA Duo,XIAO Yamin |
| (Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing, Xi’an 710048, China;Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi’an 710048, China) |
| Abstract: |
| Aiming at the problem that it is difficult for traditional crowbar circuit (fixed-value resistance) to balance the generator rotor side current and DC bus voltage while solving link fault ride-through of Double Fed Induction Generator (DFIG), the method of generator electromagnetic transient analysis is adopted to find out the relationship between rotor current, voltage and crowbar resistance of the DFIG, and the control method is suitable for low voltage, high voltage and low-high voltage chain fault, solving the problem that it’s difficult to suppress the fluctuation between the rotor current and the bus voltage simultaneously during the gird fault ride-through. The theoretical analysis and simulation results validate that the method can effectively suppress the fluctuation of rotor current and DC bus voltage chain fault, and improve the system's fault ride-through capability. This work is supported by National Natural Science Foundation of China (No. 51607142). |
| Key words: doubly-fed induction generator low voltage ride through high voltage ride through low-high voltage chain fault ride through novel active crowbar circuit |
