| 摘要: |
| 针对撬棒保护技术存在的双馈风电机组失控问题，提出了转子串电阻和直流侧卸荷电路协调控制的故障穿越方案。该方案不仅能够保证双馈风电机组满足电网规范的穿越要求，同时也抑制了系统机组转速的过快增加，从而有效地改善了机组的转速稳定性和瞬态行为。首先分析了转子串电阻的理论依据，评估了不同限流电阻对机组瞬态特性的影响，选择了合适的电阻值，并分析了所提方案的工作原理。最后基于PSCAD／EMTDC仿真软件对所提方案的有效性进行验证。仿真结果表明，所提方案能保证双馈风电机组成功穿越低压故障，且具有较好的转速稳定性和瞬态特性。 |
| 关键词: 双馈机组 故障穿越 风电 转子串电阻 直流侧卸荷电路 控制 |
| DOI： |
| 分类号: |
| 基金项目:基金项目：国家自然科学基金资助项目（50907040） |
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| Fault ride-through of DFIG wind turbine with rotor series resistor |
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LING Yu1,2, CAI Xu2
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1.Department of Electrical Engineering，Shanxi Datong University，Datong 037003，China;2.WPRC，Shanghai Jiao Tong University，Shanghai 200240，China
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| Abstract: |
| Aiming at the out-of-control problem of the crowbar protection method for DFIG（Doubly-Fed Induction Generator） wind turbines，an FRT（Fault Ride-Through） scheme combining RSDR（Rotor Series Damping Resistor） and DC-side chopper is proposed，which meets the requirements of grid for FRT while suppresses the quick increase of generator speed to improve the speed stability and transient behaviors of unit. The theoretical basis of RSDR is analyzed，the influence of RSDR on system transient performance is discussed，and the optimal resistance is determined. The operating principle of the proposed scheme is analyzed and its effectiveness is verified by PSCAD／EMTDC simulation software. The simulative results show that，the proposed scheme ensures the DFIG wind turbine a successful low-voltage FRT with better speed stability and transient performance. |
| Key words: doubly-fed induction generator fault ride-through wind power rotor series resistor DC-side chopper control |
