| 引用本文: | 孙世贤,田 杰.提升直流并网风电故障穿越能力的新方法[J].电力自动化设备,2013,33(8): |
| SUN Shixian,TIAN Jie.Enhancement of fault ride-through capability for grid-connected wind farm[J].Electric Power Automation Equipment,2013,33(8): |
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| 摘要: |
| 提出提升柔性直流并网的风电场系统故障穿越能力的新方法。分析了柔性直流输电的传统电流限幅器的不足，设计了动态改变限值的电流限幅器，该限幅器在电流扰动期间，能限制过电流，并能最大限度地提升输出功率。提出了新的转速储能方法，即利用风电机组自身的转子来实现提速储能，用以短时储存故障期间的过剩能量，以提高并网系统的故障穿越能力。仿真分析验证了所提方法的有效性。 |
| 关键词: 风电场 故障穿越 电流控制 电流限幅 转子储能 柔性直流输电 |
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| Enhancement of fault ride-through capability for grid-connected wind farm |
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SUN Shixian1,2, TIAN Jie2
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1.State Grid Electric Power Research Institute，Nanjing 210003，China;2.NR Electric Co.，Ltd.，Nanjing 211106，China
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| Abstract: |
| A method is proposed to enhance the fault ride-through capability of grid-connected wind farm based on VSC-HVDC. The shortage of traditional current limiter of VSC is analyzed and a current limiter with dynamic limit value is designed，which limits the over-current during current disturbance while raises the output power as big as possible. An energy storage method is proposed，which speeds up the rotor of wind turbine to storage in short time the excessive energy during fault period to improve the ride-through capability of grid-connected system. Simulative analysis verifies its effectiveness. |
| Key words: wind farms fault ride-through electric current control current limit rotor energy storage VSC-HVDC |
