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中文摘要：
随着风电在电网的比例增大，在电网故障时，风机应具备一定的故障穿越能力，也就是风机的低电压穿越（ LVRT）能力。含LVRT能力的风机的风电场在并入电网后，首先是改变了系统的结构，另外，系统故障时，风力发电机也表现了其特有的故障特性，因此，使系统原有保护不可靠动作。主要讨论了风电场并网后对重合闸前加速、后加速分别造成的影响，并根据不同的影响给出了相应的改进措施，并由此得出在不同的故障位置下，风电场并不能全部进行低电压穿越运行的结论。
英文摘要：
As the proportion of wind power increases in power grid , the fan should have the fault ride -through capability when the grid fails, that is, the low voltage ride-through （LVRT） capability of fan.After the wind farms including wind turbines with LVRT capability connect to the grid , the structure of the system is changed firstly .In addition , when the system has fail-ures, the wind turbines also show its unique fault characteristics .So the existing protection of the system cannot act reliably . The respective influences of wind farm after its connection to the grid on the former and the back acceleration reclosure brakes are mainly discussed , and the corresponding improvement measures are given according to the different influences .And thus the conclusions are obtained that not all of wind farm will be able to run across a fault in different fault locations .
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