基于短路试验的风电场低电压穿越能力验证方法研究

Method Study on Low Voltage Ride Through Capability for Wind Farm Based on Short-circuit Test

随着电网风电装机规模的不断增大,风电场是否具有低电压穿越功能直接影响风电并网安全。目前风电场低电压穿越测试的方法主要以设备测试为主,即对单台风力发电机组进行抽检测试,验证整个风电场具备低电压穿越能力。采用单台测试设备检验风电场低电压穿越能力效率较低,且不能验证整个风电场其他设备的低电压穿越能力。通过短路试验方式来验证风电场低电压穿越能力,并在通辽地区进行现场试验验证。试验结果表明采用短路试验的方法能够更好、更快地开展低电压穿越测试工作,确保大规模风电接入后的电网安全稳定运行。

With the continued large-scale wind power connected to the grid,grid security and stability is one of the elements that can not be ignored,especially if the wind farm has a low voltage ride through（ LVRT） capabilities. Currently wind farm LVRT test methods based mainly on equipment testing,that a single wind turbines for sampling tests to verify the wind farm can be achieved. This method is simple but with limitations. This paper presents a new approach based on the short-circuit tests to verify the wind farm LVRT by the comparison of experiment in Tongliao. The results demonstrate that short-circuit test method can develop LVRT work better and faster,also ensure safe and stable operation of power grid.