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介绍了琅琊山抽水蓄能电站的变频起动装置(SFC)产生的谐波的计算方法,并且指出,国家标准《电能质量公用电网谐波》是针对公用电网的连续谐波制定的,由于抽水蓄能电站 SFC 短时工作的特点以及 SFC 连接处不是公用电网,没有必要按国标来苛求抽水蓄能电站的谐波水平。对于国标中所列的谐波电流限值,应当根据实际短路容量进行换算,这样一来,即使按国标从严要求,12脉动的 SFC 方案在谐波指标上也完全过关,不必要装设滤波器。
The calculation method of harmonics generated by variable frequency starting device (SFC) of Langyashan Pumped Storage Power Station is introduced. And it is pointed out that the national standard “power quality utility grid harmonics” is formulated for the continuous harmonics of utility grid. Since pumped storage Short-term power plant SFC can work and the characteristics of the SFC connection is not a public power grid, there is no need to press the national standard demanding pumping power plant harmonic levels. For the national standard harmonic current limit listed, should be based on the actual short-circuit capacity conversion, this way, even if strictly according to the national standard requirements, 12 pulsation of the SFC program in the harmonic index also completely pass the filter without the need to install Device.