发电机并机时无功异常升高的原因分析及处理

Analysis and processing of generator incorporates when the idle work exceptionally elevates

通过对发电机并机时无功异常升高原因的分析,发现电压差过大是引起发电机并机时无功升高的重要原因,进一步分析,发现在自动准同期装置检验上存在盲目的10%误区和SID-2V自动准同期装置在定值设置上存在的不合理,建议对自动准同期装置定值中电压差值的计算一定要考虑变压器变比与电压互感器变比之间的实际误差,以保证发电机的正常并机,避免发电机受到过大电动力的冲击。

With reason analysis to the incorporated generator when the reactive power exceptionally elevates, this paper discovers that larger voltage difference is causes of the reactive power＇s ascension when the incorporation. By further analyzing, it is found in the automatic quasi-synchronous device checkout, there is 10% erroneous zone and the SID-2V device exists unreasonable setting value. It suggests the voltage interpolation computation needs certainly consider the error between transformer ratio and the current transformer ratio to ensure the generator incorporation accurate and avert the generator not to impact by largest electromotive force.