岩滩水电厂3号机并网瞬间吸收有功功率原因分析

Reason Analysis on Absorption of System Active Power at Grid-connected Transient

针对岩滩水电厂3号机组在并网瞬间从系统吸收有功功率现象进行分析,通过探讨发电机在并网瞬间的运行工况、结合机组并网瞬间曲线图,认为3号机组并网瞬间机组频率低于系统频率是吸收有功的主要原因,并由此提出了预防措施。

An analysis is made on absorption of system active power at the grid-connected transient based on No.3 unit of Yantan Hydropower Station.Through a study on the operating conditions of generator and the curve at the transient,it is regarded that the system active power is absorbed by No.3 unit due to the generator frequency is lower than the system frequency.Finally,a preventive measure is proposed in this paper.