机组甩负荷时EH油压低的原因及处理

The Reason and Solution for the Low EH Oil Pressure in Off-Loads Unit

宣威电厂五期扩建2×300MW 工程八号机组在甩负荷试验时,EH 油压低,其主要原因是控制调门的电液伺服阀关闭时间与电磁快关阀不相匹配,通过对 DEH 操作回路的改变,达到了预期的目的。

EH oil pressure of No.8 unit in Xuan Wei power plant drops when it performs loading off test. The main reason is the shut down time of the electro-hydraulic servomotor that controls the governing valve doesn't suit to that of the electromagnetic fast valve.By reforming DEH operating circuit;we have reached the expectant purpose.