Water level adjusting apparatus in hydraulic power plant
专利汇可以提供Water level adjusting apparatus in hydraulic power plant专利检索，专利查询，专利分析的服务。并且PURPOSE:To maintain system frequency by increasing gain of either one of water level adjusting signal or frequency responsive signal when they vary by a predetermined deviation or more. CONSTITUTION:When water level is in H'WL or more or L'WL or less, the water level is in overflow level or stopping level or less due to the variation of system frequency. Hence the gain of water level adjusting signals S1 is increased to lower the gain of frequency responsive signal S2 and have priority thereto. Namely a relay contact X2 is opened. Next, when frequency is deviated by a predetermined range or more, the gain of frequency responsive signal S2 is increased under the condition that the water level is between H'WL and L'WL and the gain of water level adjusting signal S1 is lowered to restrain the system osillation. Namely a relay contact X3 is closed.，下面是Water level adjusting apparatus in hydraulic power plant专利的具体信息内容。
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4 电缆封闭结构
