Automatic air supplement system and air supplement method for oil pressure device of hydropower station

Abstract

The invention discloses an automatic air supplement system and air supplement method for an oil pressure device of a hydropower station. A pressure and pressure difference transmitter is used for measuring and processing pressure and oil level parameters of a pressure oil tank, a traditional contact pressure meter or a mechanical pressure relay and a float annunciator which are adjusted difficultly and fatigued and damaged easily are replaced, and accordingly, pressure and oil level parameters of the pressure oil tank can be measured reliably and continuously. A programmable logic controller and peripheral apparatuses serve as a measuring and control center of the oil pressure device, the traditional relay logic control is changed into intelligent computer program control, and accordingly, control of various working conditions and processing and transmission of information of the oil pressure device can be completed automatically and reliably, and a real automatic air supplement function based on reliable measuring of pressure and oil levels of the pressure oil tank can be implemented.

Description

technical field [0001] The invention relates to an automatic gas supply system and a gas supply method of an oil pressure device of a hydropower station. Background technique [0002] The oil pressure device of the governor of the hydropower station is an indispensable and important auxiliary equipment for the operation of the turbine unit. It can generate and store high-pressure oil, and it is the energy source for the unit to start, stop, and adjust the load. The pressure oil provided by the hydraulic device must have sufficient energy, and at the same time ensure that the system works reliably. In order to ensure and maintain the working capacity required for the operation of the unit, the proportion of compressed air and turbine oil in the pressure oil tank should be appropriate according to the requirements. Compressed air accounts for 60% to 70%, and turbine oil accounts for 30% to 40%. If the ratio cannot be reliably guaranteed, there will be strong vibration damage ...

AI Technical Summary

Problems solved by technology

Relatively speaking, it is easier to maintain the ratio of oil pumped by the oil pump, but it is very difficult to realize the ratio of automatic gas replenishment to maintain the gas ratio. In the past, hydropower stations relied on manual gas replenishment, and the disadvantages are obvious.

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