Float switch type free flow discharge forecast device for upper reservoir dam of pumped storage power plant

Abstract

The invention relates to a float switch type free flow discharge forecast device for an upper reservoir dam of a pumped storage power plant, and aims at providing the float switch type free flow discharge forecast device capable of raising the alarm reliably and quickly when free flow discharge occurs. The technical scheme provided by the invention is that the device comprises a control loop and an alarm loop, wherein the control loop comprises a relay, a control loop power supply and a float switch; the float switch is vertically fixed in an overflow dam section to be tested or near an upstream dam surface of the dam section, and achieves on-off according to a dam-front water level of the upper reservoir; one end of the control loop power supply is electrically connected with one end of a relay coil, and the other end is connected with the float switch in series and then electrically connected with the other end of the relay coil; the alarm loop comprises an alarm loop power supply; one end of the power supply is electrically connected with one contact reed of the relay, and the other end is connected with an alarm device in series and then electrically connected to another contact reed of the relay. The float switch type free flow discharge forecast device is suitable for hydraulic and hydro-power engineering.

Description

technical field [0001] The invention relates to an alarm device for monitoring and predicting the free discharge of the upper reservoir dam of a pumped storage power station, in particular to a float switch type free discharge monitoring device for the upper reservoir dam of a pumped storage power station, which is mainly applicable to Water conservancy and hydropower projects. Background technique [0002] The flood discharge facility of the upper reservoir dam of the pumped storage power station is usually designed in the form of an overflow weir without gate control. When the water level in front of the dam exceeds the weir crest elevation due to overpumping of the upper reservoir, the reservoir water will flow freely through the overflow weir surface , not only brings economic loss to the power plant, but also causes a certain degree of loss to the energy dissipation work, and even poses a safety hazard. If the free discharge of the upper reservoir dam occurs or is abou...

AI Technical Summary

Problems solved by technology

[0003] At present, although the domestic pumped storage power stations have been equipped with upper and lower reservoir water level measuring and reporting devices, the water level at the monitoring point may not necessarily represent the water level in front of the dam, and the alarm function of most water level measuring and reporting devices is not perfect, lacking on-site alarm and Therefore, it is necessary to design an independent monitoring and forecasting device to provide a reliable and rapid way for the power plant to obtain information on whether free discharge of the dam has occurred or is about to occur, and at the same time provide power for the existing conventional water level measuring and reporting devices A backup measurement and reporting method provided under special circumstances such as interruption, line damage or sensor failure

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