Automatic control method and system for accidental shutdown of pump set of long-distance large-pipe-diameter water delivery pump station

Abstract

The invention discloses an automatic control method and system for accidental shutdown of a pump set of a long-distance large-pipe-diameter water delivery pump station. The automatic control method comprises the steps that system signals, such as the motor bearing temperature, the motor winding temperature, the cooling equipment cold air temperature, the mechanical rotating speed, the pump set bearing temperature, the pump set lubricating oil temperature and the like, of pump station pump set equipment are detected; when any one or more mechanical system signals in the detected motor bearing temperature, the motor winding temperature and other parameters exceeds / exceed a preset value, it is judged that the system has a mechanical fault, and the system is controlled to automatically start a mechanical accident shutdown process; and when any one or more conditions of the motor main protection action, the motor frequency converter fault and the like occurs / occur, it is judged that an electrical accident occurs in the system, and the system is controlled to automatically start an electrical accident shutdown process. According to the automatic control method, a pump set outlet working valve is closed through different processes according to corresponding conditions, the influence of a water hammer on equipment can be effectively reduced, it is guaranteed that water in a pipeline cannot flow back to the pump station, and the pump set is prevented from rotating reversely and damaging the equipment in the station.

Description

technical field [0001] The invention relates to a control method and system for emergency downtime of a pump set in a water transfer pumping station, in particular to an automatic control method for an accidental downtime of a pump set in a long-distance large-diameter water transfer pumping station and a long-distance large-diameter water transfer pumping station Automatic control system for emergency shutdown of pump units. Background technique [0002] The long-distance and large-diameter pipeline transportation business is in the ascendant in China. Due to the advantages of energy saving, environmental protection, low loss, balanced and stable pipeline transportation, it has been welcomed by more and more resource owners. The cost of pipeline transportation is lower than that of road transportation, which can meet the requirements of continuous production in modern factories, and the operating life of pipelines is 30 years, so the economic benefits are considerable. Pip...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that when electrical accidents and mechanical accidents occur in large-scale water transfer projects, the equipment in the pipeline is impacted by water hammer and the water flow in the water lifting pipeline suddenly flows back to the pumping station to damage the equipment during the accident process, and provides The automatic control method and system for accident shutdown of pump sets in long-distance large-diameter water delivery pumping stations can effectively solve the problem of sudden shutdown of long-distance water delivery pipelines in complex terrain, reduce water hammer, and protect pump sets from stopping in a timely and effective manner when accidents occur The pump set prevents the equipment from being damaged by the impact of water hammer, and promotes the safe, stable, efficient and economical operation of the pipeline water transfer system

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