Traceability Analysis and Protection of Pump Stop Water Hammer Accident in Pump Station
In order to study the influence of the closing time and type of the two-stage slow-closing check valve on the pump-stopping water hammer,the pumping station in the Gaotangping separated pumped storage project in Lanshan County is taken as an example.Based on the working principle of two-stage slow closing check valves,a numerical simu-lation method is used to trace and analyze the causes of pump stop water hammer accidents,and to compare the protective effects of hydraulic control butterfly valves and multi-functional water pump control valves under different working condi-tions on pump stop water hammer under the same total valve closing time.The results show that the unreasonable valve closing law of the hydraulic control butterfly valve is the main cause of the water hammer accident.Compared with the hydraulic control butterfly valve,the adaptive valve closing mode of the one-stage zero flow rate of the multifunctional pump control valve under different working conditions can significantly reduce the water hammer peak under the pump stopping condition.The water hammer curve of stopping pump after replacing the multi-functional pump control valve is obtained by field measurement.The multi-functional pump control valve effectively solves the problem of water hammer protection of pumping station and improves the safety resilience of pumping station.
separated pumped storage power stationpump stop water hammertraceabilitymultifunctional water pump control valvehydraulic control butterfly valve
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NSTL
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