Study On Optimization Of Operation Control Of Cascade Pumping Station In Long-distance Water Transmission System

In long-distance water delivery projects,cascade pumping stations are an indispensable link.However,due to the complex structure,close internal connections,and many influencing factors of this type of project,it is extremely difficult to control during operation,and this type of large-scale water delivery The project also needs to operate as economically as possible under the premise of ensuring safety to bring out better social and economic benefits.In this paper,the following researches are carried out on the optimization of cascade pumping station operation and control and the optimization of emergency dispatching:On the basis of reviewing the research progress at home and abroad,this paper introduces the optimization of operation scheduling of cascade pumping station engineering and the theory and research status of emergency scheduling of cascade pumping station accidents,laying the foundation for follow-up work.Aiming at the optimization problem of economic operation of cascade pumping stations,this paper takes the lowest energy consumption of normal water supply operation of cascade pumping stations as the optimization goal,establishes an optimization model for operation regulation of cascade pumping stations,and uses intelligent optimization algorithms to solve the problem through reasonable distribution of heads,combined with the characteristics of variable frequency pumps.Realize the optimal scheduling of pump stations at all levels.The results are verified by physical test models,and it is found that the energy consumption of cascade pumping stations can be effectively reduced.According to the actual operation process,when the required flow rate of the cascade pumping station is small,the combined operation mode of multi-stage pumping stations is adopted.Tests have proved that this can not only improve the operating efficiency of the single-stage pumping station,but also effectively reduce the pumping cost of the cascade pumping system.,To achieve the purpose of economic operation.In view of the emergency safety dispatch of cascade pumping station accidents,the hydraulic transition process of this long-distance water delivery cascade pumping station system is very complicated,and the response to the accident is relatively slow.Once an emergency accident occurs,the pump shutdown problem is prone to water hammer,and the consequences are extremely serious.serious.This paper analyzes the hydraulic transition process of pumping stations at all levels in accordance with the emergency situation of cascade pumping stations in the long-distance water transmission system,and proposes water hammer protection measures according to the characteristics of the pumping stations at all levels,and according to the characteristics of the actual engineering,The optimized hydraulic transition process was analyzed and an emergency accident optimization plan was established.Based on the theoretical analysis and research results,the operation optimization of the cascade pumping station of the long-distance water transmission system still needs to be studied in depth.