Mid And Long-Term Combining Scheduling And Sharing Compensation Benefits Of Cascade Hydro-Power Stations

As more and more large and medium hydro-power stations are put into operation in our country,the joint dispatching of cascaded hydro-power plants has begun to receive more and more attention.Especially,the upstream hydro-power stations can compensate and adjust the downstream hydro-power stations at all levels,which can increase the scheduling of the entire cascade power generation,with considerable power generation compensation benefits.With the cascade stations in the middle reaches of the Jinsha River put into operation,the cascade of the middle and lower reaches of the Jinsha River will be added to the core of the Sanxia Hydro-power Stations to maximize the combined benefits of power generation,water supply,flood control,social and ecological control of the entire hydro-power stations cluster.First,a case study of four hydro-power stations in the Jinsha River is carried out to explore the efficiency and rationality of the cascade combined generation.A cascade combined optimal model with the maximum generating capacity is established,solving the model by the modified GA-POA method,and compared with traditional GA and POA to highlight the rationality of combining GA and POA,and calculating the compensation benefits.Choosing and calculating the typical year as Wet Year,Normal Year and Dry Year from annual runoff data.The differences between the calculated results of different representative years are compared.The results show that:The joint scheduling can significantly improve the overall power generation of the cascade,and effectively increase the power output of the downstream hydro-power plants in the dry period.It can also make the discharge process of the entire cascade of the river basin tend to be gentle,and increase the utilization of water and reduce the amount of waste water in the dry season.Besides,it can increase the utilization rate of average water to meet the requirements of Wet Year>Normal Year>Dry Year,and alleviate the flood control pressure in flood season to a certain extent.Second,in order to make compensation benefits distribution of cascade hydro-power stations more reasonable and mobilize the stations' enthusiasm participating in joint operation,that is,to make the benefits maximum and take the fairness into consideration,the combination of the Critic Weight Analysis Method and Shapley Value Method is proposed in this paper.The Critic-Shapley model is established by comparing with the Single Index Method,the Deviation Square Method and the Shapley Method,which is applied to compensation benefits sharing of three hydro-power stations in Jinsha river cascade,as a reference for operating the joint.The results show that this method has the following two advantages:First,it not only takes the benefits into consideration,but also focuses on the differences between the stations,which is in favor of downstream power plants at all levels participating in joint operation;Second,The distribution results value the leading power plant's role enough,which is in favor of achieving the joint operation and maximum benefits of basin cascade.