In order to ensure joint operation of wind-PV-hydro complementary generation system with cascade hydro-power owned by multiple stakeholders, an equitable and efficient allocating mechanism for incremental benefit is of great importance. Firstly, the incremental benefit from joint operation is quantified for wind-PV-hydro complementary generation system with cascade hydro-power owned by multiple stakeholders in this paper. Then, different allocation methods such as proportional method, marginal benefits method, last addition method, Shapley value method, and Aumann-Shapley value method are applied to allocate the incremental benefit for each stakeholder. Next, a 4-stakeholder wind-PV-hydro complementary generation test system is employed to investigate the advantages and disadvantages of the presented different allocation methods and a 9-stakeholder wind-PV-hydro complementary generation test system is used to verify that Aumann-Shapley value method can reduce computational burden with regard to the participation of large number of stakeholders compared with traditional cooperative game-based method such as Shapley value method. INDEX TERMS Incremental benefit allocation, wind-PV-hydro complementary generation, cascade hydropower, multiple stakeholders, Aumann-Shapley value. NOMENCLATURE A. SETS Allocation result of stakeholder n under Shapley value method. π wd,i,t,k Marginal benefit of k-th segment of wind resource of wind generator i during period t. π pv,i,t,k Marginal benefit of k-th segment of solar resource of PV module i during period t. π Q,i,t,k Marginal benefit of k-th segment of water discharge resource of hydro generator i during period t. π V ,i,t,k Marginal benefit of k-th segment of reservoir resource of hydro generator i during period t.