Optimal dispatch of power system considering uncertainty of both source and load sides and N-1 security constraint
Large-scale wind power grid integration increases the uncertainties of system operation.It is urgent to use rapidly adjustable resources to smooth the power imbalance caused by wind power and load fluctuation and consider the impact of spinning reserve calling process on the system power flow.Firstly,the probability distribution model of wind power and load prediction error is analyzed.Then,the optimal dispatching model of power system with N-1 network security opportunity constraint and spinning reserve opportunity constraint is established,and the unit output is optimized with the goal of minimizing the total dispatching cost.Finally,the Benders decomposition method based on the identification method of active integer variables is used to deal with the N-1 network security constraints to improve the solving efficiency.Using the modified IEEE30-node test system,it is verified that the proposed model can guarantee the reserve availability,economy and safety of the system,and fully excavate the fast adjustable capacity of pumped storage.
integration of wind powerN-1 securityspinning reserveoptimal dispatch
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