| The change of power energy structure has promoted the development in the field of ancillary service,but also led to the traditional ancillary services facing severe challenges.The energy storage system(ESS)has the excellent characteristics of fast response,flexible and controllable,bidirectional regulation,and so on.It is a high-quality regulating resource in the field of ancillary service.The location and capacity allocation of energy storage are crucial problems in planning research,and its planning solution will directly affect the economic and technical benefits of energy storage.It is of great practical significance to study the optimal allocation of ESS for ancillary service,which is conducive to the participation of energy storage in the ancillary service market and maintaining effective competitiveness.In this paper,the optimal allocation solutions of ESS participating in the ancillary service of the virtual power plant(VPP)and the receiving-end grid are studied.(1)Aiming at the energy management ancillary service that ESS to participates in improving the operation revenue of VPP,an optimal allocation method of ESS for VPP is proposed.Firstly,considering the market rules and operation characteristics of the VPP,a bi-level optimization model is established to determine the optimal location and capacity of ESS.Secondly,an interactive algorithm based on the decomposition-coordination algorithm is designed to improve the computational efficiency of the optimization problem for ESS allocation.Finally,a simulation example of the IEEE-17 VPP system is given,and the effectiveness of the proposed model and method is verified by comparing the planning results of different allocation methods.(2)For the transient stable ancillary service that ESS participates in improving the power receiving capacity,the optimal allocation method of ESS for the receiving-end grid is proposed.Firstly,the influence of DC blocking fault on the receiving capacity of the power grid is analyzed.Secondly,the optimal allocation model of ESS considering transient stability is established by introducing the difference form of transient stability constraints.Finally,the optimal allocation of ESS with transient constraints is solved,and the New England 39-buses system is used to verify the proposed model and method.The simulation results show that the ESS can effectively improve the receiving capacity of the receiving-end grid,and verify the effectiveness of the proposed ESS allocation method for the receiving-end grid. |
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