In order to effectively solve the problems of voltage overrun,line overload and bidirectional flow of distribution netword currents caused by new energy photovoltaic(PV)access to the distribution network,adistribution network optimization method based on the coordination demand response(DR)and soft open point(SOP)with energy storagesystem(ESS)is proposed.Firstly,the DR and SOP models based on ESS are constructed,and the multi-temporal optimization model is constructed after PV access to the distribution network by considering the maximum power of the new energy PV accessed to the distribution network,theminimum loss of the SOP itself,and the minimum cost of the operation and maintenance of ESS as the optimization objective function;Then,the distribution network optimization model is transformed intomixed-integer second-order conic programming(MISOCP)problem using second-order cone relaxation technique,and the transformed model is solved by calling the MOSEK algorithm package through MATLAB.Finally,the IEEE 33-node distribution network optimization model is used for example simulation validation,and the corresponding distribution network optimization models under different control strategies are compared and analyzed.The example simulation results show that the distribution network optimization method based on the joint action of DR and SOP based on ESS proposed in this paper can achieve the smoothing of peak and valley load differences and improve the voltage quality of the distribution network,and enhance the acceptance capacity of the distribution network after the access of new energy PV under the premise of guaranteeing the security of the distribution network system.
关键词
需求响应/智能软开关/新能源光伏/配电网优化/二阶锥松弛技术
Key words
demandresponse(DR)/soft open point(SOP)/photovoltaic(PV)/distribution network optimization/mixed-integer second-order conic programming(MISOCP)
维普
万方数据