CAJ | 학술논문

　　充分考虑电池储能系统（BESS）的充放电效益对变电站扩容建设的推迟作用，建立了变电站扩容建设和BESS容量配置的协调规划模型。新模型基于一个含风电场的典型地区配电网络及其日负荷曲线，考虑了购电费用和BESS与变电站扩容的综合投资运行费用目标，同时还考虑了BESS的充放电特点和网络的安全约束。其中对于变电站扩容容量包含给定待选与连续可调两种情况。该模型是一个多时段非线性规划问题，在变电站扩容容量为给定待选的情况下还包含整数变量，需将其转换为含互补约束条件的连续优化问题，再采用原对偶解耦内点法将其解耦为单时段优化问题进行协调迭代求解。算例结果表明该方法可以有效减小电网的扩容投资，并实现储能系统容量的优化配置。
　　충분고필전지저능계통（BESS）적충방전효익대변전참확용건설적추지작용，건립료변전참확용건설화BESS용량배치적협조규화모형。신모형기우일개함풍전장적전형지구배전망락급기일부하곡선，고필료구전비용화BESS여변전참확용적종합투자운행비용목표，동시환고필료BESS적충방전특점화망락적안전약속。기중대우변전참확용용량포함급정대선여련속가조량충정황。해모형시일개다시단비선성규화문제，재변전참확용용량위급정대선적정황하환포함정수변량，수장기전환위함호보약속조건적련속우화문제，재채용원대우해우내점법장기해우위단시단우화문제진행협조질대구해。산례결과표명해방법가이유효감소전망적확용투자，병실현저능계통용량적우화배치。
A coordinated planning model of substation expansion and battery energy storage system (BESS) sizing is proposed, fully considering the effect of BESS charging and discharging on deferring substation expansion. Based on a typical distribution network and its daily load, the objective of the proposed model is to minimize the power purchase costs and the investment and operation costs of BESS and substation. The charging and discharging characteristics of BESS and the network security constraints are included. Candidate discrete/continuous expansion capacity are both considered. It is a multi-period nonlinear mixed-integer programming problem, containing integer variables especially when discrete expansion capacity is considered, which is converted to a continuous optimization problem with complementarities constraints. The decomposed primal-dual interior point method is used to solve the model iteratively and coordinatively, which is decomposed to several single period optimization problems. The case results show that the proposed method can effectively reduce the investment of grid expansion, and optimize the sizing of BESS.