CAJ | 학술논문

分布式电源及储能系统的并网运行使配电网供电恢复更加复杂。基于功率可控分布式电源及储能系统倍率放电、荷电状态与孤岛运行时间等因素，提出了孤岛运行约束条件及孤岛备用容量模型；提出了以恢复供电负荷最大为目标函数，考虑孤岛运行备用容量约束、无电磁环网运行约束、支路潮流及节点电压约束的配电网供电恢复模型。结合配电网辐射状网络、负荷依次接入的特征，提出了逐步最优的改进贪婪算法，分别以可供电功率最大与线损微增率最小为选择判据，求解故障后配电网网络重构与孤岛划分。通过算例验证了考虑孤岛并网备用容量的供电恢复模型与改进贪婪算法，并对算法效率进行了比较分析。
분포식전원급저능계통적병망운행사배전망공전회복경가복잡。기우공솔가공분포식전원급저능계통배솔방전、하전상태여고도운행시간등인소，제출료고도운행약속조건급고도비용용량모형；제출료이회복공전부하최대위목표함수，고필고도운행비용용량약속、무전자배망운행약속、지로조류급절점전압약속적배전망공전회복모형。결합배전망복사상망락、부하의차접입적특정，제출료축보최우적개진탐람산법，분별이가공전공솔최대여선손미증솔최소위선택판거，구해고장후배전망망락중구여고도화분。통과산례험증료고필고도병망비용용량적공전회복모형여개진탐람산법，병대산법효솔진행료비교분석。
Grid-connected operation of distributed generators (DG) and energy storage systems (ESS) make power restoration of distributed network more complex.Constraint conditions of isolated island operation and the reserved capacity model for the isolated island are proposed based on power-adj ustable DG and ESS and considering high rate discharging,charging state of ESS and operation time of isolated island.A power restoring model for distributed network is put forward with maximum restored power load as the obj ective function and the constraints of reserved capacity,open-loop,line flow and node voltage taken into account.An improved greedy algorithm of the power supply area for power restoration is presented based on the radical network and the characteristic of step by step load access,which is applied in operating reconfiguration and islanding of faulty distribution line with maximum power supply capacity and minimum line loss rate as the criteria for selection.Two typical cases are studied to test and verify the model and algorithm,and the efficiency of the algorithm is analyzed and compared with other algorithms.