CAJ | 학술논문

大量分布式电源(distributed generation，DG)接入配电网导致系统元件数量的增加和系统状态数目的增大，为停电风险评估在含DG配电网中的实施带来困难。为此，提出一种基于设备随机故障的含 DG 配电网停电风险快速评估方法。为加快评估速度，在系统状态抽样环节引入拉丁超立方抽样技术(Latin hypercube sampling，LHS)，通过对配电网各系统变量实施分区、抽样、排序的方式得到用于停电风险评估的系统状态；通过定义负荷点的贡献度与消耗度2个孤岛划分参量，削弱了孤岛划分算法中负荷点接线结构对算法快速性的影响，进而提出了能同时满足快速性和精确性要求的孤岛划分方法。从充裕性角度建立了配电网停电风险的指标体系，并制定了相应的风险评价标准。算例结果表明，提出的快速评估方法能反映含DG配电网的停电风险程度，可为电网规划及运行人员提供参考。
대량분포식전원(distributed generation，DG)접입배전망도치계통원건수량적증가화계통상태수목적증대，위정전풍험평고재함DG배전망중적실시대래곤난。위차，제출일충기우설비수궤고장적함 DG 배전망정전풍험쾌속평고방법。위가쾌평고속도，재계통상태추양배절인입랍정초립방추양기술(Latin hypercube sampling，LHS)，통과대배전망각계통변량실시분구、추양、배서적방식득도용우정전풍험평고적계통상태；통과정의부하점적공헌도여소모도2개고도화분삼량，삭약료고도화분산법중부하점접선결구대산법쾌속성적영향，진이제출료능동시만족쾌속성화정학성요구적고도화분방법。종충유성각도건립료배전망정전풍험적지표체계，병제정료상응적풍험평개표준。산례결과표명，제출적쾌속평고방법능반영함DG배전망적정전풍험정도，가위전망규화급운행인원제공삼고。
A large number of grid-connected distributed generations (DGs) have brought increase of components’ number and system states of power distribution network, which makes risk assessment of distribution network containing DGs difficult. Therefore, based on components’ stochastic failures a fast power failure risk assessment method for smart distribution network is proposed. In order to speed up assessment, Latin hypercube sampling (LHS) technology is adopted in the process of system states sampling. Through partitioning, sampling and ranking of system variables, system states used for power failure risk assessment can be obtained. On the basis, an island partition strategy which satisfies the requirement on quickness and accuracy is proposed, and two new parameters, respectively named load point contribution and consumption, are defined which can weaken the impact of load points’ connection structure on algorithm rapidity. The index system of power failure risk and power failure risk assessment standard are established. The simulation results show that the proposed method can provide power failure risk degree which can give reference for planning and operating staff.