CAJ | 학술논문

分布式电源（DR）在配电网中的高度渗透，使传统的配网保护与控制面临极大的困难，对此提出了一种基于高级馈线终端单元（Advanced Feeder Terminal Unit, AFTU）的保护控制技术。根据DR容量和负荷大小，预先将含DR的配电网络划分为若干能孤岛运行的区域。在馈线出口、DR接入位置以及区域边界处装设断路器和AFTU，AFTU之间通过光纤网络互联。各AFTU实时检测本地信息，并与相邻的AFTU进行信息交互。根据本地及临近的信息，可快速定位故障区段，实现故障的隔离及孤岛运行。利用相关的信息，设计了重合闸和孤岛再并网控制策略。案例分析说明了所提分布式保护控制方案的可行性。
분포식전원（DR）재배전망중적고도삼투，사전통적배망보호여공제면림겁대적곤난，대차제출료일충기우고급궤선종단단원（Advanced Feeder Terminal Unit, AFTU）적보호공제기술。근거DR용량화부하대소，예선장함DR적배전망락화분위약간능고도운행적구역。재궤선출구、DR접입위치이급구역변계처장설단로기화AFTU，AFTU지간통과광섬망락호련。각AFTU실시검측본지신식，병여상린적AFTU진행신식교호。근거본지급림근적신식，가쾌속정위고장구단，실현고장적격리급고도운행。이용상관적신식，설계료중합갑화고도재병망공제책략。안례분석설명료소제분포식보호공제방안적가행성。
The protection and control of distribution grid faces a serious challenge due to the integration of high penetration rate distributed resource (DR). This paper proposes an advanced feeder terminal unit (AFTU) based protection and control scheme. According to the capacities of DR and load, the distribution network is divided into several zones in advance, which may operate in islanded mode. At the beginning of feeder, the point of common coupling of DR and the border of zone, the circuit breakers and AFTUs are installed, and the adjacent AFTUs are connected by the optic fiber. Each AFTU detects the local information and exchanges the information with the adjacent AFTUs in real time. According to the information, AFTU can fast locate the fault section, and realizes the isolation of fault section and the islanded operation. Using the related information, the control strategy of reclose and re-connection of DR is design. Case analysis shows that the proposed protection and control scheme is feasible.