基于联络关系的主变故障负荷转供方案

针对主变故障后负荷转供过程中联络线路容量不足、主变过载等问题,提出了一种基于联络关系的主变故障负荷转供方案。该方案在配电网正常运行情况下,利用简化的网络拓扑关系形成主变联络关系矩阵及负荷转移区域,当主变因故障或检修退出运行时,基于负荷转移小区容载比对故障主变负荷进行"按需分配"。在分配的过程中,充分计及了联络线路及主变容量约束条件,分别设计了次级负荷转供策略及二次转供策略。算例结果表明,该方案有效地提高了配电网设备利用率和负荷转供能力,同时,使负荷转供后配电网中的负荷分布更加均衡。

Power restoration scheme for main transformer fault based on the interconnection relationship

In order to solve the problems such as insufficient interconnection capacity, overload of main transformer and so forth during the power supply recovering process after main transformer fault, this paper presents a novel power restoration scheme based on interconnection relationship capability. This scheme firstly forms main transformer interconnection matrix and conforms load transfer area by using simplified network topology relationship. When the main transformer is out of operation due to failure or maintenance, the load of faulted main transformer is distributed basing on the capacity-load ratio of the load transfer district. In the process of distribution, sub-load transfer strategy is proposed aiming at the constraint of interconnection capacity and secondary transfer strategy aiming at the constraint of main transformer capacity. Simulation results verify that the scheme can effectively improve the equipment utilization ratio of distribution network and load transfer capability, besides, the load distribution is more balanced.