A Method of Layout Planning for Distribution Automation Terminal Considering the Failure Rate Characteristics

The distribution automation terminal layout planning is an important means to effectively improve the reliability level of distribution network and reduce the operation cost of power grid. The equipment failure rate curve model is established, which reveals the regularity of equipment reliability changing with operating year. The simplified method of distribution network structure blocking is proposed. The simplified calculation method of equivalent failure rate and failure repair repairing time is given, as well as the trouble-shooting procedure under different distribution automation terminals. The calculation method of load outage time between regions is analyzed. The optimization model of the transformation location and transformation mode of distribution automation terminal is established based on the failure rate curve. The actual distribution network system is used as an example to verify the feasibility and superiority of the proposed method, which provides a theoretical basis for practical projects.