Multiobjective Planning of Recloser-Based Protection Systems on DG Enhanced Feeders

In the past few years, distribution automation has become very important in the planning and operation of power distribution systems. Network operators (NOPs) look for feeder topology and appropriate configuration of the system for improved reliability and provision of complete energy demand. However, in order to realize an effective protection system, sufficient investment is required for equipment such as resealers, fuses and segmenters. As a result, two conflicting goals, namely NOP investment minimization and maximum reliability, became clear.

Radial system is a widely used economic system that is common in low load density areas. In order to shorten the downtime it is possible to protect the overhead feeder by an automatic reclosing device located at various places on substation or feeder line. If the fault is temporary, the unit restarts the feeder. To further shorten the duration and range of customer interruption, attach a segment fuse to the branch of the radial feeder and leave the unaffected part of the feeder in use.

The feeder is made up of parts - each part is useful. The main line is the main line of the feeder, usually a three phase line. It is usually designed for nominal 400 A and accidental 600 A load. Three-phase or single phase extends in the transverse direction from the trunk line. The landscape is a branch that connects to the main line and processes the load. Landscape can have its own landscape. To protect the main line from side faults, these are usually disconnected or switched by remote recloser. The most common configuration of the feeder is a 4-wire Y configuration, with each phase of the three phases having a single conductor and a strong multi-ground neutral conductor. However, the less common configuration is a 3-line Y shape and a triangle configuration. The 4-wire Y-shaped configuration is widely used for its safety and easy fault protection. With this circuit type, it is possible to use equipment below the rated voltage, use the relative ground voltage, and ground fault protection.