Hybrid Protection Scheme Based Optimal Overcurrent Relay Coordination Strategy for RE Integrated Power Distribution Grid

An Integrated Protection Scheme for Distribution Systems Based on Overcurrent Relay Principle

This paper reports on the development of integrated protection for power system. The background of the development is firstly introduced, in which a centralized protection system (or relay) provides the protection of multiple power plant or a substation. A novel integrated protection scheme for distribution system based on overcurrent protection technique is described. In the proposed scheme, s...

A Novel Flux-Based Protection Scheme for Power Transformers

Internal Turn-Turn faults (TTF) are the most common failures in power transformers, which could seriously reduce their life expectancy. Although common protection schemes such as current-baseddifferential protection are able to detect some of the internal faults, some other minor ones (such as TTFs andshort circuit near the neutral point) cannot be detected by such schemes. Likewise, these rela...

Considering Pilot Protection in the Optimal Coordination of Distance and Directional Overcurrent Relays

The aim of the relay coordination is that protection systems detect and isolate the faulted part as fast and selective as possible. On the other hand, in order to reduce the fault clearing time, distance protection relays are usually equipped with pilot protection schemes. Such schemes can be considered in the distance and directional overcurrent relays (D&DOCRs) coordination to achieve faster ...

Distribution System Feeder Overcurrent Protection

Application of Artificial Bees Colony Algorithm for Optimal Overcurrent Relay Coordination Problems

This paper presents optimal coordination of overcurrent relays by using artificial bees colony algorithm. The objective function of the relay coordination problem is to minimize the operation time of associated relays in the systems. The control variables used in this paper are the pickup current and time dial setting of relays. The proposed method was tested with four systems study consists 5-...