Stability Analysis of a Solar PV Connected IEEE 33-Bus ON and OFF Grid Distribution Network

Power system protection and stability is essential for the uninterrupted quality power supply. Overcurrent relay operation and coordination may play a crucial for the protection of electrical networks under fault conditions. It operates as primary and backup protection by coordinating with the switchgear connected in the network. The authors have considered a radial distribution network of the IEEE 33bus system with optimal PV array allocation for the stability and reliability analysis. The solar PV array makes the system reliable after the grid is isolated due to a fault on a bus. The entire system load may not be supplied by the PV array after grid isolation, a system stability threat is observed. A wise relay and circuit breaker operation disconnects industrial loads and keeps the system stable. The PV array will supply the rest of the system using Electrical Transient Analysis Programming (ETAP) simulation software.