Design of Active Power Based Relay Algorithm to Overcome Transient Instability: 220 kV Amravati Substation Case Study

Abstract

This paper presents a new protective scheme, i.e. new relay algorithm to protect small scale generators against transient instability. The demand of installing small generators in distribution networks has been increased now-a-days. Small scale generators have low inertia constant. The inertia constant minimizes the frequency deviation which depends on the kinetic energy. Therefore frequency dynamics becomes slower and hence it increases the response time to react to fault events. Due to this, transient stability is considered as important concept for small scale generators. Due to occurrence of faults in power system, it hampers the transient stability. A new relay algorithm has been presented to prevent against transient instability for small scale generator. The active power based relay algorithm uses a generator active power to disconnect the generator from the system in three phase fault. Finally, the obtained results have been validated for the 220 kV Amravati Substation.

Keywords: Transient stability, active power, active power based relay algorithm, out of synchronism, single to line ground fault, three phase fault

Cite this Article

Sneha M. Walondre, N. D. Ghawghawe. Design of Active Power Based Relay Algorithm to Overcome Transient Instability: 220 kV Amravati Substation Case Study. Journal of Power Electronics and Power Systems. 2016; 6(2): 64–73p.