Frequency transient analysis of countrywide blackout of Bangladesh Power System on 1st November, 2014

Abstract

In this paper, real time frequency transient analysis with respect to frequency control of Bangladesh Power System (BPS) countrywide blackout on 1st November, 2014 is presented which occurred after HVDC station tripped. The inertia constant of a system can be a significant tool for investigating the frequency stability of a system and the frequency transient of power system is a vital index for power system operation and research. The dynamic frequency characteristic of power system is the basis of many important design works such as the design of under frequency load shedding scheme. Therefore, it is obvious and essential to analyze the dynamic frequency characteristic of BPS before countrywide blackout after disturbance. This paper first analysis real time frequency transient and determine the system inertia. Secondly it shows that maintaining nominal level of inertial reserve in real-time operations with unit commitment which can be crucial to ensure stable, secure and reliable operation of BPS. Beside this under frequency scheme should be revised and controlled. BPS network disintegration along with rate of change of frequency should be ensured for adaptive as well as self-healing of the power system.