FGMO Trial for frequency regulation in Bangladesh Power System

Abstract

Load and generation balance exactly in nominal frequency is a rare phenomenon for any power system. Frequency regulation is to maintain the balance between demand and supply in real time. Power Grid Company of Bangladesh (PGCB) is the transmission Grid operator for Bangladesh power system (BPS). PGCB tries to maintain a near real-time balance between generation and load and adjusts generation to manage power flows through interconnected transmission lines. PGCB do not have any primary or supplementary control for frequency regulation rather it does manually with the help of their own IP phone network. The frequency of BPS continuously fluctuates to a big extent because of absence of primary control (governor action) for frequency regulation. That's why the NLDC (National Load Dispatch Centre) of PGCB has a tendency to run the system at little bit higher than nominal frequency, so that they can be advantageous during contingencies. But operating power system in this way is waste of huge amount of primary energy. To overcome these difficulties, PGCB thought about free governor mode of operation (FGMO) and arranged a first time weeklong real-time trial on BPS for practical understanding about primary control for frequency regulation. In this Paper, an investigation is made on this trial to demonstrate frequency regulation and generator response by adopting Free Governor Mode of Operation.