Study Of Impact Of Frequency Deviation On Power System

The operation and the development of power system networks introduce new types of stability problems.  The effect of the power generation and consumption on the frequency of the power system can be described as a demand/generation imbalance resulting from a sudden increase/decrease in the demand and/or generation. This paper investigates the impact of a loss of generation on the transient behaviour of the power grid frequency. A simplified power system model is proposed to examine the impact of change of the main generation system parameters (system inertia, governor droop setting, load damping constant, and the high-pressure steam turbine power fraction), on the primary frequency response in responding to the disturbance of a 1.32 GW generation loss on the power grid. Various rates of primary frequency responses are simulated via adjusting system parameters of the synchronous generators to enable the controlled generators providing a fast-reliable primary frequency response within 10 s after a loss of generation. It is concluded that a generation system inertia and a governor droop setting are the most dominant parameters that effect the system frequency response after a loss of generation.  recent power systems have become a widely interconnected and complicated network, containing thousands of buses and generating stations. In order to provide the required power, it is required to extend the power network by adding new power generating and transmission lines. Due to economic and environmental constraints of new installations for generators and load demand growth, the transmission lines flow on existing transmission lines have increased, leading to risks of losing frequency stability and system blackout. This paper presents an overview on the impact of frequency deviation on power system.