ABSTRACT
This paper addresses the impacts of high penetration of renewable energy (RE) sources on frequency stability of multi-machine power system. Renewable energy sources are intermittent in nature and they are generally decoupled from the grid at the time of system disturbances which will reduce the overall inertia of the system. This results in reduction of the frequency support available to the grid. Thus, to address the frequency stability issue and to extract the hidden inertia available in the rotor of wind turbine generators, a synthetic inertia control scheme proposed in literature is implemented in this paper. The impact of synthetic inertia control scheme on multi-machine power system consisting of doubly fed induction generators, conventional synchronous generators and solar PV farm is shown by the authors considering modified WSCC 9 bus system. The effectiveness of frequency regulation has been demonstrated by using dynamic simulations in PSCAD/EMTDC software.
