Frequency stability analysis of hybrid power system based on solar PV with SMEs unit

Storage Technology has emerged as main backup powers provider in the era of Smart Grid. Frequency stability analysis of a hybrid power system (HPS) based on solar PV and Superconducting Magnetic Energy Storage system (SMES) unit have discussed in this paper. Generally frequency instability problem occurs due to abrupt variation in load demand growth and generated power variations from different renewable power sources. To Solve these fluctuating problem, renewable power generators are equipped with various storage system. On the bases of frequency stability, effect of enabling the SMEs operation with the HPS has also been analyzed in this paper. HPS model has simulated in two different cases. First one is the steady state analysis with controller and another is dynamic operation of the system throughout a day. Genetic Algorithm is used for optimizing the controller's parameter. In the presence of large disturbance the effect of limited storage capability of SMES unit as large disturbance is also being considered. Matlab/Simulink platform is used for analyzing the HPS model. From Simulation results it is observed that SMES unit can mitigate the frequency fluctuations and improves system stability in both cases for variable PV power and uneven demand loads.