Abstract:
With the continuous increase in the load, the frequency of the system goes on decreasing and it reaches to its minimum allowable value after the further increase in load will result in more frequent drop resulting in the need of load shedding. To avoid load shedding and control of the frequency of the systems some approach have discussed here. The paper includes modeling of SMES with solar PV array for frequency control of three areas interconnected thermal system in deregulated environment. A comparative analysis of different load frequency control scheme such as:Using conventional integral controllerUsing PID controller,Using additional sources of energy (PV with SMES) on the basis of load to be shed have been discussed. The effects of bilateral contracts on the dynamics of a system including three areas, each of which consisting of two GENCOS and two Discos has been discussed. A case study of contract violation of DISCO's also being incorporated. For all the three strategies the critical load at which frequency of the areas tries to go below minimum allowable range also has been calculated. With the help of MATLAB software using Simulink, results have been obtained. From the comparison results indicates that on using the third strategy (with additional sources) we are increasing the efficiency of the system. When using system with PID controller and additional sources, frequency of the system doesn't go below minimum allowable range and there is requirement of load shedding has been eliminated.
