Frequency control design for two-areas network connected with HVDC

Regulating frequency deviation is one of the most important issues in power systems. For this purpose, it is necessary to maintain the balance between demand and supply power in real time. Governors change inputs of turbines when frequency variation is caused by a load change. But, in an overload condition, the governor cannot control the frequency drop because of its slow response. In this paper, a new control strategy for two connected systems with HVDC is proposed. The performance of the control system has been validated by simulations of normal operation and overload conditions in MATLAB/Simulink.