Multi-Objective Optimal Operation Considering Voltage Stability for Unit Commitment

Abstract

Nowadays renewable energy is becoming very familiar by providing a lot of benefits in the power system as well as environment. However, renewable generations like Photovoltaic (PV), Wind generation (WG) output power depends on the weather conditions that causes power generation uncertainly because changing weather condition determines the output power of the renewables generation. As we know, most of electric power companies have been introduced renewable energy that will increase the power system uncertainty simply. Therefore, it is predicted that this uncertainty will increase the likelihood of voltage instability and voltage collapse. On the other hand, renewable energies have great contribution to save power producer from completion by reducing per unit operation cost. Electric unity company requires to an optimal operation to maximize the profit that is why Unit Commitment (UC) becomes an important issue in recent decade. Also, fluctuations in supply and demand are increased by the introduction of renewable energy. Thus, we suggest the optimal operation method of the generator and the energy storage for Unit Commitment by considering the voltage stability in this research. Besides, a battery storage system has been proposed by using this devices, the power fluctuation can be reduced. The effectiveness of the proposed method is verified by simulation results in the Matlab/simulink.