Optimal sizing of wind/solar mix for supply security of active power distribution systems

Planning of renewable resources is an essential study in active power distribution systems. In this paper, an optimal sizing of wind/solar mix is presented with the consideration of the security of the generation resources. The proposed methodology employs the negative correlation between solar and wind output power to ensure a certain level of supply security and load fulfillment. The effect of formulating the design optimization problem on the optimal wind/solar mix and power system operation is addressed. The IEEE 38-bus system with selected candidate locations for renewable resources demonstrates the proposed design methodology. The forward/backward sweep power flow technique is used to evaluate the obtained design results. Minimizing the squared difference between generated power and load demand, as the objective function led to a significant performance in meeting load demand without degrading the power system operational constraints.