Optimal energy management of the photovoltaic based distribution networks considering price responsive loads, energy storage systems and convex power flows.

Nowadays, presence of photovoltaic systems in distribution network is not without challenge and it may not have economic productivity for the system under the lack of optimal management. Energy storage systems are able to cope with this problem. Therefore, in this paper, a new method is proposed for energy management of the distribution networks in order to show that how presence of the energy storage systems leads to profitability and high quality. In this method, the frequent charging/discharging of the energy storage systems is controlled so as to avoid from reduction of their lifetime. Moreover, in the proposed approach the convex power flow constraints are applied for energy management of the photovoltaic based distribution systems in order to guarantee the obtained results’ optimality and convergence. Furthermore, price responsive loads and interruptible ones are modelled in the optimization problem. The proposed approach for energy management is implemented to the 33-bus distribution network and the computed results demonstrate that how considering the energy storage systems in the distribution networks had been effective on improvement of the quality of the economic and technical parameters of the network. The obtained results with considering the importance of energy storage systems lifetime and without it have been compared.