Distribution systems reliability and economic improvement with different electric energy storage control strategies

With the rapid development of electric energy storage (EES) technologies, there is a growing interest in integrating these into distribution systems to improve their reliability and economy. Different control strategies of EES have corresponding reliability and economic impacts on the system. In this paper, the reliability and economy of radial distribution system integrated with EES are assessed. The control strategy of utilizing EES as a standby backup energy resource is analyzed. This standby backup control strategy improves system reliability the most but falls short on economy improvement. A novel MPC-based control strategy is presented, which can maximize distribution system economy but could not improve reliability as much as the standby backup control strategy. A hybrid control strategy of balancing the reliability and economy improvement by combining the standby backup control strategy and MPC-based control strategy is presented. The reliability and economic analysis of distribution system integrated with EES using proposed control strategies illustrates the effectiveness of the proposed method. It also illustrates that even with the same EES integrated into the distribution system, different control strategies have very different reliability and economic impact on the system. In order to accurately assess the impact of the implemented control strategies, sequential Monte Carlo Simulation is used and implemented EES control operations are included in the simulation.