Use cases and Potential of Integrating Battery Energy Storage in Industrial Plants

Using batteries as energy storage is a fundamental practice to promote renewable energy generation and reduce fossil energy consumptions to mitigate greenhouse gas emissions. By integrating grid-connected photovoltaics (PV) and Battery Energy Storage System (BESS) into a local energy system, the renewable energy shares and self-consumption rate of the system can be significantly increased. Especially for high power energy users, e.g., industrial plants, energy storage even provides the possibility of peak shaving to reduce the cost of electricity and network utilization. This paper proposes a general workflow to simulate and optimize the PV-BESS system used for peak shaving in an industrial energy system, which consists of a fabrication plant for electronic devices, together with an attached office building, a battery storage system, and a PV system. The paper presents an innovative method to model the electric load of the system, considering both electric and thermal demand. The electric demand is a time-series model from the actual measurement of production-consumption of various production machines and electric devices in the office. ... mehrThe thermal demand contains the electricity required from the heat pump for cooling and heating. The state-space model describing the thermal behavior of the office building is applied to the calculation. Based on the first simulation results, an energy management strategy is developed to control the proposed system. The management strategy is implemented in a lifetime simulation.

Based on the simulation, the optimization problem considering the economic and environmental impact has been solved to find the optimal configurations, which minimize the annual cost of the system. The Levelized Cost Of Storage (LCOS) is integrated into the objective function. Local feed-in tariffs and environmental policies are also considered in the optimization. The simulation results are assessed in both technical and economic prospects. The optimization result provides an optimal capacity configuration of the PV and BESS system. By applying a suitable size of the PV/BESS system in the proposed industrial plant, it is possible to improve both the economic profitability and the ecological welfare by reducing CO2 emissions.