Integrated battery controller for distributed energy system

In this article, an improved integrated battery energy storage system (BESS) controller for distributed energy system is presented. The BESS is integrated in parallel with the full wave bridge converter into the distributed energy system network. In a normal operating mode, the BESS serves as a power conditioner as well as an active power filter in a distributed power system network. This work presents BESS controller which is designed for regulating the state of charge of the batteries and also to manage the active power in a distributed power system network. The off peak load energy is used to recover the batteries’ state of charge through the BESS controller. In this BESS controller, the constant current–constant voltage (CC–CV) mode is used and it helps to keep the batteries’ state of charge conditions for improving the reliability of the distributed power system system. This control strategy is incorporated into the main converter. The controller helps in managing the phase, amplitude and waveform of the current and voltage on the distributed power system network. The controller ensures the power quality and also assists in improving the power factor with respect to the utility for the intermittent distributed generation as well as the load. In this article, the test results of a prototype system are presented, which validates the proposed controller strategy of BESS in a distributed power system network.

► This work presents an integrated controller for the Battery Energy Storage System, which has extensive applications in the distributed energy systems.
► BESS controller is designed for regulating batteries’ state of charge and also for managing the power in a distributed power system network.
► The controller helps in managing the phase, amplitude and waveform of the current and voltage on the distributed power system network.
► The controller manages the power quality and assists in improving the power factor with respect to the utility for the dynamic load in the distributed energy system.
► The control scheme of this work helps in eliminating the harmonics of distorted (unbalanced) distributed energy system.