Solar PV Battery Based System for Telecom Tower Application

The telecom tower depends upon the diesel generator as backup power to meet its load demand. This work presents the control of the solar PV battery system to reduce the dependability of the telecom sector on the DG set. This solar PV-battery system is used as backup power to meet the load demand when the supply from the AC utility is not available as it works in both grid connected (GC) and standalone (SA) mode. The system operates smoothly when it’s working mode is shifted from GC to SA and vice versa. It also improves the voltage profile at the point of common coupling (PCC) and utility current profile by mitigating the power quality problems caused by the nonlinear loads used in a telecom tower. An adaptive algorithm is presented to control the system in GC mode and a proportional resonant (PR) controller-based control algorithm is used in SA mode. The battery bank provides the support to the load in the SA mode when the solar PV generation is not sufficient, and it charges as soon as the utility supply reappears so that it has enough energy to supply power to the load in the SA mode. The system performance and the control algorithm have effectiveness validated through both simulation and experiment results.