Enhancing Micro-Grid Reliability in Industrial Distribution Feeders by Generating Bus Splitting

This paper investigates reliability and control of an Industrial Micro-Grid (IMG) system engaged to provide uninterrupted and quality power to export-oriented industries in Chattogram Export Processing Zone (CEPZ) and Karnaphuli Export Processing Zone (KEPZ). The uninterrupted and reliable power supply is crucial for the operation of these industries within CEPZ and KEPZ, which collectively demand a maximum of 100 MW out of which 72 MW is made available from its internal power generating source and additional 28 MW is sourced from the regional national power grid. Despite the demand for uninterrupted power, frequent tripping of this IMG due to various faults originating from consumer ends has posed a significant challenge for its trusted reliability. To mitigate this issue within a tolerable limit, a tactful solution called Generating Bus Splitting (GBS) was proposed. It involves the dis-integrating and relocating of one of the master feeders from its Central Generation Bus (CGB) to rationally distribute fault burden concentration. This model offers several advantages, including grid shifting loss reduction, improved grid dispatch, mainly contributing to the enhancing IMG reliability by reducing its total blackout, and enhanced emergency power interruption handling capabilities.