Case Study 3: IDN Substation Feeder Analysis for Enhanced Distribution Efficiency

Problem

The IDN substations were experiencing challenges with voltage stability across their network, prompting a need to analyze feeder performance to identify and address areas with significant voltage drops. The goal was to categorize each substation feeder into voltage drop percentage groups, focusing specifically on those with drops under 5%, to prioritize and allocate resources effectively.

Solution

Our team used line-to-line and line-to-neutral measurements to calculate the total kilovolt-ampere (kVA) load for each feeder. This process involved pairing higher voltages (kV) with lower amperages (Amps) and vice versa, considering the varying voltage levels each feeder handled. This calculation helped us identify feeders with total kVA loads and voltage drops under the crucial 5% threshold.

To simplify the analysis and presentation, we introduced a "relative value" metric—a consolidated figure representing the total kVA load for each station. This metric was crucial in assessing the operational efficiency of each substation and determining the necessary task force allocations based on the specific needs identified.

Result

The analysis culminated in a detailed graphical representation of the total kVA loads for stations with voltage drops under 5%. The graph, presented to utility executives, organized stations alphabetically and showcased the relative value of each station's load. This visual tool was instrumental in facilitating strategic discussions on workforce allocation. It enabled the executives to make informed decisions about where to deploy resources to optimize voltage stability across the network.

By providing a clear and actionable overview of the substations requiring attention, the analysis supported the utility in enhancing its operational efficiency and ensuring a more reliable power distribution to its customers.