What is the main purpose of performing tie line flow error checks?

The main purpose of performing tie line flow error checks is to maintain correct interchange schedules. Tie lines connect different utility systems, allowing for the transfer of power between them. Accurate measurements and monitoring of the flow across these lines are essential to ensure that the agreed-upon interchange schedules are being adhered to. This is crucial for balancing supply and demand between interconnected systems, avoiding imbalances that could lead to outages or reliability issues.

Maintaining proper interchange schedules ensures that each utility meets its obligations and manages its resources efficiently. By performing these checks, system operators can identify any discrepancies in the scheduled versus actual flow, allowing for timely corrections and coordination between neighboring systems.

Other options, while relevant in different contexts, do not directly relate to the primary purpose of tie line flow error checks. Load forecasting pertains to predicting future electricity demand rather than directly monitoring the operations of interchange schedules. Similarly, energy efficiency and billing accuracy, though important aspects of overall system operations and finance, are not the focus of tie line flow error assessments.