the Back-to-Back Problem

The Back-to-Back Problem in power systems occurs when two large generating units are connected sequentially to the same substation or bus without enough separation or buffering. This configuration can cause stability issues and fluctuations in voltage or power flow, especially if one unit trips or operates unexpectedly. Essentially, the close coupling means the units influence each other strongly, raising risks of instability, oscillations, or system failures during disturbances. Proper system design and control strategies are essential to prevent these problems and ensure reliable power delivery.