What will happen to the voltage when the line between two substations trips while MVARs are flowing from Station A to Station B?

When the line between two substations trips while reactive power (MVARs) is flowing from Station A to Station B, the behavior of the voltages at these points can be understood through the dynamics of reactive power flow and electrical potential.

When reactive power is flowing from Station A to Station B, Station A usually has a higher voltage in order to push that reactive power through the line towards Station B. Therefore, if a fault occurs and the line trips, the reactive power flow is interrupted. The loss of the line means the relationship between the voltages at the two stations will change.

In this scenario, it is expected that Voltage A will remain higher than Voltage B. This is due to the nature of generated reactive power and how it influences voltage levels. The higher voltage at Station A is a characteristic necessary to maintain the flow of reactive power towards a load or into a system, in this case before the interruption occurs.

The other possible outcomes relate to conditions that typically aren't expected under the described circumstances. The voltage levels would not equalize because the disconnection affects more than just the voltage levels; it creates an immediate alteration in the flow dynamics and the stability of the system overall. There wouldn't be a situation of no voltage, as substations typically