How to maintain long-term voltage stability based on under-voltage load shedding?

For long-term voltage stability, the proposed technique achieved optimal under-voltage load shedding. On the basis of the technical and economic priority of loads, an optimal UVLS scheme is generated, which is capable of maintaining predefined voltage stability. The proposed technique works satisfactorily on the IEEE 14- and 118-bus test systems.

Can undervoltage load shedding reduce active power curtailment?

A new undervoltage load shedding method to reduce active power curtailment presented in a previous study. 123

What is under voltage load shedding (UVLS)?

To avoid this problem, the proper corrective measures called load shedding is required. In critical and extreme emergencies, under voltage load shedding (UVLS) is performed as a final remedy to avoid a larger scale voltage collapse. Therefore, UVLS is considered state of the art to achieve voltage stability.

Does a voltage collapse lead to a blackout state?

A voltage collapse, in turn, leads to a blackout state. 9, 41 Technical and economic viewpoints on UVLS schemes are discussed in another study. 18 If the voltage collapse is expected, UVLS is the most appropriate countermeasure for avoidance. 49 - 51 The load is usually the determinant of voltage instability.

How to achieve optimal load shedding and enhanced voltage stability?

Optimal load shedding and enhanced voltage stability were achieved by the combination of modal analysis and PSO technique. 116 Best tap setting of the transformer in the initial stage prevention control is used with the help of PSO optimization and achieved the best possible voltage stability margin.

What is voltage collapse?

Voltage collapse is a severe form of system instability, which could affect many components of the power systems; in fact, it may involve an entire power system voltage collapse that usually occurs when reactive power demand is higher than that of the supply attributed to the lack of reactive power sources.