Optimal allocation of reactive power sources using network partitioning

Reactive power cannot be transmitted over long distances and voltage stability is considered as more of local problem rather than a global problem. So this paper presents a new method of combining network partitioning and voltage stability sensitivity index for optimal allocation of reactive sources to enhance voltage stability. The concept of electrical distance is introduced for network partitioning, partitioning a power network into strongly connected sub-networks. By applying this approach, the reactive sources can be allocated most reasonable, reactive compensation balance in every zone. The simulation results indicated that the method is practicable and effective to improve the voltage stability of power systems.