Weak bus determination and real power loss minimization using Grey wolf optimization

A new optimization algorithm approach is proposed named Grey wolf optimization algorithm for the solution of reactive power planning (RPP) of a connected power network based on the detection of weak buses determined by line stability index method and Fast voltage stability index. The optimization algorithm is then applied on standard IEEE 30 and IEEE 57 bus system. The objective of the proposed work is to minimize active power loss and operating cost by proper coordination of reactive power generation of the generators, transformer tap setting positions and shunt capacitors placed at the weak buses of the system while maintaining voltage profile within acceptable limit. Finally, it is observed that reactive power planning with line stability index method yields better result than planning with fast voltage stability index.