Maximum Penetration Level Computation of Distributed Generators in Distribution Network Considering Tap Hunting Constraints

With many distributed generators connecting to power system for satisfying the increasing electricity demand,the maximum penetration level computation of distributed generators as well as the evaluation of their influence on power system becomes extremely necessary.Based on the discrete equation of the tap change under load(TCUL)transformers and the impact on the tap action caused by distributed generators,a optimization model is proposed considering tap hunting constraints.Furthermore,the computation of maximum penetration level is analyzed considering the distributed generators disconnected due to outage.It is also presented that reactive power compensation can improve the penetration level.The validity of the proposed model is proved by the simulation result from IEEE 112-bus system.