Improvement of reliability of power distribution system by information exchange between distributed generators-sharing of all DG´s information

The large scale introduction of DGs (distributed generators) might allow the power supply to the distribution system to be continued even if it is disconnected from the upper transmission system. In our previous paper, we discussed the effect of information exchange between DGs to reduce the fluctuation after islanding from the upper system, where two DGs are coupled to share the information with each other. In this paper, we discuss the information exchange where all DGs share the information indirectly. As a result, the reduction of stabilization time by the indirect sharing of all DGs information is smaller than the reduction by coupling only two DGs with different response speed. However, the indirect sharing of all DGs information has less dependence on the combination of DGs in terms of reduction of the frequency fluctuation. Even in the case where some of the information exchange lines fail, the stabilization time hardly increases.