Analysis of the influence of load to islanding passive detection method

In the view of Under/over voltage, Under/over frequency are the key ways of anti-islanding both to passive and active methods, a further research and study of the influence of load to Under/over voltage, Under/over frequency ways were shown in this paper. It can be seen clearly how the load influents the islanding state, and on the other hand, from the islanding detected value we can get the load information so it can guide us to choose what kind of active method. At last Simulation has been used to test the analysis.