| Summary: | The introduction of a large amount of photovoltaic power generation reduces the load on the entire system when the low frequency load is interrupted, but the photovoltaic power generation connected to the relevant line is also separated, so that it becomes an independent operation in the partial system, and the supply power is also reduced. There is a possibility of reduction. In conventional UFLS, after observing the frequency, the load is cut off in units of several seconds. The load shedding amount is determined by the load ratio of the entire system at that time. In this study, the UFLS model will be added to the existing IEEJ AGC30. The demand and solar power output in the target area are divided into substations to create data, and the solar power output of each substation is taken into account to grasp a more accurate load. The validity of this model is verified by simulating frequency fluctuation and LFC operation.
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