Construction of Dynamic Fluctuation Load Model and Simulation with AFC-control of BTB Interconnection

Abstract

AFC control on BTB active power flow, which is in phase with frequency deviations both in Hokuriku AC power system and in the rest of the power system of middle and west Japan, can effectively reduce frequency fluctuations. In the first section of this paper, test measurement result of actual largescale power system fluctuation load is shown and dynamic fluctuation load model is derived from the study on the test result. Then we analyze effectiveness of this AFC control to suppress frequency fluctuation in the two AC power system through computations of static and dynamic simulations by using the derived model on MATLAB. Our simulation analyses reveal that effectivenss of frequency fluctuation suppression by the AFC control on BTB active power depends on the capacity scale of AC power system interconnected with BTB system: We conducted these computations on different states of power systems which represent summer-peak, winter-peak, typical spring-peak and summer-night. We confirmed that frequency fluctuation can be significantly reduced in the smaller capacity power system by setting larger AFC gain.