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In this paper, the capability of the numerical relays within the microgrid is sophisticatedly used to adapt the settings of the relays to the status of the microgrid. Different settings for the overcurrent relays are calculated off-line and saved in the relays. Whenever the microgrid is disconnected from the grid, the settings are automatically changed to the associated group of settings. This would...
This paper addresses three aspects of testing relay protection systems using a real time simulator: (1) simplify the setup by using low level analog signals to the relay; (2) use a ‘threading’ process when a hybrid setup (commercial relays and simulated relay models) is chosen; (3) test substation protection system together with control and communication systems.
Because of the fluctuation and intermittence of solar light, output generation of photovoltaic power system keeps continuous change. This determines it can not to be used as main source of frequency regulation like traditional thermal and hydro units. The output generation will be fluctuated rapidly in a large scale when sunlight intensity changes quickly. To make photovoltaic generation better utilized,...
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