| Abstract: | In the light of user-side energy power control requirements, a power control strategy for a household-level EPR
based on HES droop control is proposed, focusing on the on-grid, off-grid and seamless switching process. The
system operating states are divided based on the DC bus voltage information with one converter used as a slack
terminal to stabilize the DC bus voltage and the other converters as power terminals. In the on-grid mode, the GCC
and the HES are used as the main control unit to achieve on-grid stable operation, whereas in the off-grid mode,
the PV, HES and LC are used as the main control unit at different voltages to achieve stable operation of the island
network. Finally, a DC MG system based on a household-level EPR is developed using the PSCAD / EMTDC
simulation platform and the results show that the control strategy can effectively adjust the output of each subunit
and maintain the stability of the DC bus voltage. |
