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Due to the high energy consumption in the traditional AC-DC hybrid microgrid, the benefit evaluation may be difficult. In this paper, an AC-DC low-voltage hybrid distribution network suitable for distributed photovoltaic power generation access is proposed. DC power directly supplies DC household appliances, and AC power grid directly supplies AC appliances. In this way, the loss of electric energy in the process of energy conversion can be reduced, and good economy can be achieved. The 24-pulse thyristor bidirectional converter is used in the connection between AC and DC power grids, which can reduce the loss and prevent the failure of benefit evaluation. The photovoltaic low-voltage distribution tracking adopts conductance increment method, and the converter control adopts constant voltage control to maintain the bus voltage stability. The simulation results prove the feasibility of the scheme.

A Benefit Evaluation Model for Peak-Clipping Benefits of Distributed Photovoltaic Grids Taking into Account Uncertain Low-Voltage Distribution