Abstract
Combined with the development trend and application background of DC distribution network, this paper presents a topology of a two-terminal DC distribution network with AC/DC converter, and analyzes the characteristics and advantages of the topology. The voltage type PWM rectifier is mathematically modeled, and then the simplified mathematical model of the PWM rectifier in the rotating dq coordinate system is analyzed. The double closed-loop control based on PI is proposed to realize the DC voltage stability control under load disturbance. In the Matlab/Simulink simulation environment, the simulation model of DC distribution network is established, and the operating conditions of the research are simulated. The simulation results verify the correctness and effectiveness of the proposed control strategy. The double-ended distribution network proposed in this paper provides a stable and reliable supply voltage for the power supply equipment of the DC distribution network.
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