| This paper mainly studies how the three-phase current dynamic balancing device tracks the current and stabilizes the DC side voltage.The device realizes stable system operation while realizing compensation of unbalanced current in real time.As a newly developed three-phase current dynamic balancing device,the current tracking strategy must be accurate and does not affect the stable operation of the system,while the DC side bus voltage control strategy directly affects the operation of the device.This paper analyzes the two control strategies adopted by the device and explains why the control strategy with the composite control strategy as the core is adopted.A Matlab model of three-phase current dynamic balancing device is established.It consists of a total device model,a capacitor regulator control model,and a three-phase four-wire load model.The total model of the device is the Matlab model of the three-phase current dynamic balancing device,which includes the capacitor voltage regulation control model.The function of the three-phase four-wire load model is to verify the simulation results.The results show that the device can track the unbalanced current in real time,compensate the unbalanced component,and additionally compensate the harmonic components under the premise of stable system operation.The development of the device has a positive significance for the operation of the grid.The modeling and simulation of the three-phase current dynamic balancing device is an important method to understand and verify the compensation of the unbalanced current,and also the feasibility of understanding the current tracking control strategy and the DC side bus voltage control strategy.Therefore,the three-phase current dynamic balancing device studied in this paper is modeled and simulated in the Simulink environment of Matlab software.The simulation results verify the correctness and feasibility of the current-voltage control strategy based on the composite control strategy. |
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