In order to improve the stability of electric system of electric tracked vehicle,asmall signal analysis method based on impedance modelis used to model the DC microgrid system built by power electronic source network load and storage of electric tracked vehicle.Combined with the working conditions of electric tracked vehicle,the stability rule and mechanism of the system under different working conditions and different parameters are analyzed from the perspective of impedance matching.At the same time,in order to optimize and improve the stability of electric system for the electric tracked vehicle,a voltage-based feedback channel and a virtual capacitor control link are designed in the engine-generator set and DC/DC control loop,respectively.Thecontrol link can adapt to the voltage fluctuation for control,thus improving the stability of electric system in the electric tracked vehicle.Finally,the effectiveness and feasibility of the proposed method are verified by simulation.
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