SUN Lizheng,WANG Feng,XU Ziyi,et al.Control Parameter Design of Virtual DC Machine for DC/DC Converter Based on Equivalent Reduced-order Model[J].Automation of Electric Power Systems,2024,48(24):124-135.
SUN Lizheng,WANG Feng,XU Ziyi,et al.Control Parameter Design of Virtual DC Machine for DC/DC Converter Based on Equivalent Reduced-order Model[J].Automation of Electric Power Systems,2024,48(24):124-135. DOI: 10.7500/AEPS20231013001.
Control Parameter Design of Virtual DC Machine for DC/DC Converter Based on Equivalent Reduced-order Model
The virtual DC machine (VDCM) control is widely used in DC/DC converters to enhance the inertia of the DC system and suppress the sudden change of DC bus voltage. However
it also has some problems such as complicated models and difficult parameter setting. Aiming at these problems
this paper proposes a systematic design method of VDCM control parameters based on the equivalent reduced-order model for the bidirectional DC/DC converter connected to the energy storage device in the DC distribution system. First
according to the mechanical and electromagnetic equations of the DC machine
a full-order small-signal model of VDCM control is established
and the influence of the variation of control parameters such as inertia coefficient and damping coefficient on the dynamic characteristics of VDCM is qualitatively analyzed. Through the rational simplification of the VDCM control process
the equivalent reduced-order small-signal model is obtained. On this basis
the analytical expression of VDCM control parameters on the dynamic performance indicators of the DC voltage is derived
and the feasible region of control parameters is constructed to guide the parameter design. Finally
the feasibility of the proposed parameter feasible region construction and parameter design methods is verified on the RT-LAB hardware-in-the-loop experimental platform.
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Related Institution
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