Application Study of Film Capacitor of DC Link Capacitor in EAST Vertical Stabilization Control Power Supply

A large number of electrolytic capacitors are applied in DC link of EAST vertical stabilization control power supply (VSPS), which become the reliability weak links of the power supply. An appropriate film capacitor is selected to take place of electrolytic capacitor applied in DC link. The criteria for calculation of capacitance according to energy storage and ripple current absorption for sizing the DC link are given. The feasibility of the selection of the capacitor is proven in MATLAB simulation in various operation conditions.

EAST垂直稳定控制电源（VSPS）的直流母线环节大量应用电解电容器，此类元件成为该电源可靠性的薄弱环节。为此选取适配的薄膜电容器替代直流母线环节中的电解电容器。文中给出了基于储能与纹波吸收需求的直流母线电容选型计算准则，并在多种运行工况下通过MATLAB仿真验证了该电容选型方案的可行性。