考虑宽负载变化的有源电容等效容值控制与损耗分析
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国家自然科学基金资助项目(51777146,51977163)


Equivalent Capacitance Control and Power Loss Analysis of Active Capacitor Considering Wide Load Variation
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    摘要:

    二端口有源电容是一种仅有2个引出端口而无需任何附加电气连接端子的有源电路。然而,基于传统控制方法的有源电容等效容值在理想情况下是无穷大的,这不适用于某些需要精确容值的无源电容应用场合。为此,提出了一种基于二端口有源电容的等效容值控制方法,该方法能根据不同的应用需求实现对有源电容的精准容值控制。首先,对有源电容的阻抗进行建模与分析;然后,通过基于单相整流器的仿真分析,将通过等效容值控制的有源电容与具有相同容值的无源电容进行对比,以验证控制精度;最后,通过与传统有源电容控制方式在功率损耗和动态响应速度方面进行对比,结果验证了所提出等效容值控制方法的有效性。

    Abstract:

    A two-terminal active capacitor is one kind of active circuit, which has only two leading-out terminals and does not require any additional electrically-connected terminals. However, the equivalent capacitance of the existing active capacitor based on the conventional control method is infinite ideally, which is inapplicable to scenarios where the passive capacitors with accurate capacitance values are required. To solve this problem, a novel equivalent capacitance control method based on a two-terminal active capacitor is proposed in this paper, which can realize the accurate capacitance control of the active capacitor according to different application requirements. First, the impedance of an active capacitor is modelled and analyzed. Then, through the simulation analysis based on a single-phase rectifier, the active capacitor under the equivalent capacitance control is compared with a passive capacitor that has the same capacitance value, thus verifying the control accuracy. Finally, the equivalent capacitance control method is compared with the conventional control method for active capacitors in terms of power loss and dynamic response speed, and results verify the effectiveness of the proposed method.

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杨明,朱国荣,邓翔天,王菁,李存中,王浩然.考虑宽负载变化的有源电容等效容值控制与损耗分析[J].电源学报,2020,18(1):176-184

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历史
  • 收稿日期:2019-10-21
  • 最后修改日期:2020-01-06
  • 录用日期:2020-01-06
  • 在线发布日期: 2020-03-06