Optimization Analysis and Experiment Verification of Current Transformer Power Supply Based on Starting Current

LOU Jie; CHEN Changtao

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Optimization Analysis and Experiment Verification of Current Transformer Power Supply Based on Starting Current

更新时间：2025-12-08

- Optimization Analysis and Experiment Verification of Current Transformer Power Supply Based on Starting Current
- Vol. 44, Issue 6, Pages: 1774-1781(2018)
- 作者机构：
  
  1. 山东大学电气工程学院
  2. 国网日照供电公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：10 July 2018，
  
  Published：2018
- 稿件说明：
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LOU Jie, CHEN Changtao. Optimization Analysis and Experiment Verification of Current Transformer Power Supply Based on Starting Current[J]. 2018, 44(6): 1774-1781.
DOI：

LOU Jie, CHEN Changtao. Optimization Analysis and Experiment Verification of Current Transformer Power Supply Based on Starting Current[J]. 2018, 44(6): 1774-1781. DOI：

摘要

为提高电流互感器（TA）取能电源在启动电流附近时的取能效率、降低死区

推导了其输出功率与滤波电容电压及匝数的关系。并以取能电源最低输出0.5 W为目标

通过软件仿真了在启动电流附近时滤波电容电压及匝数对TA输出功率的影响。得出在不考虑整流桥压降时最大功率与匝数无关。而实际上由于整流桥压降的原因

最大功率与匝数的关系曲线具有饱和特性

并由此给出了二次侧匝数的最优取值依据。通过分析TA取能电源工作点的稳定性问题

得出其稳定工作点为滤波电容电压较高的点

并分析了取能电源在启动电流附近可能出现的无法输出正常功率的现象

进而提出了对DC-DC电路进行控制的方法以保证在该电流时正常启动。最后

设计了一套完整的TA取能装置

通过实验验证了所作分析的正确性。

Abstract

In order to improve the efficiency of current transformer power supply in the vicinity of starting current and to reduce the dead zone

we derived a relationship among the output power

filter capacitor voltage

and turns. Then

taking the minimum output power 0.5 W as the target

we simulated the influence of filter capacitor voltage and turns on output power in the vicinity of starting current. It is concluded that the maximum power is independent of turns when the voltage drop of rectifier is not considered. However

due to the voltage drop of real rectifier

the curve of maximum power and turns has saturation characteristic

and the turns are determined according to it. It is obtained that the stable operating point is the point of higher filter capacitor voltage by analyzing the stability of the operating point on the output power curve of current transformer. The phenomenon that the power supply may not be able to output normal power in the vicinity of starting current is analyzed

and the solution of controlling the starting of DC-DC circuit is given. A circuit is designed

and the correctness of the analysis is verified by experiments.

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