摘要
速饱和电流互感器取能是解决智能断路器在电网短路失压状态下供电的主要方法。本文分析与研究了速饱和电流互感器的工作特性和饱和机理,建立了电流互感器取能的等效电路模型。提出了电流互感器铁心饱和度的概念,深入研究了电流互感器输出功率与铁心饱和度的关系。通过仿真研究,验证了理论推导的正确性。在此基础上提出了速饱和电流互感器的设计步骤,包括铁心工作饱和度选择、铁心有效导磁截面积以及二次绕组匝数的设计方法。搭建了速饱和电流互感器取能电路,通过实验验证了设计方法的可行性。
Fast-saturation current transformer energy extraction is the main method to solve the power supply problem of intelligent circuit breaker under the condition of short circuit and voltage loss in power grid.This paper analyzes and studies the working characteristics and saturation mechanism of fast-saturation current transformer,and establishes the equivalent circuit model of current transformer energy extraction.The concept of current transformer iron core saturation is proposed,and the relationship between current transformer output power and iron core saturation is deeply studied.Through simulation research,the correctness of theoretical deduction is verified.On this basis,the design steps of the fast-saturation current transformer are put forward,including the selection of iron core working saturation,the effective magnetic conduction cross-sectional area of the iron core and the design method of secondary winding turns.The energy extraction circuit of fast-saturation current transformer is built,and the feasibility of the design method is verified by experiments.
作者
史凯萌
宗鸣
SHI Kai-meng;ZONG Ming(School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870,China)
出处
《电工电能新技术》
CSCD
北大核心
2020年第6期74-80,共7页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51777129)。
关键词
速饱和电流互感器
电流互感器取能
铁心饱和度
智能断路器
fast-saturation current transformer
current transformer energy harvesting
core saturation
intelligent circuit breaker
