用于智能量测开关的超宽输入DC-DC模块研究  

Research of Ultra Wide Input DC-DC Module for Smart Measurement Switch Application

作　　者：方磊 楚成博 朱肖晶 何映虹 杨慧敏 FANG Lei;CHU Chengbo;ZHU Xiaojing;HE Yinghong;YANG Huimin(State Grid Jiangsu Electric Power Co.,Ltd.Nanjing Power Supply Company,Nanjing 210008,Jiangsu,China;School of Electrical Engineering,Southeast University,Nangjing 210096,Jiangsu,China)

机构地区：[1]国网江苏省电力有限公司南京供电分公司,江苏南京210008 [2]东南大学电气工程学院,江苏南京210096

出　　处：《电气传动》2024年第7期22-27,共6页Electric Drive

基　　金：国家重点研发计划项目(No.2018YFB1500800)。

摘　　要：为了解决智能量测开关内部自取电电流互感器输出电压变化大的问题,需要在后级级联具有超宽输入电压范围的DC-DC模块来产生稳定的系统供电电压。研究了一种基于恒定开通时间控制和断续模式非同步Buck电路的超宽输入DC-DC模块。根据输入电压和输出电压的差距大小,采用变频和准定频分段控制方式。实现大压差功率变换的同时,该DC-DC模块还具有极快的动态响应。利用PSIM软件对DC-DC模块电路的特性进行仿真分析和验证。研制了一台功率为5 W的硬件样机进行测试,给出了部分关键实验波形。实验结果表明,该DC-DC模块具有输入范围超宽、动态响应极快和稳定性高的特点。In order to address the issue of large output voltage variation from self-powered current transformer in smart measurement switch,ultra wide input voltage range post-stage DC-DC module is required to generate stable system voltage rails.A ultra wide input DC-DC module based on constant on-time control and asynchronous Buck circuit operating in discontinuous mode was proposed.Accroding to the gap between intput voltage and output voltage,variable frequency control and quasi-fixed freqency control were combined.With large voltage gap conversion realized,this DC-DC module also features super fast dynamic response.PSIM software was used to analyze and verify the characteristics of the propsed DC-DC module.A 5 W hardware prototype was fabricated and tested to produce key experimental waveforms.The experimental results demonstrate that the proposed DC-DC module has features of ultra wide input range,super fast dynamic response and high stability.

关 键 词：智能量测开关 超宽输入范围 恒定开通时间 断续模式 DC-DC模块 

分 类 号：TM76[电气工程—电力系统及自动化]