基于线性功率放大器的直流电流阶跃源实现技术  

Realization of DC Current Step Source Based on Linear Power Amplifier

作　　者：翟少磊 崔野 李方青 王任 苏文婧 李树斌 ZHAI Shao-lei;CUI Ye;LI Fang-qing;WANG Ren;SU Wen-jing;LI Shu-bin(Electric Power Research Institute,Yunnan Power Grid Co.,Ltd.;Shandong Nuclear Power Co.,Ltd.;College of Humanities,Qujing Medical College;North China Electric Power University;Kunming Luquan Power Supply Bureau)

机构地区：[1]云南电网有限责任公司电力科学研究院 [2]山东核电有限公司 [3]曲靖医学高等专科学校人文学院 [4]华北电力大学 [5]昆明禄劝供电局

出　　处：《化工自动化及仪表》2023年第3期331-335,共5页Control and Instruments in Chemical Industry

摘　　要：依据直流电流互感器关于暂态阶跃的测试指标及定义,针对现有直流电流阶跃源存在的问题,提出一种基于线性功率放大器软硬件相结合的直流电流阶跃电源。通过分析线性功率放大器架构、电流输出原理和暂态特性,对硬件电路中的滤波回路、功率管分布电容和负载阻抗进行优化,以获得最佳阶跃电流输出效果,通过控制线性功率放大器的输入电压来获得测试所需的阶跃电流波形。直流电流阶跃源在现场进行直流电流互感器暂态阶跃响应试验的结果,证实了技术方案的可行性。Basing on both test index and definition for the transient step of DC current transformer and considering the problems in the existing DC current step source,a DC current step power supply based on the combination of linear power amplifier’s software and hardware was proposed.Through analyzing linear power amplifier’s architecture,the principle of current output and transient characteristics,the hardware loop’s filter circuit,the distributed capacitance of the power tube and the load impedance were optimized to obtain the best step current output effect,including having input voltage of the linear power amplifier controlled to obtain step current waveform required for the test.The transient step response test of the DC current transformer carried out on the site for the DC current step source verified the technical scheme’s feasibility.

关 键 词：直流电流互感器 直流电流阶跃源 线性功率放大 阶跃电流 暂态阶跃响应测试 

分 类 号：TH862.7[机械工程—仪器科学与技术] TM93[机械工程—精密仪器及机械]