基于DSP的断路器脱扣电流检测和校验技术研究  

Study on Detecting and Checking Technology of Circuit Breaker Tripping Current Based on DSP

作　　者：王宗亮[1] 孙俊忠[1] 蔡巍[1] WANG Zong-liang;SUN Jun-zhong;CAI Wei(Power Operation Department,PLA Navy Submarine Academy,Qingdao 266199,China)

机构地区：[1]海军潜艇学院动力操纵系,山东青岛266199

出　　处：《测控技术》2020年第7期78-82,共5页Measurement & Control Technology

摘　　要：为了验证断路器的过流保护和短路保护功能,准确掌握断路器的工作状态,研制了一套基于DSP和电力电子最新控制技术的断路器校验装置。利用DSP进行试验参数计算和SPWM控制,试验电流由IGBT组成的逆变器产生,通过交流采样算法,根据采样电压和电流计算出负载的功率因数,使得试验电流波形的相位角初值精确可控,有效保证了断路器电磁脱扣试验的电流精度;设计了专用的上位机操作软件和数据库,可完成试验参数设置、试验过程的引导、电压电流波形的显示与存储、断路器动作时间的显示、历史数据查询等功能,实现了试验电流波形的实时采集和精准控制,为断路器的工作可靠性提供了可靠的检测手段。In order to verify the overcurrent protection and short-circuit protection functions of the circuit breaker and accurately grasp its working state,a set of circuit breaker calibration device based on DSP and the latest control technology of power electronics is developed.The DSP was used to calculate the test parameters and control the SPWM.The test current was generated by the inverter composed of IGBTs.Through the AC sampling algorithm,the power factor of the load was calculated according to the sampling voltage and current,so that the initial value of the phase angle of the test current waveform can be accurately controlled,which effectively guaranteed the current accuracy of the electromagnetic trip test of the circuit breaker.A special PC operation software and database were designed,which can complete the test parameters setting,test process guidance,voltage and current waveform display and storage,circuit breaker action time display,historical data query and other functions.The real-time acquisition and precise control of the test current waveform are realized,and a reliable detection means is provided for the working reliability of the circuit breaker.

关 键 词：DSP 断路器 脱扣电流 检测和校验 

分 类 号：TM561[电气工程—电器]