基于数字直接频率合成的B型剩余电流动作特性测试装置
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摘要
针对现有B型剩余电流动作特性测试装置适应性相对较弱的问题,对任意波形剩余电流动作特性测试技术进行了研究。在分析剩余电流动作保护电器测试要求的基础上,提出了一种基于直接数字合成(DDS)技术的B型剩余电流动作特性测试装置,该装置以DSP和FPGA为控制核心,采用数字直接频率合成技术产生了任意波形剩余电流信号,并用PID反馈控制方法实现了恒流输出。设计结果表明:剩余电流动作特性测试装置剩余电流频率范围可达1 k Hz,输出电流有效值达到30 A,满足相关标准要求。
Aiming at the issue of less adaptability of conventional test equipment for type B residual current device,a direct digital synthesizer( DDS) based test equipment was put forward according to the test requirement. Arbitrary waveforms of residual current could be generated accurately benefit from the well-designed DDS signal generator,which was controlled by DSP and FPGA microcontrollers. In order to stabilize the output current,a PID based feedback control strategy was introduced. The results indicate that the test equipment can output arbitrary residual current with a frequency bandwidth of 1 k Hz,and current range of 0 ～ 30 A,so as to meet the requirements of the relevant standards for residual current device.
Aiming at the issue of less adaptability of conventional test equipment for type B residual current device,a direct digital synthesizer( DDS) based test equipment was put forward according to the test requirement. Arbitrary waveforms of residual current could be generated accurately benefit from the well-designed DDS signal generator,which was controlled by DSP and FPGA microcontrollers. In order to stabilize the output current,a PID based feedback control strategy was introduced. The results indicate that the test equipment can output arbitrary residual current with a frequency bandwidth of 1 k Hz,and current range of 0 ～ 30 A,so as to meet the requirements of the relevant standards for residual current device.
引文
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[2]任长宁.国内外电气防火检测规范比较及分析[J].建筑电气,2011(8):47-53.
[3]陈磊.电气火灾监控系统的设置[J].现代建筑电气,2011(2):43-45.
[4]公安部消防局.中国火灾统计年鉴[M].北京:中国人事出版社,2016.
[5]公安部消防局.中国火灾统计年鉴[M].北京:中国人事出版社,2017.
[6]李霏,顾含,董庆丰.电特性检测在电机预防性检修和故障诊断中的应用研究[J].机电工程,2018,35(4):402-406.
[7] IEC62423-2009. Type F and type B residual current operated circuit-breakers with and without integral overcurrent protection for household and similar uses[S]. Geneva:IEC,2009.
[8]王建新,林时放,胡乐晨. AC型剩余电流保护器大电流特性试验装置的研制[J].低压电器,2010(13):52-55.
[9]张军伟,李奎,王卿粹.复杂波形剩余电流波形保护器的设计[J].电器与能效管理技术,2012(20):20-24.
[10]胡敏,高孝天. B型剩余电流动作断路器测试仪的研究与设计[J].电器与能效管理技术,2016(13):28-32.
[11] GB 22794.家用和类似用途的不带和带过电流保护的B型剩余电流动作断路器(B型RCCB和B型RCBO)[S].北京:中国标准出版社,2008.
[12] GB/T 14048. 2-2008.低压开关设备和控制设备第2部分:断路器[S].北京:中国标准出版社,2008.
[13]李安阳,杨文生,何敏.基于FPGA和DSP的高精度多通道信号检测系统硬件设计[J].机电工程,2016,33(10):1277-1282.
[14]王尧,李奎,任伯飞,等.基于全相位傅里叶变换的磁调制交直流漏电电流检测方法[J].电工技术学报,2015,30(18):254-260.
[15] FAGER C,HALLBERG W,ZEN M,,et al. Design of linear and efficient power amplifiers by generalization of the Doherty theory[C]. 2017 IEEE Topical Conference New York:IEEE,2017.
[16] JEONG G,JOO T,HONG S,et al. A highly linear and Efficient COMS power amplifier with cascode-cascade configuration[J]. IEEE Microwave and Wireless Components Letters,2017,27(6):596-598.