智能电力检测仪的系统抗干扰设施研究

Research of Intelligent Electric Power Monitor's System

为了使智能电力检测仪稳定运行,针对破坏系统正常运行的电网谐波干扰,以及信号传输引起的干扰、系统电源回路的脉冲干扰、空间干扰,采取了相应的硬件和软件抗干扰设施。硬件方面主要有屏蔽浮地技术、接地技术、信号出入端加设RC滤波器、控制器的输入电源采用低通滤波器等技术;软件方面主要有NOP指令、设置自检程序、WATCHDOG、软件陷阱和指令冗余等技术。从而大大提高了智能电力检测仪的系统抗干扰能力,对提高该系统的抗干扰性能有一定的实用价值。

In order to make the intelligent power detector operate steadily,we adopted corresponding anti-interference facilities,namely,hardware and software,against the interferences,which would damage the normal operation of the system.Such as network harmonic interference,the interference caused by Signal transmission,the impulse interference of system power circuit,space interference.In the aspect of the hardware,it mainly has shield floating technology,grounding technology,the input and output terminal of the signal with additional filter,input power of the controller using low-pass filter technology etc.On the side of the software,it primarily has NOP instruction,set up self-check procedure,WATCHDOG,software trap and instruction redundancy technology and so on.Thus it improved the system anti-interference ability of the intelligent power detector greatly,which has certain practical reference value of enhancing the system anti-interference performance.