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| 摘要: |
| 归纳了微机保护装置常见的干扰源，主要有供电系统、静电感应、电磁感应及信号通道等干扰，分析了干扰对装置正常工作的影响。从硬件和软件两方面总结了抗干扰措施：硬件方面主要有电源滤波、屏蔽、隔离、接地等技术；软件方面主要有WATCHDOG、空指令、数字滤波及软件陷阱等技术。并针对微机保护装置开入／开出信号给出了抗干扰措施。对提高微机保护装置的抗干扰性能有一定的实用参考价值。 |
| 关键词: 电磁干扰 硬件抗干扰 软件抗干扰 |
| DOI： |
| 分类号:TM774 TM769 |
| 基金项目: |
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| Anti-interference measures in microprocessor-based protective equipment of power system |
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ZHANG Sheng-wang LIN Feng
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| Abstract: |
| The common interference sources of microprocessor-based protective equipment are sum-marized,including power supply interference,electrostatic and electromagnetic induction interference,signal channel interference,and so on. Their influences on the operation of protective equipment are analyzed. The anti-interference measures are summarized from hardware and software. Techniques,such as source filtering,shielding,isolating and grounding,are available in hardware,while WATCH-DOG,false instruction,digital filtering and trap are available in software. Some anti-interference measures are suggested for the binary input and output signals. The paper provides some referen-ces to improve the anti-interference capability of microprocessor-based protective equipment. |
| Key words: electromagnetic interference,hardware anti-interference,software anti-interference |
