随着电子技术和计算机技术的飞速发展，计算机监控系统已在水电厂中推广应用，取得了较好的经济效益与社会效益．但由于自然界、周围环境及系统内部存在着各种干扰因素，严重地影响到计算机监控系统运行的稳定性和可靠性．因此，深入了解干扰的来源及其危害，并采取有效措施加以抑制是十分必要的，根据水电厂计算机监控系统的运行情况及特点，具体分析了产生干扰的来源，并重点探讨了为抑制干扰应采取的各种必要措施；尤其对供电系统、屏蔽和接地系统应采取的抗干扰措施作了较详细的论述，同时对软件的抗干扰措施亦作了具体介绍，实践证明这些抗干扰措施是行之有效的，对计算机监控系统的开发和运行部门具有参考价值，但由于抗干扰是一个很复杂的问题，有待在今后的实践中进一步积累经验和更深入的探讨。 With the rapid development of electronic technology and computer technology, computer monitoring system has been widely used in hydropower plants, and achieved good economic and social benefits. However, due to nature, the surrounding environment and the system there are all kinds of interference factors, seriously affecting the stability and reliability of the computer monitoring system operation. Therefore, in-depth understanding of the sources of interference and its hazards, and take effective measures to curb it is very necessary, according to the operation of hydropower plant computer monitoring system and characteristics of the specific sources of interference, and focused on the interference should be discussed In particular, the power supply system, shielding and grounding systems should take anti-jamming measures in more detail, at the same time the software anti-jamming measures also made a specific introduction, the practice proved that these anti-jamming measures are OK Effective, it has reference value to the development and operation department of computer monitoring system. However, as anti-interference is a very complex issue, we must further accumulate experience and discuss in more depth in the future practice.