In order to ensure that the system can avoid or reduce internal and external electromagnetic interference in the power electromagnetic environment,three suppression measures must be taken from the design stage:suppress the interference source;cut off or attenuate the propagation path of electromagnetic interference;improve the anti-interference ability of the device and system.These three points are the basic principles of suppressing electromagnetic interference.The anti-interference of DCS control system is a systematic project,which requires the manufacturing unit to design and produce products with strong anti-interference ability,and depends on the user department to fully consider in the engineering design,installation and construction,operation and maintenance,and carry out according to the specific situation.Comprehensive design can ensure the electromagnetic compatibility and operational reliability of the system
为了保证系统在电力电磁环境中免受或减少内外电磁干扰，必须从设计阶段开始便采取三个方面抑制措施：抑制干扰源；切断或衰减电磁干扰的传播途径；提高装置和系统的抗干扰能力。这三点就是抑制电磁干扰的基本原则。DCS控制系统的抗干扰是一个系统工程，要求制造单位设计生产出具有较强抗干扰能力的产品，且有赖于使用部门在工程设计、安装施工和运行维护中予以全面考虑，并结合具体情况进行综合设计，才能保证系统的电磁兼容性和运行可靠性
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