DCS系统的抗干扰能力是攸关整个控制系统安全运行的关键因素之一,而接地系统是DCS安全和应用过程中的重要环节.针对某电厂DCS存在的网络噪声干扰问题,从系统接地类型、方式及接地装置等方面,对该电厂DCS接地系统进行了全面的研究和测试.分析了该电厂DCS系统内、外部干扰产生的原因,并提出了相应的解决和预防措施,由此确保了DCS系统的长期稳定运行.%The anti-interference capability of DCS is one of the key factors related to safety operation of the entire control system, while the grounding system is an important part of safety and application process of DCS. Aiming at the network noise interference issue of DCS in a certain power plant, comprehensive research and test are conducted for the grounding system of DCS in this power plant, including grounding type, grounding pattern and grounding facilities. The interference causes internal and external of the DCS are analyzed, and relevant countermeasures and protective methods are proposed, thus the long-term stable operation of DCS is guaranteed.
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