浅谈油气管道SCADA系统网络安全建设

Discussion on SCADA System Cyber Security Construction of Oil and Gas Pipeline

油气管道的SCADA系统网络安全关系到国家的战略安全,网络安全建设是根据相应的安全保护等级,通过安全防护技术体系和安全管理体系两部分进行的。安全保护等级的确定应根据相关标准,结合定级要素与安全保护等级的关系,按照定级流程,通过对定级要素分析,综合业务信息安全等级和系统服务安全等级,确定出网络安全保护等级。防护技术体系建设需要结合五个层面存在的安全问题和可能的风险,从SCADA系统的重要程度入手,确定安全保护需求,提出针对性安全技术措施,形成系统安全技术体系结构。安全管理体系是防护技术体系的支撑,两者相互关联,相辅相成。

Emergency shutdown (ESD) system is an important subsystem of safety instrumented system, and ESD button is the most common manual trigger device in ESD system, which is used to trigger the protection program of ESD system artificially to alleviate the expansion of hazard and reduce the loss when accidents or dangers occur. In order to standardize the configuration of ESD button and reduce the error trigger rate, the corresponding loop detection function should be added to the ESD button circuit to ensure no error trigger. The diagnosis resistance in the detection circuit is recommended by the manufacturer, and the diagnosis current needs to be configured according to the actual situation of the ESD cabinet.