二次设备集中安防运维及主动感知和诊断预警关键技术的研究

  目的  针对当前电力监控系统安防要求持续更新的难题和安防整改现场作业效率低下、效果不可控的问题，以及部分二次设备无有效整改方案而大面积脱网运行的现状，研究了二次设备集中安防运维及主动感知和诊断预警关键技术。  方法  变电站内统一部署合规并网装置，利用基于深度信念网络的多类支持向量机入侵检测和基于自适应概率标记的IP反向追踪技术筛选录波数据、主动感知和追溯诊断入侵威胁，采用基于威胁和对抗分析相结合的风险预警和综合评估技术进行影响评估和等级评定，利用现有的录波主站系统拓展安防运维管理业务，形成集中运维管理的模式。  结果  实践结果表明，该方法可实现变电站二次设备安防体系集中管理和运维效率大幅提升的目标。  结论  结合广西电网运行案例，证明了该方法在解决二次设备现场安防整改问题中的有效性和可行性。

Research on Secondary Equipment Centralized Security Operation and Maintenance and Key Technologies of Active Perception,Diagnosis and Early Warning

  Introduction  Aiming at the current problems of the continuous update of the security requirements and low efficiency and uncontrollable effects of security rectification on-site operations for the power monitoring system, and the status quo of large area off-grid operation of some secondary equipment without effective rectification methods, secondary equipment centralized security operation and maintenance and key technologies of active perception, diagnosis and early warning are studied.  Method  Compliant grid-connected devices were unified deployed in substations, the technologies of deep belief nets multi-class support vector machine intrusion detection and adaptive probabilistic marking scheme IP traceback were used to filter recording data, active percept and retrospective diagnosis invaded threats, the risk early warning and comprehensive assessment technology based on combining with threat and adversarial analysis were adopted to carry out impact assessment and rating, and the existing recording master station system was used to expand the security operation and maintenance management business to form centralized operation and maintenance management model.  Result  Practical results show that this method can achieve the goals that the security system of substation secondary equipment is centralized managed and efficiency of operation and maintenance is higher.  Conclusion  The proposed method is effective and feasible to solve the problem of on-site security rectification of secondary equipment combined with the Guangxi power grid operation case.