【作者】 张敏；

【导师】 孙凤杰；

【作者基本信息】 华北电力大学 ， 通信与信息系统， 2014， 硕士

【摘要】 电力通信网网管系统作为电力通信网主干电路可靠运行的支撑系统,其安全运行能够确保整个电力通信网网络的有效性与稳定性。本文通过对电力通信网网管系统在运行中存在的脆弱性及可能面临的威胁进行分析,完成了对该系统的风险值计算以及系统的可靠性评估。对电力通信网网管系统的实现功能和业务内容进行研究分析,总结得出了网管系统中存在的脆弱性和面临的风险。在研究电力通信网网管系统层次结构和业务内容的基础上,提出了电网中网管系统的分层结构,并根据不同层次的结构特点确定了相应的评估模型。针对电力通信网网管系统结构特点,进行了层次划分,依据各层次所采用模型的特殊性,计算各模块的脆弱性和故障平均持续时间,得出该模型相应风险值的大小,并利用逐级求解的方式,计算求得整个电力通信网网管系统综合风险值。另外,以青海省电力通信网主干电路支撑系统安全风险评估项目为基础,确定了电力通信网网管系统评估指标、评估过程算法,以及评估结果的表现形式。最后,以Visual C++6.0作为算法开发工具,通过以软件的方式实现对电力通信网网管系统的安全风险评估。评估软件测试结果表明,提出的评估算法及其实现流程具有合理性与可行性。研究结果通过了青海省部级运行鉴定和测试考验,符合安全风险评估要求,并能够满足电力通信网网管系统功能需求。更多还原

【Abstract】 As the support system of power communication network, network management system (NMS)’s safe operation can ensure the effectiveness and stability of the all network. After analyzing the vulnerability and threat in the NMS, this paper realizes the calculation of risk value and the reliability evaluation of NMS.The vulnerability and threat in the NMS is presented based on the research of the exposing functionality and business content. The vulnerability and threat in the NMS is presented based on the research of the exposing functionality and business content. According to the characteristic of different hierarchy in NMS, layered structure of NMS is proposed and evaluation models are determined, which are on the basis of structure and business content. As for NMS in power communication network having its own character, the value-at-risk can be gotten by calculating the vulnerability value and the mean time between repairing (MTBR) of each module, which can be used to compute the comprehensive risk value of whole NMS. On the other hand, the determination of assessment indicators, evaluation algorithm and result expression are based on the trunk circuit supporting system safety risk assessment project of power communication network in Qinghai province. At last, Visual C++6.0are applied as the developing tools in the realizing of security risk assessment for NMS in power communication network.Test results of assessment software show that the evaluation algorithm and its fulfillment process are with rationality and feasibility. The research result has passed operational qualification test, showing that the assessment system can meet the demand of network management system更多还原