【作者】 高会生；

【导师】 苑津莎；

【作者基本信息】 华北电力大学（河北） ， 电工理论与新技术， 2009， 博士

【摘要】 电力通信网是服务于电力系统的通信专网,它的通信业务具有高级别的实时性、可靠性和安全性需求,电力通信网的可靠性是影响电力系统安全、稳定运行的重要因素之一,是评价电网性能和管理水平的重要方面,也是制定电力通信网发展规划的重要参考依据。与公用通信网相比,电力通信专网的可靠性研究相对滞后。论文在全面分析电力通信业务可靠性需求的基础上,针对如何建立客观、准确的可靠性模型,提出符合电力通信网运行管理特点的可靠性综合评价方法开展研究。论文分析了电力通信网的构成形式和业务类型,明确了各类业务的可靠性需求。通过比较可靠性、有效性、生存性和安全性四种概念,选择有效性作为可靠性测度,研究电力通信网的综合可靠性问题。在考虑通信设备内部结构和电源系统构成的基础上,给出了专用、复用和主备用光纤电路的有效性模型,该模型较完善地体现了通信设备内部各模块之间的逻辑关系,同时考虑了供电电源系统对通信电路有效性的影响,使得分析结果更加符合实际。针对通信设施基本有效性参数的分散性问题,提出了一种通信设备和光纤设施的模糊有效性模型,并由此导出通信电路的模糊有效性模型,给出了模糊有效性分析方法,有效地解决了参数的不确定性问题。针对通信网业务有效性分析问题,对电力通信网业务进行了重要度评估,提出了一种基于业务重要度的网络有效性模型,并给出了相应的有效性分析算法,该方法考虑了共享网络单元对业务有效性的影响,分析了不同业务量阈值条件下,网络业务有效性的变化趋势。基于风险理论对共享网络单元的业务重要性进行了评估,评估结果能够反映网络脆弱性的分布情况。论文结合电力通信网管理的特点,对电力通信网管理方式、运行环境及影响可靠性的因素进行了分析,参考标准的端到端通信安全体系结构和电力通信安全性行业评价办法,确定了可靠性分层,建立了电力通信网可靠性综合评价指标体系。为了减少指标权重的主观性,提高评价结果的客观性和可信性,提出了一种基于改进模糊层次法的综合可靠性评价方法,该方法基于对数最小二乘法(LLSM)进行模糊权重计算,利用限位系数法来实现评价结果的解模糊过程,解决了电力通信网可靠性评价中不确定性问题,实例评估验证了该方法的有效性和可行性。更多还原

【Abstract】 Power communication network is a private communication network for power system. It has high requirements of real-time, reliability, and security in services. The reliability of power communication network is one of the most important factors influencing security and stability of power system. It takes an important role in performance evaluation and management assessment of the power systems. In power communication network planning, reliability is a key constraint. Compared to public communication network, reliability research of power communication network lags behind relatively. On the basis of the analysis for power communication network reliability requirements, establishing an objective and accurate reliability model, proposing comprehensive evaluation method corresponding to the characteristic of power communication network reliability, are main research topics.The structure and services types of power communication network are analyzed, the requirement of each services are clarified. By comparing the concepts of reliability, availability, survivability and security, the concept of availability is used as reliability measure to research the comprehensive reliability of power communication network.The internal structure of the equipments and the power supply systems are taken into account, and then availability models of dedicated, multiplexing and active-standby optical channels are constructed. These models can reflect the logic relation of internal components in communication equipments states and the influence of power supply system on circuit availability is considered. The analytic results are in conformity with the needs of reality. In view of the dispersion of availability parameters for communication infrastructures, the triangle fuzzy number method based fuzzy availability models of communication circuits and its analysis method are proposed. This method has solved the uncertainty problem of parameters effectively.Aiming at the question of availability analysis of power communication network services, the importance of power communication services is evaluated. The service availability model based on service importance and its analytic algorithm are proposed. The algorithm considers the influence of shared network elements on services availability. The variation trend of network services availability at different services traffic threshold is analyzed. The risk theory based importance assessment of shared network elements is provided. Evaluation results show the distribution of network’s vulnerabilities.Combining the characteristic of power communication network management and operation environment of power communication network, the influence factors for reliability are analyzed. Consulting the standard end-to-end communication security system architecture and evaluation mechanism in the industry of electric power communication, security layering is defined and the reliability comprehensive evaluation indicator system is established. To reduce the subjectivity of indicator weight, improve the objectivity and credibility of evaluation results, a comprehensive evaluation method of reliability based on improved Fuzzy-AHP is proposed. The fuzzy weights are calculated on the basis of LLSM. The restricted coefficient method is used to de-fuzzy the evaluation results. The uncertainty of reliability assessment in power communication network is solved; the effectiveness and feasibility are verified by evaluation examples.更多还原