【作者】 赵冬梅；

【导师】 高曙；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2005， 博士

【摘要】 电网故障诊断是进行事故处理的前提。研究电网故障诊断方法,是为了将需要调度员和其它单位协同完成的电网故障判断任务交给计算机来辅助完成,利用计算机的快速计算能力,在设备故障后快速准确地给出分析结果,以便辅助调度员故障后做出合理的运行决策。因此,提高电网故障诊断的准确性对电网的安全运行具有重要的意义。电网故障诊断是建立在相应的电网自动化水平基础之上,过去的故障诊断系统获取信息的来源仅建立在SCADA系统上,因此国内、外开发的智能诊断系统大都是基于开关和保护两种信息进行诊断。目前,变电站的微机监控、综合自动化技术得到普遍应用,特别是近几年来,故障信息系统的推出,各网(省)调已相继完成以实现全网故障录波数据远传为主要目标的联网工作,电力系统自动化技术取得了飞速的发展,这也必将为故障诊断系统提供更多的故障信息来源。结合以上实际,本文主要完成了以下工作: 1 提出了一种逐层调用开关、保护和电气量波形信息的分层故障诊断策略,结合目前电网的自动化技术和未来发展方向的实际,完全模拟现场工作人员的实际分析过程,从提高实时性和灵活利用信息的角度达到在简单和复杂故障情况下对信息资源的合理利用。 结合微机保护和故障录波器联网系统联网方式的特点,提出了两种适宜的基于故障录波信息诊断的实现方案,分别为基于分站的方案和基于中心站的方案,并对两种方案进行了分析和比较。 2、根据电网故障诊断的特殊要求,在EMS公用数据基础上,混合利用多种技术表示故障诊断知识。采用面向对象技术和动态拓扑分析方法,描述用于电网故障诊断的拓扑知识;采用产生式表示法,描述故障诊断规则;基于继电保护配置和运行规程,设计保护属性知识库;力求整个电网故障诊断的知识表示体系合理完整,可以很好地满足故障诊断系统的要求。 3、提出了基于SCADA信息源和故障信息系统信息源不同特点的两种诊断推理策略,并结合兰州电网调度决策系统的项目对地区电网故障诊断系统在电网运行中的实用化进行了探索。以便尽可能地利用现阶段可以利用的故障信息源。通过分析故障设备、保护动作和开关动作之间的因-果联系,实现了诊断故障设备、评价开关和保护的动作行为等任务,完整分析和解释故障过程;在现阶段的电网运行水平下,给出调度员有实际意义的故障诊断结果。通过对保护、自动化系统动作的正确性分析,提高诊断的准确性。扩展了诊断的范畴。更多还原

【Abstract】 Power grid fault diagnosis is the prerequisite of the fault resolution. The aim of researching on the ways of grid fault diagnosis is to judge the fault by computer instead of dispatcher and other units, using computer rapid calculation ability, provides the analysis result accurately fast, so that assist dispatcher make rational operation decision after fault occur. Therefore, promoting the accuracy of grid fault diagnosis is very important for grid running.The degree of grid automation is the foundation of power grid fault diagnosis. The information resource of formally fault diagnosis system was established on SCADA system, so domestic and abroad fault diagnosis systems mostly diagnosis grid fault according to the information come from break and protection. Now, computer monitor and automatic technology of electric station is very popular. Especially, after fault information system appeared in recent years, many province center finish the unit whose aim is long distance transfer of whole grid fault data, electric system automatic technology get great progress, those can provide more fault information resource for fault diagnosis system. According to those practical situation. This thesis finishes works as follows:1.Combining the fact of present grid automatic technology and its development ride, this thesis poses layered diagnosis tactics which use information of protection 、 break and wave record of electric equipment by layer , it can imitate the analysis process of field worker so as to properly utilize the resource at the point of improving Real-time character and flexibility on information uses.According the character of this thesis put forward two means of, one is base substation, another is base control center, and comparing the two means.2. On the basis public data of EMS, mix and utilize many kinds of technology to show that diagnose knowledge in fault diagnose, Adopt face target’s technology and topological analytical method of trends, describe topological knowledge which used in fault diagnose; adopt the production knowledge representation describe that diagnoses the rule in fault; according to protection disposition and operation rules; it striving hard to denote perfectly and更多还原