智能变电站保护功能一体化配置研究

发布时间：2019-05-03 20:14

【摘要】：随着我国能源互联网的提出和智能电网的快速发展,仅利用本地信息和简单时间与灵敏性配合的传统保护模式逐渐显露出其固有的弊端,通过引入多信息来改善和提高传统保护的性能,已成为当前研究的热点。本文立足新一代智能变电站研究与设计的项目背景,从智能电网对继电保护的新要求出发,设计了集保护体系、具体原理、可靠性验证为一体的保护配置方案。本文在研究分析了现有智能变电站保护配置和解决方案的基础上,提出了解决智能站保护体系架构的三点意见,即明确智能站保护体系与传统保护设备和原理的协调关系,明确智能站保护体系与全网保护体系的架构,明确智能站保护体系下的保护功能实现。在以上意见的指导下,分别从保护的功能实现和保护的地理约束出发,建立了智能站保护保护功能一体化配置的两个体系,即由主保护、域保护和后备保护组成的三层保护功能体系;和由就地保护、站域保护和广域保护组成的三层保护机制体系。本文同时对两个体系的实现逻辑和内在机理进行了较为细致的描述,并对其具体功能的实现方式进行了开放性的阐述。提出了一种基于逻辑量的智能变电站站域保护实现方案,立足于上述体系,根据变电站现有保护冗余信息逻辑量,结合变电站继电器及断路器的动作状态,构建逻辑值与故障情况匹配函数,在变电站元件拓扑自动更新的基础上,快速定位单个或多重故障区域,并对匹配结果进行定性的可靠性检验。针对站内各一次设备或间隔可能出现的故障情况,设计了每个保护范围的判定方法和动作方案。当变电站范围内发生故障时,通过站域逻辑量的协调配合,可有选择地快速隔离故障。通过变电站故障案例分析结果表明证明该方案中提出的算法本身具有一定的容错性,且这个解决方案对传统保护按时间及灵敏度整定配合难的问题有了根本性的改善,有效提高了变电站站内一次设备的保护性能,配置灵活,高效可靠。为了证明上述体系和方案带来的优越性,本文从功能配置可用性出发,利用基于FMEA的可靠性分析方法,对智能站保护下的一体化配置体系进行了建模、分析和可靠性验证;结果表明,该保护体系具有更为合理的体系架构,较传统保护方案可靠性高。本文提出的智能变电站保护功能一体化配置方案在构建完整体系结构的基础上,提出了面向工程实际的技术方案和具体算法,并体系和算法分别进行了可靠性分析。所述体系的论证过程清楚,方案灵活性高,可靠性验证完整明确。目前,本方案所述保护原理部分已经在浙江供电公司相关站点试运行。
[Abstract]:With the introduction of energy Internet and the rapid development of smart grid, the traditional protection mode, which only uses local information and simple time and sensitivity, has gradually revealed its inherent drawbacks. The introduction of multi-information to improve and improve the performance of traditional protection has become the focus of current research. Based on the project background of the research and design of the new generation intelligent substation, this paper designs a protection configuration scheme which integrates the protection system, concrete principle and reliability verification from the new requirements of the smart grid for relay protection. Based on the research and analysis of the existing intelligent substation protection configuration and solutions, this paper puts forward three suggestions to solve the intelligent station protection architecture, that is, to clarify the coordination relationship between the intelligent station protection system and the traditional protection equipment and principle. The structure of the intelligent station protection system and the whole network protection system is defined, and the protection function is realized under the intelligent station protection system. Under the guidance of the above opinions, starting from the realization of the protection function and the geographical restriction of the protection, two systems of the integrated configuration of the protection function of the intelligent station, namely, the main protection, are established. Three-layer protection function system composed of domain protection and backup protection; And a three-layer protection mechanism system consisting of in-situ protection, station protection and wide-area protection. At the same time, the realization logic and internal mechanism of the two systems are described in detail, and the way of realizing the concrete functions of the two systems is described in detail. This paper presents an intelligent substation domain protection scheme based on logical quantity. Based on the above system, according to the existing protection redundancy information logic quantity of substation, combined with the operation state of substation relay and circuit breaker, this paper puts forward an intelligent substation protection scheme based on logical quantity. The matching function of logic value and fault condition is constructed. On the basis of automatic updating of substation component topology, the single or multiple fault areas are quickly located, and the matching results are tested qualitatively for reliability. In view of the possible failure of each equipment or interval in the station, the determination method and action scheme of each protection range are designed. When a fault occurs in the substation, the fault can be isolated selectively and quickly through the coordination of the logical quantity of the station domain. The results of substation fault case analysis show that the proposed algorithm itself has certain fault tolerance, and this solution has a fundamental improvement on the difficult coordination of traditional protection setting according to time and sensitivity. The protection performance of primary equipment in substation station is improved effectively, and the configuration is flexible, efficient and reliable. In order to prove the superiority of the above-mentioned system and scheme, this paper makes use of the reliability analysis method based on FMEA to model, analyze and verify the integrated configuration system under the protection of intelligent station based on the usability of function configuration. The results show that the protection system has a more reasonable architecture and is more reliable than the traditional protection scheme. On the basis of the integrated configuration scheme of intelligent substation protection function proposed in this paper, the engineering-oriented technical scheme and specific algorithm are proposed, and the reliability analysis of the system and algorithm is carried out respectively. The argumentation process of the system is clear, the scheme flexibility is high, and the reliability verification is complete and clear. At present, the protection principle of this scheme has been tested in Zhejiang Power supply Company.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM63;TM76

【参考文献】