城市配电网合环分析系统的研究

发布时间：2018-03-04 17:22

本文选题：城市配电网　切入点：合环操作　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：城市配电网合环操作是提高供电质量和供电可靠性的有效方法,对配网智能化发展有着重要的意义。但由于合环操作过程中存在暂时改变电网运行结构、产生合环电流等问题,直接影响着电网的安全运行。因此需要对合环操作过程进行研究,开发一套辅助调度运行人员操作的合环操作分析系统,提高调度运行人员合环操作的安全性和可靠性,避免经验型操作,提高配电网合环操作的智能化发展。首先,本文综合考虑城市配电网与输电网密不可分的实际情况,利用了较为成熟的BX方案型快速分解算法,考虑了馈线下负荷分布的几种不同情况,给出了四种负荷等效模型,并根据所建立的合环电流计算模型给出了程序流程。其次,分析了合环对线路继电保护及线路设备的影响,包括合环电流对零序过流保护、暂稳态电流对电流保护及合环对线路设备的影响分析,总结出配网合环安全校核内容,为合环系统的决策判断提供依据。最后,利用Microsoft Visual Studio 2010开发出基于Windows操作系统的图形化界面分析系统,按照系统设计思想和总体设计要求,对系统架构、接口及安全防护等进行了设计,重点对系统的元件物理拓扑设计、可视化图形模块及合环操作计算分析模块的界面及功能进行了详细设计与实现。并利用所开发的系统搭建出兰州电网,选取其中的一个合环点进行了计算分析,给出了合环调节控制措施,对配电网合环操作具有一定的指导意义。
[Abstract]:The closed loop operation of urban distribution network is an effective method to improve the quality and reliability of power supply, which is of great significance to the intelligent development of distribution network. Therefore, it is necessary to study the operation process of involute ring and develop a closed loop operation analysis system to improve the safety and reliability of closed loop operation. To avoid empirical operation and improve the intelligent development of distribution network closed loop operation. Firstly, considering the fact that urban distribution network and transmission network are inseparable, this paper makes use of the more mature BX scheme fast decomposition algorithm. Considering several different conditions of load distribution under the feeder line, four equivalent load models are given, and the program flow is given according to the established closed loop current calculation model. Secondly, the influence of the closed loop on the line relay protection and line equipment is analyzed. It includes the analysis of the effect of current current on zero-sequence overcurrent protection, transient current on current protection and the effect of loop closure on line equipment, and summarizes the contents of safety check of distribution network closing ring, which provides the basis for decision judgment of closed loop system. A graphical interface analysis system based on Windows operating system is developed by using Microsoft Visual Studio 2010. According to the system design idea and overall design requirements, the system architecture, interface and security protection are designed. The interface and function of the physical topology design, visual graphics module and closed loop operation analysis module of the system are designed and realized in detail, and the Lanzhou power grid is built by the developed system. One of the closed loop points is selected for calculation and analysis, and the regulation and control measures are given, which have certain guiding significance for the operation of the closed loop in the distribution network.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM727.2

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