由于禅城区为佛山政治文化中心，城区客户对供电可靠性的要求越来越高，短暂的 停电已不能满足客户的高要求，不停电转供电将成为禅城城区转供电的一个主要趋势， 对佛山城区供电可靠性的提高具有重要意义。 目前国内配电网包括佛山供电局架空线较密集的地区已经有合环转供电的做法，且 技术发展较为成熟，但该技术主要应用在架空线中，采用的是一次核相技术，而管辖佛 山禅城城区的城区供电所 10kV 电缆率高达 95%，无法采用一次核相进行带电合环工作， 研究二次核相技术成为解决城区所带电合环推广工作的关键，本文通过对佛山禅城供电 局城区供电所带电合环试行工作数据进行整理及分析，分析了佛山禅城配电网络的接线 特点，结合佛山禅城城区电缆率高达 95%、环网率 100%及手拉手型配电网特点，进行 如下研究方向，1.提出了手拉手合环转供电操作的相关规定和要求，建立了合环稳态电 流和冲击电流的模型，分析了影响合环电流的因素，提出了降低合环电流的有效方法； 2.介绍试点阶段在 10kV 电缆线路成功实施的带电合环方法，总结了手拉手配电网的带 电合环运行条件、核相方式、带电合环步骤；3.提出改进带电合环条件的可行性方案， 通过对试行阶段成功的带电合环和供电可靠性数据进行分析研究，得出不满足带电合环 情况的几大因素，除了传统的一次核相及二次核相方法，在工作中衍生出母联柜、备用 柜及解环点的二次核相方法，对不满足带电合环的因素进行改进及配网方式优化调整等 措施，对几大方案进行可行性研究及分析；4.研究当前技术能否应用于未来配电网典型 接线架构，总结了满足佛山城区带电合环的可行条件，进一步探讨对于佛山配电网未来 规划的“N-1”接线模式，提出了满足未来接线方式下的带电合环的条件及要求，对 10kV 配电网合环操作提供实际的理论依据和指导意义。 关键词，潮流计算；二次核相；手拉手配电网；带电合环II Abstract As Chancheng district is the political and cultural center of Foshan, customers are increasingly high demand for power supply reliability, Short no power failure can not meet the high requirements of customers, Power supply will become a major trend in Chancheng city to power supply, The improvement of power supply reliability in Foshan city is of great significance. The current domestic distribution network, including the Foshan Power Supply Bureau of the overhead line of the more intensive areas have a close loop power supply，And the development of technology is more mature，But the technology is mainly used in the overhead line. The use of a nuclear technology，And the city of Chancheng Foshan city district power supply 10kV cable rate of 95%，Can not adopt a nuclear phase to carry out the work of charged ring，The study of the two nuclear phase technology is the key to the promotion of the work in the city. In this paper, the working data of the Chancheng Foshan Power Supply Bureau in the city are analyzed and sorted out by the data of the Power Supply Bureau，The characteristics of distribution network in Chancheng Foshan are summarized，The cable rate of Chancheng city in Foshan city is 95%, the ring network rate is 100% and the characteristics of the hand in hand type distribution network，For the following research directions，1、The relevant regulations and requirements for the operation of the power supply operation of the hand in hand are put forward. A model of the steady state current and impact current of the composite ring is established.2、 The factors affecting the current of the ring are analyzed. An effective method to reduce the loop current is proposed. Methods for the successful implementation of the pilot phase in the 10kV cable line，Methods for the successful implementation of the pilot phase in the 10kV cable line。3、The feasibility scheme of improving the condition of charged ring is proposed. Analysis and Research on the success of the charging and power supply reliability data of the pilot phase，Several factors that can not satisfy the condition of charged ring，In addition to the conventional nuclear phase and the two nuclear phase method，The two nuclear phase method of generating the parent stock, standby cabinet and the solution of the ring in the work，The factors that do not meet Charge transfer load are improved and the distribution of the distribution network is optimized. Feasibility study and analysis of several major schemes，Research on the application of the current technology to the future distribution network architecture，The feasible conditions ofIII meeting Charge transfer load in Foshan city are summarized. Further discussion on the N-1 connection mode for the future planning of Foshan distribution network，The conditions and requirements of Charge transfer load in the future are presented，The theory basis and the instruction significance for the 10kV distribution network operation。 Key word，Power flow calculation；Two nuclear phase；Hand in hand distribution network； Charge transfer load, Charge transfer loadIV 目 录 摘要...........................................................................................................................................I ABSTRACT .............................................................................................................................. II 第一章 引言..............................................................................................................................1 第二章 带电合环潮流理论分析..............................................................................................4 2.1 计算原则............................................................................................................................................. 4 2.2 计算稳态电流 ................................................................................................................................... 4 2.3 计算冲击电流 ................................................................................................................................... 6 第三章 核相及带电合环..........................................................................................................8 3.1 相关要求及技术标准 ..................................................................................................................... 8 3.2 核相方法............................................................................................................................................. 8 3.2.1 二次核相方法 ....................................................................................................................... 9 3.2.2 一次核相方法 ..................................................................................................................... 12 3.2.3 核相常见的几种错误方法 .............................................................................................. 12 3.3 带电合环操作 ................................................................................................................................. 13 3.4 带电合环案例 ................................................................................................................................. 14 3.4.1 联络电缆（联络柜）的经典带电合环 ..................................................................... 14 3.4.2 以备用柜为基准的带电合环 ........................................................................................ 16 3.4.3 母联柜的带电合环............................................................................................................ 18 3.4.4 恢复原运行方式的带电合环 ........................................................................................ 20 第四章 改善带电合环运行条件的方法及措施....................................................................23 4.1 实际运行中带电合环不成功分析 ........................................................................................... 23 4.2 提高带电合环成功率的改进方案 ........................................................................................... 25 4.2.1 针对核相不成功的原因提出改进方案....................................................................... 25 4.2.2 评估方案的优缺点............................................................................................................ 26 4.2.3 技术改进成效 .............................................................................