文档介绍：对优化城市配电网基本结构的探讨袁北勇(江苏省电力公司无锡供电公司,江苏无锡 214171 ) A solution to optimize the structure of Urban electronic work Yuan Beiyong (Wuxi pany of Jiangsu Province , Jiangsu Wuxi 214171 ) Abstract :Through analysis of the the 10KV Urban electronic work’s status and situation .we can find that the potential of work has reached the limit due to the limitations of the network structure,. To further improve work’s power supply capacity, the functional and technical specifications, the need to improve the basic structure of the work. So, the idea of the urban electronic work with the basic unit of the thin -B-shaped is raised up, work consists of closely tied to the" grid ". In the thin-B shaped basic unit , on-off site and distri bution site access different edge lines , each user ha s a dual power supply. After analysis of the technical for the basic work, when the power supply is same, the line loss decreased by 80%, the voltage loss decreased by 73%, short circuit capacity increases, but within the permissible range. It is suggested that the basic unit of the thin-B-work has obvious advantages and feasibility. Keywords : Electronic work optimize structure solution 摘要:通过归纳、分析目前 10kV 城市配电网的结线和运行现状,看到由于受网络结构的限制,现网络的潜力已接近极限。要进一步提高配网的受、供电能力、各项功能和技术指标,需改进配电网的基本结构。为此,提出了城市配网“扁日形”基本单元的构思,使‘网’由紧密连结的‘格’组成。在“扁日形”基本单元网中,开闭所、配电所接单元网不同的边线,各用户都有双电源。对基本单元网各项技术性能定量分析后得,供电相同负荷时,线路损耗下降 80% 、电压损耗下降 73% 、短路容量增大,但在容许范围内。由此表明“扁日形”基本单元网具有明显的优越性和可行性。关键词:配网;优化;结构;探讨 0 引言 城市配电网是供、用电之间的枢纽。它的功能表现为,受、供电能力和电能质量, 优质与否直接影响着城市的经济建设与发展,随着高新技术、高科技产品迅速增加, 城市用电结构和要求发生了巨大的变化。对电能质量的要求也快速提高,具备充足的供电能力、不间断供电、高质量电能、稳定的电压等已属基本要求。为此需要优化配电网结构、吸收发达国家城市配网的先进技术,结合本地区实际情况,规划出受、供电能力强、功能齐全、供电可靠性高、电能质量达标的有发展余度的新型配电网架。并有计划地分步实施,满足经济建设的需要,使城市配电网成为经济发展的福星。 1 城市配电网的接线现状 放射型也称树干型 (图1)、放射型图1 放射型接线方式图 1为放射型接线方式。这种接线方式适用于非重要用户和非市中心供电。干线一般分为 2-3 段,支线较长的装分支开关,缩小事故和检修停电范围。目前主要用于我市负荷轻、分散的市郊和农村。线路较长,供电半径 3-6 km 。干线一般使用 LGJ-120 ,逐段减小。电压降较大、电能质量不易保证、供电可靠性低。常因检修、施工和事故抢修使整条线路停电。但接线简单成本低,调度操作简单。 手拉手型 (图2)手