导　　师： 常鲜戎;李江帆

学科专业： 080802

授予学位： 硕士

作　　者： ;

机构地区： 华北电力大学

摘　　要： 线损理论计算是降损节能,加强线损管理的一项重要的技术管理手段。通过理论计算可发现电能损失在电网中分布规律,通过计算分析能够暴露出管理和技术上的问题,对降损工作提供理论和技术依据,能够使降损工作抓住重点,提高节能降损的效益,使线损管理更加科学。所以在电网的建设改造过程以及正常管理中要经常进行线损理论计算。本文论述了配电网理论线损的计算方法,并对各种计算方法进行优缺点分析和比较,结合萝岗地区10kV配电网的实际情况,筛选出了最适合该配电网的理论线损计算方法——配网等值电阻法。详细论述了该方法的基本原理和计算过程。结合萝岗地区10kV配电网的结构,分别推导出了全网配电变压器的等值电阻和全网配线的等值电阻。另外针对小电源/(小水电、小火电、风电/)等近期新能源发电技术的存在对配电网电能损耗的计算所造成的困难,推导出了等效的等值电阻。对配电网中的少数供电安全性要求较高的环网配电网结构或两端供电系统,做出了解网的方法说明,即选取“功率分点”把环网分解成辐射状的网络形式进行线损计算。选取线损理论计算代表日,取当日24整点负荷实测数据,结合预先收集的10kV配网中设备参数和特性数据等电网结构参数,进行了算例验证。计算结果和实际的测量线损进行比较,得出各种损耗所占的比例,对计算结果进行比较分析,找出了降损的主要矛盾,提出了降损建议及相应的措施。 Line loss theoretical calculation is a kind of important technical management tool for reduction energy saving, strengthen the line loss.Through theoretical calculation power loss can be found in power grid distribution rule through calculation and analysis to expose the management and technical problems, to reduce loss to provide theoretical and technical basis work, can make a loss reduction work focusing, improve energy loss reduction of benefit, make the line loss management more scientific.So in the grid construction and reform process and normal management should be regular line loss theoretical calculation. This paper discusses the theoretical calculation method of power line loss, analysis and the advantages and disadvantages of various methods for calculating analysis and comparison, combining with he actual situation of 10kV power system of LuoGang area, the most suitable method of the distribution network equivalent resistance method for the distribution theory loss calculation method is performed.This paper discussed the basic principle and method of calculating process.Combining with the 10kV power structure of LuoGang area, respectively hyper distribution transformer equivalent resistance and the entire network wiring equivalent resistance is carried out. Besides aiming to the difficult of distribution power loss calculation made by generating new energy technology such as small hydropower, small-scale, wind power, the equivalent resistance is performed.A few of the power supply for distribution network security demand higher ring network distribution network structure or ends power supply system, make understand nets instructions, namely select the "power point" ring net is decomposed into radial of kind of network loss calculationSelect line loss theoretical calculation on tipical day, take representative 24 strikes, combined with the measured data load distribution network consumers 10kV collected in advance equipment parameters and performance data of grid structure parameters as an example.Calculation results and actual measurement line loss comparison, it is concluded that the proportion of various losses, the calculated results comparison and analysis, found the main contradiction loss reduction, and puts forward Suggestions of loss reduction and the corresponding measures

关 键 词： 配电网 线损计算 数据处理 等值电阻法 降损措施

分 类 号： [TM744]

领　　域： [电气工程]