配电网线损分析

范文编号:ZD298  范文字数:20108,页数:38

摘要

 线损是供电企业重要的经济技术指标，是企业管理的关键环节，线损的高低及线损的管理不仅直接影响企业的经济效益，而且在一定程度上说明了企业的管理水平。在电力企业的线损管理中，配电网的线损管理历来是线损管理的重点和关键。有效地降低配电网的电能损耗，是线损管理工作长期追求的目标，也是大中型城市供电企业线损管理的重点。
 本文通过对配电网线损的各种影响因素进行系统的分析，侧重从理论方面进行分析加以必要的计算推导，主要研究三相负荷不平衡配电网线损的影响，并有针对性的给出改进措施，为供电企业的配电网线损管理提供科学依据。
 
 关键词：配电网；三相负荷不平衡；相不平衡度；负荷电流的不平衡度；降损措施

Abstract

 The line damages is the power supply enterprise important onotechnical norms, the management not only immediate influence enterprise's economic efficiency which is the business management key link, the line damages the height which and the line damages, moreover explained enterprise's management level to a certain extent. In the electric power enterprise's line damages in the management, distribution network's line damages the management is always the line damages the management the key point and essential. Reduces distribution network's electrical energy loss effectively, is the line damage technical makes the long-term pursue the goal, is also the large and middle scale urban power supply enterprise line damages the management the key point. This article through each kind of influencing factor which damages to the power distribution mesh wire carries on system's analysis, stresses carries on the analysis essential computation inferential reasoning from the theoretical side, the main research three-phase load not balanced power distribution mesh wire damages the influence, and target-oriented gives the corrective measure, damages the management for the power supply enterprise's power distribution mesh wire to provide the scientific basis.
 
 Key word: Distribution network; The three-phase load is not balanced; Unbalancedness; Load current unbalancedness; Falls damages the measure

目     录

第一章  引言 1
1.1  研究的目的和意义 1
1.2  研究现状 1
1.3  本文的研究内容 3
第二章  配电网线损分析的基本理论和计算方法 4
2.1  配电网线损分析的基本理论 4
2.2  配电网线损计算的主要方法 9
第三章  三相负荷不平衡对配电网线损的影响 13
3.1  三相负荷不平衡的基本类型 13
3.2  三相负荷不平衡对线路损耗的影响 13
3.3  线损与相不平衡度的关系 14
3.4  线损增加率与负荷电流不平衡度的关系 16
3.5  配电网中几种负荷不平衡特例的线损分析 18
3.6  实例 23
3.7  调整三相不平衡负荷的重要意义 24
第四章  配电网降损措施分析 26
4.1  降低配电网线损的技术措施 26
4.2  降低配电网线损的管理措施 30
结论 33
参考文献 34  

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