电能计量基本知识介绍

整理文档很辛苦,赏杯茶钱您下走!

免费阅读已结束,点击下载阅读编辑剩下 ...

阅读已结束,您可以下载文档离线阅读编辑

资源描述

1电能计量基本知识介绍1概述2电力系统的组成3三相交流电4电网质量5电压、电流互感器6电能表的基本概念7电能表的检定8常用电能计量标准id14930278pdfMachinebyBroadgunSoftware-agreatPDFwriter!-agreatPDFcreator!-!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA2电能计量基本知识介绍1,概述•可测量,但不可见•必须连续即时提供所需的电量•无法实现一手交钱一手交货•应用领域特别广泛pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA3电能计量基本知识介绍1,概述pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA4电能计量基本知识介绍1,概述pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA5电能计量基本知识介绍1,概述pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA6电能计量基本知识介绍1,概述pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA7电能计量基本知识介绍1,概述pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA8电能计量基本知识介绍2,电力系统的组成•发电:发电机(6.3/10.5KV),升压变压器(高压)•输电:架空高压线路•变电:变电所(站),降压变压器•配电:配电所•用电:工商业和农业、民用用户pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA9电能计量基本知识介绍2,电力系统的组成-电压等级高压35KV以上中压35/10KV低压220/380VpdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA10居民用户计量中型工商业用户计量关口计量大型工商业用户计量小型工商业用户计量Ⅰ类(0.2s/0.5s):200MW以上发电机/发电上网电量计量/电网间电量交换计量/省级电网至供电企业的关口计量;Ⅱ类(0.5s/0.5):100MW以上发电机/供电企业间电量交换计量;Ⅰ类(0.2s/0.5s):月用电量500万KWh以上/10000kVA及以上的高压计量用户;Ⅱ类(0.5s/0.5):月用电量100万KWh以上/2000kVA及以上的高压计量用户;Ⅲ类(1.0):月用电量10万KWh以上/315kVA及以上的计量用户Ⅳ类(2.0):负荷容量为315kVA以下的计量用户根据DL/T448-2000属于Ⅰ,Ⅱ,Ⅲ类计量用户根据DL/T448-2000属于Ⅳ类计量用户根据DL/T448-2000属于Ⅴ类计量用户电能计量基本知识介绍2,电力系统的组成-用户容量等级pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA11电能计量基本知识介绍2,电力系统的组成-电力网络pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA12电能计量基本知识介绍3,三相交流电•正弦交流电-大小和方向按照正弦曲线规律变化的交流电•正弦交流电的基本物理量1.瞬时值、最大值和有效值2.周期、频率和角速度3.相位、初相位和相位差4.我国交流电的频率为50Hz,周期为0.02s,角速度314rad/spdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA13电能计量基本知识介绍3,三相交流电•交流电的表示方法1.解析式:u=Umsin(ùt+ô)2.波形图-描绘交流电大小和方向随时间变化的曲线3.旋转相量-长度与正弦量的大小成比例的相量(带箭头的线段)4.相量图-几个同频率的交流电画在同一坐标中的图形pdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA14电能计量基本知识介绍3,三相交流电•纯电阻电路-含有白炽等、电炉、电烙铁、变阻器等负载的电路1.电压和电流同频率、同相位,电压和电流的值服从欧姆定律2.电阻消耗的功率在任一瞬时都是正值,即任一时刻都向电源吸取电能•平均功率-一周期内瞬时功率的平均值,又称有功功率,用P表示,单位W,等于电压和电流有效值的乘绩,P=U*IpdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA15电能计量基本知识介绍3,三相交流电•纯电感电路-仅有理想电感组成的电路1.电压和电流同频率时、电压超前电流相位90°2.电感电路中一周内的平均功率为0,电路不消耗有功功率3.无功功率-一周期内瞬时功率的最大值•无功功率-一周期内瞬时功率的最大值,用QL表示,单位var或kvarpdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA16电能计量基本知识介绍3,三相交流电•纯电容电路-仅有理想电容组成的电路1.电压和电流同频率时、电流超前电压相位90°2.电容电路中一周内的平均功率为0,电路不消耗有功功率3.无功功率-一周期内瞬时功率的最大值•无功功率-一周期内瞬时功率的最大值,用Qc表示,单位var或kvarpdfMachine-isapdfwriterthatproducesqualityPDFfileswithease!Getyoursnow!“Thankyouverymuch!IcanuseAcrobatDistillerortheAcrobatPDFWriterbutIconsideryourproductaloteasiertouseandmuchpreferabletoAdobe'sA.Sarras-USA17电能计量基本知识介绍3,三相交流电•纯电容电路工作过程分析pdfMachine-isapdfwriterthatproducesqualityPD

1 / 57
下载文档,编辑使用

©2015-2020 m.777doc.com 三七文档.

备案号:鲁ICP备2024069028号-1 客服联系 QQ:2149211541

×
保存成功