(完整word版)2018高考物理变压器和远距离输电.pdf

上传人:Q****o 文档编号:55052285 上传时间:2022-10-29 格式:PDF 页数:7 大小:282.77KB
返回 下载 相关 举报
(完整word版)2018高考物理变压器和远距离输电.pdf_第1页
第1页 / 共7页
(完整word版)2018高考物理变压器和远距离输电.pdf_第2页
第2页 / 共7页
点击查看更多>>
资源描述

《(完整word版)2018高考物理变压器和远距离输电.pdf》由会员分享,可在线阅读,更多相关《(完整word版)2018高考物理变压器和远距离输电.pdf(7页珍藏版)》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。

1、10-2 变压器和远距离输电一、选择题1在变电站里,经常要用交流电表监测电网上的强电流。所用的器材叫电流互感器,如下图所示中,能正确反映其工作原理的是()答案 A 解析 电流互感器的工作目的是把大电流变为小电流,因此原线圈的匝数少、副线圈的匝数多,监测每相的电流必须将原线圈串联在火线中。2.如图,理想变压器原副线圈匝数之比为41,原线圈接入一电压为uU0sint 的交流电源,副线圈接一个R27.5的负载电阻。若U02202V,100 rad/s,则下述结论正确的是()A副线圈中电压表的读数为55V B副线圈中输出交流电的周期为1100s C原线圈中电流表的读数为0.5A D原线圈中的输入功率为

2、1102W 答案 AC 解析 副线圈中电压表读数为副线圈电压的有效值U2n2U02n155V,A 对。副线圈中精品资料-欢迎下载-欢迎下载 名师归纳-第 1 页,共 7 页 -交流电的周期等于原线圈中交流电源电压的周期T2150s,B 错。原线圈中的电流I1I2n2n1U2n2Rn10.5A,C 对。原线圈中的输入功率PU0I12110W,D 错。3(2012 大连四所重点中学联考)如图所示,M 为理想变压器,电表均可视为理想电表,电源电压 U 不变,输电线电阻忽略不计。当变阻器滑片P 向上移动时,读数发生变化的电表是()AA1BA2CV1DV2答案 AB 解析 本题考查变压器及电路动态分析。

3、由于电源电压U 不变,根据理想变压器工作原理可知两电压表示数不变,CD 错误;当变阻器滑片P 向上移动时,变阻器连入电路的电阻减小,右侧电路中电流增大,B 正确;根据P入P出可知原线圈中电流也增大,A 正确。4(2012 辽宁丹东四校摸底)如图所示,两种情况下变压器灯泡L2、L3的功率均为P,且 L1、L2、L3为相同的灯泡,匝数比为n1n2 3 1,则图甲中L1的功率和图乙中L1的功率分别为()AP、PB9P、4P9C.4P9、9PD.4P9、P答案 B 解析 由题意可知,两种情况下变压器输出功率均为2P,设灯泡 L2、L3的电压为U,电流为I,电阻为R,两种情况下变压器的输入电压为3U,变

4、压器输入电流为23I;图甲中L1的功率为 P13U2R9P;图乙中 L1的功率为 P2(23I)2R4P9,选项 B 正确。精品资料-欢迎下载-欢迎下载 名师归纳-第 2 页,共 7 页 -文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D

5、9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文

6、档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR

7、8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2

8、R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 H

9、L10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K

10、1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3

11、ZO6D6D9L2K85(2012 黑龙江模拟)某型号家用交流稳压器中,变压器的原、副线圈都带有滑动触头,如图所示,当变压器输入电压发生变化时,可通过向上、向下调节P1、P2的位置,使输出电压稳定在220V。现发现输出电压低于220V,欲通过调节P1、P2的位置使输出电压稳定在 220V,下列措施可行的是()A保持 P1不动,将 P2向上移B保持 P2不动,将 P1向下移C将 P1向上移,同时P2向下移D将 P1向下移,同时P2向上移答案 ABD 解析 设变压器的输入电压为U1,输出电压为U2,原、副线圈匝数分别为n1、n2;现输出电压低于220V,要调高U2,根据变压器的工作原理,U1U2n

12、1n2k,即是要减小变压比 k,可以增大n2,A 正确,也可以减小n1,B 正确,还可以增大n2的同时减小n1,D 正确。6(2012 广东茂名一模)远距离输电装置如图所示,升压变压器和降压变压器均是理想变压器,当K 由 2 改接为 1 时,下列说法正确的是()A电压表读数变大B电流表读数变大C电流表读数变小D输电线损失的功率减小答案 AB 解析 由 U2n2n1U1知,当 K 由 2 改接为 1 时,升压变压器的原线圈匝数不变,副线圈匝数变大,输送电压变大,降压变压器的输入电压和输出电压均变大,电压表示数变大,精品资料-欢迎下载-欢迎下载 名师归纳-第 3 页,共 7 页 -文档编码:CR8

13、S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R

14、6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL

15、10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1

16、K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 Z

17、O6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9

18、L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档

19、编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8选项 A 正确;降压变压器的输出电压变大时,流过灯泡的电流I灯也变大,输电线上的电流I线也随着 I灯的变大而变大,所以电流表读数变大,选项B 正确而 C 错误;I线变大时,输电线损失的

20、功率P线I2线R 变大,选项D 错误。7(2012 郑州一模)如图所示,有一理想变压器,原、副线圈的匝数比为n,原线圈接正弦交流电,电压为U,输出端接有理想电压表、理想电流表和一个电动机,电动机线圈的电阻为 R,当输入端接通电源后,电流表的读数为I,电动机带动一重物匀速上升,下列判断正确的是()A 原线圈中的电流为nIB电压表的读数为IRC电动机的输入功率为I2RD变压器的输入功率为UIn答案 D 解析 由 I1n2n1I2可得,I1In,选项 A 错误;对于含有电动机的非纯电阻电路,当电动机转动时,电动机两端电压大于IR,选项 B 错误;输出电压U2n2n1U1Un,输出功率P出U2I2UI

21、nP入,选项 C 错误而 D 正确。8(2012 长春调研)如图甲中的变压器为理想变压器,原线圈的匝数n1与副线圈的匝数n2之比为 10 1。变压器的原线圈接如图乙所示的正弦交流电,两个阻值分别为20的定值电阻串联接在副线圈两端,电压表为理想电表。则()精品资料-欢迎下载-欢迎下载 名师归纳-第 4 页,共 7 页 -文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R

22、6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL

23、10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1

24、K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 Z

25、O6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9

26、L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档

27、编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8

28、S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8A原线圈上电压的有效值为100V B原线圈上电压的有效值为502V C电压表的读数为5.0V D变压器的输入功率为2.5W 答案 B 解析 由题图乙可以看出,电压的最大值为100V,有效值UUm2,即原线圈上电压的有效值是502V,A 错误,B 正确;由变压器原理可知U1U2n1n2,副线圈上电压的有效值为U25 2V,由电路关系可知电压表读数为522V,C 错误;由变压器的功率关系P1P2,P2U222R1.25W,因此输入功率P1是 1.2

29、5W,D 错误。二、非选择题9在远距离输电时,要尽量考虑减少输电线上的功率损失。有一个电站,输送的电功率 P500kW,当使用 U5kV 的电压输电时,测得安装在输电线路起点和终点处的两只电能表一昼夜表示数相差4800kW h。求:(1)输电效率 和输电线总电阻r。(2)若想使输电效率提高到98%,又不改变输电线,那么电站应使用多高的电压向外输电。答案(1)60%20(2)22.4kV 解析(1)由于输送功率P500kW,一昼夜输送电能EPt12000kW h,终点得到的电能 E7200kW h,因此效率 60%。输电线上的电流可由IPU计算,I100A,而输电线损耗功率可由PrI2r 计算,

30、其中Pr480024kW 200kW,因此可求得r20。(2)输电线上损耗功率PrPU2r1U2,原来 Pr 200kW,现在要求Pr10kW,计算可得输电电压应调节为U22.4kV。10一台理想变压器原、副线圈匝数比为10 1,原线圈接u100 2sin100 t(V)的交变电压、副线圈两端用导线接规格为“6V12W”的小灯。已知导线总电阻r 0.5 ,试求:副线圈应接几盏小灯?这些小灯应如何连接才能使这些小灯都正常发光?答案 4 盏并联解析 由U1U2n1n2,副线圈两端电压的有效值U2U1n2n1100110V10V 导线上的电压U线 10V6V4V 精品资料-欢迎下载-欢迎下载 名师归

31、纳-第 5 页,共 7 页 -文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO

32、6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L

33、2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编

34、码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S

35、10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6

36、Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL1

37、0B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8副线圈中的输出电流I240.5A8A 每个小灯的额定电流IPU126A2A 应接小灯的盏数:n824(盏)连接方式为并联。11(2012

38、济宁模拟)水力发电具有防洪、防旱、减少污染多项功能,现在水力发电已经成为我国的重要能源之一。某小河水流量为40m3/s,现欲在此河段安装一台发电功率为1000千瓦的发电机发电。(1)设发电机输出电压为500V,在输送途中允许的电阻为5,允许损耗 总功率的5%,则所用升压变压器原、副线圈匝数比应是多少?(2)若所用发电机总效率为50%,要使发电机能发挥它的最佳效能,则拦河坝至少要建多高?(g 取 10m/s2)答案(1)1 20(2)5m 解析(1)设送电电流为I,损耗的功率为P耗,导线电阻为R线,由 P耗 I2R线得:IP耗R线10001030.055A100A 设送电电压为U送,由 PIU

39、得:U送PI1000103100V1104V 则升压变压器原、副线圈匝数比:n原n副U原U送50010000120(2)发电时水的重力势能转化为电能,故50%mghPt其中mtVt110340kg/s4104kg/s 所以 hPtmg0.510001034104100.5m5m 12三峡水利枢纽工程是长江流域治理开发的关键工程,是中国规模最大的水利工程,枢纽控制流域面积为1.0106km2,占长江流域面积的56%,坝址处年平均流量为Q4.511011m3。水利枢纽的主要任务包括防洪、发电、航运三方面。在发电方面,三峡电站安装水轮发电机组26 组,总装机容量(指 26 台发电机组同时工作的总发电

40、功率)为 P1.82107kW,年平均发电量约为W8.401010kW h。该工程已全部竣工,电站主要向华中、华东电网供电,以缓解这两个地区的供电紧张局面。阅读上述资料,解答下列问题(水的密度 1.0103kg/m3,g 取 10m/s2):精品资料-欢迎下载-欢迎下载 名师归纳-第 6 页,共 7 页 -文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL

41、10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1

42、K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 Z

43、O6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9

44、L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档

45、编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8

46、S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R

47、6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8(1)若三峡电站上、下游水位差按h100m 计算,试推导三峡电站将水流的势能转化为电能的效率的公式,并计算出效率的数值。(2)若 26 台发电机组全部建成并发电,要达到年发电量的要求,每台发电机组平均发电时间 t 为多少天?(3)将该电站的电能输送到华中地区,送电功率P14.5 105kW,采用超高压输电,输电电压为U500kV,而发电机输出的电压约为U018kV。若输电线上损耗的功率为输电功率为 5%,求发电站的升压变压器原、副线圈的匝数比和输电线路的总

48、电阻。答案(1)WQgh67%(2)192.3 天(3)925027.8解析(1)一年中水流做功(即减少的势能)WQ gh。水流的势能转化为电能的效率 WWWQgh将数据代入上式得 67%。(2)设每台发电机组平均年发电n 天,则 WPt即 Pn24W所以 nW24P8.4010101.8210724天192.3 天(3)升压变压器原、副线圈的匝数比n1n2U0U185009250输电线上的电流IP1U900A 损失功率 P损5%P1I2r,所以 r27.8 。更多试题下载:(在文字上按住ctrl即可查看试题)高考模拟题:高考各科模拟试题【下载】历年高考试题:历年高考各科试题【下载】高中试卷频

49、道:高中各年级各科试卷【下载】高考资源库:各年级试题及学习资料【下载】高考资源库:各年级试题及学习资料【下载】精品资料-欢迎下载-欢迎下载 名师归纳-第 7 页,共 7 页 -文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档

50、编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8S10T2R6Q4 HL10B3K1K4F3 ZO6D6D9L2K8文档编码:CR8

展开阅读全文
相关资源
相关搜索

当前位置:首页 > 教育专区 > 高考资料

本站为文档C TO C交易模式,本站只提供存储空间、用户上传的文档直接被用户下载,本站只是中间服务平台,本站所有文档下载所得的收益归上传人(含作者)所有。本站仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。若文档所含内容侵犯了您的版权或隐私,请立即通知淘文阁网,我们立即给予删除!客服QQ:136780468 微信:18945177775 电话:18904686070

工信部备案号:黑ICP备15003705号© 2020-2023 www.taowenge.com 淘文阁