题目内容
某村庄在较远的山区修建一座小型水电站,发电机输出功率为50kW,机端电压为200V,
输电距离为6kW,若输电线上允许损失的电功率为发电机输出功率的5%.
(1)若直接输电,所用输电线的电阻率为ρ=2.5×10-8Ω·m,输电线的横载面积应多大?
(2)若输电线总电阻为16Ω,用户处获得的电压为220V,采用高压输电,试计算所用
升压变压器和降压变压器原、副线圈匝数比.
输电距离为6kW,若输电线上允许损失的电功率为发电机输出功率的5%.
(1)若直接输电,所用输电线的电阻率为ρ=2.5×10-8Ω·m,输电线的横载面积应多大?
(2)若输电线总电阻为16Ω,用户处获得的电压为220V,采用高压输电,试计算所用
升压变压器和降压变压器原、副线圈匝数比.
(1)
(2)19:1
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450484468.gif)
(1)
(1分)
(1分)
(1分)
(1分)
(2)
(1分)
升压比
(1分)
(1分)
(1分)降压比
(1分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450656559.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450671871.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450671333.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241204507031650.gif)
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450718759.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450718599.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450734609.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450749639.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450765534.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120450781657.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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