题目内容
发电机输出功率为100 kW,输出电压是250 V,用户需要的电压是220 V,输电线电阻为10 Ω.若输电线中因发热而损失的功率为输送功率的4%,试求:
(1)用户得到的电功率是多少
(2)在输电线路中设置的升、降压变压器原副线圈的匝数比![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354215753654.png)
(1)用户得到的电功率是多少
(2)在输电线路中设置的升、降压变压器原副线圈的匝数比
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354215753654.png)
(1)96KW(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354216211209.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354216211209.png)
(1)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354216531199.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354222301721.png)
(2)由
得:
升压变压器副线圈两端电压为:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354223551312.png)
升压变压器原、副线圈匝数之比:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354226201164.png)
输电线上损失电压:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135422682955.png)
降压变压器原线圈两端的电压:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354228381205.png)
降压变压器原、副线圈两端的匝数之比:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354216211209.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354216531199.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354222301721.png)
(2)由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135422277595.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354223231271.png)
升压变压器副线圈两端电压为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354223551312.png)
升压变压器原、副线圈匝数之比:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354226201164.png)
输电线上损失电压:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135422682955.png)
降压变压器原线圈两端的电压:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354228381205.png)
降压变压器原、副线圈两端的匝数之比:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241354216211209.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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