问题
问答题 简答题
强行励磁起什么作用？
答案
参考答案：
当系统电压大大下降时，例如突然短路时，发电机的励磁电源会自动迅速增加励磁电流，这种作用叫强行励磁。
A、稳定度。通过增加励磁，抬高功角曲线，从而使系统维持动态稳定。
B、在短路切除后，使电压迅速恢复。提高带时限的过流保护动作
的可靠性。
搜题请搜索小程序“爱下问搜题”
强行励磁起什么作用？
参考答案：
当系统电压大大下降时，例如突然短路时，发电机的励磁电源会自动迅速增加励磁电流，这种作用叫强行励磁。
A、稳定度。通过增加励磁，抬高功角曲线，从而使系统维持动态稳定。
B、在短路切除后，使电压迅速恢复。提高带时限的过流保护动作
的可靠性。
根据短文内容，用方框中所给词语的适当形式填空，使文章通顺、完整。（每词限用一次）
1. Life is short. While you are 3 it today, you’ll realize you are at the end of it tomorrow. So the earlier you start to value your life, the earlieryou can 4 it. 2. You might not be successful 5 you don’t study hard, although a lot of successful people haven’t 6 higher education. 3. I don’t expect you to support (供养) me for the rest of my life, so I’m not goingto do the same for you. You will be living on your own when you 7 up. 4. You can require yourself to be nice to others, 8 you shouldn’t expect the same from others. 5. I’ve been buying the lottery ( * * ) for almost twenty 9 , but I’m still poor. I have never got the third place even once. So you have to work hard to be 10 . There is no free lunch in the world. |