The basic principle of new types of protection which present relay protection experts have proposed, such as shape wave protection, non-channel protection and so on, is introduced.
介绍了当前继电保护专家们提出的行波保护、无通道保护等新型保护的基本原理。
The main circuit is consisted of 18 thyristors circuit and protection circuit. With the help of control subsystem, it can get the output of low frequency voltage (current) with the shape of sine wave;
主回路采用由18个晶闸管组成的三相零式电路，并辅以晶闸管的保护电路，通过控制可以得到低频正弦波的电压（电流）输出；
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