Development of China's protection technology is developed with the development of power systems, power systems continuously improve the reliability and security requirements, will require protection technology to make innovations in order to cope with the new power system requirements. Compared with

The our country protects after the electricity technical development is along with the electric power system of development and development of, the electric power system's request toward the credibility for circulate and safety continuously raises, also wills beg to protect the technique to do an in