Security & Protection
| Tue 19 May 2026
Beijing, May 19 -- Huaneng Lancang River Hydropower has sought patent for Frequency Signal Safety Interlocking Switching Method. This invention was developed by Dong Yuntao, Jiao Fanxiao, Sun Hong, Zhang Tao, Tian Han, Li Yonghong, Zhou Yu, Li Xuejing, Lee Hyun, Ai Xiyang, Fu Wengang, Fu Linghang, Zhao Jixiang, Lian Youming and ..