US Patent Issued to HUANENG LANCANG RIVER HYDROPOWER on Sept. 8 for "Tertiary frequency modulation method for power system" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,731,991, issued on Sept. 8, was assigned to HUANENG LANCANG RIVER HYDROPOWER INC. (Kunming City, China).

"Tertiary frequency modulation method for power system" was invented by Lin Hu (Kunming City, China), Shuhong Yin (Kunming City, China), Yongjun Liu (Kunming City, China), Wangdan Ni (Kunming City, China), Dongming Zhong (Kunming City, China), Yangyicheng Li (Kunming City, China), Qing Yang (Kunming City, China) and Sen Li (Kunming City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tertiary frequency modulation method for a power system, AGC based on power plant input performs active power regulation for tertiary frequency modulation in dif...