GENEVA, May 3 -- ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID (No. 11 Kexiang Road, Science Park, Huangpu DistrictGuangzhou, Guangdong 510663), 南方电网科学研究院有限责任公司 (中国广东省广州市黄埔区科学城科翔路11号) filed a patent application (PCT/CN2025/086836) for "MODULAR MULTI-LEVEL DIRECT-CURRENT TRANSFORMER TOPOLOGY APPLICABLE TO MULTI-VOLTAGE-CLASS DIRECT-CURRENT POWER GRID, AND CONTROL METHOD THEREFOR" on Apr 02, 2025. With publication no. WO/2026/086105, the details related to the patent application was published on Apr 3...