China has developed a world-first high-voltage synchronous condenser, reviving a century-old grid stabiliser technology to support the country’s rapid transition to renewable energy, according to a state media report.The state-run China Electric Power News said on April 10 that a 35-kilovolt direct-connection rotating machine developed by Dongfang Electric Machinery had successfully passed testing earlier that day.The successful test made Dongfang’s synchronous condenser the first in the world...