BEIJING, Aug. 26 (Xinhua) -- Nantong City in east China's Jiangsu Province has recently managed to apply artificial intelligence (AI) algorithms for low-voltage load adjustments in a bid to solve three-phase imbalance in low-voltage circuit, according to source with State Grid Nantong Power Supply Company.
Through AI algorithms, installation of automatic adjustment devices in selecting areas with larger load fluctuations could be carried out, which is the first in Jiangsu for such way of adjusting low-voltage circuit load, according to Zhang Gufeng, director of control center of Nantong Sanxin power supply service company.
"After nearly two months of trial, the average three-phase imbalance of the substation has been reduced from 75.91 percent to 20.29 percent, with an adjustment accuracy rate of 99.92 percent. The voltage for end users of the substation has also been increased by 4 to 5 volts, meeting the user demand", according to Li Zhijiang, head for Wenli village distribution substation of State Grid Nantong Power Supply Company.
The three-phase imbalance in low-voltage circuit refers to the situation in the power system where the amplitudes of the three-phase current or voltage are inconsistent, and the difference in amplitude exceeds the specified range, leading to circuit and power quality problems. It is noted that this is commonly seen during peak power load in summer, winter or during holidays when there is a sudden load increase.
The low-voltage circuit load adjustment through AI model will be promoted more widely after completing all the testing and experiment at the substation, according to Xu Chunlei, deputy director with distribution department with State Grid Jiangsu Electric Power Co., Ltd. (Edited by Niu Huizhe with Xinhua Silk Road, niuhuizhe@xinhua.org)
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