Method for measuring exciting current of current transformer

• Main Authors: ZHOU QI, SHEN JIANLIANG, CHEN HUANJUN, ZHANG WEIHUA, WEI LIANGSEN, ZHOU YI, LU JIAQI, LI HANGKANG, XU LINGJIE, ZHANG YUEPING, ZHU ZHONGYE, NAN HAO, GUO PENG, LU RAN, CHEN XIAO, LIU YONG, SHI JIXIANG, FU YUEJIANG, LYU JIFAN, KONG XIANGFENG, HUA JING
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a method for measuring exciting current of a current transformer. According to the invention, after rated and lower limit voltage points of each test point are obtained throughcalculation, cross-flow AC output needs to be applied to a primary end, and a secondary loop is disconnected and accessed to a measurement system; in the gradual increasing process of the primary endcross-flow current, the secondary end gradually generates induced voltage, and when a previously calculated rated or lower limit test point is reached, the primary current under the current conditionis recorded, and the phase difference between the primary current and a secondary induced voltage channel is also recorded; and meanwhile, the current value, the ratio difference and the angular difference data under the current percentage point condition are calculated. After various test data of the current transformer are measured, the test data and the rated data of the current transformer are substituted into the calc