Method and device for measuring direct current resistance of tubular bus non-disassembly converter transformer winding

• Main Authors: HE PING, HAO JIAN, HE DANDONG, LI LONGFEI, XU GUANGHU, ZHANG WEINING, ZHANG YONG, YANG DINGQIAN, DU JIABAO, WANG XUEBIN, DU ZHAOGUANG, ZHANG LICHENG
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2024
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides a method for measuring direct-current resistance of a tubular bus non-disassembly converter transformer winding, and belongs to the field of transformer fault diagnosis. Comprising the following steps: removing a flexible lead between a converter transformer tubular bus and an overhead line as well as a grounding copper bar; a converter transformer valve side grounding knife switch is separated; the measuring device is connected with the tubular bus and the converter transformer winding; the method comprises the following steps: respectively connecting a three-phase network side tubular bus through a measuring device to measure the direct current resistance of each phase winding, and calculating a network side valve side resistance reduction value and a ratio; and evaluating the grid-side and valve-side winding defects according to the grid-side and valve-side resistance reduction value and the ratio. The invention further provides a device for measuring the direct-current resistance of