A voltage transformer neutral point direct current suppression apparatus test system

• Main Authors: CAI LICUN, DONG YIFENG, XU TAO, LI JUAN, HU YONGXIONG, CHANG ZHONGTING, ZHANG KUN
• Format: Patent
• Language: English
• Published: 23.09.2015
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a voltage transformer neutral point direct current suppression apparatus test system comprising a direct current charging unit, an alternating current charging unit, a trigger valve Vaux, an output terminal and a grounding terminal. One terminal of the alternating current charging unit and one terminal of the direct current charging unit are connected to the output terminal through the trigger valve Vaux. The output terminal is used for connection to a high-voltage terminal test device TO. The other terminal of the alternating current charging unit and the other terminal of the direct current charging unit are connected to the grounding terminal. The grounding terminal is used for grounding after being connected to a grounding terminal of the test device. The direct current charging unit is composed of an LC resonance circuit and a direct current switching mode convertor circuit. The alternating current charging unit is composed of an LC resonance circuit and an alternating current switching mode convertor circuit. A recombination current corresponding to an actual working condition is generated by means of recombining an alternating current with a direct current. The recombination current is then applied to the test device to carry out corresponding examining, so that testing of the current and voltage stress of a voltage transformer neutral point direct current suppression apparatus is realized.