Isolating circuit of extra-high voltage direct current transmission converter

• Main Authors: BAI CHUANJUN, LU DONGBIN, HUANG ZHILING
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2021
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The utility model provides an extra-high voltage direct current transmission converter isolation circuit, which is used for an extra-high voltage direct current transmission system, the system comprises two direct current poles, and each direct current pole at least comprises two converters which are connected in series. The isolation circuit comprises a bypass switch, a current converter bus isolation disconnecting link, a current converter bus isolation switch and a bypass disconnecting link, and the bypass switch and the current converter are connected in parallel to form a parallel loop; one end of the converter bus isolation switch is connected with one end of the parallel loop; one end of the converter bus isolation switch is connected with the other end of the parallel loop; one end of the bypass disconnecting link is connected with the other end of the converter bus disconnecting link, and the other end of the bypass disconnecting link is connected with the other end of the converter bus disconnecting