Grounding electrode line protection method, device and equipment of common grounding electrode converter station

• Main Authors: ZHOU DENGBO, HE YUANFENG, XU PANTENG, LIAO YI, WANG ZHI'EN, YAO YANCHAO, YUAN YE, YUAN HAI, ZHANG ZHUOJIE, MAO PINGTAO
• Format: Patent
• Language: Chinese; English
• Published: 19.12.2023
• 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 invention relates to a grounding electrode line protection method, device and equipment of a common grounding electrode converter station. The method comprises the steps that for a first converter station and a second converter station which share a grounding electrode, the first converter station is in bipolar balanced operation, and branch current values of all branches in a grounding electrode circuit corresponding to the first converter station are acquired; according to the magnitude of the current value of each branch, determining whether the first converter station has a grounding electrode line unbalanced current, wherein the grounding electrode line unbalanced current is related to bipolar unbalanced operation of the second converter station; and under the condition that the first converter station has the unbalanced current of the grounding electrode line, determining that the grounding electrode line corresponding to the first converter station has a short-circuit fault, and performing a bipola