Relay protection method for intelligent inverter distributed power supply short circuit fault

• Main Authors: GAO JING, LI CHENGGANG, TIAN CHUNGUANG, CUI XISHENG, YAO ZHIZHONG, ZHANG YIZHU, WANG CHANGSHENG, BI ZHENGJUN, ZHANG SHUO, GAO CHANGZHENG, LYU XIANGYU
• Format: Patent
• Language: Chinese; English
• Published: 07.11.2017
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention relates to a relay protection method for an intelligent inverter distributed power supply short circuit fault, which belongs to the technical field of distributed power supply fault protection. The method comprises the steps of three-phase short circuit state protection, two-phase short circuit state protection and single-phase short circuit state protection. According to the invention, the inverter distributed power supply short circuit fault is judged, and the method automatically and intelligently turns on a corresponding protection command; accordingly, three-phase short circuit state protection, two-phase short circuit state protection or single-phase short circuit state protection is carried out respectively; by protecting a relay, the safety of the entire power grid line is ensured; the method has the advantage of short judging time and is quick and effective; the probability of damage to other electrical equipment in a power grid due to the circuit fault can be greatly reduced; and the m