Multi-objective short circuit current fault current limiting device

• Main Authors: CHEN ZHIGUANG, TU QINGRUI, QIU JIAN, LI SHENGXING, HUANG MINGHUI, ZHU ZHENG, ZENG GENGHUI, LI YIQUAN, WANG FENG, LI SHUAIHU
• Format: Patent
• Language: English
• Published: 13.05.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model discloses a multi-objective short circuit current fault current limiting device which comprises a system power supply, a grid-connected circuit, an inverter circuit and a main control system. Each single-phase circuit of the grid-connected circuit is connected in series with a short circuit current limiting reactor and a fast closing switch, and is connected in series with the system power supply through the short circuit current limiting reactor. Each fast closing switch is connected in parallel with a metal oxide voltage limiter and a series compensation capacitor. The inverter circuit comprises an A phase passive filter, a B phase passive filter and a C phase passive filter, wherein the filters are respectively connected with each short circuit current limiting reactor through a fast closing switch. The input end of each single-phase passive filter is connected with the alternating current side of an intermediate frequency transformer group. The direct current side of each intermediate frequency transformer group is connected with an IGBT type inverter full bridge. Each IGBT type inverter full bridge is connected with an inverter full bridge direct current side capacitor. The multi-objective short circuit current fault current limiting device provided by the utility model can take into account the comprehensive performance of reliability, rapidity, low cost and other objectives when a short circuit fault occurs.