Bus coupler dead zone protection device suitable for 110 kilovolt network characteristics

• Main Authors: LI ZHONGLIANG, LI ZHENG, SONG QIANG, WANG YUEHUI, WANG XIAOBAI, LIU FANG, SONG XIAO, RONG JIAPENG
• Format: Patent
• Language: Chinese; English
• Published: 09.03.2021
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention relates to a buscouple dead zone protection device suitable for 110 kilovolt network characteristics, and the device is characterized in that the input end of a four-input OR gate (3-1)is connected with buscouple three-phase overcurrent (buscouple Ia, buscouple Ib and buscouple Ic) and a bus 3U0 controlled by 'additional dead zone control words', and the output end of the four-inputOR gate (3-1) is connected with the input ends of two input AND gates (3-2); connecting the other input ends of the two input AND gates (3-2) with a bus differential jump bus coupler, connecting theoutput ends of the two input AND gates (3-2) with the input end of a delay action circuit (33), connecting the output end of the delay action circuit (33) with the input ends of two input AND gates (34), and connecting the other input end of the two input AND gate integrated circuit (34) with the output end of a delay action circuit (35); and employing the output ends of the two input AND gates (34) for sealing the bus coup