Current quick-break protection method without being matched with starting current of motor

The invention discloses a current quick-break protection method without matching with a motor starting current. The method comprises the following steps: setting a motor current quick-break protection fixed value; a motor protection device constant value setting calculation mode; measuring the effec...

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Hauptverfasser:	CHEN MING, DUAN YANQING, WANG YUNKAI, ZHANG NANHUI, HOU RUIWEN, ZOU XUEXIANG, YAN FENG, LEI XINGYU, LU SHIMA, SUN XI, LI RUI, YIN RAOFANG, KONG ZHEN, LUO XINYU, ZHANG WEI, YU XIAO, YANG YI, YANG LIU, TANG QIANG, YANG RUIHUA, SONG YUANYUAN, PAN WEIDONG, SHEN JI, JIAO BO, LI YUEHAO, LI QINGXUAN, OUYANG JINSONG, CHEN MENGYUAN, YANG XINYU, ZI RONGTAO, FENG MENG, ZHANG XIAO, MAO XUN, CHENG PENG, LIU BO, ZHENG TAO, HU YU, MIAO JI, HE YUFENG, QIAN QINGWEI, LI JUCHENG, WU QINGRU, FENG YAOYU, CHEN JIONG, LIU SHAOJUN, ZHANG JUNYUN, YANG JINGHUA, CHEN HAIXI, ZHANG YONGMING, HUANG ZHIHUA, LI HUI, HU SHUYI, SU DONGPING, SONG CHANGYONG, ZHOU YING, ZHU SHENG, CHEN WENHAI, PENG LIDAN, SONG QINGLIN, LIU HONGBING, YAN DINGQIANG, XIE TIANZHU, ZHANG CHUNGANG, XU YUE, JIANG QIUNAN, LI YINGZHUO, TANG SHIYIN, LI HAITAO, LIU ZHIHONG, WANG GUOHAI, ZHANG GUOWU, XIE YIFENG, CHEN DEKAI, YANG SHOUQUAN, YANG PENGJIE, HUANG XIANG, LI XIONGLIANG, LI LEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION
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Beschreibung
Zusammenfassung:	The invention discloses a current quick-break protection method without matching with a motor starting current. The method comprises the following steps: setting a motor current quick-break protection fixed value; a motor protection device constant value setting calculation mode; measuring the effective value of the electric quantity in the starting process of the motor and storing data; determining the change rate of the motor starting current relative to time in the starting process; calculating a current quick-break protection constant value and verifying the sensitivity; and the generated current quick-break protection constant value is stored in a read-only memory EEPROM and is called by a device relay protection module program. By utilizing the difference of the motor starting current and the short-circuit fault current in the aspect of change rate, the current quick-break protection of the relay protection device does not need to be matched with the motor starting current, so that the sensitivity and t