AI820 3BSE008544R1
ABBAI8203BSE008544R11、变配电站继电保护的作用一、变压器的保护方式1.对于6~10kV车间变电所的主变压器,通常装设带时限的过电流保护,如果过电流保护动作时间大于0.5~0.7s时,还应装设电流速断保护。2.瓦斯保护容量在800kV.A及其以上的油浸式变压器应装设瓦斯保护,作为变压器油箱内部故障和油面降低的主保护。3.电流速断保护它与瓦斯保护相互配合,可快速切除变压器高压侧及其内部的各种故障,均为变压器的主保护。4.过电流保护是为了防止变压器外部短路引起的过电流和作为变压器主保护的后备保护而装设的继电保护装置。5.温度保护作为变压器油温升高和冷却系统工作不良的保护装置。6.单相接地保护由零序电流互感器及与之连接的电流继电器构成。作为变压器高压侧出现单相接地故障的保护。二、断路器在分闸状态,用控制开关合闸过程1.当断路器QF在分闸位置,控制开关SA在“跳闸后”位置。“工作位置”行程开关2SQ触点已闭合,控制开关SA(11,10)触点接通,常闭辅助触点QF1闭合,此时,绿灯GN接通控制小母线WC而亮平光。电流路径:WC+→1FU→SA11-10→GN→2SQ→QF1→KO→2FU→WC-2.控制开关SA切至“预备合闸”位置时:其一,控制开关SA(9,10)触点接通,SA(11,10)触点断开,绿灯GN接通闪光小母线WF,断路器位置和控制开关位置不对应,绿灯GN闪光;电流路径:WF+→SA9-10→GN→2SQ→QF1→KO→2FU→WC-其二,控制开关SA(1,3)触点接通,为“事故跳闸”音响信号接通做准备。3.控制开关SA切至“合闸”位置时:其一,控制开关SA(5,8)触点接通,合闸接触器KO接通控制小母线WC而励磁。同时,短接了绿灯GN,使其熄灭。;电流路径:WC+→1FU→SA5-8→KPJ2→2SQ→QF1→KO→2FU→WC-其二,控制开关SA(9,10)触点断开,SA(9,12)触点接通,为事故跳闸后绿灯GN闪光作准备;其三,控制开关SA(16,13)触点接通,为红灯RD的接通做好准备;其四,控制开关SA(1,3)触点断开,SA(17,19)触点接通,为“事故跳闸”音响信号接通做准备。4.合闸接触器KO动作,其两对常开触点KO闭合,合闸线圈YO接通合闸小母线WO而励磁。电流路径:WO+→3FU→KO→YO→KO→4FU→WO-5.合闸铁心动作,断路器QF合闸。6.断路器QF合闸后:其一,常闭触点QF1断开,切断合闸监视回路;其二,常开触点QF2闭合,接通分闸监视回路。合闸位置继电器KCC接通控制小母线WC而励磁;电流路径:WC+→1FU→KCC→KPJ(I)→QF2→YR→2FU→WC-其三,常闭触点QF3断开,为事故跳闸后“事故跳闸”音响回路接通做准备;其四,常开触点QF4闭合,为“跳闸回路断线”监视做准备。7.合闸位置继电器KCC动作:其一,常开触点KCC1闭合,红灯RD接通控制小母线WC而亮平光;电流路径:WC+→1FU→SA16-13→RD→KCC1→2FU→WC-其二,常闭触点KCC2断开,为“跳闸回路断线”监视做准备。8.控制开关SA弹回至“合闸后”位置:其一,控制开关SA(16,13)触点继续接通,红灯RD亮平光;其二,SA(1,3)触点又闭合,为“事故跳闸”音响回路接通做好准备。其三,控制开关SA(9,10)触点接通,SA(9,12)触点断开,为绿灯GN闪光作准备。三、断路器在合闸状态,用控制开关分闸过程1.控制开关SA切至“预备跳闸”位置时:其一,控制开关SA(14,13)触点接通,SA(16,13)触点断开,红灯RD接通闪光母线WF,断路器位置和控制开关位置不对应,红灯RD闪光;电流路径:WF+→SA14-13→RD→KCC1→2FU→WC-其二,控制开关SA(1,3)及SA(17,19)触点同时断开,切断了“事故跳闸”音响信号回路;其三,控制开关SA(11,10)触点接通,为绿灯GN亮作准备。2.控制开关SA切至“跳闸”位置,SA(6,7)触点接通,使防跳继电器电流线圈KPJ(I)及跳闸线圈YR接通控制小母线WC而励磁。电流路径:WC+→1FU→V→KCO→KPJ(I)→QF2→YR→2FU→WC-3.防跳继电器KPJ动作:其一,常开触点KPJ1闭合,用于“防跳”自保持,作用于断路器QF有可能出现的“跳跃”现象;其二,常闭触点KPJ2断开,防止合闸接触器KO回路接通;其三,常开触点KPJ3闭合。1756-OA81756-OV32E2711P-T6C20DC98043-A1601-L4-11RKD514L-CA652-01-903IC200PWR102DDIMA3-ES-16207-352S1785-L40BIC200ALG240IC200ALG264IC200ALG320IC200CHS022IC200CPU002IC200MDL650IC200MDL750IC200PWR1021756-ENBTA06B-6079-H104QUINT-PS-3*400-500ACJUSP-NS6001746-OW161747-L542IC693MDL753F2500MA132500MA14DELL390微机FIX7.0SP316SP363T2500/A121756-CNB1756-IA161756-IB16I1756-IF161786-XT1783-EMS08TTSXBLZL011756-BA11771-IBN1771-OBNSEC44006AV6643-0CD01-1AX16ES7972-OBB41-0XA0CPU343-1343-1EX30-0XEOTM-T88IVM129HFCUA-DX110DVC60101783-EMS08TP0500SRIC698CHS009IC698CRE030IC698PSA100DIC698RMX0161756-OF4-A1783-EMS08T490NRP954006AV6643‐ DD01‐1AX16EP1334‐3BA006ES7153‐1AA03‐ XB06ES7153‐2BA02‐ XB06ES7307‐1EA01‐ AA06ES7307‐1KA02‐ AA06ES7315‐2AH14‐ AB06ES7321‐1BH02‐ AA06ES7321‐1BL00‐ AA06ES7321‐1FH00‐ AA06ES7322‐1BH01‐ AA06ES7322‐1BL00‐ AA06ES7322‐1FH00‐ AA06ES7331‐7KF02‐ AB06ES7332‐5HB01‐ AB06ES7390‐1AF30‐ AA06ES7392‐1AJ00‐ AA06ES7392‐1AM00‐ AA06ES7953‐8LL20‐ AA06ES7972‐ AA02‐ XA06ES7972‐ BA12‐ XA06ES7972‐ BB12‐ XA06GK1500‐ EA026GK1561‐1AA016XV1830‐ 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