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                      ѹʲԭУ鷽

                      :ʱ:2019-07-03 13:53:29  Դ:  Ķ:13 ]
                      0?
                      ΢װõĹ㷺ʹ˶λ·Ľ߷ʽȻװõУڶԱѹѹȼCT ȼӿصĿԱУʱҪǵƽλȥȷŵԱһѵĴӱԭֳʵʵԾ˲Уһ㷽
                      1?ѹѵ
                      Ϊлⲿʱ̵ĵӦλУͷֵУֵУͨƵƽͬʱӦ۳·΢νװλУ͵ƽǺܷ
                      1.1 λ
                      Yd ͬλ 30ֱɱѹݲʹǵķֵͬҲܴIJƽҪУУһ Y Ϊ׼ d ʹ d λ Y λһһ d Ϊ׼ʹ Y λ d һ
                      1.1.1 Y У
                      Y 3 ֱʸ12 11 Уλкⲿ·ʱ I al I AH λֻͬҪֵͬɵ䲻ƽΪ
                      1.1.2 У
                      3 ֱʸ11 12 Уλкⲿ·ʱ I ah I AL λֻͬҪֵͬɵ䲻ƽΪ
                      1.2 ֵУ
                      ڱѹıʵʹõ CT ֮䲻ȫһĹϵкⲿʱѹ CTĶεֵȫͬʹλУԪĵֵҲͬлⲿʱ޷Ϊ 0 Ĺϵ
                      ΢ͱѹװϽзֵУ
                      ַͨй
                      һһΪ׼һĵͨһϵ㵽׼ȡַװöֵͶ涼DzֵٰࣩԾDzַ
                      ôֵķȡ Ie ôֵĸӦĶֵͶҲDz Ie ôֵDzõַ
                      1.3
                      ڸѹ Y Եӵصıѹѹ·ϷӵعʱY ڱѹѹΪd ڱѹѹ d ƽӦװòȡʩʹԪ
                      Y УıѹY ѾӦ֮ѽȥûҪٲȡʩ УıѹӦ Y в
                      2?ѹ֤
                      ĿǰڱѹݲװΪڲʱĶȼɿⲿϵIJƽþбƶߵIJԪ
                      ͬͺŵݲװԪĶԸͬҪ¼ͼ 1 ʾ
                      ʽ
                      б ʽ
                      ͼ 1
                      2.1 7UT61 ߵ֤
                      2.1.1 Уijü㹫ʽ
                      1withoutڲΧޱѹԵӵػΪԵӵעһָӵϵͳȦϵͳӵϵͳеıѹd ӵϵͳбԵ㲻ӵصıѹ Y 㹫ʽΪ
                      ʽ 1
                      ʽIAIBIC Ϊ̵ʵʲƶĸ IL1IL2IL3 ΪⲿĶεֵ
                      2 o eliminationʩþ£
                      ʽIL1IL2IL3IAIBIC ͬ˾Yn/d11 ߵµ Y ɷֹӵعʱڽӵعʱȻή
                      3 V4.6 ϰ汾 7UT612 Լе 7UT613 װѹͲвͬľãearthedwinding Y0/d11 ʱ d11 ĵ󷽳£
                      ʽ 3
                      4 V4.6 ϰ汾 7UT612 Լе 7UT613 װãisolated winding Y0/d11 ʱ d11 ĵ󷽳£
                      ʽ 4
                      2.1.2
                      Ϊ diff 12
                      ƶΪ stab 12
                      ʽе I1I2 Ϊ㵽ֵѽλתĵ
                      2.1.3 ֤
                      ֪ѹ 1 ʾ7UT61 װöֵ趨 2ʾ

                      Yno/d11 ѹ ѹ
                      ѹ S N 480MVA
                      ѹȼ U N /kV 236 21
                      CT nCT 1600/5 10000/5
                      ѹһε /kA 1.174 13.197
                      ѹε /A 3.67 6.60
                      2ֵ趨
                      1221 Pickup Value of Differential Curr 0.30 I/InO1226A T I-DIFF> Time Delay 0.00 sec
                      1231 Pickup Value of High Set Trip 4.8 I/InO
                      1236A T I-DIFF>> Time Delay 0.00 sec
                      1241A Slope 1 of Tripping Characteristic 0.251242A Base Point for Slope 1 of Charac. 0.4 I/InO1243A Slope 2 of Tripping Characteristic 0.501244A Base Point for Slope 2 of Charac. 2.50 I/InO϶ֵȷñбÿһбѡȡ3 ʾ
                      3ο
                      k1=0.25 k2=0.5
                      IrId 1.60.3 20.4 4.61.05 51.25I1 0.95 1.2 2.825 3.125
                      I2 0.65 0.8 1.775 1.875
                      1
                      У̱ȽϼֻϱıôֵĶӵλϵʵʱѹĽλΪѹǰѹ 210 1 Ϊ϶ I1 ΪѹI2 Ϊѹࣩ
                      I1=0.953.67=3.487A
                      I2=0.656.6=4.29A
                      õΪۼıԲУʱԹ̶ѹ I1ٵѹ I2̵ֱʵʶֵۼֵбȽ֤ñƶ
                      2
                      ڱȽ鷳Ҫǵ㷨Уǿͨ󷽳мñѹ Y d ò Y 㹫ʽùʽ 2d㹫ʽùʽ 4
                      ͬ 1 Ϊ϶ I1 ΪѹI2 Ϊѹࣩ
                      ѹࣺIA= IL1=1.5IA=1.53.487=5.23A
                      ѹࣺIA= IL1= 17.58A
                      ҪעʱλΪ 180װõƿԶһ㶼ֱ ABCʱԲDz಻ƽֻעIJƶ
                      4 Ϊ͵ʱۼ
                      4ο
                      K1=0.25 K2=0.5
                      IrId 1.60.3 20.4 4.61.05 51.25
                      Y 3.487 0 4.404 0 10.37 0 11.47 0㦤 4.29 210 5.28 210 11.715 210 12.375 210㵥
                      Y 5.23 0 6.61 0 15.56 0 17.21 0㦤 17.58 180 21.64 180 48 180 50.7 1803?
                      ѹΪѹӦ㹻΢װ෱㷨ͬ䲻ֻҪǰܵıԭУ鷽ͨϵʵһ۾ڱѹУһܹӦ
                      οף
                      [1] ҵͨ . ϵͳ̵ʵüʴ𣨵ڶ棩[M]. й1999.
                      [2] ϵͳ̵ԭİ棩[M]. й2010.
                      [3] 7UT613 װ˵
                      [4] PCS-985T װ˵
                      [5] DGT_801 ϵʽѹװü˵

                      վԴΪתṩ߲οκӮаȨϵԱɾ ķwww.cjjfamily.comĺ͹ټڿ־õĺϵ԰ͻͶ.

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