1、良庄矿业高压供电系统短路电流计算说明书计 算：审 核：机电副总：机电矿长：机电科2011 年 1 月1良庄煤矿降压站双回路供电电源分别来自东都 110kV 变电站和成家楼110kV 变电站，东都变电站拥有的两台 SF9-31500/110 主变压器，组成良庄矿35kV 双回路电源(S 1)，东都变电站 35kV 母线最大短路容量为 773MVA，最小短路容量为 236 MVA。双回路电源架线采用 LGJ-3120 铝绞线，长度分别为5.25km、2.5km，分别叫良庄线和成良线,其中良庄线正常使用，成良线带电备用。由于东都降压站距良庄矿降压站线路比较远，所以东都 110KV 变电站单独作用按无
2、限容量计算。良庄矿煤泥热电厂(S 2)距降压站距离短，它在良庄矿降压站与良庄线并网后上网供良庄矿使用，由于距离较近，良庄矿煤泥热电厂单独作用按有限容量计算（计算电抗小于 3 时） 。良庄矿降压站内两台主变压器型号为 SF9-16000/35,两台变压器一用一备。具体供电路线：由降压站向-195 中央配电所供电的两条下井电缆规格为 YJV22-3*150-1.4km。 由降压站到北风井配电所的二条线路用 YJV22-3*120-400m 出矿后经架空线路LGJ-185-2.5km 到北风井配电所。降压站到-580 扩排泵房的两条下井电缆为 YJV22-3*185-4.6Km降压站到延深变电所的两
3、条下井电缆为 YJV22-3*150-3.5km。降压站到-195 中央变电所的两条下井电缆为 YJV22-3*150-1.4km。延深变电所到-350 中央泵房的两条电缆为 YJV22-3*150-0.7km。延深变电所到-580 中央泵房的两条电缆为 YJV22-3*150-1.1km。降压站到西岭配电所线路为 YJV22-3*150-0.8km， LGJ-120-1km。一 各元件相对基准电抗的计算：2取基准容量 =100MVA,基准电压 U =37KV,U =6.3KV；jS1j2j基准电流为： I j1= = =1.56KA 13js70Ij2= = =9.16KA2jU3.6电源阻
4、抗：1、S 1的电抗:X = = =0.1294*3jdjSs7102、良庄线架空线电抗：X =X0L =0.45.25 =0.1534 *j2jUs23710R =R0L =0.275.25 =0.1035 X = =0.185*j2jUs2371*4j 2253、S 2的电抗：X = = =0.3322*1jdjSs04、电厂至降压站电缆电抗：X =X0L =0.120.6 =0.0053*2j 2jUs237105、降压站主变压器的电抗：X = = =0.5006 *5jedjS%216.86、降压站向-195 中央配电所下井的电缆 YJV22-3*150-1.4km 电抗：X =X0L
5、 =0.081.4 =0.282 *j2jUs23.610R =R0L =0.121.4 =0.423 X = =0.508*j2j 2.*6j 2243.08.7、降压站向北风井的电抗：X =X0L =0.080.4 =0.081*j2jUs23.610R =R0L =0.150.4 =0.151 *j2j 2.3X =X0L =0.42.5 =2.52*j2jUs23.610R =R0L =0.272.5 =1.701 *j2j 2.X = + =3.211 *7j 15.8.7018、降压站向延深变电所供电电缆的电抗： X =X0L =0.083.5 =0.705*j2jUs23.6R
6、=R0L =0.123.5 =1.058 X = =1.2714*j2j 2.10*8j 22058.17.9、延深变电所向-350 中央变电所供电电缆的电抗： X =X0L =0.080.7 =0.141*j2jUs23.610R =R0L =0.120.7 =0.212 X = =0.255*j2j 2.*9j 221.04.10、-350 中央变电所向二采十三层配电点供电电缆的电抗：X =X0L =0.081.35 =0.272*j2jUs23.610R =R0L =0.260.7 =0.884 X = =0.9249*j2j 2.*10j 2284.07.11、-350 中央变电所向四
7、采大巷变电所供电电缆的电抗：X =X0L =0.081.17 =0.236*j2jUs23.610R =R0L =0.191.17 =0.56 X = =0.6077*j2j 2.*1j 2256.03.12、延深变电所向-580 中央变电所供电电缆的电抗：X =X0L =0.081.1 =0.222*j2jUs2.6104R =R0L =0.121.1 =0.333 X = =0.4002*j2jUs23.610*13j 223.0.13、-580 中央变电所向八采二层变电所供电电缆的电抗：X =X0L =0.081.6 =0.322 *j2js23.610R =R0L =0.191.6 =
8、0.766 X = =0.8353*j2jU2.*14j 2276.03.14、三采配电点向九采变电所供电电缆的电抗：X =X0L =0.081.2 =0.242*j2js23.610R =R0L =0.371.2 =1.119 X = =1.1449*j2jU2.*17j 2219.4.015、降压站向-580 扩排供电电缆的电抗：X =X0L =0.084.6 =0.927*j2js23.610R =R0L =0.14.6 =1.159 X = =1.4841*j2jU2. *18j 22159.7.016、降压站向上段钢缆机供电电缆的电抗：X =X0L =0.080.11 =0.022*
9、j2js23.610R =R0L =0.260.11 =0.072 X = =0.0753*j2jU2.*19j 220717、降压站向主洗变电所供电电缆的电抗：X =X0L =0.080.35 =0.071*j2js23.610R =R0L =0.260.35 =0.229 X = =0.2398*j2jU2.*20j 229.071.18、降压站向链条厂供电电缆的电抗：5X =X0L =0.40.24 =0.24*j2jUs23.610R =R0L =0.650.24 =0.393 X = =0.4605*j2j 2.*21j 2239.04.19、降压站向良协配电所供电电缆的电抗：X =
10、X0L =0.080.08 =0.016*j2jUs23.610R =R0L =0.650.08 =0.131 X = =0.132*j2j 2.*2j 2213.06.20、良协配电所向医院变电所供电线路的电抗：X =X0L =0.080.8 =0.161*j2jUs23.610R =R0L =0.120.8 =0.242 X = =0.2907*j2j 2.*23j 224.016.21、良协配电所向西岭电所供电线路的电抗：X =X0L =0.080.8 =0.161 *j2jUs23.610R =R0L =0.120.8 =0.242 *j2j 2.X =X0L =0.41 =1.008
11、 *j2jUs23.60R =R0L =0.271 =0.68 *j2j 2.X = + =1.5066 *24j 24.16.268.022、良协配电所向南岭变电所供电线路的电抗：X =X0L =0.080.4 =0.081*j2jUs23.616R =R0L =0.370.4 =0.37 X = =0.3788*j2jUs23.610*25j 2237.081.23、良协配电所向稀土厂供电线路的电抗：X =X0L =0.080.24 =0.048*j2js23.610R =R0L =0.370.24 =0.224 X = =0.2291*j2jU2.*26j 224.08.24、电厂至工业
12、园降压站架空线的电抗：X*j7=X0L =0.41.1 =0.03212js2371025、工业园 6300KVA 变压器的电抗：X*j8= = =1.1603 edjSU%23.610二、在最大运行方式下（东都降压站短路容量 773MVA，电厂两台机组全开）短路电流、冲击电流、冲击电流有效值及短路容量计算1、d 1点（降压站 35KV 母线）短路时的短路电流：(1)合成电抗计算：X*j29=X*j1+X*j2 =0.3322+0.0053=0.3375 X*j30=X*j3+X*j4=0.1294+0.185=0.3144(2)S1支路计算电抗：S1= X*jd1a= X*j30=0.314
13、4(3)S2支路计算电抗：X*jd1b=0.3375 =1.0159103(4)电源 S1提供的短路参数：I*jd1b= = =3.1807*30j4.7S2= I”=I0.2=I =I*jd1bI*j1 =3.18071.56=4.9619kAich=2.554.9619=12.6528kA Ich=1.524.9619=7.5421kAS0.2=1003.1807=318.07MVA(5)电源 S2提供的短路参数： 由 X*jd1b=1.0159 查表：I *0=0.98 I*0.2=0.92 I* =1.14(6)电源 S2的短路电流：Id1b= = =4.697kA pesU3701I
14、0=0.984.697=4.603kA I0.2=0.924.697=4.321kA I =1.280.5852=0.7491kAich=2.554.603=11.738kA Ich=1.524.603=6.997kA S0.2=0.92301=277MVA(7)d1的短路电流：I0=4.9619+4.603=9.5649kA I0.2=4.9619+4.321=9.2829kAI =4.9619+5.355=10.3169kA S0.2=318.07+277=595MVAich=12.6528+11.738=24.3908kA Ich=7.5421+6.997=14.5391kA2、d 2点
15、（降压站 6KV 母线）短路时的短路电流：（1）回路合成电抗如图：X*j31=X*j29X*j30= =0.1628 X*j32=X*j31+X*j5=0.1628+0.5006=0.6634314.075.（2）求分布系数：C 1= = =0.4824 C2= = =0.5178*29j75.68*301j4.628(3)求转移电抗：X *j32a= = =1.3752 X*j32b= = =1.281213Cj48.02j578.3(4)求支路计算电抗：S1= X*d2a=X*j32a=1.3752 8X*d2b=X*j32b =1.2812 =3.85643 应按无限容量计算jSe210
16、3（5）短路电流：合成电抗：X *j32=X*j31+X*j5=0.1628+0.5006=0.6634I*jd2= = =1.5074*321j64.0I”=I*jd2Ij2=1.50749.16=13.808kA S0.2=I*jd2Sj=1.5074100=150.74MVAich=2.5513.808=35.2104kA Ich=1.5213.808=20.988kA3、d 3点（-195 泵房 6KV 母线）短路时的短路电流：合成电抗：X *jd3=X*j32+X*j6+X*j7=0.6634+0.508=1.1714I*jd3= = =0.8537*31d74.I”=I*jd3Ij
17、2=0.85379.16=7.8199kA S0.2=I*jd3Sj=0.8537100=85.37MVAich=2.557.8199=19.94kA Ich=1.527.8199=11.87kA4、d 4点（北风井配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd4=X*j32+X*j7 =0.6634+3.211=3.8744I*jd4= = =0.2581*41d87.3I”=I*jd4Ij2=0.25819.16=2.3642kA S0.2=I*jd4Sj=0.2581100=25.81MVAich=2.552.3642=6.0287kA Ich=1.522.3642=3.5
18、598kA5、d 5点（延深变电所 6KV 母线）短路时的短路电流：合成电抗：X *jd5=X*j32+X*j8 =0.6634+1.2714=1.9348I*jd5= = =0.5168*51d9348.I”=I*jd5Ij2=0.51689.16=4.7339kA S0.2=I*jd5Sj=0.5168100=51.68MVA9ich=2.554.7339=12.0714kA Ich=1.524.7339=7.1955kA6、d 6点（-350 中央变电所 6KV 母线）短路时的短路电流：合成电抗：X *jd6=X*j32+X*j8+X*j9=0.6634+1.2714+0.255=2.1
19、898I*jd6= = =0.4567*61d89.2I”=I*jd6Ij2=0.45679.16=4.1834kA S0.2=I*jd6Sj=0.4567100=45.67MVAich=2.554.1834=10.6677kA Ich=1.524.1834=6.3588kA7、d 7点（二采十三层配电点 6KV 母线）短路时的短路电流：合成电抗：X *jd7=X*j32+X*j8+X*j9+X*j10=0.6634+1.2714+0.255+0.9249=3.1147I*jd7= = =0.3211*71d4.3I”=I*jd7Ij2=0.32119.16=2.9413kA S0.2=I*j
20、d7Sj=0.3211100=32.11MVAich=2.552.9413=7.5003kA Ich=1.522.9413=4.4708kA8、d 9点（辅扇硐室 6KV 母线）短路时的短路电流：合成电抗：X*jd9=X*j32+X*j8+X*j9+X*j11+X*j12=0.6634+1.2714+0.255+0.6077+0.7544=3.5519I*jd9= = =0.2815*91d5.3I”=I*jd9Ij2=0.28159.16=2.5785kA S0.2=I*jd9Sj=0.2815100=28.15MVAich=2.552.5785=6.5752kA Ich=1.522.578
21、5=3.9193kA9、d 10点（-580 中央变电所 6KV 母线）短路时的短路电流：合成电抗：X *jd10=X*j32+X*j8+X*j13=0.6634+1.2714+0.4002=2.335I*jd10= = =0.4283*10d35.210I”=I*jd10Ij2=0.42839.16=3.923kA S0.2=I*jd6Sj=0.4283100=42.83MVAich=2.553.923=10.0034kA Ich=1.523.923=5.963kA10、d 11点（八采二层变电所 6KV 母线）短路时的短路电流：合成电抗：X *jd11=X*j32+X*j8+X*j13+X
22、*j14=0.6634+1.2714+0.4002+0.8353=3.1703I*jd11= = =0.3154*1d703.I”=I*jd11Ij2=0.31549.16=2.889kA S0.2=I*jd11Sj=0.3154100=31.54MVAich=2.552.889=7.3677kA Ich=1.522.889=4.3918kA11、d 12点（三采配电点 6KV 母线）短路时的短路电流：合成电抗：X*jd12=X*j32+X*j8+X*j13+X*j14+X*j15=0.6634+1.2714+0.4002+0.8353+1.4317=4.602I*jd12= = =0.217
23、3*12d60.4I”=I*jd12Ij2=0.21739.16=1.9904kA S0.2=I*jd12Sj=0.2173100=21.73MVAich=2.551.9904=5.0756kA Ich=1.521.9904=3.0254kA12、d 13点（九采配电所 6KV 母线）短路时的短路电流：X*jd13=X*j32+X*j8+X*j13+X*j14+X*j15+X*j17=0.6634+1.2714+0.4002+0.8353+1.4317+1.1449=6.051I*jd13= = =0.1653*13d05.6I”=I*jd13Ij2=0.16539.16=1.5138kA S
24、0.2=I*jd13Sj=0.1653100=16.53MVAich=2.551.5138=3.8602kA Ich=1.521.5138=2.301kA13、d 15点（-580 水平扩排 6KV 母线）短路时的短路电流：合成电抗：X *jd15=X*j32+X*j18 =0.6634+1.4841=2.147511I*jd15= = =0.465751*4dX7.2I”=I*jd15Ij2=0.46579.16=4.2654kA S0.2=I*jd15Sj=0.4657100=46.57MVAich=2.554.2654=10.8768kA Ich=1.524.2654=6.4834kA1
25、4、d 16点（上段钢缆机 6KV 母线）短路时的短路电流：合成电抗：X *jd16=X*j32+X*j19 =0.6634+0.0753=0.7387I*jd16= = =1.3537*16d738.0I”=I*jd16Ij2=1.38379.16=12.4002kA S0.2=I*jd16Sj=1.3537100=135.37MVAich=2.5512.4002=31.6204kA Ich=1.5212.4002=18.8482kA15、d 16点（洗煤厂 6KV 母线）短路时的短路电流：合成电抗：X *jd17=X*j32+X*j20 =0.6634+0.2398=0.9032I*jd1
26、7= = =1.1072*17d9032.I”=I*jd17Ij2=1.10729.16=10.1417kA S0.2=I*jd17Sj=1.1072100=110.72MVAich=2.5510.1417=25.8614kA Ich=1.5210.1417=15.4155kA16、d 17点（链条厂 6KV 母线）短路时的短路电流：合成电抗：X *jd18=X*j32+X*j21 =0.6634+0.4605=1.1239I*jd18= = =0.8898*18d239.I”=I*jd18Ij2=0.88989.16=8.1506kA S0.2=I*jd18Sj=0.8898100=88.9
27、8MVAich=2.558.1506=20.784kA Ich=1.528.1506=12.39kA17、d 19点（良协配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd19=X*j32+X*j22 =0.6634+0.132=0.795412I*jd19= = =1.2572*19dX754.0I”=I*jd19Ij2=1.25729.16=11.5162kA S0.2=I*jd19Sj=1.2572100=125.72MVAich=2.5511.5162=29.3663kA Ich=1.5211.5162=17.5046kA18、d 20点（医院配电所 6KV 母线）短路时的短
28、路电流：合成电抗：X *jd20=X*j32+X*j22+X*j23=0.6634+0.132+0.2907=1.0861I*jd20= = =0.9207*201d86.I”=I*jd20Ij2=0.92079.16=8.4338kA S0.2=I*jd20Sj=0.9207100=92.07MVAich=2.558.4338=21.5063kA Ich=1.528.4338=12.8194kA19、d 21点（西岭配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd21=X*j32+X*j22+X*j24=0.6634+0.132+1.5066=2.302I*jd21= = =0.
29、4344*21d30.I”=I*jd21Ij2=0.43449.16=3.9791kA S0.2=I*jd21Sj=0.4344100=43.44MVAich=2.553.9791=10.1468kA Ich=1.523.9791=6.0483kA20、d 21点（南岭配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd22=X*j32+X*j22+X*j25=0.6634+0.132+0.3788=1.1742I*jd22= = =0.8516*21d74.I”=I*jd22Ij2=0.85169.16=7.801kA S0.2=I*jd22Sj=0.8516100=85.16MVA
30、ich=2.557.801=19.893kA Ich=1.527.801=11.8576kA21、d 23点（稀土厂 6KV 母线）短路时的短路电流：合成电抗：X *jd23=X*j32+X*j22+X*j26=0.6634+0.132+0.2291=1.024513I*jd23= = =0.976*231dX045.I”=I*jd23Ij2=0.9769.16=8.941kA S0.2=I*jd23Sj=0.976100=97.6MVAich=2.558.941=22.7994kA Ich=1.528.941=13.5902kA22、d 24点（工业园 35kV 母线）短路时的短路电流：(1
31、)回路合成电抗如图：X*jd24a=X*j31+X*j27=0.1628+0.0321=0.1949(2)求分布系数：C 1=0.482 C2=0.518(3)求转移电抗：X *jd24a= = =0.4044 X*jd24b= = =0.37631*4Xajd8.092*4Caj518.09(4)求支路计算电抗：S1= X*jd23=X*jd24a=0.4044 X*j23= X*j24b =0.3763 =1.1327jSe2103(5)短路电流：电源 S1提供的短路参数：I*jd24= = =2.472kA*24ajdX0.I”=I0.2=I =I*jd24Ij=2.4721.56=3.
32、858kA S0.2=I*jd24 Sj=2.473100=247.3MVAich=2.553.858=9.8379kA Ich=1.523.858=5.8642kA电源 S2提供的短路参数：电源 S2的额定电流：Ies2= = =4.697kApesU32701由 X*jd24b=1.1327 查表：I *0=0.84 I*0.2=0.8 I* =0.95I0=4.6970.84=3.945kA I0.2=4.6970.8=3.758kA I =4.697 0.95=4.462kA14ich=2.553.945=10.06kA Ich=1.523.945=5.99kA S0.2=0.8301
33、=240.8MVAd24点短路电流：I0=3.858+3.945=7.803kA I0.2=3.858+3.758=7.616kA I =3.858+4.462=8.32kA S0.2=247.3+240.8=488.1MVAich=9.8379+10.06=19.8979kA Ich=5.9642+5.99=11.8542kA25、d 25点（工业园 6kV 母线）短路时的短路电流：合成电抗：X *jd25=X*j31+X*j27 X*j28=0.1628+0.0321+1.1603=1.3552I*j25= = =0.7379*251d3.I”=I*jd25Ij2=0.73799.16=6
34、.759kA S0.2=I*jd25Sj=0.7379100=66.34MVAich=2.556.759=17.2358kA Ich=1.526.759=10.2739kA三、在最小运行方式下（东都降压站短路容量 236MVA，电厂两台机组全停）短路电流、冲击电流、冲击电流有效值及短路容量计算1、d 1点（降压站 35KV 母线）短路时的短路电流：(1)合成电抗计算：S 的电抗:X = = =0.4237 X*j33=X*j3+X*j4=0.4237+0.185=0.608711Sdj2360(2)电源 S1提供的短路参数：I *jd1= = =1.6428*1d6087.(3)d1的短路电流
35、：I”=I0.2=I =I*jd1I*j1=1.64281.56=2.5628kAich=2.552.5628=6.8931kAIch=1.522.5628=4.1089kAS0.2=1001.6428=173.28MVA152、 d2点（降压站 6KV 母线）短路时的短路电流：合成电抗：X *j34=X*j33+X*j5 =0.6087+0.5006=1.1093I*j2= = =0.901534109.I”=I*jd2Ij2=0.90159.16=8.2575kA S0.2=I*jd2Sj=0.9015100=90.15MVAich=2.558.2575=21.057kA Ich=1.52
36、8.2575=12.5513kA3、d 3点（-195 泵房 6KV 母线）短路时的短路电流：合成电抗：X *jd3=X*j34+X*j6 =1.1093+0.508=1.6173I*jd3= = =0.6183*31d67.I”=I*jd3Ij2=0.61839.16=5.6636kA S0.2=I*jd3Sj=0.6183100=61.83MVAich=2.555.6636=14.4422kA Ich=1.525.6636=8.6087kA4、d 4点（北风井配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd4=X*j34+X*j7 =1.1093+3.211=4.3203I*j
37、d4= = =0.2315*41d320.I”=I*jd4Ij2=0.23159.16=2.1202kA S0.2=I*jd4Sj=0.2315100=23.15MVAich=2.552.1202=5.4066kA Ich=1.522.1202=3.2227kA5、d 5点（延深变电所 6KV 母线）短路时的短路电流：合成电抗：X *jd5=X*j34+X*j8 =1.1093+1.2714=2.3807I*jd5= = =0.42*51d3807.2I”=I*jd5Ij2=0.429.16=3.8476kA S0.2=I*jd5Sj=0.42100=42MVAich=2.553.8476=9
38、.8114kA Ich=1.523.8476=5.8484kA6、d 6点（-350 中央变电所 6KV 母线） 短路时的短路电流：16合成电抗：X *jd6=X*j34+X*j8+X*j9=1.1093+1.2714+0.255=2.6357I*jd6= = =0.3794*61d357.2I”=I*jd6Ij2=0.37949.16=3.4754kA S0.2=I*jd6Sj=0.3794100=37.94MVAich=2.553.4754=8.8622kA Ich=1.523.4754=5.2825kA7、d 7点（二采十三层配电点 6KV 母线）短路时的短路电流：合成电抗：X *jd7
39、=X*j34+X*j8+X*j9+X*j10=1.1093+1.2714+0.255+0.9249=3.5746I*jd7= = =0.2798*71d546.3I”=I*jd7Ij2=0.27989.16=2.5625kA S0.2=I*jd7Sj=0.2798100=27.98MVAich=2.552.5625=6.5344kA Ich=1.522.5625=3.895kA8、d 9点（辅扇硐室 6KV 母线）短路时的短路电流：合成电抗：X*jd9=X*j34+X*j8+X*j9+X*j11+X*j12=1.1093+1.2714+0.255+0.6077+0.7544=3.9978I*j
40、d9= = =0.2501*91d78.3I”=I*jd9Ij2=0.25019.16=2.291kA S0.2=I*jd9Sj=0.2501100=25.01MVAich=2.552.291=5.8421kA Ich=1.522.291=3.4823kA10、d 10点（-580 中央变电所 6KV 母线）短路时的短路电流：合成电抗：X *jd10=X*j34+X*j8+X*j13=1.1093+1.2714+0.4002=2.7809I*jd10= = =0.3596*10d789.2I”=I*jd10Ij2=0.35969.16=3.2939kA S0.2=I*jd6Sj=0.35961
41、00=35.96MVAich=2.553.2939=8.3994kA Ich=1.523.2939=5.007kA11、d 11点（八采二层变电所 6KV 母线） 短路时的短路电流：17合成电抗：X *jd11=X*j34+X*j8+X*j13+X*j14=1.1093+1.2714+0.4002+0.8353=3.6162I*jd11= = =0.2765*1d62.3I”=I*jd11Ij2=0.27659.16=2.533kA S0.2=I*jd11Sj=0.2765100=27.65MVAich=2.552.533=6.4593kA Ich=1.522.533=3.8502kA12、d
42、 12点（三采配电点 6KV 母线）短路时的短路电流：合成电抗：X*jd12= X*j34+X*j8+X*j13+X*j14+X*j15=1.1093+1.2714+0.4002+0.8353+1.4317=5.0479I*jd12= = =0.1981*12d0479.5I”=I*jd12Ij2=0.19819.16=1.8146kA S0.2=I*jd12Sj=0.1981100=19.81MVAich=2.551.8146=4.6273kA Ich=1.521.8146=2.7582kA13、d 13点（九采移变电所 6KV 母线）短路时的短路电流：X*jd13= X*j34+X*j8+
43、X*j13+X*j14+X*j15+X*j16=1.1093+1.2714+0.4002+0.8353+1.4317+1.1449=6.4969I*jd13= = =0.1539*13d496.I”=I*jd13Ij2=0.15399.16=1.4099kA S0.2=I*jd13Sj=0.1539100=15.39MVAich=2.551.4099=3.5925kA Ich=1.521.4099=2.143kA15、d 15点（-580 水平扩排 6KV 母线）短路时的短路电流：合成电抗：X *jd15= X*j34+X*j18 =1.1093+1.4841=2.5934I*jd15= =
44、=0.3856*15d934.218I”=I*jd15Ij2=0.38569.16=3.532kA S0.2=I*jd15Sj=0.3856100=38.56MVAich=2.553.532=9.0067kA Ich=1.523.532=5.3687kA16、d 16点（上段钢缆机 6KV 母线）短路时的短路电流：合成电抗：X *jd16= X*j34+X*j19 =1.1093+0.0753=1.1846I*jd16= = =0.8442*16d84.I”=I*jd16Ij2=0.84429.16=7.7326kA S0.2=I*jd16Sj=0.8442100=84.42MVAich=2.
45、557.7326=19.718kA Ich=1.527.7326=11.7535kA17、d 17点（洗煤厂 6KV 母线）短路时的短路电流：合成电抗：X *jd17= X*j34+X*j20 =1.1093+0.2398=1.3491I*jd17= = =0.7412*17d349.I”=I*jd17Ij2=0.74129.16=6.7898kA S0.2=I*jd17Sj=0.7412100=74.12MVAich=2.556.7898=17.3134kA Ich=1.526.7898=10.3204kA18、d 18点（链条厂 6KV 母线）短路时的短路电流：合成电抗：X *jd18=
46、X*j34+X*j21 =1.1093+0.4605=1.5698I*jd18= = =0.637*18d569.I”=I*jd18Ij2=0.6379.16=5.8349kA S0.2=I*jd18Sj=0.637100=63.7MVAich=2.555.8349=14.88kA Ich=1.525.8349=8.869kA19、d 19点（良协配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd19= X*j34+X*j22 =1.1093+0.132=1.2413I*jd19= = =0.8056*19d243.19I”=I*jd19Ij2=0.80569.16=7.3794kA
47、 S0.2=I*jd19Sj=0.8056100=80.56MVAich=2.557.3794=18.8174kA Ich=1.527.3794=11.2166kA20、d 20点（医院配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd20= X*j34+X*j22+X*j23=1.1093+0.132+0.2907=1.532I*jd20= = =0.6527*201d53.I”=I*jd20Ij2=0.65279.16=5.9791kA S0.2=I*jd20Sj=0.6527100=65.27MVAich=2.555.9791=15.2467kA Ich=1.525.9791=
48、9.0882kA21、d 20点（西岭配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd21= X*j34+X*j22+X*j24=1.1093+0.132+1.5066=2.7479I*jd21= = =0.3639*21d749.I”=I*jd21Ij2=0.36399.16=3.3335kA S0.2=I*jd21Sj=0.3639100=36.39MVAich=2.553.3335=8.5003kA Ich=1.523.9791=5.0669kA22、d 22点（南岭配电所 6KV 母线）短路时的短路电流：合成电抗：X *jd22= X*j34+X*j22+X*j25=1.1093+0.132+0.3788=1.6201I*jd22= = =0.6172*21d60.I”=I*jd22Ij2=0.61729.16=5.654kA S0.2=I*jd22Sj=0.6172100=61.72MVAich=2.555.654=14.4176kA Ich=1.525.65
