正常工作时，10kv电缆线路的线路电流大概在什么范围？ 一般10kV配电线路末端的短路电流为多少？
\u4f9b\u7535\u5c4010kv\u7ebf\u8def\u7684\u7535\u6d41\u5927\u6982\u662f\u591a\u5c11\u554a10kV\u7ebf\u8def\u7684\u5141\u8bb8\u5bb9\u91cf\u7ea66MVA\uff0c\u8ba1\u7b97\u53ef\u77e5\u5176\u7ebf\u8def\u5141\u8bb8\u7535\u6d41\u5927\u7ea6340A\u3002\u8d1f\u8377\u8ba1\u7b97\u516c\u5f0f\uff1a\u529f\u7387=1.732\u4e58\u4ee510kv\u4e58\u4ee5\u7535\u6d41\u3002\u6839\u636e\u76f8\u5173\u89c4\u8303\uff08GB50293-1999\uff09\uff0c10KV\u7ebf\u8def\u8f6c\u63a5\u5bb9\u91cf\u5e94\u4e0d\u5927\u4e8e15000KVA\uff0c\u6309P=1.732 X U X I\u8ba1\u7b97\uff0cI=15000KVA/10KV 1.732=866A\u3002\u5176\u5b9e\u8be5\u5bb9\u91cf\u8fd8\u548c\u8d1f\u8377\u4fa7\u7528\u7535\u8d1f\u8377\u53ca10KV\u7ebf\u8def\u7684\u5bfc\u7ebf\u7ebf\u5f84\u6709\u5173\u3002
10kv\u7684\u9ad8\u538b\u7ebf\u8def\u6240\u5e26\u8d1f\u8377\u5bb9\u91cf\u4e3a3000kw\u81f35000kw\uff0c\u6839\u636e\u8d1f\u8377\u8ba1\u7b97\u516c\u5f0f\uff1a\u529f\u7387=1.732\u4e58\u4ee510kv\u4e58\u4ee5\u7535\u6d41\uff0c\u53ef\u5f97\u7535\u6d41\u5728173A\u81f3288A\u4e4b\u95f4\u3002\u800c\u4e1410KV\u7ebf\u8def\u8f6c\u63a5\u5bb9\u91cf\u5e94\u4e0d\u5927\u4e8e15000KVA\uff0c\u6309P=1.732 X U X I\u8ba1\u7b97\uff0cI=15000KVA/10KV 1.732=866A\u3002
\u6269\u5c55\u8d44\u6599\uff1a
10kV\u7684\u57ce\u533a\u5185\u9ad8\u538b\u914d\u7535\u7ebf\u8def\u5927\u591a\u6570\u91c7\u7528\u5e26\u6709\u7edd\u7f18\u5916\u76ae\u7684\u5bfc\u7ebf\uff0c\u4f46\u5373\u4f7f\u6709\u7edd\u7f18\u5916\u76ae\u4e5f\u9700\u8981\u7528\u4e00\u4e2a\u6216\u51e0\u4e2a\u74f7\u74f6\u6765\u5bf9\u7ebf\u6746\u6216\u94c1\u5854\u8fdb\u884c\u7edd\u7f18\u300235kV\u53ca\u4ee5\u4e0a\u7684\u9ad8\u538b\u8f93\u7535\u7ebf\u8def\u5219\u91c7\u7528\u5bfc\u7ebf,\u56e0\u7535\u538b\u7b49\u7ea7\u7684\u4e0d\u540c\u4f7f\u7528\u66f4\u591a\u7684\u74f7\u74f6\u8fdb\u884c\u7edd\u7f18\u3002
\u53ef\u4ee5\u901a\u8fc7\u89c2\u5bdf\u8eab\u8fb9\u7684\u7ebf\u8def\u5c31\u53ef\u4ee5\u76f4\u63a5\u770b\u51fa\u6765\u3002\u7531\u4e8e\u5404\u5730\u533a\u7684\u7b49\u7ea7\u4e0d\u540c\uff0c\u4e0d\u540c\u5730\u533a\u76f8\u540c\u7535\u538b\u7b49\u7ea7\u7684\u7ebf\u8def\u74f7\u74f6\u4e32\u4e2d\u74f7\u74f6\u7684\u4e2a\u6570\u4e5f\u6709\u4e0d\u540c\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u9ed4\u897f\u5357\u5dde\u4eba\u6c11\u653f\u5e9c\u7f51\u2014\u5174\u4e49\u4f9b\u7535\u5c402018\u5e74\u7b2c\u4e00\u627910kv\u7ebf\u8def\u53ca
\u8fd9\u672c\u8eab\u5c31\u4e0d\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4e8b\uff01
\u4f60\u65e2\u7136\u7528\u5230\u77ed\u8def\u7535\u6d41\u4e86\uff0c\u5c31\u80af\u5b9a\u4e0d\u662f\u521d\u4e2d\u9636\u6bb5\u7684\u8ba1\u7b97\u4e86\u5427
\u6240\u4ee5 \u4f60\u5c31\u4e0d\u7528\u627e\u7701\u52b2\u7684\u6cd5\u5b50\u4e86
\u5f53\u7136 \u4f60\u4e5f\u53ef\u4ee5\u627e\u4e2a\u8ba1\u7b97\u8f6f\u4ef6\u561b \u5c31\u4e0d\u7528\u81ea\u5df1\u8ba1\u7b97\u4e86
\u4f9b\u7535\u7f51\u7edc\u4e2d\u53d1\u751f\u77ed\u8def\u65f6,\u5f88\u5927\u7684\u77ed\u8def\u7535\u6d41\u4f1a\u4f7f\u7535\u5668\u8bbe\u5907\u8fc7\u70ed\u6216\u53d7\u7535\u52a8\u529b\u4f5c\u7528\u800c\u906d\u5230\u635f\u574f,\u540c\u65f6\u4f7f\u7f51\u7edc\u5185\u7684\u7535\u538b\u5927\u5927\u964d\u4f4e,\u56e0\u800c\u7834\u574f\u4e86\u7f51\u7edc\u5185\u7528\u7535\u8bbe\u5907\u7684\u6b63\u5e38\u5de5\u4f5c.\u4e3a\u4e86\u6d88\u9664\u6216\u51cf\u8f7b\u77ed\u8def\u7684\u540e\u679c,\u5c31\u9700\u8981\u8ba1\u7b97\u77ed\u8def\u7535\u6d41,\u4ee5\u6b63\u786e\u5730\u9009\u62e9\u7535\u5668\u8bbe\u5907\u3001\u8bbe\u8ba1\u7ee7\u7535\u4fdd\u62a4\u548c\u9009\u7528\u9650\u5236\u77ed\u8def\u7535\u6d41\u7684\u5143\u4ef6.
\u4e8c.\u8ba1\u7b97\u6761\u4ef6
1.\u5047\u8bbe\u7cfb\u7edf\u6709\u65e0\u9650\u5927\u7684\u5bb9\u91cf.\u7528\u6237\u5904\u77ed\u8def\u540e,\u7cfb\u7edf\u6bcd\u7ebf\u7535\u538b\u80fd\u7ef4\u6301\u4e0d\u53d8.\u5373\u8ba1\u7b97\u963b\u6297\u6bd4\u7cfb\u7edf\u963b\u6297\u8981\u5927\u5f97\u591a.
\u5177\u4f53\u89c4\u5b9a: \u5bf9\u4e8e3~35KV\u7ea7\u7535\u7f51\u4e2d\u77ed\u8def\u7535\u6d41\u7684\u8ba1\u7b97,\u53ef\u4ee5\u8ba4\u4e3a110KV\u53ca\u4ee5\u4e0a\u7684\u7cfb\u7edf\u7684\u5bb9\u91cf\u4e3a\u65e0\u9650\u5927.\u53ea\u8981\u8ba1\u7b9735KV\u53ca\u4ee5\u4e0b\u7f51\u7edc\u5143\u4ef6\u7684\u963b\u6297.
2.\u5728\u8ba1\u7b97\u9ad8\u538b\u7535\u5668\u4e2d\u7684\u77ed\u8def\u7535\u6d41\u65f6,\u53ea\u9700\u8003\u8651\u53d1\u7535\u673a\u3001\u53d8\u538b\u5668\u3001\u7535\u6297\u5668\u7684\u7535\u6297,\u800c\u5ffd\u7565\u5176\u7535\u963b;\u5bf9\u4e8e\u67b6\u7a7a\u7ebf\u548c\u7535\u7f06,\u53ea\u6709\u5f53\u5176\u7535\u963b\u5927\u4e8e\u7535\u62971/3\u65f6\u624d\u9700\u8ba1\u5165\u7535\u963b,\u4e00\u822c\u4e5f\u53ea\u8ba1\u7535\u6297\u800c\u5ffd\u7565\u7535\u963b.
3. \u77ed\u8def\u7535\u6d41\u8ba1\u7b97\u516c\u5f0f\u6216\u8ba1\u7b97\u56fe\u8868,\u90fd\u4ee5\u4e09\u76f8\u77ed\u8def\u4e3a\u8ba1\u7b97\u6761\u4ef6.\u56e0\u4e3a\u5355\u76f8\u77ed\u8def\u6216\u4e8c\u76f8\u77ed\u8def\u65f6\u7684\u77ed\u8def\u7535\u6d41\u90fd\u5c0f\u4e8e\u4e09\u76f8\u77ed\u8def\u7535\u6d41.\u80fd\u591f\u5206\u65ad\u4e09\u76f8\u77ed\u8def\u7535\u6d41\u7684\u7535\u5668,\u4e00\u5b9a\u80fd\u591f\u5206\u65ad\u5355\u76f8\u77ed\u8def\u7535\u6d41\u6216\u4e8c\u76f8\u77ed\u8def\u7535\u6d41.
\u4e09.\u7b80\u5316\u8ba1\u7b97\u6cd5
\u5373\u4f7f\u8bbe\u5b9a\u4e86\u4e00\u4e9b\u5047\u8bbe\u6761\u4ef6,\u8981\u6b63\u786e\u8ba1\u7b97\u77ed\u8def\u7535\u6d41\u8fd8\u662f\u5341\u5206\u56f0\u96be,\u5bf9\u4e8e\u4e00\u822c\u7528\u6237\u4e5f\u6ca1\u6709\u5fc5\u8981.\u4e00\u4e9b\u8bbe\u8ba1\u624b\u518c\u63d0\u4f9b\u4e86\u7b80\u5316\u8ba1\u7b97\u7684\u56fe\u8868.\u7701\u53bb\u4e86\u8ba1\u7b97\u7684\u9ebb\u70e6.\u7528\u8d77\u6765\u6bd4\u8f83\u65b9\u4fbf.\u4f46\u8981\u662f\u624b\u8fb9\u4e00\u65f6\u6ca1\u6709\u8bbe\u8ba1\u624b\u518c\u600e\u4e48\u529e?\u4e0b\u9762\u4ecb\u7ecd\u4e00\u79cd \u201c\u53e3\u8bc0\u5f0f\u201d\u7684\u8ba1\u7b97\u65b9\u6cd5,\u53ea\u8981\u8bb0\u72627\u53e5\u53e3\u8bc0,\u5c31\u53ef\u638c\u63e1\u77ed\u8def\u7535\u6d41\u8ba1\u7b97\u65b9\u6cd5.
\u5728\u4ecb\u7ecd\u7b80\u5316\u8ba1\u7b97\u6cd5\u4e4b\u524d\u5fc5\u987b\u5148\u4e86\u89e3\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5.
1.\u4e3b\u8981\u53c2\u6570
Sd\u4e09\u76f8\u77ed\u8def\u5bb9\u91cf (MVA)\u7b80\u79f0\u77ed\u8def\u5bb9\u91cf\u6821\u6838\u5f00\u5173\u5206\u65ad\u5bb9\u91cf
Id\u4e09\u76f8\u77ed\u8def\u7535\u6d41\u5468\u671f\u5206\u91cf\u6709\u6548\u503c(KA)\u7b80\u79f0\u77ed\u8def\u7535\u6d41\u6821\u6838\u5f00\u5173\u5206\u65ad\u7535\u6d41
\u548c\u70ed\u7a33\u5b9a
IC\u4e09\u76f8\u77ed\u8def\u7b2c\u4e00\u5468\u671f\u5168\u7535\u6d41\u6709\u6548\u503c(KA) \u7b80\u79f0\u51b2\u51fb\u7535\u6d41\u6709\u6548\u503c\u6821\u6838\u52a8\u7a33\u5b9a
ic\u4e09\u76f8\u77ed\u8def\u7b2c\u4e00\u5468\u671f\u5168\u7535\u6d41\u5cf0\u503c(KA) \u7b80\u79f0\u51b2\u51fb\u7535\u6d41\u5cf0\u503c\u6821\u6838\u52a8\u7a33\u5b9a
x\u7535\u6297(\u03a9)
\u5176\u4e2d\u7cfb\u7edf\u77ed\u8def\u5bb9\u91cfSd\u548c\u8ba1\u7b97\u70b9\u7535\u6297x \u662f\u5173\u952e.
2.\u6807\u4e48\u503c
\u8ba1\u7b97\u65f6\u9009\u5b9a\u4e00\u4e2a\u57fa\u51c6\u5bb9\u91cf(Sjz)\u548c\u57fa\u51c6\u7535\u538b(Ujz).\u5c06\u77ed\u8def\u8ba1\u7b97\u4e2d\u5404\u4e2a\u53c2\u6570\u90fd\u8f6c\u5316\u4e3a\u548c\u8be5\u53c2\u6570\u7684\u57fa\u51c6\u91cf\u7684\u6bd4\u503c(\u76f8\u5bf9\u4e8e\u57fa\u51c6\u91cf\u7684\u6bd4\u503c),\u79f0\u4e3a\u6807\u4e48\u503c(\u8fd9\u662f\u77ed\u8def\u7535\u6d41\u8ba1\u7b97\u6700\u7279\u522b\u7684\u5730\u65b9,\u76ee\u7684\u662f\u8981\u7b80\u5316\u8ba1\u7b97).
(1)\u57fa\u51c6
\u57fa\u51c6\u5bb9\u91cf Sjz =100 MVA
\u57fa\u51c6\u7535\u538b UJZ\u89c4\u5b9a\u4e3a8\u7ea7. 230, 115, 37, 10.5, 6.3, 3.15 ,0.4, 0.23 KV
\u6709\u4e86\u4ee5\u4e0a\u4e24\u9879,\u5404\u7ea7\u7535\u538b\u7684\u57fa\u51c6\u7535\u6d41\u5373\u53ef\u8ba1\u7b97\u51fa,\u4f8b: UJZ (KV)3710.56.30.4
\u56e0\u4e3a S=1.73*U*I \u6240\u4ee5 IJZ (KA)1.565.59.16144
(2)\u6807\u4e48\u503c\u8ba1\u7b97
\u5bb9\u91cf\u6807\u4e48\u503c S* =S/SJZ.\u4f8b\u5982:\u5f5310KV\u6bcd\u7ebf\u4e0a\u77ed\u8def\u5bb9\u91cf\u4e3a200 MVA\u65f6,\u5176\u6807\u4e48\u503c\u5bb9\u91cf
S* = 200/100=2.
\u7535\u538b\u6807\u4e48\u503c U*= U/UJZ ; \u7535\u6d41\u6807\u4e48\u503c I* =I/IJZ
3\u65e0\u9650\u5927\u5bb9\u91cf\u7cfb\u7edf\u4e09\u76f8\u77ed\u8def\u7535\u6d41\u8ba1\u7b97\u516c\u5f0f
\u77ed\u8def\u7535\u6d41\u6807\u4e48\u503c: I*d = 1/x* (\u603b\u7535\u6297\u6807\u4e48\u503c\u7684\u5012\u6570).
\u77ed\u8def\u7535\u6d41\u6709\u6548\u503c: Id= IJZ* I*d=IJZ/ x*(KA)
\u51b2\u51fb\u7535\u6d41\u6709\u6548\u503c: IC = Id *\u221a1+2 (KC-1)2 (KA)\u5176\u4e2dKC\u51b2\u51fb\u7cfb\u6570,\u53d61.8
\u6240\u4ee5 IC =1.52Id
\u51b2\u51fb\u7535\u6d41\u5cf0\u503c: ic =1.41* Id*KC=2.55 Id (KA)
\u5f531000KVA\u53ca\u4ee5\u4e0b\u53d8\u538b\u5668\u4e8c\u6b21\u4fa7\u77ed\u8def\u65f6,\u51b2\u51fb\u7cfb\u6570KC ,\u53d61.3
\u8fd9\u65f6:\u51b2\u51fb\u7535\u6d41\u6709\u6548\u503cIC =1.09*Id(KA)
\u51b2\u51fb\u7535\u6d41\u5cf0\u503c: ic =1.84 Id(KA)
\u638c\u63e1\u4e86\u4ee5\u4e0a\u77e5\u8bc6,\u5c31\u80fd\u8fdb\u884c\u77ed\u8def\u7535\u6d41\u8ba1\u7b97\u4e86.\u516c\u5f0f\u4e0d\u591a,\u53c8\u7b80\u5355.\u4f46\u95ee\u9898\u5728\u4e8e\u77ed\u8def\u70b9\u7684\u603b\u7535\u6297\u5982\u4f55\u5f97\u5230?\u4f8b\u5982:\u533a\u57df\u53d8\u7535\u6240\u53d8\u538b\u5668\u7684\u7535\u6297\u3001\u8f93\u7535\u7ebf\u8def\u7684\u7535\u6297\u3001\u4f01\u4e1a\u53d8\u7535\u6240\u53d8\u538b\u5668\u7684\u7535\u6297,\u7b49\u7b49.
\u4e00\u79cd\u65b9\u6cd5\u662f\u67e5\u6709\u5173\u8bbe\u8ba1\u624b\u518c,\u4ece\u4e2d\u53ef\u4ee5\u627e\u5230\u5e38\u7528\u53d8\u538b\u5668\u3001\u8f93\u7535\u7ebf\u8def\u53ca\u7535\u6297\u5668\u7684\u7535\u6297\u6807\u4e48\u503c.\u6c42\u5f97\u603b\u7535\u6297\u540e,\u518d\u7528\u4ee5\u4e0a\u516c\u5f0f\u8ba1\u7b97\u77ed\u8def\u7535\u6d41; \u8bbe\u8ba1\u624b\u518c\u4e2d\u8fd8\u6709\u4e00\u4e9b\u56fe\u8868,\u53ef\u4ee5\u76f4\u63a5\u67e5\u51fa\u77ed\u8def\u7535\u6d41.
\u4e0b\u9762\u4ecb\u7ecd\u4e00\u79cd \u201c\u53e3\u8bc0\u5f0f\u201d\u7684\u8ba1\u7b97\u65b9\u6cd5,\u53ea\u8981\u8bb0\u72627\u53e5\u53e3\u8bc0,\u5c31\u53ef\u638c\u63e1\u77ed\u8def\u7535\u6d41\u8ba1\u7b97\u65b9\u6cd5.
4\uff0e\u7b80\u5316\u7b97\u6cd5
\u30101\u3011\u7cfb\u7edf\u7535\u6297\u7684\u8ba1\u7b97
\u7cfb\u7edf\u7535\u6297\uff0c\u767e\u5146\u4e3a\u4e00\u3002\u5bb9\u91cf\u589e\u51cf\uff0c\u7535\u6297\u53cd\u6bd4\u3002100\u9664\u7cfb\u7edf\u5bb9\u91cf
\u4f8b\uff1a\u57fa\u51c6\u5bb9\u91cf 100MVA\u3002\u5f53\u7cfb\u7edf\u5bb9\u91cf\u4e3a100MVA\u65f6\uff0c\u7cfb\u7edf\u7684\u7535\u6297\u4e3aXS*=100/100\uff1d1
\u5f53\u7cfb\u7edf\u5bb9\u91cf\u4e3a200MVA\u65f6\uff0c\u7cfb\u7edf\u7684\u7535\u6297\u4e3aXS*=100/200\uff1d0.5
\u5f53\u7cfb\u7edf\u5bb9\u91cf\u4e3a\u65e0\u7a77\u5927\u65f6\uff0c\u7cfb\u7edf\u7684\u7535\u6297\u4e3aXS*=100/\u221e\uff1d0
\u7cfb\u7edf\u5bb9\u91cf\u5355\u4f4d\uff1aMVA
\u7cfb\u7edf\u5bb9\u91cf\u5e94\u7531\u5f53\u5730\u4f9b\u7535\u90e8\u95e8\u63d0\u4f9b\u3002\u5f53\u4e0d\u80fd\u5f97\u5230\u65f6\uff0c\u53ef\u5c06\u4f9b\u7535\u7535\u6e90\u51fa\u7ebf\u5f00\u5173\u7684\u5f00\u65ad\u5bb9\u91cf
\u4f5c\u4e3a\u7cfb\u7edf\u5bb9\u91cf\u3002\u5982\u5df2\u77e5\u4f9b\u7535\u90e8\u95e8\u51fa\u7ebf\u5f00\u5173\u4e3aW-VAC 12KV 2000A \u989d\u5b9a\u5206\u65ad\u7535\u6d41\u4e3a40KA\u3002\u5219\u53ef\u8ba4\u4e3a\u7cfb\u7edf\u5bb9\u91cfS=1.73*40*10000V=692MVA, \u7cfb\u7edf\u7684\u7535\u6297\u4e3aXS*=100/692\uff1d0.144\u3002
\u30102\u3011\u53d8\u538b\u5668\u7535\u6297\u7684\u8ba1\u7b97
110KV, 10.5\u9664\u53d8\u538b\u5668\u5bb9\u91cf\uff1b35KV, 7\u9664\u53d8\u538b\u5668\u5bb9\u91cf\uff1b10KV{6KV}, 4.5\u9664\u53d8\u538b\u5668\u5bb9\u91cf\u3002
\u4f8b\uff1a\u4e00\u53f035KV 3200KVA\u53d8\u538b\u5668\u7684\u7535\u6297X*=7/3.2=2.1875
\u4e00\u53f010KV 1600KVA\u53d8\u538b\u5668\u7684\u7535\u6297X*=4.5/1.6=2.813
\u53d8\u538b\u5668\u5bb9\u91cf\u5355\u4f4d\uff1aMVA
\u8fd9\u91cc\u7684\u7cfb\u657010.5\uff0c7\uff0c4.5 \u5b9e\u9645\u4e0a\u5c31\u662f\u53d8\u538b\u5668\u77ed\u8def\u7535\u6297\u7684\uff05\u6570\u3002\u4e0d\u540c\u7535\u538b\u7b49\u7ea7\u6709\u4e0d\u540c\u7684\u503c\u3002
\u30103\u3011\u7535\u6297\u5668\u7535\u6297\u7684\u8ba1\u7b97
\u7535\u6297\u5668\u7684\u989d\u5b9a\u7535\u6297\u9664\u989d\u5b9a\u5bb9\u91cf\u518d\u6253\u4e5d\u6298\u3002
\u4f8b\uff1a\u6709\u4e00\u7535\u6297\u5668 U=6KV I=0.3KA \u989d\u5b9a\u7535\u6297 X=4% \u3002
\u989d\u5b9a\u5bb9\u91cf S=1.73*6*0.3=3.12 MVA. \u7535\u6297\u5668\u7535\u6297X*={4/3.12}*0.9=1.15
\u7535\u6297\u5668\u5bb9\u91cf\u5355\u4f4d\uff1aMVA
\u30104\u3011\u67b6\u7a7a\u7ebf\u8def\u53ca\u7535\u7f06\u7535\u6297\u7684\u8ba1\u7b97
\u67b6\u7a7a\u7ebf\uff1a6KV\uff0c\u7b49\u4e8e\u516c\u91cc\u6570\uff1b10KV\uff0c\u53d61/3\uff1b35KV\uff0c\u53d6 3\uff050
\u7535\u7f06\uff1a\u6309\u67b6\u7a7a\u7ebf\u518d\u4e580.2\u3002
\u4f8b\uff1a10KV 6KM\u67b6\u7a7a\u7ebf\u3002\u67b6\u7a7a\u7ebf\u8def\u7535\u6297X*=6/3=2
10KV 0.2KM\u7535\u7f06\u3002\u7535\u7f06\u7535\u6297X*={0.2/3}*0.2=0.013\u3002
\u8fd9\u91cc\u4f5c\u4e86\u7b80\u5316\uff0c\u5b9e\u9645\u4e0a\u67b6\u7a7a\u7ebf\u8def\u53ca\u7535\u7f06\u7684\u7535\u6297\u548c\u5176\u622a\u9762\u6709\u5173\uff0c\u622a\u9762\u8d8a\u5927\u7535\u6297\u8d8a\u5c0f\u3002
\u30105\u3011\u77ed\u8def\u5bb9\u91cf\u7684\u8ba1\u7b97
\u7535\u6297\u52a0\u5b9a\uff0c\u53bb\u9664100\u3002
\u4f8b\uff1a\u5df2\u77e5\u77ed\u8def\u70b9\u524d\u5404\u5143\u4ef6\u7535\u6297\u6807\u4e48\u503c\u4e4b\u548c\u4e3a X*\u2211=2, \u5219\u77ed\u8def\u70b9\u7684\u77ed\u8def\u5bb9\u91cf
Sd=100/2=50 MVA\u3002
\u77ed\u8def\u5bb9\u91cf\u5355\u4f4d\uff1aMVA
\u30106\u3011\u77ed\u8def\u7535\u6d41\u7684\u8ba1\u7b97
6KV\uff0c9.2\u9664\u7535\u6297\uff1b10KV\uff0c5.5\u9664\u7535\u6297; 35KV\uff0c1.6\u9664\u7535\u6297; 110KV\uff0c0.5\u9664\u7535\u6297\u3002
0.4KV\uff0c150\u9664\u7535\u6297
\u4f8b\uff1a\u5df2\u77e5\u4e00\u77ed\u8def\u70b9\u524d\u5404\u5143\u4ef6\u7535\u6297\u6807\u4e48\u503c\u4e4b\u548c\u4e3a X*\u2211=2, \u77ed\u8def\u70b9\u7535\u538b\u7b49\u7ea7\u4e3a6KV,
\u5219\u77ed\u8def\u70b9\u7684\u77ed\u8def\u7535\u6d41 Id=9.2/2=4.6KA\u3002
\u77ed\u8def\u7535\u6d41\u5355\u4f4d\uff1aKA
\u30107\u3011\u77ed\u8def\u51b2\u51fb\u7535\u6d41\u7684\u8ba1\u7b97
1000KVA\u53ca\u4ee5\u4e0b\u53d8\u538b\u5668\u4e8c\u6b21\u4fa7\u77ed\u8def\u65f6\uff1a\u51b2\u51fb\u7535\u6d41\u6709\u6548\u503cIc=Id, \u51b2\u51fb\u7535\u6d41\u5cf0\u503cic=1.8Id
1000KVA\u4ee5\u4e0a\u53d8\u538b\u5668\u4e8c\u6b21\u4fa7\u77ed\u8def\u65f6\uff1a\u51b2\u51fb\u7535\u6d41\u6709\u6548\u503cIc=1.5Id, \u51b2\u51fb\u7535\u6d41\u5cf0\u503cic=2.5Id
\u4f8b\uff1a\u5df2\u77e5\u77ed\u8def\u70b9{1600KVA\u53d8\u538b\u5668\u4e8c\u6b21\u4fa7}\u7684\u77ed\u8def\u7535\u6d41 Id=4.6KA\uff0c
\u5219\u8be5\u70b9\u51b2\u51fb\u7535\u6d41\u6709\u6548\u503cIc=1.5Id,\uff1d1.5*4.6\uff1d7.36KA,\u51b2\u51fb\u7535\u6d41\u5cf0\u503cic=2.5Id=2.5*406=11.5KA\u3002
\u53ef\u89c1\u77ed\u8def\u7535\u6d41\u8ba1\u7b97\u7684\u5173\u952e\u662f\u7b97\u51fa\u77ed\u8def\u70b9\u524d\u7684\u603b\u7535\u6297{\u6807\u4e48\u503c}.\u4f46\u4e00\u5b9a\u8981\u5305\u62ec\u7cfb\u7edf\u7535\u6297
三相电流计算方式是功率除以电压除以根号三除以功率因数
比如带的负载是1000KVA，电压10KV，功率因数0.9，则其电流就是1000÷10÷1.732÷0.8=72.2A
这要看负荷的 大小和线路的导线截面。
这个主要是根据你变压器带载情况而定的，光看高压电路是看不出来的
这个主要是根据你变压器带载情况而定的,光看高压电路是看不出来的.
绛旓細姣斿甯︾殑璐熻浇鏄1000KVA锛岀數鍘10KV锛屽姛鐜囧洜鏁0.9锛屽垯鍏剁數娴佸氨鏄1000梅10梅1.732梅0.8=72.2A
绛旓細瀵逛簬10kV绾胯矾锛屽叾缁濈紭鐢甸樆鍊奸渶瑕佺鍚堝浗瀹剁殑鐩稿叧鏍囧噯鍜岃瀹氥傛牴鎹垜鍥界數鍔涜涓氱殑鏍囧噯锛10kV绾胯矾鐨缁濈紭鐢甸樆搴旇婊¤冻涓嬪垪瑕佹眰锛1. 灞忚斀鐢电紗锛氬睆钄界數缂嗙殑缁濈紭鐢甸樆搴斾笉浣庝簬5000鍏嗘銆2. 鏅氱數缂嗭細鏅氱數缂嗙殑缁濈紭鐢甸樆搴斾笉浣庝簬1500鍏嗘銆3. 绌烘皵缁濈紭绾胯矾锛氬湪骞茬嚗鐜鏉′欢涓嬶紝鐩搁棿缁濈紭鐢甸樆搴斾笉浣庝簬100鍏嗘•...
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绛旓細10KV楂樺帇鐢电紗缁濈紭鐢甸樆涓嶅緱浣庝簬5M惟銆傜粷缂樼數闃讳负鐢垫皵璁惧鍜岀數姘旂嚎璺渶鍩烘湰鐨勭粷缂樻寚鏍囥傚浜庝綆鍘嬬數姘旇缃殑浜ゆ帴璇曢獙锛屽父娓╀笅鐢靛姩鏈恒侀厤鐢佃澶囧拰閰嶇數绾胯矾鐨缁濈紭鐢甸樆涓嶅簲浣庝簬0.5M惟(瀵逛簬杩愯涓殑璁惧鍜岀嚎璺紝缁濈紭鐢甸樆涓嶅簲浣庝簬1M惟/kV)銆備綆鍘嬬數鍣ㄥ強鍏惰繛鎺ョ數缂嗗拰浜屾鍥炶矾鐨勭粷缂樼數闃讳竴鑸笉搴斾綆浜1M惟锛涘湪姣旇緝娼箍...
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绛旓細1. 鐢电紗鐨鑰愬帇璇曢獙閫氬父浼氳秴杩囧叾宸ヤ綔鐢靛帇锛岀洰鐨勬槸涓轰簡妫娴嬬數缂嗗湪鏋佺鏉′欢涓嬬殑鑰愬彈鑳藉姏銆傝繖绉嶆祴璇曞線寰鏄牬鍧忔х殑锛屽洜涓哄畠鏂藉姞鐨勭數鍘嬮珮浜鐢电紗姝ｅ父杩愯鏃舵墍鎵垮彈鐨勭數鍘嬨2. 铏界劧鑰愬帇瀹為獙鏄娴嬬數缂嗗彲闈犳х殑閲嶈鎵嬫锛屼絾瀹冧篃鍙兘瀵圭數缂嗛犳垚涓瀹氱殑鎹熶激銆備緥濡傦紝鍦ㄨ愬帇瀹為獙涓锛岀數缂鍙兘浼氬洜涓虹數鍘嬭繃楂樿岀垎澶达紝鑰屽湪姝ｅ父...
绛旓細1銆姝ｅ父杩愯鐨10kV鐢靛姏鐢电紗锛鏍规嵁銆婄數姘旇澶囬闃叉ц瘯楠岃绋嬨嬬殑瑙勫畾锛屾槸1-3骞磋瘯楠屼竴娆★紱2銆佸仠鐢ㄤ竴娈垫椂闂寸殑鐢电紗锛屽湪鎶曞叆鏃惰杩涜缁濈紭璇曢獙銆3銆佸繀瑕佹椂锛涜繖涓緢寰锛岃濂藉ソ鐞嗚В鍏朵腑鐨勫惈涔夈
绛旓細10KV楂樺帇鐢电紗闇瑕5鍏噷鐨勮窛绂伙紝鍒版湯绔細鏈夌數鍘嬮檷銆傚嚒鏄緭鐢电嚎璺兘浼氭湁鐢靛帇鎹熷け锛岀數鍘嬫崯澶卞氨鏄數鍘嬮檷銆傚嚒鏄緭鐢绾胯矾鐨瀵肩嚎閮芥槸鏈夌數闃诲肩殑锛岃緭鐢电嚎璺腑鐨勭數娴佷笌绾胯矾鐢甸樆鐨勪箻绉氨鏄數鍘嬮檷銆傚綋鐢靛姏鐢电紗浼犺緭璺濈杈冭繙鏃讹紝渚嬪900m锛屽氨搴旇冭檻鐢电紗鐢靛帇鐨勨滃帇闄嶁濋棶棰橈紝鍚﹀垯鐢电紗閲囪喘銆佸畨瑁呬互鍚庢柟鎵嶅彂瑙夊洜鏈冭檻鍘嬮檷...
绛旓細鍦ㄦ灦绌哄嚭绾垮洖璺垨鏈夊弽棣堝彲鑳界殑鐢电紗鍑虹嚎鍥炶矾涓紝搴旇璁绾胯矾闅旂寮鍏炽6.閲囩敤10kV鎴6kV鐔旀柇鍣ㄨ礋鑽峰紑鍏冲浐瀹氬紡閰嶇數瑁呯疆鏃讹紝搴斿湪鐢垫簮渚ц璁鹃殧绂诲紑鍏炽7.鎺ュ湪姣嶇嚎涓婄殑閬块浄鍣ㄥ拰鐢靛帇浜掓劅鍣,瀹滃悎鐢ㄤ竴缁勯殧绂诲紑鍏炽8.鍙樺帇鍣ㄤ簩娆′晶鐢靛帇涓6kV鎴3kV鐨勬诲紑鍏筹紝鍙噰鐢ㄩ殧绂诲紑鍏虫垨闅旂瑙﹀ご銆
绛旓細鏋剁┖绾胯秴杩50鍏噷 鐢电紗瓒呰繃5鍏噷 搴旇璁炬秷寮х嚎鍦
