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<\/h1>\n<\/h1>\nTrong m\u1ecdi h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi, vi\u1ec7c l\u1ef1a ch\u1ecdn ti\u1ebft di\u1ec7n d\u00e2y c\u00e1p<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n, hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a h\u1ec7 th\u1ed1ng<\/strong>.<\/p>\n N\u1ebfu d\u00e2y c\u00e1p qu\u00e1 nh\u1ecf, \u0111i\u1ec7n \u00e1p s\u1ebd b\u1ecb s\u1ee5t gi\u1ea3m, d\u00e2y d\u1eabn n\u00f3ng l\u00ean v\u00e0 g\u00e2y t\u1ed5n hao n\u0103ng l\u01b0\u1ee3ng. Ng\u01b0\u1ee3c l\u1ea1i, l\u1ef1a ch\u1ecdn \u0111\u00fang k\u00edch th\u01b0\u1edbc c\u00e1p s\u1ebd gi\u00fap gi\u1ea3m t\u1ed5n th\u1ea5t \u0111i\u1ec7n n\u0103ng, t\u0103ng hi\u1ec7u su\u1ea5t truy\u1ec1n t\u1ea3i v\u00e0 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh trong nhi\u1ec1u n\u0103m.<\/p>\n B\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch t\u00ednh ti\u1ebft di\u1ec7n d\u00e2y \u0111i\u1ec7n<\/strong>, gi\u1ea3i th\u00edch hi\u1ec7n t\u01b0\u1ee3ng s\u1ee5t \u00e1p, gi\u1edbi thi\u1ec7u c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n v\u00e0 chia s\u1ebb nh\u1eefng kinh nghi\u1ec7m th\u1ef1c t\u1ebf khi thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi.<\/p>\n D\u00e2y d\u1eabn kh\u00f4ng ch\u1ec9 c\u00f3 nhi\u1ec7m v\u1ee5 truy\u1ec1n t\u1ea3i \u0111i\u1ec7n m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn:<\/p>\n N\u1ebfu s\u1eed d\u1ee5ng d\u00e2y qu\u00e1 nh\u1ecf c\u00f3 th\u1ec3 g\u00e2y:<\/p>\n M\u1ecdi d\u00e2y d\u1eabn \u0111i\u1ec7n \u0111\u1ec1u c\u00f3 \u0111i\u1ec7n tr\u1edf.<\/p>\n Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y, m\u1ed9t ph\u1ea7n \u0111i\u1ec7n \u00e1p s\u1ebd b\u1ecb m\u1ea5t do \u0111i\u1ec7n tr\u1edf n\u00e0y.<\/p>\n Hi\u1ec7n t\u01b0\u1ee3ng \u0111\u00f3 g\u1ecdi l\u00e0 Voltage Drop (S\u1ee5t \u00e1p).<\/strong><\/p>\n V\u00ed d\u1ee5:<\/p>\n M\u1ed9t b\u1ed9 pin 12V<\/strong> truy\u1ec1n \u0111i\u1ec7n \u0111\u1ebfn b\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ea1c.<\/p>\n N\u1ebfu \u0111i\u1ec7n \u00e1p t\u1ea1i battery l\u00e0:<\/p>\n 12V<\/strong><\/p>\n<\/blockquote>\n Nh\u01b0ng t\u1ea1i b\u1ed9 s\u1ea1c ch\u1ec9 c\u00f2n:<\/p>\n 11,5V<\/strong><\/p>\n<\/blockquote>\n Th\u00ec 0,5V<\/strong> \u0111\u00e3 b\u1ecb m\u1ea5t tr\u00ean d\u00e2y d\u1eabn.<\/p>\n Trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi c\u00f3 d\u00f2ng \u0111i\u1ec7n l\u1edbn, ch\u1ec9 v\u00e0i ph\u1ea7n tr\u0103m s\u1ee5t \u00e1p c\u0169ng c\u00f3 th\u1ec3 g\u00e2y t\u1ed5n th\u1ea5t \u0111\u00e1ng k\u1ec3 v\u00e0 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t s\u1ea1c.<\/p>\n Theo kinh nghi\u1ec7m thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng PV, m\u1ee9c s\u1ee5t \u00e1p n\u00ean \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n nh\u01b0 sau:<\/p>\n Gi\u1eef s\u1ee5t \u00e1p \u1edf m\u1ee9c th\u1ea5p kh\u00f4ng ch\u1ec9 t\u0103ng hi\u1ec7u su\u1ea5t m\u00e0 c\u00f2n gi\u00fap gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 d\u00e2y d\u1eabn, k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd l\u1edbp c\u00e1ch \u0111i\u1ec7n.<\/p>\n Ti\u1ebft di\u1ec7n d\u00e2y \u0111\u01b0\u1ee3c t\u00ednh theo \u0111\u1ecbnh lu\u1eadt Ohm:<\/p>\n Ti\u1ebft di\u1ec7n (mm\u00b2) = (2 \u00d7 L \u00d7 I \u00d7 \u03c1) \u00f7 \u0394V<\/strong><\/p>\n Trong \u0111\u00f3:<\/p>\n Trong \u0111\u00f3:<\/p>\n \u0394V = \u0110i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng \u00d7 % s\u1ee5t \u00e1p cho ph\u00e9p<\/strong><\/p>\n K\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c l\u00e0 ti\u1ebft di\u1ec7n t\u1ed1i thi\u1ec3u (mm\u00b2). Khi thi c\u00f4ng, n\u00ean ch\u1ecdn k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n l\u1edbn h\u01a1n g\u1ea7n nh\u1ea5t<\/strong> \u0111\u1ec3 t\u0103ng \u0111\u1ed9 an to\u00e0n v\u00e0 gi\u1ea3m t\u1ed5n th\u1ea5t.<\/p>\n \u0110\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn nh\u1ea5t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi nh\u1edd:<\/p>\n Ph\u00f9 h\u1ee3p v\u1edbi h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng d\u00e2n d\u1ee5ng v\u00e0 th\u01b0\u01a1ng m\u1ea1i.<\/p>\n \u01afu \u0111i\u1ec3m:<\/p>\n Tuy nhi\u00ean:<\/p>\n Do \u0111\u00f3, khi s\u1eed d\u1ee5ng c\u00e1p nh\u00f4m c\u1ea7n t\u0103ng ti\u1ebft di\u1ec7n kho\u1ea3ng:<\/p>\n Ti\u1ebft di\u1ec7n nh\u00f4m \u2248 1,6 \u00d7 ti\u1ebft di\u1ec7n c\u00e1p \u0111\u1ed3ng<\/strong><\/p>\n<\/blockquote>\n Chi\u1ec1u d\u00e0i d\u00e2y c\u00e0ng l\u1edbn th\u00ec:<\/p>\n V\u00ed d\u1ee5:<\/p>\n H\u1ec7 th\u1ed1ng:<\/p>\n C\u00f3 th\u1ec3 c\u1ea7n d\u00e2y:<\/p>\n 16 mm\u00b2<\/strong><\/p>\n<\/blockquote>\n N\u1ebfu c\u00f9ng c\u00f4ng su\u1ea5t nh\u01b0ng chuy\u1ec3n sang h\u1ec7:<\/p>\n 48V<\/strong><\/p>\n D\u00f2ng \u0111i\u1ec7n ch\u1ec9 c\u00f2n:<\/p>\n 7,5A<\/strong><\/p>\n<\/blockquote>\n L\u00fac n\u00e0y ch\u1ec9 c\u1ea7n kho\u1ea3ng:<\/p>\n 4 mm\u00b2<\/strong><\/p>\n<\/blockquote>\n \u0110\u00e2y l\u00e0 l\u00fd do c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi c\u00f4ng su\u1ea5t l\u1edbn th\u01b0\u1eddng s\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p 24V<\/strong>, 48V<\/strong> ho\u1eb7c cao h\u01a1n \u0111\u1ec3 gi\u1ea3m d\u00f2ng \u0111i\u1ec7n v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed d\u00e2y d\u1eabn.<\/p>\n B\u1ea3ng tr\u00ean gi\u00fap quy \u0111\u1ed5i nhanh gi\u1eefa h\u1ec7 \u0111o AWG<\/strong> v\u00e0 mm\u00b2<\/strong>, \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch khi l\u1ef1a ch\u1ecdn c\u00e1p theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf.<\/p>\n Th\u00f4ng s\u1ed1 ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 trong \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n:<\/p>\n Trong th\u1ef1c t\u1ebf, n\u1ebfu d\u00e2y:<\/p>\n th\u00ec kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i s\u1ebd gi\u1ea3m.<\/p>\n Khi \u0111\u00f3 c\u1ea7n \u00e1p d\u1ee5ng h\u1ec7 s\u1ed1 hi\u1ec7u ch\u1ec9nh (Derating Factor)<\/strong> theo h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n.<\/p>\n \u0110\u1ec3 h\u1ec7 th\u1ed1ng v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ec1n b\u1ec9, b\u1ea1n n\u00ean:<\/p>\n V\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 d\u00f2ng \u0111i\u1ec7n r\u1ea5t l\u1edbn, vi\u1ec7c s\u1eed d\u1ee5ng m\u1ed9t s\u1ee3i c\u00e1p c\u00f3 ti\u1ebft di\u1ec7n qu\u00e1 l\u1edbn s\u1ebd:<\/p>\n Gi\u1ea3i ph\u00e1p l\u00e0 s\u1eed d\u1ee5ng hai ho\u1eb7c nhi\u1ec1u d\u00e2y song song<\/strong> c\u00f3 c\u00f9ng ti\u1ebft di\u1ec7n.<\/p>\n V\u00ed d\u1ee5:<\/p>\n Khi \u00e1p d\u1ee5ng ph\u01b0\u01a1ng \u00e1n n\u00e0y c\u1ea7n \u0111\u1ea3m b\u1ea3o:<\/p>\n \u0110i\u1ec1u n\u00e0y gi\u00fap d\u00f2ng \u0111i\u1ec7n ph\u00e2n b\u1ed1 \u0111\u1ec1u gi\u1eefa c\u00e1c d\u00e2y, tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 t\u1ea3i c\u1ee5c b\u1ed9.<\/p>\n Gi\u1ea3 s\u1eed b\u1ea1n c\u00f3 h\u1ec7 th\u1ed1ng:<\/p>\n \u0110i\u1ec7n \u00e1p s\u1ee5t cho ph\u00e9p:<\/p>\n \u0394V = 48 \u00d7 2% = 0,96V<\/strong><\/p>\n<\/blockquote>\n \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh ti\u1ebft di\u1ec7n s\u1ebd thu \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb kho\u1ea3ng 26 mm\u00b2<\/strong>. Khi l\u1ef1a ch\u1ecdn th\u1ef1c t\u1ebf, n\u00ean d\u00f9ng c\u00e1p 35 mm\u00b2<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1ef1 ph\u00f2ng, gi\u1ea3m t\u1ed5n th\u1ea5t v\u00e0 h\u1ea1n ch\u1ebf t\u0103ng nhi\u1ec7t khi t\u1ea3i l\u1edbn ho\u1eb7c m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n
\nV\u00ec Sao Ph\u1ea3i Ch\u1ecdn \u0110\u00fang Ti\u1ebft Di\u1ec7n D\u00e2y \u0110i\u1ec7n?<\/h1>\n
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\nS\u1ee5t \u00c1p (Voltage Drop) L\u00e0 G\u00ec?<\/h1>\n
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\nM\u1ee9c S\u1ee5t \u00c1p Khuy\u1ebfn Ngh\u1ecb<\/h1>\n
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\n \nLo\u1ea1i \u0111\u01b0\u1eddng d\u00e2y<\/th>\n S\u1ee5t \u00e1p khuy\u1ebfn ngh\u1ecb<\/th>\n<\/tr>\n<\/thead>\n \n D\u00e2y Battery \u2192 Inverter<\/td>\n 2\u20133%<\/strong><\/td>\n<\/tr>\n \n D\u00e2y PV \u2192 Charge Controller<\/td>\n 2\u20133%<\/strong><\/td>\n<\/tr>\n \n D\u00e2y c\u1ea5p cho t\u1ea3i DC<\/td>\n 3\u20135%<\/strong><\/td>\n<\/tr>\n \n \u0110\u01b0\u1eddng d\u00e2y d\u00e0i c\u1ea7n hi\u1ec7u su\u1ea5t cao<\/td>\n 1\u20132%<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\nC\u00f4ng Th\u1ee9c T\u00ednh Ti\u1ebft Di\u1ec7n D\u00e2y \u0110i\u1ec7n<\/h1>\n
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\n\u0110\u1ed3ng Hay Nh\u00f4m \u2013 N\u00ean Ch\u1ecdn Lo\u1ea1i N\u00e0o?<\/h1>\n
C\u00e1p \u0110\u1ed3ng (Copper)<\/h2>\n
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\nC\u00e1p Nh\u00f4m (Aluminum)<\/h2>\n
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\nChi\u1ec1u D\u00e0i D\u00e2y \u1ea2nh H\u01b0\u1edfng Th\u1ebf N\u00e0o?<\/h1>\n
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\nB\u1ea3ng Quy \u0110\u1ed5i AWG Sang mm\u00b2<\/h1>\n
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\n \nAWG<\/th>\n Ti\u1ebft di\u1ec7n (mm\u00b2)<\/th>\n D\u00f2ng \u0111i\u1ec7n tham kh\u1ea3o<\/th>\n<\/tr>\n<\/thead>\n \n 10 AWG<\/td>\n 5,26<\/td>\n 30\u201335 A<\/td>\n<\/tr>\n \n 8 AWG<\/td>\n 8,37<\/td>\n 40\u201355 A<\/td>\n<\/tr>\n \n 6 AWG<\/td>\n 13,3<\/td>\n 60\u201380 A<\/td>\n<\/tr>\n \n 4 AWG<\/td>\n 21,2<\/td>\n 85\u2013100 A<\/td>\n<\/tr>\n \n 2 AWG<\/td>\n 33,6<\/td>\n 110\u2013150 A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n\u1ea2nh H\u01b0\u1edfng C\u1ee7a Nhi\u1ec7t \u0110\u1ed9 V\u00e0 \u0110i\u1ec1u Ki\u1ec7n L\u1eafp \u0110\u1eb7t<\/h1>\n
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\nKinh Nghi\u1ec7m Ch\u1ecdn D\u00e2y C\u00e1p Th\u1ef1c T\u1ebf<\/h1>\n
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\nKhi N\u00e0o N\u00ean S\u1eed D\u1ee5ng C\u00e1p Song Song?<\/h1>\n
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\nV\u00ed D\u1ee5 Th\u1ef1c T\u1ebf<\/h1>\n
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\nNh\u1eefng Sai L\u1ea7m Th\u01b0\u1eddng G\u1eb7p Khi Ch\u1ecdn D\u00e2y \u0110i\u1ec7n<\/h1>\n