{"id":7449,"date":"2026-05-22T10:20:35","date_gmt":"2026-05-22T03:20:35","guid":{"rendered":"http:\/\/mese.vn\/?p=7449"},"modified":"2026-05-22T10:32:14","modified_gmt":"2026-05-22T03:32:14","slug":"dong-nhu-cau-cuc-dai-theo-ieee-519-cach-hieu-nhung-sai-lam-va-phuong-phap-tiep-can","status":"publish","type":"post","link":"https:\/\/tofu.isoinaction.com\/mesevn\/vi\/dong-nhu-cau-cuc-dai-theo-ieee-519-cach-hieu-nhung-sai-lam-va-phuong-phap-tiep-can.html","title":{"rendered":"D\u00d2NG C\u1ef0C \u0110\u1ea0I THEO IEEE 519: C\u00c1CH HI\u1ec2U, NH\u1eeeNG SAI L\u1ea6M V\u00c0 PH\u01af\u01a0NG PH\u00c1P TI\u1ebeP C\u1eacN"},"content":{"rendered":"<p><strong><em>Trong c\u00e1ch hi\u1ec3u ti\u00eau chu\u1ea9n, IEEE 519 (phi\u00ean b\u1ea3n 2022) v\u00f4 t\u00ecnh cho ph\u00e9p m\u1ed9t k\u1ecbch b\u1ea3n m\u00e0 \u1edf \u0111\u00f3 vi\u1ec7c \u0111\u1ea1t chu\u1ea9n tu\u00e2n th\u1ee7 s\u00f3ng h\u00e0i c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n b\u1eb1ng c\u00e1ch t\u0103ng t\u1ea3i l\u00ean, m\u00e0 kh\u00f4ng c\u1ea7n <\/em><\/strong><strong><em>l\u1ecdc s\u00f3ng h\u00e0i<\/em><\/strong><strong><em>. H\u00e3y \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec3 hi\u1ec3u t\u1ea1i sao v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 tr\u00e1nh \u0111\u01b0\u1ee3c hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y trong th\u1ef1c t\u1ebf.<\/em><\/strong><\/p>\n<p><span style=\"color: #3366ff;\"><strong>Gi\u1edbi thi\u1ec7u<\/strong><\/span><\/p>\n<p>C\u00e1c \u0111\u01a1n v\u1ecb v\u1eadn h\u00e0nh l\u01b0\u1edbi \u0111i\u1ec7n (\u0110\u01a1n v\u1ecb v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng truy\u1ec1n t\u1ea3i ho\u1eb7c \u0110\u01a1n v\u1ecb v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i) lu\u00f4n \u01b0u ti\u00ean b\u1ea3o v\u1ec7 s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n v\u00e0 c\u00e1c kh\u00e1ch h\u00e0ng c\u1ee7a h\u1ecd. \u0110\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y, h\u1ecd thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng t\u1ea1i \u0110i\u1ec3m \u0111\u1ea5u n\u1ed1i chung (PCC).<\/p>\n<ul>\n<li>PCC (Point of Common Coupling): L\u00e0 \u0111i\u1ec3m k\u1ebft n\u1ed1i v\u1ec1 m\u1eb7t h\u1ee3p \u0111\u1ed3ng gi\u1eefa kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng \u0111i\u1ec7n v\u00e0 \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c. Trong c\u00e1c d\u1ef1 \u00e1n, \u0111\u00e2y c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0110i\u1ec3m \u0111\u1ea5u n\u1ed1i (Point of Connection).<\/li>\n<\/ul>\n<ul>\n<li>Tr\u00e1ch nhi\u1ec7m c\u1ee7a \u0110i\u1ec7n l\u1ef1c: \u0110\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c c\u00f3 tr\u00e1ch nhi\u1ec7m cung c\u1ea5p \u0111i\u1ec7n \u00e1p ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t cho t\u1ea5t c\u1ea3 kh\u00e1ch h\u00e0ng. Th\u00f4ng qua c\u00e1c quy \u0111\u1ecbnh (th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Quy \u0111\u1ecbnh l\u01b0\u1edbi \u0111i\u1ec7n &#8211; Grid Code), h\u1ecd gi\u1edbi h\u1ea1n m\u1ee9c ph\u00e1t th\u1ea3i s\u00f3ng h\u00e0i c\u1ee7a t\u1eebng kh\u00e1ch h\u00e0ng \u0111\u1ec3 b\u1ea3o v\u1ec7 nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00e1c trong m\u1ea1ng l\u01b0\u1edbi.<\/li>\n<\/ul>\n<p>S\u00f3ng h\u00e0i \u0111i\u1ec7n \u00e1p l\u00e0 h\u1ec7 qu\u1ea3 t\u1ea5t y\u1ebfu do c\u00e1c d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i ch\u1ea1y qua tr\u1edf kh\u00e1ng c\u1ee7a m\u1ea1ng l\u01b0\u1edbi g\u00e2y ra, \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n qua \u0111\u1ecbnh lu\u1eadt Ohm:<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7450\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-1111.png\" alt=\"\" width=\"158\" height=\"66\" \/>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>U<sub>h<\/sub>: \u0110i\u1ec7n \u00e1p s\u00f3ng h\u00e0i.<\/li>\n<li>I<sub>h<\/sub>: D\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i.<\/li>\n<li>Z<sub>h<\/sub>: Tr\u1edf kh\u00e1ng m\u1ea1ng l\u01b0\u1edbi (thay \u0111\u1ed5i theo c\u00e1c b\u1eadc s\u00f3ng h\u00e0i h)<\/li>\n<\/ul>\n<p>D\u1ef1a tr\u00ean ph\u01b0\u01a1ng tr\u00ecnh, ch\u00fang ta c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c c\u00f3 hai l\u1ef1a ch\u1ecdn \u0111\u1ec3 h\u1ea1n ch\u1ebf s\u1ef1 m\u00e9o d\u1ea1ng \u0111i\u1ec7n \u00e1p:<\/p>\n<ol>\n<li>X\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng l\u01b0\u1edbi \u0111i\u1ec7n m\u1ea1nh h\u01a1n (s\u1eed d\u1ee5ng nhi\u1ec1u \u0111\u1ed3ng h\u01a1n v\u00e0 t\u0103ng dung l\u01b0\u1ee3ng truy\u1ec1n t\u1ea3i), \u0111i\u1ec1u n\u00e0y gi\u00fap l\u00e0m gi\u1ea3m tr\u1edf kh\u00e1ng l\u01b0\u1edbi \u0111i\u1ec7n Z.<\/li>\n<li>Ki\u1ec3m so\u00e1t d\u00f2ng s\u00f3ng h\u00e0i trong h\u1ec7 th\u1ed1ng b\u1eb1ng c\u00e1ch quy \u0111\u1ecbnh m\u1ee9c ph\u00e1t th\u1ea3i s\u00f3ng h\u00e0i c\u1ee7a kh\u00e1ch h\u00e0ng th\u00f4ng qua vi\u1ec7c th\u1ef1c thi c\u00e1c ti\u00eau chu\u1ea9n, qui chu\u1ea9n.<\/li>\n<\/ol>\n<p>Trong th\u1ef1c t\u1ebf, tr\u00e1ch nhi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c ph\u00e2n chia gi\u1eefa \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c v\u00e0 kh\u00e1ch h\u00e0ng:<\/p>\n<ul>\n<li><strong>\u0110\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c: X\u00e2y d\u1ef1ng m\u1ea1ng l\u01b0\u1edbi m\u1ea1nh (tr\u1edf kh\u00e1ng Z \u0111\u1ee7 th\u1ea5p)<\/strong> \u0111\u1ec3 c\u00f3 th\u1ec3 ch\u1ecbu t\u1ea3i m\u1ed9t l\u01b0\u1ee3ng s\u00f3ng h\u00e0i, c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng&#8230; \u1edf m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t \u0111i t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a \u0111i\u1ec7n \u00e1p v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng.<\/li>\n<li><strong>Kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng \u0111i\u1ec7n: Tu\u00e2n th\u1ee7 c\u00e1c ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n h\u1ee3p l\u00fd v\u1ec1 c\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng<\/strong> \u0111\u1ec3 \u0111i\u1ec7n l\u1ef1c c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 nh\u1eefng kh\u00e1ch h\u00e0ng kh\u00e1c kh\u1ecfi c\u00e1c nhi\u1ec5u ph\u00e1t th\u1ea3i.<\/li>\n<\/ul>\n<p>N\u1ebfu kh\u00f4ng c\u00f3 s\u1ef1 c\u00e2n b\u1eb1ng v\u1ec1 tr\u00e1ch nhi\u1ec7m gi\u1eefa hai b\u00ean, h\u1ec7 qu\u1ea3 s\u1ebd l\u00e0:<\/p>\n<ol>\n<li>\u0110\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c ph\u1ea3i x\u00e2y d\u1ef1ng m\u1ea1ng l\u01b0\u1edbi m\u1ea1nh m\u1ed9t c\u00e1ch qu\u00e1 m\u1ee9c v\u1edbi chi ph\u00ed kh\u1ed5ng l\u1ed3, ho\u1eb7c<\/li>\n<\/ol>\n<ol start=\"2\">\n<li>Kh\u00e1ch h\u00e0ng kh\u00f4ng th\u1ec3 v\u1eadn h\u00e0nh c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n th\u00f4ng th\u01b0\u1eddng do ch\u1ea5t l\u01b0\u1ee3ng ngu\u1ed3n cung c\u1ea5p k\u00e9m, ho\u1eb7c ph\u1ea3i \u0111\u1ea7u t\u01b0 qu\u00e1 l\u1edbn v\u00e0o c\u00e1c thi\u1ebft b\u1ecb c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng.<\/li>\n<\/ol>\n<p>T\u1ea5t c\u1ea3 c\u00e1c Quy \u0111\u1ecbnh k\u1ef9 thu\u1eadt \u0111i\u1ec7n l\u1ef1c qu\u1ed1c gia \u0111\u1ec1u d\u1ef1a tr\u00ean c\u00e1c ti\u00eau chu\u1ea9n ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng qu\u1ed1c t\u1ebf nh\u01b0 EN 50160, G5\/5, ho\u1eb7c IEEE 519. B\u00e0i vi\u1ebft n\u00e0y th\u1ea3o lu\u1eadn s\u00e2u v\u1ec1 c\u00e1ch ti\u1ebfp c\u1eadn c\u1ee7a ti\u00eau chu\u1ea9n IEEE 519 \u2013 ti\u00eau chu\u1ea9n v\u1ed1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ea5t r\u1ed9ng r\u00e3i, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf khu v\u1ef1c Ch\u00e2u M\u1ef9 v\u00e0 Trung \u0110\u00f4ng.<\/p>\n<p><span style=\"color: #3366ff;\"><strong>C\u00e1ch <\/strong><strong>hi\u1ec3u<\/strong><strong> ti\u00eau chu\u1ea9n IEEE 519 v\u1ec1 s\u00f3ng h\u00e0i<\/strong><\/span><\/p>\n<p>Ti\u00eau chu\u1ea9n IEEE 519 quy \u0111\u1ecbnh c\u00e1c gi\u1edbi h\u1ea1n cho s\u00f3ng h\u00e0i d\u00f2ng \u0111i\u1ec7n t\u1ea1i c\u00e1c c\u1ea5p \u0111i\u1ec7n \u00e1p kh\u00e1c nhau t\u1ea1i \u0111i\u1ec3m \u0111\u1ea5u n\u1ed1i chung PCC. \u0110i\u1ec3m m\u00e0 c\u00e1c gi\u1edbi h\u1ea1n s\u00f3ng h\u00e0i c\u1ee7a Quy \u0111\u1ecbnh l\u01b0\u1edbi \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng v\u00e0 \u00e1p d\u1ee5ng th\u01b0\u1eddng l\u00e0 m\u1ed9t \u0111i\u1ec3m \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo h\u1ee3p \u0111\u1ed3ng gi\u1eefa kh\u00e1ch h\u00e0ng v\u00e0 \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c \u2013 \u0111\u00e2y ch\u00ednh l\u00e0 \u0111i\u1ec3m PCC \u0111\u01b0\u1ee3c c\u00e1c b\u00ean quan t\u00e2m. Tuy nhi\u00ean, trong ti\u00eau chu\u1ea9n n\u00e0y, PCC c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn t\u1ea1i <strong>b\u1ea5t k\u1ef3 \u0111i\u1ec3m n\u00e0o trong m\u1ea1ng \u0111i\u1ec7n n\u1ed9i b\u1ed9<\/strong>, nh\u01b0 \u0111\u01b0\u1ee3c minh h\u1ecda trong h\u00ecnh b\u00ean d\u01b0\u1edbi \u2013 n\u01a1i c\u00e1c ph\u1ee5 t\u1ea3i kh\u00e1c nhau \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i l\u1ea1i v\u1edbi nhau. Tr\u01b0\u1eddng h\u1ee3p \u0111i\u1ec3n h\u00ecnh nh\u1ea5t l\u00e0 v\u1ecb tr\u00ed ph\u00eda sau m\u1ed9t m\u00e1y bi\u1ebfn \u00e1p.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-7451\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-22-1033x523.png\" alt=\"\" width=\"604\" height=\"306\" srcset=\"https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-22-1033x523.png 1033w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-22-640x324.png 640w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-22.png 1629w\" sizes=\"auto, (max-width: 604px) 100vw, 604px\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"color: #999999;\"><em>Hi\u0300nh 1: M\u1ea1ng \u0111i\u1ec7n nh\u00e0 m\u00e1y v\u00ed d\u1ee5 \u0111\u01b0\u1ee3c \u0111\u1ea5u n\u1ed1i v\u00e0o l\u01b0\u1edbi. \u0110i\u1ec3m \u0111\u1ea5u n\u1ed1i v\u1edbi \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c n\u1eb1m \u1edf c\u1ea5p cao \u00e1p, nh\u01b0ng trong m\u1ea1ng \u0111i\u1ec7n n\u1ed9i b\u1ed9 c\u00f3 nhi\u1ec1u \u0111i\u1ec3m \u0111\u1ea5u n\u1ed1i chung PCC kh\u00e1c nhau.<\/em><\/span><\/p>\n<p>Vi\u1ec7c h\u1ea1n ch\u1ebf d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i \u0111\u01b0\u1ee3c khuy\u1ebfn c\u00e1o th\u1ef1c hi\u1ec7n t\u1ea1i v\u1ecb tr\u00ed c\u00e0ng &#8220;th\u1ea5p&#8221; v\u1ec1 ph\u00eda h\u1ea1 l\u01b0u c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u00e0ng t\u1ed1t. C\u1ee5 th\u1ec3 l\u00e0 n\u00ean \u0111\u1eb7t thi\u1ebft b\u1ecb l\u1ecdc c\u00e0ng g\u1ea7n ngu\u1ed3n g\u00e2y ra s\u00f3ng h\u00e0i c\u00e0ng t\u1ed1t \u0111\u1ec3 ng\u0103n ch\u1eb7n nhi\u1ec5u ph\u00e1t th\u1ea3i lan r\u1ed9ng ra to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n l\u1edbn h\u01a1n.<\/p>\n<p>M\u1eb7c d\u00f9 \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c th\u01b0\u1eddng ch\u1ec9 quan t\u00e2m v\u00e0 ki\u1ec3m so\u00e1t c\u00e1c ch\u1ec9 s\u1ed1 t\u1ea1i \u0111i\u1ec3m \u0111\u1ea5u n\u1ed1i chung (PCC) theo h\u1ee3p \u0111\u1ed3ng, nh\u01b0ng th\u1ef1c t\u1ebf trong m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n n\u1ed9i b\u1ed9 l\u1edbn c\u1ee7a nh\u00e0 m\u00e1y, d\u00f2ng s\u00f3ng h\u00e0i c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 c\u1ed1 nghi\u00eam tr\u1ecdng \u1edf nhi\u1ec1u c\u1ea5p \u0111\u1ed9 kh\u00e1c nhau.<\/p>\n<p>S\u00f3ng h\u00e0i \u0111i\u1ec7n \u00e1p g\u00e2y ra b\u1edfi s\u00f3ng h\u00e0i d\u00f2ng \u0111i\u1ec7n t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi s\u1ee9c m\u1ea1nh l\u01b0\u1edbi \u0111i\u1ec7n. H\u1ec7 th\u1ed1ng l\u01b0\u1edbi \u0111i\u1ec7n s\u1ebd <strong>c\u00e0ng y\u1ebfu khi ch\u00fang ta \u0111i c\u00e0ng s\u00e2u v\u1ec1 ph\u00eda t\u1ea3i<\/strong> c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, v\u00e0 do \u0111\u00f3, s\u1ef1 m\u00e9o d\u1ea1ng \u0111i\u1ec7n \u00e1p s\u1ebd nguy hi\u1ec3m h\u01a1n khi c\u00e0ng g\u1ea7n c\u00e1c ph\u1ee5 t\u1ea3i, d\u1eabn \u0111\u1ebfn nguy c\u01a1 g\u00e2y ra s\u1ef1 c\u1ed1 cao h\u01a1n. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ngay c\u1ea3 khi c\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng \u0111\u00e3 \u0111\u1ea1t y\u00eau c\u1ea7u t\u1ea1i \u0111i\u1ec3m k\u1ebft n\u1ed1i c\u1ee7a \u0111i\u1ec7n l\u1ef1c. S\u00f3ng h\u00e0i \u0111i\u1ec7n \u00e1p v\u1eabn c\u00f3 th\u1ec3 g\u00e2y h\u1ea1i nghi\u00eam tr\u1ecdng b\u00ean trong h\u1ec7 th\u1ed1ng n\u1ed9i b\u1ed9 c\u1ee7a nh\u00e0 m\u00e1y, nh\u01b0 \u0111\u01b0\u1ee3c minh h\u1ecda trong bi\u1ec3u \u0111\u1ed3 b\u00ean d\u01b0\u1edbi.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-7452\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-3-910x523.png\" alt=\"\" width=\"604\" height=\"347\" srcset=\"https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-3-910x523.png 910w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-3-611x351.png 611w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-3.png 1629w\" sizes=\"auto, (max-width: 604px) 100vw, 604px\" \/><\/p>\n<p style=\"text-align: center;\"><em><span style=\"color: #999999;\">H\u00ecnh 2: D\u1ea1ng s\u00f3ng d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i kh\u00f4ng thay \u0111\u1ed5i tr\u00ean \u0111\u01b0\u1eddng \u0111i c\u1ee7a d\u00f2ng \u0111i\u1ec7n, nh\u01b0ng m\u1ee9c m\u00e9o d\u1ea1ng \u0111i\u1ec7n \u00e1p ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 c\u1ee9ng c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n, t\u1ee9c t\u1ed5ng tr\u1edf l\u01b0\u1edbi, t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau.<\/span><\/em><\/p>\n<p>Ti\u00eau chu\u1ea9n IEEE 519 trong b\u00e0i vi\u1ebft n\u00e0y ch\u00fang t\u00f4i tham chi\u1ebfu theo phi\u00ean b\u1ea3n n\u0103m 2022\u00a0 v\u00e0 c\u00e1c quy \u0111\u1ecbnh \u0111\u1ea5u n\u1ed1i l\u01b0\u1edbi \u0111i\u1ec7n, d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c gi\u1edbi h\u1ea1n s\u00f3ng h\u00e0i theo t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o l\u01b0\u1edbi \u0111i\u1ec7n.<\/p>\n<p>C\u00e1c gi\u1edbi h\u1ea1n \u0111\u1ed1i v\u1edbi t\u1eebng b\u1eadc s\u00f3ng h\u00e0i kh\u00e1c nhau v\u00e0 TDD (Total Demand Distortion) \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh t\u01b0\u01a1ng \u1ee9ng v\u1edbi I<sub>L<\/sub>, <strong>t\u1ee9c d\u00f2ng \u0111i\u1ec7n ph\u1ee5 t\u1ea3i c\u1ef1c \u0111\u1ea1i.<\/strong><\/p>\n<p>C\u00e1c gi\u1edbi h\u1ea1n s\u00f3ng h\u00e0i d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7453\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-4.png\" alt=\"\" width=\"936\" height=\"325\" srcset=\"https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-4.png 936w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-4-640x222.png 640w\" sizes=\"auto, (max-width: 936px) 100vw, 936px\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"color: #999999;\"><em>B\u1ea3ng 1: Gi\u1edbi h\u1ea1n m\u00e9o d\u1ea1ng d\u00f2ng \u0111i\u1ec7n theo IEEE 519 phi\u00ean b\u1ea3n 2022.<\/em><\/span><\/p>\n<ul>\n<li><strong>Isc (Short-Circuit Current):<\/strong> D\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch t\u1ea1i \u0111i\u1ec3m PCC. Gi\u00e1 tr\u1ecb n\u00e0y \u0111\u1ea1i di\u1ec7n cho &#8220;s\u1ee9c m\u1ea1nh&#8221; c\u1ee7a ngu\u1ed3n l\u01b0\u1edbi \u0111i\u1ec7n l\u1ef1c c\u1ea5p v\u00e0o nh\u00e0 m\u00e1y. M\u00e1y bi\u1ebfn \u00e1p ngu\u1ed3n c\u00e0ng l\u1edbn, \u0111\u01b0\u1eddng d\u00e2y truy\u1ec1n t\u1ea3i c\u00e0ng ng\u1eafn th\u00ec Isc l\u1edbn ( L\u01b0\u1edbi r\u1ea5t kh\u1ecfe )<\/li>\n<li><strong>IL (Maximum Demand Load Current):<\/strong> D\u00f2ng nhu c\u1ea7u c\u1ef1c \u0111\u1ea1i c\u1ee7a nh\u00e0 m\u00e1y.<\/li>\n<\/ul>\n<p>N\u1ebfu t\u1ef7 s\u1ed1 Isc\/IL th\u1ea5p (L\u01b0\u1edbi \u0111i\u1ec7n y\u1ebfu): Khi t\u1ea3i c\u00f3 d\u00f2ng s\u1eed d\u1ee5ng cao (IL l\u1edbn) nh\u01b0ng ngu\u1ed3n \u0111i\u1ec7n c\u1ea5p t\u1eeb \u0111i\u1ec7n l\u1ef1c l\u1ea1i nh\u1ecf\/y\u1ebfu (Isc nh\u1ecf) (v\u00ed d\u1ee5 nh\u01b0 nh\u00e0 m\u00e1y \u1edf xa trung t\u00e2m, cu\u1ed1i ngu\u1ed3n l\u01b0\u1edbi \u0111i\u1ec7n, ho\u1eb7c d\u00f9ng tr\u1ea1m bi\u1ebfn \u00e1p ngu\u1ed3n nh\u1ecf)<\/p>\n<p><span style=\"color: #3366ff;\"><strong>V\u1ea5n \u0111\u1ec1 v\u1edbi \u0111\u1ecbnh ngh\u0129a d\u00f2ng \u0111i\u1ec7n c\u1ef1c \u0111\u1ea1i<\/strong><\/span><\/p>\n<p>Th\u00f4ng th\u01b0\u1eddng, x\u00e9t t\u1eeb m\u1ed9t g\u00f3c nh\u00ecn nh\u1ea5t \u0111\u1ecbnh, s\u1ee9c m\u1ea1nh c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb g\u1ea7n nh\u01b0 c\u1ed1 \u0111\u1ecbnh. T\u1ea1i \u0111i\u1ec3m \u0111\u1ea5u n\u1ed1i v\u1edbi l\u01b0\u1edbi \u0111i\u1ec7n c\u1ee7a \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c, ph\u00eda \u0111i\u1ec7n l\u1ef1c s\u1ebd \u0111\u01b0a ra c\u00f4ng b\u1ed1 v\u1ec1 m\u1ee9c bi\u1ebfn \u0111\u1ed9ng t\u1ed1i thi\u1ec3u \u2013 t\u1ed1i \u0111a c\u1ee7a d\u00f2ng ng\u1eafn m\u1ea1ch (short-circuit level).<\/p>\n<p>Khi \u0111i v\u1ec1 ph\u00eda t\u1ea3i trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u1ee7a kh\u00e1ch h\u00e0ng, m\u00e1y bi\u1ebfn \u00e1p th\u01b0\u1eddng c\u00f3 t\u1ed5ng tr\u1edf l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi t\u1ed5ng tr\u1edf c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n ph\u00eda tr\u01b0\u1edbc n\u00f3. Do \u0111\u00f3, tr\u1edf kh\u00e1ng c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p n\u00e0y s\u1ebd chi\u1ebfm ph\u1ea7n l\u1edbn v\u00e0 quy\u1ebft \u0111\u1ecbnh t\u1ed5ng tr\u1edf kh\u00e1ng t\u00ednh t\u1eeb \u0111i\u1ec3m PCC n\u1ed9i b\u1ed9, t\u1eeb \u0111\u00f3 quy\u1ebft \u0111\u1ecbnh lu\u00f4n gi\u00e1 tr\u1ecb d\u00f2ng ng\u1eafn m\u1ea1ch t\u1ea1i ch\u00ednh t\u1ea1i \u0111i\u1ec3m PCC \u0111\u00f3.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-7454\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-5-1170x385.png\" alt=\"\" width=\"604\" height=\"199\" srcset=\"https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-5-1170x385.png 1170w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-5-640x211.png 640w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-5-248x82.png 248w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-5.png 1629w\" sizes=\"auto, (max-width: 604px) 100vw, 604px\" \/><\/p>\n<p style=\"text-align: center;\"><em><span style=\"color: #999999;\">H\u00ecnh 3: S\u1ef1 thay \u0111\u1ed5i m\u1ee9c ng\u1eafn m\u1ea1ch trong c\u00f9ng m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.<\/span><\/em><\/p>\n<p>D\u1ef1a tr\u00ean c\u00e1c n\u1ed9i dung tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng \u0111\u1ecbnh ngh\u0129a v\u1ec1 d\u00f2ng \u0111i\u1ec7n t\u1ea3i c\u1ef1c \u0111\u00f3ng vai tr\u00f2 r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c x\u00e1c l\u1eadp c\u00e1c gi\u1edbi h\u1ea1n th\u1ef1c t\u1ebf theo \u0111\u01a1n v\u1ecb Ampere.<\/p>\n<p>\u0110\u1ecbnh ngh\u0129a trong ti\u00eau chu\u1ea9n IEEE 519 qui \u0111\u1ecbnh r\u1eb1ng d\u00f2ng \u0111i\u1ec7n c\u1ef1c \u0111\u1ea1i n\u00ean \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a d\u00f2ng \u0111i\u1ec7n t\u1ea7n s\u1ed1 c\u01a1 b\u1ea3n l\u1edbn nh\u1ea5t \u0111o \u0111\u01b0\u1ee3c trong v\u00f2ng 12 th\u00e1ng tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n<p>\u0110\u1ecbnh ngh\u0129a n\u00e0y h\u1ee3p l\u00fd \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111ang v\u1eadn h\u00e0nh, n\u1ebfu d\u00f2ng \u0111i\u1ec7n , ho\u1eb7c c\u00f4ng su\u1ea5t nhu c\u1ea7u cao, x\u1ea5p x\u1ec9 v\u1edbi c\u00f4ng su\u1ea5t h\u1ee3p \u0111\u1ed3ng\/c\u00f4ng su\u1ea5t \u0111\u1ea5u n\u1ed1i \u0111\u00e3 \u0111\u0103ng k\u00fd. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb nguy\u00ean t\u1eafc gi\u1eefa c\u00e1c kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng \u0111i\u1ec7n, tuy nhi\u00ean n\u00f3 kh\u00f4ng ph\u1ea3n \u00e1nh \u0111\u1ea7y \u0111\u1ee7 t\u00e1c \u0111\u1ed9ng v\u1eadt l\u00fd th\u1ef1c t\u1ebf c\u1ee7a d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i l\u00ean l\u01b0\u1edbi \u0111i\u1ec7n.<\/p>\n<p>C\u00f4ng su\u1ea5t trong h\u1ee3p \u0111\u1ed3ng l\u00e0 m\u1ee9c c\u00f4ng su\u1ea5t l\u00e0m c\u01a1 s\u1edf \u0111\u1ec3 \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c thi\u1ebft k\u1ebf, x\u00e2y d\u1ef1ng v\u00e0 duy tr\u00ec h\u1ea1 t\u1ea7ng c\u1ea5p \u0111i\u1ec7n t\u01b0\u01a1ng \u1ee9ng. D\u00f2ng \u0111i\u1ec7n t\u01b0\u01a1ng \u1ee9ng s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n d\u1ef1a tr\u00ean c\u1ea5p \u0111i\u1ec7n \u00e1p v\u1eadn h\u00e0nh. Th\u00f4ng th\u01b0\u1eddng, c\u00f4ng su\u1ea5t trong h\u1ee3p \u0111\u1ed3ng ho\u1eb7c c\u00f4ng su\u1ea5t \u0111\u1ea5u n\u1ed1i theo h\u1ee3p \u0111\u1ed3ng c\u0169ng l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh vi\u1ec7c t\u00ednh chi ph\u00ed\/h\u00f3a \u0111\u01a1n \u0111i\u1ec7n.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng \u0111i\u1ec7n c\u00f3 \u0111i\u1ec1u ki\u1ec7n ph\u1ee5 t\u1ea3i thay \u0111\u1ed5i, ho\u1eb7c c\u00e1c nh\u00e0 m\u00e1y c\u00f3 ph\u1ee5 t\u1ea3i bi\u1ebfn thi\u00ean theo m\u00f9a, ho\u1eb7c c\u00f3 c\u00f4ng su\u1ea5t danh \u0111\u1ecbnh theo h\u1ee3p \u0111\u1ed3ng cao h\u01a1n nhu c\u1ea7u hi\u1ec7n t\u1ea1i do \u0111\u00e3 mua\/\u0111\u0103ng k\u00fd d\u1ef1 ph\u00f2ng cho m\u1ee5c \u0111\u00edch m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai, th\u00ec \u0111\u1ecbnh ngh\u0129a n\u00e0y v\u1ec1 d\u00f2ng \u0111i\u1ec7n nhu c\u1ea7u c\u1ef1c \u0111\u1ea1i s\u1ebd tr\u1edf n\u00ean c\u00f3 v\u1ea5n \u0111\u1ec1.<\/p>\n<p>H\u00e3y xem x\u00e9t t\u00ecnh hu\u1ed1ng sau:<\/p>\n<ul>\n<li>Trong v\u00ed d\u1ee5 v\u1ec1 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n n\u00e0y, c\u00f4ng su\u1ea5t trong h\u1ee3p \u0111\u1ed3ng l\u00e0 2 MVA.<\/li>\n<li>T\u1ef7 s\u1ed1 Isc\/IL \u0111\u01b0\u1ee3c gi\u1ea3 \u0111\u1ecbnh n\u1eb1m trong kho\u1ea3ng t\u1eeb 50 \u0111\u1ebfn 10<\/li>\n<\/ul>\n<table style=\"height: 104px;\" width=\"559\">\n<tbody>\n<tr>\n<td>Ph\u1ee5 t\u1ea3i phi tuy\u1ebfn l\u00e0 kh\u00f4ng \u0111\u1ed5i, v\u00e0 do kh\u00f4ng c\u00f3 ph\u1ee5 t\u1ea3i n\u00e0o kh\u00e1c, d\u00f2ng \u0111i\u1ec7n nhu c\u1ea7u t\u1ed5ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi d\u00f2ng \u0111i\u1ec7n th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n c\u1ee7a ph\u1ee5 t\u1ea3i. Ph\u1ee5 t\u1ea3i c\u00f3 ph\u1ed5 s\u00f3ng h\u00e0i nh\u01b0 sau v\u00e0 kh\u00f4ng \u0111\u00e1p \u1ee9ng c\u00e1c gi\u1edbi h\u1ea1n cho ph\u00e9p:<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7455 aligncenter\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-6-590x523.png\" alt=\"\" width=\"279\" height=\"247\" srcset=\"https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-6-590x523.png 590w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-6-396x351.png 396w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-6.png 700w\" sizes=\"auto, (max-width: 279px) 100vw, 279px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7456\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-7.png\" alt=\"\" width=\"590\" height=\"286\" \/><\/p>\n<p style=\"text-align: center;\"><em><span style=\"color: #999999;\">B\u1ea3ng 2: Ph\u1ed5 s\u00f3ng h\u00e0i c\u1ee7a ph\u1ee5 t\u1ea3i \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi c\u00e1c gi\u1edbi h\u1ea1n s\u00f3ng h\u00e0i trong t\u00ecnh hu\u1ed1ng ban \u0111\u1ea7u.<\/span><\/em><\/p>\n<p>H\u00e3y xem n\u1ebfu ch\u00fang ta l\u1eafp th\u00eam m\u1ed9t d\u00e0n \u0111i\u1ec7n tr\u1edf c\u1ed1 \u0111\u1ecbnh 700 kW song song v\u1edbi ph\u1ee5 t\u1ea3i ban \u0111\u1ea7u.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-7457\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-8-585x523.png\" alt=\"\" width=\"306\" height=\"273\" srcset=\"https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-8-585x523.png 585w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-8-392x351.png 392w, https:\/\/tofu.isoinaction.com\/mesevn\/wp-content\/uploads\/sites\/194\/2026\/05\/\u1ea3nh-8.png 692w\" sizes=\"auto, (max-width: 306px) 100vw, 306px\" \/><\/p>\n<p><strong>Vi\u1ec7c n\u00e0y l\u00e0m t\u0103ng d\u00f2ng \u0111i\u1ec7n<\/strong> <strong>c\u01a1 b\u1ea3n, nh\u01b0ng kh\u00f4ng l\u00e0m thay \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i. V\u00e0<\/strong><strong> t\u1ef1<\/strong><strong> nhi\u00ean, h\u1ec7 th\u1ed1ng l\u1ea1i \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u00e1c gi\u1edbi h\u1ea1n cho ph\u00e9p!<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-7458\" src=\"http:\/\/mese.vn\/wp-content\/uploads\/2026\/05\/\u1ea3nh-9.png\" alt=\"\" width=\"552\" height=\"274\" \/><\/p>\n<p style=\"text-align: center;\"><em><span style=\"color: #999999;\">B\u1ea3ng 3: Ph\u1ed5 s\u00f3ng h\u00e0i c\u1ee7a ph\u1ee5 t\u1ea3i \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi c\u00e1c gi\u1edbi h\u1ea1n s\u00f3ng h\u00e0i sau khi b\u1ed5 sung th\u00eam ph\u1ee5 t\u1ea3i.<\/span><\/em><\/p>\n<p>Trong c\u1ea3 hai tr\u01b0\u1eddng h\u1ee3p, ph\u1ee5 t\u1ea3i v\u1eabn c\u00f9ng m\u1ed9t gi\u00e1 tr\u1ecb d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i l\u00e0 216,46 A, v\u00e0 g\u00e2y ra c\u00f9ng m\u1ed9t v\u1ea5n \u0111\u1ec1 nh\u01b0 nhau. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn m\u1ed9t ngh\u1ecbch l\u00fd c\u01a1 b\u1ea3n: vi\u1ec7c \u0111\u00e1p \u1ee9ng gi\u1edbi h\u1ea1n s\u00f3ng h\u00e0i c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng c\u1ea7n b\u1ea5t k\u1ef3 s\u1ef1 suy gi\u1ea3m n\u00e0o v\u1ec1 m\u1ee9c ph\u00e1t th\u1ea3i s\u00f3ng h\u00e0i.<\/p>\n<p>V\u00ec v\u1eady, trong th\u1ef1c t\u1ebf, m\u1eb7c d\u00f9 ti\u00eau chu\u1ea9n \u0111\u00e3 c\u00f3 \u0111\u1ecbnh ngh\u0129a, d\u00f2ng \u0111i\u1ec7n c\u1ef1c \u0111\u1ea1i, hay d\u00f2ng \u0111i\u1ec7n tham chi\u1ebfu th\u01b0\u1eddng l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c th\u1ecfa thu\u1eadn v\u1edbi \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c t\u1ea1i \u0111i\u1ec3m PCC, ho\u1eb7c t\u1ea1i c\u00e1c PCC trong m\u1ea1ng \u0111i\u1ec7n n\u1ed9i b\u1ed9.<\/p>\n<p>Do h\u1ea1 t\u1ea7ng \u0111i\u1ec7n ph\u00eda\u00a0 ngu\u1ed3n \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng \u0111\u1ec3 c\u1ea5p cho c\u00f4ng su\u1ea5t trong h\u1ee3p \u0111\u1ed3ng gi\u1eefa hai b\u00ean, n\u00ean gi\u00e1 tr\u1ecb n\u00e0y cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m tham chi\u1ebfu ph\u00f9 h\u1ee3p cho vi\u1ec7c \u0111\u00e1nh gi\u00e1 s\u00f3ng h\u00e0i. \u0110\u1ed3ng th\u1eddi, h\u1ec7 th\u1ed1ng c\u0169ng c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c c\u00e1c d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p.<\/p>\n<p><span style=\"color: #3366ff;\"><strong>K\u1ebft lu\u1eadn<\/strong><\/span><\/p>\n<p>\u0110\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c thi\u1ebft l\u1eadp c\u00e1c gi\u1edbi h\u1ea1n ph\u00e1t th\u1ea3i d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i \u0111\u1ed1i v\u1edbi kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng \u0111i\u1ec7n nh\u1eb1m b\u1ea3o v\u1ec7 l\u01b0\u1edbi \u0111i\u1ec7n v\u00e0 c\u00e1c kh\u00e1ch h\u00e0ng kh\u00e1c kh\u1ecfi hi\u1ec7n t\u01b0\u1ee3ng m\u00e9o d\u1ea1ng \u0111i\u1ec7n \u00e1p. \u0110\u1ed3ng th\u1eddi, \u0111\u01a1n v\u1ecb \u0111i\u1ec7n l\u1ef1c c\u0169ng x\u00e2y d\u1ef1ng l\u01b0\u1edbi \u0111i\u1ec7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c m\u1ed9t m\u1ee9c t\u1ea3i d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<p>N\u1ebfu c\u00e1c gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i kh\u00f4ng \u0111\u01b0\u1ee3c d\u1ef1a tr\u00ean m\u1ed9t gi\u00e1 tr\u1ecb c\u1ed1 \u0111\u1ecbnh, th\u00ec vi\u1ec7c \u00e1p d\u1ee5ng gi\u1edbi h\u1ea1n s\u1ebd d\u1ec5 b\u1ecb di\u1ec5n gi\u1ea3i kh\u00e1c nhau, ho\u1eb7c kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng \u0111i\u1ec7n c\u00f3 th\u1ec3 ph\u1ea3i ch\u1ecbu c\u00e1c gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i kh\u00f4ng c\u00f4ng b\u1eb1ng v\u00e0 kh\u00f4ng c\u00f3 c\u01a1 s\u1edf k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<p>V\u00ec l\u00fd do \u0111\u00f3, trong c\u00e1c nghi\u00ean c\u1ee9u s\u00f3ng h\u00e0i th\u1ef1c t\u1ebf v\u00e0 trong c\u00e1c th\u1ecfa thu\u1eadn \u0111\u1ea5u n\u1ed1i l\u01b0\u1edbi \u0111i\u1ec7n, d\u00f2ng \u0111i\u1ec7n tham chi\u1ebfu th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p ho\u1eb7c c\u00f4ng su\u1ea5t \u0111\u1ea5u n\u1ed1i\/c\u00f4ng su\u1ea5t h\u1ee3p \u0111\u1ed3ng, thay v\u00ec d\u1ef1a tr\u00ean c\u00e1c ph\u00e9p \u0111o l\u1ecbch s\u1eed.<\/p>\n<p>Ngu\u1ed3n: https:\/\/meruspower.com\/blog\/ieee-519-maximum-demand-current-interpretation-pitfalls-and-practical-approach\/<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong c\u00e1ch hi\u1ec3u ti\u00eau chu\u1ea9n, IEEE 519 (phi\u00ean b\u1ea3n 2022) v\u00f4 t\u00ecnh cho ph\u00e9p m\u1ed9t k\u1ecbch b\u1ea3n m\u00e0 \u1edf \u0111\u00f3 vi\u1ec7c \u0111\u1ea1t chu\u1ea9n tu\u00e2n th\u1ee7 s\u00f3ng h\u00e0i c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n b\u1eb1ng c\u00e1ch t\u0103ng t\u1ea3i l\u00ean, m\u00e0 kh\u00f4ng c\u1ea7n l\u1ecdc s\u00f3ng h\u00e0i. H\u00e3y \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec3 hi\u1ec3u t\u1ea1i &hellip; <a href=\"https:\/\/tofu.isoinaction.com\/mesevn\/vi\/dong-nhu-cau-cuc-dai-theo-ieee-519-cach-hieu-nhung-sai-lam-va-phuong-phap-tiep-can.html\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">D\u00d2NG C\u1ef0C \u0110\u1ea0I THEO IEEE 519: C\u00c1CH HI\u1ec2U, NH\u1eeeNG SAI L\u1ea6M V\u00c0 PH\u01af\u01a0NG PH\u00c1P TI\u1ebeP C\u1eacN<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":120142,"featured_media":7451,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[],"class_list":["post-7449","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc-vi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>D\u00d2NG C\u1ef0C \u0110\u1ea0I THEO IEEE 519: C\u00c1CH HI\u1ec2U, NH\u1eeeNG SAI L\u1ea6M V\u00c0 PH\u01af\u01a0NG PH\u00c1P TI\u1ebeP C\u1eacN - MES Engineering<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tofu.isoinaction.com\/mesevn\/vi\/dong-nhu-cau-cuc-dai-theo-ieee-519-cach-hieu-nhung-sai-lam-va-phuong-phap-tiep-can.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00d2NG C\u1ef0C \u0110\u1ea0I THEO IEEE 519: C\u00c1CH HI\u1ec2U, NH\u1eeeNG SAI L\u1ea6M V\u00c0 PH\u01af\u01a0NG PH\u00c1P TI\u1ebeP C\u1eacN\" \/>\n<meta property=\"og:description\" content=\"Trong c\u00e1ch hi\u1ec3u ti\u00eau chu\u1ea9n, IEEE 519 (phi\u00ean b\u1ea3n 2022) v\u00f4 t\u00ecnh cho ph\u00e9p m\u1ed9t k\u1ecbch b\u1ea3n m\u00e0 \u1edf \u0111\u00f3 vi\u1ec7c \u0111\u1ea1t chu\u1ea9n tu\u00e2n th\u1ee7 s\u00f3ng h\u00e0i c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n b\u1eb1ng c\u00e1ch t\u0103ng t\u1ea3i l\u00ean, m\u00e0 kh\u00f4ng c\u1ea7n l\u1ecdc s\u00f3ng h\u00e0i. 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