{"id":2439,"date":"2026-08-21T05:20:00","date_gmt":"2026-08-20T21:20:00","guid":{"rendered":"https:\/\/cnbygele.com\/?p=2439"},"modified":"2026-08-24T17:22:51","modified_gmt":"2026-08-24T09:22:51","slug":"how-to-calculate-power-factor","status":"publish","type":"post","link":"https:\/\/cnbygele.com\/vi\/blog\/how-to-calculate-power-factor\/","title":{"rendered":"C\u00e1ch T\u00ednh H\u1ec7 S\u1ed1 C\u00f4ng Su\u1ea5t: C\u00f4ng Th\u1ee9c v\u00e0 C\u00e1c B\u01b0\u1edbc \u0110o \u0110\u1ea1c T\u1ea1i Nh\u00e0 M\u00e1y"},"content":{"rendered":"<div class=\"b2b-article\">\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>C\u00e1ch t\u00ednh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/strong> b\u1eaft \u0111\u1ea7u b\u1eb1ng m\u1ed9t t\u1ef7 l\u1ec7: c\u00f4ng su\u1ea5t th\u1ef1c t\u00ednh b\u1eb1ng kilowatt chia cho c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn t\u00ednh b\u1eb1ng kilovolt-ampere t\u1eeb c\u00f9ng m\u1ed9t kho\u1ea3ng \u0111o. S\u1eed d\u1ee5ng k\u1ebft qu\u1ea3 \u0111\u00f3 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 d\u00f2ng \u0111i\u1ec7n v\u00e0 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u01b0\u1eddng c\u1ea5p tr\u01b0\u1edbc khi x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc \u0111i\u1ec1u ch\u1ec9nh. B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y c\u00f4ng th\u1ee9c h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t, tam gi\u00e1c c\u00f4ng su\u1ea5t, \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n ba pha, s\u1ed5 ghi c\u1ee7a \u0111\u1ed3ng h\u1ed3 nh\u00e0 m\u00e1y, c\u00e1c l\u01b0u \u00fd ghi nh\u1eadt k\u00fd, v\u00e0 khi n\u00e0o SVG \u0111\u1ed9ng ph\u00f9 h\u1ee3p ti\u1ebfp theo.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"K\u1ef9 s\u01b0 nh\u00e0 m\u00e1y t\u00ednh to\u00e1n y\u1ebfu t\u1ed1 c\u00f4ng su\u1ea5t t\u1eeb c\u00e1c s\u1ed1 li\u1ec7u \u0111\u1ed3ng h\u1ed3 c\u1ea5p ngu\u1ed3n\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/08\/pf-calc-featured-1.webp\" \/><\/figure>\n<nav class=\"b2b-toc\" style=\"background:#f5f8fa;padding:16px 20px;border-radius:8px;margin:0 0 24px\">\n<h2 id=\"contents\" style=\"margin:42px 0 14px;scroll-margin-top:96px\">M\u1ee5c l\u1ee5c<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"#power-factor-formula-pf-kw-kva\">C\u00f4ng th\u1ee9c H\u1ec7 s\u1ed1 C\u00f4ng su\u1ea5t: PF = kW \u00f7 kVA<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#use-the-power-triangle-to-relate-kw-kva-and-kvar\">S\u1eed d\u1ee5ng Tam gi\u00e1c C\u00f4ng su\u1ea5t \u0111\u1ec3 Li\u00ean h\u1ec7 kW, kVA v\u00e0 kVAR<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#calculate-power-factor-from-voltage-current-and-kw\">T\u00ednh H\u1ec7 s\u1ed1 C\u00f4ng su\u1ea5t t\u1eeb \u0110i\u1ec7n \u00e1p, D\u00f2ng \u0111i\u1ec7n v\u00e0 kW<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#read-plant-meter-registers-when-kva-is-missing\">\u0110\u1ecdc s\u1ed5 ghi c\u1ee7a \u0111\u1ed3ng h\u1ed3 nh\u00e0 m\u00e1y khi thi\u1ebfu kVA<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#why-a-low-calculated-power-factor-raises-plant-current\">T\u1ea1i sao h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p t\u00ednh to\u00e1n l\u1ea1i l\u00e0m t\u0103ng d\u00f2ng \u0111i\u1ec7n c\u1ee7a nh\u00e0 m\u00e1y<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#when-calculation-needs-true-power-factor-logging\">Khi n\u00e0o c\u1ea7n ghi nh\u1eadt k\u00fd H\u1ec7 s\u1ed1 C\u00f4ng su\u1ea5t th\u1ef1c s\u1ef1 trong t\u00ednh to\u00e1n<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#when-dynamic-svg-compensation-fits-after-you-calculate-pf\">Khi n\u00e0o ph\u00f9 h\u1ee3p \u0111i\u1ec1u ch\u1ec9nh SVG \u0111\u1ed9ng sau khi b\u1ea1n t\u00ednh PF<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#faqs\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"power-factor-formula-pf-kw-kva\">C\u00f4ng th\u1ee9c H\u1ec7 s\u1ed1 C\u00f4ng su\u1ea5t: PF = kW \u00f7 kVA<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t b\u1eb1ng c\u00f4ng su\u1ea5t th\u1ef1c \/ c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng chia cho c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn khi c\u1ea3 hai \u0111\u1ec1u \u0111o trong c\u00f9ng m\u1ed9t kho\u1ea3ng th\u1eddi gian.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00f4ng th\u1ee9c h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 PF = kW \u00f7 kVA. Gi\u1eef \u0111\u01a1n v\u1ecb nh\u1ea5t qu\u00e1n \u0111\u1ec3 c\u1ea3 hai gi\u00e1 tr\u1ecb \u0111\u1ec1u \u1edf \u0111\u01a1n v\u1ecb kilo ho\u1eb7c c\u1ea3 hai \u0111\u1ec1u \u1edf watt v\u00e0 volt-ampere.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">M\u1ed9t \u0111\u01b0\u1eddng c\u1ea5p cho th\u1ea5y 80 kW v\u00e0 100 kVA c\u00f9ng l\u00fac c\u00f3 PF = 0.80. S\u1ed1 n\u00e0y c\u00f3 ngh\u0129a l\u00e0 80% c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn cung c\u1ea5p l\u00e0 c\u00f4ng vi\u1ec7c th\u1ef1c; ph\u1ea7n c\u00f2n l\u1ea1i l\u00e0 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng trong kho\u1ea3ng \u0111\u00f3.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00e1c ph\u00e9p s\u1eafp x\u1ebfp l\u1ea1i gi\u00fap khi m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng thi\u1ebfu.<\/p>\n<div class=\"b2b-table-scroll\" role=\"region\" aria-label=\"B\u1ea3ng d\u1eef li\u1ec7u c\u00f3 th\u1ec3 cu\u1ed9n\" tabindex=\"0\" style=\"width:100%;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 18px\">\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">C\u1ea7n<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">C\u00f4ng th\u1ee9c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">PF = kW \u00f7 kVA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">S\u1ee9c m\u1ea1nh r\u00f5 r\u00e0ng<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">kVA = kW \u00f7 PF<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00f4ng su\u1ea5t th\u1ef1c<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">kW = kVA \u00d7 PF<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">kVAR = \u221a(kVA\u00b2 \u2212 kW\u00b2)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin:0 0 16px;line-height:1.7\">V\u00ed d\u1ee5: 100 kW \u1edf h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t 0.8 y\u00eau c\u1ea7u 125 kVA. M\u00e1y bi\u1ebfn \u00e1p, m\u00e1y ph\u00e1t \u0111i\u1ec7n v\u00e0 \u0111\u01b0\u1eddng d\u00e2y c\u1ea3m th\u1ea5y r\u1eb1ng kVA cao h\u01a1n ngay c\u1ea3 khi c\u00f4ng su\u1ea5t kilowatt c\u1ee7a qu\u00e1 tr\u00ecnh v\u1eabn kh\u00f4ng \u0111\u1ed5i.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Li\u00ean k\u1ebft t\u1ef7 l\u1ec7 n\u00e0y v\u1edbi <a href=\"https:\/\/cnbygele.com\/vi\/blog\/active-vs-reactive-power\/\">C\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng v\u00e0 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng<\/a> khi nh\u00f3m c\u1ee7a b\u1ea1n v\u1eabn \u0111ang pha tr\u1ed9n watt v\u00e0 VAR tr\u00ean c\u00f9ng m\u1ed9t b\u1ea3ng tr\u1eafng.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Tam gi\u00e1c c\u00f4ng su\u1ea5t li\u00ean quan \u0111\u1ebfn kW, kVA v\u00e0 kVAR\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/08\/pf-power-triangle-1.webp\" \/><\/figure>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"use-the-power-triangle-to-relate-kw-kva-and-kvar\">S\u1eed d\u1ee5ng Tam gi\u00e1c C\u00f4ng su\u1ea5t \u0111\u1ec3 Li\u00ean h\u1ec7 kW, kVA v\u00e0 kVAR<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Trong \u0111i\u1ec1u ki\u1ec7n s\u00f3ng sin, h\u00ecnh tam gi\u00e1c c\u00f4ng su\u1ea5t k\u1ebft n\u1ed1i c\u00f4ng su\u1ea5t th\u1ef1c, c\u00f4ng su\u1ea5t ph\u1ea3n \u1ee9ng v\u00e0 c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn qua S\u00b2 = P\u00b2 + Q\u00b2.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">N\u1ebfu \u0111\u1ed3ng h\u1ed3 \u0111\u00e3 cung c\u1ea5p kW v\u00e0 kVA, c\u00f4ng su\u1ea5t ph\u1ea3n \u1ee9ng l\u00e0 kVAR = \u221a(kVA\u00b2 \u2212 kW\u00b2). Gi\u00e1 tr\u1ecb n\u00e0y l\u00e0 ph\u1ea7n c\u1ea7n b\u00f9 c\u1ee7a t\u1ee5 \u0111i\u1ec7n ho\u1eb7c SVG n\u1ebfu b\u1ea1n mu\u1ed1n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cao h\u01a1n v\u1edbi t\u1ea3i th\u1ef1c t\u1ebf gi\u1ed1ng nhau.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">G\u00f3c gi\u1eefa ph\u00eda kW v\u00e0 huy\u1ec1n tuy\u1ebfn kVA l\u00e0 g\u00f3c l\u1ec7ch pha \u03c6. Trong \u0111i\u1ec1u ki\u1ec7n s\u00f3ng sin s\u1ea1ch, PF b\u1eb1ng cos\u03c6. \u0110\u1ecbnh l\u00fd n\u00e0y kh\u00f4ng \u0111\u00fang khi h\u00e0i s\u00f3ng l\u00e0m m\u00e9o d\u1ea1ng s\u00f3ng d\u00f2ng \u0111i\u1ec7n, \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao vi\u1ec7c ghi l\u1ea1i sau n\u00e0y l\u1ea1i quan tr\u1ecdng.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Khi b\u1ea1n \u0111\u00e3 bi\u1ebft m\u1ee5c ti\u00eau PF v\u00e0 kW hi\u1ec7n t\u1ea1i, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng b\u01b0\u1edbc ph\u1ea3n \u1ee9ng c\u1ea7n thi\u1ebft b\u1eb1ng c\u00e1ch so s\u00e1nh kVAR hi\u1ec7n t\u1ea1i v\u1edbi kVAR cho ph\u00e9p t\u1ea1i PF m\u1ee5c ti\u00eau. H\u00e3y th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh d\u1ef1a tr\u00ean kW v\u00e0 kVA \u0111o \u0111\u01b0\u1ee3c tr\u01b0\u1edbc; \u0111\u1eebng t\u1ef1 ngh\u0129 ra k\u1ebft qu\u1ea3 c\u1ee7a nh\u00e0 m\u00e1y.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng d\u1eabn Q ri\u00eang t\u1eeb \u0111\u1ed3ng h\u1ed3 nh\u00e0 m\u00e1y, s\u1eed d\u1ee5ng <a href=\"https:\/\/cnbygele.com\/vi\/blog\/calculate-reactive-power\/\">c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t ph\u1ea3n \u1ee9ng<\/a>.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"calculate-power-factor-from-voltage-current-and-kw\">T\u00ednh H\u1ec7 s\u1ed1 C\u00f4ng su\u1ea5t t\u1eeb \u0110i\u1ec7n \u00e1p, D\u00f2ng \u0111i\u1ec7n v\u00e0 kW<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Khi m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n v\u00e0 kilowatt nh\u01b0ng kh\u00f4ng hi\u1ec3n th\u1ecb kVA, h\u00e3y t\u00ednh c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn tr\u01b0\u1edbc, sau \u0111\u00f3 chia ra.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ed1i v\u1edbi m\u1ea1ch m\u1ed9t pha: kVA = (V \u00d7 I) \u00f7 1000, sau \u0111\u00f3 PF = kW \u00f7 kVA. S\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p RMS v\u00e0 d\u00f2ng RMS tr\u00ean c\u00f9ng m\u1ed9t m\u1ea1ch.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ed1i v\u1edbi c\u00f4ng su\u1ea5t h\u1ec7 s\u1ed1 ba pha c\u00e2n b\u1eb1ng, s\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p d\u00e2y-\u0111\u1ebfn-d\u00e2y c\u1ee7a h\u1ec7 th\u1ed1ng ba pha v\u1edbi d\u00f2ng d\u00e2y: kVA = (\u221a3 \u00d7 V \u00d7 I) \u00f7 1000, sau \u0111\u00f3 PF = kW \u00f7 kVA. \u221a3 kho\u1ea3ng 1.732. T\u01b0\u01a1ng \u0111\u01b0\u01a1ng, PF = kW \u00f7 ((\u221a3 \u00d7 V \u00d7 I) \u00f7 1000).<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">V\u00ed d\u1ee5: \u0110i\u1ec7n \u00e1p d\u00e2y-\u0111\u1ebfn-d\u00e2y 480 V, d\u00f2ng d\u00e2y 200 A, v\u00e0 c\u00f4ng su\u1ea5t 120 kW tr\u00ean \u0111\u01b0\u1eddng d\u00e2y c\u00e2n b\u1eb1ng cho ra kVA = (1.732 \u00d7 480 \u00d7 200) \u00f7 1000 \u2248 166.3 kVA, do \u0111\u00f3 PF \u2248 120 \u00f7 166.3 \u2248 0.72.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">B\u1ecf qua ph\u00e9p t\u00ednh nhanh \u221a3 khi c\u00e1c pha kh\u00f4ng c\u00e2n b\u1eb1ng ho\u1eb7c khi b\u1ed9 ph\u00e2n t\u00edch c\u00f4ng su\u1ea5t \u0111\u00e3 b\u00e1o c\u00e1o ch\u00ednh x\u00e1c kW v\u00e0 kVA. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3, tin t\u01b0\u1edfng v\u00e0o t\u1ef7 l\u1ec7 c\u1ee7a b\u1ed9 ph\u00e2n t\u00edch h\u01a1n l\u00e0 \u01b0\u1edbc l\u01b0\u1ee3ng th\u1ee7 c\u00f4ng d\u1ef1a tr\u00ean V\u00d7I.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Ngu\u1ed3n \u0111i\u1ec7n v\u00e0 d\u00f2ng \u0111i\u1ec7n ba pha \u0111\u1ec3 t\u00ednh y\u1ebfu t\u1ed1 c\u00f4ng su\u1ea5t\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/08\/pf-three-phase-meter-1.webp\" \/><\/figure>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"read-plant-meter-registers-when-kva-is-missing\">\u0110\u1ecdc s\u1ed5 ghi c\u1ee7a \u0111\u1ed3ng h\u1ed3 nh\u00e0 m\u00e1y khi thi\u1ebfu kVA<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ed3ng h\u1ed3 c\u1ee7a nh\u00e0 m\u00e1y \/ ti\u1ec7n \u00edch th\u01b0\u1eddng l\u01b0u tr\u1eef c\u00e1c ch\u1ec9 s\u1ed1 n\u0103ng l\u01b0\u1ee3ng v\u00e0 nhu c\u1ea7u thay v\u00ec hi\u1ec3n th\u1ecb PF tr\u1ef1c ti\u1ebfp.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">N\u1ebfu c\u00f9ng m\u1ed9t kho\u1ea3ng th\u1eddi gian ghi l\u1ea1i kilowatt-gi\u1edd v\u00e0 kilovolt-ampere-gi\u1edd, PF trung b\u00ecnh \u2248 kWh \u00f7 kVAh. N\u1ebfu b\u1ea1n c\u00f3 kWh v\u00e0 kvarh cho kho\u1ea3ng th\u1eddi gian \u0111\u00f3, PF trung b\u00ecnh \u2248 kWh \u00f7 \u221a(kWh\u00b2 + kvarh\u00b2).<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00e1c b\u00e0i ki\u1ec3m tra c\u1ee7a nh\u00e0 m\u00e1y cho th\u1ea5y l\u00fd do t\u1ea1i sao kho\u1ea3ng th\u1eddi gian l\u1ea1i quan tr\u1ecdng: m\u1ed9t b\u00e0i h\u01b0\u1edbng d\u1eabn \u0111\u1ed3ng h\u1ed3 \u0111\u00e3 c\u00f4ng b\u1ed1 s\u1eed d\u1ee5ng 56.640 kWh v\u00e0 21.280 kvarh trong m\u1ed9t th\u00e1ng \u0111\u1ec3 t\u00ednh PF trung b\u00ecnh \u2248 0.936, trong khi c\u00f4ng su\u1ea5t kW \u0111\u1ec9nh v\u1eabn kh\u00f4ng th\u1ec3 ti\u1ebft l\u1ed9 PF t\u1ea1i \u0111\u1ec9nh.<\/p>\n<blockquote>\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>Quan tr\u1ecdng:<\/strong> Ph\u00f9 h\u1ee3p v\u1edbi kho\u1ea3ng th\u1eddi gian. C\u00f4ng su\u1ea5t \u0111\u1ec9nh kW tr\u00ean h\u00f3a \u0111\u01a1n m\u00e0 kh\u00f4ng c\u00f3 \u0111\u1ed3ng h\u1ed3 ph\u1ea3n \u1ee9ng ho\u1eb7c c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn ph\u00f9 h\u1ee3p kh\u00f4ng cung c\u1ea5p PF t\u1ea1i \u0111\u1ec9nh \u0111\u00f3, v\u00e0 c\u00e1c nh\u00e0 m\u00e1y c\u00f4ng nghi\u1ec7p kh\u00f4ng n\u00ean gi\u1ea3 \u0111\u1ecbnh PF = 1 khi chuy\u1ec3n \u0111\u1ed5i nhu c\u1ea7u kW th\u00e0nh kVA ho\u1eb7c ampe \u2014 ngu\u1ed3n: https:\/\/forums.mikeholt.com\/threads\/determining-power-factor-to-use-for-load-calculation-from-utility-bills.132045\/<\/p>\n<\/blockquote>\n<div class=\"b2b-table-scroll\" role=\"region\" aria-label=\"B\u1ea3ng d\u1eef li\u1ec7u c\u00f3 th\u1ec3 cu\u1ed9n\" tabindex=\"0\" style=\"width:100%;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 18px\">\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">\u0110\u01b0\u1eddng d\u1eabn \u0111\u1ed3ng h\u1ed3<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Y\u00eau c\u1ea7u \u0111\u1ea7u v\u00e0o<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">\u0110\u1ea7u ra<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">C\u1ea9n th\u1eadn<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">T\u1ef7 l\u1ec7 tr\u1ef1c ti\u1ebfp<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">kW v\u00e0 kVA, c\u00f9ng kho\u1ea3ng th\u1eddi gian<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">PF t\u1ee9c th\u00ec ho\u1eb7c theo y\u00eau c\u1ea7u<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1c kho\u1ea3ng th\u1eddi gian pha tr\u1ed9n l\u00e0m m\u1ea5t hi\u1ec7u l\u1ef1c t\u1ef7 l\u1ec7<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">V \/ I \/ kW<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">V, I, kW (\u221a3 n\u1ebfu ba pha c\u00e2n b\u1eb1ng)<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">PF t\u00ednh to\u00e1n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">M\u1ea5t c\u00e2n b\u1eb1ng ho\u1eb7c h\u00e0i h\u00f2a l\u00e0m l\u1ec7ch V\u00d7I kVA<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u0103ng k\u00fd n\u0103ng l\u01b0\u1ee3ng<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">kWh v\u1edbi kVAh ho\u1eb7c kvarh<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Trung b\u00ecnh PF tr\u00ean c\u1eeda s\u1ed5 \u0111o<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Trung b\u00ecnh PF \u2260 PF t\u1ea1i c\u00f4ng su\u1ea5t \u0111\u1ec9nh kW<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin:0 0 16px;line-height:1.7\">Nh\u00f3m mua h\u00e0ng v\u00e0 b\u1ea3o tr\u00ec g\u1eb7p ph\u1ea3i kho\u1ea3ng c\u00e1ch n\u00e0y khi h\u00f3a \u0111\u01a1n ti\u1ec7n \u00edch li\u1ec7t k\u00ea c\u00f4ng su\u1ea5t \u0111\u1ec9nh kW nh\u01b0ng kh\u00f4ng c\u00f3 c\u1ed9t PF. T\u00ednh ho\u1eb7c \u0111o PF tr\u01b0\u1edbc khi chuy\u1ec3n \u0111\u1ed5i s\u1ed1 li\u1ec7u kW \u0111\u00f3 th\u00e0nh ampe c\u1ee7a \u0111\u01b0\u1eddng c\u1ea5p ngu\u1ed3n.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"\u0110\u1ed3ng h\u1ed3 \u0111o c\u1ee7a nh\u00e0 m\u00e1y d\u00f9ng \u0111\u1ec3 t\u00ednh trung b\u00ecnh y\u1ebfu t\u1ed1 c\u00f4ng su\u1ea5t\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/08\/pf-meter-registers-1.webp\" \/><\/figure>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"why-a-low-calculated-power-factor-raises-plant-current\">T\u1ea1i sao h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p t\u00ednh to\u00e1n l\u1ea1i l\u00e0m t\u0103ng d\u00f2ng \u0111i\u1ec7n c\u1ee7a nh\u00e0 m\u00e1y<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a nh\u00e0 m\u00e1y th\u1ea5p g\u00e2y t\u0103ng d\u00f2ng \u0111i\u1ec7n cho c\u00f9ng m\u1ed9t c\u00f4ng su\u1ea5t th\u1ef1c, l\u00e0m t\u0103ng t\u1ed5n th\u1ea5t \u0111\u1ed3ng v\u00e0 s\u1ee5t \u00e1p tr\u00ean c\u00e1c \u0111\u01b0\u1eddng c\u1ea5p ngu\u1ed3n c\u1ee7a nh\u00e0 m\u00e1y.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u1ede m\u1ed9t c\u00f4ng su\u1ea5t kW c\u1ed1 \u0111\u1ecbnh, gi\u1ea3m PF l\u00e0m t\u0103ng kVA, v\u00e0 ngu\u1ed3n cung ph\u1ea3i cung c\u1ea5p nhi\u1ec1u ampe h\u01a1n. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m c\u00f3 th\u1ec3 b\u00e1o c\u00e1o PF g\u1ea7n 0.6 trong m\u1ed9t s\u1ed1 t\u1ed5 h\u1ee3p t\u1ea3i v\u00e0 v\u1eabn c\u1ea3m th\u1ea5y \u00e1p l\u1ef1c v\u1ec1 kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i ngay c\u1ea3 khi ti\u1ec7n \u00edch kh\u00f4ng in ra h\u00ecnh ph\u1ea1t PF ri\u00eang bi\u1ec7t.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00f4ng su\u1ea5t l\u00e0 ph\u1ea7n th\u1ef1c t\u1ebf. \u0110\u1ed9ng c\u01a1, m\u00e1y h\u00e0n, v\u00e0 bi\u1ebfn \u00e1p t\u1ea3i nh\u1eb9 k\u00e9o vars t\u1eeb t\u1eeb c\u1ea3m \u1ee9ng; qu\u00e1 tr\u00ecnh v\u1eabn c\u1ea7n c\u00f9ng m\u1ed9t kW, v\u00ec v\u1eady d\u00e2y d\u1eabn v\u00e0 bi\u1ebfn \u00e1p mang d\u00f2ng \u0111i\u1ec7n th\u1eeba. S\u1eeda ch\u1eefa lo\u1ea1i b\u1ecf vars \u0111\u00f3 gi\u1ea3m nhu c\u1ea7u r\u00f5 r\u00e0ng cho c\u00f9ng m\u1ed9t s\u1ea3n l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u00e3y xem \u201cPF t\u1ed1t\u201d nh\u01b0 m\u1ed9t m\u1ee5c ti\u00eau c\u1ee7a nh\u00e0 m\u00e1y \u0111\u00e3 th\u1ecfa thu\u1eadn v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 ti\u1ec7n \u00edch v\u00e0 h\u1ed3 s\u01a1 t\u1ea3i, kh\u00f4ng ph\u1ea3i m\u1ed9t quy lu\u1eadt chung. Nhi\u1ec1u cu\u1ed9c tr\u00f2 chuy\u1ec7n c\u00f4ng nghi\u1ec7p h\u01b0\u1edbng t\u1edbi g\u1ea7n 0.95, v\u00e0 m\u1ed9t s\u1ed1 ngu\u1ed3n gi\u00e1o d\u1ee5c g\u1ecdi c\u00e1c gi\u00e1 tr\u1ecb th\u1ea5p h\u01a1n l\u00e0 kh\u00f4ng hi\u1ec7u qu\u1ea3 \u1edf nhi\u1ec1u khu v\u1ef1c, nh\u01b0ng ng\u00f4n ng\u1eef trong bi\u1ec3u ph\u00ed c\u1ee7a b\u1ea1n m\u1edbi quy\u1ebft \u0111\u1ecbnh vi\u1ec7c t\u00ednh ph\u00ed.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"when-calculation-needs-true-power-factor-logging\">Khi n\u00e0o c\u1ea7n ghi nh\u1eadt k\u00fd H\u1ec7 s\u1ed1 C\u00f4ng su\u1ea5t th\u1ef1c s\u1ef1 trong t\u00ednh to\u00e1n<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Th\u1eadt so v\u1edbi displacement PF quan tr\u1ecdng khi t\u1ea3i phi tuy\u1ebfn l\u00e0m bi\u1ebfn d\u1ea1ng d\u00f2ng \u0111i\u1ec7n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Displacement PF theo g\u00f3c pha c\u01a1 b\u1ea3n (cos\u03c6). Th\u1eadt PF s\u1eed d\u1ee5ng t\u1ed5ng c\u00f4ng su\u1ea5t th\u1ef1c tr\u00ean t\u1ed5ng c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn, bao g\u1ed3m n\u1ed9i dung h\u00e0i h\u00f2a. Tr\u00ean c\u00e1c \u0111\u01b0\u1eddng c\u1ea5p ngu\u1ed3n s\u1eed d\u1ee5ng nhi\u1ec1u VFD ho\u1eb7c ch\u1ec9nh l\u01b0u, m\u1ed9t ph\u00e9p \u0111o cos\u03c6 s\u1ea1ch c\u00f3 th\u1ec3 tr\u00f4ng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong khi PF th\u1ef1c th\u1ea5p h\u01a1n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">N\u1ebfu ph\u00e9p t\u00ednh th\u1ee7 c\u00f4ng c\u1ee7a b\u1ea1n ch\u1ec9 s\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n c\u01a1 b\u1ea3n, h\u00e3y xem \u0111\u00f3 nh\u01b0 m\u1ed9t \u01b0\u1edbc l\u01b0\u1ee3ng d\u1ef1a tr\u00ean displacement. X\u00e1c nh\u1eadn b\u1eb1ng thi\u1ebft b\u1ecb ghi d\u1eef li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng b\u00e1o c\u00e1o PF th\u1ef1c khi c\u00f3 h\u00e0i h\u00f2a. Ph\u01b0\u01a1ng ph\u00e1p ghi d\u1eef li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong <a href=\"https:\/\/cnbygele.com\/vi\/blog\/displacement-vs-distortion-power-factor-logging\/\">ghi log PF displacement so v\u1edbi distortion<\/a>.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Kh\u00f4ng trung b\u00ecnh c\u00e1c ph\u00e9p \u0111o c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng c\u1ea5p ngu\u1ed3n kh\u00f4ng li\u00ean quan th\u00e0nh m\u1ed9t s\u1ed1 PF c\u1ee7a nh\u00e0 m\u00e1y. T\u00ednh theo \u0111i\u1ec3m \u0111o ph\u00f9 h\u1ee3p v\u1edbi quy\u1ebft \u0111\u1ecbnh b\u1ea1n \u0111ang \u0111\u01b0a ra\u2014k\u1ebft n\u1ed1i ti\u1ec7n \u00edch, b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n ch\u00ednh, ho\u1eb7c \u0111\u01b0\u1eddng c\u1ea5p ngu\u1ed3n c\u1ee7a m\u1ed9t \u0111\u1ed9ng c\u01a1 l\u1edbn.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"when-dynamic-svg-compensation-fits-after-you-calculate-pf\">Khi n\u00e0o ph\u00f9 h\u1ee3p \u0111i\u1ec1u ch\u1ec9nh SVG \u0111\u1ed9ng sau khi b\u1ea1n t\u00ednh PF<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Sau khi b\u1ea1n tin t\u01b0\u1edfng v\u00e0o PF \u0111\u00e3 t\u00ednh, ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p s\u1eeda ch\u1eefa d\u1ef1a tr\u00ean t\u1ed1c \u0111\u1ed9 v\u00e0 t\u1ea7n su\u1ea5t bi\u1ebfn \u0111\u1ed9ng c\u1ee7a nhu c\u1ea7u ph\u1ea3n kh\u00e1ng.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00e1c giai \u0111o\u1ea1n t\u1ee5 \u0111i\u1ec7n c\u1ed1 \u0111\u1ecbnh tr\u00ean <a href=\"https:\/\/cnbygele.com\/vi\/reactive-power-compensator\/\">b\u1ed9 b\u00f9 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng<\/a> trung t\u00e2m v\u1eabn ph\u00f9 h\u1ee3p v\u1edbi t\u1ea3i ch\u1eadm tr\u1ec5 \u1ed5n \u0111\u1ecbnh. C\u00e1c t\u1ea3i c\u00f4ng nghi\u1ec7p bi\u1ebfn \u0111\u1ed5i gi\u1eefa y\u00eau c\u1ea7u ph\u1ea3n kh\u00e1ng c\u1ea3m \u1ee9ng v\u00e0 t\u1ee5 \u0111i\u1ec7n c\u1ea7n ph\u1ea3n \u1ee9ng \u0111i\u1ec7n t\u1eed nhanh h\u01a1n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\"><a href=\"https:\/\/cnbygele.com\/vi\/product\/svg-static-var-generators\/\">M\u00e1y ph\u00e1t bi\u1ebfn t\u1ea7n t\u0129nh SVG c\u1ee7a CNBYG<\/a> cung c\u1ea5p \u0111\u01b0\u1eddng \u0111i \u0111\u1ed9ng \u0111\u00f3. D\u00f2ng series g\u1eafn t\u01b0\u1eddng \u0111\u00e3 c\u00f4ng b\u1ed1 bao g\u1ed3m c\u00e1c t\u00f9y ch\u1ecdn 230 V, 400 V, 500 V, v\u00e0 690 V v\u1edbi c\u00e1c l\u1ef1a ch\u1ecdn dung l\u01b0\u1ee3ng kvar, th\u1eddi gian ph\u1ea3n h\u1ed3i d\u01b0\u1edbi 10 ms, h\u1ec7 s\u1ed1 b\u00f9 tr\u00ean 95%, v\u00e0 hi\u1ec7u su\u1ea5t thi\u1ebft b\u1ecb tr\u00ean 97%, cung c\u1ea5p h\u1ed7 tr\u1ee3 ph\u1ea3n kh\u00e1ng c\u1ea3m \u1ee9ng v\u00e0 t\u1ee5 \u0111i\u1ec7n theo th\u1eddi gian th\u1ef1c \u0111\u1ec3 ch\u1ec9nh s\u1eeda h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"H\u00ecnh \u1ea3nh s\u1ea3n ph\u1ea9m m\u00e1y ph\u00e1t bi\u1ebfn t\u0129nh SVG c\u1ee7a CNBYG \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh y\u1ebfu t\u1ed1 c\u00f4ng su\u1ea5t\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/08\/pf-svg-recommendation-1.webp\" \/><\/figure>\n<p style=\"margin:0 0 16px;line-height:1.7\">S\u1eed d\u1ee5ng \u0111\u01b0\u1eddng \u0111i SVG khi \u0111o PF cho th\u1ea5y dao \u0111\u1ed9ng ph\u1ea3n kh\u00e1ng li\u00ean t\u1ee5c m\u00e0 c\u00e1c ng\u00e2n h\u00e0ng c\u1ed1 \u0111\u1ecbnh kh\u00f4ng th\u1ec3 theo d\u00f5i r\u00f5 r\u00e0ng. Tr\u01b0\u1edbc ti\u00ean h\u00e3y x\u00e1c minh b\u1eb1ng \u0111\u1ed3ng h\u1ed3 \u0111o khi b\u1ea1n ch\u1ec9 c\u00f3 m\u1ed9t \u0111\u01b0\u1eddng c\u1ea5p ngu\u1ed3n \u0111\u1ed9ng c\u01a1 ch\u1eadm tr\u1ec5 \u1ed5n \u0111\u1ecbnh v\u00e0 nhi\u1ec7m v\u1ee5 c\u1ee7a ng\u00e2n h\u00e0ng t\u1ee5 r\u00f5 r\u00e0ng.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">B\u1ecf qua l\u1ef1a ch\u1ecdn SVG cho \u0111\u1ebfn khi PF v\u00e0 bi\u1ebfn \u0111\u1ed9ng t\u1ea3i \u0111\u01b0\u1ee3c ghi l\u1ea1i. C\u00e1c tham s\u1ed1 tr\u00ean trang s\u1ea3n ph\u1ea9m \u1edf tr\u00ean l\u00e0 ph\u1ea1m vi h\u1ed7 tr\u1ee3; kh\u00f4ng coi ch\u00fang nh\u01b0 m\u1ed9t l\u1eddi h\u1ee9a ti\u1ebft ki\u1ec7m h\u00f3a \u0111\u01a1n.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"faqs\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3 style=\"margin:28px 0 12px\">C\u00f4ng th\u1ee9c t\u00ednh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 g\u00ec?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">PF = c\u00f4ng su\u1ea5t th\u1ef1c chia cho c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng, th\u01b0\u1eddng vi\u1ebft l\u00e0 PF = kW \u00f7 kVA khi c\u1ea3 hai gi\u00e1 tr\u1ecb \u0111\u1ec1u s\u1eed d\u1ee5ng \u0111\u01a1n v\u1ecb kilo t\u1eeb c\u00f9ng m\u1ed9t kho\u1ea3ng.<\/p>\n<h3 style=\"margin:28px 0 12px\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i t\u00ednh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1eeb kW v\u00e0 kVA?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Chia s\u1ed1 \u0111\u1ecdc kilowatt cho s\u1ed1 \u0111\u1ecdc kilovolt-ampere. V\u00ed d\u1ee5: 80 kW \u00f7 100 kVA = 0.80 PF.<\/p>\n<h3 style=\"margin:28px 0 12px\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i t\u00ednh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t ba pha t\u1eeb \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng c\u00e2n b\u1eb1ng, t\u00ednh kVA = (\u221a3 \u00d7 \u0111i\u1ec7n \u00e1p gi\u1eefa c\u00e1c d\u00e2y d\u1eabn \u00d7 d\u00f2ng \u0111i\u1ec7n d\u00e2y) \u00f7 1000, sau \u0111\u00f3 chia kW cho gi\u00e1 tr\u1ecb kVA \u0111\u00f3. S\u1eed d\u1ee5ng m\u00e1y ph\u00e2n t\u00edch \u0111o PF th\u1ef1c khi h\u1ec7 th\u1ed1ng kh\u00f4ng c\u00e2n b\u1eb1ng ho\u1eb7c b\u1ecb bi\u1ebfn d\u1ea1ng.<\/p>\n<h3 style=\"margin:28px 0 12px\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i \u01b0\u1edbc l\u01b0\u1ee3ng h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1eeb \u0111\u1ed3ng h\u1ed3 \u0111o n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ti\u1ec7n \u00edch?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ph\u00f9 h\u1ee3p, s\u1eed d\u1ee5ng PF \u2248 kWh \u00f7 kVAh, ho\u1eb7c PF \u2248 kWh \u00f7 \u221a(kWh\u00b2 + kvarh\u00b2) khi c\u00f3 kvarh. Trung b\u00ecnh \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 PF t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m kW \u0111\u1ec9nh \u0111\u01a1n l\u1ebb.<\/p>\n<h3 style=\"margin:28px 0 12px\">H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c coi l\u00e0 t\u1ed1t l\u00e0 g\u00ec?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Nhi\u1ec1u nh\u00e0 m\u00e1y c\u00f4ng nghi\u1ec7p h\u01b0\u1edbng t\u1edbi kho\u1ea3ng 0.95 ho\u1eb7c cao h\u01a1n, v\u00e0 m\u1ed9t s\u1ed1 t\u00e0i li\u1ec7u tham kh\u1ea3o coi c\u00e1c gi\u00e1 tr\u1ecb th\u1ea5p h\u01a1n nh\u01b0 v\u1eady l\u00e0 kh\u00f4ng hi\u1ec7u qu\u1ea3 \u1edf nhi\u1ec1u khu v\u1ef1c. X\u00e1c nh\u1eadn ng\u01b0\u1ee1ng trong bi\u1ec3u ph\u00ed ti\u1ec7n \u00edch v\u00e0 quy \u0111\u1ecbnh k\u1ebft n\u1ed1i c\u1ee7a b\u1ea1n.<\/p>\n<h3 style=\"margin:28px 0 12px\">T\u1ea1i sao h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p l\u1ea1i l\u00e0m t\u0103ng d\u00f2ng \u0111i\u1ec7n?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00f9ng m\u1ed9t kW, PF th\u1ea5p h\u01a1n c\u00f3 ngh\u0129a l\u00e0 kVA cao h\u01a1n, do \u0111\u00f3 d\u00f2ng \u0111i\u1ec7n c\u1ee7a \u0111\u01b0\u1eddng d\u00e2y t\u0103ng l\u00ean. D\u00f2ng \u0111i\u1ec7n t\u0103ng th\u00eam \u0111\u00f3 l\u00e0m t\u0103ng t\u1ed5n th\u1ea5t v\u00e0 gi\u1ea3m \u0111i\u1ec7n \u00e1p m\u00e0 kh\u00f4ng mang l\u1ea1i c\u00f4ng vi\u1ec7c h\u1eefu \u00edch.<\/p>\n<h3 style=\"margin:28px 0 12px\">H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t kh\u00e1c g\u00ec so v\u1edbi c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng (kVAR) l\u00e0 th\u00e0nh ph\u1ea7n vu\u00f4ng g\u00f3c trong h\u00ecnh tam gi\u00e1c c\u00f4ng su\u1ea5t. H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 t\u1ef7 l\u1ec7 c\u1ee7a c\u00f4ng su\u1ea5t th\u1ef1c so v\u1edbi c\u00f4ng su\u1ea5t ph\u1ea3n \u00e1nh; gi\u1ea3m kVAR cho m\u1ed9t kW nh\u1ea5t \u0111\u1ecbnh l\u00e0m t\u0103ng PF.<\/p>\n<h3 style=\"margin:28px 0 12px\">Khi n\u00e0o t\u00f4i n\u00ean nghi ng\u1edd v\u1ec1 ph\u00e9p \u0111o cos\u03c6 \u0111\u01a1n gi\u1ea3n?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Nghi ng\u1edd n\u00f3 tr\u00ean c\u00e1c \u0111\u01b0\u1eddng d\u00e2y phi tuy\u1ebfn n\u01a1i c\u00e1c h\u00e0i h\u00f2a l\u00e0m t\u0103ng c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng. \u01afu ti\u00ean s\u1eed d\u1ee5ng PF th\u1ef1c t\u1eeb b\u1ed9 ghi ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng v\u00e0 so s\u00e1nh v\u1edbi ph\u00e9p t\u00ednh th\u1ee7 c\u00f4ng c\u1ee7a b\u1ea1n.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"references\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ol style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/en.wikipedia.org\/wiki\/Power_factor\" rel=\"nofollow noopener\" target=\"_blank\">H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t \u2014 Wikipedia<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/circuitglobe.com\/power-factor.html\" rel=\"nofollow noopener\" target=\"_blank\">H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, nh\u01b0\u1ee3c \u0111i\u1ec3m &amp; nguy\u00ean nh\u00e2n \u2014 Circuit Globe<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/forums.mikeholt.com\/threads\/determining-power-factor-to-use-for-load-calculation-from-utility-bills.132045\/\" rel=\"nofollow noopener\" target=\"_blank\">X\u00e1c \u0111\u1ecbnh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t \u0111\u1ec3 t\u00ednh t\u1ea3i t\u1eeb h\u00f3a \u0111\u01a1n ti\u1ec7n \u00edch \u2014 Di\u1ec5n \u0111\u00e0n Mike Holt<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/forum.inductiveautomation.com\/t\/plant-power-factor\/10809\" rel=\"nofollow noopener\" target=\"_blank\">Y\u1ebfu t\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a nh\u00e0 m\u00e1y \u2014 Di\u1ec5n \u0111\u00e0n Inductive Automation<\/a><\/li>\n<\/ol>\n<hr \/>\n<p style=\"margin:0 0 16px;line-height:1.7\">Ki\u1ec3m to\u00e1n Humanizer: \u0110\u1eacU \u2014 v\u00f2ng ki\u1ec3m tra th\u1ee9 hai \u0111\u00e3 lo\u1ea1i b\u1ecf ng\u00f4n ng\u1eef meta-process; kh\u00f4ng th\u00eam d\u1eef li\u1ec7u m\u1edbi ngo\u00e0i Nghi\u00ean c\u1ee9u\/T\u00f3m t\u1eaft; ID y\u00eau c\u1ea7u gi\u1eef ngo\u00e0i \u0111o\u1ea1n v\u0103n.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch t\u00ednh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1eeb kW v\u00e0 kVA, d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p ba pha, ho\u1eb7c c\u00e1c thanh ghi n\u0103ng l\u01b0\u1ee3ng, sau \u0111\u00f3 x\u00e1c minh con s\u1ed1 n\u00e0y tr\u01b0\u1edbc khi ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u ch\u1ec9nh cho nh\u00e0 m\u00e1y.<\/p>","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2439","post","type-post","status-publish","format-standard","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"acf":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/comments?post=2439"}],"version-history":[{"count":1,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2439\/revisions"}],"predecessor-version":[{"id":2525,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2439\/revisions\/2525"}],"wp:attachment":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/media?parent=2439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/categories?post=2439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/tags?post=2439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}