{"id":18091,"date":"2014-09-02T16:25:22","date_gmt":"2014-09-02T09:25:22","guid":{"rendered":"https:\/\/banbientan.com\/?p=18091"},"modified":"2014-09-02T16:25:22","modified_gmt":"2014-09-02T09:25:22","slug":"he-so-cong-suat-la-gi","status":"publish","type":"post","link":"https:\/\/hunglong.banbientan.com\/?p=18091","title":{"rendered":"H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 g\u00ec?"},"content":{"rendered":"
\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/span>\u00a0l\u00e0 g\u00ec v\u00e0 \u00fd ngh\u0129a c\u1ee7a n\u00f3? T\u1ea1i sao ta l\u1ea1i n\u00ean n\u00e2ng cao h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cos phi<\/h2>\n

C\u00f4ng su\u1ea5t truy\u1ec1n t\u1eeb ngu\u1ed3n \u0111\u1ebfn t\u1ea3i lu\u00f4n t\u1ed3n t\u1ea1i 2 th\u00e0nh ph\u1ea7n :\u00a0C\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng<\/span>\u00a0v\u00e0\u00a0c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng<\/span>. C\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng \u0111\u1eb7c tr\u01b0ng cho kh\u1ea3 n\u0103ng sinh ra c\u00f4ng h\u1eefu \u00edch c\u1ee7a thi\u1ebft b\u1ecb, \u0111\u01a1n v\u1ecb W ho\u1eb7c kW. V\u00ed d\u1ee5 nh\u01b0 c\u00f4ng su\u1ea5t c\u01a1 (s\u1ee9c k\u00e9o) c\u1ee7a \u0111\u1ed9ng c\u01a1. C\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng kh\u00f4ng sinh ra c\u00f4ng h\u1eefu \u00edch nh\u01b0ng n\u00f3 l\u1ea1i c\u1ea7n thi\u1ebft cho qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng, \u0111\u01a1n v\u1ecb VAR ho\u1eb7c kVAR. C\u00f3 th\u1ec3 hi\u1ec3u n\u00f4m na \u0111\u00f3 l\u00e0 th\u00e0nh ph\u1ea7n t\u1eeb h\u00f3a, t\u1ea1o t\u1eeb tr\u01b0\u1eddng trong qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh c\u00e1c d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng kh\u00e1c, ho\u1eb7c t\u1eeb n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n sang ch\u00ednh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n. C\u00f4ng su\u1ea5t t\u1ed5ng h\u1ee3p cho 2 lo\u1ea1i c\u00f4ng su\u1ea5t tr\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0\u00a0c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn<\/span>, \u0111\u01a1n v\u1ecb VA ho\u1eb7c KVA. Ba lo\u1ea1i c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf tr\u00ean l\u1ea1i c\u00f3 m\u1ed9t m\u1ed1i quan h\u1ec7 m\u1eadt thi\u1ebft v\u1edbi nhau th\u00f4ng qua tam gi\u00e1c c\u00f4ng su\u1ea5t nh\u01b0 h\u00ecnh sau:
\n\"tam_giac_cong_suat\"<\/a>
\nH\u00ecnh 1 : tam gi\u00e1c c\u00f4ng su\u1ea5t<\/p>\n

\u00dd ngh\u0129a c\u1ee7a h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/h2>\n

N\u1ebfu x\u00e9t tr\u00ean ph\u01b0\u01a1ng di\u1ec7n ngu\u1ed3n cung c\u1ea5p (m\u00e1y ph\u00e1t \u0111i\u1ec7n ho\u1eb7c m\u00e1y bi\u1ebfn \u00e1p). R\u00f5 r\u00e0ng c\u00f9ng m\u1ed9t dung l\u01b0\u1ee3ng m\u00e1y bi\u1ebfn \u00e1p ho\u1eb7c c\u00f4ng su\u1ea5t c\u1ee7a m\u00e1y ph\u00e1t \u0111i\u1ec7n (t\u00ednh b\u1eb1ng KVA). H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u00e0ng cao th\u00ec th\u00e0nh ph\u1ea7n c\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng c\u00e0ng cao v\u00e0 m\u00e1y s\u1ebd sinh ra \u0111\u01b0\u1ee3c nhi\u1ec1u c\u00f4ng h\u1eefu \u00edch. S\u1ebd c\u00f3 ng\u01b0\u1eddi n\u00f3i “N\u1ebfu v\u1eady t\u1ea1i sao ta ta kh\u00f4ng duy tr\u00ec cos phi ~ 1 \u0111\u1ec3 m\u00e1y ph\u00e1t ho\u1eb7c m\u00e1y bi\u1ebfn \u00e1p ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3”. S\u1ef1 th\u1eadt l\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t bao nhi\u00eau ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea3i (thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng \u0111i\u1ec7n). Nhu c\u1ea7u c\u1ee7a t\u1ea3i v\u1ec1 c\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng v\u00e0 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng c\u1ea7n ph\u1ea3n \u0111\u00e1p \u1ee9ng \u0111\u1ee7 th\u00ec t\u1ea3i m\u1edbi ho\u1ea1t \u0111\u1ed9ng t\u1ed1t. Gi\u1ea3i ph\u00e1p trung h\u00f2a h\u01a1n l\u00e0 ngu\u1ed3n s\u1ebd ch\u1ec9 cung c\u1ea5p cho t\u1ea3i 1 ph\u1ea7n c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng, ph\u1ea7n thi\u1ebfu c\u00f2n l\u1ea1i, kh\u00e1ch h\u00e0ng t\u1ef1 trang b\u1ecb th\u00eam b\u1eb1ng c\u00e1ch g\u1eafn th\u00eam t\u1ee5 b\u00f9.
\nN\u1ebfu x\u00e9t \u1edf ph\u01b0\u01a1ng di\u1ec7n \u0111\u01b0\u1eddng d\u00e2y truy\u1ec1n t\u1ea3i ta l\u1ea1i quan t\u00e2m \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n truy\u1ec1n tr\u00ean \u0111\u01b0\u1eddng d\u00e2y. D\u00f2ng \u0111i\u1ec7n n\u00e0y s\u1ebd l\u00e0m n\u00f3ng d\u00e2y v\u00e0 t\u1ea1o ra m\u1ed9t l\u01b0\u1ee3ng s\u1ee5t \u00e1p tr\u00ean \u0111\u01b0\u1eddng d\u00e2y truy\u1ec1n t\u1ea3i.
\nN\u1ebfu x\u00e9t trong h\u1ec7 th\u1ed1ng 1 pha, c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c : S=U*I
\nN\u1ebfu x\u00e9t trong h\u1ec7 th\u1ed1ng 3 pha, c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c : S=c\u0103n(3)U*I , U l\u00e0 \u0111i\u1ec7n \u00e1p d\u00e2y, I l\u00e0 d\u00f2ng \u0111i\u1ec7n d\u00e2y.
\nC\u1ea3 trong l\u01b0\u1edbi 1 pha v\u00e0 3 pha \u0111\u1ec1u cho th\u1ea5y d\u00f2ng \u0111i\u1ec7n t\u1ec9 l\u1ec7 v\u1edbi c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn S. V\u1ea5n \u0111\u1ec1 l\u00e0 c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn l\u00e0 do 2 th\u00e0nh ph\u1ea7n c\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng v\u00e0 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng g\u1ed9p l\u1ea1i t\u1ea1o n\u00ean. T\u1eeb \u0111\u00f3 ta c\u00f3 2 nh\u1eadn x\u00e9t:
\nM\u1ed9t l\u00e0 : n\u1ebfu nh\u01b0 c\u00f9ng 1 t\u1ea3i, n\u1ebfu ta trang b\u1ecb t\u1ee5 b\u00f9 \u0111\u1ec3 ph\u00e1t c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng ngay t\u1ea1i t\u1ea3i, \u0111\u01b0\u1eddng d\u00e2y ch\u1ec9 chuy\u1ec3n t\u1ea3i d\u00f2ng \u0111i\u1ec7n c\u1ee7a c\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng th\u00ec ch\u1eafc ch\u1eafn \u0111\u01b0\u1eddng d\u00e2y s\u1ebd m\u00e1t h\u01a1n.
\nHai l\u00e0 : N\u1ebfu ta ch\u1ea5p nh\u1eadn \u0111\u01b0\u1eddng d\u00e2y ph\u00e1t nhi\u1ec7t \u1edf m\u1ee9c hi\u1ec7n t\u1ea1i, v\u00e0 n\u1ebfu ta trang b\u1ecb t\u1ee5 b\u00f9 ph\u00e1t c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng \u1edf t\u1ea1i t\u1ea3i, ta c\u00f3 th\u1ec3 b\u1eaft \u0111\u01b0\u1eddng d\u00e2y t\u1ea3i nhi\u1ec1u h\u01a1n hi\u1ec7n nay m\u1ed9t \u00edt.
\nTr\u00ean \u0111\u00e2y \u0111\u00e3 tr\u00ecnh b\u00e0y v\u1ec1 \u00fd ngh\u0129a c\u1ee7a h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cos phi. Nh\u1eefng b\u00e0i sau s\u1ebd tr\u00ecnh b\u00e0y th\u00eam \u00fd ngh\u0129a c\u1ee7a vi\u1ec7c n\u00e2ng cao h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cos phi, ph\u00e2n t\u00edch s\u1ef1 c\u1ea7n thi\u1ebft hay kh\u00f4ng c\u1ea7n b\u00f9???<\/p><\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t\u00a0l\u00e0 g\u00ec v\u00e0 \u00fd ngh\u0129a c\u1ee7a n\u00f3? T\u1ea1i sao ta l\u1ea1i n\u00ean n\u00e2ng cao h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cos phi C\u00f4ng su\u1ea5t truy\u1ec1n t\u1eeb ngu\u1ed3n \u0111\u1ebfn t\u1ea3i lu\u00f4n t\u1ed3n t\u1ea1i 2 th\u00e0nh ph\u1ea7n :\u00a0C\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng\u00a0v\u00e0\u00a0c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng. C\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng \u0111\u1eb7c tr\u01b0ng cho kh\u1ea3 n\u0103ng sinh ra c\u00f4ng […]<\/p>\n","protected":false},"author":2,"featured_media":18092,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11499],"tags":[12837,12838],"class_list":["post-18091","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc-tu-dong-hoa","tag-cos-phi","tag-he-so-cong-suat-la-gi"],"_links":{"self":[{"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/wp\/v2\/posts\/18091","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18091"}],"version-history":[{"count":0,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/wp\/v2\/posts\/18091\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18091"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18091"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18091"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}