{"id":8368,"date":"2012-08-25T12:41:40","date_gmt":"2012-08-25T05:41:40","guid":{"rendered":"https:\/\/banbientan.com\/?p=8368"},"modified":"2012-08-25T12:41:40","modified_gmt":"2012-08-25T05:41:40","slug":"cac-giai-phap-tiet-kiem-dien-doi-voi-dong-co-khong-dong-bo","status":"publish","type":"post","link":"https:\/\/hunglong.banbientan.com\/?p=8368","title":{"rendered":"C\u00e1c gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m \u0111i\u1ec7n \u0111\u1ed1i v\u1edbi \u0111\u1ed9ng c\u01a1 kh\u00f4ng \u0111\u1ed3ng b\u1ed9"},"content":{"rendered":"

PGS. L\u00ea V\u0103n Doanh\u00a0<\/strong>\u0110H B\u00e1ch Khoa \u2013 HN<\/strong>
\n\u0110\u1ed9ng c\u01a1 kh\u00f4ng \u0111\u1ed3ng b\u1ed9 (\u0110CK\u0110B) c\u00f3 c\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n, v\u1eadn h\u00e0nh ch\u1eafc ch\u1eafn n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u1ef1c t\u1ebf. T\u1eeb c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb \u0111i\u1ec7n gia d\u1ee5ng nh\u01b0 qu\u1ea1t \u0111i\u1ec7n, m\u00e1y \u0111i\u1ec1u h\u00f2a nhi\u1ec7t \u0111\u1ed9\u2026 \u0111\u1ebfn c\u00e1c \u0111\u1ed9ng c\u01a1 truy\u1ec1n \u0111\u1ed9ng m\u00e1y c\u00f4ng c\u1ee5, m\u00e1y n\u00e2ng chuy\u1ec3n, d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t \u0111\u00e2u \u0111\u00e2u c\u0169ng c\u00f3 m\u1eb7t \u0110CK\u0110B. Ch\u00fang c\u00f3 c\u00f4ng su\u1ea5t t\u1eeb v\u00e0i W \u0111\u1ebfn v\u00e0i ngh\u00ecn kW. Tr\u00ean 50% \u0111i\u1ec7n n\u0103ng s\u1ea3n xu\u1ea5t c\u1ee7a th\u1ebf gi\u1edbi do \u0110CK\u0110B ti\u00eau th\u1ee5.
\n\"\"<\/a>
\nTheo t\u00ednh to\u00e1n trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a \u0110CK\u0110B ti\u1ec1n \u0111i\u1ec7n chi\u1ebfm t\u1edbi 96% trong khi \u0111\u00f3 chi ph\u00ed mua \u0111\u1ed9ng c\u01a1 v\u00e0 b\u1ea3o d\u01b0\u1ee1ng ch\u1ec9 chi\u1ebfm 4% ! V\u1ea5n \u0111\u1ec1 thi\u1ebft k\u1ebf ch\u1ebf t\u1ea1o, v\u1eadn h\u00e0nh s\u1eed d\u1ee5ng \u0110CK\u0110B c\u00f3 \u00fd ngh\u0129a quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng \u0111i\u1ec7n n\u0103ng ti\u1ebft ki\u1ec7m v\u00e0 hi\u1ec7u qu\u1ea3. Ng\u00e0y nay h\u1ec7 truy\u1ec1n \u0111\u1ed9ng Bi\u1ebfn t\u1ea7n \u2013 \u0110CK\u0110B ng\u00e0y c\u00e0ng chi\u1ebfm \u01b0u th\u1ebf.
\nSau \u0111\u00e2y ch\u00fang t\u00f4i xin gi\u1edbi thi\u1ec7u ti\u1ec1m n\u0103ng ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng \u0111\u1ed1i v\u1edbi lo\u1ea1i \u0111\u1ed9ng c\u01a1 n\u00e0y.
\n1. Thi\u1ebft k\u1ebf ch\u1ebf t\u1ea1o \u0111\u1ed9ng c\u01a1 c\u00f3 hi\u1ec7u su\u1ea5t cao<\/strong>
\nC\u00f3 hai lo\u1ea1i \u0110CK\u0110B: \u0111\u1ed9ng c\u01a1 r\u00f4to l\u1ed3ng s\u00f3c v\u00e0 \u0111\u1ed9ng c\u01a1 r\u00f4to d\u00e2y qu\u1ea5n. Trong \u0111\u1ed9ng c\u01a1 r\u00f4to d\u00e2y qu\u1ea5n nh\u1edd th\u00eam \u0111i\u1ec7n tr\u1edf ph\u1ee5 v\u00e0o m\u1ea1ch r\u00f4to n\u00ean c\u00f3 th\u1ec3 gi\u1ea3m d\u00f2ng \u0111i\u1ec7n m\u1edf m\u00e1y v\u00e0 \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 nh\u01b0ng gi\u00e1 th\u00e0nh cao h\u01a1n lo\u1ea1i \u0111\u1ed9ng c\u01a1 r\u00f4to l\u1ed3ng s\u00f3c c\u00f9ng c\u00f4ng su\u1ea5t 2 l\u1ea7n. Do t\u1ed5n hao c\u00f4ng su\u1ea5t trong m\u1ea1ch t\u1eeb (t\u1ed5n hao s\u1eaft), trong d\u00e2y qu\u1ea5n (t\u1ed5n hao \u0111\u1ed3ng) v\u00e0 c\u00e1c lo\u1ea1i t\u1ed5n hao c\u01a1 kh\u00ed tr\u00ean \u1ed5 tr\u1ee5c, qu\u1ea1t gi\u00f3\u2026 hi\u1ec7u su\u1ea5t \u0111\u1ecbnh m\u1ee9c c\u1ee7a \u0110CK\u0110B th\u00f4ng d\u1ee5ng kho\u1ea3ng 90%.
\n\u0110CK\u0110B hi\u1ec7u su\u1ea5t cao c\u00f3 k\u00edch th\u01b0\u1edbc t\u00e1c d\u1ee5ng (ti\u1ebft di\u1ec7n l\u00f5i th\u00e9p, ti\u1ebft di\u1ec7n d\u00e2y qu\u1ea5n) l\u1edbn h\u01a1n \u0111\u1ed9ng c\u01a1 th\u00f4ng d\u1ee5ng. \u0110\u1ed9ng c\u01a1 s\u1eed d\u1ee5ng l\u00e1 th\u00e9p k\u1ef9 thu\u1eadt \u0111i\u1ec7n c\u00f3 su\u1ea5t t\u1ed5n hao th\u1ea5p, h\u1ec7 s\u1ed1 l\u1ea5p \u0111\u1ea7y r\u00e3nh cao h\u01a1n, khe h\u1edf kh\u00f4ng kh\u00ed \u0111\u1ee7 nh\u1ecf, l\u1ed3ng s\u00f3c r\u00f4to b\u1eb1ng \u0111\u1ed3ng, dung sai ch\u1ebf t\u1ea1o nh\u1ecf h\u01a1n \u0111\u1ed9ng c\u01a1 th\u00f4ng d\u1ee5ng.
\nV\u1ec1 thi\u1ebft k\u1ebf t\u00ednh to\u00e1n t\u1ed1i \u01b0u m\u1ea1ch t\u1eeb, m\u1ea1ch \u0111i\u1ec7n, t\u1ed1i \u01b0u k\u00edch th\u01b0\u1edbc r\u0103ng r\u00e3nh \u0111\u1ec3 ph\u00e2n b\u1ed1 \u0111\u1ec1u m\u1eadt \u0111\u1ed9 t\u1eeb th\u00f4ng \u1edf g\u00f4ng v\u00e0 r\u0103ng r\u00f4to v\u00e0 stato. V\u1ec1 c\u00f4ng ngh\u1ec7 ch\u1ebf t\u1ea1o s\u1eed d\u1ee5ng khu\u00f4n d\u1eadp ch\u00ednh x\u00e1c, m\u00e1y d\u1eadp t\u00f4n c\u00f4ng su\u1ea5t l\u1edbn, c\u00e2n b\u1eb1ng \u0111\u1ed9ng r\u00f4to ch\u00ednh x\u00e1c, m\u00e1y qu\u1ea5n d\u00e2y t\u1ef1 \u0111\u1ed9ng.
\nC\u00e1c n\u01b0\u1edbc quy \u0111\u1ecbnh ti\u00eau chu\u1ea9n hi\u1ec7u su\u1ea5t cho \u0111\u1ed9ng c\u01a1 v\u1edbi \u01b0u ti\u00ean \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao. V\u00ed d\u1ee5 Hoa k\u1ef3 c\u00f3 ti\u00eau chu\u1ea9n EPAct efficiency standards. \u1ee6y ban K\u1ef9 thu\u1eadt \u0111i\u1ec7n qu\u1ed1c t\u1ebf c\u00f3 ti\u00eau chu\u1ea9n IEC 34-2. Trung Qu\u1ed1c c\u00f3 ti\u00eau chu\u1ea9n \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao Y2 v\u00e0 Y2e series. Nh\u1eadt b\u1ea3n c\u00f3 ti\u00eau chu\u1ea9n JEC 37 v\u00e0 JISC 4212:2000 High efficiency induction motors\u2026
\n\u1ede Vi\u1ec7t Nam B\u1ed9 Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 \u0111\u00e3 ban h\u00e0nh b\u1ed9 Ti\u00eau chu\u1ea9n \u0110CK\u0110B ba pha r\u00f4to l\u1ed3ng s\u00f3c hi\u1ec7u su\u1ea5t cao TCVN 7540-1:2005 y\u00eau c\u1ea7u hi\u1ec7u su\u1ea5t t\u1ed1i thi\u1ec3u c\u1ee7a \u0110CK\u0110B r\u00f4to l\u1ed3ng s\u00f3c \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o ph\u1ea3i cao h\u01a1n Ti\u00eau chu\u1ea9n s\u1eed d\u1ee5ng tr\u01b0\u1edbc \u0111\u00e2y (TCVN 1987-1994) t\u1eeb 1 \u0111\u1ebfn 5 % .
\nT\u1ea1i Vi\u1ec7t Nam ch\u1ec9 ri\u00eang C\u00f4ng ty Ch\u1ebf t\u1ea1o \u0110i\u1ec7n c\u01a1 H\u00e0 N\u1ed9i h\u00e0ng n\u0103m s\u1ea3n xu\u1ea5t h\u01a1n 35.000 \u0111\u1ed9ng c\u01a1. N\u1ebfu gi\u1ea3 thi\u1ebft n\u00e2ng cao \u0111\u01b0\u1ee3c 1 % hi\u1ec7u su\u1ea5t c\u1ee7a \u0110CK\u0110B th\u00ec trong s\u1ed1 \u0111i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 n\u0103m 2008 c\u1ee7a Vi\u1ec7t Nam l\u00e0 70 t\u1ef7 kWh, 50 % l\u00e0 \u0111i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 c\u1ee7a c\u00e1c \u0110CK\u0110B v\u00e0 s\u01a1 b\u1ed9 l\u1ea5y ti\u1ec1n \u0111i\u1ec7n kinh doanh 1 kWh l\u00e0 1725 \u0111\u1ed3ng th\u00ec s\u1ed1 ti\u1ec1n \u0111i\u1ec7n ti\u1ebft ki\u1ec7m do \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t n\u00e2ng cao th\u00eam 1 % l\u00e0:
\n35 t\u1ef7 x 0,01 x 1725 = 603,75 t\u1ef7 \u0111\u1ed3ng.
\nT\u1ea1i c\u00e1c n\u01b0\u1edbc EU \u0110CK\u0110B hi\u1ec7u su\u1ea5t cao c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m 202 t\u1ef7 kWh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 10 t\u1ef7 Euro.
\nIEC quy \u0111\u1ecbnh hi\u1ec7u su\u1ea5t cho \u0111\u1ed9ng c\u01a1 theo 2 lo\u1ea1i hi\u1ec7u su\u1ea5t cao EFF1, \u0111\u1ed9ng c\u01a1 c\u00f3 hi\u1ec7u su\u1ea5t ti\u00eau chu\u1ea9n EFF2 \u0111\u01b0\u1ee3c cho trong b\u1ea3ng 1 sau \u0111\u00e2y:
\n\"\"<\/a>
\nB\u1ea3ng 1 Hi\u1ec7u su\u1ea5t c\u1ee7a \u0110CK\u0110B ti\u00eau chu\u1ea9n v\u00e0 \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao<\/em><\/strong>
\n2. Ti\u1ebft ki\u1ec7m \u0111i\u1ec7n cho \u0110CK\u0110B b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng\u00a0bi\u1ebfn t\u1ea7n<\/a><\/span><\/strong><\/strong>
\nN\u1ebfu \u0110CK\u0110B n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi l\u01b0\u1edbi (h\u00ecnh 1a) khi c\u00f4ng su\u1ea5t c\u01a1 c\u1ee7a t\u1ea3i thay \u0111\u1ed5i th\u00ec c\u00f4ng su\u1ea5t \u0111i\u1ec7n c\u1ee7a \u0111\u1ed9ng c\u01a1 h\u1ea7u nh\u01b0 kh\u00f4ng \u0111\u1ed5i, n\u0103ng l\u01b0\u1ee3ng b\u1ecb ti\u00eau hao tr\u00ean c\u00e1c van ti\u1ebft l\u01b0u. Khi s\u1eed d\u1ee5ng h\u1ec7 truy\u1ec1n \u0111\u1ed9ng c\u00f3 t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i nh\u1edd bi\u1ebfn t\u1ea7n (h\u00ecnh 1b) khi l\u01b0u l\u01b0\u1ee3ng c\u1ee7a t\u1ea3i gi\u1ea3m th\u00ec c\u00f4ng su\u1ea5t \u0111i\u1ec7n c\u1ee7a \u0111\u1ed9ng c\u01a1 gi\u1ea3m theo \u0111\u01b0\u1eddng b\u1eadc 3 nh\u01b0 h\u00ecnh 2. V\u00ec v\u1eady khi l\u01b0u l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft b\u1eb1ng 80% th\u00ec c\u00f4ng su\u1ea5t \u0111i\u1ec7n c\u1ee7a \u0111\u1ed9ng c\u01a1 b\u00e2y gi\u1edd b\u1eb1ng = 51% , ngh\u0129a l\u00e0 ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c 49% \u0111i\u1ec7n n\u0103ng.
\n\"\"<\/a>
\nH\u00ecnh 1 H\u1ec7 truy\u1ec1n \u0111\u1ed9ng \u0111i\u1ec7n
\n<\/strong><\/em>a) Truy\u1ec1n \u0111\u1ed9ng t\u1ed1c \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i b) Truy\u1ec1n \u0111\u1ed9ng t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i nh\u1edd bi\u1ebfn t\u1ea7n<\/em>
\n\"\"<\/a><\/p>\n\n\n\n
H\u00ecnh 2 Quan h\u1ec7 c\u00f4ng su\u1ea5t, l\u01b0u l\u01b0\u1ee3ng, \u00e1p su\u1ea5t theo t\u1ed1c \u0111\u1ed9<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

V\u1ec1 c\u1ea5u t\u1ea1o bi\u1ebfn t\u1ea7n gi\u00e1n ti\u1ebfp g\u1ed3m b\u1ed9 ch\u1ec9nh l\u01b0u bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n \u00e1p t\u1ea7n s\u1ed1 l\u01b0\u1edbi f1 th\u00e0nh \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u. Qua m\u1ea1ch m\u1ed9t chi\u1ec1u trung gian \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c l\u1ecdc, ti\u1ebfp theo l\u00e0 m\u1ea1ch ngh\u1ecbch l\u01b0u IGBT bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u th\u00e0nh \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u t\u1ea7n s\u1ed1 f2. M\u1ea1ch \u0111\u1ea7u v\u00e0o c\u00f3 b\u1ed9 l\u1ecdc nhi\u1ec5u EMC, t\u1ea5t c\u1ea3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng vi x\u1eed l\u00fd nh\u01b0 h\u00ecnh 3.
\n\"\"<\/a>
\nHi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng c\u1ee7a c\u00e1c b\u1ed9 bi\u1ebfn t\u1ea7n r\u1ea5t cao v\u00ec s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 linh ki\u1ec7n b\u00e1n d\u1eabn c\u00f4ng su\u1ea5t hi\u1ec7n \u0111\u1ea1i. B\u1ed9 bi\u1ebfn t\u1ea7n l\u00e0m vi\u1ec7c theo nguy\u00ean l\u00fd thay \u0111\u1ed5i t\u1ea7n s\u1ed1 (\u0111\u1ed3ng th\u1eddi thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p theo quan h\u1ec7 U\/f kh\u00f4ng \u0111\u1ed5i) \u0111\u1ea3m b\u1ea3o m\u00f4 men kh\u1edfi \u0111\u1ed9ng \u0111\u1ee7 l\u1edbn h\u01a1n m\u00f4 men t\u1ea3i ngay c\u1ea3 khi \u1edf t\u1ed1c \u0111\u1ed9 r\u1ea5t th\u1ea5p. \u0110\u1ed3ng th\u1eddi d\u00f2ng \u0111i\u1ec7n \u0111\u01b0a v\u00e0o \u0111\u1ed9ng c\u01a1 kh\u00f4ng t\u0103ng, do ph\u1ed1i h\u1ee3p gi\u1eefa \u0111i\u1ec7n \u00e1p v\u00e0 t\u1ea7n s\u1ed1 \u0111\u1ec3 gi\u1eef cho t\u1eeb th\u00f4ng \u0111\u1ee7 \u0111\u1ec3 sinh m\u00f4 men.
\nD\u00f2ng kh\u1edfi \u0111\u1ed9ng l\u1edbn nh\u1ea5t c\u1ee7a h\u1ec7 truy\u1ec1n \u0111\u1ed9ng bi\u1ebfn t\u1ea7n ch\u1ec9 b\u1eb1ng d\u00f2ng \u0111\u1ecbnh m\u1ee9c, v\u00ec v\u1eady kh\u00f4ng l\u00e0m s\u1ee5t \u00e1p l\u01b0\u1edbi khi kh\u1edfi \u0111\u1ed9ng, \u0111\u1ea3m b\u1ea3o c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng v\u00e0 ti\u1ebft ki\u1ec7m \u0111i\u1ec7n n\u0103ng khi kh\u1edfi \u0111\u1ed9ng.
\nV\u1edbi nh\u1eefng \u1ee9ng d\u1ee5ng \u0111\u1eb7c t\u00ednh t\u1ea3i thay \u0111\u1ed5i, nh\u01b0 truy\u1ec1n \u0111\u1ed9ng b\u0103ng t\u1ea3i, khi non t\u1ea3i \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng non t\u1ea3i hi\u1ec7u su\u1ea5t th\u1ea5p. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y bi\u1ebfn t\u1ea7n gi\u1ea3m \u0111i\u1ec7n \u00e1p \u0111\u1eb7t v\u00e0o \u0111\u1ed9ng c\u01a1, l\u00e0m t\u0103ng h\u1ec7 s\u1ed1 cos\u03c6 (th\u01b0\u1eddng kho\u1ea3ng 0,96), t\u0103ng hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng \u0111i\u1ec7n, gi\u1ea3m t\u1ed5n th\u1ea5t cho l\u01b0\u1edbi. Bi\u1ebfn t\u1ea7n \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 cho ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u t\u1ea3i th\u1ef1c t\u1ebf, t\u1ed1i \u01b0u \u0111\u01b0\u1ee3c vi\u1ec7c s\u1eed d\u1ee5ng \u0111i\u1ec7n n\u0103ng. Bi\u1ebfn t\u1ea7n \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c d\u1ea3i c\u00f4ng su\u1ea5t r\u1ed9ng, \u0111\u1eb7c t\u00ednh m\u00f4men thay \u0111\u1ed5i c\u0169ng nh\u01b0 c\u1ed1 \u0111\u1ecbnh, ph\u00f9 h\u1ee3p v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n trong c\u00f4ng nghi\u1ec7p. C\u00e1c bi\u1ebfn t\u1ea7n \u0111\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u00f3 b\u1ed9 l\u1ecdc nhi\u1ec5u t\u1ea7n s\u1ed1 radio, t\u01b0\u01a1ng th\u00edch v\u1edbi chu\u1ea9n EN55011\/1A (c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1eafp \u0111\u1eb7t \u1edf b\u1ea5t k\u1ef3 n\u01a1i n\u00e0o, kh\u00f4ng g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c c\u1ee7a c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed tin h\u1ecdc, vi\u1ec5n th\u00f4ng kh\u00e1c trong d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t), thi\u1ebft k\u1ebf th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi s\u1eed d\u1ee5ng, d\u1ec5 d\u00e0ng l\u1eafp \u0111\u1eb7t, c\u00e0i \u0111\u1eb7t v\u00e0 v\u1eadn h\u00e0nh.
\nKinh nghi\u1ec7m cho th\u1ea5y trong \u0111a s\u1ed1 tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed9ng c\u01a1 k\u00e8m theo bi\u1ebfn t\u1ea7n c\u00f3 th\u1ec3 gi\u1ea3m 35% \u0111i\u1ec7n n\u0103ng ti\u00eau th\u1ee5, v\u00ec th\u1ebf h\u1ec7 truy\u1ec1n \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 kh\u00f4ng \u0111\u1ed3ng b\u1ed9 r\u00f4to l\u1ed3ng s\u00f3c k\u00e8m theo bi\u1ebfn t\u1ea7n tr\u1edf n\u00ean r\u1ea5t th\u00f4ng d\u1ee5ng.
\nV\u00ed d\u1ee5: x\u00e9t m\u1ed9t b\u01a1m ly t\u00e2m c\u00f4ng su\u1ea5t 30 kW l\u00e0m vi\u1ec7c 10 gi\u1edd\/ng\u00e0y, 250 ng\u00e0y\/n\u0103m (2500 gi\u1edd\/n\u0103m) theo chu tr\u00ecnh:
\n25% th\u1eddi gian (625 gi\u1edd) v\u1edbi 100% l\u01b0u l\u01b0\u1ee3ng
\n50% th\u1eddi gian (1250 gi\u1edd) v\u1edbi 90% l\u01b0u l\u01b0\u1ee3ng
\n25% th\u1eddi gian (625 gi\u1edd) v\u1edbi 80% l\u01b0u l\u01b0\u1ee3ng.
\n\u0110i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 khi kh\u00f4ng s\u1eed d\u1ee5ng bi\u1ebfn t\u1ea7n:
\n30 kW x 2500h = 75000 kWh
\n\u0110i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 khi s\u1eed d\u1ee5ng bi\u1ebfn t\u1ea7n:
\n30 kW x 1 x 625 h = 18750 kWh
\n30 kW x (0.9)3 x 1250 h = 19200 kWh
\n30 kW x (0.8)3 x 625 h = 4050 kWh
\nT\u1ed5ng c\u1ed9ng = 42.000 kWh
\nNh\u01b0 v\u1eady \u0111i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 trong tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng bi\u1ebfn t\u1ea7n ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c 44% so v\u1edbi tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng s\u1eed d\u1ee5ng bi\u1ebfn t\u1ea7n (42MWh so v\u1edbi 75 MWh).
\nTr\u00ean th\u1ecb tr\u01b0\u1eddng th\u01b0\u1eddng g\u1eadp bi\u1ebfn t\u1ea7n c\u1ee7a c\u00e1c h\u00e3ng n\u1ed5i ti\u1ebfng nh\u01b0 MCD c\u1ee7a Danfoss, ACS c\u1ee7a ABB, Siemens:MICROMASTER (MM420, MM430, MM440), SINAMICS(G110, G120, G130,G150),Yaskawa F7, Yaskawa V1000\u2026.
\nALTIVAR c\u1ee7a Schneider:
\n3. L\u1ef1a ch\u1ecdn \u0111\u1ed9ng c\u01a1 c\u00f3 c\u00f4ng su\u1ea5t th\u00edch h\u1ee3p<\/strong>
\nL\u1ef1a ch\u1ecdn \u0111\u1ed9ng c\u01a1 c\u00f3 c\u00f4ng su\u1ea5t th\u00edch h\u1ee3p tr\u00e1nh v\u1eadn h\u00e0nh non t\u1ea3i. Khi \u0111\u1ed9ng c\u01a1 non t\u1ea3i h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t v\u00e0 cosj gi\u1ea3m r\u00f5 r\u1ec7t. V\u00ed d\u1ee5 m\u1ed9t \u0111\u1ed9ng c\u01a1 khi mang t\u1ea3i 100% c\u00f3 cosj = 0,8 th\u00ec khi mang t\u1ea3i 50% \u2013 cosj = 0,65, mang t\u1ea3i 30% \u2013 cosj = 0,51. V\u00ec v\u1eady vi\u1ec7c thay c\u00e1c \u0111\u1ed9ng c\u01a1 th\u01b0\u1eddng xuy\u00ean l\u00e0m vi\u1ec7c non t\u1ea3i b\u1eb1ng c\u00e1c \u0111\u1ed9ng c\u01a1 c\u00f3 c\u00f4ng su\u1ea5t nh\u1ecf h\u01a1n s\u1ebd n\u00e2ng \u0111\u01b0\u1ee3c h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cho thi\u1ebft b\u1ecb l\u00e0m gi\u1ea3m t\u1ed5n hao trong h\u1ec7 th\u1ed1ng c\u0169ng nh\u01b0 b\u1ea3n th\u00e2n \u0111\u1ed9ng c\u01a1.
\n\"\"<\/a><\/p>\n\n\n\n
B\u1ea3ng 2 Hi\u1ec7u qu\u1ea3 c\u1ee7a vi\u1ec7c \u0111\u1ed5i n\u1ed1i tam gi\u00e1c sang sao<\/em><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4. Gi\u1ea3m \u0111i\u1ec7n \u00e1p \u1edf nh\u1eefng \u0111\u1ed9ng c\u01a1 th\u01b0\u1eddng xuy\u00ean l\u00e0m vi\u1ec7c non t\u1ea3i<\/strong>
\nKhi kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng thay c\u00e1c \u0111\u1ed9ng c\u01a1 th\u01b0\u1eddng xuy\u00ean l\u00e0m vi\u1ec7c non t\u1ea3i b\u1eb1ng c\u00e1c \u0111\u1ed9ng c\u01a1 c\u00f3 c\u00f4ng su\u1ea5t nh\u1ecf h\u01a1n c\u00f3 th\u1ec3 gi\u1ea3m \u0111i\u1ec7n \u00e1p \u1edf c\u00e1c \u0111\u1ed9ng c\u01a1 b\u1eb1ng c\u00e1ch: \u0110\u1ed5i n\u1ed1i tam gi\u00e1c sang sao; ph\u00e2n \u0111o\u1ea1n c\u00e1c qu\u1eadn d\u00e2y stato; chuy\u1ec3n \u0111\u1ed5i \u0111\u1ea7u ph\u00e2n \u00e1p c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p. Hi\u1ec7u qu\u1ea3 c\u1ee7a vi\u1ec7c \u0111\u1ed5i n\u1ed1i tam gi\u00e1c sang sao khi \u0111\u1ed9ng c\u01a1 l\u00e0m vi\u1ec7c non t\u1ea3i trong b\u1ea3ng 2:
\nS\u1ed1 105 (6\/2009)\u2666T\u1ef1 \u0111\u1ed9ng h\u00f3a ng\u00e0y nay<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

PGS. L\u00ea V\u0103n Doanh\u00a0\u0110H B\u00e1ch Khoa \u2013 HN \u0110\u1ed9ng c\u01a1 kh\u00f4ng \u0111\u1ed3ng b\u1ed9 (\u0110CK\u0110B) c\u00f3 c\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n, v\u1eadn h\u00e0nh ch\u1eafc ch\u1eafn n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u1ef1c t\u1ebf. T\u1eeb c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb \u0111i\u1ec7n gia d\u1ee5ng nh\u01b0 qu\u1ea1t \u0111i\u1ec7n, m\u00e1y \u0111i\u1ec1u h\u00f2a nhi\u1ec7t \u0111\u1ed9\u2026 \u0111\u1ebfn c\u00e1c \u0111\u1ed9ng c\u01a1 truy\u1ec1n \u0111\u1ed9ng m\u00e1y […]<\/p>\n","protected":false},"author":2,"featured_media":8369,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[48,8656,10893,10298,10299,10300,10894,10891,10895,10896],"class_list":["post-8368","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cau-hoi-ve-bien-tan","tag-bien-tan-nhat-ban","tag-bien-tan-tiet-kiem-dien","tag-bien-tan-yaskawa","tag-bien-tan-yaskawa-a1000","tag-bien-tan-yaskawa-e1000","tag-bien-tan-yaskawa-v1000","tag-cac-giai-phap-tiet-kiem-dien-cho-dong-co","tag-tiet-kiem-dien","tag-yaskawa-japan","tag-yaskawa-nhat-ban"],"_links":{"self":[{"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/wp\/v2\/posts\/8368","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=8368"}],"version-history":[{"count":0,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=\/wp\/v2\/posts\/8368\/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=8368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hunglong.banbientan.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}