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¶ȲDZԭ
ʱ:2010-12-16

1.1¶ȲDZ


¶DZȳ̶ȵIJֱӱȽϵķֵֻʵ¶йصܶȣճȣӲȣ絼ʵȡ 1.1.1ȵ¶DZ


ȵ¶ȼƵԭõ뵼ĵ¶ȱ仯һԡȵ¶ȼƵҪŵУȸߣԺ;нϴIJΧڵ·;ʹԶУҲԶͬȵҲȱݣڸ(850)׼ȷԲ;Ͳ͸ʴ
ȵ¶ȵĹϵһηʣMt¶ȣ abc(ȷ)λֱΪMM-1M-2
ĿǰȵIJҪвͭȣЩҪڳ¶ȶε¶ıֵԹϵҪܲ¶ȼơ
һֹѧܺȶǿᴿõĹԣƳɼϸIJ˿ͭȽȣнϸߵĵʣԸߣһֱȽȵϣȱǵ¶ϵСڻԭйױ࣬۸ҲϹ󡣲Ĵͨðٶȵʾ W(100)=R100/R0R100100ʱĵֵR00ʱĵֵIEC׼W(100)=1.3850ʼֵΪR0=100(R0=10)IJΪҵñ׼裬R0=10IJ¶ȼƵ˿ϴ֣ҪӦڲ600ϵ¶ȡĵ¶ȷΪһֶη̣Rt=R0[1+At+Bt2+C(t-100)t3] t-2000 Rt=R0(1+At+Bt2) t0850˷̣ɸݵֵ֪¶ֵʵʹУǿԲȵֶȱݵֵȷ¶ֵݱ׼涨ȵΪABA(0.15+0.002|t|), B(0.3+0.005|t|)ֳʹõȵһ㶼װȵ裬ȵ塢ԵϡɣȵͱܺһмԵϣܹܺõıȵ壬ͳ͸ʴͼ1ʾ
ȵƣƣƼ֣ڲϴѲʹãڹҵһƵģʵһΪơҪƲȵĽߡͼ2ʾƲȵڵa˲һcˣӶʵֵabc߶ӣbIJ߱ĵ裬cʹߵ費¶ȱ仯ߵӰСܶࡣɽʹõƲȵ裬ڶDZУпɱֵĵţϵIJȵ̲ͬԶԶDZĵеIJȵ΢ܽиȷIJa bcMV

1.2ȵż¶DZ

ȵż¶ȼȵЧӦ¶ȵģȵЧӦֲͬϵĵһ·ʱ˽¶Ȳͬ·оͽһСĵĴС뵼Լ¶йءһΪTˣˣһΪT0ˣαȶˣͼ3ʾʵʲУȵżĺźҪýϾܵĺI/O TT0B AT0CTT0BA IEC׼ĿǰʹõȵżҪв10--裬-ͭ30-6ȼȵżǶȵȶѧȶױ͸ʴ¶ϵС絼ʸߣϵȵ綯¶ΪԱ仯ϹԺã׼ӹص㡣ĿǰɽʹõDz10--ȵżȵżΪװȵżṹװȵͬҲȵż壬ԵϣܹɡT T0BATaм¶ȶȵżӦУҪɣм䵼嶨ɺм¶ȶɡм䵼嶨ɣͼ4ʾA,BϹɵȵżT0˲𿪣ֵCô·ֵܵ綯ΪEABC(T,T0)=EAB(T)-EAB(T0),ֵ¶ͬʱԭȵȵżĵ綯Ӱ ȵżм¶ȶɣȵż·֣¶ΪT,T0ʱȵ綯ƣڸȵżڽ¶ΪT,TaTa,T0ʱȵ綯ƵĴ͡EAB(T,T0)=EAB(T, Ta)-EAB(Ta,T0) T0T0C MVȵżм䵼嶨ɺм¶ȶɣǿԽȵżT0˲𿪣úԶͼ6Ϊ˽ȵżIJαȶ㶨¶T0߲УҪӳȵżΪ˽Լؽʱӳdzò߽ӳ߾ȵ빤ȵżIJƳɵߣȵżIJαȶӳҪĵطҲԹȵż·볬
ȵżIJαȶ˴ȵżĵ綯ȵż¶ȵĺΪ˱¶綯Ƶԣʹһ¶ȱֺ㶨׼ֶȱǸݲαȶΪ0ʱ綯¶ȵĶӦֵʵӦУαȶ˲ᱣ0棬DzһЩǻᾡαȶ˱һ㶨¶Ta׼ֶȱپԵõ¶ֵ, E (T,T0)=E (T, Ta)+E(Ta,T0)ڶDZпԶԲαȶ¶ȽԶģеλԶ͵Զ

1.1.3ʽ¶DZ

ʽ¶ȼһԭвġľǾƾ¶ȼƣˮ¶ȼƣҺʽ¶ȼƵIJҺ¶ȵƣСֶȿԵ0.1档ù¶ȵ¶ȼƣ˫¶ȼƣϵͬĽͣһ˹̶ʱϵIJͬɶ˻һĽλƣλƾŴָӦ¶ָʾһʱܷҺͻѹ仯Ӧ¶ȡ

1.1.4ʽ¶DZ

κȺ󶼽һתΪܣ¶Խߣ䵽ΧռԽ࣬Բʽֳ䲨Χ㣬ɶ̲ʼX⣬ߣɼ⣬һֱŲһ㹤̲ҪʱɼͺߡڷǽӴʽ£Ӧõ಻òµijϣһӦ900ϵĸ£ƼڷչĿǰӦúԭ¶ȼܲ¶ȡ

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