110KV变电站设计毕业论?- 百度文库

ҵƣģ

ֵΪ Id(3)?Id*(3)?Ij 4.4

I(3)d*ϵͳз·ʱ·Ķ·ֵ I(3)dϵͳз·ʱ·Ķ·ֵ

X1?*㵽·ۺֵ翹 Ϊʡ± * 2·ļ㣺 I(2)d?31X1??X 2?X2?㵽·ĸۺϵ翹

I(2)d ·ʱ·ȫ

ֵΪ

I(2)2)d1?I(d?1X 1??X2?I(2)(2)d1,Id2ֱΪ·ʱ··

3ӵض·㣺 I(1,1)2d?31?X?X0?(1,1)(X?Id12??X0?)2 I(1,1)d·ӵʱ·ȫ I(1,1)d1·ӵʱ·

I(1,1)1d1?X1??X1?//X0? I(1,1)d2?I(1,1)X0?d1?X 0??X2?I(1,1)(1,1)?d0?IX2d1?X0??X2?

I(1,1)(1,1)d2,Id0ֱΪӵض·ʱĸ

4ӵض·ļ㣺

·Ϊ I(1)(1d1?I1)d2?

2x1?x013

4.5

(4.6)

4.7 4.8

4.9 4.10

4.11 ҵƣģ

5ѹѡ

5.1 ѹ·ѡ

ѹ·ڸѹ·ſƺͱãǸѹ·Ҫĵ豸ѡ·˲ƷϵлȾܲͬһͺŶ·Աٱü࣬豸кͼޡ ѡ·ʱӦ»Ҫ

1ںբʱӦΪ壬ܳͨɵʹͨ·ҲӦþ㹻ȶԺͶȶԡ 2բ״̬ӦõľԵԡ 3Ӧ㹻Ķ·;̵ܶķֶʱ䡣

4ӦоܳĻе͵Ҫṹ򵥡Сᡢװά㡣

ǵɿԺ;ԣάʵֱվ豸ɻĿ꣬

SF6·ԳΪѹظѹΨһзչǰ;Ķ·110kV

·ǿԵǿȼաСʹͼڳʹÿɿڲȫ⡣ն·СըСȾƵʹͼڳ̣СɾȷIJС죬ȼʱ̡ڿϵԴС޹أϨͷ϶ʻָٶȿ죬ϽܺãڿԸɵص㡣ʹ

35kVµĵѹȼСԣ10kVն·

5.2 뿪صѡ

뿪Ǹѹ豸һ֣ҪԴеբģС· ѡ뿪ʱӦ»Ҫ

1뿪طֿӦԵĶϿ㣬׼豸Ƿ 2뿪ضϿ֮Ӧ㹻ľԵ룬Ա֤ѹ

£ΣԱİȫ

3뿪Ӧ㹻ȶԡȶԡеǿȺ;Եǿȡ 4뿪բʱͬҪãҪѵբٶȣԾ

ͲʱĹѹ

14

ҵƣģ

5뿪صĽṹ򵥣Ҫɿ

6нӵصբĸ뿪أװԱ֤뿪صȷ

5.3ѹĸߵѡ

ѡװиѹĸߣҪӦݣ

1ѡĸߵIJϣṹзʽ 2ѡĸ߽ĴС

3ĸ߶·ʱȶͶȶ

435kVĸߣӦڵؾǷΣ 5Ҫĸߺʹĸߣڵĸ񶯣Ϊ⹲ӦУĸ

Ƶʡ

110kVĸһʽҪ󣬱10kVջ·϶࣬

10kVĸӦѡӲΪˡѡLMY-125;ȶҪ

5.4ѡ

5.4.1һλ·ѹѡ

Ϊȷѹȫڹ涨׼ȷУѹһӵѹUMSӦڣ0.811.2UN1Χڱ䶯Ӧ

0.81UN1

5.4.2λ·ѹѡ

ѹѹͨǹѹΪ100VDZͼ̵ĵѹʹáȻʽĶѹΪ100VɻѹĽ߷ʽѹΪ100/ 3 Vѹεĸѹ35kVԵ㲻ӵϵͳĵѹΪ100/3V110kVϵԵӵϵͳΪ100V 1׼ȷѡ

ѹĶӦҪ׼ȷӦСڵѹĶθɣSN2=S2θ

S2=

??S0cos??2???S0sin??2=??P????Q?2002 4.2

15

ҵƣģ

ʽУS0P0Q0cos?ֱΪDZڹʡùʡ޹ʡ

ѹľѡУ̼顣

5.5 ѹѡ

ѹǶλ·вͱõĵѹԴͨӳϵͳ״ǽһθѹΪβĵ͵ѹڲ ݡֲᡷԵѹõĹ涨

(1)ѹá߷ʽйأӦںԶװõҪ󡣵ѹӦзʽıʱװòʧѹڵ඼ȡѹ

(2) 6220kVѹȼһĸߵӦװѹ·ǷҪװѹӦӸسװѹҪȷ

3ҪӺͼ·޵ѹʱ߲һӦװѹ ָݡ͵ѡ涨ѹӦмѡУ飺һλ·ѹεѹθɡ ѹʽӦʹѡ: 1׼ȷȵȼ

2̵籣Ҫ

3320kVװ˲ͽԵṹҲɲ֬עԵṹĵʽѹ

4110kVװã׼ȷȵȼҪʱ˲õʽѹ

5.6 ѡ

רƹѹһֵ豸뱻ĵ豸

ѹһֵʱȷŵ磬˹ѹ豸 1װõÿĸϣӦװװʱ⡣ 2·ĸǷҪװӦ·ĸͶʱ豸ĵǷҪ

3220kV±ѹĵ볬ֵʱӦڱѹһ

16

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