?????,????(??P.F)????: - PowerPoint PPT Presentation

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?????,????(??P.F)????:

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Title: PowerPoint Author: user Last modified by: TIGER-XP Created Date: 9/29/2006 2:44:10 AM Document presentation format: Company – PowerPoint PPT presentation

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Title: ?????,????(??P.F)????:


1
????(?)
??????
?????? ?? ??????????? ??? ?????,????,???????,???
??,??????
2
????(Power Factor)???
?????,????(??P.F)????
P
P
S
P.F ------------- ----------------------
P jQ
??, S???(????),SPjQ, P2Q2 P????,?????????
???,?????(KW)? Q????,?????,?????(KVAR),??????????
????
S
3
????
????????,??????,???????,???????,???????????????(??
?),??????????????,????????????
4
???????
????????????????,??????????????????????????,?????
???,?????????????????????,????????????????????,???
??????????,???????????????????????,?????????
5
??????????
P(KW)
QL (KVAR)
?
S(KVA)
QC (KVAR)
S(KVA)
?
P(KW)
(a)?????
(b)?????
6
???? ???? ???? ???? ???? ????
???? ???? ???? ?? ?? ??
????? ?? 1?? 10?? 100?? 1000??(20?) 10000??(60?) 82 86 86 80 68 68 72 72 66 50 16 14 11 6 5
????? ?? 1/8?? 1/4?? 1/2?? 62 66 72 43 45 54 21 18 17
?????? ??? ????? ???????????? ?? ??? ??????? ??? ?????? ?????? ?????? ??? ????? ???????????? ?? ??? ??????? ??? ?????? ?????? ?????? ??? ????? ???????????? ?? ??? ??????? ??? ?????? ?????? 100 50-95 ??? 50-75 50 70-95 30-40 85 60-80 10-20 100 50-95 ??? 50-75 50 70-95 30-40 85 60-80 10-20 100 50-95 ??? 50-75 50 70-95 30-40 85 60-80 10-20
?????????
7
??????
?????SP P1 P2 P3.... ?????SQ Q1Q2 Q3....
SP (SP)2( SQ)2
???????P.F
8
???
???????????20KVA,P.F.1,???30KVA,P.F.0.9,??,????
?500KVA,P.F.0.8????????????????
9
?????????
???????? ????????? ?????????? ?????????? ????????
10
???????????
?????
IL1cos?L
EL
?L
IL1sin?L
?????
IL1cos?L
EL
IL2 IL1
?L IL2
?2
IL2sin?L2
IC
IL1
11
???????????
12
????????
????????????(???????KW??),????????????,??????? ?IL
1???????????(???????)? ?IL2?????????? cos?L
??????? ?
IL2IL1cos?L-jIL1sin?L jIC IL2(IL1cos?L)2(IC-I
L1sin?L)2
13
?????????
??????eS,??????eR,??????e?
eeS- eR
I(Rcos ?Xsin?) Icos ? (RXsin?/ cos ?) Icos ?
(RXtan?)
??-- I????(A) R??????(O) X??????(O)
14
??????????
????????????????????????????????????,?????????????
??,???????????????????????2.5-7.5 ?????????????
?1-(??cos ?/???cos ? )2?
15
??????????
?????????????????????,????????????,???????????????
????
S1-S2
S1
cos ?2
-1 -1
S2
S2
cos ?1
16
??????????????????
???????? ???????? ???????? ???????? ???????? ????????
???????? 0.6 0.7 0.8 0.9 1.0
0.5 20 40 60 80 100
0.6 0 17 33 50 67
0.7 - 0 15 29 43
0.8 - - 0 13 25
0.9 - - - 0 11
17
????????
????????????????,????????????????????????,??????,?
???????????,??????????????,?????????,???????,?????
??????1.5?
KWH
P.F.av(????)
100
(KWH)2(KVARH)2
18
???
????????0.8,?????????100KVA,?????????0.95?,??????
??????????????????????????????
19
????
???????????????KVAR(??),???????????µF(???)????
20
KVAR???????,?1
21
KVAR???????,?2
22
KVAR???????,?3
23
?????????
24
KVAR?µ F?60Hz?????
25
KVA,KW,KVAR???
KW
?2
KVA2
KVAR2
?1
KVAR2
KVA1
CKVAR
26
??????????
CKVAR KVAR1-KVAR2 KW(tan?1-tan?2)
27
???????(tan?1?tan?2)????
28
???
??????500KW,?????0.8,????????0.95,???????KVAR?µF??
???????60Hz,?????220V?
29
???
?800KW???,?????0.8,????????0.9,???????KVAR?
30
??????
??????????110???,?????????????????????,??????,???
????????????135????????,?????,??????????????????,
??????,?????,????????????,??????????,??????????,??
????50V???600V???????,?????????,??????50V???
31
??????
?????????????? ????????KVAR ??KVAR(????/????)2
32
????????
33
????????
??????????????????????????????? 3
????????????????(pu),?????? ??????????????????
? ?,???I2X?
34
??????
35
????
36
????????
  • ?????????,??
  • ????????(15-0)
  • ???????
  • ???????????,???????110
  • ??????????????(??????,????????)???,???????????????
    ???????????????,???????????????????????????135?

37
???????????,??????,??????135?????,????????(Switch
ing Surge)???????,????,???????????,??,??????????
1.??????????135?? 2.?????????????????? 3.??????,?
????????
38
????,???????????????????????(Load Break
Switch)??????????????????,??????????????????,???1.
500KVAR??,?????????????????????(51)????????(51N)?,
????????(59)??????(27)?
39
???????????
40
??
  1. ??????????? ,??????,???????????
  2. ????????????
  3. ???????,????????

41
??
  1. ????????(BIL)??????
  2. ?????,?????????
  3. ?????????,????????,????????
  4. ????????????

42
?????Y??
43
??
  1. ???????,????????
  2. ????????????????,???????
  3. ?????,????????

44
??
  1. ????????????,??????????????
  2. ?????,????????,????????
  3. ???????????,???????????????????
  4. ??????????????????,??????????

45
??????Y??
46
??
  1. ????????????????,???????
  2. ????????,?????????????????????????????????

47
??
  1. ??????????(BIL)???????
  2. ???????,???????????
  3. ????????????,??????????,?????????
  4. ??????,??????????
  5. ??????????????
  6. ??????????????,??????????

48
??????????
?????????,???????????????,????????????????,??????
???,????????????,?????????????????????,??????,????
???????
49
??????????????
  1. ????
  2. ????
  3. ??????
  4. ??????
  5. ??????

50
???
?????????220V???7.5HP2?,10HP3?,15HP2?,5HP4?,????
??0.8,????PVC???,?????????0.95,??????????,?? 1.??
????????(KVAR)???? 2.???????? 3.??????????????????
???(??60Hz)
51
? (1)??????????-??????????
52
? (2)
??
53
? (3) ?????????????????- ???????(NFB)??????????
????????,????3P225AF125AT,IC(NFB?????)????????
54
????-??????
1.???? (1)????????0.95???? (2)???????0.85?,???0.8
5?,???0.6?? (3)???????0.9?,???0.85?? (4)???????0.7
5??
55
????-??????
2.??? Qm-----------------(tan?1-tan?2) Qlt??(?
?)??(KW)??(tan?1-tan?2) Qt?????(KVA)?????(??)
????(KW)?? ??
56
????-??????
3.?? Qm(933.50.736)0.6/0.85(0.264)60.3KVAR Q
lt1341.653KW0.850.15177.5KVAR Qtl(7500.0385)
0.750.75232.5KVAR Qtl(5000.0385)0.750.751
0.8KVAR QS60.3177.532.510.8281.1KVAR
57
????-??????
4.?? ????????30KVAR6,20KVAR6,20KVAR4???,??380K
VAR??????????0.95?
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