发电厂的设计毕业论文
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
发电厂的设计毕业论文
第一章主变及所用变的选择
第一节主变压器的选择
一、负荷统计分析
1、35kV侧
Q
1max=
var
44
.
6197
10000
85
.0/
10000
cos
/2
2
2
max
1
2
1
2
max
1
2K
P
P=
-
=
-
ϕ
Q
2max=
var
44
.
6197
10000
85
.0/
10000
cos
/2
2
2
max
2
2
2
2
max
2
2K
P
P=
-
=
-
ϕ
Q
3max =
var
47
.
3718
6000
85
.0/
6000
cos
/2
2
2
max
3
2
3
2
max
3
2K
P
P=
-
=
-
ϕ
Q
4max =
var
4500
6000
80
.0/
6000
cos
/2
2
2
max
4
2
4
2
max
4
2K
P
P=
-
=
-
ϕ
Q
5max =
var
4500
6000
80
.0/
6000
cos
/2
2
2
max
5
2
5
2
max
5
2K
P
P=
-
=
-
ϕ
∑35P=P1max+P2max+P3max+P4max+P5max=10000+10000+6000+6000+6000=38000(KW) ∑35Q=Q1max+Q2max+Q3max+Q4max+Q5max
=6197.44+6197.44+3718.47+4500+4500=25113.35(KVar)
S
35MAX =2
max
35
2
max
35
Q
P+=2
235
.
25113
8000
3+=45548.66(KVA)
35ϕCos =
MAX
S P
35max
35∑=
66
.4554838000
=0.83
考虑到负荷的同时率,35kV 侧最大负荷应为: S ’35MAX =S 35MAX ⨯35η=45548.66⨯0.85=38716.36(KVA)
2、10kV 侧: Q 1max=var 36.1549250085.0/2500cos /222max 1212max
12
K P P
=-=-ϕ
Q 2max =var 49.1239200085.0/2000cos /222max 2222max 22K P P =-=-ϕ Q 3max =var 1125150080.0/1500cos /222max 3232max 32K P P =-=-ϕ Q 4max =var 49.1239200085.0/2000cos /222max 4242max
42
K P P
=-=-ϕ
Q 5max =var 1500200080.0/2000cos /222max 5252max
52
K P P =-=-ϕ Q 6max =var 74.619100085.0/1000cos /222max 6262max
62
K P P =-=-ϕ Q 7max =var 750100080.0/1000cos /222max 7272max
72
K P P =-=-ϕ Q 8max =var 620100085.0/1000cos /222max 8282max
82
K P P =-=-ϕ Q 9max =var 1125150080.0/1500cos /222max 9292max
92
K P P
=-=-ϕ Q 10max =
var 62.929150085.0/1500cos /222max 102102max
102
K P P
=-=-ϕ
∑10
P
=P 1max +P 2max +P 3max +P 4max +P 5max + P 6max +P 7max +P 8max +P 9max +P 10max
=2500+2000+1500+2000+2000+1000+1000+1000+1500+1500=16000(KW )
∑10Q = Q
1max
+Q 2max +Q 3max +Q 4max +Q 5max +Q 6max +Q 7max +Q 8max +Q 9max +Q 10max
=1549.36+1239.49+1125+1239.49+1500+619.74+750+620+1125+929.62=10697.7(KVar )
S 10MAX =∑+∑2
max 102max 10Q P =27.10697216000+=19246.84(KVA ) 10ϕCos =
MAX
S P
1010
∑=
84
.1924616000
=0.83
考虑到负荷的同时率,10kV 侧最大负荷应为: