潮流与POWERWORLD--校对Word格式文档下载.doc

潮流与POWERWORLD--校对Word格式文档下载.doc

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24

2.41

13.8

14

63

2-3

32

1.96

4.45

4.9

22

3-6

40

4.24

0.65

4.3

21

4-7

19

13.65

1.84

62

4-5

25

3.51

3.16

4.7

5-6

26

11.4

9.25

14.7

5-7

16.75

16.9

77

LGJ-95

由上表进行第二次迭代：

802

7.5

11.2

51

2.31

12.1

12.3

56

1.9

4.0

4.5

0.2

12.85

1.94

2.61

3.1

4.1

18

5.7

3.6

6.8

31

17.7

0.1

80

此时所有导线型号已近不需要更改，迭代结束。

方案三线路的截面和型号如上表。

方案3matlab潮流计算与powerworld仿真潮流计算的对比

（1）方案三仿真电路图如下

仿真结果如下两个个图所示：

（2）用matlab程序得到的潮流计算

取基准值为SB=100MW，VB=110kV

B1矩阵：

1、支路首端号；

2、末端号；

3、支路阻抗；

4、支路对地电纳

5、支路的变比；

由各条线路参数的实名值和基准值计算线路参数标幺值，以及上述B1矩阵的要求得出如下的矩阵B1

B1=[1,2,0.07438+0.0714i,0,1;

1,6,0.089256+0.08568i,0,1;

2,3,0.119+0.114248i,0,1;

3,6,0.14876+0.1428i,0,1;

4,5,0.09297+0.089256i,0,1;

4,7,0.07066+0.0678i,0,1;

5,6,0.09669+0.0928i,0,1;

5,7,0.05727+0.072198i,0,1;

]

B2=[0.306+0.054j,0.032+0.02j,1,1,1;

0,0.063+0.035j,1,1,2;

0,0.062+0.038j,1,1,2;

0,0.102+0.05j,1,1,2;

0,0.085+0.038j,1,1,2;

0,0.094+0.05j,1,1,2;

0.085+0.015j,0,1,1,3;

运行结果：

matlab程序运行结果与powerworld仿真结果的对比

节点/支路

项目

1/1-2

2/1-6

3/2-3

4/3-6

5/4-5

6/4-7

7/5-6

5-7

电压标幺值

Powerworld

仿真结果

1.0000

0.98836

0.98137

0.98954

0.98991

0.98759

1.00001

Matlab

运行结果

1.000

0.9879

0.98038

0.9890

0.9887

0.9859

支路功率损耗

Powerworld仿真结果

0.0013+

0.0013i

0.0039+

0.0037i

0.0005+

0.0005i

0.0003+

0.0003i

0.0002+

0.0002i

0.0009+

0.0009i

0.0008+

0.0008i

0.0018+

0.0017i

0.0038+

0.0036i

0.00026+

0.00025i

0.00021+

0.00089+

0.00086i

0.003+

0.0029i

0.00123+

0.00155i

数据基本相近。

接线方案4：

14.3

65

18.3

18.9

86

8

3.7

8.8

3-4

8.2

9.1

43

23

LGJ-70

2.4

0.6

2.5

11

0.8

1

5

5.4

12.7

6.5

10.9

49

3

13.3

13.6

17.3

17.9

84

8.5

3.5

41

8.3

9.5

44

2.6

2.8

12

0.7

方案4matlab潮流计算与powerworld仿真潮流计算的对比

（1）方案四仿真电路图如下

B1=[1,2,0.0744+0.0714i,0,1,0;

1,6,0.0893+0.0857i,0,1,0;

2,3,0.1191+0.1142i,0,1,0;

3,4,0.0855+0.0821i,0,1,0;

3,6,0.1488+0.1428i,0,1,0;

4,5,0.0929+0.0893i,0,1,0;

4,7,0.0707+0.0678i,0,1,0;

5,6,0.0967+0.0928i,0,1,0;

5,7,0.0573+0.0722i,0,1,0;

B2=[0.306+0.054i0.032+0.02i1101

00.063+0.035i1102

00.062+0.038i1102

00.102+0.05i1102

00.085+0.038i1102

00.094+0.05i1102

0.085+0.015i01103]

运算结果：

4/3-4

5/3-6

6/4-5

7/4-7

5-6