272
Y. Xu et al.
Table 8. Operation parameters of newly built compressor station
Station
Inlet pressure (MPa)
Outlet pressure
(MPa)
Total power (KW)
Investment cost
(10 4 CNY)
14
2.40
5.37
1299.88
2826.74
16
3.96
5.62
1564.66
3151.87
17
4.00
5.62
263.52
1554.20
23
3.14
3.65
112.40
1368.63
24
3.10
3.63
330.92
636.96
34
3.76
4.73
290.03
1586.75
36
3.50
5.48
3045.51
4970.21
37
4.83
5.51
571.78
1932.70
Table 9. Design parameters of newly built pipelines
Start End Length (km) Diameter
(mm)
10
9
16.33
406
30
25
27.59
225
Table 10. The reconstruction cost of gathering pipeline system
Cost (10 4 CHY)
Modified CSs method
Unmodified CSs
method
Pipeline
186.05
175.45
CSs
3008.73
3337.07
Operation
11236.31
11469.21
Total Cost
14431.09
14981.73
5 Conclusion
A hybrid optimization framework is proposed for the capacity extension optimization
of a natural gas gathering system. New pipelines and CSs should be determined when
new blocks are connected to the original pipeline network. The MGA is first used for
layout optimization of new pipelines and then MPSO is employed to determine the
design parameters, including the diameter of each pipeline, as well as the locations of
new CSs and the optimal operation conditions of compressor facilities. In our model,
hydraulic constraints are considered, and four economic factors are considered in the
Y. Xu et al.
Table 8. Operation parameters of newly built compressor station
Station
Inlet pressure (MPa)
Outlet pressure
(MPa)
Total power (KW)
Investment cost
(10 4 CNY)
14
2.40
5.37
1299.88
2826.74
16
3.96
5.62
1564.66
3151.87
17
4.00
5.62
263.52
1554.20
23
3.14
3.65
112.40
1368.63
24
3.10
3.63
330.92
636.96
34
3.76
4.73
290.03
1586.75
36
3.50
5.48
3045.51
4970.21
37
4.83
5.51
571.78
1932.70
Table 9. Design parameters of newly built pipelines
Start End Length (km) Diameter
(mm)
10
9
16.33
406
30
25
27.59
225
Table 10. The reconstruction cost of gathering pipeline system
Cost (10 4 CHY)
Modified CSs method
Unmodified CSs
method
Pipeline
186.05
175.45
CSs
3008.73
3337.07
Operation
11236.31
11469.21
Total Cost
14431.09
14981.73
5 Conclusion
A hybrid optimization framework is proposed for the capacity extension optimization
of a natural gas gathering system. New pipelines and CSs should be determined when
new blocks are connected to the original pipeline network. The MGA is first used for
layout optimization of new pipelines and then MPSO is employed to determine the
design parameters, including the diameter of each pipeline, as well as the locations of
new CSs and the optimal operation conditions of compressor facilities. In our model,
hydraulic constraints are considered, and four economic factors are considered in the