Topology Optimization of Offshore Wind Power Collection System Considering Actual Carrying Capacity of Submarine Cables

doi:10.11930/j.issn.1004-9649.202307014

Abstract

Abstract:

The actual carrying capacity of submarine cables is important evidence for submarine cable selection, and in the topology optimization of offshore wind power collection systems, it is of great significance to consider the differences in carrying capacity of submarine cables in different laying sections and the effects of magnetic heat effect on the carrying capacity of the submarine cable laying in parallel with multiple circuits, which can ensure the safety of the power collection system. Firstly, the wind turbines were divided into clustered partitions using the fuzzy C-mean algorithm, and the power collection system topology was divided into intra-partition and extra-partition topology optimization. Then, a topological search algorithm based on Voronoi diagrams was used for the solution within the partition. Subsequently, in the extra-partition topology optimization, the impact of the submarine cable bottleneck section and the number of circuits on the carrying capacity was considered, and a mixed integer nonlinear optimization model was built. After linearization, the model was solved by the optimization solver GUROBI. Finally, an actual wind farm was used as a case for simulation verification. The results show that the proposed model can ensure the actual carrying capacity of the submarine cable is greater than the working current, and it effectively ensures the safety of the power collection system.

Key words: offshore wind farm, power collection system, topology optimization, carrying capacity, number of circuits

Jing YE, Junwen CAI, Lei ZHANG, Guanghao ZHOU, Jiehui HE, Xue ZHAI. Topology Optimization of Offshore Wind Power Collection System Considering Actual Carrying Capacity of Submarine Cables[J]. Electric Power, 2024, 57(7): 173-181.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202307014

https://www.electricpower.com.cn/EN/Y2024/V57/I7/173

Figures/Tables 12

References 22

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海缆截面积/ mm²	海底敷设载流量/A	J型管敷设载流量/A	空气敷设载流量/A	电阻/ (Ω·km^–1)	电感/ (mH·km^–1)	购置成本/ (万元·km^–1)
3×70	251	246	279	0.342	0.483	73.5
3×95	297	293	333	0.246	0.461	78.5
3×120	335	334	379	0.196	0.445	83.4
3×150	374	377	427	0.159	0.431	92.5
3×185	416	422	478	0.127	0.415	98.9
3×240	474	487	550	0.097 6	0.399	113.9
3×300	525	546	615	0.077 8	0.385	133.2
3×400	577	637	714	0.061 4	0.374	151.0

海缆截面积/ mm²	海底敷设载流量/A	J型管敷设载流量/A	空气敷设载流量/A	电阻/ (Ω·km^–1)	电感/ (mH·km^–1)	购置成本/ (万元·km^–1)
3×70	251	246	279	0.342	0.483	73.5
3×95	297	293	333	0.246	0.461	78.5
3×120	335	334	379	0.196	0.445	83.4
3×150	374	377	427	0.159	0.431	92.5
3×185	416	422	478	0.127	0.415	98.9
3×240	474	487	550	0.097 6	0.399	113.9
3×300	525	546	615	0.077 8	0.385	133.2
3×400	577	637	714	0.061 4	0.374	151.0

电缆回路数/根		修正系数
1		1.00
2		0.88
3		0.82
4		0.79
6		0.76
······		······

电缆回路数/根		修正系数
1		1.00
2		0.88
3		0.82
4		0.79
6		0.76
······		······

分区编号	升压站编号	空气敷设	海底敷设	J型管敷设	瓶颈段载流量
2	2	692.96	770.44	769.08	692.96
4	2	579.50	594.31	649.74	579.50
1	1	646.00	594.31	649.74	594.31
11	1	556.24	540.75	556.92	540.75
13	1	386.24	385.22	384.54	384.54
23	1	386.24	385.22	384.54	384.54