Two-Stage Robust Expansion Planning of Transmission Network Considering Uncertainty of Offshore Wind Power

doi:10.16183/j.cnki.jsjtu.2023.028

Abstract

Abstract:

The complex and multiple uncertainties of offshore wind power pose great challenges to the safety and robustness of transmission grid structures. In order to improve the adaptability of grid structure to offshore wind power, a robust expansion planning method based on Vague soft set is proposed. First, Monte Carlo simulation is employed to construct the offshore wind Vague scenarios, which transform multiple comprehensive uncertainties of offshore wind power into uncertain parameter sets from true membership function, pseudo-membership function, and unknown information measure based on the Vague soft set theory. Then, a two-stage robust expansion planning model based on Vague scenario set is established for transmission network with offshore wind power penetration. The minimum total investment cost of offshore and onshore line and network loss is taken as the objective function in the first stage, while the minimum objectives of wind abandonment and cutting load for offshore wind power are proposed with the alternating current power flow constraint based on second-order cone relaxation in the second stage. Based on the expected values of wind abandonment and cutting load returned by the second stage model, the operation variables of the first stage model are modified to ultimately obtain the iterative transmission network robust planning scheme. Finally, the Gurobi mathematical optimization engine is used to analyze the Garver 6-node system and IEEE 39-node system to verify the effectiveness and feasibility of the proposed robust expansion planning method.

Key words: offshore wind power, robust expansion planning, Vague soft set, transmission network, uncertainty

CLC Number:

TM715

TIAN Shuxin, HAN Xue, FU Yang, SU Xiangjing, LI Zhenkun. Two-Stage Robust Expansion Planning of Transmission Network Considering Uncertainty of Offshore Wind Power[J]. Journal of Shanghai Jiao Tong University, 2024, 58(9): 1400-1409.

Figures/Tables 8

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场景号	不确定集	规划模型	海陆线路投建费用/亿元	海上风电弃风率%	切负荷率/%	总成本/亿元
1	典型随机	常规规划	7.5591	4.64	0.92	36.02
2	典型随机	鲁棒规划	7.8688	1.31	0	29.82
3	Vague极限	常规规划	7.5620	5.72	3.28	72.81
4	Vague极限	鲁棒规划	7.8701	3.28	0	57.63

场景号	不确定集	规划模型	海陆线路投建费用/亿元	海上风电弃风率%	切负荷率%	总成本/亿元
1	典型随机	常规规划	8.6333	4.49	1.21	43.66
2	典型随机	鲁棒规划	9.2781	1.62	0	37.42
3	Vague极限	常规规划	8.6403	5.33	3.33	85.53
4	Vague极限	鲁棒规划	9.2456	3.09	0	56.52