Distribution Network Coordinate Operation Considering Net Load Uncertainty

doi:10.11930/j.issn.1004-9649.202402011

Abstract

Abstract:

Maximizing the consumption of renewable energy while ensuring the safe and economic operation of distribution networks has become an urgent issue. Firstly, the renewable energy output and load on the nodes are aggregated into net loads, and their uncertainties are described in the form of intervals. Meanwhile, the mapping of the regulation capacity in the system onto the nodes is described as intervals with optimizable endpoints, and the common part between the regulation capacity intervals and the net load disturbance intervals reflects the acceptable domain for net load disturbances at that node. Then, based on priority goal planning, a three-tier optimization model is constructed, aiming to maximize the acceptable domain of net load disturbances, minimize the total operational cost of the distribution network, and minimize voltage deviations, while considering the uncertainty of net loads. This results in an optimized solution that comprehensively considers the maximization of renewable energy consumption, reasonable operational costs, and minimal node voltage fluctuations, ensuring the safety, reliability, and economy of distribution network operation. Finally, the effectiveness of the proposed model and method is verified through a case study based on a modified IEEE 33-node distribution network.

Key words: synergic optimization, admissible region of net load, priority goal programming, safe and economic operation, three-layer operation

Dongli JIA, Xiaoyu YANG, Keyan LIU, Xueshun YE, Zhao LI. Distribution Network Coordinate Operation Considering Net Load Uncertainty[J]. Electric Power, 2024, 57(9): 169-180.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202402011

https://www.electricpower.com.cn/EN/Y2024/V57/I9/169

Figures/Tables 15

References 29

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参数	DG1	DG2	DG3	DG4	上级电网
初始出力	0	0	0	0	0
有功出力上限/MW	0.4	1.2	1.2	0.6	2
有功出力下限/MW	0	0	0	0	0
上爬速率/(MW·h^–1)	0.4	1.2	1.2	0.6	2
下爬速率/(MW·h^–1)	0.4	1.2	1.2	0.6	2
运行成本系数a/(元·MW^–2)	0	0	0	0	0
运行成本系数b/(元·MW^–2)	127	110	115	118	100
运行成本系数c/元	37	25	27	31	0

参数	DG1	DG2	DG3	DG4	上级电网
初始出力	0	0	0	0	0
有功出力上限/MW	0.4	1.2	1.2	0.6	2
有功出力下限/MW	0	0	0	0	0
上爬速率/(MW·h^–1)	0.4	1.2	1.2	0.6	2
下爬速率/(MW·h^–1)	0.4	1.2	1.2	0.6	2
运行成本系数a/(元·MW^–2)	0	0	0	0	0
运行成本系数b/(元·MW^–2)	127	110	115	118	100
运行成本系数c/元	37	25	27	31	0

结果	总净负荷可接纳域/MW	总成本/元	运行成本/元	备用成本/元
第1层	21.271	8991.22	8749.352	241.868
第2层	21.271	8544.08	8321.909	222.170
第3层	21.271	8544.08	8321.909	222.170

结果	总净负荷可接纳域/MW	总成本/元	运行成本/元	备用成本/元
第1层	21.271	8991.22	8749.352	241.868
第2层	21.271	8544.08	8321.909	222.170
第3层	21.271	8544.08	8321.909	222.170

系数(w₁, w₂, w₃)	电压偏差/ p.u.	总成本/ 元	运行成本/ 元	净负荷可接纳域/MW
(0.33, 0.33, 0.33)	6.2	9043.727	8725.301	31.906
(0.5, 0.2, 0.3)	6.3	8987.916	8667.654	31.906
(0.3, 0.5, 0.2)	6.7	8901.824	8576.324	31.730
(0.6, 0.2, 0.2)	6.2	9040.109	8719.671	31.906
(0.2, 0.6, 0.2)	6.4	8840.061	8511.273	31.730
(0.2, 0.2, 0.6)	6.1	9133.054	8824.487	31.305