电工技术学报  2024, Vol. 39 Issue (9): 2621-2634    DOI: 10.19595/j.cnki.1000-6753.tces.232192
“规模化分布式源荷接入下交直流混合配电网优化运行与稳定控制技术”专题(特约主编:贾宏杰 唐 巍 肖 迁 冀浩然) |
考虑柔性资源多维价值标签的交直流配电网灵活调度
李宗晟, 张璐, 张志刚, 娄铖伟, 唐巍
中国农业大学信息与电气工程学院 北京 100083
A Flexible Scheduling Method of AC/DC Hybrid Distribution Network Considering the Multi-Dimensional Value Tags of Flexible Resources
Li Zongsheng, Zhang Lu, Zhang Zhigang, Lou Chengwei, Tang Wei
College of Information and Electrical Engineering China Agricultural University Beijing 100083 China
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摘要 可再生能源高渗透率使得交直流配电网面临严重的随机性和波动性,充分挖掘柔性资源调控潜力可以有效地降低可再生能源带来的网络运行风险。针对当前交直流配电网优化调度主要考虑电压源型换流器(VSC)的调控能力,对VSC与柔性资源协同研究不足的问题,提出一种考虑柔性资源多维价值标签的交直流配电网灵活调度方法。首先,考虑柔性资源调控特性差异,构建了包含响应时段、调节能力、调节成本及响应意愿的多维价值标签评估体系,准确全面地评估柔性资源聚合调控潜力范围;其次,以运行成本最小为目标函数,柔性资源多维价值标签为约束,建立交直流配电网两阶段鲁棒日前优化调度模型,并采用嵌套列和约束生成算法(C&CG)及强对偶理论进行求解;最后,通过改进的IEEE 33节点交直流配电网仿真结果表明,所提方法能够充分发挥柔性资源的调控潜力和协同能力,同时可有效提高模型求解效率和求解精度。
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李宗晟
张璐
张志刚
娄铖伟
唐巍
关键词 多维价值标签交直流配电网柔性资源两阶段鲁棒优化调度嵌套列和约束生成(C&CG)算法    
Abstract:The high permeability of renewable energy makes the AC/DC hybrid distribution network face serious randomness. Fully tapping the regulation potential of flexible resources can effectively reduce the operation risk of distribution network caused by renewable energy. At present, many studies have explored the regulation potential of distribution network from multiple levels of ''source-network-load-storage'' of AC/DC hybrid distribution network, which has improved the economy and safety of system operation to a certain extent. However, there are some problems, such as single evaluation index of flexible resource, insufficient research on collaborative control of voltage source converter (VSC) and flexible resources, and difficulty in suppressing the uncertainty of renewable energy. A flexible scheduling method of AC/DC hybrid distribution network considering multi-dimensional value tags of flexible resources is proposed.
Firstly, considering the influence factors of the regulation potential for flexible resources such as temperature-controlled load, electric vehicle and VSC, a multi-dimensional value tag evaluation system is proposed, including response period, regulation capability, regulation cost and response willingness. The regulation potential of temperature-controlled load, electric vehicle and VSC is evaluated respectively, and the comprehensive regulation potential range of flexible resources in each response period is further accurately calculated. Secondly, a two-stage robust day-ahead optimal scheduling model of AC/DC hybrid distribution network is established, in which the objective function is minimizing the operation cost, and the constraints include the operation constraints of various types of equipment, the operation safety constraints of AC/DC hybrid distribution network, the renewable energy output interval and the total control potential range of flexible resources.
The simulation results of the improved IEEE 33 node AC/DC hybrid distribution network show that the multi-dimensional value tags of flexible resources can accurately evaluate the comprehensive regulation potential of each response period, according to the historical electricity consumption habits, travel habits and response willingness of different users, thereby improving the solution efficiency and accuracy of the proposed scheduling model of AC/DC hybrid distribution network. The power demand can be reduced by power reduction and power transfer of flexible resources such as temperature-controlled load and electric vehicle on the temporal scale, which can also be reduced by transferring load power between AC and DC systems using VSC on the spatial scale. The coordinated scheduling of flexible resources and VSC can effectively reduce the operation cost of AC/DC hybrid distribution network and improve the accommodation capacity of renewable energy.
The following conclusions can be drawn from the simulation analysis: (1) Aiming at the difference of regulation characteristics between flexible resources such as temperature-controlled load, electric vehicle and VSC, a multi-dimensional value tag system including response period, regulation capability, regulation cost and response willingness is constructed, which can accurately evaluate the comprehensive regulation potential range of flexible resources. (2) A two-stage robust day-ahead optimal scheduling model of AC/DC hybrid distribution network is established, which takes the minimum operating cost as the objective function and the multi-dimensional value tags of flexible resources as the constraint. It not only avoids the infeasible solutions beyond the power regulation potential of flexible resources, but also reduces the solution space of optimization variables, thus improving the computational efficiency. The nested C&CG algorithm can effectively improve the solution accuracy and cope with the uncertainty of renewable energy.
Key wordsMulti-dimensional value tags    AC/DC hybrid distribution network    flexible resources    two-stage robust optimal scheduling    nested C&CG algorithm   
收稿日期: 2024-01-08     
PACS: TM73  
基金资助:国家自然科学基金面上项目资助(51977211)
通讯作者: 唐 巍 女,1971年生,博士,教授,博士生导师,研究方向为配电网规划设计与优化运行、分布式光伏消纳技术。E-mail:wei_tang@cau.edu.cn   
作者简介: 李宗晟 男,1996年生,博士研究生,研究方向为交直流配电网优化调度。E-mail:2417783396@qq.com
引用本文:   
李宗晟, 张璐, 张志刚, 娄铖伟, 唐巍. 考虑柔性资源多维价值标签的交直流配电网灵活调度[J]. 电工技术学报, 2024, 39(9): 2621-2634. Li Zongsheng, Zhang Lu, Zhang Zhigang, Lou Chengwei, Tang Wei. A Flexible Scheduling Method of AC/DC Hybrid Distribution Network Considering the Multi-Dimensional Value Tags of Flexible Resources. Transactions of China Electrotechnical Society, 2024, 39(9): 2621-2634.
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