【作者】 陈俊彬；

【导师】 武小梅； 张涛；

【作者基本信息】 广东工业大学 ， 电气工程（专业学位）， 2025， 硕士

【摘要】 当前,得益于国家政策扶持与新能源发电技术的革新,促使大量“源荷储”设备接入电力系统。一方面,高比例分布式能源的投入给社会可持续发展带来诸多益处,大规模的电动汽车和储能并网也可为电网提供辅助服务。另一方面,传统交流配电网却因新型“源荷储”的涌入陷入线路走廊受限、可再生能源消纳不佳的困境。与之相比,直流配电网优势突显,交直流混合配电网由此备受研究者瞩目,成为解决问题的关键路径。而能量路由器具备分布式控制与协调功率流向等优势,是保障交直流混合配电网稳定运行的核心要件。鉴于此,本文结合国内外研究现状对能量路由器在交直流系统中的应用开展了如下研究。(1)根据能量路由器拓扑结构建立了基于能量路由器的交直流配电台区模型,并对其所连接的端口设备进行了数学建模及控制策略的设计。在MATLAB/SIMULINK平台对该模型进行仿真验证,模拟模型在孤岛模式和并网模式下的工作状态,旨在验证所提模型在不同运行条件下的有效性。(2)提出含光伏和电动汽车等可调控负荷的交直流混合配电台区能量路由器双层优化配置模型来解决大量分布式光伏接入配电台区出现的问题。该模型以降低配电变压器负荷峰谷差、提高光伏消纳率和降低台区年综合费用为目标函数,以配置储能、直流变压器和电力电子设备容量以及引导电动汽车有序充放电为控制变量,采用归一化法向约束法(Normalized Normal Constraint,NNC)对模型进行求解。实现了不同场景下台区运行的经济性和环境友好性。(3)提出结合交替迭代法与解耦法的含能量路由器交直流混合配电网潮流计算方法,在此基础上建立以降低系统网损和电压偏差为目标函数的多目标潮流优化模型。通过调控配电网中能量路由器的交直流端口控制参数,来实现配电网潮流优化,并提出一种改进蛇的多目标优化算法对所提优化模型进行求解。对江西省某10 k V实际配电网进行模型修改,得到含58节点的交直流混合配电网,并对该系统进行算例分析。验证所提潮流计算方法的正确性,以及证明所提的多目标潮流优化模型可以有效提高交直流混合配电网系统的安全性和经济性。更多还原

【Abstract】 At present,thanks to the national policy support and the innovation of new energy power generation technology,a large number of"source load storage"equipment is connected to the power system.On the one hand,the high proportion of distributed energy investment has brought many benefits to the sustainable development of society,and large-scale electric vehicles(EVs)and energy storage can also provide auxiliary services for the grid.On the other hand,the traditional AC distribution network has fallen into the dilemma of limited line corridors and poor consumption of renewable energy due to the influx of new"source load and storage".In contrast,DC distribution network has prominent advantages,and AC-DC hybrid distribution network(AC-DC HDN)has attracted much attention from researchers and become a key path to solve problems.The energy router(ER)has the advantages of distributed control and coordinated power flow direction,which is the core element to ensure the stable operation of AC-DC HDN.In view of this,this thesis combined with the domestic and foreign research status of the application of ER in AC/DC system carried out the following research.(1)According to the topology of the ER,the AC-DC distribution area model based on the ER is established,and the mathematical modeling and control strategy of the connected port devices are designed.The model was simulated and verified on MATLAB/SIMULINK platform to simulate the working state of the model in island mode and grid-connected mode,aiming to verify the effectiveness of the proposed model under different operating conditions.(2)A bi-level optimal configuration model of AC-DC hybrid ER with adjustable load such as photovoltaic(PV)and EVs is proposed to solve the problem of a large number of distributed PV access to the distribution area.The model takes reducing the peak-valley difference of distribution transformer load,increasing the PV absorption rate and reducing the annual comprehensive cost of the station area as the objective function,and takes the configuration of energy storage,DC transformer and power electronic equipment capacity and guiding the orderly charging and discharging of EVs as the control variables.The model is solved by Normalized Normal Constraint(NNC)algorithm.The economy and environmental friendliness of the downstage operation in different scenarios are realized.(3)A new power flow calculation method for AC-DC HDN with ER combined with alternating iteration method and decoupling method is proposed.Based on this method,a multi-objective power flow optimization model is established to reduce network loss and voltage deviation.The power flow optimization is realized by adjusting the control parameters of the AC/DC ports of the ER in the distribution network,and an improved multi-objective snake optimization algorithm(IMSOA)is proposed to solve the proposed optimization model.A 58-node AC-DC HDN was obtained by transforming a 10 k V distribution line in Jiangxi Province,and the system was analyzed with an example.The correctness of the proposed power flow calculation method is verified,and it is proved that the proposed multi-objective power flow optimization model can effectively improve the safety and economy of AC-DC HDN system.更多还原