计及直流变压器控制模式切换的直流配电网优化运行策略  

Optimal Operation Strategy for DC Distribution Network Considering Control Mode Switching of DC Transformer

作　　者：周念成[1] 范炳昕 廖建权 周亦尧 王强钢[1] ZHOU Niancheng;FAN Bingxin;LIAO Jianquan;ZHOU Yiyao;WANG Qianggang(National Key Laboratory of Power Transmission Equipment Technology(Chongqing University),Chongqing 400044,China;College of Electric Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]输变电装备技术全国重点实验室(重庆大学),重庆市400044 [2]四川大学电气工程学院,四川省成都市610065

出　　处：《电力系统自动化》2025年第6期176-186,共11页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52077017)。

摘　　要：直流变压器(DCT)是实现多电压等级直流配电网互联的关键设备,其控制策略对系统的高效运行和电能质量至关重要。文中提出了一种计及DCT控制模式切换的直流配电网优化运行策略。首先,介绍了DCT的拓扑及控制方式,推导了不同控制模式下的DCT端口电压电流传递矩阵;在此基础上,结合网络约束方程,建立含DCT的直流配电网简化模型,分析了DCT不同控制模式对网络运行的影响。然后,将不同控制模式下DCT端口传递矩阵嵌入潮流计算方程,建立以系统损耗最小为目标函数,考虑电网安全运行及储能约束的多电压等级直流配电网优化运行策略并给出求解流程。最后,利用修改的IEEE直流配电网算例,验证了所提优化策略的有效性。The DC transformer(DCT)is the key equipment for achieving interconnection of multi-voltage-level DC distribution networks,and its control strategy is crucial for the efficient operation of the system and power quality.This paper proposes an optimal operation strategy for DC distribution network considering control mode switching of DCT.Firstly,the topology and control modes of DCT are introduced,and the voltage-current transfer matrices of DCT ports in various control modes are derived.On this basis,combined with network constraint equations,a simplified model of DC distribution network with DCT is established,and the impact of different control modes of DCT on network operation is analyzed.Then,the DCT port transfer matrices in various control modes are embedded into the power flow calculation equations,and an optimal operation strategy for multi-voltage-level DC distribution network is established with the objective function of minimizing system loss,taking into account the constraints of grid safety operation and energy storage,and the solution process is given.Finally,the effectiveness of the proposed optimal strategy is verified by using a modified IEEE DC distribution network case.

关 键 词：直流变压器 直流配电网 优化运行 控制模式切换 

分 类 号：TM7[电气工程—电力系统及自动化]