基于多维柔性互联设备的双极直流配电网综合电压调控策略OA
Comprehensive Voltage Regulation Strategy for Bipolar DC Distribution Networks Based on Multi-dimensional Flexibly Interconnected Devices
双极直流配电网中由于直流源荷不对称接入及其随机性,易引发极间电压不平衡和因功率分布不均导致的电压越限等多类电压问题.为此,构建了一种具备多维功率调节能力的多维柔性互联设备,并基于该设备提出面向双极直流配电网的综合电压调控策略.首先,设计并分析了该柔性互联设备的拓扑结构及其功率传输模型,揭示其多维度调节特性.其次,建立了模式可切换直流变压器(DCT)和储能系统的功率传输模型.然后,考虑到双极柔性互联设备和其他调节设备的配合,以最小化运行成本和电压越限成本建立了综合电压调控模型.接着,利用凸松弛和分段线性化等方法实现对模型的转化.最后,通过33节点和123节点的双极直流配电网算例验证了所提策略的有效性与适应性.
In bipolar DC distribution networks,the asymmetric integration and stochastic characteristics of DC sources and loads can lead to various voltage issues,such as inter-pole voltage unbalance and voltage violation resulting from uneven power distribution.To address these challenges,a multi-dimensional flexibly interconnected device with multi-dimensional power regulation capabilities is developed,based on which a comprehensive voltage regulation strategy for bipolar DC distribution networks is proposed.Firstly,the topological structure and power transmission model of the flexibly interconnected device are designed and analyzed,with a focus on its multi-dimensional regulatory characteristics.Secondly,the power transmission models for both mode-switchable direct current transformers and energy storage systems are established.Next,a comprehensive voltage regulation model is developed to minimize the operation costs and penalties for voltage violations,taking into account the coordination between bipolar flexibly interconnected devices and other regulatory devices.Thirdly,the linearization of this model is achieved through techniques such as convex relaxation and piecewise linearization.Finally,the effectiveness and adaptability of the proposed strategy are validated through case studies in 33-bus and 123-bus DC distribution networks.
张程嘉;杨晓东;魏金萧;杨越;李贺龙;杨之青
电能高效高质转化全国重点实验室(合肥工业大学),安徽省 合肥市 230009电能高效高质转化全国重点实验室(合肥工业大学),安徽省 合肥市 230009电能高效高质转化全国重点实验室(合肥工业大学),安徽省 合肥市 230009电能高效高质转化全国重点实验室(合肥工业大学),安徽省 合肥市 230009电能高效高质转化全国重点实验室(合肥工业大学),安徽省 合肥市 230009电能高效高质转化全国重点实验室(合肥工业大学),安徽省 合肥市 230009
直流配电网电压不平衡柔性互联设备电压调控凸松弛
DC distribution networkvoltage unbalanceflexibly interconnected devicevoltage regulationconvex relaxation
《电力系统自动化》 2026 (7)
153-165,13
国家自然科学基金资助项目(52377090)国家自然科学基金联合基金重点支持项目(U22B20116). This work is supported by National Natural Science Foundation of China(No.52377090,No.U22B20116).
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