\r石季英¹，乔 文¹，薛 飞²，马 丽³，杨文静\r¹\r
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AuthorsHTML:\r石季英¹，乔 文¹，薛 飞²，马 丽³，杨文静\r¹\r
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AuthorsListE:\rShi Jiying¹，Qiao Wen¹，Xue Fei²，Ma Li³，Yang Wenjing\r¹\r
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AuthorsHTMLE:\rShi Jiying¹，Qiao Wen¹，Xue Fei²，Ma Li³，Yang Wenjing\r¹\r
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Unit:\r1. 天津大学电气自动化与信息工程学院，天津 300072；
2. 国网宁夏电力有限公司电力科学研究院，银川 750001；
3. 国网天津东丽供电公司，天津 300300\r
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Unit_EngLish:\r1. School of Electrical and Information Engineering，Tianjin University，Tianjin 300072，China；
2. State Grid Ningxia Electric Power Research Institute，Yinchuan 750001，China；
3. Dongli Power Supply Branch，State Grid Tianjin Electric Power Company，Tianjin 300300，China\r
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Abstract_Chinese:\r固态变压器(solid state transformer，SST)作为一种利用电力电子器件实现能量管理和功率控制的新型变电装置，其应用将极大地提高配电系统的柔性调控能力，从而解决由于分布式电源接入给配网带来的诸多问题. 针对SST 在配网中的选址定容问题，考虑SST 协调配电网有功无功资源的运行优化，提出了一种计及配电网提前运行优化结果的SST 统筹规划方法. 首先，基于SST 的稳态数学模型，研究了SST 在双交流/交直流系统连接下，计及负荷与分布式电源的参数时序控制方法. 其次，建立了融合配电网有功无功时序运行优化的SST 双层规划模型，上层考虑SST 的投资成本、环境效益和配电网年运行成本，对SST 的安装位置和容量进行了规划；下层以配电网日运行成本最低为目标，进行时序多场景下SST 协调配网中有功无功资源的日运行优化，并提出改进的主从式差分入侵杂草混合算法进行双层规划模型迭代求解. 最后，采用改进的33 节点配电系统进行仿真验证，结果表明：相较于考虑SST 协调配电网单方面有功/无功运行的规划方法，所提方法的配网年综合成本分别减少91.1 k$和21.8 k$；相较规划前和单层规划方法，所提方法的配网年运行成本分别降低10.6 k$和92.7 k$，电压偏差分别减少25%和18%. 所以，计及配网有功无功运行优化的SST 双层规划方法，可以充分考虑协调主动配电网有功无功资源运行对SST 配置规划的影响，提高系统运行的经济性和规划方案的可行性.\r
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Abstract_English:\rA solid-state transformer(SST)is a novel electronic device that enables energy management and power control．The application of SST promotes flexible regulation of distribution networks and solves many problems caused by access of distributed generation．To address siting and sizing problems in the use of SST，we propose an overall planning method that considers the coordinated operation of active/reactive power for distributed networks．First，based on the steady-state model of SST，a sequential parameter control method was studied considering
the fluctuation of load and distributed generation under a dual AC-AC/AC-DC connection．Furthermore，a bilevel planning model of SST was established considering the operational optimization of active/reactive power for distributed networks．The siting and sizing of SSTs were optimized at the upper level by considering invested costs and environmental benefits，as well as annual comprehensive operational costs．The coordinated operation of active/ reactive power was optimized at the lower level to achieve the lowest daily operating cost of the distribution networks．In addition，a hybrid parallel modified differential invasive weed optimization algorithm was proposed to solve the bi-level planning model．Finally，case studies based on modified 33-node system verified the practicality and effectiveness of the proposed method．Compared with the planning method of SST that considered the unilateral active/reactive power operation of distribution networks，the proposed method reduced the annual comprehensive cost by 91.1 k$ and 21.8 k$．Compared with unplanned and single-layer planning methods，the proposed bi-level planning method reduced the annual operating cost by 10.6 k$ and 92.7 k$，respectively，and the voltage deviations were decreased by 25% and 18%．Thus，the proposed bi-level planning method of SST coordinated the effect of operating
the active distribution network on the SST configuration，as well as improved the economy of system operation and feasibility of the planning scheme．\r
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Keyword_Chinese:固态变压器；参数控制；有功无功协调运行；双层规划；稳态模型\r

Keywords_English:solid-state transformer；parameter control；coordinated operation of active/reactive power；bi-level planning；steady-state model\r


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