| 引用本文: | 尹昕,赖锦木,尹项根,王要强,尹越,胡家玄.微电网混合型联网变压器及其故障阻隔协调控制[J].电力自动化设备,2023,43(10):145-151,207 |
| YIN Xin,LAI Jinmu,YIN Xianggen,WANG Yaoqiang,YIN Yue,HU Jiaxuan.Hybrid interlinking transformer and its fault blocking coordination control for microgrid[J].Electric Power Automation Equipment,2023,43(10):145-151,207 |
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| 摘要: |
| 交直流混合微电网(HMG)联网与优化运行中，常规工频变压器不具备短路故障阻隔和电压综合控制能力。对此，提出一种适用于HMG的混合型联网变压器(HIT)，并构建新型基于混合型联网变压器的交直流混合微电网(HIT-HMG)。介绍了HIT拓扑结构并分析其运行原理，构造新型三柱三绕组工频变压器进行电压等级变换和部分功率传输，由串联变流器实现HMG的电压和电流主动控制。对HIT及串联变流器进行数学建模，建立新型工频变压器的等效磁路模型和等效电路模型。考虑配电网不同位置与故障类型，提出HIT-HMG故障阻隔控制策略。对所提HIT及控制方案进行仿真和实验验证，结果表明通过控制HIT的串联绕组电压，可以阻隔中高压配电网故障对HMG的影响。 |
| 关键词: 交直流混合微电网 工频变压器 变流器 故障阻隔 协调控制 |
| DOI：10.16081/j.epae.202309009 |
| 分类号:TM41;TM46 |
| 基金项目:国家自然科学基金资助项目(52007010)；强电磁工程与新技术国家重点实验室开放课题(AEET2022KF003) |
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| Hybrid interlinking transformer and its fault blocking coordination control for microgrid |
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YIN Xin1, LAI Jinmu2, YIN Xianggen3, WANG Yaoqiang2, YIN Yue2, HU Jiaxuan3
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1.School of Automation, Wuhan University of Technology, Wuhan 430070, China;2.School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China;3.School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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| Abstract: |
| In the interconnection and optimization operation of AC/DC hybrid microgrid(HMG),the conventional power-frequency transformer does not have the ability to block short-circuit faults and comprehensively voltage control. To solve this problem, a hybrid interlinking transformer(HIT) suitable for HMG is proposed, and the novel HMG based on HIT(HIT-HMG) is constructed. The typology structure and the operating pri-nciple of HIT are introduced. The novel three-limb three-winding power-frequency transformer is constructed to transform voltage level and transmit power, and achieves HMG voltage and current active control via the series converter. The mathematical models of the HIT and the series converter are built. The equivalent magnetic circuit and equivalent electrical circuit models are established. With considering of different fault locations and fault types of distribution network, a fault blocking coordination control strategy for the proposed HIT-HMG is proposed. The simulation and experiment are carried out to verify the proposed HIT and control strategy. The results show that, the impact of medium and high voltage distribution network faults on the HMG can be isolated by controlling the series winding voltage of HIT. |
| Key words: AC/DC hybrid microgrid power-frequency transformer electric converters fault blocking coordination control |
