| 引用本文: | 宋开胜,王华芳,马宏忠,许洪华,刘宝稳,吴书煜,顾苏雯,杨庆福.10 kV配电变压器自动调压的研究以及试验分析[J].电力自动化设备,2019,39(4): |
| SONG Kaisheng,WANG Huafang,MA Hongzhong,XU Honghua,LIU Baowen,WU Shuyu,GU Shuwen,YANG Qingfu.Research and experimental analysis on automatic voltage regulation of 10 kV distribution transformer[J].Electric Power Automation Equipment,2019,39(4): |
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| 摘要: |
| 针对配电变压器机械式有载调压装置复杂、调压不方便等问题，提出一种基于电力电子开关的5档自动调压技术方案。采用启动保护电路，避免电力电子开关承受合闸电压和励磁涌流冲击，保证电力电子开关退出时变压器的正常运行；考虑变压器高压侧绕组不同接线方式，分析开关器件两端承受的电压以及分接头对地电压的分布情况，为电力电子开关器件的参数选择提供参考。结果表明高压侧为星形接线的中性点调压方式更加有利于电力电子器件的工作，高压侧为三角形接线的中部调压方式对于电力电子器件的工作电压以及隔离电压均有较高的要求。在完成电路设计与器件选型的基础上，研制了基于电力电子开关的自动有载调压变压器，并安装于现场试运行。理论研究、仿真分析、样机试验以及上网试运行均表明所提方案具有可行性与可靠性。 |
| 关键词: 配电变压器 电力电子开关 自动调压 星三角连接 启动保护 |
| DOI：10.16081/j.issn.1006-6047.2019.04.005 |
| 分类号:TM421 |
| 基金项目:国网江苏省电力有限公司科技项目(J2017069) |
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| Research and experimental analysis on automatic voltage regulation of 10 kV distribution transformer |
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SONG Kaisheng1, WANG Huafang2, MA Hongzhong1, XU Honghua2, LIU Baowen1, WU Shuyu1, GU Shuwen1, YANG Qingfu3
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1.College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China;2.State Grid Jiangsu Electric Power Co.,Ltd. Nanjing Power Supply Company, Nanjing 210008, China;3.Jiangsu Hongyuan Electric Co.,Ltd.,Nanjing 211103, China
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| Abstract: |
| Aiming at the problems of complicated mechanical on-load voltage regulator device and inconvenient voltage regulation of distribution transformer, a five-speed automatic voltage regulation scheme based on power electronic switch is proposed. The start-protection circuit is used to prevent the power electronic switch from being subjected to impulse voltage and magnetizing inrush current and ensure the normal work for distribution transformer when the power electronic switch exits. Considering different wiring modes of the primary side of transformer, the distribution of voltage between two sides of switching devices and voltage between tap and ground are analyzed to provide a reference for parameter selection of power electronic switching devices. The results show that the neutral point voltage regulation mode with star connection on primary side is more conducive to the operation of power electronic devices, and the middle voltage regulation mode with delta connection on primary side has higher requirements on working voltage and isolation voltage of power electronic devices. On the basis of circuit design and device selection, an automatic on-load tap-changer based on power electronic switch is developed and installed in the field trial operation. Theoretical research, simulation analysis, prototype test and online trial operation show the feasibility and reliability of the proposed scheme. |
| Key words: distribution transformer power electronic switch automatic voltage regulation star connection and delta connection start-protection |
