串接小容量变压器预充磁技术参数设计

Parameter design of series small-capacity transformer pre-magnetizing technology

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摘要串接小容量变压器预充磁涌流抑制技术在船舶电力系统中应用广泛,但缺乏规范化的参数设计方法。推导了串接小容量变压器预充磁技术各次合闸最大励磁涌流峰值解析计算公式。基于此,以预充磁变压器合闸励磁涌流峰值小于系统额定电流,工作变压器合闸励磁涌流峰值小于差动保护启动值为原则确定可选预充磁变压器容量范围;从海洋核动力平台安全性、经济性角度出发规范预充磁电路结构;基于实际建立磁通与预期磁通相位一致原则规范预充磁变压器绕组接线方式;提出相邻周期涌流能量比方法计算变压器建立稳态磁通所需时间,规范预充磁最短合闸时间间隔。MATLAB/Simulink仿真结果表明,在不同合闸角、剩磁情况下,所设计的参数能够保证预充磁合闸过程中变压器差动保护可靠不误动。 Inrush current suppression technology based on the series small-capacity transformer pre-magnetizing technology is widely used in the shipboard power system,but it lacks a standardized parameter design method.The analytical formula of the maximum magnetizing inrush current peak value in each breakerclosing stage is given.On this basis,the optional capacity range of the Pre-T(Pre-magnetizing Transformer)is determined on the principle that the peak magnetizing inrush current of closing Pre-T is less than the rated current of the system,and the peak magnetizing inrush current of closing the working transformer is less than the starting value of the differential protection.The structure of the pre-magnetizing circuit is standardized from the aspects of security and economy of floating nuclear power plant.Based on the phase consistency principle of the established actual magnetic flux and the expected magnetic flux,the wiring mode of the Pre-T is disciplined.An adjacent inrush current energy ratio method is proposed to calculate the required time for the transformer to establish steady magnetic flux,and to regulate the minimum closing time interval of pre-magnetizing.MATLAB/Simulink simulative results show that under different closing angles and remanence,the design parameters can ensure that the transformer differential protection does not misoperate in the process of pre-magnetizing breaker-closing.

作者王义凯尹项根乔健谭力铭卢庆辉吴大立 WANG Yikai;YIN Xianggen;QIAO Jian;TAN Liming;LU Qinghui;WU Dali(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Electric Power Security and High Efficiency Key Laboratory,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan Second Ship Design and Research Institute,Wuhan 430064,China)

机构地区华中科技大学强电磁工程与新技术国家重点实验室华中科技大学电力安全与高效湖北省重点实验室武汉第二船舶设计研究所

出处《电力自动化设备》 EI CSCD 北大核心 2022年第9期197-202,共6页 Electric Power Automation Equipment

基金国家自然科学基金资助项目(51877089) 国家重点研发计划项目(2017YFC0307800)。

关键词串接小容量变压器预充磁海洋核动力平台容量范围合闸时间间隔 series small-capacity transformer pre-magnetizing floating nuclear power plant capacity range closing time interval

分类号 TM402 [电气工程—电器]

作者简介王义凯(1996-),男,博士研究生,研究方向为电力系统继电保护(E-mail:742657004@qq.com);尹项根(1954-),男,教授,博士研究生导师,博士,主要研究方向为电力系统继电保护与安全自动控制(E-mail:xgyin@hust.edu.cn);通信作者:乔健(1997-),男,博士研究生,研究方向为电力系统继电保护(E-mail:906982507@qq.com)。