配电变压器用二次硅钢片性能评估及鉴定

doi:10.11930/j.issn.1004-9649.2016.02.073.05

中国电力 ›› 2016, Vol. 49 ›› Issue (2): 73-77.DOI: 10.11930/j.issn.1004-9649.2016.02.073.05

配电变压器用二次硅钢片性能评估及鉴定

程灵¹，魏剑啸²，马光¹，杨富尧¹，陈新¹，朱承治³

1.国网智能电网研究院电工新材料及微电子研究所，北京 102209;
2.许继集团，河南许昌 461000;
3. 国网浙江省电力公司，浙江杭州 310007

收稿日期:2015-04-17 出版日期:2016-02-18 发布日期:2016-03-21
作者简介:程灵（1988-），男，湖南娄底人，工程师，从事电力变压器用取向硅钢应用技术研究。E-mail: chengling1107@126.com
基金资助:
国家电网公司科技资助项目（SGRI-WD-71-14-002）

Performance Assessment of Used Grain-Oriented Silicon Steel Sheet in Distribution Transformer and Its Inspection Technique

CHENG Ling¹, WEI Jianxiao², MA Guang¹, YANG Fuyao¹, CHEN Xin¹, ZHU Chengzhi³

1. Department of Electrical Engineering New Materials and Microelectronics, State Grid Smart Grid Research Institute,Beijing 102209, China;
2. Xuji Group Corporation, Xuchang 461000, China;
3. State Grid Zhejiang Electric Power Company, Hangzhou 310007, China

Received:2015-04-17 Online:2016-02-18 Published:2016-03-21
Supported by:
This work is supported by Major Program of Hubei Collaborative Innovation Center for High-efficient Utilization of Solar Energy（No.HBSZD2014003）.

摘要/Abstract

摘要： 取向硅钢制成变压器铁芯后直接关系电网的安全性和节能性。对配电变压器铁芯用二次硅钢片的性能进行了全面评估，结果表明，抽取自A地区、B地区及C地区的二次硅钢片的铁损最高可达1.91 W/kg（变压器空载损耗高），磁致伸缩系数λ1.7T高至3.9×10-6（变压器噪音大），表面绝缘电阻最低仅有1~2 Ω·cm2/片（片间绝缘能力降低后直接威胁铁芯安全），涂层附着性为D级甚至更差，产品质量存在严重缺陷。长期使用二次硅钢片会给挂网运行的配电变压器带来严重的质量问题和安全隐患。通过全面检验硅钢片的表面质量、磁性能、涂层性能、组织结构可鉴别出变压器铁芯材质是否为二次硅钢片。

关键词: 配电变压器, 取向硅钢, 性能评估, 鉴定

Abstract: The grain-oriented silicon steel, once being processed into transformer core, has a direct impact on power network’s energy use and safety. This paper provides a thorough evaluation of the properties of used silicon steel. Our results show that serious product quality issues exist with used silicon steel sheet. For sample sheets from three regions of A, B and C, the highest core loss (P1.7) was 1.91 W/kg (high no load losses), the highest magnetostrictive coefficient (λ1.7T) was 3.9×10-6 (high noise), the lowest surface insulation resistance was only 1~2 Ω·cm2 per sheet(low insulation between sheets is a direct threat on the safety of the steel core), and the coating adhesive property was at D level or worse. The sustained use of used silicon steel in grid connected transformers presents a serious quality and safety concern. Whether or not the transformer core was made from used silicon steel can be determined through a comprehensive inspection of the surface quality, magnetic performance, coating property and microstructure of the silicon steel sheet.

Key words: distribution transformer, grain-oriented silicon steel, performance evaluation, inspection

中图分类号:

TM275

程灵，魏剑啸，马光，杨富尧，陈新，朱承治. 配电变压器用二次硅钢片性能评估及鉴定[J]. 中国电力, 2016, 49(2): 73-77.

CHENG Ling, WEI Jianxiao, MA Guang, YANG Fuyao, CHEN Xin, ZHU Chengzhi. Performance Assessment of Used Grain-Oriented Silicon Steel Sheet in Distribution Transformer and Its Inspection Technique[J]. Electric Power, 2016, 49(2): 73-77.

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https://www.electricpower.com.cn/CN/Y2016/V49/I2/73

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配电变压器用二次硅钢片性能评估及鉴定

Performance Assessment of Used Grain-Oriented Silicon Steel Sheet in Distribution Transformer and Its Inspection Technique

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配电变压器用二次硅钢片性能评估及鉴定

Performance Assessment of Used Grain-Oriented Silicon Steel Sheet in Distribution Transformer and Its Inspection Technique

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