ICS 29.180 CCS F 24 备案号： 68965-2019 中华人民共和国电力行业标准 DL/T 2557—2022 换流变压器阀侧交流外施耐压及 局部放电现场试验导则 Guide for on-site test of applied AC voltage withstand with partial discharge measurement on valve winding s of converter transformer 2022-11-04 发布 2023-05-04 实施 国家能源局 发 布 《电子编加稿件》 XM95760 责 编 ：李耀阳 成品： 210*297 责校：王海南 版心： 166*238 字数： 45字*43行 天35 地 24 订 24 切 20 描图： 6个 中华人民共和国 电力行业标准 换流变压器阀侧交流外施耐压及 局部放电现场试验导则 DL/T 2557—2022 * 中国电力出版社出版、印刷、发行 （北京市东城区北京站西街 19号 100005 http://www.cepp.sgcc.com.cn ） * 2023年2月第一版 2023年2月北京第一次印刷 880毫米× 1230毫米 16开本 1印张 31千字 * 统一书号 155198·4601 定 价23.00元 版 权 专 有 侵 权 必 究 本书如有印装质量问题，我社营销中心负责退换 DL/T 2557—2022 DL/T 2557—2022 I 目 次 前言 ······························································································································· ···································· II 1 范 围 ······························································································································· ······························· 1 2 规范性引用文件 ······························································································································· ··········· 1 3 术语和定义 ······························································································································· ··················· 1 4 试验方法与接线 ······························································································································· ··········· 1 5 试验条件 ······························································································································· ······················· 1 6 试验设备 ······························································································································· ······················· 3 7 试验程序 ······························································································································· ······················· 4 8 试验合格判据 ······························································································································· ··············· 5 9 干扰源识别抑制 ······························································································································· ··········· 5 附录 A （资料性） 无晕试验区域推荐范围 ··································································································· 7 附录 B （资料性） 均压环与加压引线的典型参数 ························································································ 8 附录 C （资料性） 换流变压器阀侧交流外施耐压及局部放电试验出厂试验电压典型试验参数 ············ 10 附录 D （资料性） 试验记录表 ····················································································································· 11 DL/T 2557—2022 II 前 言 本文件按照 GB/T 1.1 —2020《标准化工作导则 第 1部分：标准化文件的结构和起草规则》的规定 起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。 本文件由中国电力企业联合会提出。 本文件由电力行业高压试验技术标准化技术委员会现场检测分技术委员会（ DL/TC 14/SC 1 ）归口。 本文件起草单位：国网湖北省电力有限公司电力科学研究院、苏州华电电气股份有限公司、广州西 门子变压器有限公司、江苏盛华电气有限公司、国网智能电网研究院有限公司、国网电力科学研究院武汉南瑞有限责任公司、中国南方电网有限责任公司超高压输电公司、国网青海省电力公司电力科学研究院、吴江变压器有限公司、国网经济技术研究院有限公司、天威保变（秦皇岛）变压器有限公司、常州西电变压器有限责任公司。 本文件主要起草人：吴传奇、刘睿、姜杏辉、吕晓东、黄天顺、卢理成、陈隽、杜振波、周海滨、 王瑞珍、曲全磊、孙健、吴彤、郑宇光、董杰、徐华。 本文件为首次发布。 本文件在执行过程中的意见或建议反馈至中国电力企业联合会标准化管理中心（北京市白广路二条 一号， 100761）。 DL/T 2557—2022 1 换流变压器阀侧交流外施耐压及局部放电现场试验导则 1 范 围 本文件规定了换流变压器阀侧交流外施耐压及局部放电现场试验的试验方法与接线、试验条件、试 验设备、试验程序、试验合格判据、干扰源识别抑制等要求。 本文件适用于采用串联谐振试验方法进行的换流变压器阀侧交流外施耐压及局部放电现场试验。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件， 仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件。 GB/T 7354 高电压试验技术 局部放电测量 GB/T 13498 高压直流输电术语 DL/T 417 电力设备局部放电现场测量导则 DL/T 849.6 电力设备专用测试仪器通用技术条件 第6部分：高压谐振试验装置 DL/T 1798 换流变压器交接及预防性试验规程 3 术语和定义 GB/T 13498 界定的术语和定义适用于本文件。 4 试验方法与接线 4.1 试验方法 试验采用变频电源，通过励磁变压器和由谐振电抗器、被试换流变压器组成的串联谐振回路进行升 压，使换流变压器被试阀绕组对地达到试验电压要求。试验过程中，同时在换流变压器被试阀绕组两