ICS 29.160.99 CCS F 20 备案号： 53939-2016 准 T/CEC 681—2022 同步发电机中性点接地系统参数 试验导则 Test guide for parameters of synchronou s generator neutral grounding system 2022-10-26 发布 2023-02-01 实施 中国电力企业联合会 发 布 《电子编加稿件》 XM95223 责 编 ： 霍 妍 成品： 210*297 责校：马宁 版心： 166*238 字数： 45字*43行 天35 地 24 订 24 切 20 描图： 8张 本书公式录入 全国团体标准信息平台 中国电力企业联合会标准 同步发电机中性点接地系统参数试验导则 T/CEC 681—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 1.25印张 37千字 * 统一书号 155198·4604 定价28.00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 T/CEC 681—2022 全国团体标准信息平台 T/CEC 681—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 试验要求 ······························································································································· ······················· 2 4.1 试验项目 ······························································································································· ················ 2 4.2 试验时机 ······························································································································· ················ 2 4.3 试验条件 ······························································································································· ················ 2 4.4 仪器要求 ······························································································································· ················ 2 4.5 试验数据记录 ······························································································································· ········ 2 5 试验方法 ······························································································································· ······················· 3 5.1 试验接线 ······························································································································· ················ 3 5.2 继电保护配置 ······························································································································· ········ 4 5.3 单元接线试验方法 ······························································································································· ·4 5.4 扩大单元接线试验方法 ························································································································ 5 6 评定标准 ······························································································································· ······················· 7 6.1 单相接地最大故障电流 ························································································································ 7 6.2 位移电压 ······························································································································· ················ 8 6.3 位移电压系数 ······························································································································· ········ 8 附录 A （资料性） 发电机中性点接地装置原理图 ······················································································· 9 附录 B （资料性） 发电机中性点位移电压系数 ························································································· 11 附录 C （资料性）