QGDW11674.2-2024高压直流工程成套设计规程第2部分：主接线设计与主回路计算

ICS 29.240.10 CCSF 21 备案号：68965-2019 国家电网有限公司企业标准 Q/GDW 11674.2—2024 高压直流工程成套设计规程 第 2 部分：主接线设计与主回路计算 SystemdesignstandardforHVDCprojects— Part2:Maincircuitdesignandparametercalculation XM104555 责编：陈倩 成品：210*297 责校：郝军燕 版心：166*238 字数：45*43行 天 35 地 24 订 24 切 20 描图： 2024-12-31 发布 2024-12-31 实施 国家电网有限公司 发布 Q/GDW 11674.2—2024 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 符号······························································································································································ 1 5 主接线设计 ·················································································································································· 2 5.1 一般原则 ··············································································································································· 2 5.2 直流开关场设计 ··································································································································· 3 5.3 换流变压器与交流电网的连接 ············································································································ 3 5.4 交流滤波器与交流电网的连接 ············································································································ 4 5.5 共用接地极设计 ··································································································································· 4 6 主回路参数计算 ·········································································································································· 4 6.1 一般原则 ··············································································································································· 4 6.2 主回路参数计算流程 ···························································································································· 4 6.3 换流变压器短路阻抗确定 ···················································································································· 4 6.4 平波电抗器电感值确定 ························································································································ 5 6.5 主回路电阻 ··········································································································································· 5 6.6 控制和测量偏差 ··································································································································· 6 6.7 额定理想空载直流电压 ························································································································ 7 6.8 直流电压运行范围 ································································································································7 6.9 直流电流运行范围 ································································································································7 6.10 理想空载直流电压限制值 ·················································································································· 8 6.11 换流变压器容量计算 ·························································································································· 9 6.12 换流变压器分接开关挡位 ·················································································································· 9 6.13 换相角计算 ······································································································································· 10 6.14 无功功率计算 ··································································································································· 10 7 直流系统运行特性的计算 ························································································································· 10 附录 A （资料性） 直流工程典型主接线图································································································· 11 附录 B （资料性） 防覆冰运行方式和融冰运行方式示例·········································································· 15 附录 C （资料性） 共用接地极接线方案····································································································· 16 附录 D （资料性） 直流工程典型运行特性表····························································································· 17 编制说明·························································································································································· 19 I