高压开关设备和控制设备 第318部分：额定电压100kV及以上的直流气体绝缘金属封闭开关设备

[中文适用范围]： 本部分 IEC 62271 规定了气体绝缘金属封闭开关设备的要求，其中绝缘至少部分由除大气压力下的空气以外的绝缘气体或气体混合物获得，用于额定电压包括和高于 100 kV 的直流电，适用于室内和室外安装。本文件包括使用条件、额定值、设计和构造要求的规则。对于直流开关设备的开发和制造，本文件定义了型式试验和例行试验的试验要求和通过标准。 出于本文件的目的，术语“DC GIS”和“DC switchgear”用于指代“直流气体绝缘金属封闭开关设备”。 本规范适用于高压直流（HVDC）系统中的线路换向转换器（LCC）和电压源转换器（VSC）。 本文件涵盖的直流气体绝缘金属封闭开关设备由旨在直接连接在一起并仅能以此方式运行的各个组件组成。 本文件补充并修订（如适用）适用于构成直流气体绝缘金属封闭开关设备的各个组件的各种相关文件。 [外文原描述]： IEC TS 62271-318:2024 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC TS 62271-318:2024 EXV includes the content of the references made to IEC TS 62271-5:2024. IEC TS 62271-318:2024 specifies requirements for gas-insulated metal-enclosed switchgear in which the insulation is obtained, at least partly, by an insulating gas or gas mixture other than air at atmospheric pressure, for direct current of rated voltages including and above 100 kV, for indoor and outdoor installation. This document includes rules for service conditions, ratings, design, and construction requirements. Test requirements and criteria for proof for passing type and routine tests are defined in this document for development and manufacturing of DC switchgear. For the purpose of this document, the terms "DC GIS" and "DC switchgear" are used for "DC gas-insulated metal-enclosed switchgear". This specification is applicable for both Line Commutated Converter (LCC) and Voltage Sourced Converter (VSC) for HVDC systems. The DC gas-insulated metal-enclosed switchgear covered by this document consists of individual components intended to be directly connected together and able to operate only in this manner. This document completes and amends, if applicable, the various relevant documents applying to the individual components constituting DC gas-insulated metal-enclosed switchgear.