标准摘要
[中文适用范围]： IEC 60071-12 适用于电网换相换流器（LCC）高压直流（HVDC）项目换流站绝缘配合的程序指南，其目的是评估换流站设备所承受的直流、工频、谐波和冲击电压的联合过电压应力，并确定设备的规定耐受电压。本文档仅涉及现代高压直流换流站中使用的无间隙金属氧化物避雷器，并提出了确定串联和/或并联避雷器组合保护水平的标准。文中给出了典型的避雷器保护方案及避雷器应力。附录A提供了LCC高压直流换流站绝缘配合的示例，以支持主文中描述的概念和所用基本分析技术。 [外文原描述]： IEC 60071-12:2022 applies guidelines on the procedures for insulation co-ordination of line commutated converter (LCC) stations for high-voltage direct current (HVDC) project, whose aim is evaluating the overvoltage stresses on the converter station equipment subjected to combined DC, AC power frequency, harmonic and impulse voltages, and determining the specified withstand voltages for equipment. This document deals only with metal-oxide surge arresters, without gaps, which are used in modern HVDC converter stations. The criteria for determining the protective levels of series and/or parallel combinations of surge arresters used to ensure optimal protection are also presented. Typical arrester protection schemes and stresses of arresters are presented. Annex A contains examples of insulation co-ordination for LCC HVDC converters which support the concepts described in the main text, and the basic analytical techniques used.
英文名称Insulation co-ordination - Part 12: Application guidelines for LCC HVDC converter stations