IEC 60071-11:20 22适用于高压直流(HVDC)系统。它规定了确定这些系统的设备和装置的规定耐压、爬电距离和空气间隙的程序原则。 本文件给出了与线路换流变流器（LCC）和电压源变流器（VSC）HVDC系统相关的绝缘协调原则。本文的主要原理也适用于LCC的其他特殊变换器配置，如电容换向变换器（CCC）以及受控串联补偿变换器（CSCC）等。 本文件适用于换流器交流母线（包括交流谐波滤波器、换流变压器、断路器）与直流线路侧连接设备的绝缘配合。影响换流站设备绝缘协调的线路和电缆终端也包括在内。 本文件仅适用于电力系统中的HVDC应用，不适用于工业转换设备。给出的原则和指南仅用于绝缘协调目的。本文件未涵盖人体安全要求。 本国际标准与IEC 60071-12一起取代了2014年发布的IEC 60071-5。 本版本包括以下与IEC 60071相关的重大技术变更？5:2014: 本标准适用于LCC和VSC HVDC系统，而IEC 60071-5仅涉及LCC HVDC系统； 附录C（规范性）给出了推荐的规定耐压（LI和SI）； 附录C（规范性）给出了最小空气间隙； 附录E显示了本标准与IEC 60071-5:20 14之间条款的相关性。

IEC 60071-11:2022 applies to high-voltage direct current (HVDC) systems. It specifies the principles on the procedures for the determination of the specified withstand voltages, creepage distance and air clearances for the equipment and the installations of these systems.
This document gives the insulation co-ordination principles related to line commutated converter (LCC) and voltage sourced converters (VSC) HVDC systems. The main principles of this document also apply to other special converter configurations of LCC, such as the capacitor commutated converter (CCC) as well as the controlled series compensated converter (CSCC), etc.
This document applies to insulation co-ordination of equipment connected between the converter AC bus (including the AC harmonic filters, the converter transformer, the circuit breakers) and the DC line side. The line and cable terminations in so far as they influence the insulation co-ordination of converter station equipment are also covered.
This document applies only for HVDC applications in power systems and not for industrial conversion equipment. Principles and guidance given are for insulation co-ordination purposes only. The requirements for human safety are not covered by this document.
This international standard replaces, in conjunction with IEC 60071-12, IEC 60071-5 published in 2014.
This edition includes the following significant technical changes with respect to IEC 60071？5:2014:

1. This standard applies to both LCC and VSC HVDC systems whereas IEC 60071-5 only dealt with LCC HVDC system;
2. Annex C (normative) gives the recommended specified withstand voltage (LI and SI);
3. Annex C (normative) gives the minimum air clearances;
4. Annex E shows the correlation of clauses between this standard and IEC 60071-5:2014.