高压直流（HVDC）换流站功率损耗的测定

[中文适用范围]： 本文件适用于所有用于电力系统功率交换（输电或背靠背安装）的具有线路换相换流器（LCC）以及电压源换流器（VSC）的高压直流（HVDC）换流站。对于线路换相换流器（LCC），本文件假定使用12脉动晶闸管换流器，但也可经适当修改后用于6脉动晶闸管换流器。当本文件中提及VSC时，假定其为MMC型或类似类型，具有非常低的谐波产生。其他类型的VSC应酌情处理。在某些应用中，同步补偿器、静止无功补偿器（SVC）或静止同步补偿器（STATCOM）连接到HVDC换流站的交流母线。此类设备的损耗确定程序不包括在本文件中。本文件提供了一套用于确定HVDC换流站总损耗的标准程序，除了VSC阀（由IEC 62751系列涵盖）之外。程序涵盖除上述之外的所有部件，并涉及空载运行和运行损耗及其计算方法，计算方法尽可能使用实测参数。与本文假定的典型设计相比，采用新颖组件或电路配置的换流站设计，或配备可能影响损耗的异常辅助电路的设计，应以其自身特点进行评估。 [外文原描述]： IEC 61803:2026 applies to all high-voltage direct current (HVDC) converter stations with line-commutated converters (LCC) as well with voltage-sourced converters (VSC) used for power exchange (power transmission or back-to-back installation) in utility systems. For line-commutated converters (LCC), this document presumes the use of 12-pulse thyristor converters but can, with due care, also be used for 6-pulse thyristor converters. Where VSC is referred to in this document, it is assumed to be of the MMC-type or similar, with very low harmonic generation. It is important to treat other types of VSC as appropriate. In some applications, synchronous compensators, static var compensators (SVC), or static synchronous compensator (STATCOM) are connected to the AC bus of the HVDC converter station. The loss determination procedures for such equipment are not included in this document. This document presents a set of standard procedures for determining the total losses of an HVDC converter station, except for VSC valves which are covered by the IEC 62751 series. The procedures cover all parts, except as noted above, and address no-load operation and operating losses together with their methods of calculation which use, wherever possible, measured parameters. Converter station designs employing novel components or circuit configurations compared to the typical design assumed in this document, or designs equipped with unusual auxiliary circuits that can affect the losses, are assessed on their own merits. This edition includes the following significant technical changes with respect to the previous edition: a) HVDC stations with voltage-sourced converters (VSC) technology have been included; b) to facilitate the application of this document and to ensure its quality remains consistent, 5.1.8 and 5.8 have been reviewed, taking into consideration that the present thyristor production technology provides considerably less thyristor parameters dispersion comparing with the situation in 1999 when the first edition of IEC 61803 was developed; therefore, the production records of thyristors can be used for the power losses calculation; c) the calculation of the total station load losses (cases D1 and D2 in Annex C) has been corrected.