电网的直流电压

[中文适用范围]： 本文件提供了直流电压高于1.5 kV的高压直流（HVDC）电网的推荐直流电压系列。它涉及多端HVDC电力传输和分配系统以及网状HVDC网络的标称直流电压选择，而不是额定直流电压或最高直流电压。 对于任何独立的（不构成直流电网的一部分）HVDC项目（例如点对点HVDC电力传输和分配系统），没有严格要求考虑此直流电压系列进行直流电压选择。然而，为了促进未来向更大HVDC系统的进展，使用标准化的直流电压非常有用。 在后期阶段，对于多端系统和网状HVDC电网，使用协调电压确实变得至关重要，以优化资本和运营成本。此外，对于全新项目，系统规划应包括这一展望，并可以从推荐的直流电压系列的使用中受益。 [外文原描述]： IEC TS 63471:2023 provides a recommended DC voltage series for HVDC grids with a DC voltage above 1,5 kV. It concerns the selection of a nominal DC voltage of multi-terminal HVDC power transmission and distribution systems and meshed HVDC networks, grids, rather than a rated DC voltage or highest DC voltage. There is no stringent requirement to consider this DC voltage series for the DC voltage selection for any stand-alone (not forming part of DC Grid) HVDC projects, e.g. a point-to-point HVDC power transmission and distribution system. However, in order to facilitate the later progression towards larger HVDC systems in the future the use of standardized DC voltages is very useful. At later stages, with multi-terminal systems and meshed HVDC grids, the use of harmonized voltages will indeed become essential in order to optimize both capital and operational costs. Also, for entirely new projects, system planning should include this outlook and can benefit from the use of the recommended DC voltage series.