Abstract Compared with the pseudo bipolar Voltage Source Converter (VSC) based High Voltage Direct Current (HVDC) (VSC-HVDC) grid, the true bipolar VSC-HVDC grid with series voltage source converters is more flexible and reliable. Based on the analysis of structure and power distribution in the true bipolar VSC-HVDC grid, the node admittance matrices and a representation method of the converter station losses are first derived. Then, with various station-level control strategies of VSC taken into account, a layer-based power flow calculation method suitable for true bipolar VSC-HVDC grids in both symmetric and asymmetric operation is proposed. Finally, the applicability and accuracy of the proposed power flow calculation method are verified by a true bipolar VSC-HVDC grid model built in PSCAD.

中文翻译：

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不同运行模式和控制策略的真双极VSC-HVDC电网潮流计算方法研究

摘要 与基于伪双极电压源换流器（VSC）的高压直流（HVDC）（VSC-HVDC）电网相比，串联电压源换流器的真双极VSC-HVDC电网更加灵活可靠。基于对真实双极VSC-HVDC电网结构和功率分布的分析，首先推导出节点导纳矩阵和换流站损耗的表示方法。然后，考虑到VSC的各种站级控制策略，提出了一种适用于对称和非对称运行的真正双极VSC-HVDC电网的分层潮流计算方法。最后，通过在 PSCAD 中构建的真正双极 VSC-HVDC 电网模型验证了所提出的潮流计算方法的适用性和准确性。