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首页> 外文期刊>Electric power systems research >A communication-free reactive-power control strategy in VSC-HVDC multi - terminal systems to improve transient stability
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A communication-free reactive-power control strategy in VSC-HVDC multi - terminal systems to improve transient stability

机译：VSC-HVDC多终端系统中的无通信无功功率控制策略，可提高瞬态稳定性

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摘要

This paper proposes a new reactive-power control strategy for High Voltage Direct Current multi-terminal systems with Voltage Source Converter stations (VSC-HVDC) to improve transient stability in electric power transmission systems. The proposed algorithm uses local measurements to estimate, in each converter station, a weighted average of the frequencies seen by the VSC stations of the HVDC multi-terminal system. This estimation is carried out making use of a (small) auxiliary local active-power modulation along with the DC-side voltage droop control in the VSC stations, where the latter also uses local measurements only. The estimated frequency is used as the set point for supplementary reactive-power control at each converter station. The proposed control law has been simulated in a test system using PSS/E and the results show that it improves transient stability, significantly, producing similar results to those obtained controlling reactive power using global measurements.
机译：本文针对具有电压源换流站（VSC-HVDC）的高压直流多端子系统提出了一种新的无功控制策略，以提高电力传输系统的暂态稳定性。所提出的算法使用本地测量来估计每个换流站中HVDC多终端系统的VSC站看到的频率的加权平均值。此估算是通过在VSC站中使用（小型）辅助本地有功功率调制和DC侧电压下降控制来进行的，后者也仅使用本地测量。估算的频率用作每个换流站辅助无功功率控制的设定点。拟议的控制律已在使用PSS / E的测试系统中进行了仿真，结果表明，该控制律显着提高了瞬态稳定性，产生的结果与使用全局测量控制无功功率获得的结果相似。

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