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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多端系统中无通信的无功 - 功率控制策略，以提高瞬态稳定性

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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：本文提出了具有电压源转换器站（VSC-HVDC）的高压直流多终端系统的新型无功 - 功率控制策略，以提高电力传输系统中的瞬态稳定性。所提出的算法使用本地测量来估计，在每个转换器站中，HVDC多终端系统的VSC站所看到的频率的加权平均值。该估计是利用（小）辅助局部有效功率调制以及VSC站中的DC侧电压下降控制，其中后者仅使用本地测量。估计的频率用作每个转换器站的补充反应功率控制的设定点。所提出的控制法已经在使用PSS / E的测试系统中进行了模拟，结果表明它显着提高了瞬态稳定性，从而产生了使用全局测量控制无功功率的结果。

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