AI 中文总结
研究在电压约束下通过调整VSC-HVDC站有功功率设定点来最大化电网负荷能力的方法，利用换流器能力极限几何结构推导最优设定点闭式表达式，经北欧测试系统验证有效且对角度估计不确定性有鲁棒性。
AI 中文摘要
电压源换流器高压直流（VSC-HVDC）链路提供可控的有功和无功功率输出，使其成为应急电压支持的有前景资产。本文提出一种分析方法，用于调整VSC-HVDC站的有功功率设定点，以在电压 stressed 条件下最大化负荷能力。通过利用换流器能力极限的几何结构，在电流和电压联合约束下推导了最优设定点的闭式表达式。该方法需要局部电压测量和广域电压角度差估计，适用于无需全局优化的实时应急控制。在北欧测试系统上的验证证实，分析预测的最优值与产生最高负荷能力的设定点一致，且有功功率设定点调整可使负荷能力超比例增加。结果还表明对角度估计不确定性具有鲁棒性。
英文摘要
Voltage-source converter high-voltage direct current (VSC-HVDC) links offer controllable active and reactive power output, making them a promising asset for emergency voltage support. This paper presents an analytical method for adjusting the active power setpoint of a VSC-HVDC station to maximise loadability during voltage-stressed conditions. By exploiting the geometric structure of converter capability limits, a closed-form expression for the optimal setpoint is derived under combined current and voltage constraints. The method requires local voltage measurements and an estimate of a wide-area voltage angle difference, making it suitable for real-time emergency control without global optimisation. Validation on the Nordic Test System confirms that the analytically predicted optimum is consistent with the setpoint yielding the highest loadability, and that adjustments of active power setpoint can yield a more-than-proportional increase in loadability. The results further indicate robustness to angle estimate uncertainty.
CommentsAccepted for 8th International Conference on Smart Energy Systems and Technologies (SEST26) in Ciudad Real, 6 pages, 8 figures
DOI：10.1109/SEST67798.2026.11712298
