大规模可再生能源可以通过半波长输电线路实现远距离传输.本文针对考虑大规模风电外送场景的半波长传输系统提出了一种改进的稳态电压控制方法.首先,基于长线路分布参数模型推导出半波长线路特殊的电压分布规律.在二级电压控制层面,基于其电压特性,提出考虑对主导节点电压参考值跟踪的同时,通过限制半波长线路的无功传输实现对沿线稳态过电压的抑制.考虑风电不确定性及波动性,提出半波长线路过电压风险评估方法,根据不同过电压风险等级确定差异化的电压控制策略.仿真结果表明,所提出的电压控制方法可以有效跟踪主导节点电压参考值,并显著地降低不同风电渗透率场景下半波长线路的过电压风险.“,”Half-wavelength transmission can transmit large-scale renewable energy over very long distances.This paper proposes an improved steady-state voltage-control method for half-wavelength transmission systems considering large-scale wind-power transmission.First,the unique voltage characteristics of half-wavelength lines are deduced based on the distributed parameter model.In the secondary voltage-control level,reactive power-transmission limits of half-wavelength lines are introduced as another control objective except for tracing the pilot bus voltage reference.Considering the uncertainty and fluctuation of wind power,the overvoltage risk-assessment method of half-wavelength lines is presented to determine specific voltage-control strategies.Simulation results demonstrate that the proposed voltage-control method delivers superior tracking performance according to a voltage reference value and prevents the overvoltage risk of half-wavelength lines effectively in different wind-power penetrations.