含风电场的受端系统暂态电压稳定性评估

摘要

考虑风电场的自身特性和受端系统的结构特点，对含双馈风电场的受端系统暂态电压稳定性进行了评估。从严重度和可能性的角度提出了电压严重度和故障极限切除时间两个衡量暂态电压稳定性的指标。以所提指标为基础，重点考虑风速扰动和故障扰动的因素，研究了故障点位置、风电穿透率与受端系统暂态电压稳定之间的定性关系，并量化了暂态电压失稳的风险。在DIgSILENT/PowerFactory仿真平台中搭建的含风电场的受端系统算例评估结果验证了所提方法的有效性。%Considering the characteristics of wind farm and the structural features, receiving-end grid, the transient voltage stability of receiving-end grid incorporating with doubly-fed wind farm is evaluated. This paper proposes two indexes which are voltage severity and critical clearing time to evaluate transient voltage stability from the perspective of severity and possibility. Based on the proposed indexes, the qualitative relationship between fault point location, wind power penetration rate and transient voltage stability of receiving end grid considering wind speed disturbance and fault disturbance is studied and instability risk of transient voltage is quantified. Results of assessment for receiving end grid incorporating wind farm built in DIgSILENT/PowerFactory simulation platform verify the effectiveness of the proposed method.