基于实时分类负荷模型的受端电网电压稳定问题研究

Voltage stability research of receiving-end network based on real-time classification load model

电压稳定问题已成为北京、上海和广州等受端大负荷中心系统共同的潜在威胁。为研究受端电网电压稳定问题,本文以广州电网为例,通过仿真分析,揭示受端电网两种不同程度暂态电压失稳模式,即系统暂态电压失稳和局部暂态电压失稳,其失稳特征与机理与负荷中的电动机特性密切相关。为提高负荷模型的可信度,本文提出一种实时分类负荷模型建模方法,并以广州电网实际发生的单相短路故障为算例进行了仿真验证。结果表明,该建模方法有效可行,建立的模型可信。

Voltage stability has become common potential threat of receiving-end load centre power grid such as Beijing,Shanghai,Guangzhou,ect.In order to analysis voltage stability of receiving-end grid,take Guangzhou power grid as an example,through simulation analysis,it reveals two different degree transient voltage instability mode of receiving-end grid:the system transient voltage instability and local transient voltage instability.In order to improve the reliability of the load model,this paper puts forward a method to establish real-time classification load model.Take a actual single phase short circuit fault in guangzhou power grid as an example,the simulation results show that the proposed modeling method is effective and feasible.