作　　者： ; ; ; ;

机构地区： 西安交通大学电气工程学院

出　　处： 《电力系统保护与控制》 2011年第8期143-154,共12页

摘　　要： 短期可靠性评估是监测、量度、预测电力系统短期运行风险的有效工具。电力市场化改革、大规模风电接入与极端天气变化严重影响了电力系统短期可靠性水平。针对短期可靠性评估元件模型、评估框架与指标体系三个方面内容进行了论述。综述了输电线路、发电机以及净负荷的短期可靠性模型,并在输电线路模型中重点考虑了天气状况影响、可靠性的模糊表征、计及暂态稳定性的影响等。总结了三类可靠性评估特征与短期可靠性分析过程,考虑了短期可靠性安全性分析、连锁反应事故防范以及特殊保护方案制定。从系统状态、影响程度等多个角度对短期可靠性指标体系进行了归纳分析。进一步指出短期可靠性评估未来的研究重点及方向。 Short-term reliability evaluation is an effective tool for monitoring,measuring and forecasting short-term risks of power systems.Electricity market-oriented reform,large-scale wind energy conversion system（WECS）switch-in and changes of extreme weather heavily influence the power system reliability level.A comprehensive research on short-term reliability assessment is conducted,including short-term reliability component models,evaluation frame and indices.Short-term power transmission line model,short-term generator model and net load model are discussed in detail.The influence of weather conditions,fuzzy characteristic and transient stability are taken into account in the line model.The character of three types of reliability evaluations and analysis process of short-term reliability evaluation are investigated,and security analysis,prevention of cascading events and designing of special protection schemes are also considered.Indices of short term reliability evaluation are summarized in several perspectives,such as states,impacts and so on.Moreover,several important aspects which need to be further studied and direction in short-time reliability assessment are proposed.

关 键 词： 短期可靠性评估 短期可靠性元件模型 电力市场 大规模风电接入 极端天气

领　　域： [电气工程]