针对影响光伏发电系统出力的两个因素(光照辐射强度和光伏组件温度)分别建立相应的时序数学模型。引入运行状态系数(operation state coefficient,OSC)表征设备运行状态对光伏发电系统出力的影响。将光照资源的波动性和设备的运行状态...针对影响光伏发电系统出力的两个因素(光照辐射强度和光伏组件温度)分别建立相应的时序数学模型。引入运行状态系数(operation state coefficient,OSC)表征设备运行状态对光伏发电系统出力的影响。将光照资源的波动性和设备的运行状态相结合,得出光伏发电系统的多状态时序出力模型。采用序贯蒙特卡罗法,对含光伏发电系统的配电网进行可靠性评估,通过不同的指标来衡量光伏发电系统对配电网可靠性的影响。研究表明,光伏发电系统接入配电网后能有效提高配电网的供电可靠性。展开更多
In this paper, online security warning and risk assessment of power grid are proposed, based on data from EMS （Energy Management System）, combined with information of real-time operation state, component status and ...In this paper, online security warning and risk assessment of power grid are proposed, based on data from EMS （Energy Management System）, combined with information of real-time operation state, component status and external operating environment. It combines the two factors, contingency likelihood and severity, that determine system reliability, into risk indices on different loads and operation modes, which provide precise evaluation of the power grid＇s security performance. According to these indices, it can know the vulnerable area of the system and whether the normal operating mode or repair mode is over-limited or not, and provide decision-making support for dispatchers. Common cause outages and equipment-aging are considered in terms of the establishment of outage model. Multiple risk indices are defined in order to reflect the risk level of the power grid more comprehensively.展开更多
文摘针对影响光伏发电系统出力的两个因素(光照辐射强度和光伏组件温度)分别建立相应的时序数学模型。引入运行状态系数(operation state coefficient,OSC)表征设备运行状态对光伏发电系统出力的影响。将光照资源的波动性和设备的运行状态相结合,得出光伏发电系统的多状态时序出力模型。采用序贯蒙特卡罗法,对含光伏发电系统的配电网进行可靠性评估,通过不同的指标来衡量光伏发电系统对配电网可靠性的影响。研究表明,光伏发电系统接入配电网后能有效提高配电网的供电可靠性。
文摘In this paper, online security warning and risk assessment of power grid are proposed, based on data from EMS （Energy Management System）, combined with information of real-time operation state, component status and external operating environment. It combines the two factors, contingency likelihood and severity, that determine system reliability, into risk indices on different loads and operation modes, which provide precise evaluation of the power grid＇s security performance. According to these indices, it can know the vulnerable area of the system and whether the normal operating mode or repair mode is over-limited or not, and provide decision-making support for dispatchers. Common cause outages and equipment-aging are considered in terms of the establishment of outage model. Multiple risk indices are defined in order to reflect the risk level of the power grid more comprehensively.
