借助联络线可用传输容量(available transfer capability,ATC)来评估跨区电网的通道传输能力,可能导致据此得到的联络线计划与子区域的运行条件不匹配或引起额外的再调度成本。提出了一种基于广域和邻域时段组合的联络线功率可行域分析...借助联络线可用传输容量(available transfer capability,ATC)来评估跨区电网的通道传输能力,可能导致据此得到的联络线计划与子区域的运行条件不匹配或引起额外的再调度成本。提出了一种基于广域和邻域时段组合的联络线功率可行域分析方法,可以更好地适应日前调度的场景需求。首先,借助多面体投影理论分析了时段耦合关系对可行域计算的影响,并提出应对思路。然后,针对日前调度跨时段耦合的特点,设计了广域和邻域时段组合的策略并构造可行域模型,兼顾时段跨度较大的耦合约束以及相邻时段的耦合约束的影响,将广域和邻域时段可行域的计算结果合成得到日前调度各时段的联络线功率可行域。最后,基于118节点系统比对了不同方法计算可行域结果的差异,并分析了广域、邻域组合策略的互补作用;以与118节点系统互联的39节点系统为例,分析了联络线功率可行域对子区域调度计划的影响,由此验证了所提方法的有效性。展开更多
This paper discusses the primary causes from the point of synergistic effects to improve power system vulnerability in the power system planning and safety operation. Based on the vulnerability conception in the compl...This paper discusses the primary causes from the point of synergistic effects to improve power system vulnerability in the power system planning and safety operation. Based on the vulnerability conception in the complex network theory the vulnerability of the power system can be evaluated by the minimum load loss rate when considering power supply ability.Consequently according to the synergistic effect theory the critical line of the power system is defined by its influence on failure set vulnerability in N-k contingencies.The cascading failure modes are proposed based on the criterion whether the acceptable load curtailment level is below a preset value.Significant conclusions are revealed by results of IEEE 39 case analysis weak points of power networks and heavy load condition are the main causes of large-scale cascading failures damaging synergistic effects can result in partial failure developed into large-scale cascading failures vulnerable lines of power systems can directly lead the partial failure to deteriorate into a large blackout while less vulnerable lines can cause a large-scale cascading failure.展开更多
文摘借助联络线可用传输容量(available transfer capability,ATC)来评估跨区电网的通道传输能力,可能导致据此得到的联络线计划与子区域的运行条件不匹配或引起额外的再调度成本。提出了一种基于广域和邻域时段组合的联络线功率可行域分析方法,可以更好地适应日前调度的场景需求。首先,借助多面体投影理论分析了时段耦合关系对可行域计算的影响,并提出应对思路。然后,针对日前调度跨时段耦合的特点,设计了广域和邻域时段组合的策略并构造可行域模型,兼顾时段跨度较大的耦合约束以及相邻时段的耦合约束的影响,将广域和邻域时段可行域的计算结果合成得到日前调度各时段的联络线功率可行域。最后,基于118节点系统比对了不同方法计算可行域结果的差异,并分析了广域、邻域组合策略的互补作用;以与118节点系统互联的39节点系统为例,分析了联络线功率可行域对子区域调度计划的影响,由此验证了所提方法的有效性。
基金The National Natural Science Foundation of China(No.51277028)
文摘This paper discusses the primary causes from the point of synergistic effects to improve power system vulnerability in the power system planning and safety operation. Based on the vulnerability conception in the complex network theory the vulnerability of the power system can be evaluated by the minimum load loss rate when considering power supply ability.Consequently according to the synergistic effect theory the critical line of the power system is defined by its influence on failure set vulnerability in N-k contingencies.The cascading failure modes are proposed based on the criterion whether the acceptable load curtailment level is below a preset value.Significant conclusions are revealed by results of IEEE 39 case analysis weak points of power networks and heavy load condition are the main causes of large-scale cascading failures damaging synergistic effects can result in partial failure developed into large-scale cascading failures vulnerable lines of power systems can directly lead the partial failure to deteriorate into a large blackout while less vulnerable lines can cause a large-scale cascading failure.
