建立了无功源正向有效无功储备求解模型,并提出了一种能获得各动态无功源正向无功储备的改进自适应粒子群算法,把动态改变惩罚系数的惩罚函数与自适应粒子群算法相结合,有效克服粒子群算法的早熟问题。不同于以往整个电力系统负荷增长...建立了无功源正向有效无功储备求解模型,并提出了一种能获得各动态无功源正向无功储备的改进自适应粒子群算法,把动态改变惩罚系数的惩罚函数与自适应粒子群算法相结合,有效克服粒子群算法的早熟问题。不同于以往整个电力系统负荷增长因子λ统一的单一变化模式,求解模型中每个负荷节点负荷因子λ各自独立变化,由此求取各无功源正向有效无功储备更符合系统运行实际情况。利用New England 39节点系统进行了5种典型运行方式下的计算分析,分析结果对于保证电力系统安全、经济运行有一定的指导意义。展开更多
A parameter that allows an evaluation of power quality transmitted, or distributed, between energy source and the final user is electric system power factor. Among other aspects, a bigger power factor, close to unit v...A parameter that allows an evaluation of power quality transmitted, or distributed, between energy source and the final user is electric system power factor. Among other aspects, a bigger power factor, close to unit value, relieves operational conditions of lines and cables, besides, it improves feeder＇s voltage behavior. Due to load variation along the day, the dynamic compensation of power factor allows maintaining this parameter close to the ideal. This paper brings a study about a reactive dynamic compensator based on the voltage control in a capacitive element, varying the reactive energy in accordance with the system demand, everything from the energy efficiency point of view. In distribution systems, the losses due to this variable compensation can be lower than in other compensation methods and also the voltage presents a better behavior, justifying its application.展开更多
文摘建立了无功源正向有效无功储备求解模型,并提出了一种能获得各动态无功源正向无功储备的改进自适应粒子群算法,把动态改变惩罚系数的惩罚函数与自适应粒子群算法相结合,有效克服粒子群算法的早熟问题。不同于以往整个电力系统负荷增长因子λ统一的单一变化模式,求解模型中每个负荷节点负荷因子λ各自独立变化,由此求取各无功源正向有效无功储备更符合系统运行实际情况。利用New England 39节点系统进行了5种典型运行方式下的计算分析,分析结果对于保证电力系统安全、经济运行有一定的指导意义。
文摘A parameter that allows an evaluation of power quality transmitted, or distributed, between energy source and the final user is electric system power factor. Among other aspects, a bigger power factor, close to unit value, relieves operational conditions of lines and cables, besides, it improves feeder＇s voltage behavior. Due to load variation along the day, the dynamic compensation of power factor allows maintaining this parameter close to the ideal. This paper brings a study about a reactive dynamic compensator based on the voltage control in a capacitive element, varying the reactive energy in accordance with the system demand, everything from the energy efficiency point of view. In distribution systems, the losses due to this variable compensation can be lower than in other compensation methods and also the voltage presents a better behavior, justifying its application.
