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电网技术  2014 

计及负荷时变性及分布式电源出力波动性的配电网两级实时重构

DOI: 10.13335/j.1000-3673.pst.2014.11.049, PP. 3260-3265

Keywords: 不平衡配电网,两级实时重构,时变性,DG出力波动,最大概率重构,(MPR)

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Abstract:

针对分布式电源(distributedgeneration,DG)接入配电网的特点提出两级实时重构的概念。两级实时重构是指正常运行方式下的最大概率重构(maximumprobabilityreconfiguration,MPR),以及当DG出力或者负荷出现较大波动时,网络拓扑快速响应为实时重构(real-timereconfiguration,RTR)的运行方式。所提两级实时重构模型及方法重点考虑了DG出力和负荷的时变性、负荷的静态电压特性以及配电网的三相不平衡特性。文中比较了4种配电网重构方式的网损和网损率始终维持原始拓扑结构、15min实时重构、两级实时重构以及系统在额定负荷和额定DG出力水平下的最优重构。改进的IEEE16节点和IEEE34节点配电系统的仿真分析表明,所提的两级实时重构方法不仅能有效降低系统网损,同时提高了系统运行的安全性和可靠性。

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