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考虑新能源的交直流系统区间最优潮流

DOI: 10.13334/j.0258-8013.pcsee.2015.16.002, PP. 4006-4014

Keywords: 交直流系统,区间最优潮流,新能源发电,区间潮流,区间优化法,现代内点法

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Abstract:

为描述新能源发电等电力系统运行参数的不确定性对系统的影响,掌握系统的区间潮流分布,提出一种适于求解含新能源的交直流混联电力系统区间最优潮流(intervaloptimalpowerflow,IOPF)。源于区间优化法,将系统的新能源发电出力、节点负荷功率等不确定量表达为区间变量,引入到交直流混合系统最优潮流计算的非线性规划模型中,建立了区间最优潮流计算的非线性区间优化模型。根据区间匹配和区间极值取值等原理,将该区间规划转化为两个确定性的非线性优化问题,并采用现代内点算法求解,得到了区间最优潮流待求变量的边界信息。IEEE14、118和300节点标准系统的计算结果表明,与蒙特卡罗模拟结果对比,所提出方法具有较高的求解精度,对IOPF目标函数区间半径和区间均值的计算误差不超过9%和0.8%,且易于实现、计算效率高,具有广泛的应用前景。

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