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(interval optimal power flow,IOPF)。源于区间优化法,将系统的新能源发电出力、节点...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(interval optimal power flow,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。IEEE 14、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。展开更多
The active power loop flow(APLF)may be caused by impropriate network configuration,impropriate parameter settings,and/or stochastic bus powers.The power flow controllers,e.g.,the unified power flow controller(UPFC),ma...The active power loop flow(APLF)may be caused by impropriate network configuration,impropriate parameter settings,and/or stochastic bus powers.The power flow controllers,e.g.,the unified power flow controller(UPFC),may be the reason and the solution to the loop flows.In this paper,the critical existence condition of the APLF is newly integrated into the simultaneous power flow model for the system and UPFC.Compared with the existing method of alternatively solving the simultaneous power flow and sensitivity-based approaching to the critical existing condition,the integrated power flow needs less iterations and calculation time.Besides,with wind power fluctuation,the interval power flow(IPF)is introduced into the integrated power flow,and solved with the affine Krawcyzk iteration to make sure that the range of active power setting of the UPFC not yielding the APLF.Compared with Monte Carlo simulation,the IPF has the similar accuracy but less time.展开更多
文摘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(interval optimal power flow,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。IEEE 14、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。
基金the National Natural Science Foundation of China(Grant No.51877061).
文摘The active power loop flow(APLF)may be caused by impropriate network configuration,impropriate parameter settings,and/or stochastic bus powers.The power flow controllers,e.g.,the unified power flow controller(UPFC),may be the reason and the solution to the loop flows.In this paper,the critical existence condition of the APLF is newly integrated into the simultaneous power flow model for the system and UPFC.Compared with the existing method of alternatively solving the simultaneous power flow and sensitivity-based approaching to the critical existing condition,the integrated power flow needs less iterations and calculation time.Besides,with wind power fluctuation,the interval power flow(IPF)is introduced into the integrated power flow,and solved with the affine Krawcyzk iteration to make sure that the range of active power setting of the UPFC not yielding the APLF.Compared with Monte Carlo simulation,the IPF has the similar accuracy but less time.
