基于混合法的潮流可行域边界计算  

COMPUTING THE BOUNDARY OF THE POWER FLOW FEASIBLE REGION BASED ON THE HYBRID METHOD

作　　者：余贻鑫[1] 李鹏[1] 贾宏杰[1] 

机构地区：[1]天津大学电气自动化与能源工程学院,天津市300072

出　　处：《电力系统自动化》2004年第13期18-25,共8页Automation of Electric Power Systems

基　　金：国家重点基础研究专项经费资助项目(G1998020307)

摘　　要：电力系统潮流可行域对于静态电压稳定的研究非常重要,文中给出了一种计算其边界的“混合法”。混合法源自于“预测一校正”的思想,同时它将边界计算问题转化为一个以域外某点到边界面距离最小为目标函数的优化问题。这种转化使得所处理的问题维数与原型的“预测一校正”法相比得到了降低。除了能在二维空间实现可行域边界的可视化,混合法也可用来计算高维空间中与当前运行点相对应的最近边界点,同时可计及系统中设备的限值。针对实际中可能出现的“凹”的边界面拓扑结构,文中还相应提出了一种改进“混合法”来解决该问题。最后通过在两个不同系统上的仿真算例演示了混合法在计算电力系统潮流可行域边界时的灵活适用性及其有效性。This paper presents a new hybrid method for computing the boundary of the power flow feasible region, which is pertinent to static voltage stability analysis. The hybrid method is derived from the 'predictor-corrector' framework and it converts the computation of boundary to an optimal problem, whose objective is to determine the minimum distance from an external point of the feasible region to the boundary. Attributing to this conversion, the dimension of the hybrid method can be reduced compared with the original 'predictor-corrector' method. Except for benefits to visualization of boundary in two dimension space, the method is a powerful too! for computing the closest boundary point related to current operating point in high dimension space, as well as the limit of equipment can be induced. Considering the possibility of concave topology on the boundary, a modification to the hybrid method is also proposed to deal with this issue. Finally, some numerical simulations in two different systems illustrate that the hybrid method is reliable and effective in computation of the boundary of the power flow feasible region.

关 键 词：潮流可行域 电压稳定 预测-校正 优化 鞍节分岔 最近鞍节分岔点 可视化 

分 类 号：TM744[电气工程—电力系统及自动化]