基于附加虚拟阻抗和蚁群优化算法的动态等效模型在线修正方法  

An Online Adjustment Method of Dynamic Equivalent Model Based on Additional Fictitious Impedances and Ant Colony Optimization Algorithm

作　　者：周海强[1] 鞠平[1] 宋忠鹏[1] 金宇清[1] 孙国强[1] 

机构地区：[1]河海大学电气工程学院,江苏省南京市210098

出　　处：《中国电机工程学报》2011年第19期75-81,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50977021);国家杰出青年科学基金(50725723)~~

摘　　要：提出基于虚拟阻抗的动态等效模型在线修正方法。首先,指出等值过程中不合理的聚类算法、对时变系统的定常化假设是误差主要来源。接着,提出通过等效模型的在线修正以克服系统时变性所导致的误差。由于等效模型可调参数过多,难以对所有参数进行调整。为此,在等效发电机、等效电动机节点引入附加虚拟阻抗,应用蚁群优化算法进行调节,以实现边界点最佳功率匹配,并利用广域测量系统(widearea measurement system,WAMS)提供的实测数据对动态等效模型进行定时修正。最后,IEEE 10机39母线系统的等值计算结果表明:算法较好地改进了动态等效模型的静态精度与暂态精度,提高了模型的强壮性。A novel method of online adjustment of dynamic equivalent model was proposed in this paper. Firstly, it was pointed out that the unreasonable aggregation algorithm and constant hypothesis of the time-varying system were main sources of equivalent error. Then, online adjustment was put forward to overcome the error caused by the time-varying characteristics of the system. Parameters in the equivalent model were too many to adjust directly. And the additional fictitious impedances were introduced to overcome this difficulty. These impedances were connected to equivalent generator and equivalent motor buses. Injecting power match at boundary nodes has been achieved by adjustment of fictitious impedances with ant colony optimization （ACO） algorithm. Online adjustment can be further realized when the dynamic equivalent model is modified timely according to real time information provided by the wide area measurement system （WAMS）. Finally, simulation results of the IEEE 10-generator and 39-bus test system showed that both the static and transient precisions can be enhanced largely with this method, and the robustness of the equivalent model can also be improved.

关 键 词：动态等效模型 虚拟阻抗 蚁群优化算法 在线修正 广域测量系统 

分 类 号：TM74[电气工程—电力系统及自动化]