基于引入虚拟负荷的发电机暂态稳定预测  

The Generator Transient Stability Prediction Based on Additional Virtual Loads

作　　者：李琰[1] 周孝信[1] 周京阳[1] 

机构地区：[1]中国电力科学研究院,北京10085

出　　处：《电工技术学报》2008年第3期103-107,130,共6页Transactions of China Electrotechnical Society

摘　　要：提出了基于引入虚拟负荷的发电机暂态稳定预测方法,当系统受到扰动时,将系统降阶化简成仅仅含有发电机机端相量测量单元(PMU)测点的系统,在每个保留节点引入简化的虚拟负荷模型,来反映系统降阶过程中除保留节点外其他各个元件模型参数改变和网络拓扑变化对降阶后网络的影响,并利用毫秒级PMU量测来对各个虚拟负荷模型的参数进行辨识修正,然后再与相应的发电机方程联合,实现系统受扰轨迹预测。通过6机25节点和10机39节点系统对该算法的验证,表明了该算法的有效性。The method for generator transient stability prediction based on virtual loads is proposed in this paper. The power system would be reduced order reserved nodes of power plants with phasor measurement units（PMU）. By introducing an additional virtual load for each reserved nodes, the variety of system elements＇ model and their parameters or alteration of the network topology could he identified by the additional virtual load model for each reserved nodes. The parameter of additional virtual load model would be identified and modified based on PMU data. With related generator equation, the perturbed trajectories prediction should be realized. The effectiveness of the proposed algorithm is verified with numerical simulation on 6-machine 25-bus and 10-machine 39-bus power system.

关 键 词：相量测量单元 虚拟负荷模型 参数辨识与修正 轨迹预测 

分 类 号：TM712[电气工程—电力系统及自动化]