交直流系统的快速复故障过滤算法  

Algorithm of Fast Simultaneous Fault Filter for AC/DC Power System

作　　者：叶晓峻[1] 李华强[1] 赵周芳[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《四川电力技术》2010年第1期16-19,共4页Sichuan Electric Power Technology

基　　金：教育部留学回国人员科研启动基金

摘　　要：高压直流输电的出现给电压稳定研究带来了新的挑战,其中在线电压稳定分析是一项具有挑战性而又不可避免的工作。提出了系统发生鞍结分岔情况下,以负荷裕度为排序依据的快速复故障过滤算法。在典型的直流控制方式下,通过线性灵敏度法获得复故障时负荷裕度和电压的线性评估值。然后通过考虑潮流方程的非线性提出了非线性灵敏度算法,并利用快速线搜索技术,对线性评估值加以改进。通过对IEEE 57节点系统的仿真分析,验证了该方法的有效性和可行性。The emergence of high -voltage DC （HVDC） transmission bnngs new developing prospects lor the stucty ot voltage stability, and the online voltage stability assessment is one of the most important research fields. Based on the conditions of saddle node bifurcations, a fast simultaneous fault filter algorithm is presented so as to calculate the load margin. Upon the condition of a typical DC control mode, the linear estimation values of the load margin and the voltage at the time of simultane- ous fault is obtained by linear sensitivity method. Then, a nonlinear sensitivity method is proposed considering the nonlinearity of the power flow equations. By making use of the fast linear search technology, the linear estimation values are improved sig- nificantly. The accuracy and validity of the proposed method is verified by testing the IEEE 57 - bus systems.

关 键 词：交直流系统 复故障 鞍结分岔 负荷裕度 非线性灵敏度 

分 类 号：TM744[电气工程—电力系统及自动化]