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.
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
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
AC/DC power system
simultaneous fault
saddle node bifurcation
load margin
nonlinear sensitivity
