实际系统次同步谐振建模的电网边界识别方法  

Method of Identification of SSR Modeling Boundaries in Real Electrical Networks

作　　者：陈武晖[1] 王龙[1] 宿端鹏 王丹辉[1] 汪妮[1] 孙欣[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏省镇江市212013

出　　处：《中国电机工程学报》2016年第18期4894-4903,5113,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51277089)~~

摘　　要：该文分析了研究机组驱动点阻抗的自然谐振频率和该频率的驱动点电阻对次同步扭振模态电气负阻尼的影响,提出这2个参数是主导次同步扭振模态电气负阻尼的关键参数,定义了这2个参数关于电网元件阻抗参数的灵敏度指标。在这2个灵敏指标的基础上,提出一种识别实际系统次同步谐振"研究区域"边界节点的定量方法。最后,文中应用新英格兰的10台机39节点和IEEE FBM次同步谐振计算标准模型改编了一个算例,应用该仿真算例从频域和时域分别验证了上述建模方法的有效性。This paper investigated the impact of the natural resonant frequency and the corresponding resistance of the driving-point impedances on the electrical negative damping of subsynchronous torsional modes. It was proposed that the two parameters were the two critical parameters for the electrical negative damping of subsynchronous torsional modes. Thus, the sensitivity indexes of natural resonant frequency and the corresponding resistance on parameters of electrical elements were defined. On the base of the two sensitivity indexes, the quantitative method was developed to identify the study zone border buses for SSR modeling. Finally, the IEEE New England 10-machine 39-bus system modified by using IEEE FBM for SSR computation was used to validate the proposed method. The simulation results by the Prony method and PSCAD/EMTDC justify the proposed method for SSR modeling in time and frequency domains.

关 键 词：次同步谐振 次同步谐振建模 频率决定特性 研究区域边界节点 

分 类 号：TM71[电气工程—电力系统及自动化]