电力系统注入空间静态电压稳定域边界的实用表达式  

A PRACTICAL BOUNDARY EXPRESSION OF STATIC VOLTAGE STABILITY REGION IN INJECTION SPACE OF POWER SYSTEMS

作　　者：韩琪 [1] 余贻鑫 [1] 李慧玲 [1] 贾宏杰 [1] 李鹏 [1] Stephen T.Lee  ZHANG Pei  

机构地区：[1]天津大学电气与自动化工程学院,天津市,南开区,300072 [2]EPRI U.S.,Palo Alto,CA,USA 94303

出　　处：《中国电机工程学报》2005年第5期8-14,共7页Proceedings of the CSEE

基　　金：自然科学基金重大项目(50595413);国家重点基础研究规划(973)项目(2004CB217904);美国电力科学研究院合作科研基金(EPRI EP-P11543/C5729)。~~

摘　　要：电力系统注入空间上的静态电压稳定域(SVSR)是近有效的电压安全监控手段,对其边界的准确表达和快速求取是 SVSR 实用化的重要保证。该文推导了单机单负荷系统 SVSR 边界的解析表达式,在其启发下,通过将系统静态电压稳定临界条件做 Taylor 级数展开,给出了一种注入空间中 SVSR 边界的二次近似解析表达形式;基于模态分析,提出了选择系统关键节点的方法,以实现注入空间的有效降维。最后,通过 IEEE 14 节点、57 节点系统和EPRI 1000 节点测试系统的算例对文中方法的有效性进行了验证,结果表明:当发电与负荷大范围变动时,在不同运行条件下估计注入空间 SVSR 边界的误差均在 3%以下。Static voltage stability region (SVSR) in power injection space is a promising framework for voltage security assessment and control. An accurate expression of the SVSR boundary and the fast determination of coefficients of the expression are important issues for its application in bulk power systems. In this paper, we derive the analytical expression of SVSR boundary in a single-generator-single-load system, which brings new insight into characteristics of SVSR boundary’s expression. By using Taylor series expansion of the critical condition of static voltage stability, a quadratic analytical formulation is then proposed as the approximation of SVSR boundary in injection space. Furthermore, we also provide a method for critical nodes selection based on modal analysis, which aims at reducing the huge dimension of injection space. The effectiveness of the proposed method is demonstrated through IEEE 14-bus, 57-bus systems and EPRI 1000-bus system. The estimation errors of the proposed boundary description in injection space are not more than 3% for various operating conditions when generators and loads change over a wide range.

关 键 词：电压稳定 电力系统 EPRI 发电 实用化 单机 负荷 定域 边界 表达式 

分 类 号：TM712[电气工程—电力系统及自动化] O436.1[机械工程—光学工程]