摘要
在多机系统中严格的能量型李雅普诺夫函数是不存在的。不管是认为全部暂态能量还是认为某特定的子集应该对暂态稳定负责,都有物理概念上的漏洞。本文是题为《不可积项和临界能量—关于暂态能量函数的几个注释》一文的续篇。本文进一步澄清了一些观点,并且指出一般认为是强假设的EEAC法的PCOA两机等值实际上与所谓的动能校正是一致的,并可从后者的假设条件中推演出来。不断提高各种直接法的精度是重要的研究方向,但是要求一个启发式的方法在任何情况下都保持高精度是不现实的。本文介绍一种已获成功的新思路,即把大误差的算例检测出来。下一步将是对检测出的算例进行误差修正。
It is impossible to have a rigorous energy type Lyapunov function of multi-machine systems. Whether the total system energy is corrected by taking out a subset of the energy or not corrected at all, the corresponding energy function is not physically sound enough. In this companion to a previous paper, many facts are further clarified, e.g. the critical energy point, the critical energy trajectory and their approximation and the two-cluster separation mode. If one accepts the kinetic energy correction, there is no reason to refuse the PCOA equivalence suggested by EEAC. All direct methods, being of heuristic nature, will have the robustness problems; it is a new way of making direct methods practical to develop criteria of error detection and approaches of error correction.
出处
《电力系统自动化》
EI
CSCD
北大核心
1991年第6期9-18,共10页
Automation of Electric Power Systems
