摘要
电压稳定的机理非常复杂,目前还没有一个完全统一的解释。文章从负荷电压与其等值阻抗和吸收功率的关系出发,提出了一种新的电压稳定分析方法。定义了单位阻抗功率的新概念,推导了电压幅值随其等值阻抗和单位阻抗功率变化而变化的基本方程式。基于该方程式,可以清楚明确地解释暂态过程中电压幅值变化的根本原因,从而为电压稳定的机理解释提供了一条有效的途径。以简单系统仿真为例,证明了所提出方法的有效性。
Due to the complexity of the mechanism of power system voltage stability, thus up to now there is still not a complete and unified explanation for it. Starting from the relation among load voltage magnitude, its dynamic equivalent impedance and absorbed power, the authors propose a new approach to analyze voltage stability. A new conception of power per unit impedance is defined and the basic equation to express the variation of load voltage magnitude with the variation of its dynamic equivalent impedance and that of power per unit impedance is derived. Based on this equation, the substantial reason of load voltage magnitude variation during transient process can be explained clearly and definitely, thereby an effective way for the explanation of voltage stability mechanism is provided. Taking a simple power system for example, the effectiveness of the proposed approach is validated by numerical simulation results.
出处
《电网技术》
EI
CSCD
北大核心
2008年第15期27-30,46,共5页
Power System Technology
基金
国家自然科学基金资助项目(50577073)。~~
关键词
电压稳定
单位阻抗功率
电压幅值变化
基本方程式
电力系统
voltage stability
power per unit impedance
voltage magnitude variation
basic equation
power system
