电力系统自动化2017，Vol.41Issue(7)：8-14,7.
基于感应电动机网荷互馈特性的暂态电压失稳机理探析
Mechanism Analysis for Transient Voltage Instability Based on Crossfeed Characteristics Between Power Network and Load of Induction Motor
张文朝 1张博 2潘捷 3孟涛 3赵红光 1周玲2
作者信息
- 1. 南瑞集团公司(国网电力科学研究院)(北京),北京市 102200
- 2. 河海大学能源与电气学院,江苏省南京市 211100
- 3. 囯网山西省电力公司,山西省太原市 030001
- 折叠
摘要
Abstract
To correctly reveal how voltage instability works is the key to in-depth study of power system voltage stability.The characteristics of network apparent power transmission and induction motor load are analyzed,and the transient voltage instability positive feedback dynamic process centering on the induction motor is discussed.The relationship between the induction motor load and apparent power transmission of network is defined as crossfeed characteristics between power network and the load of induction motor.Accordingly,the process of voltage collapse with the induction motor load is further accounted for.In addition,the transient voltage instability process based on the crossfeed characteristics is further clarified,and an induction motor load voltage instability criterion is proposed.A simple system model is built to verify the result.The analysis shows that the positive feedback dynamic process centering on the induction motor is an important step for the system transient voltage instability.When clearing the fault with the induction motor,the slip's corresponding restored voltage is used as a necessary condition for induction motor voltage stability judgment,improving the accuracy and applicability.A powerful theoretical support is offered by the proposed voltage stability criterion to prevent voltage instability and put forward related countermeasures.关键词
电压稳定/视在功率传输/感应电动机/负荷特性/失稳判据Key words
voltage stability/apparent power transmission/induction motor/load characteristic/instability criterion引用本文复制引用
张文朝,张博,潘捷,孟涛,赵红光,周玲..基于感应电动机网荷互馈特性的暂态电压失稳机理探析[J].电力系统自动化,2017,41(7):8-14,7.
