基于感应电动机网荷互馈特性的暂态电压失稳机理探析
发布时间：2018-03-16 18:00
本文选题：电压稳定 切入点：视在功率传输 出处：《电力系统自动化》2017年07期 论文类型：期刊论文
【摘要】：正确认识电压失稳机理是进一步对电力系统电压稳定问题进行深入研究的关键。分析了网络视在功率传输特性和感应电动机负荷特性,揭示了以感应电动机为核心的暂态电压失稳正反馈动态过程。将与滑差相关的感应电动机负荷及网络视在功率传输的相互作用关系定义为感应电动机网荷互馈特性,并据此进一步分析了含有感应电动机负荷的系统电压崩溃过程,明确了基于感应电动机网荷互馈特性的暂态电压失稳机理,提出了感应电动机负荷电压失稳判据,构建了简单系统算例验证分析结果。分析表明,以感应电动机为核心的电压失稳正反馈动态过程是系统暂态电压失稳的重要环节;将感应电动机故障切除时滑差对应的恢复电压作为判断感应电动机电压稳定的必要条件,能够提高暂态电压失稳判定的准确性与适用性。所述电压稳定判据为预防电压失稳现象的发生和制定电压失稳解决措施提供了有力的理论支撑。
[Abstract]:A correct understanding of the mechanism of voltage instability is the key to further study the voltage stability of power system. The characteristics of network apparent power transmission and induction motor load are analyzed. The dynamic process of transient voltage instability positive feedback based on induction motor is revealed. The interaction between load and network apparent power transmission of induction motor related to slip is defined as the characteristics of reciprocal feedback of induction motor network load. Based on this, the system voltage collapse process with induction motor load is further analyzed, and the transient voltage instability mechanism based on the characteristics of induction motor network load mutual feed is clarified, and the load voltage instability criterion of induction motor is proposed. A simple system example is built to verify the analysis results. The analysis shows that the dynamic process of voltage instability positive feedback with induction motor as the core is an important link of transient voltage instability. When the fault of induction motor is removed, the recovery voltage corresponding to slip difference is taken as the necessary condition to judge the voltage stability of induction motor. It can improve the accuracy and applicability of the transient voltage instability determination. The voltage stability criterion provides a powerful theoretical support for preventing the occurrence of the voltage instability phenomenon and formulating the voltage instability resolution measures.
【作者单位】： 南瑞集团公司(国网电力科学研究院)(北京);河海大学能源与电气学院;V锿轿魇〉缌，
本文编号：1621027
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