电力系统电压稳定的研究

【作者】 王新宝；

【导师】 韩祯祥；

【作者基本信息】 浙江大学 ， 电力系统及其自动化， 2004， 硕士

【摘要】 电压失稳是近代电力系统研究的重要课题之一，其研究大大丰富了电力系统稳定的内涵。本文在总结前人研究工作的基础上，对电力系统静态电压稳定做了较为深入的研究，主要包括对负荷模型的研究和故障筛选算法的研究。 采用了ZIP负荷模型来计算系统的PV曲线，并与采用恒功率负荷模型时的结果进行了比较，得出了一些有实际意义的结论。 采用变导纳法，将感应电动机的静态等值参数直接运用于电力系统PV曲线的计算。该法能够准确地描述感应电动机的静态特性，并易于实现。同时分析了感应电动机失稳对PV曲线和静态电压稳定的影响，并研究了电压稳定临界点选择的方法。 论述了几种主要故障选择和筛选的算法，在此基础上进行了改进，提出了一种新的算法。更多还原

【Abstract】 Voltage instability or collapse has been the subject of recent investigations, which extends the concepts of power system stability. Based on the summarization of previous work, this dissertation conducts systematical research work on static voltage stability, such as load modeling and contingency screening and ranking.ZIP load model is used to calculate the PV curves of the power system, and some meaningful conclusions are drawn by comparing its result with which constant power load model is used.Varying-admittance method is used to calculate the PV curves of the power system, and only parameters of static equivalent circuit is needed in the calculation. This method can be implemented easily and the static characteristic of induction motor can be calculated precisely. The paper also investigates the influence of stalling of induction motor to PV curves and voltage static stability, and studies the method for selecting the critical point.Some contingency screening and ranking algorithms for voltage security analysis are reviewed. Based on that, a new method is proposed.更多还原