基于多变量阻尼比灵敏度的有功调制方法研究

发布时间：2018-01-24 22:46

本文关键词： 小干扰稳定性弱阻尼有功调制多变量阻尼比灵敏度　出处：《电网技术》2017年11期 　论文类型：期刊论文

【摘要】：区域互联电网中存在的弱阻尼模式严重影响电力系统小干扰稳定性。为消除系统潜在弱阻尼模式,提出了一种以运行态势感知与发电机有功调制为基础,以提高系统阻尼比为目标的阻尼调控策略。首先,利用随机子空间辨识算法(stochastic subspace identification,SSI)从系统基础运行数据中提取系统振荡频率与阻尼比等,当系统存在弱阻尼模式时发出预警,进而应用多变量阻尼比灵敏度,筛选参调发电机组,并利用优化算法确定调整量,在线履行发电机有功调节,快速、高效提高系统阻尼,消除弱阻尼模式。最后,利用IEEE 4机2区系统和16机5区系统验证了所提方法的有效性和可行性。
[Abstract]:There is weak damping mode of interconnected power system in serious impact on power system small signal stability. In order to eliminate the potential weak damping mode, presents a situation of perception and active power modulation based damping control strategy to improve the system damping ratio as the goal. Firstly, using stochastic subspace identification algorithm (stochastic subspace identification SSI), extraction system oscillation frequency and damping ratio from the system based on operation data, issued a warning when the weak damping mode system, and the application of multi variable damping ratio sensitivity, selection of reference tone generator, and the optimization algorithm to determine the amount of adjustment, online performance generator active power regulation, fast and efficient to improve system damping. To eliminate the weak damping mode. Finally, using IEEE 4 machine 2 area system and 16 machine 5 area system show that the proposed method is effective and feasible.

【作者单位】：东北电力大学电气工程学院;
【基金】：国家自然科学基金项目(51507028)~~
【分类号】：TM712
【正文快照】： 0引言近年来,随着大容量、高参数火电机组快速发展和特高压工程的建设投产,我国电网进入特大型交直流混联的新时期,系统运行特性愈加复杂[1-2]。由长距离、重负荷输电引起的小干扰稳定问题也更加突出。目前,提高系统中弱阻尼至强阻尼的手段主要有3种:改变电网结构[3]、安装闭

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