电网技术2017，Vol.41Issue(11)：3612-3619,8.DOI:10.13335/j.1000-3673.pst.2017.0632
基于多变量阻尼比灵敏度的有功调制方法研究
On-Line Active Power Modulation Based on Multi-Variable Damping Ratio Sensitivity
摘要
Abstract
In interconnected regional power grid, weak damping modes pose a great threat to small signal stability. To avoid further deterioration due to insufficient damping, this paper proposes a damping control strategy based on operational situation awareness and active power modulation of generator to improve system damping ratio. Firstly, stochastic subspace identification (SSI) is applied to extract eigen parameters from basic operational measurements, such as oscillation frequency, damping ratio, etc. If there exists a warning of weak damping, multi-variable damping ratio sensitivity is used to select suitable generators and optimization algorithm is adopted to determine amount of power adjustment. Through on-line generators power modulation, damping ratio is enhanced quickly and efficiently. Finally, simulations on IEEE 4-generator 2-area and 16-generator 5-area systems verify feasibility and effectiveness of this method.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Key words
small signal stability/weak damping/active power modulation/multi-variable damping ratio sensitivity分类
信息技术与安全科学引用本文复制引用
杨德友,王文嘉..基于多变量阻尼比灵敏度的有功调制方法研究[J].电网技术,2017,41(11):3612-3619,8.基金项目
国家自然科学基金项目(51507028). Project Supported by National Natural Science Foundation of China (NSFC) (51507028). （51507028）
