Multi-criterion integrated method for low-frequency oscillation-type identification

The Journal of Engineering

Xialing Xu¹  Ming Sun²  Lei Chen³ 

[1] Power Dispatching and Control Sub-center , Central China Branch of State Grid Corporation of China , Wuhan , People'State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering , Tsinghua University , Beijing , People's Republic of China

关键词: control decision system;    power system security;    forced oscillation;    characteristic index;    single-criterion method;    natural oscillation;    startup-stage intrinsic damping ratio;    real-power grid simulation;    low-frequency oscillation-type identification;    multicriterion integrated method;    harmonic content;    oscillation waveform;    defense system;    noise response damping ratio;   

DOI  :  10.1049/joe.2018.8353

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Low-frequency oscillation is one of the major threats to power system security. Online analysis and control decision system for low-frequency oscillation is in urgent need. Natural oscillation and forced oscillation are two types of low-frequency oscillation. Different oscillation types need different treatment measures. Thus oscillation-type identification is an important part of the defense system. A new multi-criteria integrated method for identifying low-frequency oscillation type is proposed. It has multiple criteria and overcomes the shortcomings of the previous single-criterion method which has low accuracy. It chooses harmonic content, characteristic index of starting oscillation waveform, and the startup-stage intrinsic damping ratio together with noise response damping ratio as criteria. The flowchart of the method is provided. The effectiveness of the multi-criteria integrated method is verified by real-power grid simulation cases. The results show that the method can reliably distinguish the low-frequency oscillation type and is practical in the real-power system.

【 授权许可】

CC BY