Wide-Area Damping Control of Power System Based on a ε-Tradeoff “Damping-Time Delay” Method

doi:10.11930/j.issn.1004-9649.201802038

Electric Power ›› 2018, Vol. 51 ›› Issue (12): 80-87.DOI: 10.11930/j.issn.1004-9649.201802038

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Wide-Area Damping Control of Power System Based on a ε-Tradeoff “Damping-Time Delay” Method

YU Miao^1,2,3, LU Haoyang^1,3

1. School of Mechanical-Electronic and Automobile Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Perth 6845, Australia;
3. Beijing Key Laboratory of Service Performance of Urban Rail Transit Vehicles Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Received:2018-02-08 Revised:2018-08-08 Online:2018-12-05 Published:2018-12-13
Supported by:
This work is supported by National Natural Science Foundation of China (Research on Wide Area Damping Control of Power System under Multi-disturbance Environment Based on Adaptive Iterative Identification, No.51407201); National Foundation for Studying Abroad (No.201709960017); Fundamental Research Funds for Beijing University of Civil Engineering and Architecture (Research on Wide Area Damping Control of Power System with Wind Integration Considering Communication Delay, No.X18121); BUCEA Post Graduate Innovation Project (Study on Signal Optimal Selection and Controller Design of Wide Area Damping Control for Power System, No.PG2018085).

Abstract

Abstract: There exists time delay problem in solving the inter-area low-frequency oscillation of power system, which brings significant influence on the system stability. In order to solve this problem, a reduced-order mathematical model of power system is firstly established. And then a tradeoff-based idea is proposed to achieve wide-area damping control. Based on the linear matrix inequality (LMI) toolbox, the Lyapunov time-delay stability criterion is used to acquire the wide-area damping controller (WADC) parameters. And then the system stability is proved by using an indirect method of time-delay segmentation, and the damping characteristics of the power system is analyzed. Finally, simulations are carried out by using the four-machine two-area model. The simulation results show that the rotor angle and reactive power tend basically stable in about 6 seconds, and the damping stability of power system is improved effectively compared with other conventional WADC methods.

Key words: wide-area damping controller, low frequency oscillation, “damping-time delay” tradeoff, multi-interference system, LMI

CLC Number:

TM743

YU Miao, LU Haoyang. Wide-Area Damping Control of Power System Based on a ε-Tradeoff “Damping-Time Delay” Method[J]. Electric Power, 2018, 51(12): 80-87.

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Wide-Area Damping Control of Power System Based on a ε-Tradeoff “Damping-Time Delay” Method

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