Mathematical Expectation Modeling of Wide-Area Controlled Power Systems With Stochastic Time Delay

Author

Chao Lu ; Xinran Zhang ; Xiaoyu Wang ; Yingduo Han

Author_Institution

State Key Lab. of Control & Simulation of Power Syst. & Generation Equip., Tsinghua Univ., Beijing, China

Volume

6

Issue

3

fYear

2015

fDate

May-15

Firstpage

1511

Lastpage

1519

Abstract

Communication network brings new challenges such as time delay and data loss to wide-area damping control of power systems. The uncertainty caused by stochastic time delay of network communication increases the difficulty of wide-area control performance analysis. This paper proposes a mathematical expectation modeling approach to model and analyze wide-area controlled power systems considering the effect of stochastic time delay. In the proposed method, mathematical expectation of stochastic time delay distribution is derived to accurately model the impact of communication network on wide-area control performance. The theoretical frame of the proposed modeling approach is presented, and the effectiveness of the method is verified through the simulation of a power system with eight generators and 36 nodes.

Keywords

delays; expectation-maximisation algorithm; power system control; power system measurement; stochastic processes; stochastic time delay distribution; wide area damping controlled power system mathematical expectation modeling; Analytical models; Control systems; Delay effects; Mathematical model; Power system stability; Probability; Stochastic processes; Communication network; mathematical expectation modeling; stochastic time delay; wide area damping control; wide area damping control.;

fLanguage

English

Journal_Title

Smart Grid, IEEE Transactions on

Publisher

ieee

ISSN

1949-3053

Type

jour

DOI

10.1109/TSG.2014.2376527

Filename

7008569