State feedback control aware stochastic transmitting latency in cyber-physical power system

被引:0
作者
Ji, Hao [1 ,2 ]
Wang, Meng [1 ]
Yang, Ting [1 ]
Zhao, Junjie [1 ]
机构
[1] Tianjin Univ, Minist Educ, Key Lab Smart Grid, Tianjin 300072, Peoples R China
[2] State Grid Tianjin Elect Power Co, Tianjin, Peoples R China
来源
INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS | 2018年 / 14卷 / 09期
基金
中国国家自然科学基金;
关键词
Distributed sensor networks; cyber-physical power system; network control theory; transmitting latency; distributed generation micro-grid system; DELAY;
D O I
10.1177/1550147718802260
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Distributed sensor networks with a great number of sensors realize information gathering, transmitting, and controlling, which will greatly improve the reliability and efficiency of industrial infrastructure systems, such as cyber-physical power system. Cyber-physical power system is one of the heuristic systems tightly coupled by a continuous-time electrical power system and a discrete-time information system. The transmitting latency, packets disorder, or loss will fail system convergence, even unstable under disturbance. This article studies the effect of long latency on cyber-physical power system frequency stability based on network control theory and establishes a heuristic model to express the continuous-time distributed generation system and the discrete-time distributed sensor network. A new state feedback controller is designed based on the stochastic optimal control theory to solve the micro-grid's frequency stability problem with stochastic latency disturbance. Finally, we have conducted an extensive evaluation study using a real distributed generation micro-grid system. The simulation results show that the new controller reduces the influence of distributed sensor networks transmitting latency on the frequency stability, and the frequency dynamic process in the distributed generation micro-grid has smaller overshoot and obtains faster dynamic response speed.
引用
收藏
页数:9
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