Distributed Online Voltage Control with Fast PV Power Fluctuations and Imperfect Communication

Coordinated Volt-Var control methods have demonstrated their techno-economic feasibility in voltage regulation of photovoltaic (PV) rich distribution systems. However, fast fluctuating PV power and imperfect communication networks may significantly challenge the effectiveness of these methods. In th...

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Bibliographic Details
Published in:IEEE transactions on smart grid 2023-09, Vol.14 (5), p.1-1
Main Authors: Wang, Licheng, Xie, Luochen, Yang, Yu, Zhang, Youbing, Wang, Kai, Cheng, Shi-jie
Format: Article
Language:English
Subjects:
Algorithms
Communication
Communication networks
consensus
Consensus algorithm
Control methods
Convergence
distribution systems
Error analysis
Heuristic algorithms
imperfect communication
Inverters
photovoltaic (PV)
Photovoltaic cells
Reactive power
Real-time systems
Time lag
Tracking errors
Voltage control
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Summary:Coordinated Volt-Var control methods have demonstrated their techno-economic feasibility in voltage regulation of photovoltaic (PV) rich distribution systems. However, fast fluctuating PV power and imperfect communication networks may significantly challenge the effectiveness of these methods. In this paper, a revised dynamic consensus algorithm is proposed to coordinate distributed inverters for Volt-Var control in real time. With this proposed method, Var saturation and overvoltage issues which tend to occur at downstream buses of PV rich distribution systems are significantly mitigated. To quantitatively analyse the algorithm performance in imperfect communication environments, the information delivery between agents is modelled by stochastic state transition processes among finite numbers of virtual nodes so as to quantitatively depict the random time delay and packet dropout in a discrete way. On this basis, the state transition process of the whole system is further depicted by a series of row-stochastic matrices, and the ergodic theory is used to analytically derive the algorithm tracking error in an imperfect communication environment. Our proposed method can also be extended to more complex applications, where both Var compensation and PV curtailment (or EV dispatch) are available for system voltage control. Simulation results verify the superiority of our method over traditional ones.
ISSN:1949-3053
1949-3061
DOI:10.1109/TSG.2023.3236724