Distributed Online Voltage Control in Distribution Network
A Two-Stage Real-Time Implementation
Zhengfa Zhang (The University of Tennessee)
Filipe Faria da Silva (Aalborg University)
Yifei Guo (University of Aberdeen)
Yufei Xi (Tsinghua University)
Claus Leth Bak (Aalborg University)
Jose Rueda Torres (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Jin Dong (Oak Ridge National Laboratory)
Zhe Chen (Aalborg University)
Yilu Liu (The University of Tennessee)
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Abstract
The increasing integration of renewable-based distributed generation (DG) brings growing challenges to distribution network (DN) voltage control. To address this issue, a two-stage distributed online voltage control framework (TDO-VC) is proposed in this paper. In the proposed method, legacy voltage control devices are controlled in the upper stage on an hourly timescale, while DGs operate autonomously online in the lower stage to remove instantaneous voltage violations. The idea of receding horizon control is applied in the upper stage to comprehensively consider the current and future renewable generation, and the generalized fast dual ascent (Gf-DA) is employed in the lower stage to effectively manage DGs through near real-time optimization. The effectiveness of the proposed TDO-VC is demonstrated by rigorous theoretical analysis and case studies on IEEE-123 bus system.
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