Journal
IEEE TRANSACTIONS ON SMART GRID
Volume 10, Issue 6, Pages 6678-6689Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSG.2019.2910169
Keywords
Distribution network; reactive power support; voltage regulation; parallel computing; asynchronous distributed optimization
Categories
Funding
- National Nature Science Foundation of China [61803165, 61673303, 61722303, 61673104]
- China Post-Doctoral Science Foundation [2018M630860]
- Australian Research Council [DE180101268, DP170102303]
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Due to high penetration of distributed energy resources, voltage violation has become one of the most critical issues in control of modern power systems with integration of renewable distributed generations (DGs). In this paper, an online distributed approach is proposed to regulate voltage in radial distribution networks via DGs. By fully considering the topological properties of the radial distribution network, the proposed approach successfully decomposes the global voltage regulation problem into a sequence of local reactive power optimization sub-problems with low dimensions. It has been further shown that the optimal solution of the global voltage regulation problem can be achieved by cyclically solving these local subproblems in a branch-wise parallel successive order. Compared with the existing literature, the proposed online distributed voltage regulation approach does not require synchronous updates of all the participants and can improve the performance of the distribution network during the process of its execution. The effectiveness, robustness to fast voltage fluctuations, convergence speed, and insensitivity to parameters of the proposed approach are validated by performing case studies.
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