Journal
IEEE TRANSACTIONS ON SMART GRID
Volume 9, Issue 6, Pages 5494-5502Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSG.2017.2680436
Keywords
Hyperplane expression; reactive power control; static voltage security region; voltage control; voltage magnitude constraint
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Funding
- National High-Tech Research and Development Program of China [2015AA050403]
- Field Strategy Research Project of Chinese Academy of Engineering [2016ZCQ06]
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The high penetration levels of distributed generators (DGs), on the one hand, make the operational state of distribution grids increasingly complex; on the other hand, they enrich voltage regulation measures. Consequently, a voltage control strategy of the distribution grid for coordinating DGs and other voltage regulation devices is needed. This paper applies the security region methodology to coordinated voltage control. To meet the demand of online voltage security assessment and control in the distribution grids, a hyperplane expression fir the boundary of the static voltage security region (SVSR) in complex power injection spaces is derived, and a corresponding fast generation method is proposed. Additionally, based on SVSR, a two-stage voltage control strategy is proposed. In the first stage, the regulation devices are automatically selected according to the coefficients in the hyperplane expressions, and the regulation effect can be estimated by SVSR. In the second stage, the outputs of the devices are determined by utilizing an optimization technique. The proposed voltage control strategy is tested by using a modified PG&E69-bus distribution grid, and the results verify the effectiveness.
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