1. Improvement of Control Law Derivation and Region Selection for D-\Sigma Digital Control.
- Author
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Wu, Tsai-Fu, Hsieh, Hui-Chung, Chang, Chih-Hao, Lin, Li-Chiun, and Chang, Yung-Ruei
- Subjects
- *
DIGITAL control systems , *ELECTRIC inverters , *REACTIVE power , *ELECTRIC current rectifiers , *COMPUTER firmware - Abstract
A division–summation (D-\mathbf\Sigma) digital control for three-phase inverters to achieve active and reactive power injection has been presented. It can overcome the limitation of abc to dq frame transformation. However, the D-\mathbf\Sigma control requires four sets of control laws to cover four quadrant operations, namely, grid connection (power factor (PF) 1 $\sim\pm$0.866), rectification with PF correction, PF leading (0 \sim$ 0.866), and PF lagging (0 \sim$ −0.866). Moreover, the switching sequences for the four modes are also different from each other, increasing complexity of firmware programming. In this paper, improvement of the control law derivation and region selection for the (D), which can obtain the control law directly. Measured results from a 10-kVA 3 $\phi$ bidirectional inverter have been presented to confirm the improvement. [ABSTRACT FROM PUBLISHER]
- Published
- 2015
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