Abstract
A new direct power control (DPC) approach for a voltage source inverter (VSI) based three-phase grid-connected solar photovoltaic (PV) system is proposed in this paper. The proposed DPC is designed using the nonlinear backstepping control scheme based on the power dynamics rather than the conventional dp current dynamics. As a result, the inner current control loop is eradicated in this paper which simplifies the system modeling and controller design and enhances the transient performance. Conversely, the outer voltage loop is used to generate the active power reference from the closed loop control of the dc-link voltage dynamics. The proposed controller is designed recursively based on the Lyapunov function theory and overall stability of the whole system is confirmed with the formulation of control Lyapunov functions (CLFs) at every design stage of the controller. Finally, the performance of the designed controller is tested on a three-VSI based three-phase grid-connected PV system under different operating conditions. The performance is also compared with an existing controller and it is clear that designed controller can better performance than the existing controller in terms of the total harmonic distortion (THD) of the injected current and quality of power.
Original language | English |
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Title of host publication | Proceedings of 9th International Conference on Electrical and Computer Engineering, ICECE 2016 |
Place of Publication | Piscataway, NJ |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Pages | 407-410 |
Number of pages | 4 |
ISBN (Electronic) | 9781509029631, 97-1509029624 |
ISBN (Print) | 9781509029648 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |
Event | 9th International Conference on Electrical and Computer Engineering, ICECE 2016 - Dhaka, Bangladesh Duration: 20 Dec 2016 → 22 Dec 2016 |
Conference
Conference | 9th International Conference on Electrical and Computer Engineering, ICECE 2016 |
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Country/Territory | Bangladesh |
City | Dhaka |
Period | 20/12/16 → 22/12/16 |
Keywords
- Active power
- backstepping controller
- direct power control
- Control Lyapunov function
- power quality
- reactive power
- total harmonic distortion