A Study on Stability Control of Grid Connected DC Distribution System Based on Second Order Generalized Integrator-Frequency Locked Loop (SOGI-FLL)
Abstract
:1. Introduction
2. 3-Phase AC/DC PWM Converter Used in DC Distribution System
2.1. 3-Phase AC/DC PWM Converter [12,13,14]
2.2. Positive Sequence Voltage and Phase Detector [15,16]
3. Proposed Control Scheme of 3-Phase AC/DC PWM Converter Using SOGI-FLL
3.1. Second Order Generalized Integrator
3.2. SOGI-FLL
3.3. Positive Sequence Voltage Extraction and Phase Detection Using 3-Phase SOGI-FLL
3.4. Control Block Diagram of Overall System with SOGI-FLL
4. Simulation Results
5. Experiment Results
6. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Parameter | Value | Unit |
---|---|---|
Rated power of system | 50 | [kW] |
3 phase line-to-line grid voltage | 380 | [Vrms] |
Grid frequency | 60 | [Hz] |
Switching frequency | 5 | [kHz] |
Output DC-link voltage | 700 | [Vdc] |
DC-link capacitance | 10200 | [] |
LCL filter inductance at grid side | 120 | [] |
LCL filter capacitance | 50 | [] |
LCL filter inductance at converter side | 500 | [] |
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Kang, J.-W.; Shin, K.-W.; Lee, H.; Kang, K.-M.; Kim, J.; Won, C.-Y. A Study on Stability Control of Grid Connected DC Distribution System Based on Second Order Generalized Integrator-Frequency Locked Loop (SOGI-FLL). Appl. Sci. 2018, 8, 1387. https://doi.org/10.3390/app8081387
Kang J-W, Shin K-W, Lee H, Kang K-M, Kim J, Won C-Y. A Study on Stability Control of Grid Connected DC Distribution System Based on Second Order Generalized Integrator-Frequency Locked Loop (SOGI-FLL). Applied Sciences. 2018; 8(8):1387. https://doi.org/10.3390/app8081387
Chicago/Turabian StyleKang, Jin-Wook, Ki-Woong Shin, Hoon Lee, Kyung-Min Kang, Jintae Kim, and Chung-Yuen Won. 2018. "A Study on Stability Control of Grid Connected DC Distribution System Based on Second Order Generalized Integrator-Frequency Locked Loop (SOGI-FLL)" Applied Sciences 8, no. 8: 1387. https://doi.org/10.3390/app8081387