Detailed Analysis of Grid Connected and Islanded Operation Modes based on P/U and Q/f Droop Characteristics

Qusay Salem

Abstract


This paper presents a thorough control structure of the distributed generators inside the microgrid during both grid-connected and islanded operation modes. These control structures of the DGs voltage source inverters are implemented in synchronous reference frame (SRF) and controlled using linear PI controllers. By implementing the control structures, the microgrid generating units can actively transfer desired real and reactive power to the local loads and the utility load. A modified droop control technique is introduced to facilitate the microgrid performance during both modes of operation. This droop control technique can be performed for active and reactive power sharing of the load demand between the utility grid and the microgrid during islanded mode. The system performance during intentional islanding event and utility load increase is investigated. The simulation results are carried out to confirm the effectiveness of the proposed control strategies during both modes of operation.

References


C.-S. Karavas, G. Kyriakarakos, K. Arvanitis and G. Papadakis, “A multi-agent decentralized energy management system based on distributed intelligence for the design and control of autonomous polygeneration microgrids,” Energy Conversion and Management , vol. 103, pp. 166-179, 2015.

G. Kyriakarakos, A. Dounis, S. Rozakis, K. Arvanitis and G. Papadakis, “Polygeneration microgrids: A viable solution in remote areas for supplying power, potable water and hydrogen as transportation fuel,” Applied Energy , vol. 88, pp. 4517-4526, 2011.

C. Dou, Z. Zhang, D. Yue and H. Gao, “An Improved Droop Control Strategy Based on Changeable Reference in Low-Voltage Microgrids,” Energies , vol. 10, pp. 1-18, 2017.

X. Wang, F. Blaabjerg and Z. Chen, “Autonomous Control of Inverter-Interfaced Distributed Generation Units for Harmonic Current Filtering and Resonance Damping in an Islanded Microgrid,” IEEE Transactions on Industry Applications, vol. 50, no. 1, pp. 452 - 461, 2014.

M. S. Golsorkhi and D. D. C. Lu, “A Control Method for Inverter-Based Islanded Microgrids Based on V-I Droop Characteristics,” IEEE Transactions on Power Delivery, vol. 30, no. 3, pp. 1196 - 1204, 2015.

J. M. Guerrero, M. Chandorkar, T.-L. Lee and P. C. Loh, “Advanced Control Architectures for Intelligent Microgrids—Part I: Decentralized and Hierarchical Control,” IEEE Transactions on Industrial Electronics, vol. 60, no. 4, pp. 1254 - 1262, 2013.

Q. Shafiee , J. Guerrero und . J. Vasquez, „Distributed Secondary Control for Islanded Microgrids—A Novel Approach,“ IEEE Transactions on Power Electronics, Bd. 29, Nr. 2, pp. 1018 - 1031, 2013.

H. Farag und E. El-Saadany, „A Novel Cooperative Protocol for Distributed Voltage Control in Active Distribution Systems,“ IEEE Transactions on Power Systems, Bd. 28, Nr. 2, pp. 1645 - 1656 , 2013.

M. Prodanovic and T. Green, “High-Quality Power Generation Through Distributed Control of a Power Park Microgrid,” IEEE Transactions on Industrial Electronics, vol. 53, no. 5, pp. 1471 - 1482, 2006.

X. Huanhai , Q. Zhihua , J. Seuss und A. Maknouninejad, „A Self-Organizing Strategy for Power Flow Control of Photovoltaic Generators in a Distribution Network,“ IEEE Transactions on Power Systems, Bd. 26, Nr. 3, pp. 1462 - 1473 , 2011.

A. Vaccaro, V. Loia, G. Formato, P. Wall und . V. Terzija, „A Self-Organizing Architecture for Decentralized Smart Microgrids Synchronization, Control, and Monitoring,“ IEEE Transactions on Industrial Informatics, Bd. 11, Nr. 1, pp. 289 - 298 , 2015.

M. A. Awal, H. Yu, H. Tu, S. M. Lukic and I. Husain, “Hierarchical Control for Virtual Oscillator Based Grid-Connected and Islanded Microgrids,” IEEE Transactions on Power Electronics, vol. 35, no. 1, pp. 988 - 1001, 2020.

F. Katiraei, M. Iravani and P. Lehn, “Small-signal dynamic model of a micro-grid including conventional and electronically interfaced distributed resources,” IET Generation, Transmission & Distribution, vol. 1, no. 3, pp. 369 - 378, 2007.

J. M. Guerrero, J. Matas, L. G. d. Vicuna, M. Castilla and J. Miret, “Decentralized Control for Parallel Operation of Distributed Generation Inverters Using Resistive Output Impedance,” IEEE Transactions on Industrial Electronics, vol. 54, no. 2, pp. 994 - 1004, 2007.

K. D. Brabandere, B. Bolsens, J. V. d. Keybus, A. Woyte, J. Driesen and R. Belmans, “A Voltage and Frequency Droop Control Method for Parallel Inverters,” IEEE Transactions on Power Electronics, vol. 22, no. 4, pp. 1107 - 1115, 2007.

Y. W. Li and C.-N. Kao, “An Accurate Power Control Strategy for Power-Electronics-Interfaced Distributed Generation Units Operating in a Low-Voltage Multibus Microgrid,” IEEE Transactions on Power Electronics, vol. 24, no. 12, pp. 2977 - 2988, 2009.

R. Majumder, A. Ghosh, G. Ledwich and F. Zare, “Angle droop versus frequency droop in a voltage source converter based autonomous microgrid,” in 2009 IEEE Power & Energy Society General Meeting, Calgary, 2009.

E. Rokrok and M. Golshan, “Adaptive voltage droop scheme for voltage source converters in an islanded multibus microgrid,” IET Generation, Transmission & Distribution, vol. 4, no. 5, pp. 562 - 578, 2010.

S. Zuo, A. Davoudi, Y. Song and F. L. Lewis, “Distributed Finite-Time Voltage and Frequency Restoration in Islanded AC Microgrids,” IEEE Transactions on Industrial Electronics, vol. 63, no. 10, pp. 5988 - 5997, 2016.

Y.-S. Kim, E.-S. Kim and S.-I. Moon, “Distributed Generation Control Method for Active Power Sharing and Self-Frequency Recovery in an Islanded Microgrid,” IEEE Transactions on Power Systems, vol. 32, no. 1, pp. 544 - 551, 2017.

J. Rocabert, A. Luna, F. Blaabjerg und P. Rodríguez, „Control of Power Converters in AC Microgrids,“ IEEE Transactions on Power Electronics, Bd. 27, Nr. 11, pp. 4734 - 4749 , 2012.

. I. Balaguer, Qin Lei , Shuitao Yang, . U. Supatti und Fang Zheng Peng, „Control for Grid-Connected and Intentional Islanding Operations of Distributed Power Generation,“ IEEE Transactions on Industrial Electronics, Bd. 58, Nr. 1, pp. 147 - 157 , 2011.




DOI: http://doi.org/10.11591/ijpeds.v12.i2.pp%25p

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