Improved dynamic control method for energy storage units in PV dominated microgrids

• Autorzy: Wang Q. , Liu Y. , Song W. , Xuan K.

Identyfikatory

DOI

10.24425/aee.2018.124747

• Języki publikacji: EN

Abstrakty

EN

In a PV-dominant DC microgrid, the traditional energy distribution method based on the droop control method has problems such as output voltage drop, insufficient power distribution accuracy, etc. Meanwhile, different battery energy storage units usually have different parameters when the system is running. Therefore, this paper proposes an improved control method that introduces a reference current correction factor, and a weighted calculation method for load power distribution based on the parameters of battery energy storage units is proposed to achieve weighted allocation of load power. In addition, considering the variation of bus voltage at the time of load mutation, voltage secondary control is added to realize dynamic adjustment of DC bus voltage fluctuation. The proposed method can achieve balance and stable operation of energy storage units. The simulation results verified the effectiveness and stability of the proposed control strategy.

Słowa kluczowe

EN

current correction coefficient; load distribution; PV DC microgrid; secondary control; weighted calculation

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2018
• Tom: Vol. 67, nr 4
• Strony: 885--898
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wz.

Twórcy

autor

Wang Q.

• Northeast Forestry University 26 Hexing Road, Xiangfang District, Harbin, China

autor

Liu Y.

• Northeast Forestry University 26 Hexing Road, Xiangfang District, Harbin, China

autor

Song W.

• Northeast Forestry University 26 Hexing Road, Xiangfang District, Harbin, China

autor

Xuan K.

• State Grid Company, Heilongjiang Branch 85 Wenjing street, Xiangfang District, Harbin, China

Bibliografia

• [1] Liu L., Mi Z., Ren C., Qin W., Han X., Wang P., Coordination control strategy of DC microgrid with two DC buses based on power pool, 2017 12th IEEE Conference on Industrial Electronics and Applications (ICIEA), Siem Reap, KHM, pp. 1437–1442 (2017).
• [2] Zhang L., Wang Y., Li H., Sun P., Hierarchical coordinated control of DC microgrid with wind turbines, IECON 2012 – 38th Annual Conference on IEEE Industrial Electronics Society, Montreal, QC, pp. 3547–3552 (2012).
• [3] Anand S., Fernandes B. G., Guerrero J., Distributed Control to Ensure Proportional Load Sharing and Improve Voltage Regulation in Low-Voltage DC Microgrids, IEEE Transactions on Power Electronics, vol. 28, no. 4, pp. 1900–1913 (2013).
• [4] Tsikalakis A. G., Hatziargyriou N. D., Centralized Control for Optimizing Microgrids Operation, IEEE Transactions on Energy Conversion, vol. 23, no. 1, pp. 241–248 (2008).
• [5] Anand S., Fernandes B. G., Modified droop controller for paralleling of dc-dc converters in standalone dc system, IET Power Electronics, vol. 5, no. 6, pp. 782–789 (2012).
• [6] Augustine S., Mishra M. K., LakshminarasammaN., Adaptive Droop Control Strategy for Load Sharing and Circulating Current Minimization in Low-Voltage Standalone DC Microgrid, IEEE Transactions on Sustainable Energy, vol. 6, no. 1, pp. 132–141 (2015).
• [7] Hu R., Weaver W. W., Dc microgrid droop control based on battery state of charge balancing, 2016 IEEE Power and Energy Conference at Illinois (PECI), Urbana, IL, pp. 1–8 (2016).
• [8] Liu C., Zhao J., Wang S., Lu W., Qu K., Active Identification Method for Line Resistance in DC Microgrid Based on Single Pulse Injection, IEEE Transactions on Power Electronics, vol. 33, no. 7, pp. 5561–5564 (2018).
• [9] Lu X., Guerrero J. M., Sun K., Vasquez J. C., An Improved Droop Control Method for DC Microgrids Based on Low Bandwidth Communication with DC Bus Voltage Restoration and Enhanced Current Sharing Accuracy, IEEE Transactions on Power Electronics, vol. 29, no. 4, pp. 1800–1812 (2014).
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• [11] Xu Q. et al., A Decentralized Dynamic Power Sharing Strategy for Hybrid Energy Storage System in Autonomous DC Microgrid, IEEE Transactions on Industrial Electronics, vol. 64, no. 7, pp. 5930–5941 (2017).
• [12] Hoang K. D., Lee H. H., Accurate Power Sharing with Balanced Battery State of Charge in Distributed DC Microgrid, IEEE Transactions on Industrial Electronics, in press (2018).
• [13] Lu X., Sun K., Guerrero J. M., Vasquez J. C., Huang L., Teodorescu R., SoC-based droop method for distributed energy storage in DC microgrid applications, 2012 IEEE International Symposium on Industrial Electronics, Hangzhou, CHN, pp. 1640–1645 (2012).
• [14] Yu X., She X., Ni X., Huang A. Q., System Integration and Hierarchical Power Management Strategy for a Solid-State Transformer Interfaced Microgrid System, IEEE Transactions on Power Electronics, vol. 29, no. 8, pp. 4414–4425 (2014).
• [15] Ahmadi R., Paschedag D., Ferdowsi M., Closed-loop input and output impedances of DC-DC switching converters operating in voltage and current mode control, IECON 2010 – 36th Annual Conference on IEEE Industrial Electronics Society, Glendale, AZ, pp. 2311–2316 (2010).

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).