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8 - Operation and control

from Part III - Integration

Published online by Cambridge University Press:  05 July 2016

Alexis Kwasinski ,
Wayne Weaver  and
Robert S. Balog
Alexis Kwasinski
Affiliation:
University of Texas, Austin
Wayne Weaver
Affiliation:
Michigan Technological University
Robert S. Balog
Affiliation:
Texas A & M University
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Summary

This chapter discusses operation and control aspects related to the system architectures presented in Chapter 7. The basic focus in this chapter is on discussing control strategies that can mitigate stability issues found in systems in which most of the loads have power electronic interfaces that make them operate as CPLs. Another major focus of this chapter is on control systems architecture and methodologies, especially oriented toward autonomous controls. This chapter presents advanced control concepts, including nonlinear and game-theoretic techniques, and concepts related to linear and geometric controllers for converters operation with CPLs.

Autonomous controls of LAPES

Some of the goals in relying on a LAPES for powering loads are to achieve higher power supply availability than from a bulk power grid and to realize more flexible and optimal ways to utilize electric power at a local level. However, the mere use of local distributed generation units does not necessarily imply a local improvement in system availability or efficiency over conventional grids, as it is commonly implied [1]. As explained in Chapter 2, to achieve high availability a system needs to maintain full operation even when one or more failures occur, i.e., it needs to be fault tolerant. One of the main premises in the design of fault-tolerant systems is to avoid single points of failure.

Some of the microgrid architectures currently proposed have a centralized controller that controls the power flow from each source and monitors the overall system condition [2]. This control architecture has several disadvantages, including limited flexibility and high risk of failure due to the presence of a single point of failure in the controller [3]. In some cases, critical components of systems with centralized controllers are designed to maintain the configuration and operational state so the entire system does not fail if the controller fails. However, keeping the system functioning is often achieved at the expense of some operational features, such as energy efficiency. Implementation of other desired operational functions, such as current sharing among source interfaces, may also affect system availability. Current sharing is implemented to balance operational stresses in power sources’ electronic interfaces. In a system with current sharing, source interfaces are controlled so they all have output currents proportional to their power ratings.

Type
Chapter
Information
Microgrids and other Local Area Power and Energy Systems , pp. 337 - 393
Publisher: Cambridge University Press
Print publication year: 2016

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References

[1] Kwasinski, A. and Krein, P. T., “Optimal Configuration Analysis of a Microgrid-Based Telecom Power System,” in Proc. 2006 International Telecommunications Energy Conference (INTELEC), September 2006, pp. 602–609.
[2] Takeda, T., Fukui, A., Matsumoto, A., Hirose, K., and Muroyama, S., “Power Quality Assurance by Using Integrated Power System,” Proc. INTELEC, 2006, pp. 261–269.
[3] Balog, R. S., “Autonomous Local Control in Distributed dc Power Systems,” Ph.D. dissertation, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 2006.
[4] Guerrero, J. M., Vasquez, J. C., Matas, J., Vicuña, L. Garcia de, and Castilla, M, “Hierarchical Control of Droop-Controlled AC and DC Microgrids – A General Approach toward Standardization,” IEEE Transactions Industrial Electronics, vol. 58, no. 1, January 2011, pp. 158–172.Google Scholar
[5] Boroyevich, D., Cvetković, I., Dong, D., Burgos, R., Wang, F., and Lee, F., “Future Electronic Power Distribution Systems – A Contemplative View,” Proc. 2010 12th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), pp. 1369–1380.
[6] Kwasinski, A., “A Microgrid Architecture With Multiple-Input Dc/Dc Converters: Applications, Reliability, System Operation, and Control,” Ph.D. dissertation, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 2007.
[7] Vandoorn, T. L., Meersman, B., Kooning, J. D. M. De, and Vandevelde, L., “Analogy Between Conventional Grid Control and Islanded Microgrid Control Based on a Global DC-Link Voltage Droop,” IEEE Transactions on Power Delivery, vol. 27, no. 3, July 2012, pp. 1405–1414.Google Scholar
[8] Justo, J. J., Mwasilu, F., Lee, J., and Jung, J-W., “AC-Microgrids versus DC-Microgrids with Duted Energy Resources: A Review,” Renewable and Sustainable Energy Reviews, vol. 24, August 2013, pp. 387–405.Google Scholar
[9] Vasquez, J. C., Guerrero, J. M., Luna, A., Rodriguez, P., and Teodorescu, R., “Adaptive Droop Control Applied to Voltage-Source Inverters Operating in Grid-Connected and Islanded Modes,” IEEE Transactions on Industrial Electronics, vol. 56, no. 10, October 2009, pp. 4088–4096.Google Scholar
[10] Piagi, P. and Lasseter, R. H., “Autonomous Control of Microgrids,” Proc. 2006 IEEE Power Society General Meeting.
[11] Torres, M. and Lopes, L. C. A., “Virtual Synchronous Generator: A Control Strategy to Improve Dynamic Frequency Control in Autonomous Power Systems,” Energy and Power Engineering, vol. 5, no. 2A, April 2013, pp. 32–38.Google Scholar
[12] Engler, A., “Applicability of Droops in Low Voltage Grids,” International Journal Distributed Resources, vol. 1, no. 1, September 2004, pp. 3–15.Google Scholar
[13] Balog, R. S., Weaver, W. W., and Krein, P. T., “The Load as an Energy Asset in a Distributed DC SmartGrid Architecture,” IEEE Transactions on Smart Grid, vol. 3, no. 1, March 2012, pp. 253–260.Google Scholar
[14] Bottrell, N., Prodanovic, M., and Green, T. C., “Dynamic Stability of a Microgrid With an Active Load.” IEEE Transactions on Power Electronics, vol. 28, no. 11, November 2013, pp. 5107–5119.Google Scholar
[15] Bottrell, N., Prodanovic, M., and Green, T. C., “Dynamic Stability of a Microgrid with an Active Load,” IEEE Transactions on Power Electronics, vol. 28, no. 11, November 2013, pp. 5107–5119.Google Scholar
[16] Kwasinski, A. and Onwuchekwa, C. N., “Dynamic Behavior and Stabilization of DC Microgrids with Instantaneous Constant-Power Loads,” IEEE Transactions on Power Electronics, vol. 26, no. 3, March 2011, pp. 822–834.Google Scholar
[17] Kwasinski, A. and Krein, P. T., “Passivity-Based Control of Buck Converters with Constant-Power Loads,” Power Electronics Specialist Conference 2007 (PESC), pp. 259–265.
[18] Kwasinski, A. and Krein, P. T., “Stabilization of Constant Power Loads in DC-DC Converters Using Passivity-Based Control,” 2007 International Telecommunications Energy Conference (INTELEC), pp. 867–874.
[19] Khalil, H. K.. Nonlinear Systems, edition. Upper Saddle River, NJ: Prentice Hall, 2002.
[20] Gadoura, I., Grigore, V., Hatonen, J., Kyyra, J., Vallittu, P., and Suntio, T., “Stabilizing a Telecom Power Supply Feeding a Constant Power Load,” Proc. INTELEC 1998, pp. 243–248.
[21] Srinivasan, M. and Kwasinski, A., “Autonomous Hierarchical Control of dc Microgrids with Constant-Power Loads,” Proc. APEC 2015, pp. 2808–2815.
[22] Onwuchekwa, C. N. and Kwasinski, A., “Analysis of Boundary Control for Buck Converters with Instantaneous Constant-Power Loads,” IEEE Transactions on Power Electronics, vol. 25, no. 8, August 2010, pp. 2018–2032.Google Scholar
[23] Onwuchekwa, C. N. and Kwasinski, A., “Analysis of Boundary Control for Boost and Buck-Boost Converters in Distributed Power Architectures with Constant-Power Loads,” IEEE Applied Power Electronics Conference (APEC) 2011, pp. 1816–1823.
[24] Weaver, W. W. and Krein, P. T., “Game-Theoretic Control of Small-Scale Power Systems,” IEEE Transactions on Power Delivery, vol. 24, no. 3, 2009, pp. 1560–1567.Google Scholar
[25] Başar, T. and Olsder, G. J., Dynamic Noncooperative Game Theory, ed. Philadelphia, PA: SIAM, 1999.
[26] Isaacs, R., Differential Games: A Mathematical Theory with Applications to Warfare and Pursuit, Control and Optimization. New York, NY: John Wiley & Sons, 1965.
[27] Greene, S., Dobson, I., and Alvarado, F. L., “Contingency Ranking for Voltage Collapse via Sensitivities from a Single Nose Curve,” IEEE Transactions on Power Systems, vol. 14, 1999, pp. 232–240.Google Scholar
[28] Owen, G., Game Theory, ed. New York, NY: Academic Press, 2001.
[29] Weaver, W. W., “Geometric and Game-Theoretic Control of Energy Assets in Small-Scale Power Systems,” Ph.D. dissertation, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 2007.
[30] Katiraei, F. and Iravani, M. R., “Power Management Strategies for a Microgrid with Multiple Distributed Generation Units,” IEEE Transactions on Power Systems, vol. 21, 2006, pp. 1821–1831.Google Scholar
[31] Andreoiu, A. and Bhattacharya, K., “Game Theory Based Evaluation of PSS Control Effort,” Proceedings, IEEE Power Engineering Society General Meeting, vol. 1, 2005, pp. 548–591.Google Scholar

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