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Power Balancing Strategy in the Microgrid During Transient

마이크로그리드 과도상태 시 전력 수급 균형 전략

  • 서재진 ((주)효성 중공업연구소 솔루션기술팀) ;
  • 이학주 (전력연구원(KEPRI)) ;
  • 정원욱 (전력연구원(KEPRI)) ;
  • 원동준 (인하대학교 IT공과대학 전기공학부)
  • Received : 2009.11.27
  • Accepted : 2010.02.12
  • Published : 2010.04.01

Abstract

When problems such as line fault, breakdown of a substation or a generator, etc. arise on the grid, the Microgrid is designed to be separated or isolated from the grid. Most existing DGs(Distributed Generators) in distribution system use rotating machine. However, new DGs such as micro gas turbine, fuel cell, photo voltaic, wind turbine, etc. will be interfaced with the Microgrid through an inverter. So the Microgrid may have very lower inertia than the conventional distribution system. By the way, the rate of change of frequency depends on the inertia of the power system. Moreover, frequency has a strong coupling with active power in power system. Because the frequency of the Microgrid may change rapidly and largely during transient, appropriate and fast control strategy is needed for stable operation of the Microgrid. Therefore, this paper presents a power balancing strategy in Microgrid during transient. Despite of strong power or frequency excursions, power balancing in the Microgrid can be maintained.

Keywords

Microgrid;Distributed Generator;Power balancing;Frequency Droop Control, Controllable Load;Load shedding

Acknowledgement

Supported by : 전력연구원

References

  1. V. Chuvychin, N. Gurov, S. Rubcov, "Adaptive Underfrequency Load Shedding and Underfrequency Load Restoration System", Power Tech, 2005 IEEE Russia, 27-30 June 2005, pp. 1-6
  2. R. Lasseter, P. Piagi, "Control and design of Microgrid Components", Power System Engineering Research Center, final project report, Jan. 2006
  3. Susan M. Schoenung, "Characteristics and Technologies for Long-vs. Short-Term Energy Storage", A Study by the DOE Energy Storage Systems Program March 2001
  4. Shinichi Imai, Tadaaki Yasuda, "UFLS program to ensure stable island operation", Power Systems Conference and Exposition, 2004. IEEE PES 10-13 Oct. 2004, pp. 283-288 Vol. 1
  5. E.Barklund; et al, "Energy Management in Autonomous Microgrid Using Stability-Constrained Droop Control of Inverters", IEEE Trans. on Power Electronis, Vol. 23, NO. 5, SEPTEMBER 2008
  6. Ir. N. Perumal, Chan Chee Ying, "A Proposed Strategy of Implementation Load Shedding and Load Recovery with Dynamic Simulations", National Power & Energy Conference (PECon) 2004 Proceedings, Kuala Lumpur, Malaysia
  7. Ali Mihirig, Hong Nguyen, Andrew J. Allen, "ON-LINE FAST LOAD SHEDDING TO MAINTAIN SYSTEM STABILITY AND OPERATION FOR ISOLATED OIL FIELD POWER SYSTEM", Petroleum and Chemical Industry Conference, 2006. PCIC '06. Record of Conference Papers - IEEE Industry Applications Society 53rd Annual 11-15 Sept. 2006, pp. 1-7
  8. Kundur P., "Power System Stability and Control" (book), McGraw-Hill, Inc. 1994
  9. S.-J. Huang, C.-C. Huang, "An adaptive load shedding method with time-based design for isolated power system", International Journal of Electrical Power & Energy Systems, Vol. 22, Issue 1, January 2000, pp. 51-58 https://doi.org/10.1016/S0142-0615(99)00035-6
  10. Joao Pecas Lopes; et al, DD1 - "Emergency Strategies and Algorithms", UMIST CONTRIBUTION, EU MicroGrids project deliverable of task DD1, 2004