LIU Zhen, BAO Wei. Research on Control Strategy of Synchronous Voltage Source Converter Based on Complex Virtual Impedance in Microgrid[J]. Modern Electric Power, 2014, 31(2): 60-65.
Citation: LIU Zhen, BAO Wei. Research on Control Strategy of Synchronous Voltage Source Converter Based on Complex Virtual Impedance in Microgrid[J]. Modern Electric Power, 2014, 31(2): 60-65.

Research on Control Strategy of Synchronous Voltage Source Converter Based on Complex Virtual Impedance in Microgrid

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  • Received Date: June 09, 2013
  • Published Date: April 08, 2014
  • Due to not considering the impact of feeder impedance between distributed sources, conventional synchronous voltage source converter control based on droop characteristic curve will influence system stability and power sharing when applied in distributed resources of microgrid. In this paper, an improved synchronous voltage source converter control based on complex virtual impedance is proposed, in which complex virtual impedance is introduced to reduce the power coupling caused by resistive component in feeder impedance model, and an improved voltage/reactive power droop control is proposed to eliminate reactive power sharing errors due to unequal the line impedance per unit value by introducing voltage feedback on public load nodes. Accurate system power sharing can be achieved by the improved synchronous voltage source control, and the quality of power supply is improved. In the end, the validity of control algorithm is verified by simulations.
  • 时姗姗,鲁宗相,周双喜,等.中国微电网的特点和发展方向 [J].中国电力,2009,42(7):2125.
    鲁宗相,王彩霞,闵勇,等.微电网研究综述[J].电力系统自动化,2007,31(19):2534.
    苏玲,张建华,王利.微电网相关问题及技术研究 [J].电力系统保护与控制,2010,38(19):235239.
    KATIRAEL F, IRAVANI M R, LEHN P W. Micro-grid autonomous operation during and subsequent to islanding process[J].IEEE Trans. on Power Delivery,2005,20(1):248257.
    锆登科,姜建国,张宇华.使用电压相角下垂控制的微电网控制策略设计[J].电力系统自动化,2012,36(5):2934.
    Chandorkar M C, Divan D M,Adapa R. Control of parallel connected inverters in standalone ac supply systems[J]. IEEE Trans.on Industrial Application, 1993,29(1):136143.
    LI Yunwei, KAO Chingnan. An accurate power control strategy for power-electronics-interfaced distributed generation units operating in a low-voltage mutibus microgrid[J]. IEEE Trans. on Power Electronics, 2009,24(12):29772988.
    Ritwik Majumder, Balarko Chaudhuri, Arindam Ghosh. Improvement of stability and load sharing in autonomous microgrid using supplementary droop control loop[J]. IEEE Trans. on Power System, 2010,25(2):796808.
    Tuladhar A, Jin H, Unger T. Control of parallel inverters in distributed ac power system with consideration of line impedance effect[J]. IEEE Trans.on Industrial Application,2000,36(1):131138.
    He Jinwei, Li Yunwei. An enhanced microgrid load demand sharing strategy[J]. IEEE Trans. on Power Electronics, 2012,27(9):39843995.
    Aboutableb Haddadi, Geza Joos. Load sharing of autonomous distribution-level microgrids[C]∥Power and Energy Society General Meeting, San Diego,2011.
    Lee Chia-Tse, Chu Chia-Chi, Cheng Po-Tai. A new droop control method for the autonomous operation of distributed energy resource inverters[C]∥Energy Conversion Congress and Exposition (ECCE),Atlanta,GA,2010.
    Liu Ting, Liu Jinjun, Zhang Xuan. A novel droop control strategy to share power equally and limit voltage deviation[C]∥ 8th International Conference on Power Electronics-ECCE Asia , 2011.
    程军照,李澍森,吴在军,等.微电网下垂控制中虚拟电抗的功率解耦机理分析[J].电力系统自动化,2012,36(7):2732.
    于玮,徐德鸿.基于虚拟阻抗的不间断电源并联系统均流控制[J].中国电机工程学报,2009,29(24):3239.

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