DC-bus Voltage Control for PV Grid-connected Inverter Based on Nonlinear Disturbance Observer

被引：0
|
作者：
Liu X. [1 ]
Gao C. [1 ]
Wang Z. [1 ]
机构：
[1] College of Information Science and Engineering, Northeastern University, Shenyang, 110819, Liaoning
来源：
Dianwang Jishu/Power System Technology | 2020年 / 44卷 / 03期
基金：
中国国家自然科学基金;
关键词：
DC-bus voltage; DPC; Dual closed-loop control; Feed-forward; NDO; PV grid-connected inverter;
D O I：
10.13335/j.1000-3673.pst.2019.0223
中图分类号：
学科分类号：
摘要：
In grid-connected photovoltaic (PV) power system, DC-bus voltage has a large extent of fluctuation when the output power of PV panels changes suddenly. If not controlled properly, the DC-bus voltage fluctuation will directly affect normal operation of system. To improve DC-bus voltage control performance, a nonlinear disturbance observer (NDO) based direct power control (DPC) scheme is proposed. The output power is observed in real time using the NDO without additional sensors, and added to power inner-loop as feed-forward power, facilitating response performance to input disturbance power. For power inner loop, the control input is redefined to eliminate synchronous rotating coordinate transformation. Details on the design of the observer and the power inner loop are presented in this paper. Meanwhile, the parameter tuning methods of inner and outer loops are given. Finally, correctness and effectiveness of the proposed scheme are verified by simulation results. © 2020, Power System Technology Press. All right reserved.
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页码：897 / 906
页数：9
相关论文
共 27 条
  • [1] Liao C.Y., Lin W.S., Chen Y.M., Et al., A pv micro-inverter with PV current decoupling strategy, IEEE Transactions on Power Electronics, 32, 8, pp. 6544-6557, (2017)
  • [2] Dong M., Luo A., Design and control strategies of inverters for a grid-connected photovoltaic power system, Automation of Electric Power Systems, 30, 20, pp. 97-102, (2006)
  • [3] Khajehoddin S.A., Karimi-Ghartemani M., Et al., A review of the single phase photovoltaic module integrated converter topologies with three different DC link configurations, IEEE Transactions on Power Electronics, 28, 7, pp. 3245-3254, (2013)
  • [4] Wang C., Li X., Guo L., Et al., A nonlinear-disturbance-observer-based DC-Bus voltage control for a hybrid AC/DC microgrid, IEEE Transactions on Power Electronics, 29, 11, pp. 6162-6177, (2014)
  • [5] Blaabjerg F., Teodorescu R., Et al., Overview of control and grid synchronization for distributed power generation systems, IEEE Transactions on Industrial Electronics, 53, 5, pp. 1398-1409, (2006)
  • [6] Zargari N.R., Joos G., Performance investigation of a current-controlled voltage-regulated PWM rectifier in rotating and stationary frames, IEEE Transactions on Industrial Electronics, 42, 4, pp. 396-401, (1995)
  • [7] Timbus A., Liserre M., Teodorescu R., Et al., Evaluation of current controllers for distributed power generation systems, IEEE Transactions on Power Electronics, 24, 3, pp. 654-664, (2009)
  • [8] Noguchi T., Tomiki H., Kondo S., Et al., Direct power control of PWM converter without power source voltage sensors, IEEE Transactions on Industry Applications, 34, 6, pp. 473-479, (1998)
  • [9] Zhang Y., Qu C., Direct power control of a pulse width modulation rectifier using space vector modulation under unbalanced grid voltages, IEEE Transactions on Power Electronics, 30, 10, pp. 5892-5901, (2015)
  • [10] Gui Y., Li M., Lu J., Et al., A voltage modulated dpc approach for three-phase pwm rectifier, IEEE Transactions on Industrial Electronics, 65, 10, pp. 7612-7619, (2018)
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