Power control strategy of parallel inverter interfaced DG units

In this paper, a power control strategy for parallel inverters of DGs, which are connected to harmonic polluted grids, is proposed. In order to optimize the controller performance, the dual-time sampling scheme is implemented. Also, the parameters of the controller are optimized by harmony search algorithm. The simulation results show that by using this scheme the system control delay is minimized, and the proposed controller presents a high performance even under presence of system harmonics or fault.

[1]  Hauck Matthias,et al.  Control of a Three Phase Inverter Feeding an Unbalanced Load and Operating in Parallel with Other Power Sources , 2002 .

[2]  J. Miret,et al.  A wireless controller to enhance dynamic performance of parallel inverters in distributed generation systems , 2004, IEEE Transactions on Power Electronics.

[3]  Ki-Yeon Joe,et al.  Parallel operation of three-phase UPS inverters by wireless load sharing control , 2000, INTELEC. Twenty-Second International Telecommunications Energy Conference (Cat. No.00CH37131).

[4]  M. M. Morcos,et al.  Coordinating Overcurrent Protection and Voltage Sag in Distributed Generation Systems , 2002, IEEE Power Engineering Review.

[5]  R. Iravani,et al.  A three-level converter based micro-turbine distributed generation system , 2006, 2006 IEEE Power Engineering Society General Meeting.

[6]  H. van der Broeck,et al.  Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors , 1986, 1986 Annual Meeting Industry Applications Society.

[7]  Chih-Chiang Hua,et al.  Parallel operation of inverters for distributed photovoltaic power supply system , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[8]  Xie Shaojun,et al.  Research on the Power Sharing of the Parallel Inverters without Control Interconnection Basing on Droop Characteristic , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[9]  K.. De Brabandere,et al.  A Voltage and Frequency Droop Control Method for Parallel Inverters , 2007, IEEE Transactions on Power Electronics.

[10]  Wu Weiyang,et al.  Improved Control for Parallel Inverter with Current-Sharing Control Scheme , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[11]  K. Mauch,et al.  Control of parallel inverters in distributed AC power systems with consideration of the line impedance effect , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[12]  D. Rathnakumar,et al.  A new software implementation of space vector PWM , 2005, Proceedings. IEEE SoutheastCon, 2005..

[13]  Dong-Seok Hyun,et al.  A novel PWM scheme for a three-level voltage source inverter with GTO thyristors , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[14]  Frede Blaabjerg,et al.  Sharing of nonlinear load in parallel connected three-phase converters , 2000 .

[15]  Tsai-Fu Wu,et al.  Parallel-Inverter System With Failure Isolation and Hot-Swap Features , 2007, IEEE Transactions on Industry Applications.

[16]  M. Castilla,et al.  A wireless load sharing controller to improve dynamic performance of parallel-connected UPS inverters , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[17]  L.A. Kojovic,et al.  Summary of Distributed Resources Impact on Power Delivery Systems , 2008, IEEE Transactions on Power Delivery.

[18]  Stavros A. Papathanassiou.  A technical evaluation framework for the connection of DG to the distribution network , 2007 .

[19]  P. K. Sen,et al.  Benefits of Power Electronic Interfaces for Distributed Energy Systems , 2010, IEEE Transactions on Energy Conversion.

[20]  Lennart Söder,et al.  Distributed generation : a definition , 2001 .

[21]  Tsai-Fu Wu,et al.  ACSS for paralleled multi-inverter systems with DSP-based robust controls , 2003 .

[22]  T.-F. Wu,et al.  Design and implementation of a paralleled inverter system with failure isolation and hot-swap features , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[23]  M.T. Doyle,et al.  Reviewing the impacts of distributed generation on distribution system protection , 2002, IEEE Power Engineering Society Summer Meeting,.

[24]  Dehong Xu,et al.  Modeling, analysis, and implementation of parallel multi-inverter systems with instantaneous average-current-sharing scheme , 2003 .

[25]  Gevork B. Gharehpetian,et al.  Power factor improvement of DC/DC converter of micro-turbines , 2008 .

[26]  J. R. McDonald,et al.  Dynamics of distribution networks with distributed generation , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[27]  Lipei Huang,et al.  Novel control for redundant parallel UPSs with instantaneous current sharing , 2002, Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579).

[28]  T. Ackermann,et al.  Interaction between distributed generation and the distribution network: operation aspects , 2002, IEEE/PES Transmission and Distribution Conference and Exhibition.

[29]  Zong Woo Geem,et al.  Harmony Search for Generalized Orienteering Problem: Best Touring in China , 2005, ICNC.

[30]  Chee-Mun. Ong,et al.  Dynamic simulation of electric machinery : using MATLAB/SIMULINK , 1997 .

[31]  Dong-Seok Hyun,et al.  A master and slave control strategy for parallel operation of three-phase UPS systems with different ratings , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[32]  Yan Du,et al.  Communicationless Parallel Inverters Based on Inductor Current Feedback Control , 2007, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[33]  Jun Liang,et al.  Evaluation of repetitive control for power quality improvement of distributed generation , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[34]  P.P. Barker,et al.  Determining the impact of distributed generation on power systems. I. Radial distribution systems , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[35]  Tsai-Fu Wu,et al.  CWDC strategy for paralleled multi-inverter systems achieving a weighted output current distribution , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[36]  S. Sivakumar,et al.  Modeling, analysis and control of bidirectional power flow in grid connected inverter systems , 2002, Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579).

[37]  Caisheng Wang,et al.  Control of PEM fuel cell distributed generation systems , 2006, 2006 IEEE Power Engineering Society General Meeting.

[38]  Yangguang Yan,et al.  Circulating current's characteristics analysis and the control strategy of parallel system based on double close-loop controlled VSI , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[39]  Roger C. Dugan,et al.  Distributed generation , 2002 .

[40]  Paul C. Krause,et al.  Analysis of electric machinery , 1987 .

[41]  K. Lee,et al.  A new structural optimization method based on the harmony search algorithm , 2004 .

[42]  S. R. Wall,et al.  Performance of inverter interfaced distributed generation , 2001, 2001 IEEE/PES Transmission and Distribution Conference and Exposition. Developing New Perspectives (Cat. No.01CH37294).

[43]  T.-F. Wu,et al.  A 3C strategy for multi-module inverters in parallel operation to achieve an equal current distribution , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[44]  R.N. Patel,et al.  Modeling and simulation of microturbine based distributed generation system , 2006, 2006 IEEE Power India Conference.

[45]  Jixiang Zhao,et al.  Modeling and Analysis of Stability for Parallel Inverters Operated with Instantaneous Maximum Current Control Strategy , 2006, The Proceedings of the Multiconference on "Computational Engineering in Systems Applications".

[46]  Zong Woo Geem,et al.  Harmony Search Optimization: Application to Pipe Network Design , 2002 .