Control of distributed generation systems - Part II: Load sharing control

This work is concerned with the control strategy for the parallel operation of distributed generation systems (DGS) in a standalone ac power supply. The proposed control method uses only low-bandwidth data communication signals between each generation system in addition to the locally measurable feedback signals. This is achieved by combining two control methods: droop control method and average power control method. The average power method with slow update rate is used in order to overcome the sensitivity about voltage and current measurement errors. In addition, a harmonic droop scheme for sharing harmonic content of the load currents is proposed based on the voltages and currents control algorithm. Experimental and simulation studies using two parallel three-phase pulsewidth modulation (PWM) inverters are presented to show the effectiveness of the proposed control.

[1]  Phoivos D. Ziogas.  Optimum Voltage and Harmonic Control PWM Techniques for Three-Phase Static UPS Systems , 1980, IEEE Transactions on Industry Applications.

[2]  E. Davison,et al.  Perfect control of the robust servomechanism problem , 1987 .

[3]  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.

[4]  R. Adapa,et al.  Control of parallel connected inverters in stand-alone AC supply systems , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[5]  J. Gutierrez-Vera.  Use of renewable sources of energy in Mexico case: San Antonio Agua Bendita , 1994 .

[6]  Deepak Divan,et al.  Novel architectures and control for distributed UPS systems , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[7]  Deepak Divan,et al.  Control of distributed UPS systems , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[8]  Deepak Divan,et al.  Decentralized operation of distributed UPS systems , 1996, Proceedings of International Conference on Power Electronics, Drives and Energy Systems for Industrial Growth.

[9]  K. Mauch,et al.  Parallel operation of single phase inverter modules with no control interconnections , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[10]  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.

[11]  F. Profumo,et al.  Control strategy of a power line conditioner for cogeneration plants , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[12]  Vadim I. Utkin,et al.  Sliding mode control in electromechanical systems , 1999 .

[13]  O. Dranga,et al.  Standby power supply using alternative energy through co-generation technologies , 2000, TELESCON 2000. Third International Telecommunications Energy Special Conference (IEEE Cat. No.00EX424).

[14]  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).

[15]  Hua Jin,et al.  Control of parallel inverters in distributed AC power systems with consideration of line impedance effect , 2000 .

[16]  B. Maurhoff,et al.  Dispersed generation-reduce power costs and improve service reliability , 2000, 2000 Rural Electric Power Conference. Papers Presented at the 44th Annual Conference (Cat. No.00CH37071).

[17]  L.J.J. Offringa,et al.  A 1600 kW IGBT converter with interphase transformer for high speed gas turbine power plants , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[18]  Hiroyuki Ohsaki,et al.  Power factor correction in a turbine-generator-converter system , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[19]  L. Philipson.  Distributed and dispersed generation: addressing the spectrum of consumer needs , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[20]  J. Gutierrez-Vera.  Mini co-generation schemes in Mexico , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

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

[22]  A. Bonhomme.  A new voltage control system to facilitate the connection of dispersed generation to distribution networks , 2001 .

[23]  C. Marnay,et al.  Shape of the microgrid , 2000, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[24]  M. Etezadi-Amoli,et al.  Electrical performance characteristics of a new micro-turbine generator , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[25]  S. J. Chiang,et al.  Parallel control of the UPS inverters with frequency-dependent droop scheme , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[26]  J. L. Del Monaco.  The role of distributed generation in the critical electric power infrastructure , 2001 .

[27]  The role of distributed generation in the critical electric power infrastructure , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[28]  Kevin Tomsovic,et al.  Intelligent control methods for systems with dispersed generation , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[29]  B. Lasseter,et al.  Microgrids [distributed power generation] , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[30]  P. Bongrain,et al.  Connection of EDF's remote control system to dispersed generation units , 2001 .

[31]  J.A. Momoh.  Mini Cogeneration Schemes in Mexico , 2001, IEEE Power Engineering Review.

[32]  A. Keyhani,et al.  Control of distributed generation systems-Part I: Voltages and currents control , 2004, IEEE Transactions on Power Electronics.

[33]  Vadim I. Utkin,et al.  Sliding mode control , 2004 .