Universal active and reactive power control of electronically interfaced distributed generation sources in virtual power plants operating in grid-connected and islanding modes

Universal active and reactive power control of electronically interfaced distributed generation sources in virtual power plants operating in grid-connected and islanding modes

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The control paradigms of the distributed generation (DG) sources in the smart grid are realised by either utilising virtual power plant (VPP) or by employing MicroGrid structures. Both VPP and MicroGrid are presented with the problem of control of power flow between their comprising DG sources. This study depicts this issue for VPP and proposes a novel and improved universal active and reactive power flow controllers for three-phase pulse width modulated voltage source inverters (PWM-VSI) operating in the VPP environment. The proposed controller takes into account all cases of RX relationship, thus allowing it to function in systems operating at high, medium (MV) and low-voltage (LV) levels. Also proposed control scheme for the first time in an inverter control takes into account the capacitance of the transmission line which is an important factor to accurately represent medium length transmission lines. This allows the proposed control scheme to be applied in VPP structures, where DG sources can operate at MV LV levels over a short/medium length transmission line. The authors also conducted small signal stability analysis of the proposed controller and compared it against the small signal study of the existing controllers.


    1. 1)
      • 1. Kothari, D.P., Nagrath, I.J.: ‘Power system engineering’ (McGraw-Hill, 2008, 2nd edn.).
    2. 2)
      • 2. Khan, H.A., Xu, Z., Iu, H., Sreeram, V.: ‘Review of technology and implementation strategies in the area of smart grid’. Australasian Universities Power Engineering Conf., 2009, pp. 16.
    3. 3)
      • 3. Pepermans, G., Driesen, J., Haeseldonckx, D., Belmans, R., D'haeseleer, W.: ‘Distributed generation: Definition, benefits and issues’, Energy Policy, 2005, 3, pp. 787798 (doi: 10.1016/j.enpol.2003.10.004).
    4. 4)
      • 4. Mashhour, E., Moghaddas-Tafreshi, S.M.: ‘A Review on operation of MicroGrids and virtual power plants in the energy market’. Adaptive Science and Technology Conf., 2009, pp. 273277.
    5. 5)
      • 5. Awad, B., Wu, J., Jenkins, N.: ‘Control of distributed generation’, E I Elektrotech., 2008, 125, pp. 409414 (doi: 10.1007/s00502-008-0591-3).
    6. 6)
      • 6. Bignucolo, F., Caldon, R., Prandoni, V., Spelta, S., Vezzola, M.: ‘Control on MV distributed networks with aggregated DG units (VPP)’. Universities Power Engineering Conf., 2006, pp. 187192.
    7. 7)
      • 7. El Bakari, K., Myrzik, J.M.A., Kling, W.L.: ‘Prospects of a virtual power plant to control a cluster of distributed generation and renewable energy sources’. Universities Power Engineering Conf., 2009, pp. 15.
    8. 8)
      • 8. Fenix, , The Fenix Project: ‘Integration of renewables and distributed generation in networks through aggregation’, available at, assessed 15th March 2012.
    9. 9)
      • 9. Grainger, J., Stevenson, D.: ‘Power system analysis, international edition’ (McGraw-Hill, 1994).
    10. 10)
      • 10. Seo, J., Lee, H., Jung, W., Won, D.: ‘Voltage control method using modified voltage droop control in LV distribution system’. IEEE Transmission and Distribution Conf., 2009, pp. 14.
    11. 11)
      • 11. Ten, C.F., Crossley, P.A.: ‘Control of multiple distributed generators for intentional islanding’. SmartGrids for Distribution IET-CIRED Conf., 2008, pp. 14.
    12. 12)
      • 12. Barsali, S., Ceraolo, M., Pelacchi, P., Poli, D.: ‘Control techniques of dispersed generators to improve the continuity of electricity supply’. IEEE Power Engineering Society Conf., 2002, pp. 789794.
    13. 13)
      • 13. Boldea, I.: ‘The electric generators handbook: Synchronous generators Vol 1’ (CRC Press, 2006, 1st edn.).
    14. 14)
      • 14. Engler, A., Soultanis, N.: ‘Droop control in LV-grids’. Future Power Systems Conf., 2005, pp. 16.
    15. 15)
      • 15. De Brabandere, K., Bolsens, B., Van den Keybus, J., Woyte, A., Driesen, J., Belmans, R.: ‘A voltage and frequency droop control method for parallel inverters’, IEEE Trans. Power Electron., 2007, 22, pp. 11071115 (doi: 10.1109/TPEL.2007.900456).
    16. 16)
      • 16. Li, Y., Li, Y.W.: ‘Decoupled power control for an inverter based low voltage MicroGrid in autonomous operation’. IEEE Power Electronics and Motion Control Conf., 2009, pp. 24902496.
    17. 17)
      • 17. Vasquez, J.C., Guerrero, J.M., Luna, A., Rodriguez, P., Teodorescu, R.: ‘Adaptive droop control applied to voltage-source inverters operating in grid-connected and islanded modes’, IEEE Trans. Ind. Electron., 2009, 22, pp. 40884096 (doi: 10.1109/TIE.2009.2027921).
    18. 18)
      • 18. Coelho, E.A.A., Cortizo, P.C., Garcia, P.F.D.: ‘Small signal stability for single phase inverter connected to stiff AC system’. 34th IAS Annual Meeting of Industry Applications Conf., 1999, vol. 4, pp. 21802187.
    19. 19)
      • 19. Chen, J.-F., Chu, C.-L.: ‘Combination voltage-controlled and current-controlled PWM inverters for UPS parallel operation’, IEEE Trans. Power Electron., 1995, 10, pp. 547558 (doi: 10.1109/63.406842).
    20. 20)
      • 20. Luyben, W.L.: ‘Tuning proportional–integral-derivative controllers for integrator/deadtime processes’, Ind. Eng. Chem. Res., 1996, 35, pp. 34803483 (doi: 10.1021/ie9600699).

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