Flexible Voltage Support Control with Imbalance Mitigation Capability for Inverter-Based Distributed Generation Power Plants under Grid Faults

- Journal title : Journal of Power Electronics
- Volume 16, Issue 4, 2016, pp.1551-1564
- Publisher : The Korean Institute of Power Electronics
- DOI : 10.6113/JPE.2016.16.4.1551

Title & Authors

Flexible Voltage Support Control with Imbalance Mitigation Capability for Inverter-Based Distributed Generation Power Plants under Grid Faults

Wang, Yuewu; Yang, Ping; Xu, Zhirong;

Wang, Yuewu; Yang, Ping; Xu, Zhirong;

Abstract

The high penetration level of inverter-based distributed generation (DG) power plants is challenging the low-voltage ride-through requirements, especially under unbalanced voltage sags. Recently, a flexible injection of both positive- (PS) and negative-sequence (NS) reactive currents has been suggested for the next generation of grid codes. This can enhance the ancillary services for voltage support at the point of common coupling (PCC). In light of this, considering distant grid faults that occur in a mainly inductive grid, this paper proposes a complete voltage support control scheme for the interface inverters of medium or high-rated DG power plants. The first contribution is the development of a reactive current reference generator combining PS and NS, with a feature to increase the PS voltage and simultaneously decrease the NS voltage, to mitigate voltage imbalance. The second contribution is the design of a voltage support control loop with two flexible PCC voltage set points, which can ensure continuous operation within the limits required in grid codes. In addition, a current saturation strategy is also considered for deep voltage sags to avoid overcurrent protection. Finally, simulation and experimental results are presented to validate the effectiveness of the proposed control scheme.

Keywords

Distributed generation;Low-voltage ride-through;Positive and negative sequence current control;Voltage sag;Voltage support;

Language

English

Cited by

References

1.

W. Sinsukthavorn, E. Ortjohann, A. Mohd, N. Hamsic, and D. Morton, “Control strategy for three-/four-wire-inverterbased distributed generation,” IEEE Trans. Ind. Electron., Vol. 59, No. 10, pp. 3890-3899, Oct. 2012.

2.

A. Teke and M. B. Latran, “Review of multifunctionalinverter topologies and control schemes used in distributed generation systems,” Journal of Power Electronics, Vol. 14, No. 2, pp. 324-340, Mar. 2014.

3.

Q. Wang, N. Zhou, and L. Ye, “Fault analysis for distribution networks with current-controlled three-phase inverter-interfaced distributed generators,” IEEE Trans. Power Del., Vol. 30, No. 3, pp. 1532-1542, Jun. 2015.

4.

Grid Code-High and Extra High Voltage, E.ON Netz GmbH, Bayreuth, Germany. 2006.

5.

Y. Bae, T.-K. Vu, and R.-Y. Kim, “Implemental control strategy for grid stabilization of grid-connected PV system based on German grid code in symmetrical low-to-medium voltage network,” IEEE Trans. Energy Convers., Vol. 28, No. 3, pp. 619-631, Sep. 2013.

6.

China Electricity Council, GB/T 19964-2012 Technical Requirements for Connecting Photovoltaic Power Station to Power System, Beijing: Standards Press of China (in Chinese). 2012.

7.

A. Camacho, M. Castilla, J. Miret, J. C. Vasquez, and E. Alarcon-Gallo, “Flexible voltage support control for three-phase distributed generation inverters under grid fault,” IEEE Trans. Ind. Electron., Vol. 60, No. 4, pp. 1429-1441, Apr. 2013.

8.

S. Alepuz, S. Busquets-Monge, J. Bordonau, J. A. Martinez-Velasco, C. A. Silva, J. Pontt, and J. Rodriguez, “Control strategies based on symmetrical components for grid-connected converters under voltage dips,” IEEE Trans. Ind. Electron., Vol. 56, No. 6, pp. 2162-2173, Jun. 2009.

9.

F. Wang, J. L. Duarte, and M. A. M. Hendrix, “Pliant active and reactive power control for grid-interactive converters under unbalanced voltage dips,” IEEE Trans. Power Electron., Vol. 26, No. 5, pp. 1511-1521, May 2011.

10.

X. Guo, W. Liu, X. Zhang, X. Sun, Z. Lu, and J. M. Guerrero, “Flexible control strategy for grid-connected inverter under unbalanced grid faults without PLL,” IEEE Trans. Power Electron., Vol. 30, No. 4, pp. 1773-1778, Apr. 2015.

11.

F. A. S. Neves, M. Carrasco, F. Mancilla-David, G. M. S. Azevedo, and V. S. Santos, “Unbalanced grid fault ride-through control for single-stage photovoltaic inverters,” IEEE Trans. Power Electron., Vol. 31, No. 4, pp. 3338-3347, Apr. 2016.

12.

M. Mirhosseini, J. Pou, and V. G. Agelidis, “Single- and two-stage inverter-based grid-connected photovoltaic power plants with ride-through capability under grid faults,” IEEE Trans. Sustain. Energy, Vol. 6, No. 3, pp. 1150-1159, Jul. 2015.

13.

F. Lin, K. Lu, T. Ke, B. Yang, and Y. Chang, “Reactive power control of three-phase grid-connected PV system during grid faults using Takagi-Sugeno-Kang probabilistic fuzzy neural network control,” IEEE Trans. Ind. Electron., Vol. 62, No. 9, pp. 5516-5528, Sep. 2015.

14.

G. Ding, F. Gao, H. Tian, C. Ma, M. Chen, G. He, and Y. Liu, “Adaptive dc-link voltage control of two-stage photovoltaic inverter during low voltage ride-through operation,” IEEE Trans. Power Electron., Vol. 31, No. 6, pp. 4182-4194, Jun. 2016.

15.

J. Miret, A. Camacho, M. Castilla, L. G. de Vicuna, and J. Matas, “Control scheme with voltage support capability for distributed generation inverters under voltage sags,” IEEE Trans. Power Electron., Vol. 28, No. 11, pp. 5252-5262, Nov. 2013.

16.

A. Camacho, M. Castilla, J. Miret, R. Guzman, and A. Borrell, “Reactive power control for distributed generation power plants to comply with voltage limits during grid faults,” IEEE Trans. Power Electron., Vol. 29, No. 11, pp. 6224-6234, Nov. 2014.

17.

J. Miret, A. Camacho, M. Castilla, J. L. García de Vicuña, and J. de la Hoz, “Reactive current injection protocol for low-power rating distributed generation sources under voltage sags,” IET Power Electron., Vol. 8, No. 6, pp. 879-886, 2015.

18.

M. Castilla, J. Miret, A. Camacho, J. Matas, and L. Garcia de Vicuna, “Voltage support control strategies for static synchronous compensators under unbalanced voltage sags,” IEEE Trans. Ind. Electron., Vol. 61, No. 2, pp. 808-820, 2014.

19.

A. Camacho, M. Castilla, J. Miret, A. Borrell, and L. G. de Vicuna, “Active and reactive power strategies with peak current limitation for distributed generation inverters during unbalanced grid faults,” IEEE Trans. Ind. Electron., Vol. 62, No. 3, pp. 1515-1525, Mar. 2015.

20.

J. L. Sosa, M. Castilla, J. Miret, J. Matas, and Y. A. Al-Turki, “Control strategy to maximize the power capability of PV three-phase inverters during voltage sags,” IEEE Trans. Power Electron., Vol. 31, No. 4, pp. 3314-3323, Apr. 2016.

21.

C.-T. Lee, C.-W. Hsu, and P.-T. Cheng, “A low-voltage ride-through technique for grid-connected converters of distributed energy resources,” IEEE Trans. Ind. Appl., Vol. 47, No. 4, pp. 1821-1832, Jul. 2011.

22.

N. Hoffmann and F. W. Fuchs, “Minimal invasive equivalent grid impedance estimation in inductive-resistive power networks using extended Kalman filter,” IEEE Trans. Power Electron., Vol. 29, No. 2, pp. 631-641, 2014.

23.

F. Iov, A. D. Hansen, P. E. Sorensen, and N. A. Cutululis, "Mapping of grid faults and grid codes," Riso National Laboratory, Technical University of Denmark, Roskilde, Denmark, Riso-R-1617(EN), Jul. 2007.

24.

Y. Yang, F. Blaabjerg, and H. Wang, “Low-voltage ride-through of single-phase transformerless photovoltaic inverters,” IEEE Trans. Ind. Appl., Vol. 50, No. 3, pp. 1942-1952, May 2014.

25.

M. H. J. Bollen, “Characterisation of voltage sags experienced by three-phase adjustable-speed drives,” IEEE Trans. Power Deliv., Vol. 12, No. 4, pp. 1666-1671, Oct. 1997.

26.

M. H. J. Bollen, Understanding Power Quality Problems: Voltage Sags and Interruptions. New York: IEEE Press, 2000.

27.

M. H. J. Bollen and L. D. Zhang, “Different methods for classification of three-phase unbalanced voltage dips due to faults,” Electr. Power Syst. Res., Vol. 66, No. 1, pp. 59-69, Jul. 2003.

28.

C.-Y. Lee, “Effects of unbalanced voltage on the operation performance of a three-phase induction motor,” IEEE Trans. Energy Convers., Vol. 14, No. 2, pp. 202-208, Jun. 1999.

29.

A. von Jouanne and B. Banerjee, “Assessment of voltage unbalance,” IEEE Trans. Power Deliv., Vol. 16, No. 4, pp. 782-790, Oct. 2001.

30.

T.-L. Lee, S.-H. Hu, and Y.-H. Chan, “D-STATCOM with positive-sequence admittance and negative-sequence conductance to mitigate voltage fluctuations in high-level penetration of distributed-generation systems,” IEEE Trans. Ind. Electron., Vol. 60, No. 4, pp. 1417-1428, Apr. 2013.

31.

M. Schweizer and J. W. Kolar, “Design and implementation of a highly efficient three-level T-type converter for low-voltage applications,” IEEE Trans. Power Electron., Vol. 28, No. 2, pp. 899-907, Feb. 2013.

32.

L. Zhang, K. Sun, and Y. Fang, "An optimized common mode voltage reduction PWM strategy for T-type three phase three level photovoltaic grid-tied inverter," in 2013 IEEE Energy Conversion Congress and Exposition (ECCE), pp. 1623-1627, 2003.

33.

P. Rodriguez, J. Pou, J. Bergas, J. . Candela, R. P. Burgos, and D. Boroyevich, “Decoupled double synchronous reference frame PLL for power converters control,” IEEE Trans. Power Electron., Vol. 22, No. 2, pp. 584-592, Mar. 2007.

34.

H.-S. Song and K. Nam, “Dual current control scheme for PWM converter under unbalanced input voltage conditions,” IEEE Trans. Ind. Electron., Vol. 46, No. 5, pp. 953-959, Oct. 1999.

35.

A. G. Yepes, A. Vidal, O. Lopez, and J. Doval-Gandoy, “Evaluation of techniques for cross-coupling decoupling between orthogonal axes in double synchronous reference frame current control,” IEEE Trans. Ind. Electron., Vol. 61, No. 7, pp. 3527-3531, Jul. 2014.

36.

M. Liserre, F. Blaabjerg, and S. Hansen, “Design and control of an LCL-filter-based three-phase active rectifier,” IEEE Trans. Ind. Appl., Vol. 41, No. 5, pp. 1281-1291, Oct. 2005.

37.

V. Ignatova, P. Granjon, and S. Bacha, “Space vector method for voltage dips and swells analysis,” IEEE Trans. Power Deliv., Vol. 24, No. 4, pp. 2054–2061, Oct. 2009.

38.

R. Teodorescu, M. Liserre, and P. Rodr Guez, Grid Converters for Photovoltaic and Wind Power Systems. Chichester, UK: John Wiley & Sons, Ltd, 2011.