Journal of Electrical Engineering & Technology

, Volume 14, Issue 6, pp 2239–2250 | Cite as

Advanced Frequency Support Strategy of Double-Stage Grid-Connected PV Generation

  • Mingshuang Sun
  • Qi JiaEmail author
  • Zheyi Pei
  • Cun Dong
  • Zhenhao Wang
  • Xin Jin
Original Article


With an increasing penetration of PV generation in the electrical grid, the increasing replacement of large conventional synchronous generators by PV generation will result in deteriorated frequency regulation performance due to the reduced system inertia response. It is urgent for PV generation to take part in frequency regulation. In this paper, three virtual inertial control strategies are proposed for double-stage grid-connected PV generation: virtual inertial control based on the dynamics of phase-locked loop (PLL), virtual inertial control based on the dynamics of low voltage DC capacitor, virtual inertial control based on the dynamics of high voltage DC capacitor. The influence of control parameters on virtual inertial control strategies is also analyzed. Besides, in order to get an even better frequency behavior, a coordinated control strategy between PV generation and conventional synchronous generators (SGs) is also proposed. Finally, the theoretical analysis and control strategies are verified by simulation results.


Photovoltaic generation Frequency regulation Virtual inertial control strategy Coordinated control strategy 



This work is supported by Research Program of State Grid Corporation of China (Study on active frequency and voltage control technologies for second level power disturbance in photovoltaic power plant, Research and Application of Distributed PV Power Generation Wide-area Monitoring Analysis and Global Force Estimation).


  1. 1.
    Pedro GB, Jesus CH, Francisco JR (2016) Stability assessment for transmission systems with large utility-scale photovoltaic units. IET Renew Power Gener 10(5):584–597CrossRefGoogle Scholar
  2. 2.
    Guoping C, Mingjie L, Tao X et al (2017) Practice and challenge of renewable energy development based on interconnected power grids. Power Syst Technol 41(10):3095–3103Google Scholar
  3. 3.
    ENTSO-E AISBL (2013) Network code for requirements for grid connection applicable to all generators (Brussels Belgium)Google Scholar
  4. 4.
    Hydro Quebec TransÉnergie (2009) Transmission provider technical requirements for the connection of power plants to the hydro-Québec transmission system (Hydro Quebec TransÉnergie, Montréal, QC, Canada)Google Scholar
  5. 5.
    Xiaoqiang S, Xin L, Song C et al (2017) Actual measurement and analysis of fast frequency response capability of PV-inverters in Northwest power grid. Power Syst Technol 41(10):2792–2798Google Scholar
  6. 6.
    Xiaoqiang S, Song C, Xin L et al (2018) Test method for frequency characteristics of Northwest sending-end power grid. Autom Electric Power Syst 42:2Google Scholar
  7. 7.
    Yu G, Yang W, Zhi L et al (2018) Photovoltaic virtual synchronous generator engineering application effects analysis and optimization. Autom Electric Power Syst 42(9):1–8Google Scholar
  8. 8.
    Amirnaser Y, Anna RDF, Hamidreza G et al (2011) Modeling guidelines and a benchmark for power system simulation studies of three-phase single-stage photovoltaic systems. IEEE Trans Power Del 26(2):1247–1264CrossRefGoogle Scholar
  9. 9.
    Jesus CH, Pedro GB, Francisco S (2017) Enhanced utility-scale photovoltaic units with frequency support functions and dynamic grid support for transmission systems. IET Renew Power Gener 11(3):361–372CrossRefGoogle Scholar
  10. 10.
    Kakimoto N, Takayama S, Satoh H (2009) Power modulation of photovoltaic generator for frequency control of power system. IEEE Trans Energy Convers 24(4):943–994CrossRefGoogle Scholar
  11. 11.
    Huanhai X, Yun L, Zhen W et al (2013) A new frequency regulation strategy for photovoltaic systems without energy storage. IEEE Trans Sustain Energy 4(4):985–993CrossRefGoogle Scholar
  12. 12.
    Yu G, Yang W, Zhi L et al (2018) Photovoltaic virtual synchronous generator engineering application effects analysis and optimization. Autom Electric Power Syst 42(9):1–8Google Scholar
  13. 13.
    Jun G, Hui L, Hao J et al (2018) Analysis and investigation on grid-connected operation adaptability of virtual synchronous generators. Autom Electric Power Syst 42(9):26–35Google Scholar
  14. 14.
    Zhipeng L, Wanxing S, Haitao L et al (2017) Application and challenge of virtual synchronous machine technology in power system. Proc CSEE 37(2):349–359Google Scholar
  15. 15.
    Zhenxiong W, Hao Y, Fang Z et al (2017) A hardware structure of virtual synchronous generator in photovoltaic microgrid and its dynamic performance analysis. Proc CSEE 37(2):444–453Google Scholar
  16. 16.
    Ariya S, Yongheng Y, Frede B et al (2017) Delta power control strategy for multistring grid-connected PV inverters. IEEE Trans Ind Appl 53(4):3862–3870CrossRefGoogle Scholar
  17. 17.
    Jones L, Brown D (2015) Real-time photovoltaic plant maximum power point estimation for use in grid frequency stabilizition. In: 16th Workshop control model for power electron, Vancouver, BC, Canada, pp 1–7Google Scholar
  18. 18.
    Cracium B, Kerekes T, Sera D et al (2014) Frequency support functions in large PV power plants with active power reserves. IEEE J Emerg Sel Top Power Electron 2(4):849–858CrossRefGoogle Scholar
  19. 19.
    Lyu X, Xu Z, Zhao J et al (2018) Advanced frequency support strategy of photovoltaic system considering changing working conditions. IET Gener Transm Distrib 12(2):363–370CrossRefGoogle Scholar
  20. 20.
    Sotirios IN, Apostolos GP, Stavros AP (2015) A generic model of two-stage grid-connected PV systems with primary frequency response and inertia emulation. Electric Power Syst Res 127:186–196CrossRefGoogle Scholar

Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  • Mingshuang Sun
    • 1
  • Qi Jia
    • 1
    Email author
  • Zheyi Pei
    • 2
  • Cun Dong
    • 2
  • Zhenhao Wang
    • 1
  • Xin Jin
    • 3
  1. 1.School of Eletrical EngineeringNortheast Electric Power UniverityJilinChina
  2. 2.National Electric Power Dispatching and Communication CenterBeijingChina
  3. 3.Power Dispatching Control Center of State Grid, Jiangsu Electric Power Co., LtdNanjingChina

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