Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

access icon free Quantitative index to evaluate the impact of reactive power compensators on AC system's strength of UHVDC transmission under hierarchical infeed mode

© The Institution of Engineering and Technology
Received 01/07/2019, Accepted 26/11/2019, Revised 16/10/2019, Published 28/11/2019

Ultra high voltage direct current (UHVDC) transmission under hierarchical infeed mode (HIM) embedded into AC networks with diverse voltage levels (500 and 1000 kV) has been used by energy utilities for bulk power transfer. It has some dynamic characteristics challenges such as commutation failures under certain faults at inverter station. The installation of reactive power compensators (RPCs) such as synchronous condenser and static synchronous compensator at inverter's end can support the AC grid to mitigate commutation failures, which can ultimately result in the improved dynamic characteristics of UHVDC-HIM system. There is a need for analytical index that can accurately indicate the AC system's strength of UHVDC-HIM system with consideration of impact from RPCs and the interaction between AC networks. In this study, the resulting improvement in dynamic characteristics is quantified by proposed ‘equivalent hierarchical mode short circuit ratio’ (EHMSCR) index. An equivalent model of UHVDC-HIM system with AC system's strength modified via EHMSCR is established in PSCAD/EMTDC in order to assess the application of proposed index. Then, three different cases are carried out to further validate the accuracy of EHMSCR index. The results indicate that EHMSCR can accurately evaluate the AC system's strength of UHVDC-HIM system with RPCs.

Inspec keywords: invertors; static VAr compensators; busbars; reactive power; HVDC power transmission

Other keywords: AC busbar voltages; low-end converter; UHVDC transmission; AC system; voltage 1000.0 kV; reactive power compensators; ultra high voltage direct current transmission system; improved dynamic characteristics; UHVDC-HIM system; equivalent hierarchical mode short circuit ratio index; special dynamic characteristics challenges; AC networks; hierarchical infeed mode; static synchronous compensator; voltage 500.0 kV; AC grid system

Subjects: d.c. transmission; Power convertors and power supplies to apparatus; Control of electric power systems; Power system control

References

    1. 1)
      • 17. Liu, Z., Qin, X., Zhao, L., et al: ‘Study on the application of UHVDC hierarchical connection mode to multi-infeed HVDC system’, Proc. CSEE, 2013, 33, (10), pp. 1–7.
    2. 2)
      • 9. Rehman, A. U., Guo, C., Zhao, C.: ‘Impact of synchronous condenser on commutation failure of LCC-UHVDC transmission system hierarchically connected to weak AC grid’. 2018 2nd IEEE Conf. Energy Internet and Energy Syst. Integration (EI2), Beijing, People's Republic of China, 20–22 October 2018, pp. 1–6.
    3. 3)
      • 4. Zhuang, Y., Menzies, R.W., Nayak, O.B., et al: ‘Dynamic performance of a STATCON at an HVDC inverter feeding a very weak AC system’, IEEE Trans. Power Deliv., 1996, 11, (2), pp. 958–964.
    4. 4)
      • 3. Nayak, O. B., Gole, A. M., Chapman, D. G., et al: ‘Dynamic performance of static and synchronous compensators at an HVDC inverter bus in a very weak AC system’, IEEE Trans. Power Syst., 1994, 9, (3), pp. 1350–1358.
    5. 5)
      • 15. Liao, S., Yao, W., Ai, X., et al: ‘An improved multi-infeed effective short-circuit ratio for AC/DC power systems with massive shunt capacitors installed’, Energies, 2017, 10, (3), pp. 1–16.
    6. 6)
      • 5. Zhang, Y., Gole, A.M.: ‘Comparison of the transient performance of STATCOM and synchronous condenser at HVDC converter stations’. 11th IET Int. Conf. AC and DC Power Trans., Birmingham, UK, 10–12 February 2015, pp. 1–8.
    7. 7)
      • 14. Zhang, Y.: ‘Investigation of reactive power control and compensation for HVDC system’. PhD Thesis, University of Manitoba, Winnipeg, MB, Canada, 2011.
    8. 8)
      • 12. CIGRÉ Working Group B4.41: ‘Systems with multiple DC infeed’. Technical Brochure no. 364, 2008.
    9. 9)
      • 7. CIGRE Working Group 14.07, IEEE Working Group 15.05.05: ‘Guide for planning DC links terminating at AC system locations having low short-circuit capacities, part II: planning guidelines’, 1997, p. 115.
    10. 10)
      • 2. Rehman, A.U., Guo, C., Zhao, C.: ‘Coordinated control for operating characteristics improvement of UHVDC transmission systems under hierarchical connection scheme with STATCOM’, Energies, 2019, 12, (5), p. 945.
    11. 11)
      • 18. Schauder, C., Mehta, H.: ‘Vector analysis and control of advanced static VAr compensators’, IEE Proc. C-Gener. Transm. Distrib., 1993, 140, (4), pp. 299–306.
    12. 12)
      • 11. de Toledo, P. F., Bergdahl, B., Apslund, G.: ‘Multiple infeed short-circuit ratio – aspects related to multiple HVDC into one AC network’. IEEE/Power Energy Soc. Transm. Distrib. Conf. Exhibit.: Asia and Pacific, Dalian, People's Republic of China, 2005.
    13. 13)
      • 10. Rehman, A.U., Guo, C., Zhao, C., et al: ‘Comparative performance study of dynamic reactive power compensators on operating characteristics of LCC based UHVDC system under hierarchical connection mode’, J. Electr. Eng. Technol., 2019, 14, (2), pp. 535–547.
    14. 14)
      • 13. Guo, C., Zhang, Y., Gole, A.M., et al: ‘Analysis of dual-infeed HVDC with LCC-HVDC and VSC-HVDC’, IEEE Trans. Power Deliv., 2012, 27, (3), pp. 1529–1537.
    15. 15)
      • 6. CIGRE Working Group 14.07, IEEE Working Group 15.05.05: ‘Guide for planning DC links terminating at AC system locations having low short-circuit capacities, part I: AC/DC interaction phenomenon’, 1997, p. 68.
    16. 16)
      • 1. Tang, Y., Li, F., Wang, Q., et al: ‘Power stability analysis of UHVDC systems hierarchically connected to AC systems’, Electr. Power Syst. Res., 2017, 163, (Part B), pp. 715–724.
    17. 17)
      • 16. Ni, X., Gole, A.M., Zhao, C., et al: ‘An improved measure of AC system strength for performance analysis of multi-infeed HVdc systems including VSC and LCC converters’, IEEE Trans. Power Deliv., 2018, 33, (1), pp. 169–178.
    18. 18)
      • 8. Sha, J., Guo, C., Rehman, A.U., et al: ‘A quantitative index to evaluate the commutation failure probability of LCC-HVDC with a synchronous condenser’, Appl. Sci., 2019, 9, (5), p. 925.
    19. 19)
      • 19. Rahimi, E., Gole, A.M., Davies, J.B., et al: ‘Commutation failure analysis in multi-infeed HVDC systems’, IEEE Trans. Power Deliv., 2011, 26, (1), pp. 378–384.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-gtd.2019.1013
Loading

Related content

content/journals/10.1049/iet-gtd.2019.1013
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
Print this page
This is a required field
Please enter a valid email address