Abstract
Preparations for grid integration of large-scale renewable energy sources, such as wind and solar farms, are being made worldwide. These sources require 154 kV transmission networks. However, such integration faces many practical difficulties, such as the economic viability of constructing transmission and distribution facilities against the potential revenue of the renewable energy and construction delays due to public complaints. Thus, the Korea Electric Power Corporation (KEPCO) introduced a 70 kV transmission voltage, an intermediate voltage between 22.9 and 154 kV, in August 2017. The 70 kV transmission and distribution equipment plan was included in the 10th Long-Term Transmission and Substation Facility Plan announced in April 2023 and is scheduled for full-scale implementation in October 2024. Voltage operation standards similar to those for existing transmission voltages of ≥ 154 kV are necessary for stable operation at 70 kV. Currently, voltage regulation targets and voltage maintenance standards are specified for 154, 345, and 765 kV in Articles 5 and 6 of the “Standard for maintaining reliability and electrical quality of power system.” Therefore, this study developed an analysis method and established voltage operation standards (drafts) for 70 kV through simulations under various conditions. The developed 70 kV voltage operation standards were presented to the Power System Reliability Council to be reflected in the Power System Reliability Notice. On April 25, 2023, these standards were included in Notice No. 2023-65 of the Ministry of Trade, Industry, and Energy, or the “Power System Reliability and Electrical Quality Maintenance Standards” for 70 kV voltage operation.
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References
10th basic plan for long-term electricity supply and demand, 2023.1
Plan for the introduction of 70-kV new transmission voltage, KEPCO, 2017.11
8th long-term transmission and substation facility plan, KEPCO, 2018.7
10th long-term transmission and substation facility plan, KEPCO, 2023.5
Power system reliability and electrical quality maintenance standards (2023–65) p 2023.4. MOTIE
International standard 60038, IEC, 2009.06
American national standard C84.1 (2011) American national standards institute
Natural Environment Research Council. Standards EOP-006-2 and EOP-005-2, NERC
Taylor CW (1992) Power system voltage stability. McGraw-Hill, New York
Van Cutsem T, Vournas C (1998) Voltage stability of electric power systems. Springer, Berlin
Power system reliability and electrical quality maintenance standards (2019), vol. 176, p 2019.11. MOTIE
Almeida AB, De Lorenci EV, Leme RC, Souza ACZ, Lopes BIL, Lo K (2013) Probabilistic voltage stability assessment considering renewable sources with the help of the PV and Q–V curves. IET Renew Power Gener 7(5):521–530
Cutsem T, Vournas C (2008) Voltage stability of electric power systems. Springer, New York, pp 38–41
Guimarães P, Fernandez U, Ocariz T, Mohn FW, de Souza ACZ (2011) Q–V and PV curves as a planning tool of analysis 4th international conference on electric utility deregulation and restructuring and power technologies (DRPT), Weihai, Shandong, pp. 1601–1606
Natural Environment Research Council (2016) Reliability guideline reactive power planning
Optimal power flow: solution techniques, requirements, and challenges (1996) IEEE Publications tutorial course
WECC wind power plant power flow modeling guide (2008) WECC
Generic photovoltaic system models for WECC—a status report (2015) WECC
Honrubia-Escribano A, Gómez-Lázaro E, Fortmann J, Sørensen P, Martin-Martinez S (2018) Generic dynamic wind turbine models for power system stability analysis: a comprehensive review. Renew Sustain Energy Rev 81(2):1939–1952
Goksu O, Sørensen P, Morales A, Weigel S, Fortmann J, Pourbeik P (2016) In: Betancourt U, Ackermann T (eds). Compatability of IEC. Proceedings of the 15th wind integration workshop (61400-27-1 edn.) 1 and WECC 2nd generation wind turbine models
WECC REMTF (2014) WECC wind plant dynamic modeling guidelines. Tech Rep WECC
WECC REMTF (2011) WECC guide for representation of photovoltaic systems in large-scale load flow simulations. Tech Rep WECC
WECC REMTF (2014) WECC solar plant dynamic modeling guidelines. Tech Rep WECC
Natural Environment Research Council (2017) Reliability guideline distributed energy resource modeling
Pourbeik P (2017) Proposal for DER_A model, WECC renewable energy task force memo. Rev., 3(Mar)
Power electronics (2015) PSSE PV inverter and power plant controller models based on GEPV models
Acknowledgements
This work was researched with support by the National Research Foundation of Korea(NRF) grant funded by the Korea government.(MIST) (No. 2021R1F1A1063235) And this research was supported by Korea Electric Power Corporation.(Grant number : R21XO01-31)
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Ko, BK., Nam, SC., Song, H. et al. Establishing Voltage Operation Standards for 70 kV Transmission Voltage. J. Electr. Eng. Technol. 19, 931–945 (2024). https://doi.org/10.1007/s42835-024-01816-9
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DOI: https://doi.org/10.1007/s42835-024-01816-9