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배전계통에서 분산 기반 분산형전원의 실시간 전압 및 무효전력제어 방안

Decentralized Real-time Volt/Var Control of Distributed Generation in Distribution System

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주제분류기타공학

초록

Renewable energy resource policies are being promoted to solve global resource depletion and environmental problems. Accordingly, as the connection between renewable energy resources and the distribution system has increased, various problems such as degradation in the quality of the power produced and voltage fluctuations have occurred. In this study, to solve the voltage problem, we propose a decentralized real-time volt/var control of the distributed generations (DGs) in a distribution system. The proposed control scheme aims to maintain the voltage for a point of common coupling (PCC) within a specified range, and the proposed control is applied in two stages. The proposed control scheme compensates for the disadvantages of a conventional control scheme and shows a new control structure. The proposed control scheme was applied to the test distribution system using MATLAB and was verified to be more effective than the conventional control scheme.

Abstract

Renewable energy resource policies are being promoted to solve global resource depletion and environmental problems. Accordingly, as the connection between renewable energy resources and the distribution system has increased, various problems such as degradation in the quality of the power produced and voltage fluctuations have occurred. In this study, to solve the voltage problem, we propose a decentralized real-time volt/var control of the distributed generations (DGs) in a distribution system. The proposed control scheme aims to maintain the voltage for a point of common coupling (PCC) within a specified range, and the proposed control is applied in two stages. The proposed control scheme compensates for the disadvantages of a conventional control scheme and shows a new control structure. The proposed control scheme was applied to the test distribution system using MATLAB and was verified to be more effective than the conventional control scheme.

참고문헌 (14)

  1. Renewable Energy 3020 Implementaion Plan, "Ministry of Trade, Industry, and Energy", Ministry of Trade, Industry and Energy, ~ (2017)
  2. No, D. S., "Operation Plan for Bidirectional Protection and Cooperation of Smart Grid connected with New Energy Power Source", The Korean Institute of Electrical Engineers, 5(9), pp.39~34 (2010)
  3. Comfort, R., "Power Quality Impact of Distributed Generation: Effect on Steady State Voltage Regulation", PQA 2001 North America Conference (2001)
  4. Choi, J-H., "The Online Voltage Control of ULTC Transformer for Distribution Voltage Regulation", International Journal of Electrical Power &Energy Systems, 23(2), pp.91~98 (2001)
  5. Liu, X., "Coordinated Control of Distributed Energy Storage System with Tap Changer Transformers for Voltage Rise Mitigation under High Photovoltaic Penetration", IEEE Transactions on Smart Grid, 3(2), pp.897~906 (2012)
  6. Technical Standards for Connecting Distribution Systems to Distributed Power, "Distribution Planning Department of KEPCO", Korea Electric Power Corporation, ~ (2021)
  7. "IEEE 1547, IEEE Standard for Interconnecting Distributed Resources with Electric Power Systems", The IEEE Standard Association, ~ (2003)
  8. Toma, S., "Decentralized Voltage Control in Distribution System Using Neural Network", 2008 IEEE 2nd International Power and Energy Conference (2008), IEEE
  9. Go, S. I., "Voltage and Reactive Power Optimization Using a Simplified Linear Equations at Distribution Networks with DG", Energies, 13(13), pp.3334~ (2020)
  10. Barr, J., "Integration of Distributed Generation in the Volt", var Management System for Active Distribution Networks, 2014, pp.6(2), 576~586
  11. Park, D. H., "The status of the Expansion of the Linkage period of the Distributed Power in Distribution System", Journal of Electrical World Monthly Magazine, pp.26~31 (2015), Korea Electric Association
  12. Ahn, S. J., "Development of DG Reactive Power Controller for Distribution System Voltage Control", Installation Engineers Proceedings of KIIEE Annual Conference, pp.319~320 (2014), The Korean Institute of Illuminating and Electrical Engineers
  13. Analysis of Power usage Patterns using Consumer Load Curves, "Korea Energy Management Corporation", Korea Energy Management Corporation, ~ (2005)
  14. An, H. S., "Improvement of Connection Method between Distributed Energy Source and 22.9kV Distribution Line", Proceedings of the KIEE Conference, pp.263~265 (2015), The Korean Institute of Electrical Engineers

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