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Voltage Rise Mitigation and Test Using the Reactive Power Compensator in LV Distribution Networks
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The high penetration level of the generated photovoltaic (PV) power generation in low voltage (LV) networks induces the issue of voltage rise, particularly at the end of the feeders. Several solutions such as grid reinforcement, transformer tap change, demand-side management, active power curtailment, and the use of reactive power control methods have been proposed to address this issue. However, the practicability of these solutions is limited owing to high costs, low efficiencies and the conflicts of interest between network operator and the owners of solar farms. This paper proposed the use of a reactive power compensator (RPC) to mitigate the dual issues of voltage rise and voltage drop. The voltage rise is caused by the distributed generation systems while the voltage drop is caused by the heavy loads at the end of the feeder of the weak LV distribution networks. The RPC was utilized to inject the lagging or leading reactive current during the voltage drop or voltage rise condition. The proposed RPC was developed as a part of the Kepco Open R&D project. The aim of this project is to investigate the techniques to mitigate the issues for the voltage rise and drop in the distribution networks, without either changing the service transformer tap or installing an additional distribution line and service transformer. The performance of the proposed RPC was verified via simulation and experiments.
Abstract
The high penetration level of the generated photovoltaic (PV) power generation in low voltage (LV) networks induces the issue of voltage rise, particularly at the end of the feeders. Several solutions such as grid reinforcement, transformer tap change, demand-side management, active power curtailment, and the use of reactive power control methods have been proposed to address this issue. However, the practicability of these solutions is limited owing to high costs, low efficiencies and the conflicts of interest between network operator and the owners of solar farms. This paper proposed the use of a reactive power compensator (RPC) to mitigate the dual issues of voltage rise and voltage drop. The voltage rise is caused by the distributed generation systems while the voltage drop is caused by the heavy loads at the end of the feeder of the weak LV distribution networks. The RPC was utilized to inject the lagging or leading reactive current during the voltage drop or voltage rise condition. The proposed RPC was developed as a part of the Kepco Open R&D project. The aim of this project is to investigate the techniques to mitigate the issues for the voltage rise and drop in the distribution networks, without either changing the service transformer tap or installing an additional distribution line and service transformer. The performance of the proposed RPC was verified via simulation and experiments.
참고문헌 (15)
- Yoon, J., "Evaluation of Influence of System on SVC Installation Operation", Proceedings of the Korean Institute of Electrical Engineers, 59(7), pp.1187~1193 (2010)
- 이승민, "제주계통의 무효전력보상을 위한 SVC와 STATCOM의 운전특성 비교", 한국태양에너지학회 논문집, 35(3), pp.49~56 (2015), 한국태양에너지학회
- Kumar, C., "Operation and Control of an Improved Performance Interactive DSTATCOM", IEEE Transactions on Industrial Electronics, 62(10), pp.6024~6034 (2015)
- Cetin, A., "VSC-Based D-STATCOM with Selective Harmonic Elimination", IEEE Transactions on Industry Applications, 45(3) (2009)
- Ota, J. I. Y., "A Phase-Shifted-PWM D-STATCOM using a Modular Multilevel Cascade Converter (SSBC)—Part I: Modeling, Analysis, and Design of Current Control", IEEE Transactions on Industry Applications, 51(1) (2015)
- Majumder, R., "Reactive Power Compensation in Single-Phase Operation of Microgrid", IEEE Trans. Ind. Electron, 60(4), pp.1403~1416 (2013)
- Wang, Q., "A Simple Active and Reactive Power Control for Applications of Single-phase Electric Springs", IEEE Transactions on Industrial Electronics, 65(8) (2018)
- Kim, H. S., "Distributed Adaptive Virtual Impedance Control for Accurate Reactive Power Sharing Based on Consensus Control in Microgrids", IEEE Transactions on Smart Grid, 8(4) (2017)
- Juamperiz, M., "Voltage Regulation in LV Grids by Coordinated Volt-Var Control Strategies", J. Mod. Power Syst. Clean Energy Sept (2014)
- Tonkoski, R., "Coordinated Active Power Curtailment of Grid Connected PV Inverters for Overvoltage Prevention", IEEE Trans. Sustain. Energy, 2(2), pp.139~147 (2011)
- Liu, Y., "Distribution System Voltage Performance Analysis for High-Penetration", IEEE Energy 2030 (2008)
- Zeraati, M., "Voltage Quality Improvement in Low Voltage Networks Using Reactive Power Capability of Single-Phase PV Inverters", IEEE Trans. on Smart Grid, 10(5), pp.5057~5065 (2019)
- Kim, Y. R., "Voltage Control of Distribution Networks by Reactive Power Compensator", KIEE Conference, pp.650~651 (2020)
- Safayet, A., "Reactive Power Management for Overvoltage Prevention at High PVpenetration in a Low-Voltage Distribution System", IEEE Trans. Ind. Appl, 53(6), pp.5786~5794 (2017)
- Sim, W. S., "Reactive Power Control of Single Phase Rective Power Compensator for Distribution Line", The Trans. of the KIPE, 25(2), pp.73~78 (2020)