Influence of phasor adjustment of harmonic sources on the allowable penetration level of distributed generation |
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| Affiliation: | 1. Department of Electrical and Electronics Engineering, Ege University, 35100 Bornova, Izmir, Turkey;2. Department of Electrical and Electronics Engineering, Dokuz Eylul University, 35160 Buca, Izmir, Turkey;1. Electrical Engineering Department (EDD), Amirkabir University of Technology (AUT), Tehran, Iran;2. Imam Khomeini International University, Qazvin, Iran;1. Companhia Energética de Pernambuco – CELPE, Av. João de Barros 111, Boa Vista, Recife-PE 50.050-902, Brazil;2. Universidade Federal de Pernambuco, Cx. Postal 7462, Recife-PE 50.630-970, Brazil;1. Belize Electricity Limited, Belize;2. Faculty of Mechanical and Electrical Engineering, Autonomous University of Nuevo Leon, Nuevo Leon, Mexico;3. Institute of Engineering, National Autonomous University of Mexico, Mexico City, Mexico;1. State Key Laboratory of Equipment and System Safety of Power Transmission and Distribution & New Technology, College of Electrical Engineering, Chongqing University, Chongqing 400044, China;2. School of Electrical and Information Engineering, The University of Sydney, Sydney 2006, Australia;3. School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China;4. State Grid Electric Power Research Institute (SGEPRI), Nanjing 210003, China;5. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong;1. Instituto Superior Técnico, University of Lisbon, Lisbon, Portugal;2. INESC-ID/IST, University of Lisbon, Lisbon, Portugal;3. EstSetúbal, Polythecnics of Setúbal, Setúbal, Portugal |
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| Abstract: | Harmonic distortion caused by increasing size of inverter-based distributed generation (DG) can give rise to power quality problems in distribution power networks. Therefore, it is very important to determine allowable DG penetration level by considering the harmonic related problems. In this study, an optimization methodology is proposed for maximizing the penetration level of DG while minimizing harmonic distortions considering different load profiles. The methodology is based on updating the voltage magnitude and angle at point of common coupling depending on the size of DG to be utilized in the harmonic power flow modeling. The harmonic parameters are determined by using decoupled harmonic power flow method, in which the harmonic source modeling with harmonic current spectrum angle adjustment is embedded, while the nonlinear loads and inverter-based DGs are connected to the distribution power network. The allowable penetration level of DGs is determined based on power quality constraints including total harmonic voltage distortion, individual harmonic voltage distortion, and RMS bus voltage limits in the optimization framework. Fuzzy-c means clustering method is also applied to decrease the computational effort of the optimization process in the long-term load profile. The effectiveness of the proposed method is illustrated on the IEEE 33-bus radial distribution network for different scenarios. |
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| Keywords: | Harmonic distortion Harmonic angle adjustment Harmonic power flow Distributed generation Optimization |
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