Research on Voltage Deviation and Voltage Regulation Optimization Simulation of 10kV Distribution Network Connected with Distributed Photovoltaics
DOI:
https://doi.org/10.71222/nj78xd39Keywords:
distributed photovoltaics, distribution network, voltage deviation, reactive power control, simulink simulation, power qualityAbstract
Driven by the carbon peaking and carbon neutrality goals, a large number of residential and industrial and commercial distributed photovoltaic systems have been connected to 10kV medium-voltage distribution networks. The output power of photovoltaics fluctuates in real time with light intensity, which easily causes a series of power quality problems such as over-limit voltage at the end of distribution networks, reverse power flow, and three-phase voltage unbalance. The traditional voltage control method relying on switched capacitor banks suffers from slow response speed and cannot adapt to the intermittent output characteristics of photovoltaic power generation. Taking a suburban 10kV radial distribution network as the research object, this paper establishes a mathematical model of photovoltaic arrays and builds a simulation model of the distribution network with distributed photovoltaics via MATLAB/Simulink. The influence rules of photovoltaic access capacity, access location, and light fluctuation on node voltage of lines are systematically analyzed. A coordinated reactive power control strategy based on photovoltaic inverters is proposed to address the problem of over-limit voltage, which relies on the residual reactive power capacity of inverters to adjust reactive power in real time and realizes combined voltage control together with fixed capacitors. Simulation test results demonstrate that the proposed combined voltage control scheme can stabilize the node voltage of the distribution network within the range specified by national standards, effectively suppress voltage deviation caused by photovoltaic power generation, and achieve a faster voltage control response speed than the traditional capacitor switching scheme, possessing practical engineering application value.References
1. J. Machowski, J. W. Bialek, J. Bialek, and J. R. Bumby, Power System Dynamics and Stability. Hoboken, NJ: John Wiley & Sons, 1997.
2. P. Caramia, G. Carpinelli, and P. Verde, Power Quality Indices in Liberalized Markets. Hoboken, NJ: John Wiley & Sons, 2009.
3. J. Bird, Electrical and Electronic Principles and Technology. Abingdon, UK: Routledge, 2017.
4. Y. Li, J. Zhao, X. Yang, H. Wang, and Y. Wang, "Research on Scheduling Strategy of Flexible Interconnection Distribution Network Considering Distributed Photovoltaic and Hydrogen Energy Storage," Energy Engineering, vol. 121, no. 5, 2024.
5. R. A. Jabr, "Linear decision rules for control of reactive power by distributed photovoltaic generators," IEEE Trans. Power Syst., vol. 33, no. 2, pp. 2165–2174, Mar. 2017.
6. M. A. Alipour and A. Askarzadeh, "An efficient optimization framework for distribution network planning by simultaneous allocation of photovoltaic distributed generations and transformers," IET Renew. Power Gener., vol. 18, no. 2, pp. 153–168, Feb. 2024.
7. X. Zhang, J. Wang, J. Wang, H. Wang, and L. Lu, "Enhanced LSTM-based robotic agent for load forecasting in low-voltage distributed photovoltaic power distribution network," Front. Neurorobot., vol. 18, p. 1431643, 2024.
8. E. Dall’Anese, S. V. Dhople, B. B. Johnson, and G. B. Giannakis, "Decentralized optimal dispatch of photovoltaic inverters in residential distribution systems," IEEE Trans. Energy Convers., vol. 29, no. 4, pp. 957–967, Dec. 2014.
9. X. Guo, G. Miao, X. Wang, L. Yuan, W. Li, E. Wu, and X. Yibulayimu, "Risk assessment of distribution network operation with scale distributed photovoltaics," in J. Phys.: Conf. Ser., vol. 2728, no. 1, p. 012071, Mar. 2024.
10. L. Wei, Y. Guosheng, Z. Zexin, L. Qingmian, D. Dingxiang, and L. Yu, "Impact of the distributed photovoltaic on the current protection of 10kV distribution network," in 2013 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), Dec. 2013, pp. 1–4.
11. J. V. Paatero and P. D. Lund, "Effects of large-scale photovoltaic power integration on electricity distribution networks," Renew. Energy, vol. 32, no. 2, pp. 216–234, Feb. 2007.
12. C. Li, H. Zhou, J. Li, and Z. Dong, "Economic dispatching strategy of distributed energy storage for deferring substation expansion in the distribution network with distributed generation and electric vehicle," J. Cleaner Prod., vol. 253, p. 119862, Apr. 2020.
13. S. S. Guggilam, E. Dall’Anese, Y. C. Chen, S. V. Dhople, and G. B. Giannakis, "Scalable optimization methods for distribution networks with high PV integration," IEEE Trans. Smart Grid, vol. 7, no. 4, pp. 2061–2070, Jul. 2016.
14. A. Canova, L. Giaccone, F. Spertino, and M. Tartaglia, "Electrical impact of photovoltaic plant in distributed network," IEEE Trans. Ind. Appl., vol. 45, no. 1, pp. 341–347, Jan./Feb. 2009.
15. Y. Chai, L. Guo, C. Wang, Z. Zhao, X. Du, and J. Pan, "Network partition and voltage coordination control for distribution networks with high penetration of distributed PV units," IEEE Trans. Power Syst., vol. 33, no. 3, pp. 3396–3407, May 2018.
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Copyright (c) 2026 Jiatong Cao (Author)
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