Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2018 , Vol. 52 >Issue 10: 1178 - 1188

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2018.10.005

Modeling and Digital Simulation of DC Step-Up Collection System for Large-Scale Photovoltaic Power Plants

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  • 1. Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming 650217，China; 2. School of Electrical Engineering, Chongqing University, Chongqing 400044, China; 3. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Abstract

This paper focuses on large-scale photovoltaic power plants and its collection system. By analyzing the advantages and disadvantages of various connection methods in photovoltaic power plants, a new DC step-up collection system topology for large-scale photovoltaic power plants is proposed. Based on modular multilevel converter (MMC), the topology and control of high-ratio DC/DC and DC/AC converters are addressed. The DC step-up collection system is modeled in RT-LAB. According to the principle of DC faults in the model, the simulation results are analyzed and the fault characteristic is concluded. This paper is useful to explore the new design of the DC step-up collection system and the control of the multiple converters based on the MMC.

Key words： photovoltaic power plant; DC step-up collection; modular multilevel converter (MMC); converter topology; RT-LAB simulation

Cite this article

XI Xinze,HUANG Wentao,TAI Nengling . Modeling and Digital Simulation of DC Step-Up Collection System for Large-Scale Photovoltaic Power Plants[J]. Journal of Shanghai Jiaotong University, 2018 , 52(10) : 1178 -1188 . DOI: 10.16183/j.cnki.jsjtu.2018.10.005

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