Abstract
In a photovoltaic system, a dc-dc power optimizer (DCPO) is an option to maximize the output power. At the same time, data links among DCPOs are often required for system monitoring and controlling. This paper proposes a novel power line communication method for the DCPOs, in which the data of a DCPO are modulated into the control loop of a power converter, and then transmitted through the series-connected dc power line to other DCPOs. In the process of communication, differential phase-shift keying modulation and discrete Fourier transformation demodulation are employed. To analyze the quality of communication, the communication model of the system is built, based on a small-signal model. Furthermore, the noises of the system, including switching, maximum power point tracking, and additive white Gaussian noise, are discussed and measured to evaluate the signal-to-noise ratio. Lastly, an experimental system including six DCPOs is established and tested, which verifies the feasibility and effectiveness of the proposed method. © 1982-2012 IEEE.
| Original language | English |
|---|---|
| Article number | 8365138 |
| Pages (from-to) | 3948-3958 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 66 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 May 2019 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Funding
Manuscript received February 4, 2018; revised April 26, 2018; accepted May 3, 2018. Date of publication May 24, 2018; date of current version December 28, 2018. This work was supported by the National Nature Science Foundation of China under Grant 51577170, in part by the National Key Technologies R&D Program of China under Grant 2017YFE0112400, and in part by the European Union’s Horizon 2020 research and innovation programme under Grant 734796. (Corresponding author: Jiande Wu.) Y. Zhu, J. Wu, and R. Wang are with the College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China (e-mail: [email protected]; [email protected]; [email protected]).
Research Keywords
- DC power optimizer
- photovoltaic (PV) system
- power line communication
