Journal article Open Access

Embedding Power Line Communication in Photovoltaic Optimizer by Modulating Data in Power Control Loop

Zhu, Yue; Wu, Jiande; Wang, Ruichi; Lin, Zhengyu; He, Xiangning


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    "description": "<p>In Photovoltaic (PV) system, dc-dc power op-timizer (DCPO) is an option to maximize output power. At the same time, data links among DCPOs are often required for system monitoring and controlling. This paper pro-poses a novel power line communication (PLC) method for the DCPOs, in which the data of a DCPO is modulated into the control loop of power converter, and then transmitted through the series-connected dc power line to other DCPOs. In the process of communication, differential phase shift keying (DPSK) modulation and discrete Fourier transformation (DFT) demodulation are employed. To ana-lyze the quality of communication, the communication model of the system is built, based on small-signal model. Furthermore, the noises of the system, including switch-ing, maximum power point tracking (MPPT) and additive white Gaussian noise (AWGN), are discussed and meas-ured to evaluate the signal-to-noise ratio (SNR). At last, an experimental system including 6 DCPOs is established and tested, which verifies the feasibility and effectiveness of the proposed method.</p>", 
    "license": {
      "id": "CC-BY-4.0"
    }, 
    "title": "Embedding Power Line Communication in Photovoltaic Optimizer by Modulating Data in Power Control Loop", 
    "journal": {
      "title": "IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS"
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    "keywords": [
      "Photovoltaic (PV) system, Power line communication, DC power optimizer"
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    "publication_date": "2018-05-24", 
    "creators": [
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        "affiliation": "Zhejiang University", 
        "name": "Zhu, Yue"
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        "orcid": "0000-0003-2330-6048", 
        "affiliation": "Zhejiang University", 
        "name": "Wu, Jiande"
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      {
        "affiliation": "Zhejiang University", 
        "name": "Wang, Ruichi"
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      {
        "orcid": "0000-0001-7733-2431", 
        "affiliation": "Aston University", 
        "name": "Lin, Zhengyu"
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      {
        "affiliation": "Zhejiang University", 
        "name": "He, Xiangning"
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