Journal of Shandong University(Engineering Science) ›› 2021, Vol. 51 ›› Issue (3): 91-100.doi: 10.6040/j.issn.1672-3961.0.2020.472

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Reduced-order analytical model to evaluate photovoltaic low-voltage ride-through performance

NIU Shuanbao1, HUO Chao1, CHEN Chunmeng2, KE Xianbo1, WANG Xiaohui3, ZHANG Qiang3*, CHEN Ning4   

  1. 1. Northwest Branch, State Grid Corporation, Xi'an 710048, Shaanxi, China;
    2. State Grid Qinghai Electric Power Company, Xining 810008, Qinghai, China;
    3. Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education(Shandong University), Jinan 250061, Shandong, China;
    4. National Key Laboratory of Operation and Control of Renewable Energy and Energy Storage, China Electric Power Research Institute(Nanjing), Nanjing 210003, Jiangsu, China
  • Online:2021-06-20 Published:2021-06-24

Abstract: A reduced-order analytical model to evaluate the performance of PV in case of low-voltage ride through(LVRT)was proposed based on the idea of order reduction at each unit, focusing on the DC bus voltage which determined the outcome of ride-through. Such a method covered the major factors with regard to PV LVRT, and included the responses by the converter controller and phase-locked loop. Meanwhile, it took the supporting of reactive power outputs from PV on the point of common coupling(PCC)voltage into consideration, so as to reflect that PV provides reactive power support to AC system. To validate the proposed reduced-order analytical model, the comparison with the simulation results derived from PSCAD confirmed its accuracy and feasibility.

Key words: reduced-order model, dynamic model, reactive power support, grid-connected photovoltaic system, low-voltage ride-through

CLC Number: 

  • TM743
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