利用光伏逆变器外部指令实验确定等效电网阻抗的方法

电力电子 Pub Date : 2019-12-01 DOI:10.1109/COBEP/SPEC44138.2019.9065499

Valesca Bettim Feltrin, Thiago Brezolin Dalmolin, L. Bellinaso, L. Michels

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引用次数: 0

摘要

等效电网阻抗是测试并网逆变器控制稳定性的重要信息。此外，当局部负荷或发电机的有功和无功功率发生变化时，电网阻抗参数对局部电网电压也会产生影响。在巴西技术标准协会(ABNT)巴西监管标准(NBR) 16149等并网标准中，大于6kw的光伏(PV)逆变器应具有有功功率和无功功率的外部控制。本文提出了一种通过使用光伏逆变器的外部命令来实验确定电网阻抗的方法。以某光伏电站100kw逆变器为实验对象，计算了局部电网阻抗。最后，通过仿真验证了阻抗计算的正确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Methodology for experimental determination of equivalent grid impedance by using external commands of PV inverters

Equivalent grid impedance is an important information for testing control stability of grid-connected inverters. Furthermore, grid impedance parameters impact on local grid voltage when the local load or generator changes its active and reactive power. In grid connection standards such as the Brazilian Association of Technical Standards (ABNT) Brazilian Regulatory Standard (NBR) 16149, Photovoltaic (PV) inverters higher than 6 kW shall have external control of active and reactive power. This manuscript proposes a methodology for experimental determination of grid impedance by using the external commands of PV inverters. Experimental results were obtained with a 100 kW inverter of a photovoltaic power plant, and then the local grid impedance was calculated. Finally, the impedance calculation was validated in simulation.

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电力电子

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