Flexibilities of a Voltage Support Control Strategy for Grid-Connected Inverter-Interfaced Distributed Generators during Voltage Sags

2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2023-06-09 DOI:10.1109/PEDG56097.2023.10215232

Ingrid J. Moreno, Maria A. Mantilla, Astrid Esparza, J. Rey, D. J. Rincón

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Abstract

Modern grid codes require that inverter-interfaced distributed generators include a low voltage ride-through (LVRT) capability to remain connected to the grid and provide voltage support when a sag occurs. To implement this capability, flexible control strategies are widely considered since they allow the achievement of different control objectives by correctly setting some control parameters. This paper presents a generalization of a flexible control strategy to provide voltage support during voltage sags using the maximum inverter power capability. The strategy considers four control parameters whose variation results in different voltage support capabilities. Consequently, an algorithm that allows to identify the support capabilities and the operating characteristics of the system according to the variation of the control parameters is presented. Simulation studies are performed on Matlab to validate the analysis.

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电压跌落时并网逆变器接口分布式发电机电压支持控制策略的灵活性

现代电网规范要求逆变器接口的分布式发电机具有低电压穿越(LVRT)能力，以保持与电网的连接，并在发生凹陷时提供电压支持。为了实现这种能力，灵活的控制策略被广泛考虑，因为它们允许通过正确设置一些控制参数来实现不同的控制目标。本文提出了一种灵活的控制策略，利用逆变器的最大功率能力在电压跌落期间提供电压支持。该策略考虑了四个控制参数，它们的变化导致了不同的电压支持能力。因此，提出了一种算法，可以根据控制参数的变化来识别系统的支持能力和运行特性。在Matlab上进行了仿真研究以验证分析结果。

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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2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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