智能变压器电网的鲁棒控制

Zhixiang Zou, Jian Tang, Yi Zhang, Xingqi Liu, Z. Wang, Mingke Cheng
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引用次数: 1

摘要

智能变压器(ST)是一种具有控制和通信功能的固态变压器,可连接中压和低压(LV)电网。st馈电电网在优化电力系统、避免或推迟配电网加固方面具有很大的潜力。然而,随着功率变换器的日益普及,系统的稳定性也面临着挑战。为了更好地理解这些问题,本文首先建立了低压电网中使用的ST低压变流器和成网以及随网变流器的模型。然后,考虑线路阻抗的影响,研究了不同变流器类型的st馈电电网的稳定性。为了解决稳定性问题,提出了一种鲁棒控制策略。仿真结果验证了所提控制方案的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Robust Control of Smart Transformer-fed Grid
The Smart Transformer (ST) is a solid-state transformer with control and communication functionalities, interfacing medium voltage and low voltage (LV) grids. The ST-fed grid has high potential to optimize power system and avoid or postpone the reinforcement of distribution networks. However, with the increasing utilization of power converters, the challenges in terms of system stability are encountered. To better understand the problems, this paper firstly develops the models of ST LV converter and grid-forming as well as grid-following converters used in the LV grid. Then, the stability of a ST-fed grid with different types of converters is studied by considering the effect of line impedance. To address the stability issues, a robust control strategy is proposed for the ST LV converter. Simulation results are provided to validate the effectiveness of the proposed control scheme.
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