Automatic coordination control technology of interconnected medium voltage direct current (MVDC) distribution network based on frequency deviation

IF 0.7 Q4 ENGINEERING, MECHANICAL

Journal of Vibroengineering Pub Date : 2023-02-14 DOI:10.21595/jve.2022.22849

Kunyang Ji

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引用次数: 0

Abstract

The automatic coordination control technology of interconnected medium voltage direct current (MVDC) distribution network based on frequency deviation is studied to improve the influence of frequency deviation on the operation of MVDC distribution network. Firstly, two regional interconnected MVDC distribution networks are built, and connected and operated in parallel with the AC power grid through the medium voltage single-phase AC port, to realize the interconnection of different regions of the distribution network according to the MVDC feeder. Through the mutual power support of each division of the distribution network, the frequency of each division of the distribution network is the same, and the frequency deviation of each division is reduced. According to the zoning frequency characteristics of the interconnected MVDC distribution network, the control strategy of the flexible interconnection device and the control strategy of the photovoltaic power generation system are combined to realize the automatic coordinated control of the frequency deviation of the interconnected MVDC distribution network. The experimental results show that this technology can improve the frequency deviation of the interconnected MVDC distribution network, realize the automatic coordinated control of the distribution network, and the fluctuation range of the tie line power deviation in each region decreases significantly.

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基于频率偏差的互联中压直流配电网自动协调控制技术

研究了基于频率偏差的互联中压直流配电网自动协调控制技术，以改善频率偏差对MVDC配电网运行的影响。首先，建立两个区域互联的MVDC配电网，并通过中压单相交流端口与交流电网并联运行，实现配电网不同区域根据MVDC馈线的互联。通过配电网各分区的相互功率支持，使配电网各分部的频率相同，减少了各分区的频率偏差。根据互联MVDC配电网的分区频率特性，将柔性互联装置的控制策略与光伏发电系统的控制策略相结合，实现互联MVDC配电网频率偏差的自动协调控制。实验结果表明，该技术可以改善互联MVDC配电网的频率偏差，实现配电网的自动协调控制，各区域联络线功率偏差的波动范围显著减小。

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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来源期刊

Journal of Vibroengineering 工程技术-工程：机械

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Journal of VIBROENGINEERING (JVE) ISSN 1392-8716 is a prestigious peer reviewed International Journal specializing in theoretical and practical aspects of Vibration Engineering. It is indexed in ESCI and other major databases. Published every 1.5 months (8 times yearly), the journal attracts attention from the International Engineering Community.