Modified unified power flow controller for medium voltage distribution networks
Modified unified power flow controller for medium voltage distribution networks
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DOI：
10.1049/gtd2.12567
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发表时间：
2022-08
期刊：
影响因子：
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通讯作者：
Mohamed A. Abdelrahman;Peng Yang;Wenlong Ming;Jianzhong Wu;N. Jenkins
中科院分区：
文献类型：
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作者：
Mohamed A. Abdelrahman;Peng Yang;Wenlong Ming;Jianzhong Wu;N. Jenkins
传统的统一潮流控制器（UPFC）可以在使用部分额定转换器的中压（MV）配电网络中提供潮流控制和电压调节。然而，使用传统UPFC的主要挑战之一是串联接口变压器（Transformer）的独特设计。本文研究了一种适用于中压配电网的UPFC的改进拓扑。改进后的UPFC不需要接口串联Transformer。因此，它提供了比传统UPFC更小的尺寸，更轻的重量和更低的成本。它由单相背靠背串联和并联电压源换流器组成。串联转换器无需串联Transformer即可连接到配电网，而并联转换器则使用三相并联Transformer连接。考虑到配电网络具有低的X/R比的串联和并联变换器的额定功率进行了研究。修改后的UPFC在MATLAB Simulink中建模，并连接到两母线配电网和增强的IEEE 33母线配电网。结果表明，修改后的UPFC的能力，独立控制有功和无功功率在配电馈线处理一小部分的功率传输通过转换器。
A conventional unified power flow controllers (UPFCs) can provide power flow control and voltage regulation in medium voltage (MV) distribution networks using partially rated converters. However, one of the main challenges of using the conventional UPFC is the unique design of the series interfacing transformer. This paper investigates a modified topology of a UPFC suitable for MV distribution networks. The modified UPFC does not need an interfacing series transformer. Hence, it offers a smaller size, lighter weight, and less cost than the conventional UPFC. It consists of single‐phase back‐to‐back series and shunt voltage source converters. The series converters are connected to a distribution network without a series transformer, while the shunt converters are interfaced using a three‐phase shunt transformer. The power ratings of the series and shunt converters were investigated considering a distribution network with a low X/R ratio. The modified UPFC was modelled in MATLAB Simulink and was connected to a two‐busbar distribution network and the enhanced IEEE 33‐bus distribution network. The results showed the ability of the modified UPFC to independently control active and reactive power in a distribution feeder by processing a fraction of the power transfer through the converters.