Reverse droop control strategy with virtual resistance for low-voltage microgrid with multiple distributed generation sources

IF 1.5 Q2 ENGINEERING, MULTIDISCIPLINARY

Open Engineering Pub Date : 2023-01-01 DOI:10.1515/eng-2022-0395

Chethan Raj Devaraju, Dadadahalli Basavaraju Prakash, Chaluvaiah Lakshminarayana

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引用次数: 0

Abstract

Abstract In the island operation mode of the microgrid, the rated capacity and feeder impedance of each parallel distributed generation inverter are different and the output power is difficult to be reasonably distributed when the traditional droop control strategy is adopted, which reduces the stability of the system. In order to solve this problem, the power transmission characteristics of low-voltage microgrid are analyzed and the leading factors affecting the reasonable power distribution are obtained. A control strategy of virtual resistor is proposed and the difference between the actual output power and the expected output power is used to control the power compensation coefficient and proportional integration to adjust the reference voltage of each DG inverter. The control strategy can automatically adjust the change in the output power of the distributed power supply in real time, adjust the voltage change caused by the line impedance mismatch in time, improve the power quality, reduce the system circulation, and realize the reasonable distribution of power. Finally, the simulation model verifies the effectiveness of the strategy.

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多分布式电源低压微电网的虚电阻反向下垂控制策略

摘要在微网孤岛运行模式下，各并联分布式发电逆变器的额定容量和馈线阻抗不同，采用传统的下垂控制策略难以合理分配输出功率，降低了系统的稳定性。为了解决这一问题，分析了低压微电网的输电特性，得出了影响其合理配电的主要因素。提出了一种虚拟电阻控制策略，利用实际输出功率与期望输出功率的差值控制功率补偿系数和比例积分来调节各DG逆变器的参考电压。该控制策略可以实时自动调节分布式电源输出功率的变化，及时调整线路阻抗失配引起的电压变化，提高电能质量，减少系统循环，实现电力的合理分配。最后，通过仿真模型验证了该策略的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Open Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

30 weeks

期刊介绍： Open Engineering publishes research results of wide interest in emerging interdisciplinary and traditional engineering fields, including: electrical and computer engineering, civil and environmental engineering, mechanical and aerospace engineering, material science and engineering. The journal is designed to facilitate the exchange of innovative and interdisciplinary ideas between researchers from different countries. Open Engineering is a peer-reviewed, English language journal. Researchers from non-English speaking regions are provided with free language correction by scientists who are native speakers. Additionally, each published article is widely promoted to researchers working in the same field.