A Power Balance Strategy of DC Microgrid Based on Improved Droop Control
As a widely used control strategy for microgrids， droop control has notable advantages of dispensing with communication networks， plug and play， etc. However， there exists an inherent contradiction between current distribution accuracy and bus voltage balance in traditional droop control. To solve t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
zhejiang electric power
2022-06-01
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| Series: | Zhejiang dianli |
| Subjects: | |
| Online Access: | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=47b0cf87-6dc0-4358-b7ed-83818c5164e9 |
| Summary: | As a widely used control strategy for microgrids， droop control has notable advantages of dispensing with communication networks， plug and play， etc. However， there exists an inherent contradiction between current distribution accuracy and bus voltage balance in traditional droop control. To solve this problem， an improved droop control strategy is proposed in this paper. Firstly， by injecting AC small signal into the converter， the frequency is introduced as the global control variable； secondly， the power balance between DGs is realized in line with the characteristics of frequency droop and voltage droop. In order to improve the poor power quality caused by the injected AC small signal， the injection of AC signal is stopped when the system becomes stable. Finally， the effectiveness and feasibility of the control strategy in current distribution and bus voltage maintenance are verified by MATLAB/Simulink. |
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| ISSN: | 1007-1881 |