Dynamic interaction characteristics of AC/DC subnet based on perturbation energy estimating in pet microgrid
Dynamic interaction characteristics of AC/DC subnet based on perturbation energy estimating in pet microgrid
- Author(s): Z. Han 1 ; J. Zheng 1 ; W. Zhao 1
- DOI: 10.1049/icp.2020.0303
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- Author(s): Z. Han 1 ; J. Zheng 1 ; W. Zhao 1
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View affiliations
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Affiliations:
1:
Department of Electrical Engineering , Tsinghua University , Beijing , China
Source:
The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020),
2021
p.
1372 – 1379
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Affiliations:
1:
Department of Electrical Engineering , Tsinghua University , Beijing , China
- Conference: The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020)
- DOI: 10.1049/icp.2020.0303
- ISBN: 978-1-83953-330-3
- Location: Online Conference
- Conference date: 02-03 July 2020
- Format: PDF
The power electronic transformer (PET) network provides a new way for the flexible operation of the distribution network and the convenient access of the distributed generation, but it also further strengthens the dynamic coupling relationship between the AC and DC subnet in the microgrid. This paper presents a quantitative method to evaluate the degree of dynamic interaction between AC and DC subnets in the PET microgrid. In this method, by injecting certain form disturbance in one port of PET, the dynamic interaction factor (DIF) index of each AC/DC subnet is proposed to describe the relative magnitude of the voltage perturbation energy between the responding subnets to the exciting subnet. Based on the proposed method, the impact of the system control parameters, voltage stabilizing capacitance parameters, PET internal topology and different types of loads on each AC/DC subnet on dynamic interaction characteristics of AC/DC subnet are studied. The results show that the method can effectively evaluate the interaction degree of AC and DC subnets of PET microgrid, and the evaluation results can provide a reference for improving the safety and stability of the system.
Inspec keywords: distributed power generation; power system stability; power transformers; distribution networks
Subjects: Distribution networks; Distributed power generation; Stability in control theory; Transformers and reactors; Power system control; Control of electric power systems