Stability Analysis and Stability Enhancement Based on Virtual Harmonic Resistance for Meshed DC Distributed Power Systems with Constant Power Loads

Huiyong Hu, Xiaoming Wang, Yonggang Peng, Yanghong Xia, Miao Yu and Wei Wei
Additional contact information
Huiyong Hu: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Xiaoming Wang: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Yonggang Peng: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Yanghong Xia: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Miao Yu: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Wei Wei: College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Energies, 2017, vol. 10, issue 1, 1-15

Abstract: This paper addresses the stability issue of the meshed DC distributed power systems (DPS) with constant power loads (CPLs) and proposes a stability enhancement method based on virtual harmonic resistance. In previous researches, the network dynamics of the meshed DC DPS are often ignored, which affects the derivation of the equivalent system impendence. In addition, few of them have considered the meshed DC DPS including multiple sources with voltage-controlled converters and CPLs. To tackle the aforementioned challenge, this paper mainly makes the following efforts. The component connection method (CCM) is employed and expanded to derive the stability criterion of the meshed DC DPS with CPLs. This stability criterion can be simplified to relate only with the network node admittance matrix, the output impendences of the sources, and the input admittances of the CPLs. A virtual harmonic resistance through the second-order generalized integrator (SOGI) is added in the source with the voltage-controlled converter to lower the peak of the source output impendence, which can enhance the stability of the meshed DC DPS. The effectiveness of the proposed stability criterion and stability enhancement method are verified by nonlinear dynamic simulations.

Keywords: meshed DC distributed power systems; stability criterion; virtual harmonic resistance; stability enhancement (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/10/1/69/pdf (application/pdf)
https://www.mdpi.com/1996-1073/10/1/69/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:10:y:2017:i:1:p:69-:d:87216

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().