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Inertia and Damping Analysis of Grid-Tied Photovoltaic Power Generation System With DC Voltage Droop Control
- Source :
- IEEE Access, Vol 9, Pp 38411-38418 (2021)
- Publication Year :
- 2021
- Publisher :
- IEEE, 2021.
-
Abstract
- Photovoltaic power generation relies on power electronics and therefore does not have natural inertia and damping characteristics. In order to make the capacitance of the medium time scale participate in the grid frequency response without adding additional equipment, this paper takes the grid-connected photovoltaic power generation system based on DC voltage droop control as the research object, and establishes the static synchronous generator (SSG) model of the system. The model is used to analyze the main parameters affecting the inertia, damping and synchronization characteristics of the system and their influence laws. The research results show that the energy storage effect of the capacitor on the medium time scale can also make the system exhibit certain inertia characteristics. From the point of view of control parameters, as the droop coefficient $D_{\mathrm {p}}$ decreases, the inertia characteristic exhibited by the system is stronger. The larger the DC voltage outer loop proportional coefficient $K_{\mathrm {p}}$ is, the stronger the damping effect of the system is. The larger the DC voltage outer loop integral coefficient $K_{\mathrm {i}}$ , the stronger the synchronization capability of the system. In addition, the MATLAB/Simulink simulation platform is used to verify the correctness of the theoretical analysis results.
- Subjects :
- General Computer Science
020209 energy
media_common.quotation_subject
Grid-connected photovoltaic power generation system
02 engineering and technology
Permanent magnet synchronous generator
Inertia
Capacitance
law.invention
Synchronization (alternating current)
law
Control theory
Power electronics
Frequency grid
0202 electrical engineering, electronic engineering, information engineering
General Materials Science
Voltage droop
media_common
DC voltage droop control
Physics
damping effect
020208 electrical & electronic engineering
General Engineering
synchronization ability
Capacitor
inertia characteristic
lcsh:Electrical engineering. Electronics. Nuclear engineering
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 21693536
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- IEEE Access
- Accession number :
- edsair.doi.dedup.....bf67022d115b546c4124c18f11d22e39