Stabilisation strategy based on feedback linearisation for DC microgrid with multi‐converter

Autor: Zhongtian Zhao, Jian Hu, Xuanying Shao
Rok vydání: 2018
Předmět:
power generation control
negative incremental resistance
Computer science
Energy Engineering and Power Technology
feedback
nonlinear system
feedback linearisation
Electric power system
power electronic converters
distributed power generation
power system stability
stabilisation strategy
Control theory
buck mode
MATLAB
feedback coefficient
Matlab
computer.programming_language
linearised system
State-space representation
linearisation techniques
Linear system
linear systems
General Engineering
DC-DC power convertors
coordinate transformation
Converters
multiconverter
DC–DC bidirectional converter
Power (physics)
state-space methods
DC microgrid system
lcsh:TA1-2040
point-of-load converters
boost mode
Equivalent circuit
Microgrid
nonlinear systems
lcsh:Engineering (General). Civil engineering (General)
computer
Software
Zdroj: The Journal of Engineering (2019)
ISSN: 2051-3305
DOI: 10.1049/joe.2018.8727
Popis: Power electronic converters have been widely used in power system and the stability issues of DC microgrid with converters will be discussed in this study. Firstly, an equivalent circuit and the corresponding state space model for DC microgrid with DC–DC converters were established. The model shows that the DC microgrid systems with DC–DC bidirectional converter in boost or buck mode is a non-linear system, and the tightly regulated point-of-load converters may destabilise the system because it introduces negative incremental resistance to DC microgrid. Then the method of exact feedback linearisation, which transforms the non-linear system into the linear system by coordinate transformation, was applied to stabilise DC microgrid system, and the stabilisation strategy of non-linear system was determined by designing the feedback coefficient of the linearised system. Finally, the feasibility and effectiveness of the stabilisation strategy for DC microgrid with DC–DC bidirectional converter have been verified by the results of simulation with MATLAB.
Databáze: OpenAIRE
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