An exact discrete-time model considering dead-time nonlinearity for an H-bridge grid-connected inverter

2014 ◽  
Author(s):  
Ruiliang Xie ◽  
Xiang Hao ◽  
Xu Yang ◽  
Wenjie Chen ◽  
Lang Huang ◽  
...  
Keyword(s):  
Discrete Time ◽  
Dead Time ◽  
Time Model ◽  
Discrete Time Model ◽  
Grid Connected Inverter

A UNIFIED "SCALAR" DISCRETE-TIME MODEL FOR ENHANCING BIFURCATION PREDICTION IN DIGITALLY CONTROLLED H-BRIDGE GRID-CONNECTED INVERTER

2013 ◽  
Vol 23 (07) ◽  
pp. 1350126 ◽  
Author(s):  
BO LEI ◽  
GUOCHUN XIAO ◽  
XUANLV WU ◽  
LIFU ZHENG
Keyword(s):  
Discrete Time ◽  
Stability Boundary ◽  
Period Doubling ◽  
The State ◽  
Order System ◽  
Time Model ◽  
Discrete Time Model ◽  
State Variable ◽  
Digitally Controlled ◽  
Grid Connected Inverter

In this paper, a unified "scalar" discrete-time model is proposed for enhanced bifurcation prediction in digitally controlled H-bridge grid-connected inverter system. The model is established by analytically expressing the elements of the matrix exponential involved in the exact discrete-time model. In high-order system, different from the discrete-time model using the state-transition matrix directly, obtaining the discrete-time model of the state-variable vector only, in this system, the discrete-time model of each state variable can be obtained directly and separately. In addition, the stability boundary of Hopf bifurcation, period-doubling bifurcation and saddle-node bifurcation can be obtained by analytical expressions. The modeling method is validated by an LCL-filter system as an example using practical circuit parameters. The results of the analysis can simplify the modeling process and enhance the bifurcation prediction of the digitally controlled inverter system.

Non-homogeneous infinitely many sites discrete-time model with exact coalescent

2009 ◽  
Vol 33 (6) ◽  
pp. 713-732
Author(s):  
Adam Bobrowski ◽  
Marek Kimmel ◽  
Małgorzata Kubalińska
Keyword(s):  
Discrete Time ◽  
Time Model ◽  
Discrete Time Model
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