scholarly journals Mathematical modeling and control of wind energy electric conversion system feeding standalone load

2017 ◽  
Vol 7 (1.2) ◽  
pp. 47
Author(s):  
N K Rayaguru ◽  
N. Poornachandra Rao ◽  
K. Navin Sam ◽  
Sunil Kumar Thakur
Keyword(s):  
Wind Energy ◽  
State Space ◽  
Output Voltage ◽  
State Space Model ◽  
Synchronous Generator ◽  
Boost Converter ◽  
Duty Ratio ◽  
Space Model ◽  
Conversion System ◽  
Constant Output

In this paper, state space model of the complete Wind Energy Electric Conversion System (WEECS) comprising of wind turbine, Permanent Magnet Synchronous Generator (PMSG), uncontrolled rectifier, DC-DC boost converter, and SPWM inverter feeding a standalone load has been formulated. The derived state space model is then simulated using Matlab/Simulink to test the model. As the standalone three phase load connected to the inverter demands constant output voltage irrespective of intermittent wind pattern, a PI controller is used to control the duty ratio of DC-DC boost converter to maintain constant output voltage at the inverter end.

A novel non-isolated positive output voltage buck-boost converter

2019 ◽  
Vol 16 (1) ◽  
pp. 201-211 ◽  
Author(s):  
Tapas Kumar Mohapatra ◽  
Asim Kumar Dey ◽  
Krushna Keshab Mohapatra ◽  
Binod Sahu
Keyword(s):  
Simulation Model ◽  
State Space ◽  
Output Voltage ◽  
State Space Model ◽  
Boost Converter ◽  
Battery Charging ◽  
Content Type ◽  
Space Model ◽  
Pv Module ◽  
Conduction Mode

Purpose A two switches non-isolated DC-DC novel buck-boost converter for charging the battery of electric vehicle is projected in this paper. The performance of the converter is compared with conventional buck-boost and transformer-less P/O buck-boost converter by Shan and Faqiang. The detail operation and performance analysis of the proposed converter is described both in continuous conduction mode and discontinuous conduction mode. A state space model and simulation model is designed in MATLAB. The PID controller parameters are tuned using Single-objective Salp swarm optimization algorithm using MATLAB. The controller is implemented using DSP board. The hardware and simulation results are projected in the paper to validate the effectiveness of the proposed buck-boost converter. A comparison analysis is projected among conventional converter and Shan & Faqiang converter. Design/methodology/approach The converter state space model is designed and simulation model is also developed in MATALAB. The controller is implemented using DSP board. The parameters are obtained using optimization technique using SSA algorithm. The hardware design is also implemented, and the result is compared with the Shan and Faqiang converter. The efficiency of the converter is also tested. Findings The converter is providing a higher efficiency. The inductor current is also positive in both buck and boost mode. The robustness of the controller is better for a wide range of variation of input voltage because the output voltage remains almost constant. Therefore, this is very suitable for battery charging and PV module application. Practical implications For battery charging from PV module where voltage fluctuation is frequent. Social implications The authors can use household applications to charge the battery using PV module. Originality/value The converter design concept is new. Optimization is used to find the parameters of the controllers and is implemented in hardware design. The parameters obtained provide robustness in the converter performance.

Single Switched Non-isolated High Gain Converter

2017 ◽  
Vol 8 (1) ◽  
pp. 20
Author(s):  
Lopamudra Mitra ◽  
Ullash Kumar Rout
Keyword(s):  
Pid Controller ◽  
Output Voltage ◽  
Renewable Energy Sources ◽  
State Space Model ◽  
High Gain ◽  
Loop Control ◽  
Space Model ◽  
High Voltage Gain ◽  
Constant Output ◽  
Close Loop Control

<p>This paper presents a new single switched inductor- capacitor coupled transformer-less high gain DC-DC converter which can be used in renewable energy sources like PV, fuel cell in which the low DC output voltage is to be converted into high dc output voltage. With the varying low input voltages, the output of DC-DC converter remains same and does not change. A state space model of the converter is also presented in the paper. This constant output voltage is obtained by close loop control of converter using PID controller. High voltage gain of 10 is obtained without use of transformer. All the simulations are done in MATLAB-SIMULINK environment.</p>

Parameters identification of nonlinear state space model of synchronous generator

2011 ◽  
Vol 24 (7) ◽  
pp. 1227-1237 ◽  
Author(s):  
Pangao Kou ◽  
Jianzhong Zhou ◽  
Changqing Wang ◽  
Han Xiao ◽  
Huifeng Zhang ◽  
...  
Keyword(s):  
State Space ◽  
State Space Model ◽  
Synchronous Generator ◽  
Parameters Identification ◽  
Space Model ◽  
Nonlinear State
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