An Improved P&O MPPT Method for Photovoltaic Power System

2013 ◽  
Vol 805-806 ◽  
pp. 45-51 ◽  
Author(s):  
Bao Liang Zan ◽  
Yong Duan Song ◽  
Lei Wang ◽  
Yan Hui Wang ◽  
Xiao Qiang Du ◽  
...  
Keyword(s):  
Digital Signal Processor ◽  
Digital Signal ◽  
Boost Converter ◽  
Utilization Efficiency ◽  
System Model ◽  
Theory Analysis ◽  
Photovoltaic Array ◽  
Photovoltaic Power ◽  
Output Characteristics ◽  
Array Output

To improve the utilization efficiency of the solar energy with certain conversion efficiency, the principle of MPPT control with Boost converter is explained according to photovoltaic array output characteristics. The disadvantage of the conventional perturbation and observation (P&O) is analyzed. A novel MPPT system based on a digital signal processor (DSP) with Boost converter and an improved P&O algorithm is proposed in this paper. The proposed MPPT system model is developed under Matlab/Simulink. At last, theory analysis indicates its feasibility while the simulation results verify its validity.

Design and Performance Test of Digital Rebalance Loop for MEMS Gyroscope

2006 ◽  
Vol 326-328 ◽  
pp. 249-252 ◽  
Author(s):  
Byung Su Chang ◽  
Jang Gyu Lee ◽  
Tae Sam Kang
Keyword(s):  
Digital Signal Processor ◽  
Performance Test ◽  
Digital Signal ◽  
System Model ◽  
Digital Controller ◽  
Control Technique ◽  
Response Analysis ◽  
Frequency Response Analysis ◽  
Mems Gyroscope ◽  
And Performance

In this paper, a digital rebalance loop for MEMS gyroscope is designed and its performance test is performed. First, the system model of MEMS gyroscope is established by dynamic analysis. Then, the digital rebalance loop is designed using modern control technique. The performance of the digital rebalance loop is compared with that of conventional PID rebalance loop. Through frequency response analysis using MATLAB and experiments using a real MEMS gyroscope and digital controller, which is realized using digital signal processor (DSP), it is confirmed that the controller improves the performance of the gyroscope.

PV Cells Power Generation System Modeling Based on Heat Energy Efficiency

2014 ◽  
Vol 986-987 ◽  
pp. 1977-1983
Author(s):  
Feng Feng Li ◽  
Qiu Xuan Wu ◽  
Li Juan Huang ◽  
Yu Jie Huang
Keyword(s):  
Power Generation ◽  
Energy Efficiency ◽  
Photovoltaic Cell ◽  
Utilization Efficiency ◽  
System Model ◽  
Generation System ◽  
Generation Efficiency ◽  
Photovoltaic Power ◽  
Environment Temperature ◽  
Power Generation System

Temperature is one of the important factors affecting the power generation efficiency of PV cells. In order to improve the efficiency of photovoltaic power generation systems and heat utilization efficiency, we used Matlab/Simulink to build photovoltaic power system analysis model based on thermal power. By changing the heat and illumination input to the photovoltaic cell model and the heat generated by the battery we got the characteristics and temperature characteristics of the photovoltaic cell the system model, the photovoltaic power generation system model and the output power correction, etc. We got the environmental temperature change equation through the actual air temperature and curve fitting and used real and detailed data to compare the data obtained using the equation for online correction. PV cells temperature factor was used to get the PV cells temperature with the environment temperature changes. In order to get PV module thermal /energy efficiency the dates was processed and analyzed by using Matlab and Excel through actual observation data of school 120KW PV power station. The results showed that power generation efficiency increased and year average efficiency PV improved 21.3279% through the use of some heat about PV cells.

scholarly journals Designing a Single-Stage Inverter for Photovoltaic System Application

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
M. T. Tsai ◽  
C. L. Chu ◽  
C. M. Mi ◽  
J. Y. Lin ◽  
Y. C. Hsueh
Keyword(s):  
System Application ◽  
Digital Signal Processor ◽  
High Frequency ◽  
Digital Signal ◽  
Photovoltaic System ◽  
Control Technique ◽  
Switching Function ◽  
Photovoltaic Power ◽  
Power Point ◽  
Two Stages

This paper focuses on a full-bridge high-frequency isolated inverter which is proposed for distributed photovoltaic power supply application. The researched system consists of a full-bridge high-frequency DC/DC converter with the proposed symmetric phase-shift modulation algorithm to achieve the ZVS switching function and a line frequency unfolding bridge. It replaces the traditional two stages of independent control algorithms with a one-stage control to obtain high conversion efficiency. A TMS 320F2812 digital signal processor-based control technique is used to achieve the desired algorithm function for the grid-connected photovoltaic power system application. The researched system can have two operating methods depending on the applied situation. Finally, a prototype of 300 W with the maximum power point function is settled to verify the proposed idea.

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