A Novel Control Algorithm for Maximum Power Point Tracking of Photovoltaic

2012 ◽  
Vol 7 (4) ◽  
Author(s):  
Xinsheng He ◽  
Chunfu Gao ◽  
Bin Wang ◽  
Zhiyong Luo
Keyword(s):  
Control Algorithm ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

A New Control Algorithm for Maximum Power Point Tracking of Photovoltaic Generation System

2011 ◽  
Vol 305 ◽  
pp. 230-234
Author(s):  
Xin Sheng He ◽  
Chun Fu Gao ◽  
Bin Wang ◽  
Zhi Yong Luo
Keyword(s):  
Output Power ◽  
Control Algorithm ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Generation System ◽  
Maximum Power Point ◽  
Photovoltaic Generation ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

In order to maximize the power of photovoltaic generation system, it is necessary to track the maximum power point (MPP). A new control algorithm of photovoltaic (PV) was proprosed, which applied constant voltage tracking method (CVT) to adjust the working point around the MPP and ensure fast tracking when external conditions or loads changed suddenly. The algorithm used the optimal gradient method (OG) to make optimization of the steady-state characteristic and could effectively reduce the output power of photovoltaic array oscillation around maximum power point tracking (MPPT). The experiment and simulation results show that the proposed algorithm could track the MPP rapidly and accurately. And also could improve the energy conversion efficiency of PV generation system by reducing the output power oscillation around MPP.

scholarly journals MPPT and SPPT Control for PV-Connected Inverters Using Digital Adaptive Hysteresis Current Control

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2075 ◽  
Author(s):  
Triet Nguyen-Van ◽  
Rikiya Abe ◽  
Kenji Tanaka
Keyword(s):  
Control Algorithm ◽  
Maximum Power Point Tracking ◽  
Current Control ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Hysteresis Current Control ◽  
Pv Systems ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

Most PV systems are usually controlled by a Maximum Power Point Tracking (MPPT) algorithm to maximize the generated electrical power. However, the maximum power is often unstable and depends on the solar irradiance and temperature. This makes it difficult to control the power grid supply-demand balance due to fluctuations caused by the increase of renewable and variable PV systems. This paper proposes a new control algorithm for a PV-connected inverter called Specified Power Point Tracking (SPPT) control in addition to the conventional Maximum Power Point Tracking (MPPT) control. The PV system is controlled to generate the maximum power or a specified power depending on the electricity transactions comes from the electricity trading system. A high-speed FPGA-based digital adaptive hysteresis current control method, which has fast and stable response and simple structure comparing with the popular Sine-triangle Pulse Width Modulation (SPWM) method, is proposed to implement the MPPT and SPPT control. The adaptive hysteresis current band is calculated adaptively to improve a disadvantage of the classical fixed band hysteresis current control on the varying switching frequency. A reference current used in the adaptive hysteresis current control is calculated such that the output power of the PV-connected inverter is maximized in the MPPT control or is maintained at a given value in the SPPT control. The experimental and simulation results show that the PV-connected inverter under the proposed control algorithm generates the desired power almost exactly and yields stable and fast response despite the varying irradiance.

A Novel Control Algorithm for Maximum Power Point Tracking of Automatic Solar Lighting System

2014 ◽  
Vol 898 ◽  
pp. 835-839
Author(s):  
Jiao Yu ◽  
Xin Sheng He ◽  
Zi Yin Shen ◽  
Xue Wen Lu ◽  
Wen Ting Wu ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Control Algorithms ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point ◽  
Observation Method ◽  
Improved Algorithm

This article describes the advantages and disadvantages of several common maximum power point tracking (MPPT) control algorithms. And integrating various control algorithms, we propose a novel MPPT control algorithm that using the short-circuit current method at the left of maximum power point, next to the maximum power point using the perturbation and observation method of variable step, which becomes gradually approaching step by step to search, the right of the maximum power point using the open circuit voltage method. In order to verify the effectiveness of the improved algorithm, this paper also compares the traditional perturbation and observation method with the improved algorithm for the simulation, the solar cell output power curve obtained in the experiment will be introduced in the text in detail.

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