An Improved Crow Search Algorithm to Control MPPT Under Partial Shading Conditions

2021 ◽  
Author(s):  
K.T Swetha ◽  
Abin Robinson ◽  
Venugopal Reddy Barry ◽  
Harish Kumar Varma Gadiraju
Keyword(s):  
Search Algorithm ◽  
Partial Shading

scholarly journals PV Solar-Optimal Maximum Power Search using a Modified P&O Technique

2017 ◽  
Vol 2 (5) ◽  
pp. 13
Author(s):  
Mohamed Salama Ebrahim ◽  
Adel M. Sharaf ◽  
Ahmed M. Atallah ◽  
Adel Sedky Emarah
Keyword(s):  
Smart Grid ◽  
Reactive Power ◽  
Search Algorithm ◽  
Digital Simulation ◽  
Maximum Power ◽  
Energy Utilization ◽  
Pv System ◽  
Partial Shading ◽  
Point Tracking ◽  
Power Point

Smart Grid- PV system interface requires power electronic converter interface and robust optimal controller to ensure maximum solar energy utilization. This paper presents a new Controller based on an optimized search algorithm for maximum power point tracking controller performance using a modified Perturb and Observe P&O Algorithm for a smart grid connected PV DC-AC interface system. The modified P & O method is based on dividing the change of the power into three distinct zones with assigned zone- duty cycle ratio of the Chopper converter (D) has an initial preset value. The feasibility of the proposed method is easily implemented using proportional plus integral and fuzzy logic controllers. The controllers are assumed to control the active output power through adjusting of the dc bus voltage as well as the reactive power given to the ac smart grid network. Digital simulation results of a comparison with conventional P&O approach reflects the fast conversion and dynamic superiority of the new algorithm even under both uniform and partial shading conditions. Furthermore, the active and reactive output powers are regulated at the inverter interface with smart grid.

scholarly journals Maximum power point tracking of partially shading PV system using cuckoo search algorithm

2019 ◽  
Vol 10 (2) ◽  
pp. 1081 ◽  
Author(s):  
Ahmed Ibrahim ◽  
Raef Aboelsaud ◽  
Sergey Obukhov
Keyword(s):  
High Efficiency ◽  
Search Algorithm ◽  
Cuckoo Search ◽  
Cuckoo Search Algorithm ◽  
Maximum Power ◽  
Global Maximum ◽  
Pv System ◽  
Maximum Power Point ◽  
Partial Shading ◽  
Power Point

This paper presents a cuckoo search (CS) algorithm for determining the global maximum power point (GMPP) tracking of photovoltaic (PV) under partial shading conditions (PSC). The conventional methods are fail to track the GMPP under PSC, which decrease the reliability of the power system and increase the system losses. The performance of the CS algorithm is compared with perturb and observe (P&O) algorithm for different cases of operations of PV panels under PSC. The CS algorithm used in this work to control directly the duty cycle of the DC-DC converter without proportional integral derivative (PID) controller. The proposed CS model can track the GMPP very accurate with high efficiency in less time under different conditions as well as in PSC.

A novel global MPPT technique based on squirrel search algorithm for PV module under partial shading conditions

2021 ◽  
Vol 230 ◽  
pp. 113773
Author(s):  
Dalila Fares ◽  
Mohamed Fathi ◽  
Immad Shams ◽  
Saad Mekhilef
Keyword(s):  
Search Algorithm ◽  
Partial Shading ◽  
Pv Module ◽  
Global Mppt

scholarly journals Modelling and Analysis of Photovoltaic System under Partially Shaded Conditions using Improved Harmony Search Algorithm

2021 ◽  
Vol 17 (4) ◽  
pp. 269-277
Author(s):  
S. Sani ◽  
G.A. Olarinoye ◽  
P.U. Okorie
Keyword(s):  
Search Algorithm ◽  
Harmony Search ◽  
Harmony Search Algorithm ◽  
Photovoltaic System ◽  
Pv System ◽  
Partial Shading ◽  
Excessive Heat ◽  
Improved Harmony Search ◽  
Improved Harmony Search Algorithm ◽  
Global Peak

With the increasing penetration of solar electricity in residential, institutional and commercial centres around the globe, the phenomenon of partial shading (PS) in Photovoltaic (PV) power generation is gaining attention. Under Partial shading condition (PSC), cells that are shaded tends to have an equivalent current with cells that are unshaded in series-connection, due to this, the shaded cells operates in reverse bias and consequently becomes load and consumes the generated power. This causes a serious problem known as hotspot. This is characterized by the presence of excessive heat which consequently reduces the total generated power. Recently, researchers use the technique of bypass diodes across the PV cells so that the problem of partial shading can be reduced, but this solution taken alone, has made the nonlinearity and complexity of the system to increase. The shaded cells generate multiple peaks with only one global peak. Conventional Maximum Power Point Tracking (MPPT) algorithms do not differentiates the global peak from local peaks which may end up tracking local peak as global peak, this results in serious power loss. This paper seeks to solve this problem by modelling a PV system under PSC and through the application of Improved Harmony Search algorithm (IHSA) and variable step Perturb & Observe (P&O) to track the global peak instead of local peaks. Simulation was done in MATLAB/Simulink 2018a environment, and the results under standard test condition (STC) and PSC showed that the proposed IHSA had an improvement of 25%, 3.17% and 2.27%, 3.07% and 2.21%, 3.26% and 2.26% when compared with the improved particle swarm optimization (IPSO) under STC and PSC conditions respectively, which had a better advantage of minimizing power oscillation and improving the efficiency of the system, improved MPPT tracking, reduced error and a better tracking efficiency in both conditions. Keywords: MPPT, photovoltaic system, partial shading, tracking efficiency, Harmony search algorithm

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