Design of an efficient bipolar converter with fast MPPT algorithm for DC nanogrid application

Multiple local maximum power points occur in the power–voltage characteristic curve of the photovoltaic (PV) systems due to use of bypass diodes under partial shading conditions, and this also leads to decrease the maximum power level of the PV system. This paper proposes an energy recovery‐based PV system to enhance maximum power level and working efficiency under partial shading conditions. In this study, a 350‐W PV system design and application, which can operate at maximum power point under partial shading condition, is made using two 175‐W PV panels. The main purpose of the system is to maintain power generation from the shaded PV panel by energy recovery circuit without any damage on the PV panels and also connect PV panels to the grid by single power circuit. To perform the maximum power point tracking (MPPT) task for the PV system, a single input variable used fuzzy logic control (FLC)‐based MPPT method is developed. Therefore, this study investigates and analyzes energy recovery connected and fuzzy logic control‐based MPPT controlled PV system under partial shading conditions. Effectiveness of the proposed system has been verified through simulation and experimental results.

Section: Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single‐stage photovoltaic system design based on energy recovery and fuzzy logic control for partial shading condition

Kandemir

Çetin

Börekçi

2022

“…MPPT control mainly aims to track maximum power under certain environmental conditions such as solar radiation, ambient temperature, and cloud shading 51–53 . It requires an experimental prototype for the analysis of MPPT performance in terms of solar energy harvest for a long period of time.…”

Section: Experimental Evaluationsmentioning

confidence: 99%

“…MPPT control mainly aims to track maximum power under certain environmental conditions such as solar radiation, ambient temperature, and cloud shading. [51][52][53] It requires an experimental prototype for the analysis of MPPT performance in terms of solar energy harvest for a long period of time. In addition, long-term evaluation under natural sunlight is also essential to test the performance of an effective MPPT algorithm without exposure to side effects of power electronic-based PV simulators and artificial light sources.…”

Section: Experimental Evaluationsmentioning

confidence: 99%

Experimental evaluation of type‐2 fuzzy logic controller adapted to real environmental conditions for maximum power point tracking of solar energy systems

Ganı

Şekkeli

2022

The conventional angle of incremental conductance (AIC) method fails to track the maximum power point (MPP) when a rapid change in solar irradiation and/or panel temperature appears because it cannot distinguish between rapid changes in photovoltaic (PV) current and voltage under real environmental conditions. The present study describes setbacks of the conventional AIC method and proposes an effective approach based on the combination of AIC and type‐2 fuzzy. The proposed approach offers a significant advantage in terms of maximum power transfer to the load under long‐term weather patterns under which broken clouds appear frequently during a 40‐m testing period. The proposed approach is installed on 250 W module of a 10 kWp real PV plant in Kahramanmaras Sutcu Imam University. Later, its performance is validated by dSPACE1104 controller card operating in real time with MATLAB/Simulink tools using daily measured data. The experimental results obtained from the laboratory setup based on dSPACE1104 controller card demonstrate the facility and feasibility of the proposed approach for real PV plant with boost power converter and load.

“…As mentioned earlier, in the proposed hybrid system, a boost converter is used to step up the PV's voltage and capture the maximum power from the sun. In this study, the well-known Perturb and Observe approach, which is frequently being used in the literature, 26,27 is adopted. In this method, a predefined constant perturbation is applied to the voltage, which causes an output power variation of the PV array.…”

Section: Mpptmentioning

confidence: 99%

A new reactive power compensation concept for distribution systems using a grid‐integrated hybrid photovoltaic/wind turbine system: PV‐WT‐STATCOM

Akbari

Taheri

et al. 2022

In this paper, a new concept based on an integrated hybrid energy system including photovoltaic (PV) and wind turbine (WT) for reactive power support of the grid is presented. Considering the shared grid-side converter in hybrid energy systems, which is preferably responsible for delivering active power to the grid, the remaining capacity of the converter after providing active power management is utilized as a static synchronous compensator (STATCOM) to overcome the power quality problems in the main grid. For this aim, a new concept named PV-WT-STATCOM is proposed, and a flexible control scheme is accordingly designed, which enables a sufficient reactive power compensation in both steady and transient states. The steady-state issues in the main grid are resolved using the remaining capacity of the shared inverter. In the transient mode, where a large amount of reactive power is probably needed for restoring the grid-side voltage while the unoccupied capacity of the shared inverter is not sufficient, a new control strategy is developed for reducing the PV's generated power, and providing more unused capacity in the shared inverter. The effectiveness of the proposed configuration in handling reactive power compensation in both steady and transient states are carried out using MATLAB/Simulink. The extensive simulation results in presence of the variable weather conditions confirm that the proposed concept is properly able to improve grid-side power factor and voltage in steady and transient modes, respectively, without requiring any additional STATCOM.