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The photovoltaic system works in stand-alone or grid applications, where the operation at the maximum power point (mPP) of generation is required. Maximum Power Point Tracking (MPPT) algorithm allows increasing the output power and it works commonly with a DC-DC converter. This work shows a novel analysis and the basic features of response about different topologies of DC-DC converters with MPPT algorithms...
This paper proposes a improved hill climbing searching (HCS) maximum power point tracking (MPPT) control strategy for the dual power flow (DPF) wind energy conversion system (WECS) which is based on the electrical variable transmission (EVT). The proposed improved HCS MPPT strategy is developed based on the electrical power which is generated by the stator. The peak detection capability has been devised...
A photovoltaic (PV) generator is one of the primary power sources in a DC micro-grid (MG). The power generated by PV systems may inject high-order transient harmonics and low frequency ripple into the DC MG, especially if a conventional widely used Perturbation and Observation (P&O) maximum power point tracker is employed. In this paper a novel active filtering approach is proposed to improve...
This paper focuses on the relevant content of the MVDC-connected photovoltaic system based on the modular cascaded structure. This paper proposes a new topology for the DC grid-connected photovoltaic system with a novel capacitor voltage balancing control strategy, including the module input power ratio feed forward and module capacitor voltage closed-loop control. The proposed control strategy is...
Maximum power point tracking techniques play an important role in improving the efficiency of photovoltaic generation system. Among various schemes, the incremental conductance (INC) method is mostly discussed in literature because of its superb tracking ability in irradiance and temperature changes. However, because the conventional INC algorithms adopt a simple duty-cycle updating law that is mainly...
In this paper, a single inductor-single sensor based photovoltaic optimizer with an optimal current point tracking strategy is proposed. With only one inductor, one sensor and one MPPT unit, this optimizer can not only make all submodules output their individual maximum powers, but also utilize the least components compared with current solutions, greatly reducing the size and cost of photovoltaic...
This paper presents the implementation of a sensorless vector control scheme for a surface mounted Permanent Magnet Synchronous Generator (PMSG)-based Wind Energy Conversion System (WECS). This sensorless strategy is based on a sliding mode observer and a minimum order observer, which are used for estimating the position and the speed of the PMSG, respectively. The proposed sensorless scheme does...
Nowadays capacity of the photovoltaic systems in the grid is remarkable and provides a major part of energy in the grid. Therefore, an abruption of these systems from the grid can create a damage to the grid. Unlike in the past that PV systems disconnected from the grid when a voltage drop occurred, nowadays these systems should have Low Voltage Ride-Through (LVRT) capability. The PV system should...
A highly land-area-efficient solar array structure named “F Solar Package Type-M” was developed and evaluated based on the actual data in “F Nagara Solar Power Plant”. This package shows better power generation performance and return on investment than a conventional system configuration. A PV power plant using this package becomes more cost-effective and is expected to spread widely because the price...
Under partial shading condition or imbalanced temperature distribution, the power-voltage characteristic curve of photovoltaic (PV) array exhibits complicated multiple peaks. Traditional maximum power point tracking (MPPT) method is usually easy to trap into local extreme power point. To solve this issue, this paper proposes a novel MPPT method using quantum-behaved particle swarm optimization (QPSO)...
The performance of the photovoltaic panel is significantly affected by various environmental factors, due to these changes there is little chance to operate the PV module at its maximum power point when using Perturb and Observe (P&O) algorithm. Hence, an intelligent controller is designed employing ANFIS which draws much energy and fast response. The current work proposes an artificial-intelligence...
The paper presents a new MPPT method based on Golden-Section Optimization (GSO) technique for photovoltaic systems. The GSO-based MPPT converges to the MPP by interval shrinking. Initially, two points have been selected from the search space that is known, evaluated then a new point is accordingly generated. At given iteration the algorithm has a new narrowed interval bounded by the new point and...
This paper presents an improved stator active and reactive power control is proposed in wind system (WS) to control doubly fed induction generator (DFIG) in Hyposynchronous mode using maximum power point tracking (MPPT) strategy. A new class of fuzzy logic called an adaptive type-2 fuzzy logic control (T2-FLC) is proposed for wind generation application to control Ird and Irq instead the proportional...
This paper presents a new design of hybrid Petri net sliding mode control (PNSMC) applied to reach the maximum power point tracking (MPPT) of a variable speed wind energy conversion system. To solve the main and major undesired phenomenon faced by conventional sliding mode control, the high frequency oscillations known as chattering, the design of a hybrid controller based on Petri network sliding...
This paper describes a PV system supplying a large scale interconnected grid. A PV array is connected to AC grid via a DC-DC boost converter and a three-phase three-level Voltage Source Converter (VSC). Maximum Power Point Tracking (MPPT) is implemented in the boost converter by means of a Simulink model using sliding mode controller by switching the duty cycle of the boost converter. A three phase...
A robust sliding mode controller (SMC) for a grid-connected photovoltaic inverter is proposed in this paper. The objective of the control is to force both the output voltage of the PV source and the grid power factor at the inverter output to follow a certain trajectory reference. The robust sliding mode controller is applied directly to the nonlinear state model of the system composed by the PV source...
The paper presents new trends in the development photovoltaic (PV) power plants, with particular reference on new inverter concept with DC-link voltage over 1000 V. For the inverters with the DC-link voltage reaching the value of 1500 V, basic and most important features will be presented. The principle of appropriate PV panel configuration selection in accordance with the inverter voltage input level...
This article presents an approach to use fuzzy logic multi-agents for standalone system E.M.S, in the sense of renewable energy environment. The multi-agent approach is useful to be adapted in a system of hybrid energy particularly in the field of renewable energy; however managing the energy in such a scheme is likely to be complicated in the perspective of a central controller. Consequently to have...
A fuzzy-PI combined control algorithm for the maximum power point tracking (MPPT) of photovoltaic (PV) array is proposed in this paper. Aiming at the limitation of single PI or fuzzy control algorithm for MPPT, traditional PI and fuzzy control algorithm is combined to the fuzzy-PI algorithm. In the combined algorithm, when the tracking error is great, a fuzzy controller is used to adjust quickly and...
This paper presents a fast distributed maximum power point tracking (MPPT) to minimize the power loss during high transient mismatching occurrence of each PV solar module. The developed MPPT system employs a hybrid combination of direct and indirect method with integrated of soft-computation algorithm approach for maximum harvested energy of photovoltaic system. The MPPT algorithm supported by Particle...
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