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This paper proposes the modeling and simulation model of 10 MW grid connected PV based solar power plant on Matlab Simulink R2014a. In today's world where pollution is also a big problem along with the energy crisis, we need to find ways to meet the energy requirements and at the same tie keeping the environment pollution free and clean. Energy from the sun if harvested with proper techniques can...
In this paper a single phase grid-connected photovoltaic converter with maximum power point tracking algorithm is presented. This system is characterized by high efficiency and good output quality parameters of electrical energy. The implemented inverter operates in current tracking controller mode. The output current (current of grid) is almost sinusoidal and the reactive power is equal to zero....
With the high penetration of distributed photovoltaic(PV) generations in low voltage (LV) distribution network, it causes overvoltage in feeder. Therefore, in this paper, impaction on voltage in radial LV grid for distributed PV generations is analyzed. Local voltage self-regulating control strategy of each PV converter to prevent overvoltage and improve the high permeability is proposed. The PV converter...
In this paper a balancing control of the dc input voltage of a 3-Level and 5-Level Neutral Point Clamped Inverters (3L-npc and 5L-npc) is proposed. In renewable applications and injection to AC bus, are often used boost converters and inverter. The proposed control allows independent MPPT for each source in a Distributed-MPPT (DMPPT) configuration. It is known that the DMMPT offers improvements in...
In the recent years growing interest has been given to photovoltaic (PV) microinverters. Sub-modular optimization of PV panels where the junction-box of the panel is removed and each sub-modules is connected to an individual DC-DC converter realizing independent MPPT is one promising solution especially for systems subject to partial shading. In this paper, individual flyback DC-DC converters are...
A two-stage converter working in dual mode time sharing is proposed for single-phase photovoltaic applications. The converter encompasses a dual boost front end and a single-phase three-level Neutral Point Clamped grid inverter. According to the time sharing strategy, the boost stage is by-passed and only the Neutral Point Clamped inverter is operated when the input voltage is greater than the actual...
This paper demonstrates a comparative study of two well-known Maximum Power Point Tracking (MPPT) algorithms in photovoltaic (PV) plants based on Modular Multilevel Converter (MMC). The Perturb and Observe (P&O) technique which is widely deployed throughout industry is considered for the comparison evaluation together with the Ripple Correlation Control (RCC) strategy. The efficiency of entire...
Africa is the major world region in which populations are deeply affected by water and electricity supply shortages, in spite being blessed with the highest world water aquifer reserves as well as advantageous solar irradiance that encourages harvesting of electricity using photovoltaic cells. This paper deals with the design and performances analysis of a three phase Quasi Z Source Inverter (QZSI)...
Solar Photovoltaic (PV) inverters are used to feed power to the grid. These PV inverters are equipped with anti islanding protection technique. As the PV penetration in the grid increases, this feature would affect the operation and reliability of grid during fault conditions. Thus, Low Voltage Ride Through (LVRT) capability is suggested for PV inverters connected to High Voltage (HV) and Medium Voltage...
A good design of a photovoltaic power system is based on the use of efficient PV converters and fast and accurate maximum power point tracking (MPPT) algorithms to extract maximum energy from existing irradiance under different weather conditions. The typical configuration of a PV system for PV power plants is to use high-power central inverters (500 kilowatts each typically) and the MPPT method performance...
To interconnect solar photovoltaic (PV) with the single phase grid, DC/AC inverters are used as interface. For tracking maximum power from each solar PV string, DC/DC converters are connected between solar PV strings and inverters. This ensures each strings operates at its maximum power output irrespective of variation in solar radiation among different strings. Conventionally, DC-DC converter used...
A hydrokinetic smart grid (KSG) concept powered by modules of hydrokinetic microturbines arranged in rows is proposed in this work. A complete description of each module: mechanical design, hydropower characteristics, power electronics and control strategies have been included. A complete dynamic simulation of an example of a KSG has been performed. It considers microturbine modules, power loads,...
The objective of this paper presents a photovoltaic (PV) water pumping system with a maximum power point tracking (MPPT). The water pumping system uses a variable speed three-phase induction motor driven a centrifugal pump by the V/ƒ control inverter. By only regulated the photovoltaic voltage, the MPPT algorithm is very simple under different insolation conditions. The experimental results shown...
The massive penetration of renewable energy sources in the utility grid has emerged as the solution to obtain clean energy in modern electric systems, which are gradually replacing their generators that produce CO2 emissions to achieve a sustainable growing. Power electronics is quite relevant in the deep penetration of renewable energy, because the use of such equipment is mandatory to integrate...
The present work deals with a nonlinear control strategy for the purpose of photovoltaic (PV) systems integration into the power system through cascaded Z-source H-bridge inverters. The topology of the proposed system which is able to obtain a 5-level voltage is discussed. To facilitate a systematic voltage control, an exact nonlinear model of the proposed system is presented. A nonlinear voltage...
The research object is the Single-phase photovoltaic (pv) grid inverter based on the household, and adopt the DC/DC/AC two level conversion circuit topology. This paper studies the maximum power point tracking of photovoltaic power generation units and booster function for the Former level conversion circuit, and studies the DC bus voltage stability and interconnection of the same frequency and phase...
Multilevel inverter units for stand-alone solar photovoltaic systems are gaining popularity in the present industrial environment. The number of switching devices, total harmonic distortion, number of output levels and number of sources are the governing factors in a multilevel inverter topology. The classical multilevel inverter topologies produce a considerable amount of switching losses due to...
This paper presents a Finite State Machine (FSM) model of a photovoltaic (PV) power plant consisting of a PV array, a DC boost converter with maximum power point tracking and a grid-tie voltage source converter with a phase-locked loop controller. The FSM approach is used to represent different states of the PV power plant. Such an arrangement enables a simulation time to be reduced, while at the...
Distributed Energy Resources (DERs) are increasingly becoming a key player in meeting customer power demand in many countries today. Distributed Generation (DG) interconnection of DERs in both grid connected and microgrid modes allows the coordination of DERs in a manner such that they can supply both active power and ancillary services when required. This paper presents a strategy for coordinated...
Sensitivity is one of the important objectives for any kind of dynamic system. Dealing with disturbances from environment, depends upon the system sensitivity. This becomes far more important when the system is non-linear one. Behavior of a non-linear dynamic system is complex to predict, on the aspect of environmental as well as for in bound disturbances. The complexity proportionally related to...
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