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This paper presents a three-phase six-level Asymmetrical Hybrid Multi-Level Photovoltaic Inverter (AHMLPI) for medium voltage grid connected applications. A Low to Medium Voltage Transformer is operated in an open-end winding configuration. Thus the low voltage winding is supplied on one end by a three-phase three-level Neutral Point Clamped Inverter (NPC) and, on the other side, by an auxiliary Two-Level...
In this paper the implementation of maximum power point tracking (MPPT) schemes by the ripple correlation control (RCC) algorithm is discussed in case of multiple ripple harmonics. As an example, a single-phase single-stage grid-connected photovoltaic (PV) system based on H-bridge inverter and level doubling network (LDN) is considered, leading to a multilevel inverter having the double of output...
This paper considers a three-phase grid-connected photovoltaic (GCPV) system, which comprises a 120kW PV farm connected to the grid through a step-up transformer. GCPV is considered as a distributed generation (DG) serving a variable local load (LL) connected to the low voltage side of the transformer. A power conditioning unit (PCU) consisting of a two-stage energy conversion device is used to (i)...
For high PV penetration, grid ancillary services such as dynamic voltage support and low-voltage ride-through (LVRT) operation are recommended by network operators. This paper proposes an integrated controller for LVRT capability of a three-phase grid-tied PV system connected to a LV grid. Generally X/R ratio is low for LV grids, therefore the active power injection is given higher priority than the...
As the penetration level of grid-connected Photovoltaic (PV) systems increases, the power quality is one of the major concerns for system operators and the demands are becoming even stricter. The impact of interharmonics on the grid has been acknowledged in recent research when considering a large-scale adoption of PV inverters. However, the origins of interharmonics remain unclear. Thus, this paper...
This paper presents the modelling and control of a grid-connected PV system in LabVIEW environment. The proposed control system provides interactivity with the grid: the control system features communication with the grid operator and thus it is able to operate either in maximum power point tracking (MPPT) or in limited power point tracking (LPPT). The second is useful in certain cases when there...
Introduced the basic principle of photovoltaic, and describes the development significance that photovoltaic brings to each field such as technology, industry, domestic and foreign. The development of PV technology at home and abroad are mainly demonstrated. Due to the radomness and discontinuity of the output of photovoltaic generation, maximum power point tracking (MPPT) has always been the hot...
In the context of the increasing energy demand, renewable energy sources such as solar irradiation represent a much cheaper alternative for electrical energy production. The efficiency of solar energy conversion is influenced by photovoltaic cell performance and by power processing system. The power processing systems are designed to maximize the generated electrical power based on maximum power point...
This paper presents the operation of a grid-tied photovoltaic power generator considering a two stages configuration for active power injection. A Neutral Point Clamped Inverter (NPC Inverter) was used for the DC-AC conversion and a DC-DC Boost converter complemented the system configuration. The control system includes the following loops: a maximum power point tracking algorithm, a DC bus voltage...
Photovoltaic power generation system has been increasing in term of installed capacity in the last few decades. With recent policy in Thailand that support people to invest in renewable energy in household with solar rooftop program. It is important to analyze the performance of solar rooftop PV generating system in residential sector. In this paper present simulation of Photovoltaic (PV) Grid-connected...
This paper deals with the design of the SEPIC converter is connected to permanent magnet Brushless Direct Current motor through VSI (voltage source inverter). The SEPIC converter values has been designed based upon the transfer function and the input is get from the Renewable Energy Source as Solar PV cells. The Maximum power should be extracting by using perturb and observe technique. The ripples...
Solar Photovoltaic system plays an important role in power generation system. The output power produced in the photovoltaic modules relies on upon solar radiation and temperature of the solar cells. In this paper an utilization of sliding mode control technique is connected to track maximum power of photovoltaic cells. This usage depends on grid connected dc to dc switching converter. This is typically...
This paper is proposed to convert the Solar PV DC voltage into AC voltage by using 3 phase inverter and getting sinusoidal AC output voltage. To convert solar PV which is in DC needs to be converted into AC by using the devices like 3 phase inverter and boost converter. The solar PV is a variable DC that is to be converted into pure DC for which will convert variable DC to pure DC. The MPPT is designed...
Nowadays tendency of using renewable source is increasing due to environmental friendly nature of it and its economic benefits. One of the commons renewable sources is Photovoltaic (PV) system. Before utilizing PV system, operation of system in different conditions should be simulated in order to ensure stability and efficiency. This paper analyzed and simulated a PV system and observed the impact...
This work presents the overall architecture and main components of an experimental smart microgrid. These are part of a research and development project, which includes aspects such as the design and implementation of power and protection equipments (e.g. power electronics converters and static switches), the development of energy market strategies, regulatory issues, control and dispatch optimization...
A photovoltaic (PV) source is reliable and emission free. The benefits of the micro-grid include high reliability. Therefore, a micro-grid connected PV system is a feasible source for electricity. However, nowadays the efficiency of a PV array is remains low. In the proposed MPPT algorithm, it was very simple under changing light intensity by only regulating the photovoltaic voltage. The control method...
This paper describes solar PV system worn for pumping system in order to gain the maximum benefits from solar source along with also gives soft starting of BLDC motor. The model is inured study manifold parameter alternative effects upon the PV array in conjunction with operating temperature along with solar irradiation level. This paper accommodates an analysis regarding the photovoltaic system's...
Non-uniform operating conditions for photovoltaic (PV) modules of the PV array, especially the different irradiation levels received by the modules, greatly affect the energy yield of the PV system. This paper compares different avenues by which the energy yield of grid-connected PV system can be increased. The effect of some common array configurations, the level of distributed maximum power point...
The renewable energy sources like wind, solar, and fuel cell sources has widely used in the smart gird to reduce the power loss in the conventional central generation. However, these sources usually operated at low output voltage levels. This paper proposes single phase bidirectional inverter is used for voltage regulation which gives less voltage ripple. Proposed quasi - Y source converter has many...
This paper presents a modeling and simulation, in Matlab/Simulink environment, of a stand-alone solar PV system in order to analyse its performance under irradiation and load variations. Indeed, to supply an alternative load with a sinusoidal line without harmonic distortion under weather conditions, a MPPT (Maximum Power Point Tracking) algorithm has used to control a DC-DC boost converter to generate...
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