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Variable Pipeline Cool Mega Array (VPCMA) is an low power Coarse Grained Reconfigurable Architecture (CGRA) based on the concept of CMA (Cool Mega Array). It implements a pipeline structure that can be configured depending on performance requirements, and the silicon on thin buried oxide (SOTB) technology that allows to control its body bias voltage to balance performance and leakage power. In this...
This paper presents a Maximum Power Point Tracking (MPPT) method applying an Adaptive Neuro-Fuzzy Inference System (ANFIS) for a stand-alone photovoltaic (PV) system. The proposed ANFIS-based MPPT technique determines the optimal operating point of a PV system which is designed in conjunction with a Z-source DC-DC converter as an interface between the PV array and the load. In the ANFIS-based MPPT...
Disk data density improvement will eventually be limited by the super-paramagnetic effect for perpendicular magnetic recording. Of the various new technologies being explored, Shingled Magnetic Recording (SMR) exposes as the most promising one to achieve high areal density and only make little changes to the manufacturing process. At present, high-capacity SMR drives are available from Seagate and...
The world's growing energy demand raises two challenges: climate change and energy security, and developing renewable energy has become common choice of the world to deal with the challenges. Solar energy is the largest available energy resource on earth so far, photovoltaic system has advantages of flexible installation, easy maintenance, environment friendly, so it receives attention of the world,...
The paper presents a study for the impacts of solar energy integration on the power system dynamic stability. A detailed photovoltaic model incorporated active and reactive power controller is used to investigate the effect of replacement of conventional steam power station by solar system considering changing in size and location. The controller depends on decoupled inner d-q current control loops...
In this paper, two approaches based on sliding mode control for controlling a single-stage grid-connected three-phase solar photovoltaic system have been presented. The sliding mode control is robust and has good disturbance rejection as compared to the conventional proportional-integral control. Another advantage is that feedback linearization is not required for controlling nonlinear systems. There...
In this paper, a grid-connected version of the switched PV array will be presented. The PV array consists of n parallel-connected strings and m series-connected modules per string, i.e. an array with a dimension of (m × n). Using the proposed switched PV approach, each string can be reconfigured to form two parallel strings of m/2 modules per string resulting in a new array with a dimension of (m/2...
With the advent of PoL (Point of Load) technology, several commercial integrated switching regulators already have their space-qualified versions. Apart of its original purpose, other functions can be explored using those integrated circuits. In this work, Solar Array Regulation with Global Maximum Power Point capability is analyzed. Maximum power tracking and input voltage regulation have been studied...
In this paper, a single stage highly efficient photovoltaic grid interconnected charging infrastructure has been designed for off-board DC charging for electric vehicles. This paper starts with the design of a single phase H-bridge quasi-z-source inverter (qZSI), component design and the pulse width modulation technique used. Then it discusses the control techniques used to control the power flow...
This paper proposes a control strategy for a single-stage, three-phase photovoltaic (PV) system connected to a distribution network. The control entails obtaining the maximum power point of the PV system by means of a control strategy that is based on an inner current-control loop and an outer DC-link voltage regulator. The current-control mechanism decouples the PV system dynamic from those of the...
In this paper, Distribution Static Compensator (DSTATCOM) is proposed for load compensation using photovoltaic (PV) array and Permanent Magnet Synchronous Generator (PMSG) based wind turbine for dc generation; forming hybrid renewable energy sources based dc-link voltage source inverter (VSI). PV is installed along with Perturb and Observe (P & O) maximum power point tracking (MPPT) method applied...
Due to the rapid increase of nonlinear and unbalanced reactive loads in 4-wire distribution systems, various power quality issues such as harmonics current, unbalanced load currents, neutral current and low power factor occur. The need for green and renewable energy sources increases daily due to increase in demand for electrical power. Photovoltaic (PV) energy is an important renewable technology...
As the transformerless solar inverters have been pushed to an impressive 99% efficiency in residential and small commercial applications (less than 20 kW), high efficiency medium and large commercial scale (50–250 kW) transformerless solar inverters are gaining more and more attentions. However, due to the differences of inverter power ratings, grid voltages and standard requirements, there are new...
The current trend in isolated microgrids is oriented to distributed renewable energy generators, such as photovoltaic (PV) generators and their corresponding distributed energy storage systems (ESS) as an unit denoted as active generator (PV+ESS). In an isolated microgrid, every distributed generator (ESS or PV) may operate in two operation modes (grid-forming or grid-following) in accordance to specific...
Photovoltaic module connection/disconnection, cell mismatching or partial cell shading are problems that can occur in DC microgrids with several photovoltaic modules. The bus voltage regulation can be compromised when the microgrid does not contain storage elements and are affected by a trouble in energy sources; therefore, appropriate control strategies are required. This paper presents a new multi-model...
In this paper, we propose a concept of Field Programmable Power supply Array (FPPA), which is a fully digital controlled power supply, based on power supply on chip technology. The FPPA realize multi input voltage and multi output voltage only rewrite digital code of FPGA or DSP.
A phase-locked loop (PLL) array has been developed to perform electronic beam steering at W-band (76–77 GHz) for radar applications. It uses external current injection into the outputs of the charge pump (CP) in the frequency synthesizers to adjust the phase of the voltage control oscillators (VCO) in the PLL array. The measurement array radiation pattern is presented.
A boost-buck (BB) DC-DC converter is proposed for solar photovoltaic (SPV) array fed water pumping system using a permanent magnet brushless DC (BLDC) motor drive. To design a BB converter with suitable voltage control, DC-DC boost and buck converters are cascaded such that it accomplishes the purpose of maximum power point tracking (MPPT) and soft starting of the BLDC motor. The BB converter exhibits...
Combining a storage device and renewable generation is one of the viable solutions to deal with the intermittency of renewable energy sources. Conventional methods of combining these components involve multistage and single-stage converters. However, there is a trade-off between efficiency and component count. A novel non-isolated three-port DC-DC converter which combines a dual-input single output...
A standalone microgrid system consisting of a solar photovoltaic (SPV) array, diesel engine driven permanent magnet synchronous generator (PMSG) and a battery energy storage system (BESS) is analyzed with a composite observer (CO) based control methodology. The PV array fed boost converter is controlled for providing the maximum power of the SPV array at any given temperature and insolation level...
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