An efficient way of synthesizing a three port non-isolated converter from a single-ended primary inductor converter (SEPIC) is proposed in this paper. The primary SEPIC converter is split into a source cell and a load cell. Two such source cells are integrated through direct current (DC) link capacitors with a common load cell to generate a three-port SEPIC converter. The derived converter features single-stage power conversion with reduced structural complexity and bidirectional power flow capability. For bidirectional power flow, it incorporates a battery along with an auxiliary photovoltaic source. Mathematical analyses were carried out to describe the operating principles and design considerations. Experiments were performed on an in-house-built prototype three-port unidirectional converter, and the results are presented to validate the feasibility of the designed converter.
<p class="Normal1">In this paper, a Matlab based GUI and Propotinal Integral Dervative (PID) controller is designed to automatically regulate the flow-rate of the circulating fluid. When fluids are transported over long distances, the pressure and flow rate have to be monitored remotely in a control room. Using an HMI or Control Panels the flow rate can be increased or decreased to compensate for pressure drops or disturbances. This paper attempts to demonstrate such an Industrial Control Operation in a scaled-down environment. A Graphical User Interface or GUI is constructed which enables the Operator to monitor, as well as control an electronically actuated Control Valve which can efficiently regulate the flow-rate. Automatic operations have also been implemented using a PID controller algorithm, which tries to track the Set-point in Real-time.</p>
Abstract:A non-isolated Multiport Single Ended Primary Inductor Converter (SEPIC) for coordinating photovoltaic sources is developed in this paper. The proposed multiport converter topologies comprise a Single Input Multi yield (SIMO) and Multi Input Multi Output (MIMO). It is having the merits of decreased number of parts and high power density. Steady state analysis verifies the improved situation of both the proposed topologies, which is further checked through simulation results.Keywords: single input multi output; multi input multi output; single ended primary inductor converter
This paper proposes a variable frequency transformer for wind energy conversion systems using permanent magnet synchronous generator. It is a doubled-fed wound round induction machine which transfers the power between asynchronous networks. Typical permanent magnet synchronous generator-based wind energy conversion systems with back-to-back converters produces harmonics which creates power quality problems.The above problem can be overcome using the variable frequency transformer between permanent magnet synchronous generator and load. This design does not employ any power electronic converter for wind energy conversion system and harmonics can be diminished using the variable frequency transformer. In this paper, the PMSG is connected through variable frequency transformer for different wind speeds. The results are endorsed using MATLAB/SIMULINK.
<p>This paper proposes a non-isolated three port SEPIC converter for stand-alone photovoltaic applications. The proposed topology uses the Single Input Multi Output (SIMO) structure. This topology consists of a single photovoltaic source as input and it is a unidirectional power converter. Mathematical analysis for the proposed system is performed and simulations are carried out using MATLAB/Simulink. The design parameters of capacitors and inductors are calculated from small ripple analysis. The simulation analysis for the proposed open loop topology is verified using a real time hardware setup.The entire process is carried out in Continuous Current Mode (CCM) of operation. The experimental results for hardware are verified with simulations and compared.</p>
techniques like EGR, changing the injection pressure of fuel into the combustion chamber etc., It is a well known fact that as the injection pressure of fuel increases, the mass flow rate of fuel will vary for proper mixing of fuel and air in the combustion chamber. In the present work, it is proposed to investigate the effect of variations in injection pressure on emissions and for this STAR-CD will be used as a tool. To aid the setup of these calculations, visualization and interpretation of results, CD -Adapco has developed a pre and postprocessor environment, es-ice which is a special tool in STAR-CD solver which will be used for this analysis.The performance and emission characteristics were presented graphically and concluded that they were found better at the fuel injection pressure 200 bar for the light duty engine.
Summary
An extendable triple‐port single‐ended primary‐inductor converter (SEPIC)–SEPIC (TPSS) converter is proposed as a compact and efficient multiport interface, with less number of components for integrating RES in a microgrid system. It accommodates two power sources at the input to supply continuous power to a DC load, simultaneously or independently. The presented converter features high efficiency, unidirectional power flow, continuous current at all input ports, and single‐stage power conversion between input sources and the load port. Both input ports share an output inductor reducing the number of active and passive components. There is continuous current at all the input ports, hence less power loss. The operation modes are presented, and various states of operation are discussed using the equivalent circuits. The TPSS converter is simulated using MATLAB/Simulink. The laboratory prototype of the designed TPSS converter is tested successfully. A performance comparison between the proposed converter and other recent converters is made to show its merits.
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