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The MPSS (multiport power supply system) is consist of fuel cell, super capacitor and two DC/DC converters. The energy management scheme, along with the allocation principle of energy storage unit is analyzed. The paper establishes the mathematical model and proposes a composite control strategy. The strategy fuses subsection PI (Proportional and Integral) control and SMC (Sliding Mode Control) based...
This paper presents a stand-alone hybrid PV/fuel cell system using single-inductor dual-input single-output (SI-DISO) boost converter. Compared to conventional hybrid power system, the proposed system significantly reduce the number of components, the system size and the corresponding cost. A model predictive control (MPC) method has been developed to control the SI-DISO boost converter to achieve...
In this paper, the control and energy management strategy are proposed for an electric vehicle (EV) application. The hybrid source is composed of Fuel Cell (FC) and Ultracapacitors (UCs). The proposed energy management is used to share the EV energy requirement between the hybrid energy source, where the UCs are connected to DC-bus through a bidirectional DC/DC converter, and the FC is linked to the...
Fuel cell is an attractive alternative to generate clean electricity for many industrial applications. This paper discusses model predictive control (MPC) of a fuel cell-based power unit (FC-PU) for vehicular applications. The MPC improves the transient response of the FC-PU. In this FC-PU, a unidirectional converter controls the current of a proton exchange membrane (PEM) fuel cell, and a bidirectional...
To solve the issues of the open-loop control accuracy in a proton exchange membrane (PEM) fuel cell power conditioning system (PCS) with active clamp push-pull DC/DC converter for input current ripple reduction, a novel closed-loop digital-controlled method is proposed. The proposed PEM fuel cell PCS consists of a high-efficiency high-step-up current-fed resonant push-pull DC/DC converter and a half-bridge...
Nowadays, the diffusion of renewable energy sources and electric vehicles are turning the traditional passive distribution networks into active grids, requiring Distribution Management System (DMS) to exploit Information and Communication Technology (ICT) improvements to get a smarter control through wider communication and local monitoring. In this paper, a Mixed-Integer Linear Programming (MILP)...
Fuel cells (FCs) are typically low-voltage sources, they are connected in stack structures to increase the operating rate voltage. An efficient DC-DC converter is needed as interface between FCs source and a constant dc bus. In this paper a different approach is proposed. Single cells are individually considered in a connection with an suitable DC-DC converter to provide the overall stack voltage...
In today's era of renewable energy, hydrogen fueled proton exchange membrane (PEM) fuel cells are considered as an important source of clean energy. As the technology is emerging fast, many universities and colleges have adopted fuel cells in their educational program. In this paper, we will present the modeling and control of the fuel cell pilot plant present in Clean Energy Trainer, which is used...
This paper treats a control strategy for obtaining an energy management system for average power electrical vehicles. A very important system from an electrical vehicle is represented by the power supply system which can be composed of at least two are more sources like fuel cell, battery and ultra-capacitor as example and an energy management system is needed in order to satisfy power demand of the...
Compared with traditional inverters (VSI & CSI) family, Z source topology has feasible merits of less component count, single stage conversion and boosting of voltage which opens the path to various applications particularly in distributed generation system with renewable & alternative energy source. This paper presents the review of role of Quasi inverter in renewable energy system, as this...
There are some limitations during the interconnection of fuel cells (FCs) to the utility grid. The output voltage of fuel cell is low and unregulated DC. It should be boosted and inverted before connecting to the grid. Because of the slow response time of chemical processes in FCs, a suitable power conversion unit is needed which improves the dynamic response of the system during interconnection with...
This paper presents a new method for operating microgrid. Basic control methodology is to de-couple PQ control for grid-forming distributed generator (DG) whose new extra role is to act as reactive power sensor besides generating real power into the microgrid. Reactive power from the grid-forming DG is transferred to and from the instantaneous var compensator when there is a switch-in or switch-off...
Alternative energy systems (AES) are becoming popular for small scale power generation. Designing the converters which transform the DC power into AC is the main development area of AES. Conventional single-phase voltage source inverter (VSI) uses buck topology which gives lower average output voltage than the input DC voltage. However, where the output voltage requirement is larger than the input...
This paper presents a novel strategy for a hybrid energy management system consisting of a photovoltaic (PV) array, a polymer electrolyte membrane fuel cell (PEM-FC) as energy sources and Lithium ion (Li-ion) battery as an auxiliary energy storage. Such hybrid combination brings the reliability, redundancy and an overall energy efficiency in the system. DC-DC converters are used to interface PV-FC-battery...
This paper proposes a new power management strategy based on pq-Theory for fuel cell and electric vehicle applications. Using a modular cascaded converter topology, more than one power source could be combined with capacitors to supply active and reactive power in an efficient manner to the electric motor. The control strategy to separate mean and oscillating active power and reactive power, as well...
In this paper, an energy management system is developed for fuel cell/supercapacitor hybrid locomotive, and an energy management strategy based on high hydrogen efficiency mode is proposed to satisfy the demand of dynamic performance of hybrid locomotive. Moreover, the energy management system is designed and is verified by reduced-scale experiments. The results demonstrate that the proposed energy...
Integration of renewable energy in residential applications is one of the most promising options to reduce the impact of human activities on the environment. Residential loads are AC loads with high variations generating low-frequency ripples that can harm the sources especially the fuel cell. This paper investigates the use of a neural network algorithm to control a power converter for fuel cell...
In this paper, an adaptive network based fuzzy inference system (ANFIS) terminal sliding (TS) mode) controller is suggested for improving the reactive power and overall stability. This ANFIS control system consists of an ANFIS controller and a TS controller which is designed to do as a main controller and the TS controller is designed to cope with disturbances and uncertainties. Small signal model...
Energy storage in the form of electrolytic Hydrogen can play an important role for integration of intermittent renewable energy sources in the smart grid environment. Electrolytic Hydrogen can be used as a fuel in proton exchange membrane (PEM) fuel cell. In this work, a technique for multiphase switching of a DC-DC converter associated with grid integration of a PEM fuel cell stack for maximum power...
In this paper a novel droop approach for power management in low voltage dc MicroGrids (MGs) based on a master-slave concept is presented. A virtual frequency is injected by a master unit, which is proportional to its output power. Other slave units determine their output power according to the corresponding frequency based droop characteristics. Unlike the dc voltage-droop methods, the proposed virtual...
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