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This paper proposes a new control method for two stage converters to realize the virtual synchronous generator (VSG) operation, which also can help eliminate circulating power between energy storage (ES) converters. It is proven in this paper that the proposed method shares stronger resemblances with synchronous generators (SGs) than traditional VSG in aspects of power conversion process and mathematical...
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...
A crude oil production and shipping terminal was built and expanded over time such that the facility was powered by three isolated power systems. These separate plants have since been interconnected to permit the sharing of generation reserves. Initially, the interconnected system was supervised by a power management system (PMS) that relied on isochronous operation of one power plant for frequency...
On-site small-scale electricity generation through a cluster of micro-sources with their local loads known as, microgrid has attracted significant attention as an alternative to traditional centralized power generation plants. The advantage of microgrid lies in its capability to work in stand-alone (island) and grid-connected mode. During the transition from grid-connected mode to island mode, there...
To improve the dynamic performance and the anti-disturbance capability of the photovoltaic energy storage system, a control strategy of the bidirectional DC-DC converter based on Linear Active Disturbance Rejection Control (LADRC) is proposed in this paper. Firstly, the mathematical model of the bidirectional DC-DC converter is established. And then, the double closed-loop control strategy based on...
This paper presents an energy function-based optimal control strategy for output stabilization of integrated doubly fed induction generator (DFIG)-flywheel energy storage architecture to keep the grid power isolated from wind power output and voltage fluctuations and thus enabling increased penetration of wind energy resources. First, a grid connected two mass DFIG and a grid supportive single mass...
One of the most widely used flexible ac transmission systems (FACTS) devices is unified power flow controller (UPFC) to increase the transmission capacity and enhancement of the power system stability. The effect of the UPFC in electrical power system for power flow control is presented in this paper. Phasor model of UPFC is used. All the simulations for this work have been carried out using MATLAB/SIMULINK...
In this paper the switched reluctance generator (SRG) is explored considering the improvement of its efficiency. This machine generates a DC power that is directly related to input driving parameters. Simulation results are presented bringing a case study of parametric regression to track the best efficiency for any input parameters: excitation voltage and turn off angle. A method known as parametric...
This paper presents an intelligent droop control scheme for DC/DC Boost converter which is used as voltage regulator in islanded DC Microgrid. This approach is a combination of Fuzzy Inference System (FIS) and Genetic Algorithm (GA) which is used to improve voltage regulation and equal power sharing between the DGs under abrupt load changing while the power losses is low. The propose control performance...
This paper proposes a dual input high step-up boost converter for grid-connected photovoltaic power generation system. Four different DC-DC converters are considered for analysis. From the result of the analysis, the converter with reduced component count and current ripple is identified and proposed for the grid connected PV power generation system. Next, the mode of operation of the proposed converter...
In this paper, a three-phase 12/8 switched reluctance generator is taken as the study object and a control system based on that generator is designed. In that system, the digital signal controller applied for is dsPIC30F6010, and power converter circuit adopt asymmetric half-bridge topology, and the main switches use power MOSFET. The paper analyzes the process of power generation and the basic structure...
In this paper a novel three stage control for squirrel cage induction generator (SCIG) fed to standalone system through back to back converter is presented. In the proposed technique dc bus voltage controller is implemented to regulate the output voltage of the stand alone system. The voltage controller is generating the speed command of the speed controller followed by inner current controller. The...
The well-known droop controlled parallel voltage source inverters are widely used in islanded microgrids to realize proportional power sharing based on ratings. However, when considering different loss characteristics of inverters, traditional droop control method is not an optimal power allocation scheme. This paper proposed a novel hierarchical operation strategy to realize overall efficiency optimization...
Since the wave energy power generation has a low voltage output and poor stability in low speed, the scheme of a compensation power generation scheme of two bilateral asymmetric linear switched reluctance generators (BALSRG) is proposed. The mathematic model of the BALSRG is derived and machine characteristics are investigated. Two control methods are discussed and compared. Experiment results demonstrate...
Since the wave energy power generation has a low voltage output and poor stability in low speed, the scheme of a compensation power generation scheme of two bilateral asymmetric linear switched reluctance generators (BALSRG) is proposed. The mathematic model of the BALSRG is derived and machine characteristics are investigated. Two control methods are discussed and compared. Experiment results demonstrate...
In this paper, an efficient light emitting-diode (LED) lamp driver circuit for high power applications with a dimming feature is proposed. It consists of an LC series resonant converter in series with a DC bus. The idea is to supply the threshold voltage from a constant DC bus and control the voltage for regulating current with an LC series resonant converter. Since voltage responsible for current...
In this paper, the optimum operation of two winding single phase self-excited induction generator has been investigated with different capacitor topologies. The optimum values of the capacitors for different configurations are obtained using the genetic algorithm for optimum voltage regulation. The optimization is carried out under MATLAB where fsolve is used to find the magnetizing reactance and...
In this paper, the optimum operation of single winding single phase self-excited induction generator has been investigated with series and shunt capacitor configurations. The optimum capacitors values for different configurations are obtained using the genetic algorithm for optimum voltage regulation. The optimization is carried out under MATLAB where fsolve is used to find the magnetizing reactance...
There are two unbalanced conditions for cascaded converter in Renewable Energy Source (RES) system. One is from the different output power of RES in bridge cells, and the other is grid voltage unbalanced fault. This paper presents a flexible voltage control technique of Modular Multilevel Cascaded Converter with single-delta bridge cells (MMCC-SDBC) in the RES system for maintaining the stable operation...
Fuel cell (FC) is one of the most suitable candidates for distributed generation system either in standalone or grid connected mode. Due to the cleanness, modularity and higher potentiality, FC systems can be used in both single and hybrid systems for power generation. In this study a 26 kW standalone proton exchange membrane fuel cell (PEMFC) based energy system is developed using MATLAB/Simulink®...
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