Abstract
A DC-distributed power system consists of a large quantity of subsystems with power converters. The interaction among these subsystems will affect the operation performance of the whole system. Therefore, data communication plays a very important role in system control and equipment monitoring. The present study proposes a dual modulation method of power/signal based on Switched Reluctance Drive (SRD), which can transmit signals simultaneously with power conversion and can promise data communication of the system with lower cost. This proposed method uses the ripple inherent as the carrier of the signal in the power circuit and adopts Pulse width modulation (PWM)/frequency shift keying (FSK) composite modulation to realize the reverse transmission of signals from the load to the power supply. Results of simulations and experiments indicate that this new method is effective in data communication.
Highlights
Energy is considered as necessary support in modern technological and industrial progress [1,2].Among multiple attempts that aim at optimizing the energy efficiency and developing new energy, much attention of researchers has been given to distributed power generation technology and its application in a micro-grid.Distributed power generation [3] is a small-scale power generation built near power users and relies on scattered energy for power generation, with its output ranging from several kilowatts to hundreds of megawatts
The former focuses on the production of electrical energy, while the latter emphasizes the transmission of electrical energy
In order to reduce the impact of signal modulation on the operation of Switched Reluctance Drive (SRD) as well as to improve the communication rate and the efficiency, this paper proposes a frequency shift keying (FSK) modulation method in the Free-wheeling (FW) section for complex transmission of energy signals
Summary
Energy is considered as necessary support in modern technological and industrial progress [1,2]. Among multiple attempts that aim at optimizing the energy efficiency and developing new energy, much attention of researchers has been given to distributed power generation technology and its application in a micro-grid. The distributed power system consists of two parts: distributed generation power supply and distributed power supply The former focuses on the production of electrical energy, while the latter emphasizes the transmission of electrical energy. With the development of smart grids, distributed power systems integrate communication technology, sensor measurement technology, and information technology to meet the needs of power generation, grid operation, and terminal power consumption [7]. Distributed automated energy exchange network bidirectional flow of power and information. Figure shows the structure of a distributed power system. Shows the structure of a distributed power system
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