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15
Distributed voltage and current control of multi-terminal high-voltage direct current transmission systems
- In IFAC World Congress
, 2014
"... Abstract: High-voltage direct current (HVDC) is a commonly used technology for long-distance power transmission, due to its low resistive losses and low costs. In this paper, a novel distributed controller for multi-terminal HVDC (MTDC) systems is proposed. Under certain conditions on the controller ..."
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Cited by 6 (4 self)
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Abstract: High-voltage direct current (HVDC) is a commonly used technology for long-distance power transmission, due to its low resistive losses and low costs. In this paper, a novel distributed controller for multi-terminal HVDC (MTDC) systems is proposed. Under certain conditions on the controller gains, it is shown to stabilize the MTDC system. The controller is shown to always keep the voltages close to the nominal voltage, while assuring that the injected power is shared fairly among the converters. The theoretical results are validated by simulations, where the affect of communication time-delays is also studied. 1.
Control of mtdc transmission systems under local information
- In IEEE Conference on Decision and Control
, 2014
"... Abstract—High-voltage direct current (HVDC) is a commonly used technology for long-distance electric power transmis-sion, mainly due to its low resistive losses. In this paper a distributed controller for multi-terminal high-voltage direct current (MTDC) transmission systems is considered. Sufficien ..."
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Cited by 3 (3 self)
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Abstract—High-voltage direct current (HVDC) is a commonly used technology for long-distance electric power transmis-sion, mainly due to its low resistive losses. In this paper a distributed controller for multi-terminal high-voltage direct current (MTDC) transmission systems is considered. Sufficient conditions for when the proposed controller renders the closed-loop system asymptotically stable are provided. Provided that the closed loop system is asymptotically stable, it is shown that in steady-state a weighted average of the deviations from the nominal voltages is zero. Furthermore, a quadratic cost of the current injections is minimized asymptotically. I.
DECENTRALISED SOURCE SCHEDULING IN A MODEL NANOGRID USING DC BUS SIGNALLING
"... A nanogrid is a small DC power system that uses distributed energy sources to power local loads. DC bus signalling, a novel control strategy that schedules sources in a decentralised fashion, brings the non-renewable sources in a nanogrid online when the renewable sources have been exhausted. This p ..."
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Cited by 1 (1 self)
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A nanogrid is a small DC power system that uses distributed energy sources to power local loads. DC bus signalling, a novel control strategy that schedules sources in a decentralised fashion, brings the non-renewable sources in a nanogrid online when the renewable sources have been exhausted. This paper presents a prototype model nanogrid that uses power electronic converters to interface the sources and loads to the nanogrid. The design of the system is discussed and experimental results are presented. The results show that DC bus signalling allows the sources to be consumed in a prioritised fashion. 1
A Suitable Power Transfer Control System for Interconnection Converter
- of DC Microgrids", International Conference on Renewable Energies and Power Quality (ICREPQ
, 2008
"... Abstract. The operation and control strategies for interconnection of DC microgrids have not been studied in previous researches. In this paper, an electrical model has been developed for DC microgrids and a suitable control system has been proposed for a DC/DC converter connecting two DC microgrids ..."
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Cited by 1 (1 self)
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Abstract. The operation and control strategies for interconnection of DC microgrids have not been studied in previous researches. In this paper, an electrical model has been developed for DC microgrids and a suitable control system has been proposed for a DC/DC converter connecting two DC microgrids. Simulation results indicate the effectiveness of the proposed control strategy in power flow control and the cancellation of interactions between two DC microgrids.
Energy Storage Sizing for Improved Power Supply Availability during
, 2012
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Control Method of the DFIG Connected to a DC Link through a Diode Bridge
, 2013
"... This paper presents a control method for the Doubly-fed Induction Generator connected to a dc link through a diode bridge on the stator. In this system, the rotor is fed, at the slip frequency, by a PWM electronic converter and the stator is directly connected to the dc link using a simple diode bri ..."
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This paper presents a control method for the Doubly-fed Induction Generator connected to a dc link through a diode bridge on the stator. In this system, the rotor is fed, at the slip frequency, by a PWM electronic converter and the stator is directly connected to the dc link using a simple diode bridge. The cost of power electronics is reduced in this system when compared with the classic DFIG machine because the system uses less one PWM inverter and additionally it uses a diode bridge. The application in mind is for microgrids. Microgrids need several elements that should work together. The usual way to connect these elements is to use power electronic devices in a common dc link. This paper presents a new form for the DFIG for this application and presents a control system for the inner control loop. Simulation and ex-perimental results show that the system can work acceptably using a stator frequency near the rated frequency of the machine.
Thermal Impact Analysis of Circulating Current in High Power Modular Online
"... Early version, also known as pre-print ..."
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