EPE Association: EPE 2005 - Topic 14-4: Integration of distributed generation to the grid

EPE 2005 - Topic 14-4: Integration of distributed generation to the grid
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 14: POWER ELECTRONICS IN ELECTRICAL ENERGY GENERATING SYSTEMS > EPE 2005 - Topic 14-4: Integration of distributed generation to the grid

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   (De-)stabilising Effect of Power Electronic Interfaced DG Units in Distribution Networks
By MORREN Johan; FERREIRA J.A.; DE HAAN Sjoerd W.H. [View]
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Abstract: An increasing number of Distributed Generation (DG) units is being connected to the distribution network. This introduces a large number of power electronic converters. Due to the output capacitance of these and other converters there is a risk on harmonics, badly damped transients and so on. In this paper it has been investigated whether the DG unit converters can contribute to the damping in the grid. The analysis showed that for converters with conventional control this contribution is limited, and in some cases even negative. Additional controllers on the DG unit converter are proposed that will significantly increase the damping in the network to which it is connected.

   Active and Reactive Power Control for a Wind Generator Connected to the Grid using Predictive-Integral Control and PI Control Schemes
By GARCI; FELI; RONCER [View]
[Download]

Abstract: This paper investigates the control of the active and reactive power injected into the grid by a variable-speed wind generator. Two different control schemes are studied to achieve a decoupled control of the active and the reactive power. First of all, a classical PI controller designed by means of the pole-placement technique is investigated. Secondly, a predictive-integral controller is realised. The objective of both control schemes has been set to obtain a deadbeat system. The design of these control systems is developed in discrete time and a thorough comparison of both methods is carried out by studying their transient responses, steady states and robustness properties. Simulation results are presented to validate the main contributions of this work.

   New concepts for distributed power generation and power quality for large scale integration of renewable energy sources
By LATAIRE Philippe; CHENG Yonghua [View]
[Download]

Abstract: The concepts of distributed power generator and its operation modes with respect to reliability, stability, and power quality have been presented. We have proposed to use the principle of power balance on the DC bus or/and the AC grid to improve power quality. The control strategies of converters have been evaluated in Matlab simulation. A DC/AC inverter based prototype system of distributed power generator has been realized. The experimental results have shown that high power quality can be achieved in the presence of nonlinear loads and large scale integration of dispersed and renewable energy source into distribution networks.

EPE 2005 - Topic 14-4: Integration of distributed generation to the grid
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 14: POWER ELECTRONICS IN ELECTRICAL ENERGY GENERATING SYSTEMS > EPE 2005 - Topic 14-4: Integration of distributed generation to the grid
	[return to parent folder]

	(De-)stabilising Effect of Power Electronic Interfaced DG Units in Distribution Networks By MORREN Johan; FERREIRA J.A.; DE HAAN Sjoerd W.H.	[View] [Download]
Abstract: An increasing number of Distributed Generation (DG) units is being connected to the distribution network. This introduces a large number of power electronic converters. Due to the output capacitance of these and other converters there is a risk on harmonics, badly damped transients and so on. In this paper it has been investigated whether the DG unit converters can contribute to the damping in the grid. The analysis showed that for converters with conventional control this contribution is limited, and in some cases even negative. Additional controllers on the DG unit converter are proposed that will significantly increase the damping in the network to which it is connected.

	Active and Reactive Power Control for a Wind Generator Connected to the Grid using Predictive-Integral Control and PI Control Schemes By GARCI; FELI; RONCER	[View] [Download]
Abstract: This paper investigates the control of the active and reactive power injected into the grid by a variable-speed wind generator. Two different control schemes are studied to achieve a decoupled control of the active and the reactive power. First of all, a classical PI controller designed by means of the pole-placement technique is investigated. Secondly, a predictive-integral controller is realised. The objective of both control schemes has been set to obtain a deadbeat system. The design of these control systems is developed in discrete time and a thorough comparison of both methods is carried out by studying their transient responses, steady states and robustness properties. Simulation results are presented to validate the main contributions of this work.

	New concepts for distributed power generation and power quality for large scale integration of renewable energy sources By LATAIRE Philippe; CHENG Yonghua	[View] [Download]
Abstract: The concepts of distributed power generator and its operation modes with respect to reliability, stability, and power quality have been presented. We have proposed to use the principle of power balance on the DC bus or/and the AC grid to improve power quality. The control strategies of converters have been evaluated in Matlab simulation. A DC/AC inverter based prototype system of distributed power generator has been realized. The experimental results have shown that high power quality can be achieved in the presence of nonlinear loads and large scale integration of dispersed and renewable energy source into distribution networks.