EPE Association: EPE-PEMC 2008 - Topic: Utility Application

EPE-PEMC 2008 - Topic: Utility Application
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2008 - Conference > EPE-PEMC 2008 - Topic: Utility Application

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   A New Control Method for Power Turbine Generators Using an Accurate Ship Plant System Model
By Nobumasa Matsui [View]
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Abstract: The purpose of this paper is to present a new control method for a power turbine generator (PTG) system using an accurate ship plant system model that ascertains startup characteristics. The PTG system is a waste heat recovery type generation system making use of exhaust gas from the main shipboard diesel engines. However, with the PTG systems, control during startup is not entirely clear. Startup characteristics from power turbine startup through synchronization to the system bus are ascertained using an accurate simulation model, and startup sequence control is clarified for a combination of gas valve operation and load bank. A prototype constructed on the basis of the simulation. As a result, in the startup process, so as to limit speed overshooting that is 0.83 p. u. at 100\% output from main diesel engine as the severest condition. The synchronization to the system bus is attained, and highly satisfactory results are achieved.

   Design of Frequency Shift Acceleration Control for Anti-Islanding of an Inverter-Based DG
By Seul-Ki Kim, Jin-Hong Jeon, Heung-Kwan Choi and Jonng-Bo Ahn [View]
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Abstract: The paper proposes frequency shift acceleration control (FSAC) for anti-islanding of an inverter-based distributed generator. The key concept is to disturb an islanded system frequency by controlling reactive current output in d-q frame, and accelerate the resulting frequency shift using an acceleration gain. Design method of the acceleration gain is proposed using analytical approaches, based on small-signal stability and step input response. Simulation and experimental results are presented.

   Integrated Power Converter for Photovoltaic and Fuel Cell Systems in Home
By Yasuyuki Nishida [View]
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Abstract: Renewable energy has been a great concern to obtain ecological society that can continuously grow. As an attractive solution, the Fuel Cell cogeneration system has been attracted and some first products have been developed in Japan and in some other centuries/areas. A product in Japan, which is the first developed system and few hundreds of the sets are under operation in Japanese homes, has been investigated and practically evaluated in this digest. The novel topology consisting of a high-frequency transformer isolated soft-switching dc-dc converter and a utility interactive PWM inverter are introduced and practically evaluated.

   Modeling, Simulation and Analysis of Conducted Common-Mode EMI in Matrix Converters for Wind Turbine Generators
By S. Zhang and K. J. Tseng [View]
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Abstract: This paper introduces an equivalent circuit analysis method to investigate common-mode effects in matrix converter applied in wind energy systems. Transfer characteristics of common-mode current against emission sources are analyzed in order to identify the coupling of transfer functions due to absence of DC link. The comprehensive analysis results provide insight into the common-mode current generation, coupling, and transmission. In addition, the matrix converter time-domain model is established with accurate parasitic parameters from experimental measurements. The validity and effectiveness of analysis method has been verified by time-domain simulation.

   Voltage Profile Support in Distribution Networks - Influence of the Network R/X Ratio
By B. Blažič and I. Papič [View]
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Abstract: One of the problems emerging with a rising share of distributed generation (DG) is also the regulation of voltage levels in different operating conditions. Distribution network voltage profile can be controlled with the use of active compensators and also with converters which are used for connection of DG. Both devices are usually based on a voltage-source converter with a capacitor or dc source connected to the dc side. The paper presents the influence of the network R/X ratio on compensation effectiveness of shunt compensators. This ratio influences the ability to control voltage and must be taken into account at device design.

EPE-PEMC 2008 - Topic: Utility Application
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2008 - Conference > EPE-PEMC 2008 - Topic: Utility Application
	[return to parent folder]

	A New Control Method for Power Turbine Generators Using an Accurate Ship Plant System Model By Nobumasa Matsui	[View] [Download]
Abstract: The purpose of this paper is to present a new control method for a power turbine generator (PTG) system using an accurate ship plant system model that ascertains startup characteristics. The PTG system is a waste heat recovery type generation system making use of exhaust gas from the main shipboard diesel engines. However, with the PTG systems, control during startup is not entirely clear. Startup characteristics from power turbine startup through synchronization to the system bus are ascertained using an accurate simulation model, and startup sequence control is clarified for a combination of gas valve operation and load bank. A prototype constructed on the basis of the simulation. As a result, in the startup process, so as to limit speed overshooting that is 0.83 p. u. at 100\% output from main diesel engine as the severest condition. The synchronization to the system bus is attained, and highly satisfactory results are achieved.

	Design of Frequency Shift Acceleration Control for Anti-Islanding of an Inverter-Based DG By Seul-Ki Kim, Jin-Hong Jeon, Heung-Kwan Choi and Jonng-Bo Ahn	[View] [Download]
Abstract: The paper proposes frequency shift acceleration control (FSAC) for anti-islanding of an inverter-based distributed generator. The key concept is to disturb an islanded system frequency by controlling reactive current output in d-q frame, and accelerate the resulting frequency shift using an acceleration gain. Design method of the acceleration gain is proposed using analytical approaches, based on small-signal stability and step input response. Simulation and experimental results are presented.

	Integrated Power Converter for Photovoltaic and Fuel Cell Systems in Home By Yasuyuki Nishida	[View] [Download]
Abstract: Renewable energy has been a great concern to obtain ecological society that can continuously grow. As an attractive solution, the Fuel Cell cogeneration system has been attracted and some first products have been developed in Japan and in some other centuries/areas. A product in Japan, which is the first developed system and few hundreds of the sets are under operation in Japanese homes, has been investigated and practically evaluated in this digest. The novel topology consisting of a high-frequency transformer isolated soft-switching dc-dc converter and a utility interactive PWM inverter are introduced and practically evaluated.

	Modeling, Simulation and Analysis of Conducted Common-Mode EMI in Matrix Converters for Wind Turbine Generators By S. Zhang and K. J. Tseng	[View] [Download]
Abstract: This paper introduces an equivalent circuit analysis method to investigate common-mode effects in matrix converter applied in wind energy systems. Transfer characteristics of common-mode current against emission sources are analyzed in order to identify the coupling of transfer functions due to absence of DC link. The comprehensive analysis results provide insight into the common-mode current generation, coupling, and transmission. In addition, the matrix converter time-domain model is established with accurate parasitic parameters from experimental measurements. The validity and effectiveness of analysis method has been verified by time-domain simulation.

	Voltage Profile Support in Distribution Networks - Influence of the Network R/X Ratio By B. Blažič and I. Papič	[View] [Download]
Abstract: One of the problems emerging with a rising share of distributed generation (DG) is also the regulation of voltage levels in different operating conditions. Distribution network voltage profile can be controlled with the use of active compensators and also with converters which are used for connection of DG. Both devices are usually based on a voltage-source converter with a capacitor or dc source connected to the dc side. The paper presents the influence of the network R/X ratio on compensation effectiveness of shunt compensators. This ratio influences the ability to control voltage and must be taken into account at device design.