Please enter the words you want to search for:

WECS & T&D 2012 - 03 - DS - T4: Grid Connection and Compliance of Wind Power
You are here: EPE Documents > 03 - EPE Seminar Papers > 006 - EPE Joint Wind Energy and T&D Chapters Seminar (2012) > WECS & T&D 2012 - 03 - DS - T4: Grid Connection and Compliance of Wind Power
	[return to parent folder]
	The Comparison of Polish Grid Codes to Certain European Standards and Resultant Differences for WPP Requirements   By W. Jarzyna; P. Lipnicki	[View]   [Download]
Abstract: The poster of "The Comparison of Polish Grid Codes to Certain European Standards and Resultant Differences for WPP Requirements"
	Assessment-Based Flux Trajectory Optimization(AFO) for Offshore Line-Side and Machine-Side   By D. Meyer; C. Heising; V. Staudt; A. Steimel	[View]   [Download]
Abstract: The poster of "Assessment-Based Flux Trajectory Optimization(AFO) for Offshore Line-Side and Machine-Side"
	The Transition Process of Squirrel-Cage Induction Generator Based Wind Turbine in Grid Fault and Its Low Voltage Ride-Through Method   By Xiangwu Yan; Zheng Chen; Liming Yang	[View]   [Download]
Abstract: The poster of "The Transition Process of Squirrel-Cage Induction Generator Based Wind Turbine in Grid Fault and Its Low Voltage Ride-Through Method"
	Grid Code Compliance in MTDC Networks   By R. Teixeira Pinto; P. Bauer	[View]   [Download]
Abstract: The slides of "Grid Code Compliance in MTDC Networks"
	Flexible Arrangement of Static Converters for Grid ConnectedWind Energy Conversion Systems - Paper   By F. B. Grigoletto; H. Pinheiro	[View]   [Download]
Abstract: This paper presents a new flexible arrangement of static converters for grid connected Wind Energy Conversion Systems (WECS). The proposed arrangement uses three phase voltage fed back-to-back mass produced power converter modules with reconfiguration switches. The main features of the proposed flexible arrangement are: (i) expanded reactive power capability limits, (ii) high efficiency mainly under low wind conditions where the active power is reduced, and (iii) low current harmonic content. In addition, a detailed description of the operating modes, as well as the grid, generator and circulating current controllers design are given. Finally, simulation results demonstrate the good performance and flexibility of the proposed arrangement.
	The Comparison of Polish Grid Codes to Certain European Standards and Resultant Differences for WPP Requirements - Paper   By W. Jarzyna; P. Lipnicki	[View]   [Download]
Abstract: Grid Codes of Transmissions System Operators (TSO) put large demands on the currently installed Wind Power Plants (WPPs). Nowadays WPP are treated similarly as conventional power stations. They should work even if operating conditions deviate from nominal values, e.g. when during a fault the voltage at the connection bus drops nearly to zero. The paper describes grid codes distinguishing requirements of active and reactive power generation and Fault Ride Through characteristics. Among the described standards Polish, German and Danish and in some cases British and Norwegian requirements are mentioned. The differences between the standards are reviewed and are referenced to Polish grid regulations. Discussion supplements certain results of the laboratory research.
	Assessment-Based Flux Trajectory Optimization for Offshore Line-Side and Machine-Side Converters - Paper   By Daniel Meyer and Carsten Heising; Volker Staudt and Andreas Steimel	[View]   [Download]
Abstract: A novel approach to flux-based control, ’assessmentbased flux trajectory optimization’ (AFO), is presented and analysed, which directly takes the properties of the converter into account. It seamlessly integrates stationary operation, slow and fast dynamics. The optimal flux trajectory is defined, based on the relatively few possibilities resulting from the discrete switching states of the converter and their combination on an instantaneous basis. Within each control cycle, optimal switching states for the next control interval are selected. The criterion for optimality bases on weighted assessment rules in time domain. The paper gives basic assessment rules and resulting flux curves for stationary and dynamic operation.
	The Transition Process of Wind Turbine Based on Squirrel-Cage Induction Generator When Voltage Sag and Its Low Voltage Ride-Through Method - Paper   By Xiangwu Yan; Zheng Chen; Liming Yang; Ruoying Guo; Yuzhao Liang	[View]   [Download]
Abstract: This paper reveals two typical phenomena of Squirrel-Cage Induction Generator (SCIG) based wind turbine during the voltage sag, such as asynchronous induction generator going into stall and the shocks of the electromagnetic torque with polarity reversal, the result shows low voltage ride-through(LVRT) capability of SCIG wind turbine is very poor. A method of using a stator series resistance device is proposed for SCIG based wind turbine LVRT. Both detailed analysis and simulation results demonstrate it is an safety and effective method to ensure the SCIG based wind turbine against the impact of the PCC voltage sag, and provide maximum active and reactive power to support the grid stability and security.