| WECS 2010 - 04 - Lecture Session 3: Components and System Engineering | ||
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 | The stability of multiple, high power, active front end voltage sourced converters when connected to wind farm collector systems (Paper)
By Paul Brogan | |
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Abstract: In much of the published analysis of the operation of active front end voltage sourced converters connected to power systems, the network is represented as a simple resistive inductive circuit. However real, multiple turbine, wind park collector systems have significant MV collector cabling and/or overhead lines, and depending on the wind farm, HV cabling which add distributed capacitance and so create resonances which interact with the active front end (network bridge) closed loop current control. The characteristics of these resonances, and hence the stability margins of the closed loop systems, are dependent on the number of collector cables in service, the system fault level, the number of turbines connected, power factor correction equipment, as well as the frequency dependency of such components. This can represent a significant range of operating conditions.
This paper presents the multiple methods by which the stability of such systems can be assessed using actual wind farm data, and then examines the stability implications when standard current controllers are used, such as those presented in much of the published literature. It will be shown that such systems can be robustly controlled to meet the demanding transient and steady state stability requirements required from modern power converters within such applications and how, through the use of the these techniques, large numbers of wind turbines operating on relatively low fault level supplies can be integrated into the power supply network.
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| | The stability of multiple, high power, active front end voltage sourced converters when connected to wind farm collector systems (Presentation)
By Paul Brogan | |
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Abstract: The presentation of: The stability of multiple, high power, active front end voltage sourced converters when connected to wind farm collector systems
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| | Reliability of the Electrical Parts of Wind Energy Systems – a statistical evaluation of practical experiences (Paper)
By P. Lyding; S. Faulstich; B. Hahn; P. Tavner | |
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Abstract: The contribution presents findings about reliability of electrical subassemblies of wind turbines. It shows that failures of the electrical system appear frequently and that the share of these failures is
increasing with ongoing technical development. However, the faults of electrical subassemblies are
wide-spread over numerous subassemblies. By analyzing the electrical system, it can be seen that the
share of electrical subassemblies affected shows a uniform distribution. A closer look at the converter
in particular shows that failures of the converter are one half each due to failures in semiconductor parts. Since detailed documentation of all maintenance measures of a large population of plants and a purposeful structured database are necessary to extract sound conclusions out of the operational experience, an outlook about gathering and evaluating future operational experiences of on- and
offshore wind farms will be given.
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| | Reliability of the Electrical Parts of Wind Energy Systems – a statistical evaluation of practical experiences (Presentation)
By P. Lyding; S. Faulstich; B. Hahn; P. Tavner | |
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Abstract: The presentation of: Reliability of the Electrical Parts of Wind Energy Systems – a statistical evaluation of practical experiences
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| | A New Advanced Wind-Farm Real-Time Simulator Platform (Paper)
By A. Benigni; F. Adler; F. Mura; C. Dick; R. De Doncker; A. Monti | |
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Abstract: The paper presents an on-going effort in the development of a new generation real-time simulation platform dedicated to the simulation of large wind farm. The proposed system will be based on a
custom solution both from the hardware and the software point of view. The reason for this choice is the high level of performance put as target together with the desired high level of details for the
modeling process. The chosen architecture is based on a new rack-based hardware where a last
generation DSP plays the role of main computational units. FPGA plays the role of data router allowing a high level of parallelism for the computational process. The paper details the technical
choices made to achieve the best in terms of performance and modularity.
Preliminary simulation results complete the discussion giving a first glimpse on the possible future simulation performance.
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| | A New Advanced Wind-Farm Real-Time Simulator Platform (Presentation)
By A. Benigni; F. Adler; F. Mura; C. Dick; R. De Doncker; A. Monti | |
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Abstract: The presentation of: A New Advanced Wind-Farm Real-Time Simulator Platform
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