EPE Association: EPE 2020 - DS3h: Wind Energy Systems

EPE 2020 - DS3h: Wind Energy Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 05: Renewable Energy Power Systems > EPE 2020 - DS3h: Wind Energy Systems

   [return to parent folder]

   A Robust Fuzzy-based Control Technique for Wind Farm Transient Voltage Stability Using SVC and STATCOM: Comparison Study
By Reza EBRAHIMI [View]
[Download]

Abstract: The wind farm is subjected to various fault conditions to observe voltage and power fluctuations. To improve the transient voltage stability, under various fault conditions, STATCOM and SVC are used which are controlled by fuzzy logic controller also be compared with PI controller.

   Hardware Implementation study of Variable Speed Wind-Turbine-DFIG in Stand-alone Mode
By Fayssal AMRANE [View]
[Download]

Abstract: In this paper, hardware implementation study based on Direct Power Control (DPC) of Doubly Fed Induction Generator (DFIG) is proposed for Stand-alone mode in Variable Speed-Wind Energy Conversion System (VS-WECS). The proposed DPC algorithm based on robust IP (Integral-Proportional) controllers in order to control the Rotor Side Converter (RSC) by the means of the rotor current d-q axes components (Ird and Irq) of DFIG through AC-DC-AC converter. In order to improve the grid-side and rotor side power qualities, LCL passive filter is implemented between the DFIG's rotor and the inverter. Finally, experimental results demonstrate that the proposed control using IP provides improved dynamic responses, and decoupled power control (with high performances: good reference tracking, short response time and low power error) despite for sudden wind speed changement and the variation of rotor current.

   Neutral point potential ripple and its impact on the grid side harmonics of a 3LNPC back-to-back converter employed in a medium voltage WECS
By Ioannis TSOUMAS [View]
[Download]

Abstract: The operation of a back-to-back three-level neutral point clamped (3LNPC) converter employed in a medium voltage (MV) wind energy conversion system (WECS) is investigated. In particular, the interharmonics that appear on the point of common coupling (PCC) due to low frequency oscillations of the neutral point (NP) potential of the converter.

   New High-efficiency Power Generation UsingPosition Sensor-less Permanent Magnet Synchronous Generator
By Somi TAKEUCHI [View]
[Download]

Abstract: Recently, wind power generation has attracted attention as a system using natural energy. The variable speed control of wind power generation using a permanent magnet synchronous generator (PMSG) is not required exciter and gear, so there is an advantage that low cost and low noise, but they cannot be operated stably because of large output fluctuations. Also, a position sensor for the rotation angle information is required, which is disadvantageous for maintenance and price.In order to solve these problems, this paper investigates a new control scheme that can efficiently generate power without a position sensor.The angle information is estimated mathematically from the information of the output from the generator without position sensors. This sensorless system aims to reduce the operating costs of wind power generation.Specifically, this paper uses an internal electromotive force (EMF) estimation of a generator and a phase locked loop (PLL) system. The angle information is estimated by generating a sine wave synchronized with the sine wave of the internal electromotive force that has the angle information using the PLL system. The internal electromotive force is calculated by focusing on the internal structure of the generator. We will do simulations with the software and experiments to see if this study can be carried out in practice. As a result of simulations and experiments, we were able to estimate the angle information. It was also confirmed that the information was used to control the generator at variable speed and at load change. From the experimental results, it was confirmed that good results could be obtained without using the rotation angle information. The proposed control method can be applied not only to wind power generation but also to various power generation using a position sensor-less.

   Offshore wind farm layout optimization considering wake effects
By Asma DABBABI [View]
[Download]

Abstract: With the serious concern for environmental problems, the exploitation of renewable energies isbecoming a need and no longer a choice, offshore wind energy is one of the trends in the renewableenergy market. The exploitation of this energy demands important investment costs that's whyoptimizing the wind farm layout is primordial to make a cost effectiveness during the lifetime of thepark. Otherwise, minimizing the Levelized Cost Of Energy (LCOE) is the key to have the tradeoffbetween wind farm cost and the annual energy delivered to the terrestrial network. For a realisticframework, the wind farm losses must take into account the wake losses between turbines so acalculation tool of wake effect is developed in this paper.

   Unidirectional thyristor-based DC-DC converter for HVDC connection of offshore wind farms
By Pierre LE METAYER [View]
[Download]

Abstract: This paper introduces a unidirectional MVDC-HVDC converter for `all DC' connected offshore windfarms. This converter combines the low power losses of thyristor based converters and the controlabilities of voltage source converters, together with low power electronics component count. A highstep-up ratio is achieved by an input parallel output series configuration. The use of medium frequencyis discussed and inductance design conditions are given. A control scheme is proposed and validated bysimulations. The converter high efficiency is also observed. The presented analysis shows a potentialfeasibility and benefits of this novel unidirectional thyristor-based DC-DC converter.

EPE 2020 - DS3h: Wind Energy Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 05: Renewable Energy Power Systems > EPE 2020 - DS3h: Wind Energy Systems
	[return to parent folder]

	A Robust Fuzzy-based Control Technique for Wind Farm Transient Voltage Stability Using SVC and STATCOM: Comparison Study By Reza EBRAHIMI	[View] [Download]
Abstract: The wind farm is subjected to various fault conditions to observe voltage and power fluctuations. To improve the transient voltage stability, under various fault conditions, STATCOM and SVC are used which are controlled by fuzzy logic controller also be compared with PI controller.

	Hardware Implementation study of Variable Speed Wind-Turbine-DFIG in Stand-alone Mode By Fayssal AMRANE	[View] [Download]
Abstract: In this paper, hardware implementation study based on Direct Power Control (DPC) of Doubly Fed Induction Generator (DFIG) is proposed for Stand-alone mode in Variable Speed-Wind Energy Conversion System (VS-WECS). The proposed DPC algorithm based on robust IP (Integral-Proportional) controllers in order to control the Rotor Side Converter (RSC) by the means of the rotor current d-q axes components (Ird and Irq) of DFIG through AC-DC-AC converter. In order to improve the grid-side and rotor side power qualities, LCL passive filter is implemented between the DFIG's rotor and the inverter. Finally, experimental results demonstrate that the proposed control using IP provides improved dynamic responses, and decoupled power control (with high performances: good reference tracking, short response time and low power error) despite for sudden wind speed changement and the variation of rotor current.

	Neutral point potential ripple and its impact on the grid side harmonics of a 3LNPC back-to-back converter employed in a medium voltage WECS By Ioannis TSOUMAS	[View] [Download]
Abstract: The operation of a back-to-back three-level neutral point clamped (3LNPC) converter employed in a medium voltage (MV) wind energy conversion system (WECS) is investigated. In particular, the interharmonics that appear on the point of common coupling (PCC) due to low frequency oscillations of the neutral point (NP) potential of the converter.

	New High-efficiency Power Generation UsingPosition Sensor-less Permanent Magnet Synchronous Generator By Somi TAKEUCHI	[View] [Download]
Abstract: Recently, wind power generation has attracted attention as a system using natural energy. The variable speed control of wind power generation using a permanent magnet synchronous generator (PMSG) is not required exciter and gear, so there is an advantage that low cost and low noise, but they cannot be operated stably because of large output fluctuations. Also, a position sensor for the rotation angle information is required, which is disadvantageous for maintenance and price.In order to solve these problems, this paper investigates a new control scheme that can efficiently generate power without a position sensor.The angle information is estimated mathematically from the information of the output from the generator without position sensors. This sensorless system aims to reduce the operating costs of wind power generation.Specifically, this paper uses an internal electromotive force (EMF) estimation of a generator and a phase locked loop (PLL) system. The angle information is estimated by generating a sine wave synchronized with the sine wave of the internal electromotive force that has the angle information using the PLL system. The internal electromotive force is calculated by focusing on the internal structure of the generator. We will do simulations with the software and experiments to see if this study can be carried out in practice. As a result of simulations and experiments, we were able to estimate the angle information. It was also confirmed that the information was used to control the generator at variable speed and at load change. From the experimental results, it was confirmed that good results could be obtained without using the rotation angle information. The proposed control method can be applied not only to wind power generation but also to various power generation using a position sensor-less.

	Offshore wind farm layout optimization considering wake effects By Asma DABBABI	[View] [Download]
Abstract: With the serious concern for environmental problems, the exploitation of renewable energies isbecoming a need and no longer a choice, offshore wind energy is one of the trends in the renewableenergy market. The exploitation of this energy demands important investment costs that's whyoptimizing the wind farm layout is primordial to make a cost effectiveness during the lifetime of thepark. Otherwise, minimizing the Levelized Cost Of Energy (LCOE) is the key to have the tradeoffbetween wind farm cost and the annual energy delivered to the terrestrial network. For a realisticframework, the wind farm losses must take into account the wake losses between turbines so acalculation tool of wake effect is developed in this paper.

	Unidirectional thyristor-based DC-DC converter for HVDC connection of offshore wind farms By Pierre LE METAYER	[View] [Download]
Abstract: This paper introduces a unidirectional MVDC-HVDC converter for `all DC' connected offshore windfarms. This converter combines the low power losses of thyristor based converters and the controlabilities of voltage source converters, together with low power electronics component count. A highstep-up ratio is achieved by an input parallel output series configuration. The use of medium frequencyis discussed and inductance design conditions are given. A control scheme is proposed and validated bysimulations. The converter high efficiency is also observed. The presented analysis shows a potentialfeasibility and benefits of this novel unidirectional thyristor-based DC-DC converter.