Control of a small wind turbine in the high wind speed region

Lumbreras, Carlos; Guerrero, Juan Manuel; Garcı́a, Pablo; Briz, Fernando; Diaz, D.

doi:10.1109/ecce.2014.6954072

Cited by 19 publications

(11 citation statements)

References 27 publications

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“…The control strategy proposed in [30] has been used in this study, and it will be briefly described next. However, the method has been also satisfactory tested [31] with the control method proposed in [14].…”

Section: B Control Systemsmentioning

confidence: 95%

“…Power converters proposed for the MW range, as the indirect boost matrix converter [9], [10] can also be potentially used in the upper power range of small wind turbines (< 100 kW). However, the most used power converter topology for low-power grid-tied systems consists of a diode rectifier and a boost converter on the generator side [11]- [14]. The lower efficiency of this topology compared with a backto-back converter has not a meaningful impact in the annual energy production in small power systems [15].…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Control of the Inductorless Boost Rectifier for Small-Power Wind-Energy Converters

Lumbreras¹,

Guerrero

Fernández

et al. 2019

IEEE Trans. on Ind. Applicat.

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This paper analyzes a cost-effective modification of the power topology commonly found in small wind turbine systems based on a passive rectifier and a boost converter. The boost converter inductor and the input filter capacitor often placed at the rectifier output can be replaced by the generator phase inductance. Different controller structures have been proposed for this low-cost inverter, but they have been focused in the converter itself rather than in the overall turbine control. Moreover, only steady-state behavior has been demonstrated. This paper proposes a control structure only requiring retuning of the boost current controller found in systems equipped with boost inductance; other control loops remaining unchanged. The inductorless converter dynamic performance is studied and compared with the conventional topology in terms on current and torque control capability. The system efficiency, including the losses distribution in the generator, is analyzed. Simulation and experimental results are presented to demonstrate the technical viability of this proposal.

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Section: B Control Systemsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Analysis and Control of the Inductorless Boost Rectifier for Small-Power Wind-Energy Converters

Lumbreras¹,

Guerrero

Fernández

et al. 2019

IEEE Trans. on Ind. Applicat.

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“…Table gives the parameters of selected WTGs used for simulation and experimentation. Figure shows the output power and speed characteristics of the WT for various wind speed . Furthermore, Figure shows that for each wind speed a particular turbine speed exists upon which obtained power is maximum.…”

Section: Proposed Wecs Descriptionmentioning

confidence: 98%

“…By keeping dc link voltages ( V dcx1 and V dcx2 ) constant at their reference values, the amplitude of “ V acx ” can be controlled at the required grid voltage . Wind turbines (WT) extracted the wind kinetic energy and gives the mechanical power output ( P w ) that is calculated by using Betz theory and expressed as follows:

P_{w} = \frac{1}{2} C_{P} ((),, λ_{w}, β) ρ {Av}_{w}^{3}

where “ ρ ” is the air density in kg/m 3 , “ v w ” is the wind velocity in m/s, “ A ” is the area swept by the turbine blades, and “ C P ( λ , β )” is the turbine power coefficient, which is a function of “ λ w ” tip speed ratio and “ β ” blade pitch angle and given as in Equation .

C_{P} ((),, λ_{w}, β) = c_{1} ((), c_{2} \frac{1}{λ_{i}} - c_{3} β - c_{4} β^{c 5} - c_{6}) exp ((), - c_{7} \frac{1}{λ_{i}})

where, “ c 1 to c 7 ” are the WT constant coefficients.…”

Section: Proposed Wecs Descriptionmentioning

confidence: 99%

Capacitor voltage balancing in cascaded H‐bridge multilevel inverter and its modelling analysis for grid integrated wind energy conversion system application

Sharma

Dahiya

Nakka

2019

Circuit Theory & Apps

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windmills may operate at variable speeds. 5 Because of variable speed operation and better performance, the doubly fed induction generator (DFIG) has been conventionally used in WECSs. However, permanent magnet synchronous generator (PMSG) has gained broad attention in wind energy applications due to its high efficiency operation, extended speed operating range, self-excitation capability, and leading to a high power factor. For obtaining high efficiency in WECS, it is essential to manage WT such that they can produce maximum power. MPPT algorithm is required for maximal power extraction from the wind energy sources (WES). 1,[6][7][8][9] The output of wind turbine generator (WTG) coupling are inherently unstable dc voltage. The unstable output of WTG contribute to the power quality and stability issues like voltage variations, harmonic generation, and flickers in the grid network. Unwanted harmonics are produced due to the presence of power converters. In addition, due to the varying wind speed, flicker or voltage variation occurs in output power supply. Thus, for the grid integration of WECS, the need of advanced power electronic converters (rectifier, boost converters, and inverters) under transient and steady-state operating condition configuration and their proficient control are necessary to standardize the converter output voltage, even under changing environmental conditions. 3,10 Nowadays, in this type of applications, the multilevel inverters are mostly used in comparison to elementary two-level inverters due to several advantages. [11][12][13][14] Among all standard MLI topologies, "cascaded H-bridge inverter (CHBI)" is primarily used for grid-integrated WECS applications owing to its simpler layout, modular design, reduced number of components as compared with other classical MLI topologies and the use of low voltage rated switches for achieving high or medium power level. [14][15][16][17][18][19] In proposed WECS, WTG coupled systems are connected to two individual H-bridges per phase of CHBMLI through isolated dc link along with respective independent boost converter-based maximum power point tracking (MPPT) system. In addition, by cascading these two H-bridges, the desired five-level output phase voltage is obtained.The major advantage of adopted CHBMLI topology possessing the isolated dc links plays the prominent role to legitimate in connecting two WECS with unequivocal power generation because of deviation of the wind speeds among the windmills at any point of time. In addition, this MLI support to adjoin two medium voltage WECS to feed the total power generated into the high voltage grid without any transformers, but at the same time, the system achieves the better synchronization along with calibrated and controlled power flow. It is an important note to consider that either the CHB topology used as an inverter or a rectifier the mandate of possessing equal dc link voltages is essential to justify identical permissible voltage stress among all switching devices in multilevel topologies at high ...

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“…Figure 1 shows commonly used topologies for DDWTs using the PMSG. Figure 1(a) displays the power electronics interface which consists of a diode bridge rectifier, dc-dc boost converter, and grid-tied VSC [17,18]. Figure 1(b) shows another DDWT topology with power electronics interface consisting of grid-tied back-to-back Current Source Converters (CSCs) connected through a dc-link inductor [19,20].…”

Section: Direct Drive Wind Turbine (Ddwt) Topologiesmentioning

confidence: 99%

Development and Control of Generator-Converter Topology for Direct-Drive Wind Turbines

Singh¹

2020

Rotating Machinery

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In this chapter, a new topology for Direct-Drive Wind Turbines (DDWTs) with a low-voltage generator design is presented in order to eliminate the required dc-bus capacitors or dc-link inductors. In the presented topology, the grid-side converter is replaced by a boost Current Source Inverter (CSI) therefore removing the need for the dc-bus electrolytic capacitors which results in increasing the system lifetime. In the developed topology, the synchronous inductance of the generator is utilized. This facilitates the elimination of the intrinsically required dc-link inductor in the CSI which further contributes to a reduction in the overall system weight and size. The boost CSI is capable of converting a low dc voltage to a higher line-to-line voltage. This results in the implementation of a low-voltage generator for DDWTs. The feasibility of the presented low-voltage generator is investigated through Finite Element (FE) computations. In this chapter, a modified 1.5 MW low-voltage generator for the proposed topology is compared with an existing 1.5 MW Permanent Magnet (PM) synchronous generator for DDWTs. The feasibility of the presented topology of generator-converter for DDWTs is verified through simulations and laboratory tests. Furthermore, the controls developed for the developed wind turbine topology is also presented in this chapter.

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Control of a small wind turbine in the high wind speed region

Cited by 19 publications

References 27 publications

Analysis and Control of the Inductorless Boost Rectifier for Small-Power Wind-Energy Converters

Analysis and Control of the Inductorless Boost Rectifier for Small-Power Wind-Energy Converters

Capacitor voltage balancing in cascaded H‐bridge multilevel inverter and its modelling analysis for grid integrated wind energy conversion system application

Development and Control of Generator-Converter Topology for Direct-Drive Wind Turbines

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