Electromechanical Modelling and Control of a Micro-Wind Generation System for Isolated Low Power DC Micro Grids

Subirachs, Alba Colet; Bellmunt, Oriol Gomis; Costa, Daniel Clos; Segura, Guillermo Martín; Ferré, Adrià Junyent; Robles, Roberto Villafáfila; Martí, Laia Ferrer

doi:10.1080/09398368.2010.11463758

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…The PMSG can be modelled as an AC voltage source in accordance with a resistor and an inductor. The amplitude and frequency of the AC source depend on the rotational speed of the rotor as [2]

V_{G} = K p normalΩ, f_{G} = \frac{p normalΩ}{2 π}

where V G is the per‐phase generated output voltage, K is the constant derived from the alternator, f G is the electrical frequency and p is the generator number of the pole pairs. When the blade pitch angle β = 0° and the tip‐speed ratio λ reach maximum value, at each wind speed a maximum power is captured.…”

Section: Problem Formulation and Motivationmentioning

confidence: 99%

“…Microgrids are attractive energy management systems that combine local distribution systems and small‐scale or medium‐scale renewable energy sources, such as photovoltaic systems, wind generation systems (WGSs), distributed storage units and fuel cells [1–3]. In microgrids, grid‐connected systems (GCSs) store renewable energy into battery banks by using DC–DC converters or divert energy into local loads by using DC–AC inverter controls.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of a chaos synchronisation‐based maximum power tracking controller for a wind‐energy‐conversion system

Zhan¹,

Chen²,

Chen³

et al. 2014

IET Renewable Power Generation

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This study proposes a maximum power tracking (MPT) controller based on chaos synchronisation (CS) for a windenergy-conversion system. The output power conversion of a wind generator depends on the wind speed, and therefore the optimal conversion of wind energy can be obtained by a variable-speed variable-frequency model. Based on a sensorless controller, CS can express dynamic behaviours by using an incremental conductance to adjust the terminal voltage to the maximum power point. A voltage detector based on the Sprott system is used to track the desired voltage and to control the duty cycle of a boost converter. For a permanent-magnet synchronous generator, the simulation results demonstrate the effectiveness of the proposed MPT controller.

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“…The PMSG can be modelled as an AC voltage source in accordance with a resistor and an inductor. The amplitude and frequency of the AC source depend on the rotational speed of the rotor as [2]

V_{G} = K p normalΩ, f_{G} = \frac{p normalΩ}{2 π}

Section: Problem Formulation and Motivationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of a chaos synchronisation‐based maximum power tracking controller for a wind‐energy‐conversion system

Zhan¹,

Chen²,

Chen³

et al. 2014

IET Renewable Power Generation

View full text Add to dashboard Cite

show abstract

“…The turbine operates at high rotational speeds, nominally 420 rpm. This allows connecting the rotor shaft to the generator shaft directly, and makes unnecessary to devise a heavy transmission system [23]. The generator-rotor system is attached to the nacelle, a cylindrical piece of steel inserted in the upper end of the tower.…”

Section: Methodsmentioning

confidence: 99%

“…The HP-600W is designed to work nominally at higher wind speeds compared to the IT-PE-100, i.e., 12 m s -1 of rated wind speed for 600 W of rated output power, versus 6.5 m s -1 of rated wind speed for 100 W of rated output power. Like the IT-PE-100, the HP-600W has an axialflux permanent magnet synchronous generator [23], [24], but it works at higher rotational speed, nominally 810 rpm. …”

Section: Methodsmentioning

confidence: 99%

An assessment of the sea breeze energy potential using small wind turbines in peri-urban coastal areas

Bueso

Rojas

Jou

et al. 2015

Journal of Wind Engineering and Industrial Aerodynamics

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From wind speed data recorded hourly at 2 m high during 18 years (1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010) in the Llobregat Delta (15 km south of Barcelona city; northeast of the Iberian Peninsula), wind speed distributions at 10 m high were computed for the whole year and for the sea breeze period (from March 1 to September 30, from 10 to 19 local time). Weibull probability density functions fitted to the distributions were used to assess the wind energy generated by two offgrid small wind turbines: the IT-PE-100 and the HP-600W. Results from FAST and AeroDyn simulation tools were compared with those obtained by applying measured wind speeds to manufacturer power curves. Using manufacturer data, the IT-PE-100 would deliver 132 kWh during the whole year (70 kWh during the sea breeze period). From the simulations, the IT-PE-100 would deliver 155 kWh during the whole year (80 kWh during the sea breeze period). It is concluded that the sea-breeze is an interesting wind energy resource for micro-generation, not only in the Mediterranean basin but in other areas of the world with similar wind regimes, and particularly in peri-urban coastal areas where large-scale wind farms cannot be implemented.

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“…There are mainly two types of line technology interconnecting microgrids: AC and DC. While the AC technology is the widely and conventionally adopted solution for the development of power systems worldwide, DC technology is gaining importance by the hand of power electronics-interfaced systems, such as, for instance, offshore wind power plants [110,141] and microgrids [142] .…”

Section: Line Technologymentioning

confidence: 99%

Feeder flow control and operation in large scale photovoltaic power plants and microgrids : Part I Feeder ow control in large scale photovoltaic power plants : Part II Multi-microgrids and optimal feeder ow operation of microgrids

Massagué¹

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This thesis deals with the integration of photovoltaic energy into the electrical grid. For this purpose, two main approaches can be identified: the interconnection of large scale photovoltaic power plants with the transmission network, and the interconnection of small and medium-scale photovoltaic installations with the distribution network. The first part of the thesis is focussed on the interconnection of large scale photovoltaic power plants. Large scale photovoltaic power plants are required to provide different ancillary services to the electrical networks. For this purpose, it is necessary to control the active and reactive power injected by photovoltaic power plants at the point of interconnection, i.e. to control the power flow through the main feeder. In this direction, it is developed a central controller capable of coordinating the different devices of the photovoltaic power plants as photovoltaic inverters, FACTS, capacitor banks and storage. The second part is focused on the distributed generation, consisting on small and medium-scale generation facilities connected to the distribution system. In this context, distribution grids, traditionally operated as passive systems, become active operated systems. In this part, the microgrid concept is analysed, which is one of the most promising solutions to manage, in a coordinated manner, the different distributed energy resources. Taking into account the possible transformation of the current distribution system to a multi-microgrid based system, the different architectures enabling microgrids interconnections are analysed. For the multi-microgrid operation, it could result interesting that a portion of their networks operate so that the power exchange is maintained constant, i.e. controlling the power flow at the main feeder. In this thesis, an optimal power flow problem formulation for managing the distributed generation of these feeder flow controlled microgrids is proposed. La present tesi tracta de la integració d'energia fotovoltaica en xarxes elèctriques. Per a tal finalitat, es poden identificar dues grans tendències en l'actualitat: la interconnexió de grans plantes de generació en la xarxa de transport (alta tensió), i la interconnexió de petites i mitjanes instal·lacions en la xarxa de distribució (mitja i baixa tensió). La primera part s'enfoca a la interconnexió de grans plantes de generació fotovoltaica. Degut als canvis dels darrers anys en el mix de generació elèctrica, les grans plantes de generació fotovoltaica es veuen obligades a donar diversos serveis de suport a les xarxes elèctriques. Per a aquesta finalitat, resulta necessari controlar la potencia activa i reactiva que la planta injecta en el punt de connexió, és a dir, controlar la potencia en la línia d’alimentació principal, feeder. En aquest sentit, es desenvolupa un controlador central capaç de coordinar els diferents elements de les plantes fotovoltaiques com els inversors fotovoltaics, FACTS, bancs de condensadors i bateries d'emmagatzematge. La segona part s'enfoca a l'anomenada generació distribuïda, de la que formen part les petites instal·lacions generadores connectades a la xarxa de distribució. En aquest context, aquestes xarxes passen de ser operades de forma passiva a forma activa. En aquesta part s'analitza el concepte de microxarxa, una de les solucions més prometedores per gestionar els diferents recursos distribuïts. Donat que es pot esperar una transformació del sistema de distribució actual a un sistema basat en multi-microxarxes, s'analitzen les diferents arquitectures amb les quals aquestes es poden interconnectar. Per la operació de multi-microxarxes pot resultar interessant que algunes microxarxes operin de forma que la potencia intercanviada amb la xarxa externa sigui constant, és a dir, controlant el flux de potencia de la línia d’alimentació principal. En aquesta tesi es realitza la formulació d'un problema d’optimització de fluxos de potencia per gestionar la generació distribuïda d'aquestes microxarxes.

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Electromechanical Modelling and Control of a Micro-Wind Generation System for Isolated Low Power DC Micro Grids

Abstract: Abstract

Cited by 4 publications

References 11 publications

Design of a chaos synchronisation‐based maximum power tracking controller for a wind‐energy‐conversion system

Design of a chaos synchronisation‐based maximum power tracking controller for a wind‐energy‐conversion system

An assessment of the sea breeze energy potential using small wind turbines in peri-urban coastal areas

Feeder flow control and operation in large scale photovoltaic power plants and microgrids : Part I Feeder ow control in large scale photovoltaic power plants : Part II Multi-microgrids and optimal feeder ow operation of microgrids

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