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Author = Conlon, Michael;
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Displaying Results 1 - 25 of 75 on page 1 of 3
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A Clustering Approach to Domestic Electricity Load Profile Characterisation Using Smart Metering Data
(2015)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
A Clustering Approach to Domestic Electricity Load Profile Characterisation Using Smart Metering Data
(2015)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
Abstract:
The availability of increasing amounts of data to electricity utilities through the implementation of domestic smart metering campaigns has meant that traditional ways of analysing meter reading information such as descriptive statistics has become increasingly difficult. Key characteristic information to the data is often lost, particularly when averaging or aggregation processes are applied. Therefore, other methods of analysing data need to be used so that this information is not lost. One such method which lends itself to analysing large amounts of information is data mining. This allows for the data to be segmented before such aggregation processes are applied. Moreover, segmentation allows for dimension reduction thus enabling easier manipulation of the data. Clustering methods have been used in the electricity industry for some time. However, their use at a domestic level has been somewhat limited to date. This paper investigates three of the most widely used unsupervised clu...
https://arrow.dit.ie/dubenart/57
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A new configuration and control of doubly fed induction generator (UPQC-WG)
(2008)
Jayanti, N. G.; Basu, Malabika; Gaughan, Kevin; Conlon, Michael
A new configuration and control of doubly fed induction generator (UPQC-WG)
(2008)
Jayanti, N. G.; Basu, Malabika; Gaughan, Kevin; Conlon, Michael
Abstract:
The paper presents detailed simulation based analysis and investigation on grid code compliance of a new configuration of a 2 MW doubly fed induction generator. The converters of DFIG are connected and controlled to function like a unified power quality conditioner (UPQC). One of the converters is connected in series with the stator terminals and acts to maintain the stator voltage at a predetermined value. It can also transfer power to or from the rotor side converter through the common DC link. The other converter is connected to the rotor like a conventional DFIG and is controlled to maintain appropriate rotor currents to establish the operating point based on the input mechanical torque and reactive power set point at the grid connection. The generator performs satisfactorily under steady state and grid fault condition both in the super and sub synchronous speed range. The newly designed machine is Irish grid code compliant.
https://arrow.dit.ie/engscheleart/107
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A New Placement and Integration Method of UPQC to Improve the Power Quality in DG Network
(2013)
Khadem, Shafiuzzaman K.; Basu, Malabika; Conlon, Michael
A New Placement and Integration Method of UPQC to Improve the Power Quality in DG Network
(2013)
Khadem, Shafiuzzaman K.; Basu, Malabika; Conlon, Michael
Abstract:
A new proposal for the placement and integration of UPQC in DG connected microgrid/micro generation (μG) system has been presented here. DG converters (with storage), the load and shunt part of the UPQC will be placed at or after the PCC. The series part of the UPQC will be placed before the PCC and in series with the grid. DC link can be connected to the storage system also. Hence, it is termed UPQCμG. The advantages of the proposed UPQCμG over the normal UPQC are to compensate voltage interruptions in addition to voltage sags / swells, harmonic and reactive power compensation in the interconnected mode. The DG Converter with storage will supply the active power only and the shunt part of the UPQC will compensate the reactive and harmonic power of the load in the islanding mode. Therefore, the system can work both in interconnected and islanded mode. DG Converter does not require to be disconnected during the voltage disturbance. In all conditions, DG Converter will only provide th...
https://arrow.dit.ie/engscheleart/217
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A Parametric Analysis of Domestic Electricity Consumption Patterns in Ireland
(2011)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
A Parametric Analysis of Domestic Electricity Consumption Patterns in Ireland
(2011)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
Abstract:
This paper reports findings from a study of electrical load profiles obtained from a survey of a representative cross section of approximately 4,000 Irish dwellings. Electricity demand was recorded at half-hourly intervals for each dwelling over a six month period from 1st July 2009 to 31st December 2009. Descriptive statistics are shown for each electrical parameter such as mean, maximum demand, load factor and time of use (ToU) of electricity consumption. The mean power demand and daily mean load factor of the sample was 0.512kW and 23.43% respectively for all dwellings over the monitoring period. A mean daily maximum demand of 2.5kW was recorded for the sample. The most frequent ToU for maximum and minimum electricity consumption over the monitoring period was 18:00 - 18:30 and 06:30 – 07:00 respectively.
https://arrow.dit.ie/dubencon2/65
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A Review of Existing Microgrid Architectures
(2013)
Mariam, Lubna; Basu, Malabika; Conlon, Michael
A Review of Existing Microgrid Architectures
(2013)
Mariam, Lubna; Basu, Malabika; Conlon, Michael
Abstract:
The future electricity network must be flexible, accessible, reliable, and economic according to the worldwide smartgrid initiative. This is also echoed by the Sustainable Energy Authority of Ireland (SEAI) and European Electricity Grid Initiative (EEGI). In order to facilitate these objectives and to reduce green house gas (GHG) emission, research on various configurations of microgrid system is gaining importance, particularly with high penetration of renewable energy sources. Depending on the resource availability, geographical locations, load demand, and existing electrical transmission and distribution system, uG can be either connected to 6the grid or can work in an autonomous mode. Storage can also be a part of the uG architecture. This paper presents a critical literature review of various uG architectures. The benefits of grid-connected or isolated uG with storage have also been identified.
https://arrow.dit.ie/engscheleart2/83
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A Review of Parallel Operation of Active Power Filters in the Distributed Generation System
(2011)
Khadem, Shafiuzzaman Khan; Basu, Malabika; Conlon, Michael
A Review of Parallel Operation of Active Power Filters in the Distributed Generation System
(2011)
Khadem, Shafiuzzaman Khan; Basu, Malabika; Conlon, Michael
Abstract:
In this paper a technical review of parallel operation of Active Power Filter (APF) for harmonic power compensation in distributed generation (DG) network has been presented. Controlling methods and connection topologies with their pros and cons are described. Recent improvements in controlling and future trends for the application of APFs in distributed mode are also identified.
https://arrow.dit.ie/engscheleart/168
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Advances in the Quantification of Turbulence: a Wind Resource Characteristic
(2013)
Woolmington, Thomas; Sunderland, Keith; Blackledge, Jonathan; Conlon, Michael
Advances in the Quantification of Turbulence: a Wind Resource Characteristic
(2013)
Woolmington, Thomas; Sunderland, Keith; Blackledge, Jonathan; Conlon, Michael
Abstract:
Wind resource assessment is a critical parameter in a diverse range of considerations within the built environment. Engineers and scientists, engaging in building design, energy conservation/application and air-quality/air-pollution control measures, need to be cognisant of how the associated wind resource imposes increased complexities in their design and modelling processes. In this regard, the topographical heterogeneities within these environments, present significant challenges to quantifying the resource and its turbulent characteristics. Indeed, from the perspective of assessing the wind resource within the built environment, topographical heterogeneity is the primary proponent of turbulence and the main inhibitor to acquiring meaningful measurements. This paper presents two aspects of turbulence assessment within the built environment. Firstly, an analysis of how turbulence is quantified is considered. The industry standard, turbulent intensity (TI) [1] is compared with a pr...
https://arrow.dit.ie/engscheleart/202
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AN EXAMINATION OF THE POTENTIAL FOR DISTRIBUTED WIND GENERATION (DwG) IN URBAN DISTRIBUTION NETWORKS
(2015)
Sunderland, Keith; Woolmington, Thomas; Conlon, Michael; Mills, Gerald
AN EXAMINATION OF THE POTENTIAL FOR DISTRIBUTED WIND GENERATION (DwG) IN URBAN DISTRIBUTION NETWORKS
(2015)
Sunderland, Keith; Woolmington, Thomas; Conlon, Michael; Mills, Gerald
Abstract:
In a sustainable economy, smarter cities need energy networks that can deliver consistent electricity while maximising the use of intermittent renewables. Therefore an understanding of the available resource and a means for viable integration of distributed generation (DG) is required. In this research, energy harvesting of the wind climate is considered in the context of distributed wind generation (DwG) as an integral component of a smarter electricity network. The approach combines wind climate modeling of the resource at the urban scale with enhanced electricity network simulation. The former considers energy harvesting potential while the latter investigates the opportunities for this form of renewable electricity.
https://arrow.dit.ie/engscheleart/235
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Analysing Domestic Electricity Smart Metering Data Using Self Organising Maps
(2012)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
Analysing Domestic Electricity Smart Metering Data Using Self Organising Maps
(2012)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
Abstract:
This paper investigates a method of classifying domestic electricity load profiles through Self Organising Maps (SOMs). Approximately four thousand customers are divided into groups based on their electricity demand patterns. Dwelling and occupant characteristics are then investigated for each group. The results show that SOMs are an effective way of classifying customers into groups in terms of their electrical load profile and that certain dwelling and occupant characteristics are significant factors in determining which group they end up in.
https://arrow.dit.ie/dubencon2/68
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ANALYSIS OF A VARIABLE SPEED DOUBLE-FED INDUCTION GENERATOR WIND TURBINE DURING NETWORK VOLTAGE UNBALANCE CONDITIONS.
(2007)
Kearney, Joseph; Conlon, Michael
ANALYSIS OF A VARIABLE SPEED DOUBLE-FED INDUCTION GENERATOR WIND TURBINE DURING NETWORK VOLTAGE UNBALANCE CONDITIONS.
(2007)
Kearney, Joseph; Conlon, Michael
Abstract:
The behaviour of Double-Fed Induction Generators to supply network voltage unbalance is investigated. The paper shows the effects that voltage unbalance can have on a DFIG, using Matlab/Simulink. The results from simulations show that voltage unbalance affects both the induction generator and the rotor converter, due to the high unbalanced currents generated. The ability to modify the control strategy of a DFIG to compensate for voltage unbalance is outlined and simulations show the improvements to the performance of the DFIG.
https://arrow.dit.ie/engscheleart/219
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Analysis of Compensation Techniques Applied to the Control of Converter Connected Synchronous Wind Turbines and DFIG’s During Grid Disturbances.
(2012)
Kearney, Joseph; Conlon, Michael; Coyle, Eugene
Analysis of Compensation Techniques Applied to the Control of Converter Connected Synchronous Wind Turbines and DFIG’s During Grid Disturbances.
(2012)
Kearney, Joseph; Conlon, Michael; Coyle, Eugene
Abstract:
This paper investigates control schemes to improve the performance of converter connected synchronous generators and DFIG’s to grid voltage unbalance and grid faults. Both the synchronous generator with a full converter and a DFIG are modelled in Matlab/Simulink. The control schemes of both turbines are modified to improve their performance during grid disturbances including grid voltage unbalance and single-phase faults. These disturbances are introduced into the models at specific times to analyse the performance of the wind generation systems. The performances of both systems to the grid disturbances are compared and the results are analysed.
https://arrow.dit.ie/engscheleart/226
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Analysis of Converter Connected Synchronous Wind Turbines to Grid Disturbances.
(2011)
Kearney, Joseph; Conlon, Michael; Coyle, Eugene
Analysis of Converter Connected Synchronous Wind Turbines to Grid Disturbances.
(2011)
Kearney, Joseph; Conlon, Michael; Coyle, Eugene
Abstract:
This paper investigates the performance of synchronous generators to grid voltage unbalance and grid faults. A Model of a synchronous generator with a full converter is implemented in the SimPowerSystems toolbox in Matlab/Simulink. Methods to modify the converter control schemes to improve the synchronous generator systems response to grid voltage unbalance and grid faults are investigated. Grid faults including grid voltage unbalance, and line-to-ground faults are introduced into the model at specific times to analyse the performance of the wind generation system. Improvements in the performance of the synchronous generator WECS to the grid disturbances are illustrated.
https://arrow.dit.ie/engscheleart/225
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Assessing the Benefits of Compressed Air Energy Storage on the 2020 Irish Power System
(2013)
Cleary, Brendan; Duffy, Aidan; O'Connor, Alan; Conlon, Michael; Fthenakis, Vasilis
Assessing the Benefits of Compressed Air Energy Storage on the 2020 Irish Power System
(2013)
Cleary, Brendan; Duffy, Aidan; O'Connor, Alan; Conlon, Michael; Fthenakis, Vasilis
Abstract:
Power systems have evolved as countries implement energy policies focusing on energy efficiency and increased share of renewable energy sources (RES). At the forefront is non-dispatchable generation such as wind and solar. Traditionally power systems were designed for fully dispatchable generating plant. However, these powers systems are under additional pressure due to the variable operational characteristics of RES. Consequently, capital investments in grid reinforcement, interconnection, additional gas generators and smart grid initiatives have been proposed and implemented. Moreover, an increased interest in energy storage technologies has evolved due to their various economic and operational benefits to power systems. Current compressed air energy storage (CAES) plants have shown economic feasibility and reliability. Thus, the main focus of this paper is to investigate and compare two scenarios; one without CAES and a second with CAES as an additional generator in the 2020 Iris...
https://arrow.dit.ie/dubencon2/71
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Assessing the Economic Benefits of Compressed Air Energy Storage for Mitigating Wind Curtailment
(2015)
Cleary, Brendan; Duffy, Aidan; O'Connor, Alan; Conlon, Michael; Fthenakis, Vasilis
Assessing the Economic Benefits of Compressed Air Energy Storage for Mitigating Wind Curtailment
(2015)
Cleary, Brendan; Duffy, Aidan; O'Connor, Alan; Conlon, Michael; Fthenakis, Vasilis
Abstract:
Renewable energy generation in the All-Island of Ireland (AII) is set to increase by 2020 due to binding renewable energy targets. To achieve these targets, there will be periods of time when 75% of electricity will be generated mainly from onshore wind. Currently, the AII system can accommodate a 50% maximum permissible instantaneous level of wind generation. The system operators must make system wide wind curtailment decisions to ensure this level is not breached. Subsequently, the ability to limit wind curtailment using large scale energy storage such as pumped hydroelectric energy storage and compressed air energy storage (CAES) is increasingly being scrutinized as a viable option. Thus, the aims of this paper are to estimate the level of wind curtailment on the 2020 AII system for various scenarios including with and without CAES; assess and quantify the revenue loss due to wind curtailment using power systems simulation software PLEXOS
https://arrow.dit.ie/dubencon/3
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Battery Energy Storage System (BESS) Based Photovoltaic Charging Station (PV-CS) For A Green University Transportation
(2016)
Esfandyari, Ayda; Świerc, Agata; Norton, Brian; Conlon, Michael; McCormack, Sarah
Battery Energy Storage System (BESS) Based Photovoltaic Charging Station (PV-CS) For A Green University Transportation
(2016)
Esfandyari, Ayda; Świerc, Agata; Norton, Brian; Conlon, Michael; McCormack, Sarah
Abstract:
With the trends encouraged by governments and political parties to increase the adoption of Renewable Energy Sources (RES); solar energy, and in particular photovoltaics (PV), is poised as an excellent candidate to offset the energy requirements of charging stations (PV-CS) for Electric Vehicles (BEV). This work presents a 10.5 kW Transient System Simulation (TRNSYS) model of a university campus PV-CS to determine sizing as well to determine the best operating strategies for a Battery Energy Storage System (BESS). The economical optimization model is formulated via theoretical approach adopting the Simple Payback Period (SPP) indicator. The optimization takes into account the campus transportation load profile while BESS is used to attain the shortest SPP gain. The results, from both theoretical as well as simulation approach, reveal that leveraging the campus BEVs charging via BESS based PV-CS scheme has the potential to reduce the energy demand from the grid, and to maximize self-...
https://arrow.dit.ie/dubencon2/80
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Capacity Enhancement and Flexible Operation of Unified Power Quality Conditioner in Smart and Microgrid Network
(2018)
Khan Khadem, Shafiuzzaman; Basu, Malabika; Conlon, Michael
Capacity Enhancement and Flexible Operation of Unified Power Quality Conditioner in Smart and Microgrid Network
(2018)
Khan Khadem, Shafiuzzaman; Basu, Malabika; Conlon, Michael
Abstract:
This paper presents a new approach to design Unified Power Quality Conditioner (UPQC), termed as distributed UPQC (D-UPQC), for smart or microgrid network where capacity enhancement and flexible operation of UPQC are the important issues. This paper shows the possibility of capacity enhancement and operational flexibility of UPQC through a coordinated control of existing resources. This UPQC consists of a single unit series active power filter (APFse) and multiple shunt APF (APFsh) units in a distributed (parallel) mode. These units can be connected with a common/separate dc linked capacitor(s). The requirement of capacity enhancement arises from the flexibility to cope up with the increased harmonic load demand at low voltage (LV) distribution network. This can be accomplished by a coordinated control where multiple APFsh units are operated by utilizing the capacity of APFse while it is in idle/low mode using. Operational flexibility can be accomplished by compensating (i) the reac...
https://arrow.dit.ie/dubenrep/3
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Characterising Domestic Electricity Consumption Patterns by Dwelling and Occupant Socio-economic Variables: an Irish Case Study
(2012)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
Characterising Domestic Electricity Consumption Patterns by Dwelling and Occupant Socio-economic Variables: an Irish Case Study
(2012)
McLoughlin, Fintan; Duffy, Aidan; Conlon, Michael
Abstract:
This paper examines the influence of dwelling and occupant characteristics on domestic electricity consumption patterns by analysing data obtained from a smart metering survey of a representative cross section of approximately 4,200 domestic Irish dwellings. A multiple linear regression model was applied to four parameters: total electricity consumption, maximum demand, load factor and time of use (ToU) of maximum electricity demand for a number of different dwelling and occupant socio-economic variables. In particular, dwelling type, number of bedrooms, head of household (HoH) age, household composition, social class, water heating and cooking type all had a significant influence over total domestic electricity consumption. Maximum electricity demand was significantly influenced by household composition as well as water heating and cooking type. A strong relationship also existed between maximum demand and most household appliances but, in particular, tumble dryers, dishwashers and...
https://arrow.dit.ie/dubenart/50
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Community Microgrid Based on Micro-Wind Generation System
(2013)
Mariam, Lubna; Basu, Malabika; Conlon, Michael
Community Microgrid Based on Micro-Wind Generation System
(2013)
Mariam, Lubna; Basu, Malabika; Conlon, Michael
Abstract:
Penetration of renewable energy sources (such as solar/wind) are being explored mostly as micro power generation (μGen) or mega power plant system. In recent years, emphasis has been given on Microgrid (μGrid) systems because of their few advantages over μGen systems in terms of power quality, stability, reliability, economics etc. But the commercial installation of the μGrid system is not yet progressing significantly. This paper presents the techno-economic aspects of μGen and μGrid systems towards the development of grid connected community based μGrid (C-μGrid) system. Emphasis has been given to identify the benefits of the μGrid over the μGen system. As a case study, wind energy μGen based C-μGrid system has been considered. Ireland has been chosen as a geographical location where wind power based μGen system is not yet very popular with present REFIT (Renewable Energy Feed-in-Tariff) policy. To discuss the issues, techno-economic analysis has been performed for both the system...
https://arrow.dit.ie/engscheleart/212
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Comparative Field Performance Study of Flat Plate and Heat Pipe Evacuated Tube Collectors (ETCs) for Domestic Water Heating Systems in a Temperate Climate
(2011)
Ayompe, Lacour; Duffy, Aidan; McCormack, Sarah; McKeever, Mick; Conlon, Michael
Comparative Field Performance Study of Flat Plate and Heat Pipe Evacuated Tube Collectors (ETCs) for Domestic Water Heating Systems in a Temperate Climate
(2011)
Ayompe, Lacour; Duffy, Aidan; McCormack, Sarah; McKeever, Mick; Conlon, Michael
Abstract:
This paper presents a year round energy performance monitoring results of two solar water heaters with 4 m2 flat plate and 3 m2 heat pipe evacuated tube collectors (ETCs) operating under the same weather conditions in Dublin, Ireland. The energy performance of the two systems was compared on daily, monthly and yearly basis. Results obtained showed that for an annual total in-plane solar insolation of 1,087 kWh/m2, a total of 1,984 kWh and 2,056 kWh of heat energy were collected by the 4 m2 FPC and 3 m2 ETC systems respectively. Over the year, a unit area of the FPC and ETC each generated 496 kWh/m2 and 681 kWh/m2 of heat respectively. For 3149.7 kWh and 3053.6 kWh of auxiliary energy supplied to the FPC and ETC systems their annual solar fractions (SFs) were 38.6% and 40.2% respectively. The annual average collector efficiencies were 46.1% and 60.7% while the system efficiencies were 37.9% and 50.3% respectively for the FPC and ETC respectively. Economic analysis showed that both so...
https://arrow.dit.ie/engschcivart/23
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Control of Double Fed Induction Generator Wind Turbine During Network Voltage Unbalance Conditions
(2008)
Kearney, Joseph; Conlon, Michael
Control of Double Fed Induction Generator Wind Turbine During Network Voltage Unbalance Conditions
(2008)
Kearney, Joseph; Conlon, Michael
Abstract:
The behaviour of Double-Fed Induction Generators to supply network voltage unbalance is investigated. The paper describes a method to control the rotor-side converter in a DFIG when subjected to the effects of network voltage unbalance conditions. A parallel control scheme is implemented to control the positive and negative sequence components independently. A DFIG model is implemented in Matlab/Simulink and simulations show the reduction in power and torque oscillations and a reduction in the high unbalanced currents generated as a result of the applied voltage unbalance.
https://arrow.dit.ie/engscheleart/220
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Development and Implementation of a Simplified Residential Energy Asset Rating Model
(2013)
Reilly, Daire; Duffy, Aidan; Conlon, Michael; Willis, David
Development and Implementation of a Simplified Residential Energy Asset Rating Model
(2013)
Reilly, Daire; Duffy, Aidan; Conlon, Michael; Willis, David
Abstract:
In accordance with national and European policies, the provision of financial assistance to residential energy consumers has led to a greater awareness of and interest in energy retrofit technologies. However, at present Irish energy consumers have no appropriate advice on the future performance of retrofit options available to them. This is a significant limitation to decision making and technology uptake, since this group need to know whether their investment is likely to be worthwhile. The asset rating methodology developed for the certification of energy performance of buildings is the current industry standard of prediction of energy demand and post retrofit performance. The methodology is tedious and may not be viable for ESCos to send trained assessors to residential dwellings while residential customers do not possess the technical knowledge to complete the survey of their own dwelling. This research investigates if the asset rating procedure can be simplified to permit deve...
https://arrow.dit.ie/engschcivoth/14
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Development of a 12 kVA DSP-Controlled Laboratory Prototype UPQC
(2010)
Axente, Iurie; Navilgone Ganesh, Jayanti; Basu, Malabika; Conlon, Michael; Gaughan, Kevin
Development of a 12 kVA DSP-Controlled Laboratory Prototype UPQC
(2010)
Axente, Iurie; Navilgone Ganesh, Jayanti; Basu, Malabika; Conlon, Michael; Gaughan, Kevin
Abstract:
This paper reports the development of a laboratory prototype of a fully digital DSP-controlled 12-kVA unified power quality conditioner (UPQC), capable of compensating for both the supply voltage and the load current imperfections. A fully digital controller based on the TMS320F2812 DSP platform is implemented for the reference generation as well as control purposes. The delay problem in the digital controller is overcome by application of a fast DSP, a compact control technique and proper flow of control steps in the DSP software. A phase-locked loopless software grid synchronization method has been implemented for the effective operation of the UPQC under conditions of grid frequency variation. A sequence-based compensation strategy has been developed to compensate for balanced and unbalanced sags while accommodating the fact that the voltage injection capability of the UPQC is limited. The prototype UPQC power circuit, control features, and control algorithm along with experiment...
https://arrow.dit.ie/engscheleart2/6
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Development of laboratory prototype of a 12kVA digital shunt active filter
(2008)
Jayanti, N. G.; Basu, Malabika; Axente, Iurie; Gaughan, Kevin; Conlon, Michael
Development of laboratory prototype of a 12kVA digital shunt active filter
(2008)
Jayanti, N. G.; Basu, Malabika; Axente, Iurie; Gaughan, Kevin; Conlon, Michael
Abstract:
The paper reports the development of a laboratory prototype of a fully digital DSP controlled 12 kVA Shunt Active Filter (ShAF) capable of compensating for non-linear, unbalanced load and reactive power. A fully digital controller is implemented for the reference generation and the current control purposes. The delay problem in digital current controller is overcome by application of a fast DSP, a compact controller and proper flow of control steps in the DSP software. A Phase Locked Loop (PLL)-less software grid synchronization method has been proposed for the effective operation of the ShAF under the grid frequency variation. The source current THD has been improved from 15.8% to 4.45%. The control features, experimental setup, and results are presented in the paper.
https://arrow.dit.ie/engscheleart/109
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Dynamic Electrical Ratings and the Economics of Capacity Factor for Wave Energy Converter Arrays
(2011)
Sharkey, Fergus; Bannon, Elva; Conlon, Michael; Gaughan, Kevin
Dynamic Electrical Ratings and the Economics of Capacity Factor for Wave Energy Converter Arrays
(2011)
Sharkey, Fergus; Bannon, Elva; Conlon, Michael; Gaughan, Kevin
Abstract:
Wave Energy Converters (WECs) have been in development for several decades with some devices now coming close to commercial realities. As such, pilot projects are being developed, particularly in the UK and Ireland, to deploy WECs on a pre-commercial array scale. The ultimate ambition is to have multiple WECs installed in a ‘wave farm’ in a similar fashion to offshore wind farms. For large scale wind farms the inter-array and export electrical systems can represent more than 20% of the project’s capital expenditure. Submarine power cables account for a large proportion of this cost. The same is expected to hold true for wave farms. This paper investigates the possibility of underrating and dynamically rating the electrical inter-array and export cable systems for wave farms in order to assess the cost savings that can be made. This paper will also look at a simulated WEC array power output time series. The aim is to establish whether the electrical equipment, particularly submarine ...
https://arrow.dit.ie/engscheleart/167
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Economic and Environmental Performance Analysis of PV Systems for Domestic Applications in Ireland
(2009)
Ayompe, Lacour; Duffy, Aidan; McCormack, Sarah; Conlon, Michael
Economic and Environmental Performance Analysis of PV Systems for Domestic Applications in Ireland
(2009)
Ayompe, Lacour; Duffy, Aidan; McCormack, Sarah; Conlon, Michael
Abstract:
Long-term monthly average daily solar radiation values on horizontal surfaces at 20 locations in Ireland were used to model the performance of a 1.72 kWp grid-connected PV system. Global solar radiation on horizontal surfaces varied between 865.1 and 1,127.9 kWh/m2/yr with a mean of 947.9 kWh/m2/yr. Annual energy yields varied between 869 and 1,156 960 kWh/kWp with a mean of 960 kWh/kWp. The capacity factor for the PV system varied between 9.9 and 13.2% while the mean was 11.0%. System cost parameters, long-term annual average electricity domestic rate cost escalation were used to calculate the Net Present Value (NPV), cost of electricity production and simple payback period. The potential for greenhouse gas emission reduction was determined by calculating the quantity of CO2 emissions avoided annually as well as the cost of CO2 abatement from electricity generated using domestic scale PV systems in Ireland.
https://arrow.dit.ie/dubencon2/3
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