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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Analyzing Non-Functional Capabilities of ICT Infrastructures Supporting Power System Wide Area Monitoring and Control

Chenine, Moustafa January 2013 (has links)
The strain on modern electrical power systems has led to an ever-increasing utilization of new information and communication technologies (ICT) to improve their efficiency and reliability. Wide area monitoring and control (WAMC) systems offer many opportunities to improve the real-time situational awareness in the power system. These systems are essen-tially SCADA systems but with continuous streaming of measurement data from the power system. The quality of WAMC systems and the applications running on top of them are heavily, but not exclusively, dependent on the underlying non-functional quality of the ICT systems. From an ICT perspective, the real-time nature of WAMC systems makes them susceptible to variations in the quality of the supporting ICT systems. The non-functional qualities studied as part of this research are performance, interoperability and cyber security. To analyze the performance of WAMC ICT systems, WAMC applications were identified, and their requirements were elicited. Furthermore, simulation models capturing typical utility communication infrastructure architectures were implemented. The simulation studies were carried out to identify and characterize the latency in these systems and its impact on data quality in terms of the data loss. While performance is a major and desirable quality, other non-functional qualities such as interoperability and cyber security have a significant impact on the usefulness of the sys-tem. To analyze these non-functional qualities, an enterprise architecture (EA) based framework for the modeling and analysis of interoperability and cyber security, specialized for WAMC systems, is proposed. The framework also captures the impact of cyber security on the interoperability of WAMC systems. Finally, a prototype WAMC system was imple-mented to allow the validation of the proposed EA based framework. The prototype is based on existing and adopted open-source frameworks and libraries. The research described in this thesis makes several contributions. The work is a systematic approach for the analysis of the non-functional quality of WAMC ICT systems as a basis for establishing the suitability of ICT system architectures to support WAMC applications. This analysis is accomplished by first analyzing the impact of communication architectures for WAMC systems on the latency. Second, the impact of these latencies on the data quali-ty, specifically data currency (end to end delay of the phasor measurements) and data in-completeness (i.e., the percentage of phasor measurements lost in the communication), is analyzed. The research also provides a framework for interoperability and cyber security analysis based on a probabilistic Monte Carlo enterprise architecture method. Additionally, the framework captures the possible impact of cyber security on the interoperability of WAMC data flows. A final result of the research is a test bed where WAMC applications can be deployed and ICT architectures tested in a controlled but realistic environment. / <p>QC 20130218</p>
2

The development of a human-robot interface for industrial collaborative system

Tang, Gilbert 04 1900 (has links)
Industrial robots have been identified as one of the most effective solutions for optimising output and quality within many industries. However, there are a number of manufacturing applications involving complex tasks and inconstant components which prohibit the use of fully automated solutions in the foreseeable future. A breakthrough in robotic technologies and changes in safety legislations have supported the creation of robots that coexist and assist humans in industrial applications. It has been broadly recognised that human-robot collaborative systems would be a realistic solution as an advanced production system with wide range of applications and high economic impact. This type of system can utilise the best of both worlds, where the robot can perform simple tasks that require high repeatability while the human performs tasks that require judgement and dexterity of the human hands. Robots in such system will operate as “intelligent assistants”. In a collaborative working environment, robot and human share the same working area, and interact with each other. This level of interface will require effective ways of communication and collaboration to avoid unwanted conflicts. This project aims to create a user interface for industrial collaborative robot system through integration of current robotic technologies. The robotic system is designed for seamless collaboration with a human in close proximity. The system is capable to communicate with the human via the exchange of gestures, as well as visual signal which operators can observe and comprehend at a glance. The main objective of this PhD is to develop a Human-Robot Interface (HRI) for communication with an industrial collaborative robot during collaboration in proximity. The system is developed in conjunction with a small scale collaborative robot system which has been integrated using off-the-shelf components. The system should be capable of receiving input from the human user via an intuitive method as well as indicating its status to the user ii effectively. The HRI will be developed using a combination of hardware integrations and software developments. The software and the control framework were developed in a way that is applicable to other industrial robots in the future. The developed gesture command system is demonstrated on a heavy duty industrial robot.
3

Wide area monitoring and control systems - application communication requirements and simulation

Chenine, Moustafa January 2009 (has links)
<p>Today’s electrical transmission & distribution systems, are facing a number of challenges related to changing environmental, technical and business factors. Among these factors are, increased environmental restrictions leading to higher share of production from renewable and uncontrollable sources as well as local environmental concerns regarding construction of new transmission and distribution lines. The re-regulation of the electricity market has created a dynamic environment in which multiple organizations have to coordinate and cooperate in the operation and control of the power system. Finally, the high rate of devel-opment within the ICT field is creating many new opportunities for power system opera-tion and control, thanks to introduction of new technologies for measurement, communi-cation and automation.</p><p>As a result of these factors, Wide Area Monitoring and Control (WAMC) systems have been proposed. WAMC systems utilize new ICT based technologies to offer more accurate and timely data on the state of the power system. WAMC systems utilize Phasor Measure-ment Units (PMUs) that have higher data rates and are time synchronised using, GPS satel-lites. This allows synchronized observation of the dynamics of the power system, making it possible to manage the system at a more efficient and responsive level and apply wide area control and protection schemes. The success WAMC systems, on the other hand, are largely dependent on the performance of the Information and Communication Technology (ICT) infrastructure that would support them.</p><p>This thesis investigates the requirements on, and suitability of the ICT systems that support WAMC systems. This was done by identifying WAMC applications and the elicitation of their requirements. Furthermore, a set of simulation projects were carried out to determine the communication system characteristics such as delay and the impact of this delay on the WAMC system.</p><p>This thesis has several contributions. First, it provides summary and analysis of WAMC application priorities and requirements in the Nordic region. Secondly it provides simula-tion based comparison and evaluation of communication paradigms for WAMC systems. The research documented in this thesis addresses these paradigms by providing a compari-son and evaluation through simulation. Thirdly, the thesis provides insight to the possible sources of delay in WAMC architecture and the impact of these delays on data quality specifically data incompleteness. This provides insight on what applications are important to practitioners and what is the expected performance of these applications, as seen from the power system control and operation point of view.</p>
4

Data Quality in Wide-Area Monitoring and Control Systems : PMU Data Latency, Completness, and Design of Wide-Area Damping Systems

Zhu, Kun January 2013 (has links)
The strain on modern electrical power system operation has led to an ever increasing utilization of new Information Communication Technology (ICT) systems to enhance the reliability and efficiency of grid operation. Among these proposals, Phasor Measurement Unit (PMU)-based Wide-Area Monitoring and Control (WAMC) systems have been recognized as one of the enablers of “Smart Grid”, particularly at the transmission level, due to their capability to improve the real-time situational awareness of the grid. These systems differ from the conventional Supervisory Control And Data Acquisition (SCADA) systems in that they provide globally synchronized measurements at high resolutions. On the other hand, the WAMC systems also impose several stringent requirements on the underlying ICT systems, including performance, security, and availability, etc. As a result, the functionality of the WAMC applications is heavily, but not exclusively, dependent on the capabilities of the underlying ICT systems. This tight coupling makes it difficult to fully exploit the benefits of the synchrophasor technology without the proper design and configuration of ICT systems to support the WAMC applications. The strain on modern electrical power system operation has led to an ever increasing utilization of new Information Communication Technology (ICT) systems to enhance the reliability and efficiency of grid operation. Among these proposals, Phasor Measurement Unit (PMU)-based Wide-Area Monitoring and Control (WAMC) systems have been recognized as one of the enablers of “Smart Grid”, particularly at the transmission level, due to their capability to improve the real-time situational awareness of the grid. These systems differ from the conventional Supervisory Control And Data Acquisition (SCADA) systems in that they provide globally synchronized measurements at high resolutions. On the other hand, the WAMC systems also impose several stringent requirements on the underlying ICT systems, including performance, security, and availability, etc. As a result, the functionality of the WAMC applications is heavily, but not exclusively, dependent on the capabilities of the underlying ICT systems. This tight coupling makes it difficult to fully exploit the benefits of the synchrophasor technology without the proper design and configuration of ICT systems to support the WAMC applications. In response to the above challenges, this thesis addresses the dependence of WAMC applications on the underlying ICT systems. Specifically, two of the WAMC system data quality attributes, latency and completeness, are examined together with their effects on a typical WAMC application, PMU-based wide-area damping systems. The outcomes of this research include quantified results in the form of PMU communication delays and data frame losses, and probability distributions that can model the PMU communication delays. Moreover, design requirements are determined for the wide-area damping systems, and three different delay-robust designs for this WAMC application are validated based on the above results. Finally, a virtual PMU is developed to perform power system and communication network co-simulations. The results reported by this thesis offer a prospect for better predictions of the performance of the supporting ICT systems in terms of PMU data latency and completeness. These results can be further used to design and optimize the WAMC applications and their underlying ICT systems in an integrated manner. This thesis also contributes a systematic approach to design the wide-area damping system considering the PMU data latency and completeness. Finally, the developed virtual PMU, as part of a co-simulation platform, provides a means to investigate the dependence of WAMC applications on the capabilities of the underlying ICT systems in a cost-efficient manner. / <p>QC 20131015</p>
5

The development of a human-robot interface for industrial collaborative system

Tang, Gilbert January 2016 (has links)
Industrial robots have been identified as one of the most effective solutions for optimising output and quality within many industries. However, there are a number of manufacturing applications involving complex tasks and inconstant components which prohibit the use of fully automated solutions in the foreseeable future. A breakthrough in robotic technologies and changes in safety legislations have supported the creation of robots that coexist and assist humans in industrial applications. It has been broadly recognised that human-robot collaborative systems would be a realistic solution as an advanced production system with wide range of applications and high economic impact. This type of system can utilise the best of both worlds, where the robot can perform simple tasks that require high repeatability while the human performs tasks that require judgement and dexterity of the human hands. Robots in such system will operate as “intelligent assistants”. In a collaborative working environment, robot and human share the same working area, and interact with each other. This level of interface will require effective ways of communication and collaboration to avoid unwanted conflicts. This project aims to create a user interface for industrial collaborative robot system through integration of current robotic technologies. The robotic system is designed for seamless collaboration with a human in close proximity. The system is capable to communicate with the human via the exchange of gestures, as well as visual signal which operators can observe and comprehend at a glance. The main objective of this PhD is to develop a Human-Robot Interface (HRI) for communication with an industrial collaborative robot during collaboration in proximity. The system is developed in conjunction with a small scale collaborative robot system which has been integrated using off-the-shelf components. The system should be capable of receiving input from the human user via an intuitive method as well as indicating its status to the user ii effectively. The HRI will be developed using a combination of hardware integrations and software developments. The software and the control framework were developed in a way that is applicable to other industrial robots in the future. The developed gesture command system is demonstrated on a heavy duty industrial robot.
6

Wide area monitoring and control systems - application communication requirements and simulation

Chenine, Moustafa January 2009 (has links)
Today’s electrical transmission &amp; distribution systems, are facing a number of challenges related to changing environmental, technical and business factors. Among these factors are, increased environmental restrictions leading to higher share of production from renewable and uncontrollable sources as well as local environmental concerns regarding construction of new transmission and distribution lines. The re-regulation of the electricity market has created a dynamic environment in which multiple organizations have to coordinate and cooperate in the operation and control of the power system. Finally, the high rate of devel-opment within the ICT field is creating many new opportunities for power system opera-tion and control, thanks to introduction of new technologies for measurement, communi-cation and automation. As a result of these factors, Wide Area Monitoring and Control (WAMC) systems have been proposed. WAMC systems utilize new ICT based technologies to offer more accurate and timely data on the state of the power system. WAMC systems utilize Phasor Measure-ment Units (PMUs) that have higher data rates and are time synchronised using, GPS satel-lites. This allows synchronized observation of the dynamics of the power system, making it possible to manage the system at a more efficient and responsive level and apply wide area control and protection schemes. The success WAMC systems, on the other hand, are largely dependent on the performance of the Information and Communication Technology (ICT) infrastructure that would support them. This thesis investigates the requirements on, and suitability of the ICT systems that support WAMC systems. This was done by identifying WAMC applications and the elicitation of their requirements. Furthermore, a set of simulation projects were carried out to determine the communication system characteristics such as delay and the impact of this delay on the WAMC system. This thesis has several contributions. First, it provides summary and analysis of WAMC application priorities and requirements in the Nordic region. Secondly it provides simula-tion based comparison and evaluation of communication paradigms for WAMC systems. The research documented in this thesis addresses these paradigms by providing a compari-son and evaluation through simulation. Thirdly, the thesis provides insight to the possible sources of delay in WAMC architecture and the impact of these delays on data quality specifically data incompleteness. This provides insight on what applications are important to practitioners and what is the expected performance of these applications, as seen from the power system control and operation point of view.
7

Transparência na comunicação do sistema de remuneração: proposta de um instrumento de medida e identificação de fatores determinantes / Transparency in compensation system communication: a proposal for a measurement instrument and determinants factors identification.

Simões, Carina Labbate Maugé 11 November 2015 (has links)
Essa dissertação aborda o tema transparência na comunicação do sistema de remuneração aos funcionários (TCSR), que tem sido, por muito tempo, um assunto controverso nas empresas, sendo também considerado um dos tabus da nossa sociedade. O estudo desenvolveu um instrumento de mensuração da TCSR, bem como analisou como um conjunto de empresas no Brasil lida com a comunicação de suas práticas de remuneração e identificou fatores que influenciaram a decisão destas empresas quanto à maior ou menor transparência. Foi realizada uma revisão sistemática da literatura sobre o tema para dar consistência teórica ao desenvolvimento do instrumento de medida. Na etapa empírica, com o objetivo de validar e aprimorar o instrumento, foram realizadas dez entrevistas em profundidade, cinco delas com especialistas no tema de remuneração e em gestão de recursos humanos; e outras cinco com profissionais responsáveis pelo departamento de remuneração das empresas selecionadas. As entrevistas com os responsáveis pelo departamento de remuneração foram também utilizadas para um levantamento exploratório sobre como as empresas faziam a gestão da TCSR e os principais motivos que as levavam a adotar diferentes estratégias de comunicação com seus funcionários. Como resultado, considera-se que esse trabalho gerou uma alternativa promissora para medir as possíveis variações existentes nas práticas de comunicação do sistema de remuneração. O instrumento desenvolvido se restringe à parcela fixa da remuneração, que envolve salário base, aumento no salário base e análise de mercado. Quanto à postura das empresas pesquisadas frente à comunicação do sistema de remuneração, constatou-se que elas se mostram mais transparentes na divulgação de informações gerais sobre a estrutura de remuneração e seus critérios de funcionamento. Percebe-se também que as organizações suprem os gestores com informações sobre a remuneração de suas equipes, mas não é comum disponibilizar informações sobre a remuneração de outras equipes. O nível de transparência nas empresas declina quando se trata de comunicar para o funcionário informações específicas da estrutura remuneratória sobre o próprio profissional (ex. sua faixa salarial), ou sobre o cargo que representa seu próximo passo de carreira e, principalmente, sobre a remuneração dos demais cargos da empresa. Vale destacar que nenhuma das empresas pesquisadas divulga os salários dos funcionários para todo o quadro, limitando-se a informá-los unicamente ao gestor direto da equipe e àqueles que trabalham na própria área de RH. Por fim, foi possível identificar que os motivos que levam as empresas a serem mais transparentes na comunicação sobre remuneração são: estímulo a uma cultura organizacional participativa; crença no desenvolvimento do capital humano, manutenção de um clima organizacional positivo no que se refere à percepção de justiça dos critérios adotados para definição dos salários na empresa; a necessidade de alinhar as pessoas aos objetivos de negócio; a intenção de deixar claro que a empresa pratica salários acima do mercado. Já os fatores que influenciam as empresas a manterem sigilo sobre as práticas de remuneração foram: as organizações manterem uma cultura organizacional mais paternalista em que se acredita que as pessoas não têm condições de entender toda a complexidade envolvida no sistema de remuneração; a crença interna de que salários são confidenciais por definição; e, por fim, a necessidade de não divulgar inconsistências que persistem no sistema de remuneração para não fragilizar a imagem da empresa internamente. / This dissertation addresses the issue of transparency in compensation system communication to employees (TCSC), which has been, for a long time, a controversial issue in the companies, and is also considered one of the taboos of our society. The study developed a measurement instrument for TCSC, as well as analyzed how a group of companies in Brazil handles the communication of its compensation practices and identified factors that influence the decision of these companies as the greater or lesser transparency. A systematic review of literature on the subject was held to give theoretical consistency to the development of the measurement instrument. In the empirical step, in order to validate and refine the instrument, ten in-depth interviews were performed, five of them with experts on the subject of compensation and human resources management; and five with professionals responsible for the selected companies compensation department. Interviews with those responsible for the compensation department were also used for an exploratory research on how companies were managing TCSC and the main reasons that led to adopt different communication strategies with their employees. As a result, it is considered that this paperwork has generated a promising alternative to measure the possible variations existing in the compensation system practices communication. The instrument developed is limited to the fixed part of compensation that involves base salary, its increase and market analysis. As for the attitude of the companies researched about the compensation system communication, it was found that they are more transparent in the disclosure of general information about the compensation structure and its operating criteria. It is also noticed that organizations supply managers with information of their staff\'s compensation, but it is not common to provide information of other teams\' compensation. The companies\' level of transparency declines when it involves communicating to employees specific compensation structure information about the professional itself (for example, their salary range), or the position that represents the next step in employee\'s career and, especially, on the remuneration of other positions in the company. We must emphasize that none of the analyzed companies disclose for all staff the amounts of individual wages, this information is restricted only to direct manager of the team and HR staff. Finally, it was possible to identify the reasons that lead companies to be more transparent in the compensation communication: the encouragement of a participatory organizational culture; belief in the development of human capital, maintaining a positive organizational climate as it relates to the perceived fairness of the criteria adopted for the wages definition in the company; the need to align people to business goals; intent to make clear that the company is paying above-market wages. The factors that influence companies to maintain the secrecy of the compensation practices were: organizations maintenance of more paternalistic organizational culture in which it is believed that people is not able to understand all the complexity involved in the compensation system; the internal belief that wages are confidential by definition; and, finally, the necessity not to disclose inconsistencies that persist in the compensation system to not undermine the company\'s internal image
8

Transparência na comunicação do sistema de remuneração: proposta de um instrumento de medida e identificação de fatores determinantes / Transparency in compensation system communication: a proposal for a measurement instrument and determinants factors identification.

Carina Labbate Maugé Simões 11 November 2015 (has links)
Essa dissertação aborda o tema transparência na comunicação do sistema de remuneração aos funcionários (TCSR), que tem sido, por muito tempo, um assunto controverso nas empresas, sendo também considerado um dos tabus da nossa sociedade. O estudo desenvolveu um instrumento de mensuração da TCSR, bem como analisou como um conjunto de empresas no Brasil lida com a comunicação de suas práticas de remuneração e identificou fatores que influenciaram a decisão destas empresas quanto à maior ou menor transparência. Foi realizada uma revisão sistemática da literatura sobre o tema para dar consistência teórica ao desenvolvimento do instrumento de medida. Na etapa empírica, com o objetivo de validar e aprimorar o instrumento, foram realizadas dez entrevistas em profundidade, cinco delas com especialistas no tema de remuneração e em gestão de recursos humanos; e outras cinco com profissionais responsáveis pelo departamento de remuneração das empresas selecionadas. As entrevistas com os responsáveis pelo departamento de remuneração foram também utilizadas para um levantamento exploratório sobre como as empresas faziam a gestão da TCSR e os principais motivos que as levavam a adotar diferentes estratégias de comunicação com seus funcionários. Como resultado, considera-se que esse trabalho gerou uma alternativa promissora para medir as possíveis variações existentes nas práticas de comunicação do sistema de remuneração. O instrumento desenvolvido se restringe à parcela fixa da remuneração, que envolve salário base, aumento no salário base e análise de mercado. Quanto à postura das empresas pesquisadas frente à comunicação do sistema de remuneração, constatou-se que elas se mostram mais transparentes na divulgação de informações gerais sobre a estrutura de remuneração e seus critérios de funcionamento. Percebe-se também que as organizações suprem os gestores com informações sobre a remuneração de suas equipes, mas não é comum disponibilizar informações sobre a remuneração de outras equipes. O nível de transparência nas empresas declina quando se trata de comunicar para o funcionário informações específicas da estrutura remuneratória sobre o próprio profissional (ex. sua faixa salarial), ou sobre o cargo que representa seu próximo passo de carreira e, principalmente, sobre a remuneração dos demais cargos da empresa. Vale destacar que nenhuma das empresas pesquisadas divulga os salários dos funcionários para todo o quadro, limitando-se a informá-los unicamente ao gestor direto da equipe e àqueles que trabalham na própria área de RH. Por fim, foi possível identificar que os motivos que levam as empresas a serem mais transparentes na comunicação sobre remuneração são: estímulo a uma cultura organizacional participativa; crença no desenvolvimento do capital humano, manutenção de um clima organizacional positivo no que se refere à percepção de justiça dos critérios adotados para definição dos salários na empresa; a necessidade de alinhar as pessoas aos objetivos de negócio; a intenção de deixar claro que a empresa pratica salários acima do mercado. Já os fatores que influenciam as empresas a manterem sigilo sobre as práticas de remuneração foram: as organizações manterem uma cultura organizacional mais paternalista em que se acredita que as pessoas não têm condições de entender toda a complexidade envolvida no sistema de remuneração; a crença interna de que salários são confidenciais por definição; e, por fim, a necessidade de não divulgar inconsistências que persistem no sistema de remuneração para não fragilizar a imagem da empresa internamente. / This dissertation addresses the issue of transparency in compensation system communication to employees (TCSC), which has been, for a long time, a controversial issue in the companies, and is also considered one of the taboos of our society. The study developed a measurement instrument for TCSC, as well as analyzed how a group of companies in Brazil handles the communication of its compensation practices and identified factors that influence the decision of these companies as the greater or lesser transparency. A systematic review of literature on the subject was held to give theoretical consistency to the development of the measurement instrument. In the empirical step, in order to validate and refine the instrument, ten in-depth interviews were performed, five of them with experts on the subject of compensation and human resources management; and five with professionals responsible for the selected companies compensation department. Interviews with those responsible for the compensation department were also used for an exploratory research on how companies were managing TCSC and the main reasons that led to adopt different communication strategies with their employees. As a result, it is considered that this paperwork has generated a promising alternative to measure the possible variations existing in the compensation system practices communication. The instrument developed is limited to the fixed part of compensation that involves base salary, its increase and market analysis. As for the attitude of the companies researched about the compensation system communication, it was found that they are more transparent in the disclosure of general information about the compensation structure and its operating criteria. It is also noticed that organizations supply managers with information of their staff\'s compensation, but it is not common to provide information of other teams\' compensation. The companies\' level of transparency declines when it involves communicating to employees specific compensation structure information about the professional itself (for example, their salary range), or the position that represents the next step in employee\'s career and, especially, on the remuneration of other positions in the company. We must emphasize that none of the analyzed companies disclose for all staff the amounts of individual wages, this information is restricted only to direct manager of the team and HR staff. Finally, it was possible to identify the reasons that lead companies to be more transparent in the compensation communication: the encouragement of a participatory organizational culture; belief in the development of human capital, maintaining a positive organizational climate as it relates to the perceived fairness of the criteria adopted for the wages definition in the company; the need to align people to business goals; intent to make clear that the company is paying above-market wages. The factors that influence companies to maintain the secrecy of the compensation practices were: organizations maintenance of more paternalistic organizational culture in which it is believed that people is not able to understand all the complexity involved in the compensation system; the internal belief that wages are confidential by definition; and, finally, the necessity not to disclose inconsistencies that persist in the compensation system to not undermine the company\'s internal image
9

Wide-Area Time-Synchronized Closed-Loop Control of Power Systems And Decentralized Active Distribution Networks

Cintuglu, Mehmet Hazar 10 November 2016 (has links)
The rapidly expanding power system grid infrastructure and the need to reduce the occurrence of major blackouts and prevention or hardening of systems against cyber-attacks, have led to increased interest in the improved resilience of the electrical grid. Distributed and decentralized control have been widely applied to computer science research. However, for power system applications, the real-time application of decentralized and distributed control algorithms introduce several challenges. In this dissertation, new algorithms and methods for decentralized control, protection and energy management of Wide Area Monitoring, Protection and Control (WAMPAC) and the Active Distribution Network (ADN) are developed to improve the resiliency of the power system. To evaluate the findings of this dissertation, a laboratory-scale integrated Wide WAMPAC and ADN control platform was designed and implemented. The developed platform consists of phasor measurement units (PMU), intelligent electronic devices (IED) and programmable logic controllers (PLC). On top of the designed hardware control platform, a multi-agent cyber-physical interoperability viii framework was developed for real-time verification of the developed decentralized and distributed algorithms using local wireless and Internet-based cloud communication. A novel real-time multiagent system interoperability testbed was developed to enable utility independent private microgrids standardized interoperability framework and define behavioral models for expandability and plug-and-play operation. The state-of-theart power system multiagent framework is improved by providing specific attributes and a deliberative behavior modeling capability. The proposed multi-agent framework is validated in a laboratory based testbed involving developed intelligent electronic device prototypes and actual microgrid setups. Experimental results are demonstrated for both decentralized and distributed control approaches. A new adaptive real-time protection and remedial action scheme (RAS) method using agent-based distributed communication was developed for autonomous hybrid AC/DC microgrids to increase resiliency and continuous operability after fault conditions. Unlike the conventional consecutive time delay-based overcurrent protection schemes, the developed technique defines a selectivity mechanism considering the RAS of the microgrid after fault instant based on feeder characteristics and the location of the IEDs. The experimental results showed a significant improvement in terms of resiliency of microgrids through protection using agent-based distributed communication.
10

Návrh a implementace podnikového intranetového systému / Design and development of business intranet system

Štúň, Jaroslav January 2008 (has links)
The design and implementation of business intranet system for Hestego s.r.o. company in attempt to enhance the quality and efficiency of internal communication, business culture and awareness of empolyees is the main focus of this thesis. Current status, limited to use of narrow-profiled information system is described as a part of analysis. Furthermore, commonly used practices in implementing business intranet, together with broadly acknowledged advantages for companies are provided. Based on the gained knowledge, a solution relying on implementing an independent intranet system utilizing database system and .NET web application is proposed. Within the practical section, company’s requirements with regards to functionality and design, conforming with provided logo guidelines are presented. As a final part of this thesis, proposed solution is implemented, documented and deployed in corporate enviroment. Moreover, the advantages of proposed solution for the company are evaluated.

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