Cascaded Multilevel Inverter-Based Asymmetric Static Synchronous Compensator of Reactive Power

The topology of the static synchronous compensator of reactive power for a low-voltage three-phase utility grid capable of asymmetric reactive power compensation in grid phases has been proposed and analysed. It is implemented using separate, independent cascaded H-bridge multilevel inverters for each phase. Every inverter includes two H-bridge cascades. The first cascade operating at grid frequency is implemented using thyristors, and the second one—operating at high frequency is based on the high-speed MOSFET transistors. The investigation shows that the proposed compensator is able to compensate the reactive power in a low-voltage three-phase grid when phases are loaded by highly asymmetrical reactive loads and provides up to three times lower power losses in the compensator as compared with the situation when the compensator is based on the conventional three-level inverters implemented using IGBT transistors.publishedVersio

Marxism Lost and Found: Alasdair MacIntyre and the Contemporary Debate

This paper examines the changing nature of debates that focus on the philosophy of Alasdair MacIntyre. Whilst outlining the history of MacIntyre’s engagement with Marxism and some of his key ideas, it argues that it is only recently that such debates have begun to rightfully recognise the continued relevance of Marxism to such discussions. I note that crucial aspects of MacIntyre’s politics and philosophy, particularly his opposition to capitalism, are now integral to the contemporary debate which helps in generating a shared vision of radical politics. Nevertheless, I point out that key disagreements still remain as to the role of Marxism within such debates, the validity of MacIntyre’s critique of Marxism, as well as the potentially problematic post-Marxist practice that MacIntyre advocates in After Virtue and beyond

Asistuojamajai rekreacijai taikytinos intelektualios mobilios mokomosios eko-socialinės laboratorijos kūrimo būdai

An approach of development of an Intelligent Mobile Tutoring Eco-Social Laboratory for Assisted Recreation is proposed based on description of: principles of designing of sustainable power supply and selecting of professional bio-feedback hardware/software for mobile laboratory, methods of creating of an ambient intelligent architecture of the Laboratory as well as of algorithms for assisted recreation to be applied, and methods to be applied for dissemination of how the Laboratory could be used as recreational tool for a typical European household/family. The Laboratory can be treated as an intelligent object containing areas for varied activities such as sleeping, working, entertaining as well as of planning, monitoring and analyzing of personal biofeedback information during the recreation activities in it. An intelligent environment of the Laboratory may be implemented in the UltraLite–type “fifth wheel” trailer which comes with all the necessities for luxury leisure time of the group of up to 6 persons. To assemble of such mobile laboratory by prices of 2009/01/15 might cost of approximate 37,806.00 Euro. This type of laboratory may help to automatically collect of an experience and knowledge in the process of development of preconditions towards of sustainable recreation of the elderly and/or people with movement disabilities based on their assisted activities in the mobile smart flat and an environment around

Asistuojamajai rekreacijai taikytinos intelektualios mobilios mokomosios eko-socialinės laboratorijos kūrimo būdai

An approach of development of an Intelligent Mobile Tutoring Eco-Social Laboratory for Assisted Recreation is proposed based on description of: principles of designing of sustainable power supply and selecting of professional bio-feedback hardware/software for mobile laboratory, methods of creating of an ambient intelligent architecture of the Laboratory as well as of algorithms for assisted recreation to be applied, and methods to be applied for dissemination of how the Laboratory could be used as recreational tool for a typical European household/family. The Laboratory can be treated as an intelligent object containing areas for varied activities such as sleeping, working, entertaining as well as of planning, monitoring and analyzing of personal biofeedback information during the recreation activities in it. An intelligent environment of the Laboratory may be implemented in the UltraLite–type “fifth wheel” trailer which comes with all the necessities for luxury leisure time of the group of up to 6 persons. To assemble of such mobile laboratory by prices of 2009/01/15 might cost of approximate 37,806.00 Euro. This type of laboratory may help to automatically collect of an experience and knowledge in the process of development of preconditions towards of sustainable recreation of the elderly and/or people with movement disabilities based on their assisted activities in the mobile smart flat and an environment around

Modeling of Human Physiological Parameters in an E-Laboratory by SOM Neural Networks

Ambient Intelligence (AmI) refers to the presence of a digital environment that is sensitive, adaptive, and responsive to the presence of people. AmI concepts can help in creating the intelligent e-advisors such that are able t

Daugelio agentų e. socialinės rūpybos paslaugų sistema išmaniojo ekologiško socialinio būsto gyventojams

The paper presents further development steps of recently proposed model of an adaptive multi-agent-based e-social care system by introducing in it an intelligent power controller to supporting people in a Smart Ecological and Social Apartment, the SESA. The schematic diagrams of the controller are proposed for adaptive control of motors and LED lights as well as for measurements of EDA, HR, and FT signals of inhabitancies in the SESA. The proposed in this paper multi-agent system consists of two groups of agents, first, the agents for human’s physiological data collection, analysis and emotional state detection, and, second, the agents for an intelligent power control which takes environmental and hardware parameters and, with the use of embedded agents, provides adaptive control of LED lights, temperature as well as of power consuming by motors used in the SESA in accordance with the human state defined by the first group of agents

Cascaded Multilevel Inverter-Based Asymmetric Static Synchronous Compensator of Reactive Power

The topology of the static synchronous compensator of reactive power for a low-voltage three-phase utility grid capable of asymmetric reactive power compensation in grid phases has been proposed and analysed. It is implemented using separate, independent cascaded H-bridge multilevel inverters for each phase. Every inverter includes two H-bridge cascades. The first cascade operating at grid frequency is implemented using thyristors, and the second one—operating at high frequency is based on the high-speed MOSFET transistors. The investigation shows that the proposed compensator is able to compensate the reactive power in a low-voltage three-phase grid when phases are loaded by highly asymmetrical reactive loads and provides up to three times lower power losses in the compensator as compared with the situation when the compensator is based on the conventional three-level inverters implemented using IGBT transistors