Temat: hybrid supply - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Compensation of reactive power and hybrid operation in the systems of uninterruptible power supply (UPS)
Autorzy:: Bednarek, K.
Powiązania:: https://bibliotekanauki.pl/articles/97433.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: systems of uninterruptible power supply
reactive power compensation
hybrid operation
Opis:: The paper presents analysis of possible compensation of reactive power by internal in¬put blocks of Uninterruptible Power Systems (UPS), without the use of additional power electronic converters or stationary passive elements (on the example of UPS EVER POWERLINE GREEN 33). Moreover, the consideration related to additional UPS functionality consisting in hybrid operation, enabling longer duration of supply maintenance within a definite region of the mains voltage variations. The results of measurements and calculations are presented, that have been carried out in a given physical system. Final part of the paper includes a summary of the obtained results.
Źródło:: Computer Applications in Electrical Engineering; 2013, 11; 209-221
1508-4248
Pojawia się w:: Computer Applications in Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Researches on power transmission systems of traction vehicles with a hybrid drive
Autorzy:: Kozłowski, M.
Plich, M.
Powiązania:: https://bibliotekanauki.pl/articles/244193.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
hybrid drive vehicles
unconventional power supply sources
electric machines
energy accumulators -super capacitors
Opis:: The structures of modern traction vehicles are based on new generation devices. Technical progress within the field of power transmission concerns such elements as sources of power supply, electric devices and energy electronic solutions in power transmission systems. The prototypes of traction vehicles being currently drawn up are hybrid vehicles using different kinds of sources of power supply ofpower transmission systems, the most important of which are combustion engines, contact systems, supercapacitors (ultracapacitors), accumulators and fuel cells. Main engines are usually electric machines. In energy electronic starting systems it is permissible to use all kinds of main electric engines, for example, direct-current motors (inline engines, commutator motors with permanent magnets or non-commutator motors) or three-phase motors of alternating current (induction and synchronous). This means a complete change of rules in energy managing in a vehicle. Sources of energy can have the function of basic power supply (contact system, combustion engine or combustion cell) or the function of power supply support (supercapacitors, accumulators or fuel cell). New functions of drive operation will be available, namely, leveling of basic power supply load, recuperation of braking energy of the whole train set, driving at the temporary disconnection of basic power supply (short-term application of accumulator as basic power supply). Each of the above functions can contribute to the improvement of watt-hour efficiency of the system or to prolonging the range of driving. Therefore, it is necessary to undertake research on new generation power transmission systems. Research tasks focus on measurement of state variables of a drive, analyses of traction signals, modeling of drive operation in the conditions of driving cycle realization, verification of a model, drawing up a strategy of energy management in order to achieve the best watt-hour efficiency and the range of driving. In the article presented, sample results of researches on applications of hybrid power transmission systems conducted in various national research centers will be demonstrated. They concern both theoretical research (model simulation) and prototype research. The conception will be presented of a laboratory station for conducting research on modern sources of power supply and drives, which is currently being built at the Faculty of Transport of Warsaw Polytechnic at the Division of Exploitation of Tracking Systems and Electric Equipment in Transport.
Źródło:: Journal of KONES; 2008, 15, 2; 233-238
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Ensuring Process Continuity of Multifaceted and Hybrid Supply Chains in Maritime Area
Autorzy:: Pleszko, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/504443.pdf
Data publikacji:: 2012
Wydawca:: Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:: business continuity
risk
incident
management system
supply chain
management strategies
process approach
hybrid structures
sea ports
Opis:: The supply chain formula based on strict close interdependence between all its elements causes the smallest disturbance in one of the links to menace the whole supply chain, which is why it is so important for the participants to identify the weakest links of the supply chain and indicating, through complex analysis, potential situations threatening the realization of the whole process; this is possible by respecting unified criteria of proceeding both on domestic and regional level, and on global scale. Safety management in the supply chain is a process aimed at determining areas menacing its proper functioning. An element of this process is undertaking suitable activities, using proper means to eliminate risk or minimise the consequences of its occurrence. Along with economic development increased risk can be observed, as well as qualitative changes in the character of appearing threats transposed from previous well recognizable, mainly fate kind of risks, to categories pertaining to the conditions of activities and process realization. What is important, in the case of hybrid supply network, the threat bound with conduct of activity exceeds the framework of a single enterprise. As a consequence, the appearance of risk in any link or stage of process realization significantly affects the whole supply chain. The article presents guidelines aimed at ensuring the continuity of the functioning of certain processes, the assumed level by providing the resources and commitment of top management, the critical parameters identified and proposed solutions dealing with crisis situation. It was noted that an appropriate response to this situation depends not only on the availability of information about the incident, but also awareness and competence of employees. Modern hybrid form characterized by high complexity of the organizational, structural and task require all participants in the supply chain of involvement in the process and creating a positive image. Effective management of multi-level logistic network can not be confined only to the traditional and well-knows methods but requires uncommon merger holistic solution.
Źródło:: Logistics and Transport; 2012, 14, 1; 45-52
1734-2015
Pojawia się w:: Logistics and Transport
Dostawca treści:: Biblioteka Nauki

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