Efficient monitoring of Power Quality in main node of energy system containing different motor lo... more Efficient monitoring of Power Quality in main node of energy system containing different motor load and supplied from autonomous power plant is examined. By mean of long term monitoring of all power quality parameters it is established their conformity to international standard. Estimation of power quality parameters at Sangachal sub-station node which GRID supply BP terminal at.
The paper devoted to the developing of DG system on the base of hybrid AC/DC network. The attenti... more The paper devoted to the developing of DG system on the base of hybrid AC/DC network. The attention paid to microgrids with hybrid power sources (wind, PV-solar, fuel cell, bio gas and so on) with ability to deliver electrical energy on twin power buses for further supplying of customers with AC and DC power. As an example micro grid with dc and ac power sources supplying parking area was investigated.
The temperature of oil and paper is crucial in power transformers. In the case of high temperatur... more The temperature of oil and paper is crucial in power transformers. In the case of high temperature, the insulation can carbonise and produce gasses, reducing the lifetime of the transformer drastically. One method of effective cooling of windings is to introduce barriers so that the oil flows between discs and not around them as it would do otherwise. This method is well known but an analytical approach would be in place in order to estimate the accurate result of placement of such barriers. In this paper, the Finite Element program COMSOL is used to make such calculations and decide the optimal placement of barriers in a winding. It has been shown that even few barriers reduce the oil and paper temperature significantly. A method to make such calculations is introduced.
ABSTRACT This paper addresses challenges part of the shift of paradigm taking place in the way we... more ABSTRACT This paper addresses challenges part of the shift of paradigm taking place in the way we produce, transmit and use power related to what is known as smart grids. The aim of this paper is to explore present initiatives to establish smart grids as a sustainable and reliable power supply system. We argue that smart grids are not isolated to abstract conceptual models alone. We suggest that establishing sustainable and reliable smart grids depend on series of contributions including modeling and simulation projects, technological infrastructure pilots, systemic methods and training, and not least how these and other elements must interact to add reality to the conceptual models. We present and discuss three initiatives that illuminate smart grids from three very different positions. First, the new power grid simulator project in the electrical engineering PhD program at Queensland University of Technology (QUT). Second, the new smart grids infrastructure pilot run by the Norwegian Centers of Expertise Smart Energy Markets (NCE SMART). And third, the new systemic Master program on next generation energy technology at østfold University College (Hiø). These initiatives represent future threads in a mesh embedding smart grids in models, technology, infrastructure, education, skills and people.
Efficient monitoring of Power Quality in main node of energy system containing different motor lo... more Efficient monitoring of Power Quality in main node of energy system containing different motor load and supplied from autonomous power plant is examined. By mean of long term monitoring of all power quality parameters it is established their conformity to international standard. Estimation of power quality parameters at Sangachal sub-station node which GRID supply BP terminal at.
The paper devoted to the developing of DG system on the base of hybrid AC/DC network. The attenti... more The paper devoted to the developing of DG system on the base of hybrid AC/DC network. The attention paid to microgrids with hybrid power sources (wind, PV-solar, fuel cell, bio gas and so on) with ability to deliver electrical energy on twin power buses for further supplying of customers with AC and DC power. As an example micro grid with dc and ac power sources supplying parking area was investigated.
The temperature of oil and paper is crucial in power transformers. In the case of high temperatur... more The temperature of oil and paper is crucial in power transformers. In the case of high temperature, the insulation can carbonise and produce gasses, reducing the lifetime of the transformer drastically. One method of effective cooling of windings is to introduce barriers so that the oil flows between discs and not around them as it would do otherwise. This method is well known but an analytical approach would be in place in order to estimate the accurate result of placement of such barriers. In this paper, the Finite Element program COMSOL is used to make such calculations and decide the optimal placement of barriers in a winding. It has been shown that even few barriers reduce the oil and paper temperature significantly. A method to make such calculations is introduced.
ABSTRACT This paper addresses challenges part of the shift of paradigm taking place in the way we... more ABSTRACT This paper addresses challenges part of the shift of paradigm taking place in the way we produce, transmit and use power related to what is known as smart grids. The aim of this paper is to explore present initiatives to establish smart grids as a sustainable and reliable power supply system. We argue that smart grids are not isolated to abstract conceptual models alone. We suggest that establishing sustainable and reliable smart grids depend on series of contributions including modeling and simulation projects, technological infrastructure pilots, systemic methods and training, and not least how these and other elements must interact to add reality to the conceptual models. We present and discuss three initiatives that illuminate smart grids from three very different positions. First, the new power grid simulator project in the electrical engineering PhD program at Queensland University of Technology (QUT). Second, the new smart grids infrastructure pilot run by the Norwegian Centers of Expertise Smart Energy Markets (NCE SMART). And third, the new systemic Master program on next generation energy technology at østfold University College (Hiø). These initiatives represent future threads in a mesh embedding smart grids in models, technology, infrastructure, education, skills and people.
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