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The methods belonging to the artificial intelligence field are becoming very popular within the power system domain. Within the literature several applications are highlighted: load forecasting, power flow computing, power flow optimization, network expansion. Distribution network expansion planning is tackled. The power flow is computed using conventional methods, but the optimal power flow and distribution...
The paper is focusing on dynamic transmission network expansion planning (TNEP). The TNEP problem has been approached from the retrospective and prospective point of view. To achieve this goal, the authors are developing two software-tools in Matlab environment. Power flow computing is performed using conventional methods. Optimal power flow and network expansion are performed using artificial intelligence...
The authors are proposing a software-tool for transmission network expansion planning (TNEP). The developed software-tool is able to be used in case of complex, large scale power systems. It uses a.c. complete power flow mathematical model. Power flow computing is performed using conventional methods. Optimal power flow and network expansion are performed using artificial intelligence methods. Within...
The renewable sources' influence on the distribution network expansion planning is tackled. The optimal expansion solution and other alternatives (quasi-optimal) are analyzed and a final one is proposed. Network reconfiguration and N-1 contingencies are performed. The power flow is computed using conventional methods, but the optimal power flow and distribution network expansion are performed using...
The renewable sources' influence regarding the distribution network expansion planning is tackled. The network expansion is discussed in two cases: with and without renewable sources. The obtained expansion solutions are analyzed and a final one is proposed by the authors. To achieve this goal network reconfiguration and N−1 contingecies are performed. The goal is to supply all the consumers for each...
The renewable sources' influence regarding the distribution network expansion planning is tackled. The network expansion is discussed in two cases: with and without renewable sources. The obtained expansion solutions are analyzed and a final one is proposed by the authors. To achieve this goal network reconfiguration and N−1 contingecies are performed. The goal is to supply all the consumers for each...
This paper presents a software instrument designed for calculating of probabilistic power flow. There are discussed the results obtained by applying the instrument to study system test with a large scale power system, which includes west, southwest and northwest parts of Romanian Power System.
Wind capacity is undergoing the fastest rate of growth of any form of electricity generation. The variability of these sources is the main aspect which affects the system security and operation. Considering all these, new tools of analysis are necessary. This paper presents the analysis of large wind farm integration in nowadays power system using stochastic power flow approach and random contingency...
Large scale integration of renewable energy sources is challenging the stability of the power systems. The variability of these sources (especially of wind farms) is the main aspect which affects the system security and operation. Considering the unpredictability of these sources, the variations of the loads and the new paths of supply new tools of analysis are necessary. In this paper a new application...
Power quality is the set of regulations of electrical properties that allows electrical systems to function without significant loss of performance or aging. The term is used to describe electric power that drives an electrical load and the load's ability to operate properly with that electric power. Without the proper power, an electrical device (or load) may malfunction, fail prematurely or not...
The amount of renewable energy sources constantly increased during recent years requiring detailed analysis about their impact on system security and operation. Because of the variability of these sources, which is the main aspect that affects the operating conditions of the power system, new tools of analysis are necessary. This paper presents the analysis of large wind farm integration in nowadays...
Taking into account the directives of the European Union concerning the increasing role of renewable power sources for supplying loads and reduction of CO2 emission, this paper presents details of the technical and economic characteristics for a hybrid solution generation power system. The goal of this micro power system is to supply residential electrical load that consist in 60 consumers of 5 kW...
Power quality is the study of the sources, effects and control of disturbances which propagate via the electric power supply. The disturbances change the supply RMS voltage or its waveform (or very occasionally the frequency) and may originate from various sources. Within the paper, the authors are focusing on power quality monitoring. The presented approach refers to substation ancillary services...
ZnO based varistors are today frequently used for making state of the art surge arresters for all voltage levels, due to some advantages like a high non-linearity coefficient and a high energy absorption capacity. Due to their thermal activated conduction, the heat dissipation inside that semiconductor device is crucial for its service. Heat dissipation study could be done only by modelling the thermal...
Within the paper, the authors deal with electric substation ancillary services power consumption analysis. They are focusing on load curve numerical processing. A real case study is discussed, Timisoara 400/220/110 kV substation, the consumers being supplied from the autotransformer tertiary winding. The parameters specific to ancillary services load curves are computed using a software tool developed...
Ancillary services are support services within the power system, those which are necessary to support the transmission capacity and are essential in maintaining power quality, reliability and security of the grid. Considering these facts the supply method of the ancillary services is a key feature for the appropriate operation of the power system. Within this paper the authors are focusing on electric...
Ancillary services are support services within the power system, those which are necessary to support the transmission capacity and are essential in maintaining power quality, reliability and security of the grid. Considering these facts the supply method of the ancillary services is a key feature for the appropriate operation of the power system. Within this paper the authors are focusing on ancillary...
Ancillary services are support services within the power system, those which are necessary to support the transmission capacity and are essential in maintaining power quality, reliability and security of the grid. Considering these facts the supply method of the ancillary services is a key feature for the appropriate operation of the power system. Within this paper the authors are focusing on ancillary...
One of the key problems of energy transmission system within an independent environment refers to the necessity to establish a cost for system services on nondiscriminatory bases. A properly established cost provides economical signals for short-term and long-term recovery current expenses and for a fair cost allocation for participants. This paper aims to analyze the costs that are associated with...
Growing uncertainty in power systems coupled with the introduction of power markets calls for the development of new tools for planning, operations and market-based decision-making. The Available Transfer Capacity (ATC) evaluation represents the fundamental security operational standard of the transmission network, in case of the new operating conditions of the power systems. Fast and accurate evaluation...
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