The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
This paper presents the study of a vacuum interrupter (VI) of 12kV, in terms of optimization of the electrical field in order to obtain a more uniform distribution inside the VI chamber. The proposed method consists in combining the construction and simulation programs in a Solid Works module, respectively ComsolMultiphisics, with the optimization module that includes the programming environment Matlab...
Unified power quality conditioner (UPQC) consists of combined shunt and series active power filters for improving both the power quality on the source side and on the load side. The paper presents a simple method for controlling the series filter under unbalanced and distorted load conditions by using a three phase locked loop (PLL). Two methods for controlling the shunt filter are analyzed. The model...
This paper deals with implementing an internal model control strategy for Maximum Power Point Tracking (MPPT) of a stand alone solar Photo Voltaic (PV) system in order to enhance its efficiency. For the modeling process, 80W standalone solar PV system was considered. In order to improve the performance, the control strategy follows the maximum power point output.
This paper refers to the magnetic actuator from vacuum circuit breaker. The actuator is one of the main component with functions for switching, latching and release. Due to the low quality of power supply of actuator, undesirable effects such as the delay during the operation of connecting or disconnecting the circuit breaker can result. As case of study to observe this delay was used a monopolar...
Due to ongoing push of technology to smaller dimensions and higher computational speed of the electronic devices, a higher heat generation on device is obtained, increasing the thermal management challenges. This paper proposes a study of the electro-thermal behavior in electronic power devices and the optimization of the cooling system in order to increase the lifetime of the device. Different heat-sink...
Even though the concept of Demand Response (DR) is not really widespread across Romania yet, the Technical University of Cluj-Napoca (TUCN) is currently implementing a pilot project in its own buildings within the Horizon 2020 Project named DR-BoB (project no. 696114/2016). The main purpose of this pilot project is to develop an energy monitoring and targeting system, along with a DR program in load...
A new formula for the hysteresis losses prediction at higher magnetic fields is proposed. Its efficiency is tested both for sinusoidal and non-sinusoidal waveforms, applied for non-oriented magnetic FeSi sheets of various sorts, which are used for electrical machine cores. The model parameters are identified starting for laboratory measurements made by a standardized single sheet tester (SST). The...
The paper is focused on the simulation, realization and testing of a low current RC passive filters. The analysis relies on low pass and high pass first order passive filters. Staring from these filters other two RC circuits can be achieved: band pass and band stop filters. Based on the results yielded by the design and respectively by simulation, an integrated experimental platform was realized....
The paper presents the results of a new statistical based data mining approach that explores the load curves in order to detect abnormal data, the so-called outliers. The load curves characterized by their main indicators are provided from Smart Meters mounted on the power substation. The proposed method was tested using a real database with 290 substations from rural area. By outlier's elimination,...
The paper presents the energy exchange mediated by a prosumer, highlighting the measurement context for the active power and energy. It is a case study on the combined measurement uncertainty calculated for typical power system measurement chain deployed for hourly power dispatch on the Romanian Energy Market.
Wireless Sensor Networks are used widely for remote environmental monitoring, target tracking or for recording weather conditions change applied at diverse applications. They have become integral part of our lives, by giving reliable data gathering and even that the sensor node is small, lightweight and portable. As the power for each sensor node is supplied from a battery, the lifetime and residual...
This paper aims to presents an overview of electrical contact resistance. The electrical contacts are important elements which can be found on all of the electrical installations from the power source to the consumer. The presence of an electrical contact on a current path always introduces an additional electrical resistance, named contact resistance. After an overview of the role of the contacts...
The purpose of this paper is to present the modeling results consists in the computation of the electric potential in 3D applications involving moving interfaces using mesh free methods. The eXtended Finite Element Method (XFEM) is used to numerically approximate the electric field problem while the Signed Distance (SD) function is used to determine the position of the moving interface inside the...
The controlled switch became a technical solution for reducing the switching stress. The controlled switching can be applied to any type of commutations. There are now dedicated controllers which are used more often for the switching of the transport and distribution lines, of the small inductive loads, of the capacitors batteries, or for energizing the no load power transformers. The paper deals...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.