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The correct functioning of data measuring systems is impossible without timely metrological examination and calibration of measuring channels. Uncalibrated channels can transmit unreliable data, leading to the poor monitoring and incorrect decision making. The overview of the current research in the field of measuring channels calibration shows the low research activity in this area and highlights...
Generally speaking, basic real-time measurements collected from different control centers have a time delay due to the transmission delay and data exchanges in the energy management system (EMS). Measurement errors resulting from both the raw measurement noise and time delay have undesirable effect on power system dynamic state estimation (DSE). In order to reduce measurement errors, accurate measurement...
To improve the interruption performance of electric switching apparatus, it is important to understand the dissipative process of injected energy between the electrodes. In this paper, the time-resolved energy balance of air arcs is investigated under various currents and gap distances. The total energy injected to the arc is divided into two parts: energy transferred to electrodes which mostly causes...
Industrial power consumption cost-benefit analysis requires reliable data on the electric power amounts distributed between manufacturing departments and process units. Furthermore, reliable power consumption data provide the base for fiscal cost clearing at electric power markets. These data are supplied by the electric power measuring systems (counters) the failure of which results in the gross...
Microgrids (MGs) represent surely the most challenging topic in electrical engineering, promising the decreasing of carbonization, the totally integration of different renewable sources and a cheap solution for those rural areas where electric distribution is economically unsustainable. The most important feature of a MG is represented by the possibility to work in islanded configuration in order...
With the rapid development of the wide bandgap (WBG) power transistor technology, the latest Silicon-Carbide and Gallium-Nitride (SiC and GaN) based power transistors can be used as the main switches in the medium power (≥10 kW) conversion systems. Electrical signal based efficiency measurement could be very challenging due to the high-frequency output signals and the high power to loss ratio. In...
In a power distribution network, network topology information is essential for an efficient operation of the network. This information is not accurately available, due to uninformed changes that happen from time to time, or uncertain meter readings. Reliable prediction of system status is a highly demanded functionality of smart energy systems, which can enable users or human operators to react quickly...
The electrical power transfer is an essential element of an energy system. Along with frequency and phase, electrical power influences the dimensions and costs involved. The paper presents an analysis of mark-space method, which offers a mathematical solving of power measurement in singlephase AC circuits. Remarkable that it can has analog solution implemented. The existence of electronic circuits...
Software Defined Networks (SDN) and Network Function Virtualization (NFV) put requirements on the Energy Systems to deliver not only power but also to provide performance data with high resolution and granularity. Intelligent Load Management (ILM) needs data on consumed power available to be able to decide on optimal way to utilize available power in the Information and Communication Technology (ICT)...
This paper investigates significant changes in the performance of switch-mode power supplies used in standard desktop PCs (PC-SMPS'), which might occur when a PC-SMPS transfers from high to low operating powers. Using the experimental results, it is shown that due to a partial discharging of dc link capacitor at low powers, the input ac current of tested PC-SMPS' loses its periodicity with supply...
A good management of consumption by reactive power control reveals economical aspects. The current European scheme is intended to encourage consumers to minimize reactive power consumption. Energy providers usually request additional costs for business customers who have a power factor lower than a certain limit. Engineers have a lot of interest in the power factor of a load as one of the factors...
This paper presents a new gate driver concept that consists of an integrated measurement of the junction temperature and the load current of a power module during inverter operation. For junction temperature measurement the gate driver identifies the temperature sensitive on-chip internal gate resistor by means of a small identification signal that is modulated onto the positive gate voltage. To determine...
The work deals with researching robustness of information system for measuring of microcontrollers average power consumption. Defined the ways of ensuring robustness of the proposed method. Considered hardware for robustness of the proposed method and proposed methods of study of the robustness of the proposed method.
This paper presents the IEEE 1459-2010 based approach to assess the power quality in the medium voltage network. Active, reactive and apparent power components, based on the characteristic harmonic current and voltage are assessed in details. The properties of non-fundamental components and power flow are discussed. The unbalanced and non-sinusoidal three-phase power components are calculated on the...
Energy profiling in embedded systems is widely used in order to create a product that will run more with less charging periods. New technologies have been developed for both processing and communication modules of such systems that can be used in sensors networks and wearable applications. In this paper two different architectures that use Bluetooth Low Energy (BLE) as communication protocol are analyzed...
The static power consumption in modern integrated circuits has become a critical standpoint in side-channel analysis. As it has been widely demonstrated in the technical literature, it is possible to extract secret information from a cryptographic circuit by means of static current measurements. Static and dynamic power analysis require different measurement procedures, due to physical reasons. In...
Reliable operation of smart power grids depends on situational awareness made possible by real time system monitoring and accurate system condition estimation. Unfortunately, the tools used for real time system monitoring, which include supervisory control and data acquisition (SCADA) systems and phasor measurement units (PMU), are vulnerable to cyber-attacks due to the necessity of network connectivity...
In this paper a concept of hybrid Bluetooth Low Energy (BLE) Ultra-wideband (UWB) positioning system is presented. The system is intended to be energy efficient. Low energy BLE unit is used as a primary source of measurement data and for most of the time localization is calculated based on received signal strength (RSS). UWB technology is used less often. Time difference of arrival (TDOA) values measured...
The role of phasor measurement unit (PMU) in realizing the smart grid is very important due to its capability in providing synchronized measurement of real-time phasors of voltage and currents at the buses it is installed. Therefore, a proper and stable operation of the power system can be achieved. This paper extends the earlier work that use the binary particle swarm optimization method to solve...
This article presents a kit to collect data of electric loads using a device that measures single-phase data and and second device that measures the input of three-phase main power supply of a house. To collect the data, we used current sensors based on an open magnetic core to measure the electromagnetic field induced by the current in the electric conducting wire in a non intrusive way. In particular,...
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