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We formulate two simple benchmark problems for event-based control, where the optimal solutions in the continuous-time setting turn out to be ordinary PI and PID controllers. The benchmarks can be used to compare the performance of continuous-time, discrete-time, and various event-based controllers with regard to for instance disturbance attenuation, control effort, and average sampling or actuation...
The Museum of the Person (Museu da Pessoa, MP) is a virtual museum aimed at exhibiting life stories of common people. Its assets are composed of several interviews involving people whose stories we want to perpetuate. So the museum holds an heterogeneous collection of XML (eXtensible Markup Language) documents that constitute the working repository. The main idea is to extract automatically the information...
Unintentional islanding is a well known problem for distributed generation units. Due to several hazards, grid-codes regarding anti-islanding-detection have been introduced and adapted in the near past. Those standards have been implemented with respect to parallel RLC load behaviour, which is assumed to represent worst-case conditions. But today, more and more loads do not show a linear behaviour...
For image generation, deep neural networks are trained to extract high-level features on natural images and to reconstruct the images from the features. However it is difficult to learn to generate images containing enormous contents. To overcome this difficulty, a network with an attention mechanism has been proposed. It is trained to attend to parts of the image and to generate images step by step...
The article describes the problem of operation and control of the electronic generators as a part of multi apparatus systems of high-power ultrasonic action. It is shown the possibility of modernization of the standard constructional circuit of the electronic generator, it is analyzed the possibilities of the electronic generator developed for the ultrasonic apparatus of “Bulava-P” series. The methodology...
Power system stabilizers for the generation of control signals for exciting system have been employed to damp oscillations resulting from the power system disturbance input. To overcome the shortcomings of the power system conventional stabilizers by the use of feedback linearization methods and H∞ robust optimal control, two synchronous generator exciting system controllers were designed. The main...
Advanced Television Systems Committee (ATSC) 3.0 physical layer standard has adopts frequency interleaving scheme to mitigate burst errors caused by frequency selective fading in OFDM systems. In this paper, we briefly present the frequency interleaver of ATSC 3.0 and evaluate the performance on various wireless fading channel conditions.
The ESD test method according to ECSS-E-ST-20-07C [1] has shown weaknesses in reproducibility and reliability. We have previously shown that test results can vary from one test laboratory and setup to another, [2] this entails developing an improved methodology and hardware to address the ECSS test shortcomings. In this paper, a new topology and a generator built using a pressurized high voltage relay,...
The paper is focused on analysis and comparison of breaking capability of conventional distributional circuit breakers and generator circuit breakers within special cases of breaking. The loss of breaking capability in limitary areas of breaking characteristics might lead to the circuit breaker's failure during clearances of asymmetrical currents with large DC component. The first part of the paper...
In this work, basic principles of an alternative test procedure exploiting crosstalk to reproduce in the terminal loads of a wiring structure the same disturbances that would be induced by traditional radiated susceptibility (RS) tests are presented. Equivalence with radiation is achieved by the use of a generator circuit properly fed with two synchronized RF generators, and holds for whatever loads...
This paper describes the impact of the operation of distributed energy sources on voltage quality parameters in medium voltage distribution grids. The survey is based on the evaluation of voltage quality measurements which were made in different medium voltage distribution grids with connected wind power plants. These measurements were made in 2014 and were evaluated according to the EN 50160 standard...
Apart from ESD tests at system level, e.g. according to IEC 61000-4-2, the investigation of the EMC related immunity of individual ICs against transient disturbances is becoming increasingly important: an ESD sensitive IC could cause problems in subsequent system level tests when in use. Knowing in advance what to expect from an IC can help save time and money in the design process. Using standard...
With an increasing amount of installed dispersion resources, the requirements for connecting generators must be focus on stability, control and ensuring safe operation of the distribution system and generators must provide auxiliary services for network. In the European Network Code NC ENTSO-E RFG the requirements for advanced functions of generators are defined and are accepted into the czech technical...
Regardless of the size of a generating entity, achieving compliance with NERC PRC-025-1 requires a concerted effort. GOs or GOPs will need to rely heavily on either their internal or external engineering resources, especially when moving beyond the conservative calculations used in Option A to the more accurate software simulations. While these simulations take more time to execute, they ultimately...
The growing complexity of current embedded systems increases not only the time-to-prototype and time-to-market, but it also requires a major effort around repetitive engineering tasks in order to maximize the efficiency and minimize the money investment. A lot of research has been done on this field, leading system development, test automation and system reutilization to huge relevance and considerable...
In this paper, we study the algebraic structure of Z2 [u]Z2 [u, v]-additive codes which are Z2 [u, v]-submodules where u2 = v2 = 0 and uv = vu. In particular, we determine a Gray map from Z2[u]Z2[u, v] to Z22α+8β and study generator and parity check matrices for these codes. Further we study the structure of Z2[u]Z2[u, v]-additive cyclic codes.
Micro-grids allow rural and remote communitiesthat are either not connected to the national power grid, or sufferfrom load shedding, to operate power networks autonomously. Like conventional power networks, micro-grids require management and billing mechanisms. Tamper-resistant meters are noteconomically viable so we use a resource-constrained networkformed of devices with limited memory, processing...
Recent developments in secure computation have led to significant improvementsin efficiency and functionality. These efforts created compilers that form thebackbone of practical secure computation research. Unfortunately, many of theartifacts that are being used to demonstrate new research for secure computationare incomplete, incorrect, or unstable, leading to demonstrably erroneousresults and inefficiencies...
This paper studies the 2013 10-year plan of the Western Electricity Coordinating Council (WECC), and its ability of meeting the emission rate standards for existing power plants proposed by the US Environmental Protecting Agency (EPA) in June 2014. The study represents a 10-year generation planning study. A reduced 240-bus WECC system is used as a test model, and is built on MATPOWER Software. Future...
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