Distributed generation by renewable energy sources, is a new phenomenon in recent years and it brings several challenges for electric power system operations.Given that, distributed generators shall be strictly compliance with relevant standards technical requirements, to preserve current level of quality reliability supply.Therefore, this research aimed at verification non-synchronous generating modules, any requirements.At the beginning, provides comprehensive review on issue including...

The paper is focused on power flow control in energy systems with grid-on renewable sources employing time-proportional controlled and phase angle resistive loads (like boilers) to balance produced by the sources. system operational properties are described major mechanisms affecting voltage quality identified. Contributions of pulse-width regulated flicker, harmonics high frequency conducted disturbances audio range (2-250 kHz) studied a test realized small laboratory measure. Finally,...

Fundamental changes concerning the development of photovoltaic (PV) installations in Czech Republic (CR) have occurred after 2010. The limits (and subsequent termination) support for newly installed PV power plants (cancellation purchase prices produced electricity) were most important. This change approach was advised by relevant state authorities before end year 2010 and resulted a massive increase during goal investors to get more favorable conditions electricity produced. A considerable...

The criminal prohibition of psychoactive substances is challenged every day as new designer emerge on globalized markets in a regulatory void. In case study recent amendment the Czech Republic, article reconstructs formulation recommendations by an advisory committee working at boundary between science and practical policy making. A uniform legal status was applied to both high-risk low-risk substances. demonstrates how expert efforts produce evidence-based advice were constrained externally...

Current efforts to open up the practical education broad group of interested students, leads still greater development so called virtual laboratories. E-learning is becoming an important part teaching at universities. The paper describes one developed laboratory exercises, which was created with intention remote access. It a photovoltaic system accumulation power, where students can simulate various operating conditions. idea creates tasks have established according actual situation in...

The paper presents the concept of a hybrid power system with additional energy storage to support electric vehicles (EVs) charging stations. aim is verify possibilities mutual cooperation individual elements from point view balances and show utilization accumulation for these purposes using mathematical modeling. description technical solution described by model in Matlab Simulink programming environment. Individual assembled are detail, together algorithm control logic supporting system....

Rapid and frequent changes in energy flow direction, those may occur active distribution systems due to presence of (un)intentional generation with simultaneous consumption, have significant effect on correctness consequent interpretation measured power registered by analyzers revenue meters based standard metric long measuring window. The loss information because averaging window is explained investigated using a numerical model considering four invariant parameters. Moreover, identified...

The urgent need for the development of charging stations hybrid cars and electric vehicles (EV) still shows as important in context current gradual this type transport. paper contains an energy analysis concept with integrated accumulators renewable sources. Based on are developed mathematical models. It was performed energy-economic order to verify possibility using way reduce load network at connection point.

The paper deals with innovative concept of power generating module field testing, focus on PV inverters belonging to category A, using a virtual testing process as complementary method compliance verification employing system simulator. starts brief review currently used methods and state art pointing approach for the implementation. In next, experimental set-up National Instrument hardware based control custom loop in LabView software is introduced obtained test results are evaluated assess...

This paper presents a model of three-blade wind turbine, which is used to compare the outputs from with real measured data. Functional important simulate multiple different states and its behavior in hybrid energy systems can be predict power generated within these systems.

Operating characteristics of the inverters have great potential to affect operation electric power system in terms stability, efficiency, quality as well reliability supply. Grid support form autonomous regulation functions is increasingly required many countries, even from small sources. The requirements arising national legislation vary, which raises concerns among distribution operators about correct implementation and setting regulatory by inverter manufacturers. Based on authors'...

This paper focuses on discussion of in-field compliance testing power generating modules (PGMs) within Czechia. Firstly, it describes methods that can be used either in laboratory setting or a PGM connected to real network. Then, requirements are discussed the scope their suitability for testing. In what follows, architecture photovoltaic is and assigned responsible component categorized. As some associated with approach practice specific distribution systems, system operators Czechia...

The paper aims at methods for compliance testing of power-generating modules (PGMs) or their components. discussion include power-hardware-in-loop (PHIL), controller-hardware-in-loop and novel simulated input PHIL (SI-PHIL) techniques. advantages disadvantages the test techniques feasibility laboratory field settings are presented. In following, SI-PHIL approach to verify selected PGM requirements related static network support is demonstrated on an inverter based model. Further necessity...

This paper deals with testing of photovoltaic inverters frequency response using a test facility located in REsLAB at the Department Electrical Power Engineering, Brno University Technology. It includes practical experience site, procedure for verification and description tested devices. Overall, six devices were tested. The presented results measurements are graphically processed subsequently compliance relevant standards national grid code is evaluated. conclusion contains summarization...

Paper presents a research related to the design of new concept hybrid energy system. It describes actually used concepts and benefits design. Subsequently, problems proper systems setting working conditions are discussed settings is presented. Research further enhanced by comparing with simulation model assuming weather data acquired for test location. The measured compared results simulation.

The paper is focused on advanced approaches to resistive adaptive demand response control into heat accumulation, implemented in installations with a small-scale power generating unit order provide real equilibrium between electricity generation and consumption. Current novel flow strategies are compared regards 1) Power Quality (flicker, harmonics, etc.), 2) relevant energy measurement using standard revenue meters 3) total cost of installation. Finally, topologies converters, which...

The paper deals with operational notification of power generating modules focus on compliance verification processes involvement third-party bodies issuing equipment certificates. introduced by EU Commission are analyzed and systematized, further, their needful beneficial development has been identified proposed. In following, means techniques the (compliance testing, simulation, monitoring) respective use cases limitations described upgraded. Finally, timeline for process throughout...

This paper presents a control concept of virtual power plant with analysis measured data controlling distributed energy sources and storage system. The aim the presented is to demonstrate compare possibilities source system in parallel operation grid.

The paper presents the models of individual elements in energy system created Matlab Simulink. reason for modeling is prediction behavior subsystems. In cooperation with validated are solved operational problems and power quality issues that further discussed.

This paper presents methods of photovoltaic panel inspection in the field. The aim is to verify value on-site tests. basic parameters for comparing quality panels are indicated by manufacturer’s datasheet. Diagnostic field commonly uses a combination different analyzers and infrared cameras. compares evaluation at climatic conditions special analyzer, conventional analyzer with recalculation according IEC standards flash tester. comparison has been performed practical experience from...

In connection with the development of infrastructure for electric vehicles (EVs) is in this article presented complex mathematical analysis operation fast charging station (FChS) integrated battery and by promoting photovoltaic (PV) system. The goal simulation operating conditions was to demonstrate possibilities (advantages disadvantages) batteries during FChS their possible impact on point low voltage (LV) network.

This paper deals with calculations of maximum values photovoltaic power, which can be connected into low voltage distribution grids regarding to currently valid legislation. A particular grid, consisting a radial feeder, is considered. The are carried out for several variants that expected have positive impact from connectable power increasing point view. Variants involve utilization autonomous inverters regulation functions or reinforcement the grid infrastructure as well combination these...

This paper deals with the non-standard behavior of a hybrid inverter equipped external measurement, which was observed during one many tests performed in ResLab laboratory at Brno University Technology. It focuses on control processes intend to maintain power flow balance within system consisting photovoltaic source, battery storage and load. The contains theoretical background, description configuration together equipment used for test purposes, simulated scenario, measurements results its...