The evolution of the digital transformation presents new challenges and many opportunities, provides unique solutions to individual issues, both for sectors regions. posed by world have a significant impact on social economic processes, as well our environment. This paper aims provide an indicator-based understanding main characteristics digitalization promoting sustainable development in member countries Visegrad Cooperation. goal this research is study relationship between sustainability...

Dissolved gas Analysis (DGA) is a widely used technique to estimate the condition of oil-immersed transformers. The measurement level and change combustible gases in insulating oil trustworthy diagnostic tool which can be as indicator undesirable events occurring inside transformer, such hot spots, electrical arcing or partial discharge. objective this paper mainly analyze available data from DGA, investigate that may useful quantitative modeling transformer's reliability. There are...

Climate change and agriculture interact with each other in many ways have a complex impact. The sector needs to be prepared adapt the expected effects of climate change, emphasis must placed on prevention achieve emission reduction targets. research explores current situation agricultural sector, risks as well Climate-Smart Agriculture (CSA) solutions that appear at Hungarian agribusiness. Examining innovation activities farms shows coherence practical application. is based questionnaire...

As both electricity generation and consumption trends change rapidly nowadays, Dynamic Line Rating (DLR) technology is becoming more popular in case of transmission distribution grids. Depending on the goal its application, it an efficient way handling controlled temporary or long-term overloads, increase operational safety, provide solutions for anti-icing, even gather a large number input data asset management expert systems by sensors installed grid.

One of the key issues during integration widely spreading renewable energy sources into electric transmission system is management generated surplus power. There a new and cost-effective way to handle this problem, so-called Dynamic Line Rating (DLR). are several realization options for implementation, such as soft-computing methods, physical models or use overhead line monitoring systems. The aim paper demonstrate advantages DLR calculation method in case using mathematical numerical...

Power transformers being the major apparatus in a power system, thus assessment of transformer operating condition and lifespan have obtained crucial significance latest years. Dissolved gas analysis (DGA) is sensitive reliable technique for detection incipient fault within oil-immersed transformers, which provides basis diagnostic evaluation equipment health. The first part this paper deals with an expert system that utilizes fuzzy logic implementation into dissolved oil technique. To...

Exceeding the electric field’s limit value is not allowed in vicinity of high-voltage power lines because both legal and safety aspects. The design parameters line must be chosen so that such cases do occur. However, analysis several operating Europe found field strength many exceeds legally prescribed for general public. To illustrate this issue its importance, measurement finite element simulation results low-frequency are presented an active 400 kV line. purpose paper to offer a new,...

Dynamic Line Rating is an effective way of uprating transmission lines in a cost efficient way, without reconductoring old lines, or building new ones. Uprating equipment found power systems has always been issue. Having higher ampacity rates over line due to DLR, increased thermal stress occurs not only on the conductors, but insulators, and other pieces as well. Increased resulting temperature conductors brings about increase sag, thus electrical clearance might be violated with...

Nowadays different live-line maintenance methods are widely applied because of their economic and technical benefits. The valid regulations not always strict enough to guarantee the proper safety workers. In these criteria investigation is shielding electric field. way shield field wellknown: all conductive clothing on high voltage follow principle a Faraday cage. Although this seems theoretically easy, in practice many cannot during work. It necessary compare determine which construction...

Nowadays live-line maintenance (LLM) is one of the most common methods to repair and maintain energized elements power grid. The main advantage this technique that it represents a balance between technical economic factors: no consumer disturbance needed, there not any service outage caused losses can be kept as low possible. Because these reasons different are becoming more popular on all voltage levels. Special techniques available for low, middle high grids. On levels "barehand method"...

The purpose of this paper is to present the sensor placement strategies that currently determine thermal monitoring phase conductors high-voltage power lines. In addition reviewing international literature, a new concept presented based on strategy centered following question: What are chances overload if devices only placed in certain tension sections? concept, number and installation location sensors determined three steps, type tension-section-ranking constant introduced universal space...

Based on the latest researches and guidelines of International Commission Non-Ionizing Radiation Protection (ICNIRP) extra-low frequency (ELF) electric magnetic fields have several short-term long-term health effects. The effects these is detectable, but are mostly unknown - results epidemiological investigations available only. Basically determined by voltage an equipment generated currents flowing through conductors. In case high (HV) live-line maintenance (LLM) both levels could endanger...

During the repair processes of power lines with live line maintenance method workers are effected to time-varying electromagnetic fields. The extra low frequency (ELF) electric and magnetic fields which generated surrounding phase conductors cause both current through human body eddy current, as well. To protect against fields, many types conductive suits used. These do not act a perfect Faraday cage, because there "Faraday holes" on them. Simulations by finite element laboratory...

In case of high voltage live-line maintenance (LLM), proper handling issues related to electric fields is important because the power transmitted at levels. Conductive clothing are most common protective equipment shield extra low frequency (ELF) fields, acting as a Faraday-cage. Inspections have been executed High Voltage Laboratory Budapest University Technology and Economics regarding misses current international standards regulations for inspection conductive clothing.

The actual life of transformers strongly depends on the real operating conditions and residual these units can spread in a fairly broad scale. key factor is presence moisture ageing products because they influence condition oil-paper insulation. Therefore recent attention has been directed to methods determining content transformer. There are two fundamental dielectric processes transformer insulation: conduction which characterized by conductivity, polarization spectrum. Both very strict...

The security of supply with a high level operational safety and has prominent role in the domestic international electricity networks. Due to continuous growth consumer demand, integration renewable energy sources other related changes market issues, number problems challenges operation utilization existing network have been identified. need for higher transmission capacity is one major network. Dynamic Line Rating (DLR) new generation transfer methods that can provide cost-effective...

Uprating power lines has become an issue with the increasingly widespread application of non-conventional plants, and as power-demand on user-side increases continuously. There are several possible solutions to these problems, one them is Dynamic Line Rating (DLR). The method DLR suggests a relatively cost efficient course action in order exploit higher ampere capacity reserved line conductors. To get operate at average loads different influential factors need be taken into account real...

In case of transmission and distribution networks, extra low frequency (typically 50 or 60 Hz) electric magnetic fields have to be taken into consideration separately from each other. Health effects been documented exposures both types fields. Magnetic are qualified as possibly carcinogenic humans (category "2B") by WHO's cancer research institute, International Agency for Research on Cancer (IARC), so it is essential protect the workers against their harmful effects. During live-line...

This paper aims to demonstrate the performance and reliability analysis of a dynamic line rating (DLR) system at Bulgarian demonstration site FLEXITRANSTORE project. As part project, various manufacturers’ different monitoring DLR sensors weather stations were installed on 110 kV double-circuit overhead (OHL). These devices provided input parameters based objective measurements. used statistical tools examine accuracy devices, thus making products from manufacturers comparable. In addition,...

The key issues during the operation of transmission system is integration renewable energy sources, increasing demand for and spreading distributed generation. capacity overhead lines should be increased to satisfy above-mentioned questions, while high level safety also provided. Dynamic Line Rating (DLR) calculation methodology offers a cost-effective way determine ampacity in real-time. This method not only increases line, but improves operational with forecast thermal overloads, which...

Power transformers are the most important and expensive equipment in electrical transmission systems. The average age power system Hungary is approximately 25 years. It not economical to replace these only because of their age. We have know manage more information about insulation, status insulation determines expected lifetime. A transformer can be operated efficiently, reliably economically, if we its actual state expanding on all essential information. operational reliability influenced...