Construction Of Transmission Lines Research Articles

Local knowledge, perceptions and the cultural significance of the Red Panda (Ailurus fulgens) in the Himalayan Kingdom of Bhutan

ABSTRACT Bhutan has an extensive protected area network and people living inside are integral partners with the conservation landscape. Despite this, little is known on local people’s traditional knowledge, cultural beliefs, and perceptions on wildlife. We investigated drivers of local knowledge, threats and cultural significance of the red panda (Ailurus fulgens) through semi-structured questionnaire surveys (N= 664 participants) on local residents in Jigme Dorji and Phrumsengla National Parks. A conditional inference tree analysis explained that knowledge of the red panda and encounters with the species varied by demography, occupation and locality. Although the majority of respondents were not knowledgeable of the species, residents living within the elevational range of red pandas exhibited greater knowledge. Civil servants, farmers, foresters, park staff, and teachers also had significantly greater knowledge of red pandas than monks, road workers, and students. Informally educated older (≥41 years) respondents placed higher cultural significance on the red panda relative to much younger respondents. Although past studies in Jigme Dorji National Park have identified habitat destruction and fragmentation due to linear infrastructural development – such as the construction of new power transmission lines – as significant anthropogenic threats to the red panda, respondents listed only non-timber forest products collection, forest fires, timber and firewood harvesting, climate change, livestock grazing, and kills by domestic dogs as some of the most prevailing threats to the red panda in our study area. Recognizing and incorporating the intrinsic value of wildlife within the protected area–people framework and utilizing traditional cultural perceptions of threatened species like the red panda, can be a valuable tool in strengthening public support for species conservation. This study further advocates an urgent need for educational programs to promote ecological and cultural values of the red panda in schools and the wider public.

Research on the area of mechanized construction of transmission lines

In order to continuously improve the construction capacity of power grid projects, improve the level of construction technology, and promote the transformation and upgrading of construction enterprises, power companies actively promote the mechanized construction of transmission lines. On the basis of summarizing the existing calculation rules of mechanized construction area, through on-site investigation and extensive collection of funds, research and excavate indicators that adapt to the new situation and new regulations. According to the actual area composition of the mechanized construction site, scientific calculation rules are formulated by modeling analysis and other methods. Compare and verify the calculated area of the new rule with the actual compensation area and the calculated area of the original rule, and propose a complete set of calculation rules for mechanized construction area, which has the conditions and value for popularization and application.

Corporate Social Responsibility in China’s Overseas Mining Projects

With the acceleration of the pace of “going global”, Chinese enterprises are investing in more and more non-ferrous metal mining projects abroad, with both successful experience and many lessons. After five years of efforts, Chinalco Toromocho Copper Mine in Peru has been built into a world-class mine project with “social respect, employee pride, excellent benefits and environmental friendliness”, which is widely regarded as a successful example of investment outside China. This paper reviews the successful experience of Chinalco’s Toromocho Copper Mine in fulfilling its social responsibilities in terms of relocation of new town, sewage treatment, etc., and the crisis public relations for emergencies such as blocked transmission line construction and pollution discharge crisis in rainy season, in order to provide beneficial experiences and thinking on social responsibility for other local enterprises from “going out” to “staying”, and finally stepping into “integrating in”.

초고압 AC/DC 송전선로 병행에 따른 상호 유도현상 연구

In general, large-scale power generation such as nuclear power and thermal power have low social acceptability, so they are mainly located on the coast far from densely populated urban areas. Due to this discrepancy between production and consumption regions, construction of a new transmission line is essential, but in Korea, it is very difficult to secure a place for transmission lines due to the narrow land area and negative perception of transmission towers. In this regard, the construction of an additional transmission line is currently under consideration to provide a stable supply of new power generation along the east coast to the metropolitan area, and in this case, it is highly likely that the existing transmission line will be very close to the new HVDC transmission line. Therefore, in this paper, we assumed the construction of a new 500kV HVDC transmission line to transmit an additional power source from the east coast to the metropolitan area, and analyzed the mutual induction phenomenon that occurs when operating close to the existing AC 765kV transmission line. When ultra-high voltage AC/DC transmission lines are operated in close proximity and parallel, electrostatic induction and electromagnetic induction occurs. We analyzed how much influence each other in the normal condition and the fault condition, and considered it from the point of view of protection cooperation. For the analysis, it was modeled assuming the existing Shintaebaek-Singapyeong 765kV transmission line and the newly built Shinhanul-Singapyeong 500kV HVDC transmission line, and reviewed through PSCAD/EMTDC.

Monitoring and Early Warning of Transmission Line External Breakage Based on Satellite-Ground Coordination

This article first proposes a high-precision spatio-temporal registration method between satellite remote sensing images and ground sensors. Then, using satellite remote sensing images, an intelligent identification model for typical external damage hidden dangers of transmission lines based on satellite remote sensing is established to realize intelligent identification of transmission line construction work areas and mining affected areas. Aiming at the results of intelligent identification of construction work areas and mining-affected areas, the proposed YOLOv4-based external damage identification algorithm for transmission lines is used to detect external damage hidden dangers. Through the method in this paper, it is possible to realize a regular general survey of hidden dangers of external damage (construction work area, mining affected area) with full coverage of transmission channels, and carry out targeted 24-hour monitoring on the ground. The test results show that the satellite-ground coordinated transmission line external damage monitoring and early warning in this paper. The method timely and accurately realizes the monitoring and early warning of the external breakage of the transmission line.

Technical Control of Transmission Line Construction Quality in Power Engineering Construction

Technical Control of Transmission Line Construction Quality in Power Engineering Construction

Research on Risk Management of Transmission and Distribution Line Construction Project

Research on Risk Management of Transmission and Distribution Line Construction Project

A Brief Analysis of the Technical Problems of Power Engineering and Transmission Line Design and Construction

A Brief Analysis of the Technical Problems of Power Engineering and Transmission Line Design and Construction

Key Points of Construction and Quality Control of Transmission Line in Communication Engineering

Key Points of Construction and Quality Control of Transmission Line in Communication Engineering

Influences of Cross-Sea High-Voltage Transmission Lines on Navigational Aids

With the development of high-voltage electric power industry and the construction of cross-sea transmission projects in coastal ports, the interference of cross-sea high-voltage transmission lines on the performance of ship navigation aids gains considerable attention. The navigation safety control measures for ships crossing the waters of high-voltage transmission lines are proposed to study the navigational safety of the waters for the construction of high-voltage transmission lines across the sea. Conclusions with certain reliability are also drawn based on the analysis of the reasons and mechanisms of the interference phenomenon for the reference of maritime and scientific researchers. The images or signals of interference under the electromagnetic radiation from maritime shore-based radars, shipborne radars, shipborne VHF and GPS equipment through high-voltage transmission lines are obtained through on-site and actual ship testing.

Analysis of Environmental Impacts Caused by the Construction of Power Transmission Lines in Brazil

A country's energy production, transmission and distribution systems are directly linked to its technological advances and economic growth. In Brazil, the creation and expansion of several transmission lines are planned. Such ventures often come up against environmental aspects, as they advance over forest and conservation areas. In this context, the objective of this research was to study the main environmental impacts caused by the implementation of transmission lines in forest areas in order to have a better understanding of the subject, thus being able to minimize or extinguish them. After gathering information, it was found that most of the environmental impacts are due to the deforested area around the transmission lines, called the right of way, which creates a corridor that alters the vegetation. Other serious impacts are related to the type of foundation most used: the micropile, which uses a toxic stabilizing mud in its drilling. The results of this research can be used as a basis to minimize such impacts that can cause damage to the environment and delays in the construction of the lines.

Conductors in Cryogenic Environment Used in Power Engineering

The tendency to increase the carrying capacity of the electric load in the supply networks can be done in two directions, namely:• the construction of several transmission and distribution lines linking the energy source to the consumer (current trend),having the effect of damaging the environment, or• limiting the construction of transport lines and, implicitly, the destruction of the environment by using technologies and materialscapable of carrying a very large amount of electricity.

Simulation and Analysis of the Posture of Walking Board of "One-Pull-Four" Tension Stringing in Small Span Length

With respect of the gap in current "one-pull-four" tension stringing simulation calculation, a "one-pull-four" tension stringing numerical simulation model is established relying on the Ya'an II~Ziyang 500kV line project, based on ADAMS software, and the posture of walking board is discussed to obtain the influence relationship between the central deflection coefficient of the conductor and the posture of the two in this paper. In the range of small span length, the method of selecting the value of central deflection coefficient suitable for conductor steering is determined through simulation analysis of steering, which provides a basis for the actual construction of power transmission and transformation lines.

Study on Risk Analysis and Structural Safety Performance of Material Ropeway Construction of Transmission Line

Material ropeway transport runs through the whole construction process of transmission line. It is operated frequently with long working period and its structural components are easy to produce fatigue, wear, deformation and other defects. The result is to form safety risks and cause personal and property losses, which is the focus of construction safety. This paper first summarizes the common construction safety risk factors of material ropeway and analyzes the causes of the risk points. Then, safety assessment method of material ropeway of transmission line is proposed. The method considers with the coupling dynamic factor of working ropes and running car and the states of carrying rope, pulling rope, trestle, saddle, anchor underground, etc. is analysed in whole process of transportation. The safety evaluation method is suitable for different topographic conditions and structural types of material ropeway, which provides technical means for the construction check and evaluation of material ropeway.

Construction and Modeling of Multi-Circuit Multi-Voltage HVAC Transmission Lines

A transmission network’s main objective is to continuously supply electrical energy to consumers. This article presents an analysis of the use of multi-circuit, multi-voltage overhead lines as a compromise between ensuring the system’s safe operation by increasing the transmission network capacity and managing the constraints related to its expansion. The considerations presented in this work include the construction of such lines, their operation, and modeling aspects. As part of the study, the potential for improving the environmental conditions around the lines is discussed in terms of the necessary area for their construction and the peak electromagnetic field strength in their vicinity. We also present a mechanical analysis of stress and sag coordination in the individual circuits of these lines. Then, we detail the method for determining the electrical parameters of multi-voltage lines’ series impedances and capacitance. Specific attention is given to the possibility of zero-sequence voltage that occurs in the systems despite the symmetric supply and load of circuits—especially in the circuits with the lowest voltages—that result from the line’s geometric asymmetry. We evaluate the impact of the line’s geometric asymmetry on the power system’s correct operation by determining the asymmetry factors. Finally, the accuracy of using a simplified symmetric model for lines with various geometric asymmetries is analyzed by studying the error of the short-circuit currents.

Location of overhead power lines within Bukowe hills mesoregion in relation to the assessment of forest area fragmentation

National power grid in Poland requires modernisation, therefore by 2030 numerous actions are scheduled regarding the expansion of the existing network and the construction of new electricity transmission lines (power lines). The planned activities will undoubtedly change the quality of landscape and result in fragmentation of forest habitats, some of which are characterised by high biodiversity and constitute a key element of ecological corridors. The aim of the present paper was to outline the issue of the impact of the power line corridors on forest habitat fragmentation, as well as to present the GuidosToolbox software (Graphical User Interface for the Description of image Objects and their Shapes) used, among other things, for the determination of the degree of fragmentation of forest habitats. The analysis concerned the Puszcza Bukowa forest, which is a part of the Natura 2000 network and is protected under the Szczecin Landscape Park ‘Puszcza Bukowa’. Despite abundant natural assets of the Puszcza Bukowa forest, it was necessary to run many power lines through its area due to location of the forest in the vicinity of the Szczecin agglomeration. The course of power lines contributed to the fragmentation of the discussed forest complex and to the depletion of its interior classified with the GuidosToolbox software as ‘Intact’. The software discussed in the present paper may prove useful in the identification of the degree of forest area fragmentation, connected with the course of high-voltage power transmission lines, and in the assessment of the impact of the planned investment projects on biocenoses.

The Prospect of Using Renewable Energy in Russia

The features of Russia is the low population density on huge, poorly developed lands in terms of production. About 20 million people live in the territory where there is no centralized power supply, power supply is organized on generating systems running on imported fuel. (Research purpose) The research purpose is in studying the prospects for the development of microgrids based on the use of alternative energy generating systems of renewable energy sources using a micro-gas turbine plant as the base generator, which is the source of the reference voltage of microgrid based on single-wire resonant distribution networks of a new generation in Russia. (Materials and methods) The article presents the prospects for the development of microgrids based on material taken from open sources. Authors applied the methods of scientific analysis of events, facts, materials, and conclusions. (Results and discussions) The article shows that the world energy system evolutionarily enters a new fourth stage of fundamental transformation, called the "Energy Transition". The creation of microgrids based on renewable energy sources with a basic micro-gas turbine unit and single-wire resonant distribution networks of a new generation is an indisputable proof of this energy transition. (Conclusions) In many countries of the world, there is an increase in the share of distributed generation based on renewable energy sources, the introduction of new centralized generation capacities is reduced, investments in the construction of large power plants and new high-voltage transmission lines are reduced due to the development of distributed generation. Distributed generation contributes to the rapid expansion of electricity production without the need for additional development of the power grid infrastructure.

Innovation and modernization of the Russian energy sector

Russian energy sector is suffering from the economic, financial, and political sanctions imposed by the United States and the European Union. These sanctions have prevented Russia from accessing oil and gas resources and from exporting natural gas. Low oil prices, combined with sanctions against Russia, can be blamed as a possible cause of Russia’s collapse as an energy producer and consumer. However, the country is struggling to modernize its energy balance. Specifically, Russia’s major modernisation efforts have focused on the energy sector and related industries and services. In support of economic growth and social development, the 2003 Energy Strategy made substantial investments in energy infrastructure, such as the construction of new power stations, transmission lines and power plants. This paper focuses on the recent innovation and modernization trends of the Russian energy sector. It discusses the history and the developments in this sector up to this day, provides some insights into modernization efforts of the sector and describes the perspectives for the deployment of the renewable energy sources.

Application of radar measurement technology in 3D surveying and mapping of transmission lines

This paper briefly introduces the background, significance, and development status of 3D radar technology at home and abroad, and then explains the concept, working principle, system composition, and workflow of the radar system. Combined with the current development trend of smart grids, it focuses on the application scope of this technology in the field of transmission line construction, operation, and maintenance. Then, through the specific implementation of the project cases, the daily operation and maintenance of four 500 kV transmission lines in Nanjing have played a certain guiding role. Finally, according to the development trend of smart grid and the actual demand of power system production and business integration, this paper briefly prospects the function expansion of this technology in transmission line operation evaluation, fault analysis and diagnosis, emergency rescue plan formulation, and other fields.

Aperiodic steady-state stability criterion of electric power system with controlled series compensation on 200 kV line

Currently there is a need to synchronize operation of the electric power system in the remote areas and increase of existing lines transmission capacity. The construction of new power transmission lines involves high economic expenditures. Well-known papers consider the issues of application of controlled series compensation devices only for long-distance power transmission lines with voltage of 500 kV and higher to increase the transmission capacity and the level of stability. The aim of the study is to increase the stability and the limit of the transmitted power when controlled series compensation devices are installed on 220 kV lines. It is necessary to develop a criterion of aperiodic steady-state stability of an electric power system with a 220 kV-controlled power transmission line. Methods of mathematical modeling of electric power system, the theory of long-distance power transmission lines and electromechanical transients, and methods of analyzing electric power system stability were used. A.M. Lyapunov’s first approximation method was used to develop a simplified mathematical model. We applied the developed software as a simulation tool. An analysis was carried out to study the influence of series compensation devices regulation coefficients on the aperiodic steady-state stability of the electric power system and the transmission capacity of 220 kV power transmission lines. A change in the modulus of voltage drop at the power transmission and the angle characteristics under the influence of the regulation coefficients of the series compensation device was revealed. A criterion of aperiodic steady-state stability has been developed for systems of this kind with controlled series compensation. It differs from traditional ones by considering the changes in the voltage drop in the power transmission and it allows more accurate estimation of the proximity to the stability threshold. An assessment of aperiodic steady-state stability according to the formulated criterion for an electric power system with a controlled series compensation device on a 220 kV line was obtained. The values of the control coefficients of the series compensation device have been determined. No violation of the steady-state stability occurs under the given values. The results can be used to solve the issues of increasing the transmission capacity of transmission lines to improve the stability of the system.