Showing 1-25 of 32,797 resultsfor "Index Terms":Line Distance
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Numerical distance protection performance analysis in short and long transmission lines using real time digital simulation
2008 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America
Year: 2008 | Conference Paper |
The main purpose of this work is to present a performance analysis of numerical distance protection applied in high voltage transmission lines, more specifically in the 500 kV transmission lines of CEMIG (Energy Company of Minas Gerais - Brazilian Energy Utility) between the Vespasiano 2 - Neves 1 (short line - 23.9 km) and Vespasiano 2 - Mesquita (long line - 148.6 km) substation. The need for en...Show More
Information on the concepts of protection of ac transmission 1ines is presented in this guide. Applications of the concepts to accepted transmission line protection schemes are presented as well. Many important issues, such as coordination of settings, operating times, characteristics of relays, mutual coupling of lines, automatic reclosing, use of communication channels, are examined. Special pro...Show More
Straight Line Detection Using Euclidean Distance Between Consecutive Pixels
2021 International Conference on Engineering and Emerging Technologies (ICEET)
Year: 2021 | Conference Paper |
Cited by: Papers (2)
Lines play a very important role in image processing and computer vision. They are a clue or a feature that enables further processing of an image, both in the image processing and computer vision fields. It is therefore imperative that they are accurately extracted or detected. The clues obtained from an image are used to calculate the line parameters, which tends to be an efficient way to detect...Show More
Research on the Protection Range of Distance Protection Zone I for Short Transmission Line
2018 China International Conference on Electricity Distribution (CICED)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
This thesis mainly analyzes the applications of distance protection zone I for short transmission line or weak-infeed. It demonstrates the calculation method of shortest length of transmission line that distance protection zone I can be applied at power source side and gives suggestions of setting calculation. Moreover, it analyzes the large error between measured impedance value and actual fault ...Show More
The research on binocular ranging technology for transmission lines based on two - dimensional line matching
2020 IEEE Conference on Telecommunications, Optics and Computer Science (TOCS)
Year: 2020 | Conference Paper |
Cited by: Papers (2)
Using binocular distance measurement technology to obtain the distance between the dangerous object and the transmission line, which provides powerful data information for the judgment of the risk degree of external damage and the assessment of the probability of the line suffering from external damage, so as to ensure the safety of the line. In order to solve the problem of large epipolar error c...Show More
A Deep Learning-based Study of Terrain Classification and Distance Optimization for Transmission Lines
2024 4th International Conference on Smart Grid and Energy Internet (SGEI)
Year: 2024 | Conference Paper |
The current terrain classification of transmission lines is generally target classification or fixed-point classification, which lacks comparability and leads to the reduction of the optimization frequency of a single transmission line, so we propose to study the terrain classification and distance optimization of transmission lines based on deep learning. According to the current measurement, dat...Show More
Charging Current Compensation for Distance Protection
One difficulty of the application of line protections to long transmission lines is the influence of the large capacitance of the line. When a fault occurs on a long line, relatively large magnitude harmonic components of current and voltage are superimposed on the fundamental frequency component due to the large capacitance of the line. This harmonic component can cause oscillation of the distanc...Show More
New Approach for Precisely Measuring the Zero-Sequence Parameters of Long-Distance Double-Circuit Transmission Lines
Based on transmission-line equations and the distributed parameter model, a new approach is proposed to accurately measure the zero-sequence parameters of long-distance double-circuit transmission lines using voltages and currents measured at the ends of lines. The mathematical model of the proposed method is explained in detail, and the differential equations of two coupled lines with different s...Show More
Air-Gap Discharge Characteristics in Foggy Conditions Relevant to Lightning Shielding of Transmission Lines
Sakae Taniguchi;Shigemitsu Okabe;Takeshi Takahashi;Takatoshi Shindo
The features of lightning shielding of transmission lines have been calculated using the electrogeometric model (EGM) proposed by Armstrong and Whitehead. Discrepancies, however, have been found in the case of ultra-high voltage (UHV)-designed transmission lines. UHV-designed transmission lines often pass through high-altitude mountain areas, where foggy or rainy conditions are common when there i...Show More
A novel distance protection algorithm for long-distance transmission lines
12th IET International Conference on Developments in Power System Protection (DPSP 2014)
Year: 2014 | Conference Paper |
Cited by: Papers (7)
In this paper, a novel distance protection algorithm for long-distance transmission lines is introduced to cater for the problems of the influence caused by distributed capacitance in the long-distance transmission lines and the low fault resistance tolerance by traditional distance relays. To tackle the problem caused by the distributed capacitance in the transmission line, the observing point is...Show More
The electric energy loss in overhead ground wires of 110kV six-circuit transmission line on the same tower
Hui Wang;Luyang Wang;Yufei Wang;Hua Xue;Changhui Yang;Tianyou Yan
In order to provide theoretical guidance for reducing the electric energy loss of 110kV six-circuit transmission line on the same tower, the factors affecting electric energy loss in overhead ground wires are deeply studied. Firstly, the model of 110kV six-circuit transmission line on the same tower is established in MATLAB. Secondly, the effect of phase sequence arrangements on electric energy lo...Show More
Transmission line distance protection with Dynamic Thermal Line Rating support
11th IET International Conference on Developments in Power Systems Protection (DPSP 2012)
Year: 2012 | Conference Paper |
Worldwide analysis of recent wide area cascading failures has shown that very often they were mainly caused by the maloperation of the third zone of a distance protection relay. The load encroachment and power swing phenomena are the two dire problems to solve when dealing with the third zone of distance protection. The vast number of blackouts could have been avoided or the consequences lowered i...Show More
Application Studies on the Active SISFCL in Electric Transmission System and Its Impact on Line Distance Protection
The application of superconducting fault current limiters in transmission systems is very attractive because the devices offer superior technical performance in comparison to conventional methods to limit fault currents. The superconducting fault current limiters show high impedance during fault period and negligible impedance in the circuit during normal operating conditions. This paper illustrat...Show More
This paper deals with the fault location on high voltage series compensated lines. A new approach to evaluate the fault distance is proposed. The distributed-parameter line equations are preferred to describe the overhead lines. The algorithm uses two-terminal measurements, but those data do not require synchronization. No information on the fault resistance value and on the fault type is necessar...Show More
Research on the distance protection performance for untransposed parallel transmission lines based on six-phase parameter information
Wenzhe Chen;Zhiguo Hao;Jun Guan;Yiqi Dang;Dingxiang Du;Xingguo Wang
2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC)
Year: 2016 | Conference Paper |
Cited by: Papers (2)
For untransposed parallel transmission lines, the fault impedance measured by relays will be affected by both the mutual impedance between parallel lines and the coupling effect of different sequence components in the single line. Even the fault phase voltages are compensated by the zero-sequence current in the adjacent line, the errors of measured fault impedances are still quite large. The perfo...Show More
Power Lines Extraction and Distance Measurement from Binocular Aerial Images for Power Lines Inspection Using UAV
2017 9th International Conference on Intelligent Human-Machine Systems and Cybernetics (IHMSC)
Year: 2017 | Conference Paper |
Cited by: Papers (14)
With the development of autonomous perception and obstacle avoidance technologies for power lines inspection using unmanned aerial vehicles(UAV), the methods of power lines extraction and distance measurement from binocular aerial images become the spotlights gradually. In this paper, the Ratio detection operator and fast Hough transform are adopted to extract the pixels of power lines and detect ...Show More
General recommendations for performing maintenance work on energized power lines are provided. Technical explanations as required to cover certain laboratory testing of tools and equipment, in-service inspection, field maintenance and care of tools and equipment, and work methods for the maintenance of energized lines and for persons working in the vicinity of energized lines are included.Show More
Research on Traveling Wave Fault Location of Transmission Lines Based on Particle Swarm Optimization Algorithm
2023 International Conference on Power, Electrical Engineering, Electronics and Control (PEEEC)
Year: 2023 | Conference Paper |
Most transmission lines are exposed to the outdoor environment, especially cross-regional transmission lines, cross-mountains and rivers. Therefore, in the power system, transmission lines have the highest probability of failure in various components of the power system due to their working environment and other reasons. In this paper, based on PSO (Particle Swarm Optimization) algorithm, travelin...Show More
Improved Time-Domain Distance Protection Scheme Based on RLC Model for Wind Farm Transmission Line
2023 3rd Power System and Green Energy Conference (PSGEC)
Year: 2023 | Conference Paper |
The long-distance transmission lines of large-scale wind farms have significant capacitance currents distributed to the ground, which significantly impacts the adaptability of existing time-domain distance protection based on the RL models. This paper studies a time-domain distance protection scheme based on the RLC model. Firstly, the applicable frequency band differences of RL, RLC, and distribu...Show More
Information on the concepts of protection of ac transmission lines is presented in this guide. Applications of the concepts to accepted transmission line protection schemes are presented as well. Many important issues, such as coordination of settings, operating times, characteristics of relays, mutual coupling of lines, automatic reclosing, use of communication channels, are examined. Special pro...Show More
The study of ground distance protection of 500kV quadruple-circuit transmission lines on the same tower
2008 43rd International Universities Power Engineering Conference
Year: 2008 | Conference Paper |
Cited by: Papers (2)
This paper presents a kind of algorithm, which can decouple the electrical quantities of quadruple-circuit transmission lines and get completely independent 12 sequence components of quadruple-circuit transmission lines on the same tower system. Based on the analysis of transformation matrix and the impedance matrix of 12 sequence components, the principle of ground impedance relay and the corresp...Show More
Distance protection scheme with travelling wave for UHVDC transmission line based on wavelet transform
2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies
Year: 2008 | Conference Paper |
Cited by: Papers (5)
The ultra high voltage direct current(UHVDC) is the important technical means for the solution of high voltage, large capacity, and long distance power transmission. ±800KV UHVDC transmission technology will be used in the projects which transfer hydroelectric power in Yunnan Province and Jingshajiang river to Guangdong Province and Shanghai and other places in China. Along with the rapid developm...Show More
Transmission Line Safety Distance Measurement and Data Online Fusion Processing Technology Based on Multi Physical Quantity Sensing
2023 3rd International Conference on New Energy and Power Engineering (ICNEPE)
Year: 2023 | Conference Paper |
To address the real-time monitoring challenges of mechanical collision prevention for power transmission lines, this paper developed a warning device based on multiple sensor sources and proposed a transmission line warning algorithm based on multisensor fusion. The effectiveness of the algorithm was validated in real-world scenarios. The warning device based on multiple sensor sources first emplo...Show More
Implementation of Intersubstation IEC 61850 GOOSE Message for Distance Protection Scheme with Teleprotection
2022 International Conference on Technology and Policy in Energy and Electric Power (ICT-PEP)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
Transmission line protection system isolates transmission lines from both temporary and permanent faults. For many years, distance protection relays have been used to provide a simple yet reliable transmission line protection system. Distance protection has several protected zones based on transmission line impedance measurements, typically zone1 as main protection, zone2 and zone3 as remote backu...Show More
Fault resistance investigations for faults in double-circuit double-fed transmission lines
Mohamed F. Abdel-Fattah;Asem A. El-Alaily;Zaghlol S. El-Razaz
2016 17th International Scientific Conference on Electric Power Engineering (EPE)
Year: 2016 | Conference Paper |
Cited by: Papers (1)
This paper presents investigations into the effect of the fault resistance on the fault current levels in double-circuit, double-fed transmission lines to highlight effects such as intercircuit mutual coupling and the remote source infeed. A current amplitude comparison algorithm that supervises all the six currents is used for the investigations. The investigations are based on different fault an...Show More
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