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In 2009 the Transport System Operator of the Power Grid in Romania (CNTEE Transelectrica SA) has initiated several SMART GRID pilot projects to monitor and diagnose online the power stations and high voltage lines, as support for accurate decisions on operation and maintenance activities, respectively for intelligent asset management. In Romania, the technical conditions for the on-line OHL monitoring...
Numerical modeling of transmission tower-line systems subjected to stochastic wind loads is presented. Dynamic responses of transmission tower-line systems with different structural parameters in stochastic wind fields with various average wind velocities are carried out by ABAQUS software. Based on the dynamic swing angles of the insulator strings, dynamic wind load factors are suggested to determine...
Combining with the intelligent monitoring requirements of high-voltage conductor galloping, this paper proposed a design to monitor the conductor galloping parameters. The proposed design could satisfy the demand of frequency-amplitude transforming integration, proposed a honeycomb hexagon model of nodes distribution and a kind of high energy-efficient hierarchical model, it could satisfy the requirement...
The 1000 kV alternating current(AC) power transmission project from Southeast Shanxi via Nanyang to Jingmen is the first ultra high voltag(UHV)project in China,and is the first long-running UHV with rated voltage in the world.In order to achieve the icing on-line monitoring on this 1000 kV UHV transmission lines, this paper summarized the current situation and drawbacks of the icing on-line monitoring...
Due to comply with current environmental requirements, the transmission tower with unequal legs are more often used in recent years. 500 KV linear transmission tower with unequal legs was taken as the research object. The histories of wind speed are simulated by adopting the harmony superposition method. The displacements of tower, the support reaction and the axial force of the tower are calculated...
The current-carrying capacity of overhead lines is dependent on weather conditions. Overhead lines can safely carry more than their rated capacity during periods of low ambient temperature or high wind speeds due to cooling effects. Dynamic line rating involves quantifying this additional capacity in real time as local weather conditions change. Increases in line rating due to high wind speeds are...
This paper describes the results of experiments made in the vicinity of EHV overhead lines to investigate sources of clouds of charged particles using simultaneously-recording arrays of electric field meters to measure direct electric fields produced under ion clouds. E-field measurements, made at one metre above ground level, are correlated with wind speed and direction, and with measurements from...
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