Software Electrical lines design
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LINEPAR:
Calculation parameters program of EAT and AT lines with single or bundle conductors. Determines the impedance and admittance matrices for: system physical conductors, phase conductors equivalent and symmetrical components for studies of gradients, corona loss and radio interference. Provides the values of admittance and impedance of direct sequence and zero lines for successive AT and EAT for ground resistivities given as data. For parallel circuits performances in double or triple triad, also gives the corresponding mutual. Supports any configuration and any provision of wires to a maximum of 28 drivers included cable guard.
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CORONA:
From the electrostatic parameter matrices given by LINEPAR, estimated surface gradients in wire and cable guard. Gives the values of average gradient phase, the individual maximum SUB used for calculations of radio interference profile and gradients for SUB in the direction of soil that are used to calculate the corona loss in bad weather. The latter calculated in kW / km for three levels of precipitation of rain or snow. Alert inadmissible values subconductores gradients and / or wire guard. Is applied to transmission lines with single wires or bars, and lying beam transformer stations.
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LINEGAP:
Program for determination of typical tower configuration supporting lines of EAT to meet preset performance compared to all solicitations defined by:
Switching surges, power frequency voltage with extreme winds, lightning overvoltages. LINEGAP required electrical distances calculated by the first two requests. It is complemented by the program that determines the behavior STROKE to overvoltages. LINEGAP is applicable to lines 330 to 800 kV. It follows the method of calculation and test results published in the "Transmission Line Reference Book 345 kV and Above," EPRI.
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STROKE:
Program for determining the electrical behavior of EAT lines against overvoltages. The calculation procedure conforms to the analytical method of "Transmission Line Reference Book 345 kV and Above," EPRI, Chapter 12. You can check the performance of existing designs or optimize new designs to satisfy a preset behavior. Determines the probability of "Shielding Failures" and "Backflashover" and the probability of short disconnection by 100 km / year. Allows sensitivity analysis to design factors: tower foot resistance, number of insulators per string, wire guard position, height of tower, etc..
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TERMO:
Program for calculating the thermal limit of conductors lying naked with or without sunlight or indoors in still air unrestricted, IEEE PAS-VOL 95/1976. Determines the current limit to avoid exceeding the maximum allowable temperature in the driver taking into account the geometry of the driver, generation of heat by Joule effect and dissipation by radiation and convection to the ambient conditions given. With sunlight, adds heat absorption by this effect because of the latitude and azimuth of the path.
