By Ramasamy Natarajan
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Extra resources for Computer-aided power system analysis
The sheaths are solidly grounded at both ends of the cable. 10 inch thick lead sheath. The resistance of the conductor is 23 (a-Ohm/feet and the resistance of the sheath is 142 u-Ohm/feet. The resistivity of earth is 100 Ohm-m. 85 inch. 445 inch. Also, calculate the positive and zero sequence impedances using the EMTP program. Compare the results. Calculate the charging capacitance values. The geometric mean distance between the conductors GMD is: Copyright 2002 by Marcel Dekker. All Rights Reserved.
Maximum reactive power in MVAR. Minimum reactive power in MVAR. U. U. Base MVA of the generator. Branch data - The branch data provide the line impedance and the line charging data. The data consist of the following: • • • • • • • • From bus number. To bus number. Branch identification number. U. on 100 MVA base. U. on 100 MVA base. U. on 100 MVA base. Line rating in MW. Line in or out identification code. Transformer data - The transformer impedance is expressed along with the branch data. However, the transformer tap changing data are expressed in this part as: Copyright 2002 by Marcel Dekker.
Where the constants A through F are defined based on the nature of the load (such as residential, industrial or agricultural). Generator data - Through the generator data, the machine power capabilities are expressed along with the MVA base. The arrangement of data is as follows: • • • • • • • • • • Bus number. Generator number. Generator power in MW. Maximum power of the generator in MW. Generator reactive power in MVAR. Maximum reactive power in MVAR. Minimum reactive power in MVAR. U. U. Base MVA of the generator.