In order to increase the efficiency of desired work inside the long tunnel drilling, rating of electrical drives at tunnel face has significantly increased. Due to the high rating concentration of electrical drives at tunnel face significant voltage must be required which is need of an hour to finish the work in given time interval and to avoid the various dangers. Therefore, planning of electrical power distribution is required and voltage drop across each electrical drives must be taken into account. While power planning drill machine, Armored Face Conveyors (AFC), Shearer, breaker, Stage loader, face lightning, etc. must be given due importance as starting power required to them is very high. Breakaway torque of the AFC is not maintained because of low power, so it is required to start constantly requiring high power as well as it will heat the environment, which is often hazardous. In order to provide the required power drop and reduce the dangers, some alternative methods must be used. In the present investigation voltage drop compensation technique is developed by providing with optimization of position of transformer. Even though the voltage drop cannot be maintained in such cases boosting transformer with the power thyristor with tap changing is used to control the power instead of tap changer mechanism. In order to operate the various drives in long drilling tunnel and finish the work in desired period one must know the various parameters involved in the system. On line parameter such as voltage, currents, temperature, etc. of electrical drives and environment are measured through PC using various sensors, the sensed data is compared with the standard data. The comparison will help to take necessary decision and helps to reduce the forth-coming dangers in the tunnel or electrical drives.

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Voltage Drop Parameter Estimation Voltage Compensation .