Essay On Power Factor
Power and energy are most valuable in the present technology driven world. Therefore Research must be carried out for finding out the causes of their wastage and loss. Then we should upgrade the power system so as to eliminate or at least minimize this loss. Due to the onset of industrial revolution the use of inductive loads have increased to a great extend. Moreover in the present world which is dominated by semiconductors the use of nonlinear semiconductors in industries and everyday life has increased manifolds. These nonlinear semiconductor and inductive loads makes the system power factor poor and cause huge losses and decrease efficiency of the power system. Therefore it is very important to have knowledge about the basics of power factor. …show more content…
Definition no.3: Power factor can also be defined as the cosine of the load angle. Load angle is defined as the tangent inverse of the ratio of the reactive part to resistive part of the load. II. CAUSES OF LOW POWER FACTOR 1. All the inductive loads such as single phase and three phase induction motors. 2. Fluctuating Load in Power System: Load on a power system varies. At low loads, the supply voltage is rises that increases the magnetizing current and lead to decreased power factor. 3. Industrial heating furnaces cause a low power factor. 4. High intensity discharge lighting or Arc lamps have a very low operating power factor. 5. Harmonic Currents III.NEED FOR IMPROVEMENT OF POWER FACTOR 1) For decreasing our electrical energy bill: a. If system power factor is low more reactive power (KVAR) is required which results into higher requirement of apparent power (KVA) that is what the electrical energy provider is supplying. Therefore, a system’s low power factor forces the energy provider to expand its generation and transmission capacity to handle this increased demand. If the system power factor is high, less reactive power (KVAR) is required which results into lower requirement of apparent power (KVA), which equates to savings for the energy
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