Unit Per Unit (pu)

In the analysis of the electrical network system of values bathroom space saver that must be calculated is quite large if still using the units as above. Thus allowing the occurrence of difficulties or errors in the calculation. Therefore we need a method to overcome these problems. There are two methods that can be used to overcome bathroom space saver this problem is to use percentages and units per unit. Both the calculation method, either by percentage or by a unit per unit, much simpler than using directly the values bathroom space saver of amperes, bathroom space saver ohms, and volts truth. bathroom space saver Methods per unit have little excess of the percentage method, because the product of the two quantities (two values) are expressed in per unit has been directly obtained bathroom space saver in per unit as well, while the product of the two quantities are expressed in percentage remains to be divided by 100 to get results in percentage. bathroom space saver
Definition of units per unit for a quantity is the ratio of the quantity of the basic values expressed in decimal. Or in other words a unit per unit of scaling system in order to facilitate the calculation or computation process of analyzing an electrical grid system. Quantities bathroom space saver in units systems, respectively, the voltage in volts - current in amperes - impedance in ohms, is transformed into a dimensionless scale that per-unit (pu abbreviated). At first transformation into a per-unit is intended to simplify the calculation, but with the development of computer use had been less intent simplification means anymore. However, some of the advantages contained in units of per-unit still felt. Per-unit value of a quantity is the ratio of these quantities with a mass base. The amount of the base dimension equal to the dimension of the original scale so that the value of per-unit transforms into a dimensionless bathroom space saver
The real value may be in the form of complex numbers, but set the base value is a real number. Therefore, the phase angle in the per-unit value equal to the actual phase angle. bathroom space saver As an example we take the complex power
Base value of S is freely chosen and are usually chosen such numbers that accommodates tens, hundreds and thousands. If S base has been determined we have to choose one base or first base V to be determined freely, but not both can be chosen freely. If we calculate the S pu of the above equation we get
Unit Per Unit (pu)