Electric Fenomenas

Speaking of the power frequency can not be separated from the analysis of power plant / generator, because the source of it. For high non-electrical ideology that still lack what frequency it I try to love the picture here.

Actual frequency is characteristic of the resultant voltage by the generator. So when it says 50 hz frequency, mean voltage of a generator resultant change in value over time, its value is changed repeatedly as many as 50 cycles per second. so the voltage from zero to a maximum value of (+) and then zero again and then to the maximum value but its direction turning (-) and then zero again, etc. (if represented by a graph would form a sinusoidal wave) and this happens once in a fast-time, 50 cycle in one second. So if we look at electrical loads such as lights, in fact has been repeatedly lost its voltage (aka zero) but because it occurred within a very fast then the lights are still alive.

So if we observe this phenomenon and try to experiment, let's create that if the frequency is low, we take such a conservative who hz, what happens then every one second voltage will be lost and then the light will appear to the death over and over again like a lamp flip-flop (see animation on the right).
From the above analysis we can pull the conclusion that the electrical load required for stability on high frequency voltage to be completely smooth (do not feel life and death). Well now the question arises why 50 hz or 60 hz why not made it on high all 100 hz or 1000 hz'll really smooth. to understand this we have had to trace analysis down to the generator. Yg yg-frequency voltage is also called alternating voltage (alternating current) or VAC, frequency is proportional to the rotation generator. In the formula N = 120f / PN = rotation (rpm)f = frequency (hz)P = number of pole pairs of the generator, generally P = 2
By using the above formula, to produce a frequency of 50 hz then the generator must be rotated with the rotation N = 3000 rpm, and to produce a frequency of 60 hz then the generator need to be rotated by rotation 3600 rpm, so the faster we play the greater frequency generator. Well then what's the problem? why do not we just turn the generator with a super fast lap I'll produce a big frequency so that the voltage benar2 smooth. If we want to play then we need a turbine generator, the higher the rotation we want then the greater the power turbines it needs, and then the greater the energy required to rotate the turbine. If the energy source of steam then steam it needs more and multiply, and the greater the amount of fuel required, and so on and so on.
The generator and turbine manufacturer certainly has limitations and certainly after the producers experimented for decades with regard to all the technical angle there was made a standard yangg 50 hz and 60 hz it, which of course was considered quite effective for load stability and efficient in terms of technical and economical. Europeans and Americans use 50 hz using 60 hz. After standardization, all electrical equipment is designed to follow this provision. So logically if the 50 hz or 60 hz only been able to make the invisible light blinking to let alone made a higher frequency that will require a super-fast turbine and energy resources more efficiently so it does not.
Both voltage and frequency of the generator is subject to change based on the magnitude range from zero load to full load. often we meet the specifications mentioned plus minus 10% voltage and frequency plus or minus 5%. This means that the system supplies electricity / generator should be in the design at full load voltage drop does not exceed 10% and at zero load voltage does not rise above 10%, as well as frequency.