The Reactive Power, Does It Important For Us

[Mayalin22]

http://faculty.kfupm.edu.sa/EE/mshwehdi/Yasre%20.doc

[robbietan]

this paper is full of errors, to wit:

1) Reactive power is returned to the electric grid as the windings de-energize - the author obviously doesnt know the subject being discussed

2) When reactive power supply lower voltage, as voltage drops current must increase to maintain power supplied, causing system to consume more reactive power and the voltage drops further again, the author doesnt know the subject.

3) If voltage reduction continues, these will cause additional elements to trip, leading further reduction in voltage and loss of the load. same as (1)

masyado pang maraming errors which makes this document not worth reading

[glutnix_neo]

this paper is full of errors, to wit:

1) Reactive power is returned to the electric grid as the windings de-energize - the author obviously doesnt know the subject being discussed

2) When reactive power supply lower voltage, as voltage drops current must increase to maintain power supplied, causing system to consume more reactive power and the voltage drops further again, the author doesnt know the subject.

3) If voltage reduction continues, these will cause additional elements to trip, leading further reduction in voltage and loss of the load. same as (1)

masyado pang maraming errors which makes this document not worth reading

ako author neto ,











joke, hehehehe. kakatamad magbasa, mamaya basahin ko para mapagaralan din.

[Mayalin22]

this paper is full of errors, to wit:

1) Reactive power is returned to the electric grid as the windings de-energize - the author obviously doesnt know the subject being discussed

2) When reactive power supply lower voltage, as voltage drops current must increase to maintain power supplied, causing system to consume more reactive power and the voltage drops further again, the author doesnt know the subject.

3) If voltage reduction continues, these will cause additional elements to trip, leading further reduction in voltage and loss of the load. same as (1)

masyado pang maraming errors which makes this document not worth reading

sir meron po ba kayong link na tama...   or meron kayong mas magandang detailed na explanation?

[danny]

ako author neto ,










joke, hehehehe. kakatamad magbasa, mamaya basahin ko para mapagaralan din.

bwahahahahaha

[maldihtah13]

he he he

[subzer0]

di ba yung reactive power yun ba yung useless power?di talaga magagamit ito dahil wala syang use,better to concentrate na lang yung author sa nearly unity power factor.sana ganito nalang ginawa nyang study:

1. ano ang power factor?
2. ano ang advantages ng mataas na power factor at paano maachieve ito?
3. mga technique to correct power factor.
4. bakit sa industrial power systems kailangan ng power factor.
5. bakit sa residential di tayo sinisingil sa apparent power(true or active power lang tayo sinisingil) at sa industrial lang nakaimplement?

[subzer0]

haay di ko parin maintindihan itong power factor kahit ngayon,saka bakit kailangang i correct? baka masilip ako ng nga masters dito  

[glutnix_neo]

sir meron po ba kayong link na tama...  or meron kayong mas magandang detailed na explanation?

agree master, ano po basis nyo bakit nyo nasabi na mali yun? yung number 1 agree ako at some point babalik talaga sa main yun at maari ding madissipate ng circuit na paggagamitan yung power, the rest eh medyo nalilito rin ako sa gusto sabihin ng author pero maaring tama pa rin sya.

[glutnix_neo]

on the second thought parang may mali nga sa item 2 at 3, basahin ko muna yung paper,hehehe

[subzer0]

tama po yun bumabalik lang sa system yung reactive power kasi di sya na didissipate dahil useless sya,di sya maaabsorb ng load.umiikot lang sya sa system.

[Mayalin22]

kung ganon mali pala yun nag-seminar sa amin 

King Fahd University of Petroleum and Minerals.

Dr. Yasre Ahmed Bin Abdul Aziz Ph.D. Degree in Electrical Engineering (EE) from University of Central Florida   

[marcelino]

kung ganon mali pala yun nag-seminar sa amin 

King Fahd University of Petroleum and Minerals.

Dr. Yasre Ahmed Bin Abdul Aziz Ph.D. Degree in Electrical Engineering (EE) from University of Central Florida   

hala...

hehehehe

[subzer0]

kung ganon mali pala yun nag-seminar sa amin 

King Fahd University of Petroleum and Minerals.

Dr. Yasre Ahmed Bin Abdul Aziz Ph.D. Degree in Electrical Engineering (EE) from University of Central Florida   

may point din naman yung sinasabi ng author kaya lang we need to verify muna kasi mahirap din maniwala agad agad 
napansin ko lang kasi sa mga power transformer,rating nya lagi nasa apparent 
power(kVA) saka yung capacitor banks naman nasa reactive power(KVAR) naman yung ratings,baka sa stress may effect yung reactive power kaya importante yung reactive power.

[glutnix_neo]

may point din naman yung sinasabi ng author kaya lang we need to verify muna kasi mahirap din maniwala agad agad 
napansin ko lang kasi sa mga power transformer,rating nya lagi nasa apparent 
power(kVA) saka yung capacitor banks naman nasa reactive power(KVAR) naman yung ratings,baka sa stress may effect yung reactive power kaya importante yung reactive power.

Yup I got the point nung author, regarding sa pagtaas ng current pag bumababa voltage para mamaintain current(item#2).

Bakit nyo po nasabi na mali yun?

[kinyo]

medyo nakakalito lang basahin yung paper kasi ...

hindi english ang native language nung author!

sa title pa lang ng paper halata na eh

 

[e.novacek]

i can't say that the author doesn't know the subject being discussed.. the author is a "full professor", having a Masters and Ph.D degree from a reputable school and his researches extends from electrical power, transmission line and transients.. and the author is experienced..

i wonder why the author didn't mentioned the references.. but i guess, the paper is not a "research paper", on reading his paper.. it's an informal discussion in one particular subject..

however, the author is not citing that the reactive power is not important as "opposed" to the title.. upon my understanding his paper, he's even promoting more on reactive power..

reactive power is one of the important issue for AC phenomena and power calculations for motors, generators and transmission and power lines in measuring the amount of energy going back to the source..

[robbietan]

1) Reactive power is returned to the electric grid as the windings de-energize - generators provide power in kVA. it is composed of true (kW) and reactive (kVAR). if energy is used by a load, (say a motor) no energy is returned to the grid.

2) When reactive power supply lower voltage, as voltage drops current must increase to maintain power supplied, causing system to consume more reactive power and the voltage drops further   a constand load motor (for example) will draw more current if the load being supplied to it is lower than its rated voltage. lowering the supplied voltage does not in any way cause a motor to consume more kVAR or kW.

3) If voltage reduction continues, these will cause additional elements to trip, leading further reduction in voltage and loss of the load. power grids reduce voltage in times when demand is greater than the load. a voltage drop of around 5% is common practice - that is called a "brown out". generators trip when the load is greater than their rated capacity so as to protect their generators from overspeeding.

[robbietan]

di ba yung reactive power yun ba yung useless power?di talaga magagamit ito dahil wala syang use,better to concentrate na lang yung author sa nearly unity power factor.sana ganito nalang ginawa nyang study:

1. ano ang power factor? - power factor is just the ratio between real power (W) and true power (VA)

2. ano ang advantages ng mataas na power factor at paano maachieve ito? - if a load has a high pf, there is less need for generators to produce them.

3. mga technique to correct power factor. - adding capacitors to inductive loads (like motors) will reduce the VAR needs of the motor and increase the overall pf of a place. placing capacitors on the main circuit will increase the overall pf of that place

4. bakit sa industrial power systems kailangan ng power factor. - industrial facilities tend to have a lot of motors which consume a lot of VARs. in residential places, the total var consumption is small and being taken care of by the utility. which is why industrial places have meters for VARs while residential places only have meters for W

5. bakit sa residential di tayo sinisingil sa apparent power(true or active power lang tayo sinisingil) at sa industrial lang nakaimplement?

[♪ ♫ ♫ ♪ ♪ ♪ ♫ ♫ ♫]

as per experience ko lang ito ha,

Importante at walang problema ang reactive components sa DC systems, pero sa AC systems nakow! they are spending millions of dollars just to eliminate or neutralize it.

teka, ano bang laman nong sulat?! hindi ko maintindihan e!