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  • in reply to: AC Power (back to basics) #13017

    Sir Georges,


    Let talk about power generation,

    I had done some visit to Power Generation Control Room during my university year. I donno if this is concept is wrong or correct. The Technician said that, the generator produce active and reactive power. But, production of reactive power is limited to provide extra life span to the generator. In addition, he said that, therefore on the transmission line system, utility company design reactor to supply reactive power into the transmission line to recap the usage of reactive power in the transmission and improve power quality in term of power correction.


    Hi Andery,


    My opinion are :


    1. How much your project budget? Which is more cheaper, the cooper or the aluminium.

    2. How long will be the distribution length for the power cable to serve the load. How much the voltage drop you have calculated as for cooper and the aluminium?

    3. If the voltage drop that you have considered into account and the project budget you may have the guideline which one to choose. As we know aluminium is considered cheaper than cooper, but in term of voltage drop and induced current, cooper conductor is more preferred. 

    4. How you install underground cable. Basically, underground cable is installed by common method used in worldwide. The parameter such as the deep of the trench, protective slab, maybe different. 

    in reply to: AC Power (back to basics) #13134

    @Spir Georges GHALI said:
    Dear Mr. Mill ;

    As I remember, that I mentioned before in other Topic to the same remarks that are :

    1- The Reactive Energy doesn’t oscillate between “ Source & Load ” ( as mentioned in this Topic ).

    2- The reactive Energy is a “ Consumed Energy ” by the installed loads either Inductive or Capacitive, and for that the Utilities install the Reactive Energy Counters “ kVAR meters ”, because if it’s oscillate that means it doesn’t be consumed and no need for these counters.

    3- The Capacitors and Inductive Loads consume Reactive Energy, and they don’t store this energy and swinging back and forth between source and load ( as mentioned in this Topic ).

    4- The Transformers’ Power are rated in “ Apparent Power – kVA ” because we don’t know the type of loads that will be supplied by them, as the Apparent power will be divided into “ Active Power  &  Reactive Power ” according to the “ Power Factor value ” of the supplied loads.

    I agree with your explanation.

    1. Reactive Power is indeed consume by inductive load and produced by Capacitive load. 

    2. Utility Company does install kVAR meter as in located in Industry Area, as they install / use a lot of inductive machinery.

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