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Power sharing between two areas occurs through these tie-lines. Load frequency control, as the name signifies, regulates the power flow between different areas while holding the frequency constant.
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What is the need of under frequency relay in load shedding on power system?
when the load on a certain system increases the frequency of the system falls normally. It is dangerous to operate the equipments when the frequency is lower than the normal rated frequency so shed the when the frequency falls under voltage relays are used. I hope i answered your question :)
What is output frequency sync to mains?
this always used in inverters and UPS As in standby UPS And line interactive UPS ,the output frequency must be always track the input frequency as it supply the load from utility in standby mode, for any change that will affect the load . as example the frequency of the utility was with permitted values say 58Hz and suddenly the main power cutout, so UPS must be on same frequency so when convert to backup stored power mode ,the load doesn't affected and power continue to supply the load from the batterys through inverter , so output frequency must be always synchronized to utility frequency (mains) in case of any fault happened, hope i answered your question. Sherif Salah R & D Engineer at Arrow Electronics Egypt
Is a relay considered a load?
The relay's coil(s) would be a load, but the main function of a relay is to act as a switch to control power to a larger load.
In a 3-phase high voltage star-star connection 140KVA transformer and load phase voltage is 115v and frequency is 400hz what is the total load current?
Maximum load current on a 140KVA, three phase transformer when the output voltage is 115 v phase to phase is: 140kva / sqrt (3) / 115 = 703 Amps. frequency does not matter here.
How do you test generator reverse power?
To test the generators reverse power relay to make sure the generator is spinning at the right speed and a fuel issue is not involved. If it is not a fuel issue you need to check the frequency of the electronic load and frequency. If both of these issues are okay check the diesel electronic control unit for dirt and dust. This unit needs to be clean.
What happen to the frequency if the electrical line has a load?
Frequency is set by the supply, not by the load.
Define the terms logging interval dedicated control system and Frequency of Sampling?
what do you mean by terms under damped, critical damped and over damped frequency of control system?
Why power generated with under frequency is harmful to the load?
Why power generated with under frequency is harmful to the load?Read more: Why_power_generated_with_under_frequency_is_harmful_to_the_load
What is a Frequency Scintillation?
Abrupt changes in the frequency cause mostly by abrupt variation in load is frequency scintillation.
Why is necessary to control over speed in a motor?
over speed control is recommended for all prime mover driven generator to prevent over frequency operation of load connected to a system supplied by the generator and also to prevent possible over frequency operation of the generator itself from Ac system.
What is traffic load sector?
ofdma frequency range
What is lumped load?
A static load is a constant steady load.Think of a floor, if you stand on it without moving that is a static load. lump load A lumped network is usually a simplification of a distributed network, such as a transmission line. A transmission line has built in resistance, inductance
What does frequency control in light?
Frequency controls the color of the light.
What is the need of under frequency relay in load shedding on power system?
when the load on a certain system increases the frequency of the system falls normally. It is dangerous to operate the equipments when the frequency is lower than the normal rated frequency so shed the when the frequency falls under voltage relays are used. I hope i answered your question :)
What does the term 'RIT' mean in HAM radio?
Receiver incremental tuning (RIT)--A transceiver control that allows for a slight change in the receiver frequency without changing the transmitter frequency. Some manufacturers call this a clarifier (CLAM) control.
How do you reduce the speed of a 15 kW 3 phase motor without using variable speed control?
If the load is connected to the motor via belts, you can change the speed the load is turning by changing the pulley sizes. To get the load to slow down, increase the size of the pulley on the load; to get it to speed up, increase the size of the pulley on the motor. To reduce the speed of the motor itself, you'll have to alter the line frequency, which you can't do without a variable frequency drive attached to the motor.
How do you make a inverter?
Capacitors to store DC voltage, transistors to switch power to the AC load, plus control circuitry to time the switching to match the (assumed) 60Hz AC frequency.
