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'Active power' describes the rate at which energy is dissipated by a circuit through heat transfer, or (e.g. in the case of a motor) provides useful work. 'Reactive power' describes the rate at which energy is alternately stored within an electric or magnetic field and, then, returned to the supply every quarter-cycle.
What else can I help you with?
Relation between active power plus reactive power plus apparent power?
Apparent Power=Active Power+Reactive Power or Active Power=VI Cos(Phase Angle) Reactive Power=VI Sin(Phase Angle) Apparent Power= VI
Is there any active or reactive power in dc current?
Active, yes; reactive, no.
Why wattmeter measure the reactive power?
A watt meter will measure active power, not reactive power.
Why does a ceiling fan utilize reactive power while all the electrical appliances use active power?
Reactive power is power that flows back and forth between the inductive windings of the motor in the fan. If an appliance doesn't have a motor then the power it uses could be classified as Active in that it provides a load to the power company generator.
What is the importance of reactive power in transmission lines?
Reactive power is the electrical power that oscillate between the magnetic field of an inductor and the electric filed of the capacitor. Reactive Power Cannot Converts to non-electrical power e.g. heat, light & torque. Instantaneous reactive power equal to the multiplication instantaneous current, instantaneous voltage and the sinusoidal of phase difference of current & voltage. It only present in ac power if there is any phase difference between instantaneous current and instantaneous voltage. During complete cycle average reactive power is zero. Active power is the energy supplied to run a motor, heat a home, or illuminate an electric light bulb.Reactive power provides the important function of regulating voltage. If voltage on the system is not high enough, active power cannot be supplied. Reactive power is used to provide the voltage levels necessary for active power to do useful work. Reactive power is essential to move active power through the transmission and distribution system to the customer .Reactive power is required to maintain the voltage to deliver active power (watts) through transmision lines. When there is not enough reactive power, the voltage sags down and it is not possible to push the power demanded by loads through the lines.
What is the definition of active power?
'Active power' (also known as 'true power' and 'real power') is the rate of energy dissipation by the in-phase component of current in an AC circuit, expressed in watts.Active power is the vector-difference between apparent power (measured in volt amperes) and reactive power (measured in reactive volt amperes).Expressed in terms of apparent power: Active Power = Apparent Power x power factor = U I cos (phi)
Which line requires compensation?
Basically an AC transmission line require compensation in terms of reactive power. To push the active power across a transmission line certain amount of reactive power is necessary. In AC transmission line reactive power is generated and consumed. Generator is responsible for the production of reactive and active power both. Than this reactive power is consumed by the load and transmission line. Additional reactive power s supplied by the capacitor. This extra power supplied by the capacitor is termed as reactive power compensation. Requirement of this reactive power is there because reactive power is necessary to maintain the voltage stability.
What will happen when different voltage droop generator synchronised?
They will run with different reactive power output, i.e. reactive load won't be equally shared between units.
How to increase load on a bus in power system.Does it means to increase the bus active power demand or reactive power demand or both?
You can increase load on a bus power system by increasing the bus active power demand ans reactive power demand.
What does active output mean?
Electricity has three terms. Active power - Watt. Apparent power VA, reactive power VAR. Watt is known as active output
How can convert active power to reactive power and apparent power too?
'Active' power describes the rate at which energy is delivered to a load and is permanently lost, and is expressed in watts. 'Reactive' power describes the rate at which energy is alternately stored within a magnetic or electric field and returned to the supply every quarter-cycle, and is expressed in reactive volt amperes.You cannot 'convert' one to the other.'Apparent' power is the vectorial sum of active power and reactive power, and is expressed in volt amperes.
Can reactive power measure by 2 wattmeter method?
Active volts amperes are measured by 2 wattmeter methods. A wattmeter will measure active power and not reactive power. Electrical engineering is a promising career for anyone who likes to generate power.
