Difference Between Active Power And Reactive Power Pdf

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Difference Between Active & Reactive Power

Power is the combination of voltage and current in electrical circuits. The abbreviations AC and DC are often used in electrical power systems as alternating current and direct current respectively. Both are different types of current used for the transmission of electrical energy. Active power and reactive power are the two most common terms used to describe the energy flow in electrical power systems. Active power is the real power whereas reactive power is used for transmission of real power. This article highlights some key differences between the two.

Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Simultaneous active and reactive power control of single-phase grid connected battery storage system Abstract: This paper presents decoupled active and reactive power control technique between a battery bank and single-phase local electrical grid. The modeling and control of this scheme will provide required amount of active power into grid. Here, active power balance occurs between dc and ac side of inverter. Simultaneously reactive power requirements by the electrical grid can be maintained via suggested closed loop controlled operation.

Difference Between Active and Reactive Power

Many practical circuits contain a combination of resistive, inductive and capacitive elements. These elements cause the phase shift between the parameters of electrical supply such as voltage and current. Due to the behavior of voltage and currents, especially when subjected to these components, power quantity comes in different forms. In AC circuits, voltage and current amplitudes will change continuously over a time. Since the power is the voltage times the current, it will be maximized when currents and voltages are lined up with each other. This means that zero and maximum points on current and voltage waveforms occurs at the same time.

The most significant difference between the active and reactive power is that the active power is the actual power which is dissipated in the circuit. The other differences between the active and reactive power are explained below in the comparison chart. The right-angled triangle shown below shows the relation between the active, reactive and apparent power. Measures the power factor of the circuit. The power which is dissipated or do the useful work in the circuit is known as the active power. It is measured in watts or megawatts. The active power is denoted by the capital alphabet P.

The main difference between active and reactive power is that Active Power is actual or real power which is used in the circuit while Reactive power bounce back and forth between load and source which is theoretically useless. The following power triangle shows the relation between Active, Reactive and Apparent Power. These all powers only induced in AC circuits when current is leading or lagging behind the voltage i. The average value of active power can be calculated by the following formulas. The power which moves and back bounces back and forth between source and load in the circuit is known as Reactive Power.

True, Reactive, and Apparent Power

We know that reactive loads such as inductors and capacitors dissipate zero power, yet the fact that they drop voltage and draw current gives the deceptive impression that they actually do dissipate power. The actual amount of power being used, or dissipated, in a circuit is called true power , and it is measured in watts symbolized by the capital letter P, as always. There are several power equations relating the three types of power to resistance, reactance, and impedance all using scalar quantities :. True power, reactive power, and apparent power for a purely resistive load. True power, reactive power, and apparent power for a purely reactive load.

Instantaneous power in an electric circuit is the rate of flow of energy past a given point of the circuit. In alternating current circuits, energy storage elements such as inductors and capacitors may result in periodic reversals of the direction of energy flow. The portion of power that, averaged over a complete cycle of the AC waveform , results in net transfer of energy in one direction is known as active power more commonly called real power to avoid ambiguity especially in discussions of loads with non-sinusoidal currents. The portion of power due to stored energy, which returns to the source in each cycle, is known as instantaneous reactive power , and its amplitude is the absolute value of reactive power.

Active, Reactive and Apparent Power

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Difference Between Active and Reactive Power – Watts vs VA

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Difference Between Active and Reactive Power

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2 Response
  1. Isaac R.

    The required power supply is called the apparent power and is a complex value that can be expressed in a Pythagorean triangle relationship as indicated in the figure below.

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