Concept of reactive power pdf

Reactive power is the part of complex power that corresponds to storage and retrieval of. Budeanus concept of reactive and distortion power for systems operating under nonsinusoidal conditions has been subject to criticism throughout the past decades, which finally led to its. Meaning, pronunciation, translations and examples log in dictionary. Reactive power only pulsates back and forth in the circuit. What is active, reactive, apparent and complex power. Initially, single phase socalled two wire circuits are discussed as to. Using an analogy to a municipal water system, think of voltage as equivalent to water system pressure without it water just sits in the pipes and, with too much, pipes explode. Pdf budeanus concept of reactive and distortion power. This phantom power is called reactive power, and it is measured in a unit called voltampsreactive var, rather than watts. Pdf budeanus reactive power and related concepts revisited. Concepts of reactive power control and voltage stability methods in power system network. L v nagarajan it was very interesting to read a paper by r.

Reactive power is critical to maintaining voltage levels on the transmission system. In a direct current dc circuit, or in an alternating current ac circuit whose impedance is a pure resistance, the voltage and current are in phase, and the following formula holds. It is shown that there exists a close relationship between the definitions proposed by budeanu, tenti, and kusters and moore. Pdf optimal reactive power dispatch using the concept of. Petroianu of university of cape town, on the above subject. Reactive power definition and meaning collins english. The intent of this paper is to present an analysis of reactive power control and voltage stability in power systems. Thus the power system supplies power to a vast number of loads and is feeding from many generating units, there is a problem of maintaining voltages within required limits.

It is required to build up magnetic field in the air gap of machine. In this chapter the meaning of real and reactive power are explored for sinusoidal systems. Reactive power is both obscure for nonengineers and important in the design of electricity systems, especially at the distribution level. Active power is the real power consumed in an electrical circuit. A new result is derived associated with the wellknown budeanu reactive power concept. Pdf concepts of reactive power control and voltage. Pdf concepts of reactive power control and voltage stability. Pdf reactive power compensation and voltage control. Reactive power is an odd topic in ac alternating current power systems, and its usually explained with vector mathematics or phaseshift sinewave graphs. Fundamental concepts of reactive compensation hvdc. 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.

Reactive current impacts equipment ratings directly impacts the ability of the network to transport energy loads with rapid changing real or reactive power demand create voltage flicker 9 possible applications mid line compensation increase power transfer by supplyingsinking. Recently, some new results are presented that shed a different light on budeanus reactive power and its compensation. This paper deals with the concepts of reactive power and reactive current in a nonsinusoidal periodic situation. Pdf this paper deals with the concepts of reactive power and reactive current in a nonsinusoidal periodic situation.

The power factor desired is defined by the operating techni cian. Index termscompensation, nonsinusoidal situation, power theory. Reactive power is the resultant power in watts of an ac circuit when the current waveform is out of phase with the waveform of the voltage, usually by 90 degrees if the load is purely reactive, and is the result of either capacitive or inductive loads. Budeanus concept of reactive and distortion power for systems operating under nonsinusoidal conditions has been subject to criticism throughout the past decades, which finally led to its removal from the latest standards. Understand the concept of reactive power explain the voltage regulation in transmission lines explain the compensation theory and different. Principles for efficient and reliable reactive power supply and consumption. It may also be expressed as svi where i is the conjugate of the complex current i.

Physical significance of active, reactive and apparent power with their derivation is discussed below. While understanding reactive power requires knowledge of integral calculus, the basic intuitions can be understood without rigorous mathematical study. As load varies, the reactive power requirements of the transmission system vary. Reactive power is a quantity that is normally only defined for alternating current ac electrical systems. Reactive power supply from generation sources is the provision of reactive capacity, reactive energy, and responsiveness from ios resources, available to control voltages and support operation of the bulk. Active, reactive and apparent power electrical concepts.