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Electrical Technology, Volume 1 by S. P. Bali

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20

Power Factor Correction

OBJECTIVES

In this chapter you will learn about:

  • The need for power factor correction
  • Power factor correction
  • Active and reactive power
  • Types of compensation
  • Individual p.f. correction
  • Group p.f. correction
image

Bank of capacitors for p.f. correction

20.1  INTRODUCTION

If the load in an alternating-current circuit has only resistance, it will dissipate an active power P = VIa. If the load is a pure reactance, it will take a reactive power Q = VIr. Only rarely in practice are electrical devices pure resistances or pure reactances. Usually, they are a combination of both, and most often they consist of a resistance and ...

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