Power Factor Correction
As stated above, to minimise I2R losses in AC networks, it may be necessary to manipulate the power factor. This can be attained by connecting purely reactive impedance, Z' in parallel with the load impedance as shown in the Figure drawn below.
Figure--Power factor correction by introducing a pure reactance in the parallel with load m impedance.
By doing so, the phase angle among line voltage and line current can be adjusted whereas the power consumption remains the same as a pure reactance does not dissipate any power.
A carefully chosen reactance will decrease φ and therefore increases the power factor which in turn reduces line current.
Example
Given that RMS line voltage and line current are
A respectively, determine impedance which will result in the unity power factor.
Taking voltage as reference phasor, the phase angle among line voltage and line current can be given as-36.90
![89_Power Factor Correction9.png](https://www.expertsmind.com/CMSImages/89_Power%20Factor%20Correction9.png)
To improve the power factor, an impedance is inserted in the parallel with load as in the Figure drawn below resulting in following nodal equation
It is clear that for unity power factor, the imaginary component of the line current must be zero. This is accomplished by assigning a current of j 30 A through the pure reactance resulting in following line current
Thus I'j 30A and the magnitude of impedance required can be calculated as follows
The power consumed by load remains the same that is
Thus to achieve unity power factor, a pure reactance of -j 3.33Ω is connected in parallel with the load. The vector diagram of the above example is shown in Figure drawn below.
Figure --Vector diagram to illustrate the power factor correction.
Email based Power Factor Correction assignment help - Power Factor Correction homework help at Expertsmind
Are you finding answers for Power Factor Correction based questions? Ask Power Factor Correction questions and get answers from qualified and experienced Circuit Theory tutors anytime from anywhere 24x7. We at www.expertsmind.com offer Power Factor Correction assignment help -Power Factor Correction homework help and Circuit Theory problem's solution with step by step procedure.
Why Expertsmind for Circuit Theory assignment help service
1. higher degree holder and experienced tutors
2. Punctuality and responsibility of work
3. Quality solution with 100% plagiarism free answers
4. On Time Delivery
5. Privacy of information and details
6. Excellence in solving Circuit Theory queries in excels and word format.
7. Best tutoring assistance 24x7 hours