Ac POWER ANALYSIS Part III.
9.6. COMPLEX POWER Considerable effort has been expended over the years to express power relations as simply as possible. Power engineers have coined the term of complex power, which they use to find the total effect of parallel loads. Complex power is important in power analysis because it contains all the information pertaining to the power absorbed by given load. The complex power S absorbed by the ac load is product of the voltage and the complex conjugate of current,
9.6. COMPLEX POWER
9.6. COMPLEX POWER
9.6. COMPLEX POWER Notice that; İşe yaramayan ancak kaynaktan çekilen kör güçtür Diğer bir ifadeyle, endüktif yüklü devrelerde, manyetik devrenin uyartımı için gereken güçtür .Bu güç endüktif yük üzerinde harcanmaz, sadece depo edilir ve tekrar kaynağa gönderilir Dolayısıyla, kaynakla endüktif yük arasında sürekli olarak reaktif güç alışverişi yapılır Bu durum ise, sistemdeki iletkenlerden geçen akımın artmasına sebep olur.
9.6. COMPLEX POWER
9.6. COMPLEX POWER
Example 4.11. Solution:
Example 4.11.
Example 4.11.
Example 4.12. Solution:
Example 4.12.
Example 4.12.
9.7. CONVERSATION OF AC POWER Conservation : Korunması-saklanması
9.7. CONVERSATION OF AC POWER
Example 4.13. Figure shows a load being fed by a voltage source through a transmission line. The impedance of the line is presented by the ((4+𝑗2)Ω impedance and the return path. Find the real power and reactive power absorbed by: (a) the source, (b) the line, and (c) the load. Solution:
9.8. POWER FACTOR CORRECTION
9.8. POWER FACTOR CORRECTION
9.8. POWER FACTOR CORRECTION İf we desire to increase the power factor from cos 𝜃 1 to cos 𝜃 2 without altering the real power, then the new reactive power is; The reduction in reactive power is caused by the shunt capacitor;
9.8. POWER FACTOR CORRECTION
Example 4.14. Solution:
Example 4.14.