1 11/17/2015 Power Quality Correction. 2 11/17/2015 Power Quality Correction.

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Presentation transcript:

1 11/17/2015 Power Quality Correction

2 11/17/2015 Power Quality Correction

3 11/17/2015 Power Quality Correction What does ability mean? Ability is the rate of time for the transformation of energy into mechanical energy or light energy Ability is the rate of time for the transformation of energy into mechanical energy or light energy

4 11/17/2015 Power Quality Correction  Most plant loads are Inductive and require a magnetic field to operate: Motors Motors Transformers Transformers Florescent lighting Florescent lighting  The magnetic field is necessary.  The utility must supply the power to produce the magnetic field and the power to produce the useful work.  These two types of current are the ACTIVE and REACTIVE components ACTIVE & REACTIVE POWERS

5 11/17/2015 Power Quality Correction Power Factor Fundamentals

6 Power Factor Fundamental Definitions: –Working /Active Power: Normally measured in kilowatts (kW). It does the "work" for the system--providing the motion, torque, heat, or whatever else is required. –Reactive Power: Normally measured in kilovolt-amperes-reactive (kVAR), doesn't do useful "work." It simply sustains the electromagnetic field. –Apparent Power: Normally measured in kilovolt-amperes (kVA). Working Power and Reactive Power together make up apparent power.

7 Power Factor: A measure of efficiency. The ratio of Active Power (output) to Total Power (input) A power factor reading close to 1.0 means that electrical power is being utilized effectively, while a low power factor indicates poor utilization of electrical power. Total Power (kVA)  Active Power (kW) Power Factor= Active (Real) Power Total Power =kW kVA =Cosine ( θ ) = DISPLACEMENT POWER FACTOR Reactive Power (KVAR) Power Factor Fundamental

8 11/17/2015 Power Quality Correction In this example, demand was reduced to 8250 kVA from kVA. In this example, demand was reduced to 8250 kVA from kVA. 1750KVA Transformer Capacity Release. 1750KVA Transformer Capacity Release. The power factor was improved from 80% to 97% The power factor was improved from 80% to 97% BeforeAfter Why do we install Capacitors?