Power factor correction and harmonic filterin
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چکیده
Reactive energy and power factor L2 1.1 The nature of reactive energy L2 1.2 Equipment and appliances requiring reactive energy L2 1.3 The power factor L3 1.4 Practical values of power factor L4 Why to improve the power factor? L5 2.1 Reduction in the cost of electricity L5 2.2 Technical/economic optimization L5 How to improve the power factor? L7 3.1 Theoretical principles L7 3.2 By using what equipment? L7 3.3 The choice between a fixed or automatically-regulated bank L9 of capacitors Where to install power factor correction capacitors? L 0 4.1 Global compensation L10 4.2 Compensation by sector L10 4.3 Individual compensation L11 How to decide the optimum level of compensation? L 2 5.1 General method L12 5.2 Simplified method L12 5.3 Method based on the avoidance of tariff penalties L14 5.4 Method based on reduction of declared maximum apparent power (kVA) L14 Compensation at the terminals of a transformer L 5 6.1 Compensation to increase the available active power output L15 6.2 Compensation of reactive energy absorbed by the transformer L16 Power factor correction of induction motors L 8 7.1 Connection of a capacitor bank and protection settings L18 7.2 How self-excitation of an induction motor can be avoided L19 Example of an installation before and L20 after power-factor correction
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