Power factor is the measure of how effectively the incoming power is used in an electrical system. A high power factor indicates that the power supplied to the electrical system is effectively used. A system with low power factor doesn’t effectively consume the incoming electric supply and results in losses. There is no power factor involved in DC circuits due to zero frequency. But, in AC circuits, the value of power factor always lies between -1 and 1.
Power factor is the ratio of true power (actual power consumed) to apparent power (total power delivered). In a Direct Current (DC) power system, the voltage is constant and the power factor is generally a non-issue. With Alternating Current (AC), there is an inherent drop in usable power that occurs due to the way AC works.
A power factor of 1.0 is considered ideal because it occurs when voltage and current are completely in sync. This is unlikely in an AC power system, so your power factor will be lower than 1.0. The lower it is, the more inefficient (wasteful) your power consumption.
To understand that with greater ease, the higher the kVar percentage in your load, the lower the ratio of the kW to the kVA. The result is a poor power factor. That’s where a kVAR unit comes in. It essentially reduces the reactive power that is supplied by the Utility. With the unit in place, you get to effectively use your electricity, reducing the amount of energy supplied to your system.
To reduce losses in the distribution system, and to reduce the electricity bill, power factor correction, usually in the form of capacitors, is added to neutralize as much of the magnetizing current as possible.
In recent years, with the development and maturity of SVG technology, Static Var Generator has been more widely used. Based on the principle of voltage source inverter, YTPQC-SVG Static Var Generator uses insulated gate bipolar transistor (IGBT) to control the magnitude and phase of inverter AC voltage, so as to achieve the purpose of reactive power compensation and 3 phase load balancing . Because the switching frequency of IGBT is very high (up to 25.6kHz), SVG can compensate rapid reactive loads and achieve quite high compensation accuracy. SVG is the best product in the field of reactive power control.
YTPQC-SVG Static Var Generator detects load current in real time through internal and external CT and analyzes the reactive current of load by TI DSP and FPGA, then generates PWM signal to IGBT inverter(3 Level) to generate inductive or capacitive current and compensate reactive current to realize the target power factor. YTPQC SVG can also compensate phase imbalance.
Compared with the traditional capacitor bank, YTPQC-SVG has the advantages of fast response and high compensation accuracy without under-compensation or over-compensation problems, avoid resonance,etc.
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