Harmonic Mitigation By Active harmonic Filter

 

Improve electric power quality and reduce energy losses due to Harmonics. Detailed studies were carried out and the effects of poor power quality specially harmonics were analyzed on the productivity and energy consumption. Harmonic current generated by nonlinear loads like motors driven by Variable Frequency Drives (VFD) cause power system heating and add to user power bills. The harmonic related losses are present in the power cables, bus bars linking the loads with source, the power transformer itself. A more serious effect of harmonic loads served by transformer is due to an increase in winding eddy current losses. The heat generated due to harmonics must be removed in order to save electrical energy, thus leading to savings in the utility bill. Acase study where a 2.0 MVAtransformer used for powering the plant. The current harmonics is recorded with & without using the Active harmonic filter (AHF). The power parameters are recorded on side of transformer to demonstrate how the active harmonic filter can reduce the effects of harmonics and save energy. 

Amtech Electronic provided Active Harmonic Filter Solution and Energy Saving in various Industries, as you can also see in the below given application case study.

Previous System :

• Plant was running with so many non linear loads like VFDs, UPS, Computers etc...
• No any Harmonic Mitigation solution installed in plant.
• Current Harmonics (THD-I) was observed around 24 - 25% at TR-4 incomer, which is much higher than the limit of 8.00% as per IEEE 519 – 1992 standards.
• Voltage Harmonics (THD-V) was observed around 2.2 – 2.5% at TR-4 incomer, which is well within the limit of 5.00% as per IEEE 519 – 1992 standards.
• PF Capacitors are not magnifying the Harmonics as they are detuned with 7.0 % series reactor.

Problems Observed :

• Capacitor over heating and failures.
• Cable heating which lead to insulation breakdown.
• Transformer heating, equipments heating, motor heating.
• Random fuse blowing, relay tripping, breaker tripping.
• Limits on generator & UPS capacity

Present System :

Axpert-i-sine Active Harmonic Filter of 100 AMP(3P3W, 415 Volts) installed at LTside of TR-4. 

Previous System (Without AHF) : 

Current Harmonics (THD-I) : 24 – 25 % and Voltage Harmonics (THD-V) : 7 – 8 %

Present System (With AHF) :

        Current Harmonics (THD-I) : 2.0 – 2.5 %  and Voltage Harmonics (THD-V) : 1.5 – 2.0 %

Merits of New System :

• Capacitor over heating and failures avoided.
• Random Fuse blowing, relay tripping, breaker tripping avoided.
• Transformer heating, equipment heating, cable heating avoided.
• Contactor burnt out avoided.

Other benefits (Savings) include :

• Reduced energy usage (kWH) and reduction in demand (kVA).
• Reactive power (kVAR) and Apparent power (kVA) saving.
• Improved PF and voltage quality.
• Reduction in I2R losses in conductor.
• Reduction in equipments losses (motors, transformers etc..)
• Electrical equipment life and performance increased.
• Protection of sensitive electronic equipments
• Operating cost reduction.
• Reduced maintenance, decrease consumption of spare parts.
• Better capacity utilization of transformers and generators.

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 info@amtechelectronics.com

NextGen Total Motor Control Solution (include Advanced Control Functions).

World’s Most Advanced VFD User Friendly By Design (include Advanced Generation Control Functions).

400 V System (380 to 480 V),
0.75 kW (1 HP) to 2000 kW (2700 HP)

500 V System (500 to 600 V),
30 kW (40 HP) to 1800 kW (2415 HP)
600 V System (601 to 690 V),
37 kW (50 HP) to 2100 kW (2815 HP)

Amtech Offers Total Motor Control like AC Drives (also known as variable frequency drives or VFD), High Frequency Drives, Medium Voltage Drives (MVD), Soft Starters, Engineered System Solution, Battary Backup System Solution.

Amtech, we have a proven expertise in customised motor control. Since 1987, we have designed and manufactured the highest and most accurate motion control solutions for an array of industries around the world.

Our customised Variable Frequency Drives (also known as AC Drives) and motor control products provide critical performance for today’s demanding applications in markets requiring high precision and high throughput motor control solutions.

We, with our engineered systems, offer our clients a full range of services tailored to their specific needs. Right from replacing a system component, to dedicating a complete team of Amtech professionals to implement projects of varying scales, we do it all.

Reliable Drives

Since inception, Amtech has been working with the energy sectors. Our well-built, user-friendly Variable Frequency Drives ensure efficient and reliable functioning of your pumps, fans/blowers and cranes. They not only save energy, maintenance and downtime costs but also provide precise control over the process.

Minimise wear & tear and save energy

Accurate speed control of our VFDs maximise output of your pump and fan systems and reduce mechanical wear & tear, vibrations and leakages. Each of your  peration is continuously modified to demand, maintaining the required pressure as per the flow or the volume to be handled. Further, a sleep mode function in our VFDs saves energy by stopping the motor when it is not required to run.

Optimise cost

Smooth start reduces rush currents and mechanical or hydraulic stress in pipes and gaskets. Linear stops eliminate the risk of water hammer in your pumps, without the need for costly motor-controlled valves to reduce pressure spikes. Starting a fan that is rotating in the reverse direction is handled safely with a speed search function securing the correct direction and function before full speed operation.

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