Solutions
On a network polluted by harmonics, the addition of capacitors will amplify the harmonics. In this case, two problems must therefore be solved at the same time : energy compensation and harmonic interference. Our experts can audit your site to analyze its electrical network and its compensation and harmonic problems. We also provide full maintenance services for your existing equipment.
PRESENTATION OF THE REACTIVE ENERGY COMPENSATION
Any electrical machine using alternating current (motor, transformer, etc.) brings into play two forms of energy actin and reactive
The active energy consumed (kWh) results from the active power P (kW) of the receivers. It is fully transformed into mechanical power (work) and heat (losses).
Reactive energy consumed (kvar) is used to supply the magnetic circuits of electrical machines. It corresponds to the apparent power S (kVA) of the receivers, vector sum of P (kW) and Q (kvar).
However, motors, transformers, fluorescent tubes, etc., require reactive power. Consumed beyond a certain threshold, he latter leads to financial penalties when invoiced by STEG.
The installation of capacitor banks allows to:
Reduce the demand in kVA
Eliminate voltage drops
Avoid penalties when invoicing
Increased system power
Have bonuses when invoicing
Improve the efficiency and quality of energy
Less heating of the HV/LV transformer
Automatic and sustainable reduction of energy consumption
Have bonuses when invoicing
Optimization of equipment life (machine tools, etc.)
Less CO₂ rejection (up to 95 kg for each kvar of power factor installed).
The installation of capacitor banks allows to :
- Reduce the demand in kVA
- Eliminate voltage drops
- Avoid penalties when invoicing
- Increased system power
- Get bonuses when invoicing
- Improve the efficiency and quality of energy
- Less heating of the HV/LV transformer
- Automatic and sustainable reduction of energy consumption
- Have bonuses when invoicing
- Optimization of equipment life (machine tools, etc.)
- Less CO₂ rejection (up to 95 kg for each kvar of power factor installed).
- Where to compensate ?
- Architecture
- Offered solutions and products
- Effect of compensation
Equipment at TGBT level :
- Very economical solution for the investment
- Increase of the power available at the secondary of the transformer
- No reduction in line losses
- No savings in the sizing of electrical equipment.
Equipment at the divisional switchboards :
- Solution perfectly adapted to extended distribution networks
- Reduction of line losses on pipelines from the TGBT
- Economical solution for the investment
- Increase in the power available at the transformer level according to the equipment level of the divisional feeders.
Equipment at load level :
- No voltage drop
- Savings on the sizing of electrical equipment
- Solution may be more expensive at the time of investment.
PRESENTATION OF HARMONICS
Other equipment (variable speed drives, inverters, arc furnaces, etc.) generate THD-V and THD-I voltage and current distortions which can reduce the operating efficiency of the equipment and cause the following problems :
- Damage to equipments
- Overload of the neutral conductor
- Overheating of transformers
- Damage to capacitor banks.
Harmonic filtering solutions reduce these phenomena. The presence of harmonics in electrical systems means that current and voltage are distorted into sinusoidal waveforms.
