Damping resistors used in harmonic filter systems are designed to suppress harmonic distortion generated in electrical networks due to the operation of power electronic converters.
The main issues caused by harmonics include:
Damping resistors, used in combination with reactors and capacitors, provide effective harmonic suppression and filtering.
The design depends on the required technical characteristics and operating conditions.
Damping resistors are custom-designed according to customer technical specifications.
| Insulation voltage, kV | up to 110 |
| Resistance range, Ω | 1 ÷ 10000 |
| Rated (continuous) power, MW | up to 1 |
| Peak power, MW | up to 12 |
| Protection rating | from IP00 to IP54 |
| Enclosure material | galvanized steel / painted steel / stainless steel |
| Resistor type | single-phase / three-phase |
Damping resistors are designed to absorb and dissipate the energy of electric and magnetic fields in oscillatory RLC harmonic filter circuits. They provide damping of oscillations caused by energy exchange between capacitors and inductors through resistive losses.
They also reduce the dependency of filter performance on grid parameters, ensuring stable operation.
Harmonics generated by modern non-linear loads represent a significant issue in power systems. Harmonic components are currents with frequencies that are multiples of the fundamental frequency. These harmonics distort both current and voltage waveforms.
Such distortions degrade power quality, increase losses, introduce measurement errors, reduce equipment and cable lifetime, and may adversely affect other connected loads.
Typical sources of harmonics include:
