Effect of damper on series reactor

In the 20th century, great efforts have been made to improve the anti vibration ability of buildings in the past two or three decades, and achievements have been made. Skillfully avoid or reduce the damage of earthquake and wind. Base isolation, various energy absorption and energy dissipation systems using dampers, mass resonance damping system on the roof of high-rise buildings and active control damping system are all engineering practice.

It is no longer a new technology to use damping to absorb energy. In aerospace, military, gun, automobile and other industries, various kinds of dampers have been used to reduce energy. After 1970, people gradually used damper technology in construction, bridge, railway and other projects, and its development is very rapid. By the end of the 20th century, more than 100 projects had used dampers. By 2003, Taylor alone had installed 110 buildings, bridges or other structures.

Avoid over-voltage damage to capacitors. If it is not added, the switch must be replaced, which is more troublesome. 3. When the switch is cut off or reburning, over-voltage will be generated. The voltage on the series reactor exceeds the breakdown voltage of the vacuum gap, and the true space gap will be broken down and discharged. The reactor consumes the breakdown voltage of the vacuum gap, and the damping circuit will play a transitional role, so as to suppress the over-voltage on the capacitor and reactor. Install the damping reactor in the capacitor circuit When the capacitor circuit is put into operation, it can restrain the inrush current. At the same time, it forms the harmonic circuit with the capacitor bank, which plays the filtering role of each harmonic. For example, in the capacitor circuit of the 35kV reactive power compensation device of 500kV substation, in order to limit the inrush current when the capacitor is put into operation and suppress the high-order harmonic of the power system, a damping reactor must be installed in the 35kV capacitor circuit. When the third harmonic is suppressed, a dry air core single-phase outdoor damping reactor with a rated voltage of 35kV, a rated inductance of 26.2mh and a rated current of 350A is used, which is electrically connected with 2.52mvar The vessel forms a resonance circuit for the third harmonic, that is, the third harmonic filter circuit. Similarly, in order to suppress the 5th and higher harmonics, a single-phase outdoor damping reactor with a rated voltage of 35kV, a rated inductance of 9.2mh and a rated current of 382A is used. It forms a resonance circuit with a capacitor of 2.52mvar for the 5th and higher harmonics.

The damper is used to protect the electronic contactor and prevent the surge current of the capacitor from impacting the contactor.

    Avoid over-voltage damage to capacitors. If it is not added, the switch must be replaced, which is more troublesome. 3. When the switch is cut off or reburning, over-voltage will be generated. The voltage on the series reactor exceeds the breakdown voltage of the vacuum gap, and the true space gap will be broken down and discharged. The reactor consumes the breakdown voltage of the vacuum gap, and the damping circuit will play a transitional role, so as to suppress the over-voltage on the capacitor and reactor. Install the damping reactor in the capacitor circuit When the capacitor circuit is put into operation, it can restrain the inrush current. At the same time, it forms the harmonic circuit with the capacitor bank, which plays the filtering role of each harmonic. For example, in the capacitor circuit of the 35kV reactive power compensation device of 500kV substation, in order to limit the inrush current when the capacitor is put into operation and suppress the high-order harmonic of the power system, a damping reactor must be installed in the 35kV capacitor circuit. When the third harmonic is suppressed, a dry air core single-phase outdoor damping reactor with a rated voltage of 35kV, a rated inductance of 26.2mh and a rated current of 350A is used, which is electrically connected with 2.52mvar The vessel forms a resonance circuit for the third harmonic, that is, the third harmonic filter circuit. Similarly, in order to suppress the 5th and higher harmonics, a single-phase outdoor damping reactor with a rated voltage of 35kV, a rated inductance of 9.2mh and a rated current of 382A is used. It forms a resonance circuit with a capacitor of 2.52mvar for the 5th and higher harmonics.