The invention discloses a circuit and method for suppressing overvoltage and harmonic waves generated when a locomotive passes through a neutral phase insulator. One end of the circuit is electricallyconnected with a neutral section of the neutral phase insulator of the locomotive, the other end of the circuit is grounded, the locomotive forms a loop with the neutral section and the ground when passing through the neutral phase insulator; a resistor R in the circuit can be used for consuming high-frequency oscillation energy; an inductor L has the characteristics of low frequency resistance and high frequency resistance, so the power frequency current flowing to the R is reduced, and the consumption of the power frequency current is reduced; and a capacitor C has the characteristic that the voltage cannot be suddenly changed, so the overvoltage rising speed can be reduced. The circuit not only can suppress an overvoltage, but also can form a second-order high-pass filter to filter harmonic waves, and after the circuit is additionally arranged on the neutral section of the neutral phase insulator, the harm caused by the overvoltage can be reduced.
本发明公开了一种抑制机车过分相时产生过电压与谐波的电路及方法,该电路一端与机车电分相的中性段电连接,其另一端接地,机车在过分相时与中性段和大地形成回路,该电路中的电阻R可用来消耗高频振荡的能量;而电感L因具有通低频阻高频的特性,所以流向R的工频电流将会减少,从而降低工频电流的消耗;而电容C则是因为其具有电压不能突变的特性,过电压上升速度将会得到减缓。该装置不仅能抑制过电压,同时还能构成一个二阶高通滤波器,滤除谐波,在电分相的中性段上加装该装置后可以降低过电压带来的危害。
Circuit and method for suppressing overvoltage and harmonic waves generated when locomotive passes through neutral phase insulator
一种抑制机车过分相时产生过电压与谐波的电路及方法
2020-06-12
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen |
Arcing overvoltage and passing neutral section VCB operation overvoltage suppression method
European Patent Office | 2023
|Electric locomotive, power supply system thereof and grid-side overvoltage suppression method
European Patent Office | 2023
|CONTROL METHOD FOR SUPPRESSING LOW-SPEED IDLING OF LOCOMOTIVE
European Patent Office | 2023
|