CN217469752U

CN217469752U - Single-phase filtering and voltage stabilizing device for traction substation pavilion

Info

Publication number: CN217469752U
Application number: CN202220207843.9U
Authority: CN
Inventors: 姜占吉; 怀得桥; 赵俊国; 王俊清; 刘晓亮; 周志强; 叶习兵; 刘志彬; 肖新法; 符晓恒
Original assignee: CREC EEB Operation Maintenance Co Ltd
Current assignee: CREC EEB Operation Maintenance Co Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-09-20
Anticipated expiration: 2032-01-25

Abstract

The utility model discloses a single-phase filtering voltage stabilizer for a traction substation pavilion, which comprises a box body, wherein a circuit breaker, an alternating current contactor, a switching terminal row, a low-voltage parallel capacitor, a resistor and a single-phase reactor are arranged in the box body; the circuit breaker is connected with the alternating current contactor, one end of the low-voltage parallel capacitor is connected with the alternating current contactor, and the other end of the low-voltage parallel capacitor is connected with one end of the resistor and one end of the single-phase reactor respectively; the other end of the resistor is connected with the single-phase reactor, and the other end of the single-phase reactor is connected with the alternating current contactor; and the alternating current contactor is connected into the alternating current cabinet through the switching terminal strip. The utility model discloses a single-phase filtering voltage stabilizing device of traction substation pavilion has better security, reliability and can effectively realize filtering voltage stabilizing function, moreover the utility model has the advantages of the structure principle is simple, component layout simple to operate.

Description

Single-phase filtering and voltage stabilizing device for traction substation pavilion

Technical Field

The invention relates to the technical field of railway power supply, in particular to a single-phase filtering and voltage stabilizing device for a traction substation pavilion.

Background

With the increase of the power of the electric locomotive and the appearance of the compound-number centralized power motor train unit, the harmonic waves generated by the alternating-current/direct-current electric locomotive seriously affect the variable power supply quality of 27.5 kV. The existing line equipment of Jinghusu and Hukun has been operated for many years, the 10kV alternating current power supply is mainly used under the normal condition of an alternating current-direct current system in a traction substation pavilion, the 27.5kV alternating current power supply is reserved, and when the 10kV alternating current power supply in the traction substation cannot immediately recover power supply due to planned power failure maintenance or fault power failure. The 27.5kV substation transformer in the substation supplies power, the secondary voltage is influenced by higher harmonics and fluctuates obviously, secondary equipment such as a direct current power supply charging module, an inverter power supply module, a fire-fighting equipment controller and communication equipment in the traction substation are often burnt, the safe operation of the equipment in the traction substation is seriously influenced, and the equipment in the traction substation is seriously out of control, so that the driving safety is endangered. Particularly, after the existing line synthesis and the AC/DC equipment of Shanghai and Huhui are continuously completed in recent years, the problem is highlighted.

There are many solutions to this kind of problem in China, but all require a great investment. Most high-speed railway line traction substation pavilion alternating current-direct current systems all have configured power purifying cabinets and some rectification inverter devices, but the price is all very expensive.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pull single-phase filtering voltage regulator device in electric substation pavilion to the not enough of prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a single-phase filtering voltage-stabilizing device for a traction substation pavilion comprises a box body, wherein a circuit breaker, an alternating current contactor, a switching terminal row, a low-voltage parallel capacitor, a resistor and a single-phase reactor are arranged in the box body; the circuit breaker is connected with the alternating-current contactor, one end of the low-voltage parallel capacitor is connected with the alternating-current contactor, and the other end of the low-voltage parallel capacitor is connected with the resistor and one end of the single-phase reactor respectively; the other end of the resistor is connected with the single-phase reactor, and the other end of the single-phase reactor is connected with the alternating current contactor; and the alternating current contactor is connected into the alternating current cabinet through the switching terminal strip.

Further, the size of the box is 600cm 400cm 900 cm.

Further, a box body grounding terminal is arranged in the box body, the box body is provided with a box door, and the box door is provided with a box door grounding terminal.

The beneficial effects of the utility model reside in that: the utility model discloses a single-phase filtering voltage stabilizing device of traction substation pavilion has better security, reliability and can effectively realize filtering voltage stabilizing function, moreover the utility model has the advantages of the structure principle is simple, component layout simple to operate.

Drawings

Fig. 1 is a schematic structural diagram of an apparatus in embodiment 1 of the present invention;

fig. 2 is a schematic circuit diagram of an apparatus according to embodiment 1 of the present invention;

fig. 3 is a schematic view of the implementation effect of embodiment 1 of the present invention;

fig. 4 is a schematic view of the application of embodiment 2 of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.

The embodiment provides a single-phase filtering and voltage-stabilizing device for a traction substation pavilion, which comprises a box body 1, wherein a circuit breaker 2, an alternating current contactor 3, a switching terminal row, a low-voltage parallel capacitor 4, a resistor 5, a single-phase reactor 6, a cable box cable-penetrating inlet, a box body grounding terminal and a box door grounding terminal are arranged in the box body 1; the circuit breaker 2(J4) is connected to the ac contactor 3(KM3), one end of the low-voltage parallel capacitor 4(C) is connected to the ac contactor 3(KM3), and the other end is connected to the resistor 5(R) and one end of the monophase reactor 6(L), respectively; the other end of the resistor 5(R) is connected to the single-phase reactor 6(L), and the other end of the single-phase reactor 6(L) is connected to the ac contactor 3(KM 3); the alternating current contactor 3(KM3) is connected into an alternating current cabinet through a switching terminal block.

It should be noted that, by analyzing the reserved space of each ac/dc disk cabinet in each pavilion of each traction substation, it is determined that the size of the device in this embodiment is 600cm × 400cm × 900cm (i.e., the size of the box body), the color of the box body is RAL7035, and the right shaft is opened left. Therefore, the purposes of universal installation and batch production are achieved, and the installation application range of the device is widened.

It should be noted that the incoming line part of the single-phase filtering voltage-stabilizing device of the traction substation pavilion adopts a circuit breaker and an alternating current contactor, the input end of the circuit breaker is introduced by a 27.5kV alternating current power supply, and the power is taken by a contactor coil from the alternating current incoming line side contactor coil, so that the manual and automatic control of the single-phase filtering voltage-stabilizing device is realized, and the good sine wave output is ensured. The high-power capacitor, the resistor and the reactor can absorb various clutter and peak interference from an input power supply, and have double functions of voltage stabilization and interference resistance. Through repeated analysis and test, the security, the reliability and the filtering steady voltage function of the single-phase filtering steady voltage device of the traction substation pavilion of this embodiment all reach the expected effect. And the single-phase filtering voltage stabilizing device of the traction substation pavilion has the advantages of simple structure principle and convenient element layout and installation.

It should be noted that, in this embodiment, for the higher harmonics existing in the variable power supply used by the traction substation 27.5kV, the harmonic suppression is realized by adopting a passive high-pass filtering voltage-stabilizing manner. In practical application, the input end of the device is connected in parallel to the input end of the alternating current utility in a T connection mode. As shown in fig. 3, the device of the present embodiment presents a large impedance to the fundamental wave (50Hz) and a small amount of shunt to the fundamental wave, and presents a low impedance to the higher harmonics, so that most of the higher harmonic current is shunted, and the harmonic current is less transmitted to the electric equipment, thereby achieving the purpose of suppressing the harmonics.

The device of the embodiment can be compatible with existing running alternating current and direct current equipment in a matched mode, and the running condition and the state of the device are detected by the SCADA system of the traction substation.

Example 2

This embodiment is an application example of the device described in embodiment 1, as shown in fig. 4.

According to the requirements specified by the operation mode of the pavilion, the 10kV alternating-current power supply is used as a main power supply, the 27.5kV alternating-current power supply is used as a standby power supply, and when the power supply of the built-in 10kV alternating-current power supply cannot be immediately restored due to planned power failure maintenance or fault power failure, the built-in 27.5kV alternating-current power supply is used as a variable power supply. After the 10kV alternating current power supply recovers power supply, the 10kV alternating current power supply can be automatically put into main use. Therefore, as shown in fig. 4, the coil of the contactor KM3 of the device of the embodiment takes electricity from the coil of the contactor KM2 on the side of the ac incoming line, so that the effect of the self-switching and self-resetting function synchronous with the 27.5kV ac power supply can be realized, and the stability of the 10kV ac power supply and the filtering and voltage-stabilizing function of the 27.5kV ac power supply can be effectively guaranteed.

Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.

Claims

1. The single-phase filtering and voltage stabilizing device for the traction substation pavilion is characterized by comprising a box body (1), wherein a circuit breaker (2), an alternating current contactor (3), a switching terminal row, a low-voltage parallel capacitor (4), a resistor (5) and a single-phase reactor (6) are arranged in the box body (1); the circuit breaker (2) is connected with the alternating current contactor (3), one end of the low-voltage parallel capacitor (4) is connected with the alternating current contactor (3), and the other end of the low-voltage parallel capacitor is respectively connected with the resistor (5) and one end of the single-phase reactor (6); the other end of the resistor (5) is connected with the single-phase reactor (6), and the other end of the single-phase reactor (6) is connected with the alternating current contactor (3); and the alternating current contactor (3) is connected into the alternating current cabinet through the switching terminal strip.

2. The traction substation kiosk single phase filter regulator apparatus of claim 1 wherein the size of the box is 600cm x 400cm x 900 cm.

3. The single-phase filtering and voltage stabilizing device for the traction substation kiosk according to claim 1, wherein a box grounding terminal is provided in the box, the box is equipped with a box door, and the box door is provided with a box door grounding terminal.