CN205195271U - Higher harmonic suppression device - Google Patents
Higher harmonic suppression device Download PDFInfo
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- CN205195271U CN205195271U CN201521040732.XU CN201521040732U CN205195271U CN 205195271 U CN205195271 U CN 205195271U CN 201521040732 U CN201521040732 U CN 201521040732U CN 205195271 U CN205195271 U CN 205195271U
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- higher harmonic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a higher harmonic suppression device for traction substation power transmission among the railway system, the higher harmonic who do not sets up on the three -phase power transmission line including three components restraines the unit, higher harmonic restraines the unit including the bandpass circuit that filters higher harmonic, with the parallelly connected maintenance switch of bandpass circuit, set up both sides switch I and the switch II parallelly connected with overhauing the switch at bandpass circuit respectively. The utility model discloses a higher harmonic suppression device concatenates in the export of change secondary side, successfully restraines the influence of electric locomotive's higher harmonic to used power.
Description
Technical field
The utility model relates to a kind of limitation of high harmonics device, for traction substation electric power transfer in the railway system.
Background technology
In the railway system, the power supply used of traction substation is all generally draw from Traction networks, and 27.5kV power supply exports 0.4kV three phase mains through inverse Scott Transformer.This mode makes the low voltage equipment of traction substation directly be subject to the harmonic influence of Traction networks, and frequent fault is even burnt.
Electric locomotive is the main source of harmonic wave in Traction networks.Electric locomotive is divided into two classes: early stage AC-DC and new-type friendship orthogonal type.The motor train unit that current China railways is run and high-power electric locomotive start generally to adopt hands over orthogonal type locomotive.Compared with early stage AC-DC locomotive, harmonic content is significantly less, and low-order harmonic significantly improves, but harmonic spectrum broadens, and higher harmonic content significantly increases.
Current high-order harmonic filtering device is the mode of inductor and reactor parallel connection, presents Low ESR for high order harmonic component.This scheme can solve the impact of high order harmonic component on low voltage equipment in traction substation preferably, but high pass branch road can cause and flows through become higher harmonic current and obviously increase, more unfavorable to become safe operation.And current high-order harmonic filtering device needs power-off when maintenance, affects the normal operation of equipment.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of limitation of high harmonics device, can filter high order harmonic component, and maintenance process is convenient, does not affect power consumption equipment and normally runs.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
Limitation of high harmonics device, comprise three components and be not arranged on limitation of high harmonics unit on three phase transmission line, described limitation of high harmonics unit comprise filter high order harmonic component band-pass circuit, the inspection switch in parallel with band-pass circuit, be separately positioned on the band-pass circuit both sides switch I in parallel with inspection switch and switch I I.
Further improvement of the utility model is: described band-pass circuit comprises the filter reactor and filtering capacitor that are connected in series.
Further improvement of the utility model is: described inspection switch is air circuit.
Further improvement of the utility model is: the impedance of filter reactor is 10 ~ 100mH.
Further improvement of the utility model is: the capacitive reactance of filtering capacitor is 100 ~ 1000 μ F.
Owing to adopting technique scheme, the beneficial effect that the utility model produces is:
Limitation of high harmonics device of the present utility model, be serially connected with the outlet of become secondary side, successfully suppress the high order harmonic component of electric locomotive on the impact of power supply used, the rejection rate of high order harmonic component reaches more than 80%.
The band-pass circuit resonance frequency of filter reactor of the present utility model and filtering capacitor composition is fundamental frequency, and impedance of fundamental frequency is approximately zero, then presents high resistant for high order harmonic component, can obviously suppress Traction networks higher harmonic current to flow into institute's low pressure side; Simultaneously; higher harmonic voltage is also shared primarily of filter reactor, and therefore, the utility model device is while the high order harmonic component impact solving low voltage equipment; also significantly reduce high order harmonic component to become harmful effect, make low voltage equipment, become and be effectively protected simultaneously.
Inspection switch of the present utility model is in off-state when the utility model normally works, and switch I and switch I I are in closure state, and close inspection switch when overhauling, cut-off switch I and switch I I overhauls, and has ensured the safety of maintenance.
Accompanying drawing explanation
Fig. 1 is the utility model circuit connection diagram;
Wherein: 1, filter reactor, 2, filtering capacitor, 3, inspection switch, 4, switch I, 5, switch I I, 6, low voltage equipment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details:
Limitation of high harmonics device, comprises three groups of limitation of high harmonics unit, and three groups of limitation of high harmonics unit are separately positioned on three phase line, and are arranged between transformation low side outlets and low voltage equipment 6.
Limitation of high harmonics unit comprises band-pass circuit, inspection switch 3, switch I 4 and switch I I5, inspection switch 3 is arranged on transmission line, band-pass circuit, switch I 4, switch I I5 series connection is also in parallel with inspection switch 3, band-pass circuit comprises the filter reactor 1 and filtering capacitor 2 that are connected in series, and band-pass circuit is arranged between switch I 4 and switch I I5.
The impedance of filter reactor 1 is 10 ~ 100mH.The capacitive reactance of filtering capacitor 2 is 100 ~ 1000 μ F.
The band-pass circuit resonance frequency of filter reactor and filtering capacitor composition is fundamental frequency, and impedance of fundamental frequency is approximately zero, then presents high resistant for high order harmonic component, can obviously suppress Traction networks higher harmonic current to flow into institute's low pressure side; Simultaneously; higher harmonic voltage is also shared primarily of filter reactor, and therefore, the utility model device is while the high order harmonic component impact solving low voltage equipment; also significantly reduce high order harmonic component to become harmful effect, make low voltage equipment, become and be effectively protected simultaneously.
Inspection switch 3 is in off-state when the utility model normally works, and switch I 4 and switch I I5 are in closure state, and close inspection switch 3 when overhauling, cut-off switch I4 and switch I I5 overhauls, and has ensured the safety of maintenance.
Limitation of high harmonics device of the present utility model, be serially connected with the outlet of become secondary side, successfully suppress the high order harmonic component of electric locomotive on the impact of power supply used, the rejection rate of high order harmonic component reaches more than 80%.
Claims (5)
1. limitation of high harmonics device, it is characterized in that: comprise three components and be not arranged on limitation of high harmonics unit on three phase transmission line, described limitation of high harmonics unit comprise filter the band-pass circuit of high order harmonic component, the switch I (4) being arranged on band-pass circuit two ends and switch I I(5), with band-pass circuit, switch I (4) and switch I I(5) inspection switch (3) in parallel.
2. limitation of high harmonics device according to claim 1, is characterized in that: described band-pass circuit comprises the filter reactor (1) and filtering capacitor (2) that are connected in series.
3. limitation of high harmonics device according to claim 2, is characterized in that: described inspection switch (3) is air circuit.
4. the limitation of high harmonics device according to Claims 2 or 3, is characterized in that: the impedance of filter reactor (1) is 10 ~ 100mH.
5. the limitation of high harmonics device according to Claims 2 or 3, is characterized in that: the capacitive reactance of filtering capacitor (2) is 100 ~ 1000 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521040732.XU CN205195271U (en) | 2015-12-15 | 2015-12-15 | Higher harmonic suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521040732.XU CN205195271U (en) | 2015-12-15 | 2015-12-15 | Higher harmonic suppression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195271U true CN205195271U (en) | 2016-04-27 |
Family
ID=55788227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521040732.XU Active CN205195271U (en) | 2015-12-15 | 2015-12-15 | Higher harmonic suppression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195271U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107978434A (en) * | 2017-12-15 | 2018-05-01 | 卧龙电气集团股份有限公司 | A kind of inverse Scott Transformer with harmonic carcellation function |
| CN109980644A (en) * | 2018-12-27 | 2019-07-05 | 中铁电气化局集团有限公司 | Harmonics restraint system for power supply used in Traction Substation of Electric Railway |
-
2015
- 2015-12-15 CN CN201521040732.XU patent/CN205195271U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107978434A (en) * | 2017-12-15 | 2018-05-01 | 卧龙电气集团股份有限公司 | A kind of inverse Scott Transformer with harmonic carcellation function |
| CN107978434B (en) * | 2017-12-15 | 2023-09-22 | 卧龙电气集团股份有限公司 | Inverse Scott transformer with harmonic elimination function |
| CN109980644A (en) * | 2018-12-27 | 2019-07-05 | 中铁电气化局集团有限公司 | Harmonics restraint system for power supply used in Traction Substation of Electric Railway |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |