CN204668951U - A kind of Novel electric electrified railway electric energy quality optimizing adjuster - Google Patents
A kind of Novel electric electrified railway electric energy quality optimizing adjuster Download PDFInfo
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- CN204668951U CN204668951U CN201520317403.9U CN201520317403U CN204668951U CN 204668951 U CN204668951 U CN 204668951U CN 201520317403 U CN201520317403 U CN 201520317403U CN 204668951 U CN204668951 U CN 204668951U
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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
- Y02E40/20—Active power filtering [APF]
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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
- Y02E40/30—Reactive power compensation
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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
Abstract
The utility model provides a kind of Novel electric electrified railway electric energy quality optimizing adjuster, includes isolating transformer, access reactor and multi-level converter; Described isolating transformer is two phase transformation three-phase isolation transformers, comprises the power output end be connected with traction substation, and its power input is provided with access reactor and is connected with the power output end of multi-level converter.Apply it to railway dragging electric power system namely can realize electric railway harmonic current, negative-sequence current and the power quality problem such as idle carry out continuously, dynamically, real-time tracking compensates, suppress voltage fluctuation and flicker, effective solution is non-linear due to locomotive load, the asymmetry of impact and electricity consumption causes harmonic current, the problem of idle and negative-sequence current, reach and optimize quality of power supply environment, improve the object of Power System Security And Reliability and saving energy and decreasing loss, and the control realization difficulty of adjuster is low, topological structure is simple, chain type cascade Mach-Zehnder interferometer technology is easy to realize.
Description
[technical field]
The utility model belongs to power electronic system and controls and electric energy quality optimizing control technology field, particularly relates to a kind of Novel electric electrified railway electric energy quality optimizing adjuster.
[background technology]
At present, electric railway has very important significance to the development promoting national economy and social progress.But because electric railway locomotive belongs to impact, non-linear, asymmetry load, to cause in traction substation and higher level's electric power system quality of power supply deterioration, occur the phenomenons such as harmonic current increase, electric current resultant distortion rate are large, negative-sequence current, voltage fluctuation and flicker.This reduces reliability, the fail safe of power system operation on the one hand, also increases the loss of electric power system on the other hand.
Traditional electric railway power quality adjusting device is mainly fixed capacitor, switched capacitor, TCR type SVC etc., easily caused and mend or owe to mend when wherein fixed capacitor carries out reactive power compensation, and easy and electrical network generation resonance; There is low-response in switched capacitor, may produce repeatedly the problems such as switching, and reliability is not high; TCR type SVC can dynamic compensation idle, but still there is limitation in application process, and undesirable to the tracking effect of locomotive impact load.Two facies pattern SVG of recent studies on to harmonic wave, negative phase-sequence and idlely can to compensate, but it controls complicated, and comparatively difficult when Large Copacity realizes.
[utility model content]
In order to solve the above-mentioned technical problem existed in prior art, the utility model provides a kind of realization and is optimized adjustment to power quality problems such as the current mode harmonic wave, negative-sequence current and the power factor that exist in electric railway electric power system are on the low side, and control realization difficulty is low, topological structure simple, chain type cascade Mach-Zehnder interferometer technology is easy to the Novel electric electrified railway electric energy quality optimizing adjuster that realizes.
The technical scheme that the utility model solution prior art problem adopts is:
A kind of Novel electric electrified railway electric energy quality optimizing adjuster, includes isolating transformer, access reactor and multi-level converter; Described isolating transformer is two phase transformation three-phase isolation transformers, comprises the power output end be connected with traction substation, and its power input is provided with access reactor and is connected with the power output end of multi-level converter.
Further, described isolating transformer is 2/3 type Scott isolating transformer, and its output comprises α end, β end and common port G, and input comprises x end, y end and z end; Described α end and β end access the Traction networks both sides brachium pontis of traction substation respectively, and described common port G accesses the Traction networks common wire c of traction substation, and described x end, y end are equipped with access reactor with z end and are connected with the power output end of multi-level converter.
Further, described access reactor is three-phase access reactor, described multi-level converter is three-phase chain type cascade multilevel converter, and described x end, y end and z end are connected on the power output end of three-phase chain type cascade multilevel converter through three-phase access reactor respectively.
Further, described three-phase chain type cascade multilevel converter adopts Y-connection, and every phase chain type cascade multilevel converter is made up of several cascade module.
Further, each cascade module is made up of two groups of half-bridge mode IGBT and shunt capacitances be connected in parallel, and often group half-bridge mode IGBT is made up of the IGBT that two are connected in series, and each IGBT is parallel with diode.
The beneficial effects of the utility model are as follows:
Adjuster of the present utility model passes through technique scheme, and be applied to railway dragging electric power system and namely can realize electric railway harmonic current, negative-sequence current and the power quality problem such as idle carry out continuously, dynamically, real-time tracking compensates, suppress voltage fluctuation and flicker, effective solution is non-linear due to locomotive load, the asymmetry of impact and electricity consumption causes harmonic current, the problem of idle and negative-sequence current, reach and optimize quality of power supply environment, improve the object of Power System Security And Reliability and saving energy and decreasing loss, and the control realization difficulty of adjuster is low, topological structure is simple, chain type cascade Mach-Zehnder interferometer technology is easy to realize.
[accompanying drawing explanation]
Fig. 1 is the structural representation of a kind of Novel electric electrified railway electric energy quality optimizing adjuster embodiment described in the utility model;
Fig. 2 is the structural representation of a kind of Novel electric electrified railway electric energy quality optimizing adjuster embodiment cascade module described in the utility model.
[embodiment]
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figures 1 and 2:
The utility model embodiment provides a kind of Novel electric electrified railway electric energy quality optimizing adjuster, includes isolating transformer 1, access reactor 2 and multi-level converter 3; Described isolating transformer 1 is two phase transformation three-phase isolation transformers, comprises the power output end be connected with traction substation, and its power input is provided with access reactor 2 and is connected with the power output end of multi-level converter 3.
Concrete structure can be: described isolating transformer 1 can be 2/3 type Scott (Scott) isolating transformer, and its output comprises α end, β end and common port G, and input comprises x end, y end and z end; Described α end and β end access the Traction networks both sides brachium pontis of traction substation respectively, described common port G accesses the Traction networks common wire c of traction substation, and described x end, y end are equipped with access reactor with z end and are connected with the power output end of multi-level converter 3.Wherein, the secondary voltage grade of described 2/3 type Scott isolating transformer can be 10kV, described access reactor 2 can be three-phase access reactor (as high-performance high-frequency reactor), described multi-level converter 3 can be three-phase chain type cascade multilevel converter, and described x end, y end and z end are connected on the power output end of three-phase chain type cascade multilevel converter through three-phase access reactor respectively; And three-phase chain type cascade multilevel converter adopts Y-connection, and every phase chain type cascade multilevel converter is made up of several cascade module 4, each cascade module 4 is made up of the two groups of half-bridge mode IGBT 41 be connected in parallel and a shunt capacitance 42, and often group half-bridge mode IGBT 41 is made up of the IGBT that two are connected in series, and each IGBT is parallel with diode (not showing in figure).
When Novel electric electrified railway electric energy quality optimizing regulator applications described in the utility model is to railway dragging electric power system, concrete structure is: this railway dragging electric power system, include traction substation 5 and described Novel electric electrified railway electric energy quality optimizing adjuster, the described power output end of Novel electric electrified railway electric energy quality optimizing adjuster is connected with the Traction networks brachium pontis of traction substation 5 and common wire; Namely A, B, C three phase mains of 110kV introduced by traction substation 5 from electric power system, be connected with the power input of the traction transformer be provided with in it, the power output end of described traction transformer is connected with the first brachium pontis 51 of Traction networks and the second brachium pontis 52, supply of electrical energy, and the common wire of the Traction networks of traction substation 5 is through rail ground connection.
During above-mentioned railway dragging electric power system work, realize two-phase offset current to be compensated by three-phase installation by two phase transformation three-phase isolation transformers, be easy to the control of traction convertor in traction substation 5, reduce electric pressure by two phase transformation three-phase isolation transformers, decrease the number of cascade module simultaneously, realize high-tension isolation, and access traction substation 5 two-phase brachium pontis, be easy to realize two-phase bridge arm balance and control; And every phase chain type cascade multilevel converter of multi-level converter 3 is made up of some cascade module 4, equivalent switching frequency is high, can realize the compensation to high order harmonic component.
Like this, by the control to this Novel electric electrified railway electric energy quality optimizing adjuster, namely can realize electric railway harmonic current, negative-sequence current and the power quality problem such as idle carry out continuously, dynamically, real-time tracking compensates, suppress voltage fluctuation and flicker, effective solution is non-linear due to locomotive load, the asymmetry of impact and electricity consumption causes harmonic current, the problem of idle and negative-sequence current, reach and optimize quality of power supply environment, improve the object of Power System Security And Reliability and saving energy and decreasing loss, and the control realization difficulty of adjuster is low, topological structure is simple, chain type cascade Mach-Zehnder interferometer technology is easy to realize.
In addition, the cascade number of the three-phase chain type cascade multilevel converter of Novel electric electrified railway electric energy quality optimizing adjuster described in the utility model can be 12 grades, equivalent switching frequency is higher, can administer high-frequency harmonic a series of in electrical network, and by the control to wholly-controled device IGBT in each cascade module 4, namely can carry out dynamically to the power quality problem in electric railway, in real time, tracing control, further increase the complexity of Novel electric electrified railway electric energy quality optimizing adjuster described in the utility model at control realization, the clear superiority of the aspects such as the feature of topological structure and the realization of chain type cascade Mach-Zehnder interferometer technology.
Above content is in conjunction with concrete optimal technical scheme further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection range of the present utility model.
Claims (5)
1. a Novel electric electrified railway electric energy quality optimizing adjuster, is characterized in that: include isolating transformer (1), access reactor (2) and multi-level converter (3); Described isolating transformer (1) is two phase transformation three-phase isolation transformers, comprise the power output end be connected with traction substation, its power input is provided with access reactor (2) and is connected with the power output end of multi-level converter (3).
2. Novel electric electrified railway electric energy quality optimizing adjuster according to claim 1, it is characterized in that: described isolating transformer (1) is 2/3 type Scott isolating transformer, its output comprises α end, β end and common port G, and input comprises x end, y end and z end; Described α end and β end access the Traction networks both sides brachium pontis of traction substation respectively, described common port G accesses the Traction networks common wire c of traction substation, and described x end, y end are equipped with access reactor with z end and are connected with the power output end of multi-level converter (3).
3. Novel electric electrified railway electric energy quality optimizing adjuster according to claim 2, it is characterized in that: described access reactor (2) is three-phase access reactor, described multi-level converter (3) is three-phase chain type cascade multilevel converter, and described x end, y end and z end are connected on the power output end of three-phase chain type cascade multilevel converter through three-phase access reactor respectively.
4. Novel electric electrified railway electric energy quality optimizing adjuster according to claim 3, it is characterized in that: described three-phase chain type cascade multilevel converter adopts Y-connection, and every phase chain type cascade multilevel converter is made up of several cascade module (4).
5. Novel electric electrified railway electric energy quality optimizing adjuster according to claim 4, it is characterized in that: each cascade module (4) is made up of the two groups of half-bridge mode IGBT (41) be connected in parallel and a shunt capacitance (42), and often group half-bridge mode IGBT (41) is made up of the IGBT that two are connected in series, and each IGBT is parallel with diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520317403.9U CN204668951U (en) | 2015-05-15 | 2015-05-15 | A kind of Novel electric electrified railway electric energy quality optimizing adjuster |
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| CN201520317403.9U CN204668951U (en) | 2015-05-15 | 2015-05-15 | A kind of Novel electric electrified railway electric energy quality optimizing adjuster |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451485A (en) * | 2016-08-31 | 2017-02-22 | 上海天晋电气科技有限公司 | Comprehensive control device for power quality of transformer of electrified railway traction substation |
| CN109167509A (en) * | 2018-09-27 | 2019-01-08 | 珠海万力达电气自动化有限公司 | Take into account the railway run-through line power supply of traction voltage compensation with railway power power supply |
| CN110797867A (en) * | 2019-11-08 | 2020-02-14 | 西南交通大学 | Single-phase or two-phase conversion three-phase power supply structure |
| CN111181176A (en) * | 2020-01-09 | 2020-05-19 | 西南交通大学 | Low-frequency damping self-adaptive compensation device of traction power supply system and control method thereof |
| CN113014129A (en) * | 2020-12-14 | 2021-06-22 | 中国矿业大学 | Control method of MMC converter applied to rail transit |
-
2015
- 2015-05-15 CN CN201520317403.9U patent/CN204668951U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451485A (en) * | 2016-08-31 | 2017-02-22 | 上海天晋电气科技有限公司 | Comprehensive control device for power quality of transformer of electrified railway traction substation |
| CN109167509A (en) * | 2018-09-27 | 2019-01-08 | 珠海万力达电气自动化有限公司 | Take into account the railway run-through line power supply of traction voltage compensation with railway power power supply |
| CN110797867A (en) * | 2019-11-08 | 2020-02-14 | 西南交通大学 | Single-phase or two-phase conversion three-phase power supply structure |
| CN110797867B (en) * | 2019-11-08 | 2023-02-07 | 西南交通大学 | Single-phase or two-phase conversion three-phase power supply structure |
| CN111181176A (en) * | 2020-01-09 | 2020-05-19 | 西南交通大学 | Low-frequency damping self-adaptive compensation device of traction power supply system and control method thereof |
| CN111181176B (en) * | 2020-01-09 | 2022-03-25 | 西南交通大学 | Low-frequency damping self-adaptive compensation device of traction power supply system and control method thereof |
| CN113014129A (en) * | 2020-12-14 | 2021-06-22 | 中国矿业大学 | Control method of MMC converter applied to rail transit |
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