CN104821576A - Direct-current traction power supply system based on buck type direct-current converter and control method thereof - Google Patents
Direct-current traction power supply system based on buck type direct-current converter and control method thereof Download PDFInfo
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- CN104821576A CN104821576A CN201510176262.8A CN201510176262A CN104821576A CN 104821576 A CN104821576 A CN 104821576A CN 201510176262 A CN201510176262 A CN 201510176262A CN 104821576 A CN104821576 A CN 104821576A
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- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000007812 deficiency Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 208000001953 Hypotension Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000036543 hypotension Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The invention discloses a direct current traction power supply system based on a buck type direct current-direct current converter and a control method thereof.A traction transformer TT is additionally arranged in each substationi-1And a rectifier unit Ui-1The rectifying device is formed; a BUCK type DC-DC converter BUCK is arranged between the two substations. The BUCK type direct-current converter BUCK is controlled through voltage and current tracking, the functions of voltage reduction and power output are achieved, load power and the voltage at the tail end of the contact network are compensated, the problems that the voltage drop of the contact network is serious and the load power is insufficient in the peak operating period are solved, and technical guarantee is provided for increasing the distance between a power supply arm and a traction substation.
Description
Technical field
The invention belongs to traffic and transport field, particularly relate to a kind of Novel DC tractive power supply system based on voltage-dropping type straight convertor and control method thereof.
Background technology
The invention belongs to traffic and transport field, particularly relate to a kind of Novel DC tractive power supply system based on voltage-dropping type straight convertor and control method thereof.
Background technology
DC traction power-supply system refers to the galvanic tractive power supply system obtained through rectification from the AC power of utility network, is used for the power supply of the urban track traffic such as subway, light rail.DC traction power-supply system is made up of traction substation and contact line, usually, by two-way, independently (middle pressure) AC power and two 12 pulse traction rectifier units forming equivalent 24 pulse waves are side by side formed traction substation, traction rectifier unit is made up of traction transformer and diode rectifier and annex, and Traction networks is made up of contact line (or conductor rail) and rail.
During operation peak, Traction networks electric current increases, contact line crushing is serious, system very likely cannot provide the power needed for traction load, and this plays serious impact to the reliability service of system, in addition, distance between two traction substations of DC traction power-supply system is generally 2-4km, by the impact of contact line voltage drop, power supply distance cannot lengthen, the enormous expenditure investment causing traction substation to be built.Obviously, increase power supply distance and guaranteed load power are the Important Actions improving DC traction power-supply system technical performance and economic performance.
For solving the problem of contact line voltage drop and load power, the present invention has established a voltage-dropping type straight convertor in the middle of two traction substations, by the control method of voltage, current tracking, this converter not only can ensure contact line power supply level, power can also be provided for traction load, solve the problem of the serious and load power deficiency of contact line voltage drop, thus provide technique guarantee for increase electric substation spacing.
Summary of the invention
Technical problem of the present invention is to provide a kind of DC traction power-supply system based on voltage-dropping type straight convertor and control method thereof to solve the problem of the serious and load power deficiency of contact line voltage drop, for increase electric substation spacing provides technique guarantee.
The present invention solves its technical problem, and the technical scheme adopted is:
Based on a DC traction power-supply system for voltage-dropping type straight convertor, the Traction networks be made up of multiple traction substation SS, contact wire C and rail R forms, and each traction substation SS has by traction transformer TT
iwith Rectification Power Factor U
ithe rectifying device formed, Rectification Power Factor U
idC side is directly connected with rail R by contact wire C, it is characterized in that, sets up a set of by traction transformer TT in each electric substation
i-1with Rectification Power Factor U
i-1the rectifying device formed, sets up rectifying device and is also connected across between AC power and Traction networks, set up Rectification Power Factor U
i-1negative pole and original 24 pulse waves (12 pulse wave) Rectification Power Factor U
ipositive pole serial connection; Between two electric substations, arrange a voltage-dropping type straight convertor BUCK, this voltage-dropping type straight convertor BUCK positive source is connected on sets up rectifier cabinet U
i-1positive pole serial connection and adjacent electric substation set up rectifier cabinet U
i+2between, i is non-zero nature even number; The load positive and negative electrode of this voltage-dropping type straight convertor BUCK is connected to two electric substations middle contact wire C and rail R respectively.
Another object of the present invention is to provide a kind of control method adopting as above electric power system.Following means are adopted to realize goal of the invention.
Based on a direct-current traction power supply method for voltage-dropping type straight convertor, adopt one of following Three models footpath by voltage, current follow-up control voltage-dropping type straight convertor BUCK in system described in claim 1, realize the function of step-down and power stage:
Pattern (1): load is by stream set-point I
che *with load by flowing value of feedback I
checompare, regulated by PI and deliver to PWM generator;
Pattern (2): voltage-dropping type straight convertor BUCK output voltage set-point V
buck *with voltage-dropping type straight convertor BUCK output voltage value of feedback V
buckcompare, regulated by PI and deliver to PWM generator;
Pattern (3): voltage-dropping type straight convertor BUCK output voltage set-point V
buck *with voltage-dropping type straight convertor BUCK output voltage value of feedback V
buckcompare, carry out electric current loop tracing control again after being regulated by PI, finally deliver to PWM generator;
Flexibly through the output signal of PWM generator, switching selection is carried out to two-way according to job requirement, then outputed signal the K switch that Pulse is delivered to voltage-dropping type straight convertor BUCK circuit, control its deciliter.
Adopt apparatus and method of the present invention, by the Rectification Power Factor U set up
1solve the problem of the serious and load power deficiency of contact line voltage drop with voltage-dropping type straight convertor BUCK, can increase the distance between supply arm and traction substation, be innovation and the Important Action of raising DC traction power-supply system technical performance and economic performance.
The most important thing is: adopt the control method of voltage, current tracking to voltage-dropping type until converter BUCK controls, it is made to compensate load power and contact line terminal voltage, thus the problem of contact line voltage drop serious and load power deficiency when solving operation peak period, thus provide technique guarantee for the distance between increase supply arm and traction substation.。
Accompanying drawing explanation
Fig. 1 is Traditional DC tractive power supply system electric substation structure chart.
Fig. 2 is the Novel DC tractive power supply system structure chart based on voltage-dropping type straight convertor provided by the invention.
Fig. 3 is the control principle drawing of voltage-dropping type straight convertor provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, apparatus and method of the present invention are described in further detail.
Fig. 1 is Traditional DC tractive power supply system electric substation structure chart, and Fig. 2 is the Novel DC tractive power supply system structure chart based on voltage-dropping type straight convertor BUCK.As shown in Figure 1, Liang Ge electric substation DC side is directly connected with rail R by contact wire C.
For ease of describing, following Qu Liangge electric substation SS
1and SS
2for example describes, now i gets 2, without loss of generality.
The embodiment of the present invention as shown in Figure 2, at two traction substation SS
1and SS
2a voltage-dropping type straight convertor BUCK is established in centre, the positive source of voltage-dropping type straight convertor BUCK with set up Rectification Power Factor U
1positive pole serial connection, the load positive pole of voltage-dropping type straight convertor BUCK connects with contact wire C, and the load negative pole of voltage-dropping type straight convertor BUCK is connected with rail R.Set up Rectification Power Factor U
1negative pole and original 24 pulse waves (12 pulse wave) Rectification Power Factor U
2positive pole serial connection, voltage-dropping type straight convertor BUCK is located at two electric substation S
1with S
2centre, the positive source of voltage-dropping type straight convertor BUCK with set up rectifier cabinet U
1positive pole is connected in series, and the load positive and negative electrode of voltage-dropping type straight convertor BUCK is connected to two electric substations middle contact wire C and rail R respectively.
Its control method is see Fig. 3, and the control principle drawing of voltage-dropping type straight convertor, by the control method of voltage, current tracking to the control of voltage-dropping type straight convertor BUCK, thus realizes power stage and ensure the function of supply power voltage.
Its concrete steps are: pattern 1: load is by stream set-point I
che *with load by flowing value of feedback I
checompare, regulated by PI, exported and deliver to PWM generator.Pattern 2: voltage-dropping type straight convertor BUCK output voltage set-point V
buck *with voltage-dropping type straight convertor BUCK output voltage value of feedback V
buckcompare, regulated by PI, exported and deliver to PWM generator.Mode 3: comprehensive first two pattern, adopts the method for outer loop voltag, interior circular current, ensures the instruction of electric current output tracking when ensureing voltage stabilization.Switching selection can be carried out to two-way through the output signal of PWM generator flexibly according to job requirement, then be outputed signal the K switch that Pulse is delivered to voltage-dropping type straight convertor BUCK circuit, control its deciliter.
Adopt the control method of Fig. 3 can controlled hypotension type straight convertor BUCK, realize power stage and ensure the function of supply power voltage, thus solve the problem of the serious and load power deficiency of contact line voltage drop, increase and power and the distance of traction substation.
More than show and describe organization plan of the present invention, control method, general principle and advantage of the present invention; the technical staff of the industry should understand; the present invention is not restricted to the described embodiments; just organization plan of the present invention, control method and general principle that above-described embodiment and specification describe; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in claimed scope of the present invention, and application claims protection range is defined by appended claims and equivalence thereof.
Claims (2)
1. the DC traction power-supply system based on voltage-dropping type straight convertor, the Traction networks be made up of multiple traction substation SS, contact wire C and rail R forms, each traction substation SS has the rectifying device be made up of traction transformer TTi and Rectification Power Factor Ui, Rectification Power Factor Ui DC side is directly connected with rail R by contact wire C, it is characterized in that, set up in each electric substation a set of by traction transformer TT
i-1with Rectification Power Factor U
i-1the rectifying device formed, sets up rectifying device and is also connected across between AC power and Traction networks, set up Rectification Power Factor U
i-1negative pole and original Rectification Power Factor U
ipositive pole serial connection; Between two electric substations, arrange a voltage-dropping type straight convertor BUCK, this voltage-dropping type straight convertor BUCK positive source is connected on sets up rectifier cabinet U
i-1positive pole serial connection and adjacent electric substation set up rectifier cabinet U
i+2between, i is non-zero nature even number; The load positive and negative electrode of this voltage-dropping type straight convertor BUCK is connected to two electric substations middle contact wire C and rail R respectively.
2., based on a direct-current traction power supply method for voltage-dropping type straight convertor, adopt one of following Three models footpath by voltage, current follow-up control voltage-dropping type straight convertor BUCK in system described in claim 1, realize the function of step-down and power stage:
Pattern (1): load is by stream set-point I
che *with load by flowing value of feedback I
checompare, regulated by PI and deliver to PWM generator;
Pattern (2): voltage-dropping type straight convertor BUCK output voltage set-point V
buck *with voltage-dropping type straight convertor BUCK output voltage value of feedback V
buckcompare, regulated by PI and deliver to PWM generator;
Pattern (3): voltage-dropping type straight convertor BUCK output voltage set-point V
buck *with voltage-dropping type straight convertor BUCK output voltage value of feedback V
buckcompare, carry out electric current loop tracing control again after being regulated by PI, finally deliver to PWM generator;
Flexibly through the output signal of PWM generator, switching selection is carried out to two-way according to job requirement, then outputed signal the K switch that Pulse is delivered to voltage-dropping type straight convertor BUCK circuit, control its deciliter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510176262.8A CN104821576B (en) | 2015-04-14 | 2015-04-14 | Direct current traction power supply system based on buck type direct current-direct current converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510176262.8A CN104821576B (en) | 2015-04-14 | 2015-04-14 | Direct current traction power supply system based on buck type direct current-direct current converter |
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| CN104821576A true CN104821576A (en) | 2015-08-05 |
| CN104821576B CN104821576B (en) | 2018-07-24 |
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|---|---|---|---|
| CN201510176262.8A Expired - Fee Related CN104821576B (en) | 2015-04-14 | 2015-04-14 | Direct current traction power supply system based on buck type direct current-direct current converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490562A (en) * | 2015-12-31 | 2016-04-13 | 九江历源整流设备有限公司 | Oscillation suppression and current-sharing control method for 24-pulse phase-controlled rectifying power supply |
| CN109687330A (en) * | 2018-12-26 | 2019-04-26 | 中国煤炭科工集团太原研究院有限公司 | A kind of coal mine direct current 1500V stringing power supply system |
| CN109720241A (en) * | 2017-10-27 | 2019-05-07 | 西华大学 | A kind of anti-voltage wave device of subway train |
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| CN102299646A (en) * | 2011-09-06 | 2011-12-28 | 清华大学 | Alternating-current inductance-free and energy-saving high-voltage direct-current traction power supply current transformation device and control method thereof |
| US20120161518A1 (en) * | 2010-12-22 | 2012-06-28 | Stefan Schroeder | Method and system for control power in remote dc power systems |
| CN103434420A (en) * | 2013-07-29 | 2013-12-11 | 华北电力大学（保定） | Braking energy recovery type DC (Direct Current) traction power supply system basing on electric automobile charging |
| CN103683453A (en) * | 2013-11-12 | 2014-03-26 | 华南理工大学 | Regenerative braking urban rail power supply system with super-capacitor for energy storage, filtering and voltage stabilization |
| CN103879310A (en) * | 2012-12-21 | 2014-06-25 | 上海申通地铁集团有限公司维护保障中心 | Large trilateral shunt tripping power supply circuit at collinear running rail transit line bifurcation positions |
| CN103904636A (en) * | 2014-02-28 | 2014-07-02 | 株洲变流技术国家工程研究中心有限公司 | Direct current tractive power supply system based on flexible direct current power transmission |
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2015
- 2015-04-14 CN CN201510176262.8A patent/CN104821576B/en not_active Expired - Fee Related
Patent Citations (7)
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| CN1151598A (en) * | 1995-07-18 | 1997-06-11 | Gec阿尔斯托姆运输公司 | Voltage lowering device and asynchronous traction system supplied from single-phase mains supply incorporating device of this kind |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490562A (en) * | 2015-12-31 | 2016-04-13 | 九江历源整流设备有限公司 | Oscillation suppression and current-sharing control method for 24-pulse phase-controlled rectifying power supply |
| CN105490562B (en) * | 2015-12-31 | 2018-07-27 | 九江历源整流设备有限公司 | A kind of oscillation inhibition of 24 pulse wave phase control rectifier power supply and current-sharing control method |
| CN109720241A (en) * | 2017-10-27 | 2019-05-07 | 西华大学 | A kind of anti-voltage wave device of subway train |
| CN109687330A (en) * | 2018-12-26 | 2019-04-26 | 中国煤炭科工集团太原研究院有限公司 | A kind of coal mine direct current 1500V stringing power supply system |
| CN109687330B (en) * | 2018-12-26 | 2023-12-12 | 中国煤炭科工集团太原研究院有限公司 | DC 1500V overhead line power supply system for coal mine |
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| Publication number | Publication date |
|---|---|
| CN104821576B (en) | 2018-07-24 |
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