CN106921147A - The incoming line switch cabinet protection device and its method of urban track traffic traction substation - Google Patents
The incoming line switch cabinet protection device and its method of urban track traffic traction substation Download PDFInfo
- Publication number
- CN106921147A CN106921147A CN201710201803.7A CN201710201803A CN106921147A CN 106921147 A CN106921147 A CN 106921147A CN 201710201803 A CN201710201803 A CN 201710201803A CN 106921147 A CN106921147 A CN 106921147A
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- Prior art keywords
- protection
- current
- direct current
- power set
- voltage bidirectional
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses the incoming line switch cabinet protection device and its method of a kind of urban track traffic traction substation.It includes direct current output positive pole; dc bus and direct current service entrance switch; high-voltage bidirectional traction power set is internally provided with IGBT power devices and internal protection circuitry; the lead end for detection of straight lines inlet wire current is connected with line between direct current output positive pole and direct current service entrance switch; protection circuit system is connected with lead end; protection circuit system includes current quick circuit, the high current body dropout protection circuit and reverse current protection circuit of direct current service entrance switch.The advantage of the invention is that：Under the conditions of being broken down inside high-voltage bidirectional traction power set, can be completely isolated with dc bus in institute by high-voltage bidirectional traction power set in time；By the action thresholding and action delay of reasonable selection reverse current protection, so that the function of disengagement failure adverse current can either be played, and in the absence of the situation of protection by mistake.
Description
Technical field
A kind of switching protective device the present invention relates to be provided with high-voltage bidirectional traction power set in urban track traffic,
The incoming line switch cabinet protection device and its method of specifically a kind of urban track traffic traction substation.
Background technology
It is well known that being provided with the tractive power supply system of high-voltage bidirectional traction power set and using simple diode rectification
Traditional tractive power supply system that device is powered has bigger difference in DC Line Fault feature, for example：High-voltage bidirectional traction power supply is filled
Put with energy in bidirectional flow ability, and the reverse current protection on traditional incoming line cabinet then mutually conflicts therewith, therefore, high pressure is installed double
Must be matched with the incoming line switch cabinet direct current in traction substation to the tractive power supply system of traction power set, so as to reach
To the purpose of direct current protecting, in the prior art, the incoming line switch cabinet direct current protecting function in traction substation is merely capable of being applicable
It is not applied for that high-voltage bidirectional traction confession is installed in the traditional tractive power supply system powered using simple diode rectifier
The tractive power supply system of electric installation, therefore, the tractive power supply system to being provided with high-voltage bidirectional traction power set carries out direct current
Incoming relay-protection is letter technical barrier to be solved.
The content of the invention
The technical problem to be solved in the present invention provide it is a kind of can be to being provided with the traction of high-voltage bidirectional traction power set
Electric power system carries out the incoming line switch cabinet protection device and its method of the urban track traffic traction substation of direct current incoming relay-protection.
In order to solve the above-mentioned technical problem, the special guarantor of incoming line switch cabinet of urban track traffic traction substation of the invention
Protection unit, including the direct current output positive pole being connected with high-voltage bidirectional traction power set, connect the straight of inlet wire of substation switch cubicle
Stream bus and the direct current service entrance switch between direct current output positive pole and dc bus, high-voltage bidirectional traction power set
IGBT power devices and internal protection circuitry are internally provided with, on the line between direct current output positive pole and direct current service entrance switch
The lead end for detection of straight lines inlet wire current is connected with, the protection circuit for protecting incoming line switch cabinet is connected with lead end
System, protection circuit system includes current quick circuit, the high current body dropout protection circuit of direct current service entrance switch with
And reverse current protection circuit, reverse current protection circuit can be used for high-voltage bidirectional traction power set is topological from traction substation work
Middle excision；The inlet wire that current quick circuit and high current body dropout protection circuit can be used for cutting off successively electric substation is opened
Close cabinet short trouble.
The guard method of the incoming line switch cabinet of above-mentioned urban track traffic traction substation, comprises the following steps：
(1) when the dc bus short circuit of electric substation, and after the internal protection of high-voltage bidirectional traction power set action failure,
Protection is threaded off as its back-up protection by the high current of current quick circuit and direct current service entrance switch, first by current quick-breaking
Protection circuit is protected, and after current quick acts failure, is then threaded off by the high current body of direct current service entrance switch
Protection cuts off short trouble as its remote back-up protection, so as to the short circuit trouble point of rear class dc bus and high-voltage bidirectional be led
Draw isolation between electric supply installation；
(2) after the direct-current short circuit protection act of high-voltage bidirectional traction power set exports failure, by direct current incoming line cabinet
Reverse current protection is used as its nearly back-up protection.
The setting valve of the current quick circuit presses Isd=Ksd·IlyTo determine, wherein, IlyFor high-voltage bidirectional draws
The action setting valve of overcurrent protection in electric supply installation, sets KsdWhen make high-voltage bidirectional traction power set direct-current short circuit protect lose
Current quick will be acted rapidly to protect the switching device of its major loop without damage after spirit, thus value be 1.1~
1.2。
The action setting valve that the high current is threaded off presses Itq=Ktq·IsdConfigured；Safety factor KtqValue be 1.3~
1.5；In Formulas Isd=Ksd·IlyAnd Formulas Itq=Ktq·IsdOn the basis of meet Ily＜ Isd, wherein IlySupplied for high-voltage bidirectional draws
The action setting valve of overcurrent protection in electric installation.
The advantage of the invention is that：The device surface is internally provided with the height of IGBT power devices and internal protection circuitry
The direct current incoming relay-protection demand of the tractive power supply system of bivector traction electric supply installation is pressed, being capable of completely compatible high-voltage bidirectional traction confession
The two-way alternating current-direct current energy flow process of electric installation, optimization is realized with the existing defencive function in high-voltage bidirectional traction power set inside
Coordinate, as the back-up protection of high-voltage bidirectional traction power set internal protection function, in high-voltage bidirectional traction power set
Under the conditions of portion breaks down, can be completely isolated with dc bus in institute by high-voltage bidirectional traction power set in time；By closing
The action thresholding and action delay of reason selection reverse current protection, so as to the function of disengagement failure adverse current can either be played, and do not deposit
In the situation of protection by mistake, protection sensitivity is significantly carried compared to traditional direct current incoming relay-protection device towards diode rectifier
It is high.
Brief description of the drawings
Fig. 1 is the theory diagram of the incoming line switch cabinet protection device of urban track traffic traction substation of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings with specific embodiment, to the service entrance switch of urban track traffic traction substation of the invention
Cabinet protection device and its method are described in further detail.
As illustrated, the incoming line switch cabinet protection device of urban track traffic traction substation of the invention, including with height
The direct current output positive pole of pressure bivector traction electric supply installation connection, connects the dc bus of inlet wire of substation switch cubicle and is arranged on
Direct current service entrance switch between direct current output positive pole and dc bus, high-voltage bidirectional traction power set is internally provided with IGBT work(
Rate device and internal protection circuitry, are connected with straight for detecting on the line between direct current output positive pole and direct current service entrance switch
The lead end of line inlet wire current, is connected with the protection circuit system for protecting incoming line switch cabinet, protection circuit system on lead end
Uniting includes current quick circuit, the high current body dropout protection circuit and reverse current protection circuit of direct current service entrance switch,
The reverse current protection circuit can be used for cutting off high-voltage bidirectional traction power set from traction substation work topology；Electric current
Fast tripping protection circuit and high current body dropout protection circuit can successively be used for cutting off the incoming line switch cabinet short circuit event of electric substation
Barrier.
A kind of guard method of the incoming line switch cabinet of urban track traffic traction substation, comprises the following steps：
(1) when the dc bus short circuit of electric substation, and after the internal protection of high-voltage bidirectional traction power set action failure,
Protection is threaded off as its back-up protection by the high current of current quick circuit and direct current service entrance switch, current quick and
It is to be protected by current quick circuit first that the high current of direct current service entrance switch is threaded off and protects specific protection act process
Shield, cuts off short trouble, after current quick acts failure, then by direct current inlet wire as its nearly back-up protection action
The protection of threading off of the high current body of switch cuts off short trouble as its remote back-up protection, so as to by the short of rear class dc bus
Isolate between road trouble point and high-voltage bidirectional traction power set；
Wherein, adjusting for current quick must ensure that IGBT does not damage device, therefore electricity under most poor working conditions
The setting valve of the disconnected protection circuit of flow velocity presses Isd=Ksd·IlyTo determine, wherein, IlyIt is excessively stream in high-voltage bidirectional traction power set
The action setting valve of protection, sets KsdWhen need consider high-voltage bidirectional traction power set direct-current short circuit protection failure after electricity
Stream fast tripping protection will be acted rapidly to protect the switching device of its major loop without damage, therefore value is 1.1~1.2.Big electricity
The main body protection that stream is threaded off as direct current service entrance switch, is swift in motion and does not rely on software control and use hardware to realize.
As the back-up protection of the current quick of the direct-current short circuit protection and incoming line cabinet of high-voltage bidirectional traction power set, big electricity
Flow the action setting valve threaded off and press Itq=Ktq·IsdConfigured；For the malfunction for preventing high current from threading off and in view of high pressure
The relaying configuration situation of bivector traction electric supply installation, common safety factor KtqValue is larger, can be 1.3~1.5, in Formulas Isd
=Ksd·IlyAnd Formulas Itq=Ktq·IsdOn the basis of meet Ily＜ Isd, wherein IlyIt is mistake in high-voltage bidirectional traction power set
Flow the action setting valve of protection.
(2) when the generation of high-voltage bidirectional traction power set inside, IGBT power devices puncture, support capacitor punctures, busbar
When insulating element punctures situation, high-voltage bidirectional traction power set is cut from traction substation work topology by reverse current protection
Remove；That is after the direct-current short circuit protection act of high-voltage bidirectional traction power set exports failure, by direct current incoming line cabinet
Reverse current protection is used as its nearly back-up protection；
Wherein, the software excessively stream of direct-current short circuit protection acts setting valve I in high-voltage bidirectional traction power setlyIn usual feelings
Necessarily more than the maximum feedback flow valuve I of this road direct current inlet wire under conditionklmax/ 2, in the reverse current protection configuration of direct current incoming line cabinet, in order to
Meet the selective setting principle of protection, it is necessary first to additional delay Δ is introduced when the reverse current protection of direct current incoming line cabinet is acted
T1, protected with the direct-current short circuit for ensuring high-voltage bidirectional traction power set and acted prior to the reverse current protection in direct current incoming line cabinet.ΔT1
The main direct-current short circuit operating time of protection Δ T for containing high-voltage bidirectional traction power setzbAnd the adverse current of incoming line switch cabinet
Protection additional delay Δ Tzbfj.Δ T under normal circumstanceszbfj≈1.5ΔTzb；Reverse current protection action setting valve Inl2I should be metnl2=
Knl12·Inl1, wherein Inl1The threshold value of internal short-circuit judgement, safety factor K are carried out for traction power setnl12Take 1~1.1.
Claims (4)
1. a kind of incoming line switch cabinet protection device of urban track traffic traction substation, it is characterised in that：Including double with high pressure
To the direct current output positive pole that traction power set is connected, the dc bus of inlet wire of substation switch cubicle is connected and installed in direct current
Direct current service entrance switch between output cathode and dc bus, the high-voltage bidirectional traction power set is internally provided with IGBT work(
Rate device and internal protection circuitry, are connected with for examining on the line between the direct current output positive pole and direct current service entrance switch
The lead end of straight line inlet wire current is surveyed, the protection circuit system for protecting incoming line switch cabinet, institute are connected with the lead end
Protection circuit system is stated including current quick circuit, the high current body dropout protection circuit of direct current service entrance switch and inverse
Stream protection circuit, the reverse current protection circuit can be used for for high-voltage bidirectional traction power set working topological from traction substation
Middle excision；The current quick circuit and high current body dropout protection circuit can be used for cutting off entering for electric substation successively
Wiretap cabinet short trouble.
2. according to the urban track traffic traction substation described in claim 1 incoming line switch cabinet guard method, its feature
It is to comprise the following steps：
(1) when the dc bus short circuit of electric substation, and after the internal protection of high-voltage bidirectional traction power set action failure, by electricity
The high current of the disconnected protection circuit of flow velocity and direct current service entrance switch threads off protection as its back-up protection, first by current quick
Circuit is protected, and after current quick acts failure, is then threaded off by the high current body of direct current service entrance switch and protected
Short trouble is cut off as its remote back-up protection, is supplied so as to the short circuit trouble point of rear class dc bus and high-voltage bidirectional be drawn
Isolate between electric installation；
(2) after the direct-current short circuit protection act of high-voltage bidirectional traction power set exports failure, by the adverse current of direct current incoming line cabinet
Protection is used as its nearly back-up protection.
3. according to the urban track traffic traction substation described in claim 2 incoming line switch cabinet guard method, its feature
It is：The setting valve of the current quick circuit presses Isd=Ksd·IlyTo determine, wherein, IlySupplied for high-voltage bidirectional draws
The action setting valve of overcurrent protection in electric installation, sets KsdWhen make high-voltage bidirectional traction power set direct-current short circuit protect failure
Current quick will be acted rapidly to protect the switching device of its major loop without damage afterwards, therefore value is 1.1~1.2.
4. according to the urban track traffic traction substation described in claim 3 incoming line switch cabinet guard method, its feature
It is：The action setting valve that the high current is threaded off presses Itq=Ktq·IsdConfigured；Safety factor KtqValue be 1.3~
1.5；In Formulas Isd=Ksd·IlyAnd Formulas Itq=Ktq·IsdOn the basis of meet Ily＜ Isd, wherein IlySupplied for high-voltage bidirectional draws
The action setting valve of overcurrent protection in electric installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201803.7A CN106921147B (en) | 2017-03-30 | 2017-03-30 | The incoming line switch cabinet protective device and its method of urban track traffic traction substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201803.7A CN106921147B (en) | 2017-03-30 | 2017-03-30 | The incoming line switch cabinet protective device and its method of urban track traffic traction substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106921147A true CN106921147A (en) | 2017-07-04 |
| CN106921147B CN106921147B (en) | 2019-10-29 |
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ID=59460501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710201803.7A Active CN106921147B (en) | 2017-03-30 | 2017-03-30 | The incoming line switch cabinet protective device and its method of urban track traffic traction substation |
Country Status (1)
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| CN (1) | CN106921147B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202455048U (en) * | 2012-01-19 | 2012-09-26 | 无锡市科环自动化设备有限公司 | Bus failure main protection device of track traffic power supply system |
| CN105762758A (en) * | 2016-04-14 | 2016-07-13 | 南京南瑞继保电气有限公司 | Direct current side protection method of regeneration energy recovery system |
-
2017
- 2017-03-30 CN CN201710201803.7A patent/CN106921147B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202455048U (en) * | 2012-01-19 | 2012-09-26 | 无锡市科环自动化设备有限公司 | Bus failure main protection device of track traffic power supply system |
| CN105762758A (en) * | 2016-04-14 | 2016-07-13 | 南京南瑞继保电气有限公司 | Direct current side protection method of regeneration energy recovery system |
Non-Patent Citations (1)
| Title |
|---|
| 黄海浪: "大连地铁直流牵引供电系统保护配置及整定研究", 《城市轨道交通研究》 * |
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| CN106921147B (en) | 2019-10-29 |
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