CN106921147B - The incoming line switch cabinet protective device and its method of urban track traffic traction substation - Google Patents
The incoming line switch cabinet protective device and its method of urban track traffic traction substation Download PDFInfo
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- CN106921147B CN106921147B CN201710201803.7A CN201710201803A CN106921147B CN 106921147 B CN106921147 B CN 106921147B CN 201710201803 A CN201710201803 A CN 201710201803A CN 106921147 B CN106921147 B CN 106921147B
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- current
- protection
- 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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Abstract
The invention discloses a kind of incoming line switch cabinet protective device of urban track traffic traction substation and its methods.It includes direct current output anode; DC bus and direct current incoming switch; high-voltage bidirectional traction power set is internally provided with IGBT power device and internal protection circuitry; the lead end for detecting straight line inlet wire current is connected on line between direct current output anode and direct current incoming switch; protection circuit system is connected on lead end; protection circuit system includes current quick circuit, the high current ontology tripping protection circuit and reverse current protection circuit of direct current incoming switch.The present invention has the advantages that under the conditions of breaking down inside high-voltage bidirectional traction power set, it can be completely isolated by high-voltage bidirectional traction power set and DC bus in institute in time；By reasonably selecting the movement thresholding and action delay of reverse current protection, so that the function of disengagement failure adverse current can either be played, and there is no accidentally protect.
Description
Technical field
The present invention relates to the switching protective device for being equipped with high-voltage bidirectional traction power set in a kind of urban track traffic,
The incoming line switch cabinet protective device and its method of specifically a kind of urban track traffic traction substation.
Background technique
It is well known that being equipped with the tractive power supply system of high-voltage bidirectional traction power set and using simple diode rectification
Traditional tractive power supply system of device power supply has bigger difference in DC Line Fault feature, such as: high-voltage bidirectional traction power supply dress
It sets with energy in bidirectional flow ability, and the reverse current protection on traditional incoming line cabinet then mutually conflicts therewith, therefore, it is double to be equipped with high pressure
It must be matched to the tractive power supply system of traction power set with the incoming line switch cabinet direct current in traction substation, 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 in
In traditional tractive power supply system using the power supply of simple diode rectifier it is not applied for that high-voltage bidirectional traction confession is installed
Therefore the tractive power supply system of electric installation carries out direct current to the tractive power supply system for being equipped with high-voltage bidirectional traction power set
Incoming relay-protection is a technical problem urgently to be resolved.
Summary of the invention
The technical problem to be solved in the present invention provide it is a kind of being capable of traction to high-voltage bidirectional traction power set is equipped with
Power supply system carries out the incoming line switch cabinet protective 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 dedicated guarantor of incoming line switch cabinet of urban track traffic traction substation of the invention
Protection unit connects the straight of inlet wire of substation switchgear including the direct current output anode connecting with high-voltage bidirectional traction power set
Stream bus and the direct current incoming switch being mounted between direct current output anode and DC bus, high-voltage bidirectional traction power set
IGBT power device and internal protection circuitry are internally provided with, on the line between direct current output anode and direct current incoming switch
It is connected with the lead end for detecting straight line inlet wire current, the protection circuit for protecting incoming line switch cabinet is connected on lead end
System, protection circuit system includes current quick circuit, the high current ontology tripping protection circuit of direct current incoming switch with
And reverse current protection circuit, reverse current protection circuit can be used to work high-voltage bidirectional traction power set from traction substation topological
Middle excision；The inlet wire that current quick circuit and high current ontology tripping protection circuit successively can be used to cut off 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, comprising 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 movement failure,
Its back-up protection is used as by the tripping protection of the high current of current quick circuit and direct current incoming switch, first by current quick-breaking
Protection circuit is protected, and after current quick acts failure, is then threaded off by the high current ontology of direct current incoming switch
Protection cuts off short trouble as its remote back-up protection, so that the short circuit trouble point of rear class DC bus be led with high-voltage bidirectional
Draw and is isolated between power supply unit；
(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 as its nearly back-up protection.
The setting valve of the current quick circuit presses Isd=Ksd·IlyTo determine, wherein IlyFor high-voltage bidirectional traction
K is arranged in the movement setting valve of overcurrent protection in power supply unitsdWhen make high-voltage bidirectional traction power set direct-current short circuit protect lose
Current quick will act rapidly to protect the switching device of its major loop not damaged after spirit, thus value be 1.1~
1.2。
The movement setting valve of the high current tripping presses Itq=Ktq·IsdIt is configured；Safety factor KtqValue be 1.3~
1.5；In Formulas Isd=Ksd·IlyAnd Formulas Itq=Ktq·IsdOn the basis of meet Ily< Isd, wherein IlyIt draws and supplies for high-voltage bidirectional
The movement setting valve of overcurrent protection in electric installation.
The present invention has the advantages that the device surface is internally provided with the height of IGBT power device and internal protection circuitry
The direct current incoming relay-protection demand of the tractive power supply system of bivector traction power supply unit is pressed, it being capable of completely compatible high-voltage bidirectional traction confession
Existing defencive function, which is realized, inside the two-way alternating current-direct current energy flow process of electric installation, with high-voltage bidirectional traction power set optimizes
Cooperation, as the back-up protection of high-voltage bidirectional traction power set internal protection function, in high-voltage bidirectional traction power set
It, can be completely isolated by high-voltage bidirectional traction power set and DC bus in institute in time under the conditions of portion breaks down；Pass through conjunction
The movement thresholding and action delay of reason selection reverse current protection, so that the function of disengagement failure adverse current can either be played, and are not deposited
The case where accidentally protecting, protection sensitivity is substantially mentioned compared to traditional direct current incoming relay-protection device towards diode rectifier
It is high.
Detailed description of the invention
Fig. 1 is the functional block diagram of the incoming line switch cabinet protective device of urban track traffic traction substation of the present invention.
Specific embodiment
With reference to the accompanying drawing with specific embodiment, to the incoming switch of urban track traffic traction substation of the invention
Cabinet protective device and its method are described in further detail.
As shown, the incoming line switch cabinet protective device of urban track traffic traction substation of the invention, including with height
The direct current output anode for pressing the connection of bivector traction power supply unit, connects the DC bus of inlet wire of substation switchgear and is mounted on
Direct current incoming switch between direct current output anode and DC bus, high-voltage bidirectional traction power set are internally provided with IGBT function
Rate device and internal protection circuitry are connected on the line between direct current output anode and direct current incoming switch straight for detecting
The lead end of line inlet wire current is connected with the protection circuit system for protecting incoming line switch cabinet on lead end, protects circuit system
System includes current quick circuit, and circuit and reverse current protection circuit are protected in the high current ontology tripping of direct current incoming switch,
The reverse current protection circuit can be used to cut off high-voltage bidirectional traction power set from traction substation work topology；Electric current
Fast tripping protection circuit and high current ontology tripping protection circuit successively can be used to cut 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, comprising 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 movement failure,
By the high current of current quick circuit and direct current incoming switch tripping protection be used as its back-up protection, current quick and
It is to be protected first by current quick circuit that specific protection act process is protected in the high current tripping of direct current incoming switch
Shield cuts off short trouble as its nearly back-up protection movement, after current quick acts failure, then by direct current inlet wire
The high current ontology tripping protection of switch cuts off short trouble as its remote back-up protection, thus by the short of rear class DC bus
It is isolated between road fault point and high-voltage bidirectional traction power set；
Wherein, the adjusting of current quick must guarantee that IGBT does not damage device, therefore electricity under most poor working conditions
The setting valve for flowing fast tripping protection circuit presses Isd=Ksd·IlyTo determine, wherein IlyFor overcurrent in high-voltage bidirectional traction power set
K is arranged in the movement setting valve of protectionsdWhen need in view of high-voltage bidirectional traction power set direct-current short circuit protection failure after electricity
Stream fast tripping protection will act rapidly to protect the switching device of its major loop not damaged, therefore value is 1.1~1.2.Big electricity
Main body protection of the stream tripping as direct current incoming switch, is swift in motion and independent of software control and using hardware realization.
The back-up protection of the current quick of direct-current short circuit protection and incoming line cabinet as high-voltage bidirectional traction power set, big electricity
The movement setting valve of stream tripping presses Itq=Ktq·IsdIt is configured；In order to prevent high current tripping malfunction and consider high pressure
The relaying configuration situation of bivector traction power supply unit, 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 IlyFor mistake in high-voltage bidirectional traction power set
Flow the movement setting valve of protection.
(2) breakdown of IGBT power device, support capacitor breakdown, busbar occur inside high-voltage bidirectional traction power set
When insulating element punctures situation, high-voltage bidirectional traction power set is cut from traction substation work topology by reverse current protection
It removes；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 as its nearly back-up protection；
Wherein, the software overcurrent that direct-current short circuit is protected in high-voltage bidirectional traction power set acts setting valve IlyIn usual feelings
Centainly greater 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 introduce additional delay Δ in the reverse current protection movement of direct current incoming line cabinet
T1, to ensure the direct-current short circuit protection of high-voltage bidirectional traction power set prior to the reverse current protection movement in direct current incoming line cabinet.ΔT1
Mainly contain the direct-current short circuit operating time of protection Δ T of high-voltage bidirectional traction power setzbAnd the adverse current of incoming line switch cabinet
Protect additional delay Δ Tzbfj.Δ T under normal conditionszbfj≈1.5ΔTzb；Reverse current protection acts 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 protective device of urban track traffic traction substation, it is characterised in that: including double with high pressure
The direct current output anode connected to traction power set, connects the DC bus of inlet wire of substation switchgear and is mounted on direct current
Direct current incoming switch between output cathode and DC bus, the high-voltage bidirectional traction power set are internally provided with IGBT function
Rate device and internal protection circuitry are connected with for examining on the line between direct current output anode and direct current incoming switch
The lead end of direct current inlet wire current is surveyed, the protection circuit system for protecting incoming line switch cabinet, institute are connected on the lead end
Stating protection circuit system includes current quick circuit, the high current ontology tripping protection circuit of direct current incoming switch and inverse
Stream protection circuit, the reverse current protection circuit can be used to work high-voltage bidirectional traction power set from traction substation topological
Middle excision；The current quick circuit and high current ontology tripping protection circuit can successively be used to cut off electric substation into
Wiretap cabinet short trouble introduces additional delay Δ T1 in the reverse current protection movement of direct current incoming line cabinet, to ensure high-voltage bidirectional
The direct-current short circuit protection of traction power set is drawn prior to the reverse current protection movement in direct current incoming line cabinet, Δ T1 comprising high-voltage bidirectional
The direct-current short circuit operating time of protection Δ Tzb of the power supply unit and reverse current protection additional delay Δ Tzbfj of incoming line switch cabinet；It is inverse
Stream protection act setting valve Inl2 meets Inl2=Knl12 Inl1, and wherein Inl1 is in high-voltage bidirectional traction power set carries out
The threshold value of portion's short circuit judgement, safety factor Knl12 take 1~1.1.
2. a kind of protection of the incoming line switch cabinet protective device based on urban track traffic traction substation described in claim 1
Method, which 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 movement failure, by electricity
The high current tripping protection for flowing fast tripping protection circuit and direct current incoming switch is used as its back-up protection, first by current quick
Circuit is protected, and after current quick acts failure, is then threaded off and is protected by the high current ontology of direct current incoming switch
Short trouble is cut off as its remote back-up protection, so that the short circuit trouble point of rear class DC bus and high-voltage bidirectional traction be supplied
It is isolated 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. guard method according to claim 2, it is characterised in that: the setting valve of the current quick circuit is pressed
Isd=KsdIly is determined, wherein Ily is the movement setting valve of overcurrent protection in high-voltage bidirectional traction power set, setting
Make the direct-current short circuit of high-voltage bidirectional traction power set that current quick after failure be protected to act rapidly to protect it when Ksd
The switching device of major loop is not damaged, therefore value is 1.1~1.2.
4. guard method described in accordance with the claim 3, it is characterised in that: the movement setting valve of the high current tripping presses Itq
=KtqIsd is configured；Safety factor Ktq value is 1.3~1.5；In Formulas I sd=KsdIly and Formulas I tq=Ktq
Meet Ily < Isd on the basis of Isd, wherein Ily is the movement setting valve of overcurrent protection in high-voltage bidirectional traction power set.
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 CN106921147A (en) | 2017-07-04 |
| CN106921147B true CN106921147B (en) | 2019-10-29 |
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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 |
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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 |
|---|
| 大连地铁直流牵引供电系统保护配置及整定研究;黄海浪;《城市轨道交通研究》;20130331(第3期);第93-96页 * |
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| CN106921147A (en) | 2017-07-04 |
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