CN107499189B - A kind of high-speed railway power supply network system and its guard method - Google Patents
A kind of high-speed railway power supply network system and its guard method Download PDFInfo
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- CN107499189B CN107499189B CN201710583642.2A CN201710583642A CN107499189B CN 107499189 B CN107499189 B CN 107499189B CN 201710583642 A CN201710583642 A CN 201710583642A CN 107499189 B CN107499189 B CN 107499189B
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- power supply
- protection
- impedance
- institute
- traction substation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of high-speed railway power supply network systems; including at least two traction substations; auto-transformer AT subregion institute between adjacent two traction substation is set; be arranged in traction substation and AT subregion between AT institute; and the connection traction substation, AT and AT subregion uplink and downlink Traction networks supply arm, the uplink feeder breaker 1DL and downlink feeder breaker 2DL of traction substation be each configured with the first impedance protection and the first overcurrent protective device；2 auto-transformers are equipped with set by AT; for being connected in parallel the disconnecting switch 1GK of 2 auto-transformers; two feeder breakers 3DL, 5DL and 4DL, the 6DL of the enter line side parallel connection of every auto-transformer are each configured with the second impedance protection and the second overcurrent protective device, are provided with electric segmentation between 2 feeder breakers of every auto-transformer connection and the contact point of uplink and downlink Traction networks supply arm.
Description
Technical field
The present invention relates to a kind of high-speed railway power supply network system and its guard methods.
Background technique
China express railway supply network at present provides independent feeder line open circuit by traction substation for uplink and downlink feeder line
Device, AT institute uplink and downlink feeder line respectively set a breaker, and set two self couplings and become mutual backup, in the realized uplink and downlink Traction networks of AT
Supply arm is in parallel.Four feeder breakers set by AT subregion, four auto-transformers, on the realized two sides supply arm of AT subregion
Downlink Traction networks supply arm is respectively in parallel and more Qu Gongneng.
But as China's high-speed rail interconnects networking, the passenger traffic volume is stepped up, and problem is following: AT institute to area, AT subregion institute
Section, when especially short trouble occurs for end, the short circuit current of feeding section and maximum of reflection to traction substation feeder breaker
Load current is very close.Especially high resistance ground when, impedance angle also no significant difference.The high-speed EMUs kind of drive is simultaneously
Hand over it is straight hand over Electric Drive, harmonic characterisitic is based on higher hamonic wave, and harmonic content is very low, can not carry out as Protection criteria
It extracts.So cause existing 2 subharmonic currents be latched or the synthesis harmonics restraint of 2,3,5 subharmonic as load current with it is short
The difference criterion of road electric current has been not suitable for.It can not be sentenced by the protective relaying device of traction substation by comprehensive harmonics restraint
It is lacked according to maximum load current is distinguished with short circuit current of feeding section reliability of relay protection and selectivity, relay fail or malfunction,
The event for influencing organization of rail transport occurs repeatedly in part busy trunk lines.
The key technical problems that this patent solves first is that being realized to AT institute to AT subregion institute section most using which kind of technology
Effective differentiation of big load current and short circuit current of feeding section, it is ensured that protective relaying device is reliable, sensitively cuts off short trouble.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State a kind of high-speed railway power supply network system and its guard method of problem.
As the one aspect of the embodiment of the present invention, it is related to a kind of high-speed railway power supply network system, including at least two
Traction substation, is arranged in the auto-transformer AT subregion institute between adjacent two traction substation, setting in traction substation and
AT subregion between AT institute, and the connection traction substation, AT institute and AT subregion uplink and downlink Traction networks power
Arm, the traction substation are provided with uplink feeder breaker 1DL and downlink feeder breaker 2DL, the uplink feeder line open circuit
Device 1DL and downlink feeder breaker 2DL are each configured with: power supply network system metallic earthing is short-circuit for identification and excision is led
Draw electric substation power supply the first impedance protection, for identification power supply network system overcurrent and cut off traction substation power supply
The first overcurrent protective device；
2 auto-transformers are equipped with set by the AT, for being connected in parallel the disconnecting switch 1GK of 2 auto-transformers, often
The enter line side of platform auto-transformer is parallel with two feeder breaker 3DL, 5DL and 4DL, 6DL, what every auto-transformer connected
It is provided with electric segmentation between 2 feeder breakers and the contact point of uplink and downlink Traction networks supply arm, the feeder breaker 3DL,
5DL, 4DL and 6DL are each configured with power supply network system metallic earthing short circuit for identification and cut off AT is powered second
Impedance protection and for identification power supply network system overcurrent simultaneously cut off the second overcurrent protective device that AT is powered.
In one embodiment, the uplink feeder breaker 1DL and downlink feeder breaker 2DL are each configured with identification
The short circuit of power supply network system high resistant or overload and the third impedance protection for cutting off traction substation power supply.
In one embodiment, 4 auto-transformers are equipped with set by the AT subregion, are separately positioned on adjacent two traction and become
Feeder breaker 7DL, 8DL, 9DL and 10DL of the uplink and downlink Traction networks supply arm of electric institute side, for being connected in parallel uplink and downlink
Disconnecting switch 3GK, 5GK of Traction networks supply arm, and the disconnecting switch for getting over area's connection uplink and downlink Traction networks supply arm
2GK；The AT subregion feeder breaker 7DL, 8DL, 9DL and 10DL be each configured with identification power supply network system metal connect
Ground short circuit simultaneously cuts off the 4th impedance protection that AT subregion powered, the short circuit of identification power supply network system high resistant or overload simultaneously
The 5th impedance protection powered of excision AT subregion and for identification power supply network system overcurrent simultaneously cut off AT subregion institute
The third overcurrent protective device of power supply.
As the other side of the embodiment of the present invention, it is related to a kind of high-speed railway supply network guard method, comprising:
Execution judges whether the first impedance protection measured value is less than default L1 sections of setting valve Z1ZDThe step of:
L1 sections of setting valve Z are preset when the first impedance protection measured value of traction substation is less than1ZD, the first impedance protection is dynamic
Make, cutting traction substation power supply；
L1 sections of setting valve Z are preset when the first impedance protection measured value is greater than or equal to1ZDAnd it is less than and presets L2 sections of setting valves
Z'1ZD, act after the first impedance protection delay predetermined time, cutting traction substation power supply；
When the first overcurrent protection measured value of traction substation is greater than or equal to default setting valve ISS-zd, the first overcurrent protection
It is acted after delay predetermined time, cutting traction substation power supply；
When AT the second impedance protection measured value be less than default setting valve ZAT-ZD, the movement of the second impedance protection, cutting AT
The power supply of institute's auto-transformer；
Execution judges whether the second overcurrent protection measured value is greater than or equal to default setting valve IAT-ZDThe step of:
When AT the second overcurrent protection measured value be greater than or equal to default setting valve IAT-ZD, the second overcurrent protection movement,
Cut off the power supply of AT institute's auto-transformer.
In one embodiment, the high-speed railway supply network guard method further include:
Execution judges whether third impedance protection measured value is less than default setting valve Z2ZDThe step of:
When the third impedance protection measured value of traction substation is greater than or equal to default setting valve Z2ZD, third impedance protection
It is failure to actuate；
When the third impedance protection measured value of traction substation is less than default setting valve Z2ZD, and AT the second impedance protect
Shield and the second overcurrent protection are failure to actuate, the movement of third impedance protection, cutting traction substation power supply.
In one embodiment, the high-speed railway supply network guard method further include:
When high-speed railway supply network over-zone feeding:
When the second impedance protection measured value of AT institute b is less than default setting valve Z3ZD, the movement of the second impedance protection, cutting AT
The power supply of institute's auto-transformer；
When the second overcurrent protection measured value of AT institute b is greater than or equal to default setting valve I'AT-zd, the second overcurrent protection is dynamic
Make, cutting AT institute's auto-transformer power supply；
When AT subregion the 4th impedance protection measured value be less than preset L3 sections of setting valve Z3ZD, the movement of the 4th impedance protection,
Cut off traction substation power supply；
L3 sections of setting valve Z are preset when the 4th impedance protection measured value is greater than or equal to3ZD, and be less than and preset L4 sections of setting valves
Z4ZD, act after the 4th impedance protection delay predetermined time, cutting traction substation power supply；
When AT subregion third overcurrent protection measured value be greater than or equal to default setting valve I3ZD, third overcurrent protection prolongs
When the predetermined time after act, cutting traction substation power supply.
In one embodiment, the high-speed railway supply network guard method, further includes:
When AT subregion the 5th impedance protection measured value be less than default setting valve Z5ZD, and the second impedance protection of AT institute b
It is failure to actuate with the second overcurrent protection, the movement of the 5th impedance protection, cutting traction substation power supply.
The present invention has the advantage that compared with prior art
1) high-speed railway power supply network system proposed by the present invention changes load current and short circuit current in supply network
Distribution path, and then can realize effective differentiation to maximum load current and short circuit current of feeding section, it is ensured that relay protection dress
Set it is reliable, sensitively cut off short trouble.Existing protective relaying device is overcome in load current and supply arm end short circuit electricity
When flowing close, the defect of fault identification cannot achieve.
2) present invention is using traction power supply net supply arm sectionalised protection as guiding theory.When traction substation to AT institute section
When there is short circuit or overload, acted set on the impedance protection of traction substation and overcurrent protection.When AT institute to area, AT subregion institute
There is short circuit or when overload in section, acts set on the impedance protection of AT institute or overcurrent protection.With existing relay protection only it is single according to
It is compared by traction substation feeder line setting impedance protection with overcurrent protection, further improves the reliability and selection of protective device
Property.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of high-speed railway power supply network system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of high-speed railway power supply network system in the prior art；
Fig. 3 is circuit loop schematic diagram when short circuit occurs for high-speed railway power supply network system end shown in Fig. 2；
Fig. 4 is circuit loop schematic diagram when short circuit occurs for high-speed railway power supply network system end shown in Fig. 1 of the present invention；
Fig. 5 is protection act flow chart when high-speed railway power supply network system protection shown in Fig. 1 of the present invention operates normally；
Protection philosophy block diagram when the protection of high-speed railway power supply network system shown in the Fig. 1 of the present invention of the position Fig. 6 operates normally.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
In order to solve the problems in the existing technology, the embodiment of the present invention provides a kind of high-speed railway power supply network system
And its guard method.
The present invention proposes a kind of high-speed railway power supply network system, and compared with existing power supply network system, the present invention is proposed
Power supply network system based on protective relaying device sectionalised protection thought design, change load current and short circuit current and supplying
The distribution path of electric network, so that protective relaying device realizes the differentiation of maximum load current and short circuit current of feeding section.Simultaneously
It is proposed and the matched guard method of the power supply network system, to ensure that protective relaying device is reliable, sensitively cut off short trouble.
Embodiment one:
Shown in referring to Fig.1, the embodiment of the present invention provides a kind of high-speed railway power supply network system, including at least two tractions
The auto-transformer AT subregion institute between adjacent two traction substation is arranged in electric substation, and setting is in traction substation and AT points
Area between AT institute, and the connection traction substation, AT and AT subregion uplink and downlink Traction networks supply arm, institute
It states traction substation and is provided with uplink feeder breaker 1DL and downlink feeder breaker 2DL, the uplink feeder breaker 1DL
Be each configured with downlink feeder breaker 2DL: power supply network system metallic earthing is short-circuit for identification and cuts off traction change
The first impedance protection for being powered of electricity power supply network system overcurrent and cuts off the of traction substation power supply for identification
One overcurrent protective device；
First impedance protection is less than default L1 sections of adjustings for the first impedance protection measured value when traction substation
Value Z1ZD, cutting traction substation power supply；L1 sections of setting valve Z are preset when the first impedance protection measured value is greater than or equal to1ZDAnd it is small
In default L2 sections of setting valve Z'1ZD, act after delay predetermined time, cutting traction substation power supply；
First overcurrent protective device, it is whole more than or equal to presetting for the first overcurrent protection measured value when traction substation
Definite value ISS-zd, act after the first overcurrent protection delay predetermined time, cutting traction substation power supply；
2 auto-transformers are equipped with set by the AT, for being connected in parallel the disconnecting switch 1GK of 2 auto-transformers, often
The enter line side of platform auto-transformer is parallel with two feeder breaker 3DL, 5DL and 4DL, 6DL, what every auto-transformer connected
It is provided with electric segmentation between 2 feeder breakers and the contact point of uplink and downlink Traction networks supply arm, the feeder breaker 3DL,
5DL, 4DL and 6DL are each configured with power supply network system metallic earthing short circuit for identification and cut off AT is powered second
Impedance protection and for identification power supply network system overcurrent simultaneously cut off the second overcurrent protective device that AT is powered；
Second impedance protection, for when AT institute the second impedance protection measured value be less than preset setting valve ZAT-ZD, cut
Disconnected AT institute's auto-transformer power supply；
Second overcurrent protective device, for when AT institute the second overcurrent protection measured value be greater than or equal to preset setting valve
IAT-ZD, cutting AT institute's auto-transformer power supply.
In one embodiment, the uplink feeder breaker 1DL and downlink feeder breaker 2DL are each configured with identification
The short circuit of power supply network system high resistant or overload and the third impedance protection for cutting off traction substation power supply.
The third impedance protection is less than default adjusting for the third impedance protection measured value when traction substation
Value Z2ZD, and AT the second impedance protection and the second overcurrent protection be failure to actuate, third impedance protection movement, cutting traction power transformation
It is powered.
In one embodiment, 4 auto-transformers are equipped with set by the AT subregion, are separately positioned on adjacent two traction and become
Feeder breaker 7DL, 8DL, 9DL and 10DL of the uplink and downlink Traction networks supply arm of electric institute side, for being connected in parallel uplink and downlink
Disconnecting switch 3GK, 5GK of Traction networks supply arm, and the disconnecting switch for getting over area's connection uplink and downlink Traction networks supply arm
2GK；The AT subregion feeder breaker 7DL, 8DL, 9DL and 10DL be each configured with identification power supply network system metal connect
Ground short circuit simultaneously cuts off the 4th impedance protection that AT subregion powered, the short circuit of identification power supply network system high resistant or overload simultaneously
The 5th impedance protection powered of excision AT subregion and for identification power supply network system overcurrent simultaneously cut off AT subregion institute
The third overcurrent protective device of power supply.
4th impedance protection is used to be less than default L3 sections of setting valves when the 4th impedance protection measured value of AT subregion institute
Z3ZD, the movement of the 4th impedance protection, cutting traction substation power supply；For being greater than or equal in advance when the 4th impedance protection measured value
If L3 sections of setting valve Z3ZD, and be less than and preset L4 sections of setting valve Z4ZD, act after the 4th impedance protection delay predetermined time, cutting is led
Draw electric substation's power supply；
The third overcurrent protective device, for when AT subregion institute third overcurrent protection measured value be greater than or equal to preset
Setting valve I3ZD, act after third overcurrent protection delay predetermined time, cutting traction substation power supply.
5th impedance protection, for when AT subregion institute the 5th impedance protection measured value be less than preset setting valve
Z5ZD, and the second impedance protection of AT institute b and the second overcurrent protection are failure to actuate, traction substation is cut off in the movement of the 5th impedance protection
Power supply.
In the embodiment of the present invention, the high-speed railway power supply network system, comprising: set uplink and downlink feeder breaker two are adjacent
Traction substation, if the AT institute of four feeder breakers, two auto-transformers and a disconnecting switch, if four feeder line open circuits
The AT subregion institute of device, four auto-transformers and three disconnecting switch, and be set to and be located at the uplink and downlink Traction networks power supply nearby of AT institute
The electricity segmentation of arm collectively constitutes, referring to Fig. 1.Two sets of impedance protections are configured in traction substation 1DL and 2DL and a set of overcurrent is protected
Shield configures a set of impedance protection and a set of overcurrent protection in AT institute 3DL, 4DL, 5DL and 6DL, in AT subregion institute 7DL, 8DL, 9DL
With two sets of impedance protections of configuration and a set of overcurrent protection at 10DL.
Referring to shown in Fig. 2 and Fig. 3, high-speed railway power supply network system in the prior art, AT auto-transformer
Place is only provided with 1 feeder breaker, referring to shown in Fig. 3, when uplink Traction networks AT institute's short circuit occurred to AT subregion, and electric current
Circuit is as shown in the figure: at this point, Id=I1+I3+I4=I1+I2 is far longer than I3, wherein Id is uplink Traction networks short circuit current, I1
To flow through uplink Traction networks supply arm traction substation to AT institute section electric current, I2 is to flow through the traction of downlink Traction networks supply arm to become
Electric institute is to AT institute section electric current, and I3 is the electric current for flowing through AT institute breaker, and I4 is the electric current for flowing through AT subregion institute breaker, by with
Upper equation can be seen that the electric current for flowing through AT institute breaker less than short circuit current, and be variation.When AT institute to AT subregion institute
Between when having load current (EMU electric current), current loop is distributed special as short circuit current according to high-speed railway load current
Point, when maximum load current and AT institute to subregion institute between short circuit current of feeding section it is close when, it is difficult to maximum load current with
AT institute to short circuit current of feeding section between subregion institute distinguishes.
The corresponding operating condition of meaning maximum load current is to have 4~6 EMU in supply arm in the embodiment of the present invention,
EMU load is uniformly distributed along supply arm.In the embodiment of the present invention, it is located under the structure proposed by the present invention referring to Fig. 4
AT to AT subregion institute section electric current have to flow through AT breaker, at this point, Id=I1+I2=IDL5+IDL6, that is, work as AT
Institute is to the short circuit occurred of AT subregion, and no matter short circuit occurs somewhere, to flow through the I of AT institute breakerDL5+IDL6The sum of electric current etc.
In short circuit current.And it is less than maximum load current, it so can be achieved to the effective of maximum load current and short circuit current of feeding section
It distinguishes.
Supply network proposed by the present invention, changes load current and short circuit current in the distribution path of supply network, into
And it can realize effective differentiation to maximum load current and short circuit current of feeding section, it is ensured that protective relaying device is reliable, sensitive
Cut off short trouble.
In the invention patent embodiment, first impedance protection, the second impedance protection, third impedance protection
Device, the 4th impedance protection, the 5th impedance protection, the first overcurrent protective device, the second overcurrent protective device and
Three overcurrent protective devices are the conventional equipment used in the art.
Shown in referring to Fig.1, the corresponding relay protection setting principle of the high-speed railway power supply network system of the embodiment of the present invention
It is as follows:
It is responsible for identifying and cutting off generation in traction substation to AT institute set on the first impedance protection of traction substation A
Section metallic earthing short circuit, and as AT to AT subregion institute section metallic earthing short circuit back-up protection.It is set to
The second impedance protection of traction substation A is responsible for ground fault and mistake of the identification generation in traction substation to AT institute section
Load condition.The first overcurrent protective device set on traction substation is filled as the first impedance protection and the second impedance protection
The back-up protection set.
Set on the third impedance protection and the second overcurrent protective device of AT institute a, for protecting AT institute a when normal operation
To AT subregion institute overall length, when traction substation A off-the-line, for protecting AT institute a to traction substation A overall length.Set on the of AT institute b
Three impedance protections and the second overcurrent protective device, for protecting AT institute b to AT subregion institute overall length when normal operation, traction becomes
When electric institute's B off-the-line, for protecting AT institute b to traction substation B overall length.
AT subregion the protection area Jin Yue when put into.By taking traction substation B off-the-line as an example, set on AT subregion the 4th
Impedance protection be responsible for identifying and cut off occur it is short-circuit in the metallic earthing of AT subregion institute to AT institute b, and extremely as AT institute b
The back-up protection of the metallic earthing short circuit of off-the-line traction substation B section.Set on AT subregion the 5th impedance protection
It is responsible for identification to occur in AT institute b to the ground fault and overload operating condition of off-the-line traction substation B section.Set on AT subregion
Back-up protection of the third overcurrent protective device as the 4th impedance protection and the 5th impedance protection.
Embodiment two:
Shown in referring to figure 5 and figure 6, the embodiment of the present invention provides a kind of high-speed railway supply network guard method, comprising:
Execution judges the step of whether the first impedance protection measured value of traction substation is less than default L1 sections of setting valve:
L1 sections of setting valves are preset when the first impedance protection measured value is less than, the movement of the first impedance protection, cutting traction power transformation
It is powered；
L1 sections of setting valves are preset when the first impedance protection measured value is greater than or equal to, execution judges that the first impedance protection measures
Whether value is less than the step of presetting L2 sections of setting valves:
L2 sections of setting valves are preset when the first impedance protection measured value is less than, are moved after the first impedance protection delay predetermined time
Make, cutting traction substation power supply；
L2 sections of setting valves are preset when the first impedance protection measured value is greater than or equal to, the first impedance protection is failure to actuate；
Execution judges the step of whether the first overcurrent protection measured value of traction substation is greater than or equal to default setting valve:
Setting valve is preset when the first overcurrent protection measured value is greater than or equal to, is moved after the first overcurrent protection delay predetermined time
Make, cutting traction substation power supply；
When the first overcurrent protection measured value is less than default setting valve, the first overcurrent protection is failure to actuate；
Execute judge AT the second impedance protection measured value the step of whether being less than default setting valve:
When the second impedance protection measured value is less than default setting valve, AT institute self coupling transformation is cut off in the movement of the second impedance protection
Device power supply；
When the second impedance protection measured value is greater than or equal to default setting valve, the second impedance protection is failure to actuate；
Execution judges the step of whether the second overcurrent protection measured value is greater than or equal to default setting valve:
When the second overcurrent protection measured value is more than or equal to default setting valve, the second overcurrent protection movement, cutting AT institute is certainly
Coupling transformer-supplied；
When the second overcurrent protection measured value is less than default setting valve, the second overcurrent protection is failure to actuate.
In one embodiment, it can be, the high-speed railway supply network guard method, further includes: execute judgement
The step of whether the third impedance protection measured value of traction substation is less than default setting valve:
When third impedance protection measured value is greater than or equal to default setting valve, third impedance protection is failure to actuate；
When third impedance protection measured value is less than default setting valve, delay predetermined time judge AT the second impedance protection
Whether acted with the second overcurrent protection:
When AT the second impedance protection and/or the second overcurrent protection movement, third impedance protection is failure to actuate；
When AT the second impedance protection and the second overcurrent protection be failure to actuate, third impedance protection movement, cutting traction become
Electricity is powered.
In one embodiment, it can be, the high-speed railway supply network guard method, further includes:
When high-speed railway supply network over-zone feeding, execute judge AT subregion the 4th impedance protection measured value whether
The step of less than default L3 sections of setting valve:
L3 sections of setting valves are preset when the 4th impedance protection measured value is less than, the movement of the 4th impedance protection, cutting traction power transformation
It is powered；
L3 sections of setting valves are preset when the 4th impedance protection measured value is greater than or equal to, execution judges that the 4th impedance protection measures
Whether value is less than the step of presetting L4 sections of setting valves:
L4 sections of setting valves are preset when the 4th impedance protection measured value is less than, are moved after the 4th impedance protection delay predetermined time
Make, cutting traction substation power supply；
L4 sections of setting valves are preset when the 4th impedance protection measured value is greater than or equal to, the 4th impedance protection is failure to actuate；
Execution judges the step of whether the third overcurrent protection measured value of traction substation is greater than or equal to default setting valve:
Setting valve is preset when third overcurrent protection measured value is greater than or equal to, is moved after third overcurrent protection delay predetermined time
Make, cutting traction substation power supply；
When third overcurrent protection measured value is less than default setting valve, third overcurrent protection is failure to actuate；
Execution judges the step of whether the second impedance protection measured value of AT institute b is less than default setting valve:
When the second impedance protection measured value is less than default setting valve, AT institute self coupling transformation is cut off in the movement of the second impedance protection
Device power supply；
When the second impedance protection measured value is greater than or equal to default setting valve, the second impedance protection is failure to actuate；
Execution judges the step of whether the second overcurrent protection measured value is greater than or equal to default setting valve:
When the second overcurrent protection measured value is more than or equal to default setting valve, the second overcurrent protection movement, cutting AT institute is certainly
Coupling transformer-supplied；
When the second overcurrent protection measured value is less than default setting valve, the second overcurrent protection is failure to actuate.
In one embodiment, it can be, the high-speed railway supply network guard method, further includes: execute judgement
The step of whether the 5th impedance protection measured value of traction substation is less than default setting valve:
When the 5th impedance protection measured value is greater than or equal to default setting valve, the 5th impedance protection is failure to actuate；
When the 5th impedance protection measured value is less than default setting valve, delay predetermined time judges that the second impedance of AT institute b is protected
Whether shield and the second overcurrent protection act:
When the second impedance protection of AT institute b and/or the second overcurrent protection act, the 5th impedance protection is failure to actuate；
When the second impedance protection of AT institute b and the second overcurrent protection are failure to actuate, the 5th impedance protection movement, cutting traction becomes
Electricity is powered.
Power supply network system proposed by the present invention and relay protection setting principle corresponding with the power supply network system and side
Method is as follows:
1) accidental conditions relaying configuration and adjusting
1. traction substation
Traction substation sets two sets of impedance protections and a set of overcurrent protection.Shunt tripping function is arranged in feeder breaker IDL1 and IDL2
Energy.
Traction substation first set impedance protection is protected and is responsible for identifying and cutting off generation in traction substation to AT institute section
Metallic earthing short circuit, and as AT to AT subregion institute section metallic earthing short circuit back-up protection.Calculation method
It is as follows:
I sections of impedance, i.e., L1 sections of the supply arm of uplink and downlink Traction networks shown in Fig. 1 of impedance Z1ZD
X1ZD=Kk·ω·L1
Z1ZD=R1ZD+jX1ZD
T=0.1S
U in formulamin: traction substation bus minimum voltage
Kk: safety factor
IFmax: maximum load current of feeding section
θL: line impedance angle
II sections of impedance, i.e., L2 sections of the supply arm of uplink and downlink Traction networks shown in Fig. 1 of impedance Z '1ZD
X'1ZD=Kk·ω·(L1+L2)
Z'1ZD=R1ZD+jX'1ZD
T=0.3S (is specifically determined) in combination with engineering
U in formulamin: traction substation bus minimum voltage
Kk: safety factor
IFmax: maximum load current of feeding section
θL: line impedance angle
Second set of impedance protection of traction substation, protection traction substation to AT institute overall length.Setting principle is as follows:
Impedance protection resistance value is based on maximum load current of feeding section, load impedance angle and the adjusting of line impedance angle.Reactance
Value is adjusted by traction substation to AT institute overall length L1, and delay is arranged.When the short circuit of traction substation feeder breaker is arrived in reflection
When electric current and maximum load current are close, as failure occurs to be acted to AT subregion institute section by AT institute's protection for feed line in AT institute.Such as
Generation is acted after being delayed by traction substation protection for feed line in traction substation to AT institute section.Reactance value is by traction power transformation
Institute is to AT institute overall length L1 impedance setting value Z2ZDCalculation method is as follows:
X2ZD=Kk·ω·L1
Z2ZD=R2ZD+jX2ZD
T=0.3S (is specifically determined) in combination with engineering
In formulaLoad impedance angle
Overcurrent protection considers safety factor adjusting by traction substation to AT institute section minimum short circuit current.Since AT is supplied
Electric mode impedance is the shape of a saddle, i.e. traction substation to AT institute's section and AT institute to AT subregion institute partial sector short circuit current weight
Folded, to avoid protection from robbing jump, setting delay is 0.3S.Traction substation is to AT institute section minimum short circuit current setting valve ISS-zdMeter
Calculation method is as follows:
ISS-zd=Kk·Id-AT-min
T=0.3S (is specifically determined) in combination with engineering
I in formulad-AT-min: occur in traction substation to the minimum short circuit current of AT institute section.
2. AT institute
Impedance protection and overcurrent protection set by AT, protection AT institute to AT subregion institute overall length.Feeder breaker IDL5 and IDL6
Shunt tripping function is set.Setting principle is as follows:
Impedance protection, resistance value are based on AT institute to AT subregion institute section maximum load current, load impedance angle and route and hinder
Anti- angle adjusting.Reactance value is adjusted by AT institute to AT subregion institute overall length L2.AT institute impedance setting value ZAT-ZDCalculation method is as follows:
XAT-ZD=Kk·ω·L2
ZAT-ZD=RAT-ZD+jXAT-ZD
T=0.1S
U in formulaAT-min: AT institute bus minimum voltage
IF-AT-max: AT institute to AT subregion institute maximum load current
Overcurrent protection considers safety factor adjusting, AT institute to AT subregion institute by the minimum short circuit current of AT institute to AT subregion institute
Minimum short circuit current setting valve IAT-ZDCalculation method is as follows:
IAT-ZD=Kk·Idmin
T=0.1S
In formula: Id-min: traction substation to AT subregion institute section minimum short circuit current
2) area's operating condition relaying configuration and adjusting are got over
By taking traction substation B off-the-line as an example.
1. traction substation
Traction substation A protection setting and definite value are identical as accidental conditions.
2. AT institute
AT institute a protection setting and definite value are identical as accidental conditions.
AT institute b protects AT institute b to off-the-line traction substation B overall length under more area's operating condition.Setting principle is as follows:
Impedance protection, resistance value are based on AT institute b to off-the-line traction substation B section maximum load current, load impedance angle
And line impedance angle adjusting.Reactance value is adjusted by AT institute b to off-the-line traction substation B overall length L3.Impedance setting value Z3ZDCalculating side
Method is as follows:
X3ZD=Kk·ω·L3
Z3ZD=R3ZD+jX3ZD
T=0.1S
U in formulaAT-min: AT institute bus minimum voltage
IF-AT-max: AT institute b to off-the-line traction substation B maximum load current
Overcurrent protection considers safety factor adjusting, short circuit electricity by AT institute b to off-the-line traction substation B minimum short circuit current
Flow setting valve I'AT-zdCalculation method is as follows:
I'AT-zd=Kk·Idmin
T=0.1S
In formula: Id-min: AT institute b to off-the-line traction substation B minimum short circuit current
3. AT subregion institute
AT subregion institute's impedance protection and overcurrent protection are put into more area's operating condition, AT institute b to off-the-line traction substation B overall length L3
Impedance setting value Z3ZD, AT subregion institute is to AT institute b overall length L4 impedance setting value Z4ZD、Z5ZDAnd AT subregion institute third overcurrent protection
Device setting valve I3ZDProtection philosophy and calculation method can refer to traction substation, and details are not described herein.
In the embodiment of the present invention, the setting of actuation time and delay time can be configured according to specific running environment,
Time in the embodiment of the present invention can reset according to carrying out practically operating condition.
3) protection act mode
Under normal operating mode, when metallic short circuit failure occurs for traction substation to AT institute's section, it is set to traction and becomes
The first set impedance protection of electric institute acts.When there is metallic short circuit failure to AT subregion institute section in AT, set on AT
Impedance protection or overcurrent protection movement, the first set impedance protection set on traction substation is as its standby.
When high resistant short trouble occurs for traction substation to AT institute's section or when overload, by be set to traction substation the
Two sets of impedance protections and overcurrent protection act after being delayed.When high resistant short circuit or overload occurs in AT institute to AT subregion institute section
When, set on AT impedance protection or overcurrent protection movement.
High-speed railway power supply network system of the present invention under normal operating mode, respectively protect by uplink and downlink Traction networks supply arm
The method division of labor is as follows:
The present invention proposes a kind of high-speed railway power supply network system, and compared with existing power supply network system, the present invention is proposed
Power supply network system based on protective relaying device sectionalised protection thought design, change load current and short circuit current and supplying
The distribution path of electric network, so that protective relaying device realizes the differentiation of maximum load current and short circuit current of feeding section.Simultaneously
It is proposed and the matched guard method of the power supply network system, to ensure that protective relaying device is reliable, sensitively cut off short trouble.
Compared with prior art, it in the case where the Large scale construction of high-speed railway and high-speed EMUs are a large amount of online, can effectively realize
The examination of short circuit current and load current, it is ensured that protective relaying device reliably cuts off short trouble.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (7)
1. a kind of high-speed railway power supply network system, including at least two traction substations are arranged in adjacent two traction substation
Between auto-transformer AT subregion institute, be arranged in traction substation and AT subregion between AT institute, and connection described in lead
Draw electric substation, AT and AT subregion uplink and downlink Traction networks supply arm, which is characterized in that the traction substation is provided with
Uplink feeder breaker 1DL and downlink feeder breaker 2DL, the uplink feeder breaker 1DL and downlink feeder breaker 2DL
Be each equipped with: power supply network system metallic earthing is short-circuit for identification and cuts off the first impedance protection of traction substation power supply
Device, for identification power supply network system overcurrent and cut off traction substation power supply the first overcurrent protective device；
2 auto-transformers are equipped with set by the AT, for being connected in parallel the disconnecting switch 1GK of 2 auto-transformers, every certainly
The enter line side of coupling transformer is parallel with two feeder breaker 3DL, 5DL and 4DL, 6DL, and 2 of the connection of every auto-transformer
It is provided with electric segmentation between feeder breaker and the contact point of uplink and downlink Traction networks supply arm, the feeder breaker 3DL,
5DL, 4DL and 6DL are each configured with power supply network system metallic earthing short circuit for identification and cut off AT is powered second
Impedance protection and for identification power supply network system overcurrent simultaneously cut off the second overcurrent protective device that AT is powered.
2. high-speed railway power supply network system as described in claim 1, which is characterized in that the uplink feeder breaker 1DL
The short circuit of identification power supply network system high resistant or overload are each configured with downlink feeder breaker 2DL and cut off traction substation
The third impedance protection of power supply.
3. high-speed railway power supply network system as claimed in claim 1 or 2, which is characterized in that be equipped with 4 set by the AT subregion
The feeder breaker 7DL and 9DL of the uplink Traction networks supply arm of adjacent two traction substation side is arranged in platform auto-transformer,
The feeder breaker 8DL and 10DL of the downlink Traction networks supply arm of adjacent two traction substation side are set, for being connected in parallel
Disconnecting switch 3GK, 5GK of uplink and downlink Traction networks supply arm, and for get over area connection uplink and downlink Traction networks supply arm every
It leaves and closes 2GK；The AT subregion feeder breaker 7DL, 8DL, 9DL and 10DL be each configured with identification power supply network system
Metallic ground short circuit simultaneously cuts off the 4th impedance protection, the short circuit of identification power supply network system high resistant or mistake that AT subregion is powered
Load simultaneously cuts off the 5th impedance protection that AT subregion is powered and for identification power supply network system overcurrent and cuts off AT
The third overcurrent protective device that subregion is powered.
4. a kind of high-speed railway supply network of high-speed railway power supply network system as described in any one of claims 1-3 is protected
Method characterized by comprising
Execution judges whether the first impedance protection measured value is less than default L1 sections of setting valve Z1ZDThe step of:
L1 sections of setting valve Z are preset when the first impedance protection measured value of traction substation is less than1ZD, the first impedance protection movement, cut
Disconnected traction substation power supply；
L1 sections of setting valve Z are preset when the first impedance protection measured value is greater than or equal to1ZDAnd it is less than and presets L2 sections of setting valve Z'1ZD,
It is acted after first impedance protection delay predetermined time, cutting traction substation power supply；
When the first overcurrent protection measured value of traction substation is greater than or equal to default setting valve ISS-zd, the first overcurrent protection delay
It is acted after predetermined time, cutting traction substation power supply；
When AT the second impedance protection measured value be less than default setting valve ZAT-ZD, the movement of the second impedance protection, cutting AT institute is certainly
Coupling transformer-supplied；
Execution judges whether the second overcurrent protection measured value is greater than or equal to default setting valve IAT-ZDThe step of:
When AT the second overcurrent protection measured value be greater than or equal to default setting valve IAT-ZD, the second overcurrent protection movement, cutting
The power supply of AT institute's auto-transformer.
5. high-speed railway supply network guard method as claimed in claim 4, which is characterized in that further include:
Execution judges whether third impedance protection measured value is less than default setting valve Z2ZDThe step of:
When the third impedance protection measured value of traction substation is greater than or equal to default setting valve Z2ZD, third impedance protection is motionless
Make；
When the third impedance protection measured value of traction substation is less than default setting valve Z2ZD, and AT the second impedance protection and
Second overcurrent protection is failure to actuate, the movement of third impedance protection, cutting traction substation power supply.
6. high-speed railway supply network guard method as claimed in claim 5, which is characterized in that further include:
When high-speed railway supply network over-zone feeding:
When the second impedance protection measured value of AT institute b is less than default setting valve Z3ZD, the movement of the second impedance protection, cutting AT institute is certainly
Coupling transformer-supplied；
When the second overcurrent protection measured value of AT institute b is greater than or equal to default setting valve I'AT-zd, the second overcurrent protection movement, cut
Disconnected AT institute's auto-transformer power supply；
When AT subregion the 4th impedance protection measured value be less than preset L3 sections of setting valve Z3ZD, the movement of the 4th impedance protection, cutting
Traction substation power supply；
L3 sections of setting valve Z are preset when the 4th impedance protection measured value is greater than or equal to3ZD, and be less than and preset L4 sections of setting valve Z4ZD,
It is acted after 4th impedance protection delay predetermined time, cutting traction substation power supply；
When AT subregion third overcurrent protection measured value be greater than or equal to default setting valve I3ZD, third overcurrent protection delay is in advance
It is acted after fixing time, cutting traction substation power supply.
7. high-speed railway supply network guard method as claimed in claim 6, which is characterized in that further include:
When AT subregion the 5th impedance protection measured value be less than default setting valve Z5ZD, and the second impedance protection of AT institute b and
Two overcurrent protections are failure to actuate, the movement of the 5th impedance protection, cutting traction substation power supply.
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| CN107425510B (en) * | 2017-09-15 | 2019-05-17 | 中铁第四勘察设计院集团有限公司 | A kind of high-speed railway power supply network system and its guard method |
| CN109552113B (en) * | 2018-11-29 | 2024-02-23 | 成都尚华电气有限公司 | Traction network segment protection jump system and method for preventing train from entering electroless section in electrified mode |
| CN109980644B (en) * | 2018-12-27 | 2021-12-10 | 中铁电气化局集团有限公司 | Harmonic suppression system for power supply used for electrified railway traction substation |
| CN113036733B (en) * | 2020-09-21 | 2022-11-22 | 西南交通大学 | Relay protection method for traction network power supply arm based on directional current element |
| CN113022389B (en) * | 2020-09-21 | 2022-11-29 | 西南交通大学 | Relay protection method for traction network power supply arm based on directional impedance element |
| CN113991618B (en) * | 2021-09-30 | 2023-03-24 | 国电南瑞科技股份有限公司 | Multi-parameter self-adaptive gamma-shaped characteristic traction network feeder distance protection method and device |
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