CN209267164U - A kind of remote backup protection system preventing substation's deflagration accident - Google Patents
A kind of remote backup protection system preventing substation's deflagration accident Download PDFInfo
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- CN209267164U CN209267164U CN201920284484.5U CN201920284484U CN209267164U CN 209267164 U CN209267164 U CN 209267164U CN 201920284484 U CN201920284484 U CN 201920284484U CN 209267164 U CN209267164 U CN 209267164U
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Abstract
The utility model embodiment discloses a kind of remote backup protection system for preventing substation's deflagration accident; utilize the remote emergency function of distance, zero-sequenceprotection in substation; by original voltage circuit system and in different voltages grade line system increase distance, zero-sequenceprotection extended segment; the remote back-up protection range that adjacent whole transformer station is brought into this system prevents substation when because failure causes Control protection system to be paralysed because deflagration accident occurs after long-time short trouble.
Description
Technical field
The utility model embodiment is related to Relay Protection Technology in Power System field, and in particular to one kind prevents substation quick-fried
The remote backup protection system of combustion accident.
Background technique
The zero-sequence current protection that the distance protection and zero sequence power direction element being made of impedor are constituted, as electric power
System secondary capital equipment (to it is direct participate in power generation, transmission of electricity, power transformation, distribution primary equipment controlled, protected, measured,
The automation low-voltage equipment of adjusting etc., referred to as secondary device), it is obtained in existing 110kV and the above AC power line Lu Shangyi
It is widely used.Existing distance and zero-sequenceprotection, when transmission line of electricity breaks down, can be realized full line, (cooperation high frequency is received
Signalling machine) without time limit (rapidity) and selectivity reliably cut off and remove faulty line, also can be used as the close of transmission line of electricity
The remote back-up protection of standby and same voltage class adjacent lines plays indispensable work for the safe operation of transmission line of electricity
With.
Substation occurs deflagration accident and happens occasionally, and reason has following several: (1) main transformer (main transformer) mesolow side
Near terminal fault；(2) fault point high pressure seals in direct current system, or because failure makes battery floating charge disappear, and after battery aging not
Maintenance in time causes DC power supply damage to disappear, and Substation control protection system is made to paralyse completely, and system is protected in the control by itself
System can not eliminate failure；(3) distance with remote back-up function, zero-sequenceprotection, do not become adjacent substations
Depressor mesolow side near terminal fault point is included in the remote back-up protection range of oneself, makes the remote back-up protection function of distance, zero-sequenceprotection
It can fail, eventually lead to detonation after whole transformer station long-time short trouble.The control protective unit of electric system primary equipment
Power supply just come from direct current system battery, direct-flow storage battery is just at the heart equipment of electric system, once battery goes out to ask
Topic, entire station will just paralyse completely, and direct-flow storage battery installs nearly standby and still has the risk that failure high pressure seals in, therefore,
Installing remote standby indirectly just becomes a kind of ideal selection.For current electric system, the relaying configuration of transmission line of electricity
Seem quite perfect, there is main protection, nearly standby and remote back-up protection, but in fact all just for the route of same voltage class and
Setting.
Utility model content
For this purpose, the utility model embodiment provides a kind of remote backup protection system for preventing substation's deflagration accident, with solution
The Control protection system of certainly existing substation is easy that paralysis or failure occur because of failure, can not voluntarily eliminate failure, cause to become
The problem of deflagration accident, occurs for power station.
To achieve the goals above, the utility model embodiment provides the following technical solutions: one kind preventing substation's detonation
The remote backup protection system of accident, described device includes the first protective device, the second protective device and third protective device, described
Substation includes the first substation, the second substation, third substation and the 4th substation, and first substation, second become
Power station and third substation are sequentially connected by high-tension line, are provided with the first breaker in first substation, and described
The high-pressure side of two transforming plant main transformers is provided with the second breaker and third breaker being connected, and is arranged in the third substation
There is the 4th breaker, is provided with the first protective device, institute on the high-tension line that first breaker and the second breaker connect
Stating the first protective device includes four-part form distance protection device and five-part form zero-sequenceprotection device, the third breaker and the 4th open circuit
It is provided with the second protective device on the high-tension line of device connection, second protective device includes five-part form distance protection device and six
Segmentation zero-sequenceprotection device, the medium voltage side and low-pressure side of second transforming plant main transformer are respectively arranged with the 5th breaker and the 6th and break
Road device, the 5th breaker connect medium-voltage line, are provided with the 4th substation, the 4th substation on medium pressure route
It is inside provided with the 7th breaker, third protection is provided on the medium-voltage line that the 7th breaker is connect with the 5th open circuit and is filled
It sets, the third protective device includes four-part form distance protection device and five-part form zero-sequenceprotection device, the 6th breaker connection
There is low-voltage circuit.
Further, first protective device further include the first Phase Difference High Frequency Protection device and the first HF blocking zero sequence protection away from
From protector.
Further, second protective device further include the second Phase Difference High Frequency Protection device and the second HF blocking zero sequence protection away from
From protector.
Further, the voltage of the high-tension line is 220kV.
Further, the voltage of medium pressure route is 110kV.
Further, the voltage of the low-voltage circuit is 35kV.
The utility model embodiment has the advantages that
A kind of remote backup protection system for preventing substation's deflagration accident that the utility model embodiment proposes, utilizes power transformation
The remote emergency function of distance, zero-sequenceprotection in standing, by original voltage circuit system and in different voltages grade route
Adjacent whole transformer station, is brought into the remote back-up protection model of this system by the extended segment for increasing distance, zero-sequenceprotection in system
It encloses, prevents substation when because failure causes Control protection system to be paralysed because deflagration accident occurs after long-time short trouble.
Detailed description of the invention
It, below will be to reality in order to illustrate more clearly of the embodiments of the present invention or technical solution in the prior art
It applies mode or attached drawing needed to be used in the description of the prior art is briefly described.It should be evident that attached in being described below
Figure is only exemplary, for those of ordinary skill in the art, without creative efforts, can be with
It is extended according to the attached drawing of offer and obtains other implementation attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for
Those skilled in the art understands and reads, and is not intended to limit the utility model enforceable qualifications, therefore does not have technology
On essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the utility model institute energy
Under the effect of generation and the purpose that can reach, it should all still fall in the revealed technology contents of the utility model and obtain the model that can cover
In enclosing.
Fig. 1 is a kind of remote backup protection system for preventing substation's deflagration accident that the utility model embodiment 1 provides
Structural schematic diagram.
In figure: the first substation 1, the second substation 2, third substation 3, the 4th substation 4, the 5th substation 5, first
Protective device 6, the second protective device 7, third protective device 8, main transformer 21.
Specific embodiment
The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages and effect of the utility model easily, it is clear that described embodiment is
The utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the utility model protection
Range.
As shown in Figure 1, the present embodiment proposes a kind of remote backup protection system for preventing substation's deflagration accident.
Substation includes the first substation 1, the second substation 2, third substation 3 and the 4th substation 4, the first substation
1, the second substation 2 and third substation 3 are sequentially connected by high-tension line, and the voltage of high-tension line is 220kV, the present embodiment
In, third substation 3 is also connected with the 5th substation 5, and the first breaker DL1, the second substation 2 are provided in the first substation
The high-pressure side of main transformer 21 is provided with the second breaker DL2 and third breaker DL3 being connected, and is provided in third substation 3
4th breaker DL4.
The device includes the first protective device 6, the second protective device 7 and third protective device 8.
It is provided with the first protective device 6 on first breaker DL1 and the high-tension line XL1 of the second breaker DL2 connection, the
One protective device 6 includes the first Phase Difference High Frequency Protection device, the first HF blocking zero sequence protection distance protection device, four-part form distance protection device
With five-part form zero-sequenceprotection device.
It is provided with the second protective device 7 on third breaker DL3 and the high-tension line XL2 of the 4th breaker DL4 connection, the
Two protective devices 7 include the second Phase Difference High Frequency Protection device, the second HF blocking zero sequence protection distance protection device, five-part form distance protection device
With six segmentation zero-sequenceprotection devices.
The medium voltage side and low-pressure side of second substation, 2 main transformer 21 are respectively arranged with the 5th breaker DL5 and the 6th breaker
The voltage of DL6, the 5th breaker DL5 connection medium-voltage line XL3, medium-voltage line XL3 are 110kV, are provided on medium-voltage line XL3
4th substation 4 is provided with the 7th breaker DL7 in the 4th substation 4, and the 7th breaker DL7 is connect with the 5th breaker DL5
Medium-voltage line XL3 on be provided with third protective device 8, third protective device 8 includes four-part form distance protection device and five-part form
Zero-sequenceprotection device, the 6th breaker DL6 are connected with low-voltage circuit XL4, and the voltage of low-voltage circuit XL4 is 35kV.
In protection setting, the first breaker DL1 of the first substation is configured with the difference in the direction XL1 for existing substation
Carrier current protection, HF blocking zero sequence protection distance protection, three-stage distance protection and the zero-sequenceprotection of four-part form direction, wherein three sections of distance
It is the remote back-up protection of XL2 with four sections of zero sequence, setting is perfect；4th breaker DL4 of third substation 3 is configured with
Phase Difference High Frequency Protection, HF blocking zero sequence protection distance, three-stage distance and the zero-sequenceprotection of four-part form direction in the direction XL2, wherein away from
From three sections and four sections of zero sequence be XL1 remote back-up protection, setting be also it is perfect, the setting of above-mentioned two o'clock just for
220kV with voltage class line system, they have ignored 2 main transformer 21 of the second substation and 110kV as adjacent spaces,
Remote emergency function when 35kV side bus failure.
The remote backup protection system of the present embodiment, using distance, zero-sequenceprotection remote emergency function, by increase distance,
Bring adjacent whole transformer station into oneself remote back-up protection range in the extended segment of zero-sequenceprotection.Firstly, first is broken
Road device DL1 original three-stage distance protection and the zero-sequenceprotection of four-part form direction each extends over as five-part form distance protection and six sections
Formula zero-sequenceprotection, the 4th breaker DL4 original three-stage distance and the zero-sequenceprotection of four-part form direction extend to five-part form distance
Protection and six segmentation zero-sequenceprotections, by five sections, six sections of the distance protection of the first breaker DL1 and the 4th breaker DL4, zero sequence
Remote standby when five sections and six sections 110kV, 35kV side bus failures as adjacent second substation 2 of protection, when the second change
There is certain sensitivity when mesolow 110kV, 35kV side bus failure of 2 main transformer 21 of power station；Secondly, by 110kV route system
The 7th breaker DL7 of the 4th substation 4 of uniting adds four-part form distance protection device and five-part form zero-sequenceprotection in the direction route XL3
Device, by five sections of four sections of distance protection, the zero-sequenceprotection of the 7th breaker DL7 also as 2 main transformer 21 of adjacent the second substation-
Remote standby when 35kV side bus failure will have certain sensitivity when 35kV side bus failure；Finally, by the second substation
2 main transformer, 21 neutral ground, influences the configuration of zero-sequenceprotection.
After above 3 points are provided with, if 35kV (or 110kV) side bus near fault of 2 main transformer 21 of the second substation
When, if its Control protection system is paralysed completely, 1 first breaker DL1 of the first substation and the 4th breaker of third substation 3
Four sections, five sections, five sections of zero-sequenceprotection and six sections of DL4 distance protection also can delay tripping, the 7th breaker of the 4th substation 4
Four sections of DL7 distance protection, five sections also can delay tripping, so that entire second substation 2 is effectively isolated out the fortune charged
Row system prevents it because deflagration accident occurs after long-time short trouble.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want
Seek the range of protection.
Claims (6)
1. a kind of remote backup protection system for preventing substation's deflagration accident, which is characterized in that described device includes the first protection
Device, the second protective device and third protective device, the substation include the first substation, the second substation, third power transformation
It stands and the 4th substation, first substation, the second substation and third substation are sequentially connected by high-tension line, described
The first breaker is provided in first substation, the high-pressure side of second transforming plant main transformer is provided with the second open circuit being connected
Device and third breaker, the 4th breaker is provided in the third substation, and first breaker and the second breaker connect
The first protective device is provided on the high-tension line connect, first protective device includes four-part form distance protection device and five-part form
It is provided with the second protective device on the high-tension line of zero-sequenceprotection device, the third breaker and the connection of the 4th breaker, it is described
Second protective device includes five-part form distance protection device and six segmentation zero-sequenceprotection devices, the medium voltage side of second transforming plant main transformer
It is respectively arranged with the 5th breaker and the 6th breaker with low-pressure side, the 5th breaker connects medium-voltage line, medium pressure
It is provided with the 4th substation on route, the 7th breaker, the 7th breaker and the 5th are provided in the 4th substation
Be provided with third protective device on the medium-voltage line of open circuit connection, the third protective device include four-part form distance protection device and
Five-part form zero-sequenceprotection device, the 6th breaker are connected with low-voltage circuit.
2. a kind of remote backup protection system for preventing substation's deflagration accident according to claim 1, which is characterized in that institute
Stating the first protective device further includes the first Phase Difference High Frequency Protection device and the first HF blocking zero sequence protection distance protection device.
3. a kind of remote backup protection system for preventing substation's deflagration accident according to claim 1, which is characterized in that institute
Stating the second protective device further includes the second Phase Difference High Frequency Protection device and the second HF blocking zero sequence protection distance protection device.
4. a kind of remote backup protection system for preventing substation's deflagration accident according to claim 1, which is characterized in that institute
The voltage for stating high-tension line is 220kV.
5. a kind of remote backup protection system for preventing substation's deflagration accident according to claim 1, which is characterized in that institute
The voltage for stating medium-voltage line is 110kV.
6. a kind of remote backup protection system for preventing substation's deflagration accident according to claim 1, which is characterized in that institute
The voltage for stating low-voltage circuit is 35kV.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920284484.5U CN209267164U (en) | 2019-03-06 | 2019-03-06 | A kind of remote backup protection system preventing substation's deflagration accident |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920284484.5U CN209267164U (en) | 2019-03-06 | 2019-03-06 | A kind of remote backup protection system preventing substation's deflagration accident |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009886A (en) * | 2019-11-20 | 2020-04-14 | 金诗瑶 | Remote-set power protection method and device |
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2019
- 2019-03-06 CN CN201920284484.5U patent/CN209267164U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009886A (en) * | 2019-11-20 | 2020-04-14 | 金诗瑶 | Remote-set power protection method and device |
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