CN208062774U - A kind of main transformer equipment protection system - Google Patents
A kind of main transformer equipment protection system Download PDFInfo
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- CN208062774U CN208062774U CN201820067702.5U CN201820067702U CN208062774U CN 208062774 U CN208062774 U CN 208062774U CN 201820067702 U CN201820067702 U CN 201820067702U CN 208062774 U CN208062774 U CN 208062774U
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- main transformer
- current loop
- protection module
- low reactance
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Abstract
The utility model discloses a kind of main transformer equipment protection systems, including：Main transformer, protective device and current loop；Wherein, the protective device includes the main transformer protection module combined and low reactance protection module, and the current loop includes the first current loop and the second current loop；The main transformer protection module is connected by first current loop with the main transformer, and the low reactance protection module is connected by second current loop with the main transformer.By the system, it is capable of being protected to main transformer equipment for centralized integrated, reduces protection room screen position setting quantity, main transformer protection becomes concentrating from disperseing, and reduces cable connection quantity and cost of investment.The drawbacks of improving low reactance protective device list set configuration in the prior art simultaneously.
Description
Technical field：
The utility model is related to tranformer protection technical field more particularly to a kind of main transformer equipment protection systems.
Background technology：
In the load center region of large scale and high density, the principal contradiction of power network development is electrical structure tension and short circuit electricity
Flow horizontal is difficult to control.Power grid 500kV main transformer of transformer substation keeps its zero sequence electric generally by the way of neutral-point solid ground
Anti- to substantially reduce, it is more than three short circuit current to lead to the 220kV single-phase short circuit currents of part 500kV substations, or even close disconnected
The rupturing capacity of road device.Therefore, for limiting short-circuit current level, earthing mode is changed to neutrality by some enterprises by being directly grounded
Low reactance equipment ground of the point through certain resistance value.
However inventor has found in the process of implementing the utility model, and low reactance equipment has been installed additional really for neutral point
Main transformer, main transformer neutral point low reactance equipment protection system are separately provided with main transformer protection system, to
Protection room screen position setting quantity is increased, the construction investment of substation's construction is increased, in addition, the main transformer neutral point of addition
Low reactance equipment protection system makes cable connection quantity increase, and warning message is not easy to integrate.
Invention content：
The purpose of this utility model is to provide a kind of main transformer equipment protection systems, to solve the above-mentioned prior art
The problem of.
The utility model is implemented by following technical solution：
The utility model embodiment provides a kind of main transformer equipment protection system, including：
Main transformer, protective device and current loop；Wherein, the protective device includes the main transformer combined
Protection module and low reactance protection module, the current loop include the first current loop and the second current loop；The main transformer
Depressor protection module is connected by first current loop with the main transformer, and the low reactance protection module passes through described
Second current loop is connected with the main transformer.
Further, the system also includes input circuit is protected, low reactance guarantor is provided in the protection input circuit
Pressing plate is moved back in protective function throwing, and the low reactance defencive function throwing moves back pressing plate and is connected with the low reactance protection module.
Further, the system also includes output loop, trip(ping) circuit, the tripping are provided in the output loop
Circuit is connected with the low reactance protection module.
Further, the main transformer protection module and the low reactance protection module are arranged in same protection screen.
Further, the main transformer protection module protection function includes：Longitudinal difference protection divides side differential protection and failure
Component differential protection.
Further, the low reactance protection module defencive function includes：Overload protection and overcurrent protection.
Further, the system also includes data collection and processing module, the data collection and processing module and institute
State protective device, the transformer is communicatively coupled.
Further, the main transformer includes the high-pressure sides 550kV, 220KV medium voltage sides and 35KV low-pressure sides.
The advantages of the utility model：
The main transformer equipment protection system that the utility model embodiment provides, including：Main transformer, protective device and electricity
Flow back to road；Wherein, the protective device includes the main transformer protection module combined and low reactance protection module, described
Current loop includes the first current loop and the second current loop；The main transformer protection module is returned by first electric current
Road is connected with the main transformer, and the low reactance protection module passes through second current loop and the main transformer phase
Even.By the system, it is capable of being protected to main transformer equipment for centralized integrated, reduces protection room screen position setting number
Amount, main transformer protection become concentrating from disperseing, and reduce cable connection quantity and cost of investment.Improve the prior art simultaneously
The drawbacks of medium and small reactance protection list set configuration.
Description of the drawings：
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is existing transformer equipment protection system with drawing；
Fig. 2 is the main transformer equipment protection system structural schematic diagram that the utility model embodiment is provided；
Fig. 3 is that the main transformer equipment protection system that the utility model embodiment is provided matches drawing；
Fig. 4 is the current circuit connections figure that the utility model embodiment is provided；
Fig. 5 is the input circuit contact contact figure that the utility model embodiment is provided；
Fig. 6 is the output loop contact contact figure that the utility model embodiment is provided.
Specific implementation mode：
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The term used in the utility model embodiment is the purpose only merely for description specific embodiment, and is not intended to
Limit the utility model.The utility model embodiment and the "an" of singulative used in the attached claims,
" described " and "the" are also intended to including most forms, unless context clearly shows that other meanings.
First, description below is carried out to the noun that the utility model embodiment is related to.
Small reactor on neutral point, small reactor on neutral point are generally located on the compensation equipment of high-tension line --- in high voltage reactor,
High voltage reactor is star connection A, B, C parallel three phase, concatenates a low reactance again at the neutral point of star-star connection, that is, is formed
High voltage reactor is grounded through small reactor on neutral point.
Main transformer protection refers to the various protections carried out to the main transformer equipment in substation.
Fig. 1 is that transformer equipment protects system with drawing in the prior art, as shown in Figure 1, neutral in 500kV main transformers
Point side installs low reactance equipment additional, and small reactor on neutral point measuring and controlling protective device has been separately configured in low reactance complete set of equipments, defencive function
Including overload and overcurrent protection, main transformer protection device is free of the defencive function of low reactance, main transformer protection device
With low reactance protective device separate configuration.The protection system of the prior art increases screen bit quantity, cable connection quantity and cost
Investment, warning message are not easy to integrate.
The technical solution of the utility model embodiment is described in detail below.
Fig. 2 is the main transformer equipment protection system structural schematic diagram that the utility model embodiment provides.As shown in Fig. 2,
The main transformer equipment protection system that the utility model embodiment provides, including：Main transformer 10, protective device 20 and electric current return
Road 30.
Protective device 20 includes the main transformer protection module 21 combined and low reactance protection module 22, and electric current returns
Road 30 includes the first current loop 31 and the second current loop 32.Main transformer protection module 21 by the first current loop 31 with
Main transformer 10 is connected, and low reactance protection module 22 is connected by the second current loop 32 with main transformer 10.
Specifically, Fig. 3 is that the transformer equipment protection system that the utility model embodiment is provided matches drawing, such as Fig. 3 institutes
Show, main transformer protection module 21 and low reactance protection module 22 are arranged in same protection screen, can during specific implementation
Multiple protection screens are arranged according to actual conditions, corresponding main transformer protection module is set in each protection screen and low reactance is protected
The case where shield module, Fig. 3 shows two protection screens.
Specifically, the main transformer protection module protection function includes：Longitudinal difference protection divides side differential protection and failure point
Measure differential protection.The low reactance protection module defencive function includes：Overload protection and overcurrent protection.The main transformer packet
Include the high-pressure sides 550kV, 220KV medium voltage sides and 35KV low-pressure sides.
Specifically, Fig. 4 is the current circuit connections figure that the utility model embodiment is provided, as shown in figure 4, current loop
30 include the first current loop 31 and current loop 32, and current loop 32 includes main transformer neutral point low reactance zero-sequence current
Mutual inductor 1LLH electric currents.
Optionally, Fig. 5 is the input circuit contact contact figure that the utility model embodiment is provided, as shown in figure 5, described
System further includes protection input circuit, and the throwing of low reactance defencive function is provided in the protection input circuit and moves back pressing plate, described small
The throwing of reactance defencive function moves back pressing plate and is connected with low reactance protection module 22, the protection for selecting the low reactance protection module 22
Function (overload protection, overcurrent protection) is moved back to realize unrestricted choice defencive function and freely throw.
Optionally, Fig. 6 is the output loop contact contact figure that the utility model embodiment is provided, as shown in fig. 6, described
System further includes output loop, and trip(ping) circuit, the trip(ping) circuit and low reactance protection module are provided in the output loop
22 are connected, and have trip protection function.The quantity of the trip(ping) circuit can be freely arranged, and the utility model does not limit herein
System, Fig. 6 show 2 tunnel trip(ping) circuits.
Optionally, the system also includes data collection and processing module, the data collection and processing module and protection
Device 20, transformer 10 are communicatively coupled, the data collection and processing module for being filtered to collected data,
Amplitude calculating, Vector operation, order components calculate；Stabilization, delay, broadening processing and difference stream, braking are carried out to collected data
The calculating of electric current；According to data processed result, trip command and/or protection instruction are generated.
The main transformer equipment protection system that the utility model embodiment provides, the system comprises：Main transformer, protection
Device and current loop；Wherein, the protective device includes the main transformer protection module combined and low reactance protection
Module, the current loop include the first current loop and the second current loop；The main transformer protection module passes through described
First current loop is connected with the main transformer, and the low reactance protection module passes through second current loop and the master
Transformer is connected.By the system, it is capable of being protected to main transformer equipment for centralized integrated, reduces protection room screen
Position setting quantity, main transformer protection become concentrating from disperseing, and reduce cable connection quantity and cost of investment.It improves simultaneously
In the prior art the drawbacks of the configuration of low reactance protective device list set.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of main transformer equipment protection system, which is characterized in that including：
Main transformer, protective device and current loop；Wherein,
The protective device includes the main transformer protection module combined and low reactance protection module, the current loop
Including the first current loop and the second current loop；
The main transformer protection module is connected by first current loop with the main transformer, the low reactance protection
Module is connected by second current loop with the main transformer.
2. system according to claim 1, which is characterized in that the system also includes protection input circuit, the protections
It is provided with the throwing of low reactance defencive function in input circuit and moves back pressing plate, pressing plate and the low reactance are moved back in the low reactance defencive function throwing
Protection module is connected.
3. system according to claim 1 or 2, which is characterized in that the system also includes output loops, described to export back
Trip(ping) circuit is provided in road, the trip(ping) circuit is connected with the low reactance protection module.
4. system according to claim 1, which is characterized in that the main transformer protection module and low reactance protection
Module is arranged in same protection screen.
5. system according to claim 1, which is characterized in that the main transformer protection module protection function includes：It is vertical
Difference protection divides side differential protection and fault component based differential protection to protect.
6. system according to claim 1, which is characterized in that the low reactance protection module defencive function includes：It crosses negative
Lotus protects and overcurrent protection.
7. according to claims 1 or 2 or 4-6 any one of them systems, which is characterized in that the system also includes data collections
And processing module, the data collection and processing module are communicatively coupled with the protective device, the transformer.
8. according to claims 1 or 2 or 4-6 any one of them systems, which is characterized in that the main transformer includes 550kV
High-pressure side, 220KV medium voltage sides and 35KV low-pressure sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820067702.5U CN208062774U (en) | 2018-01-12 | 2018-01-12 | A kind of main transformer equipment protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820067702.5U CN208062774U (en) | 2018-01-12 | 2018-01-12 | A kind of main transformer equipment protection system |
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| Publication Number | Publication Date |
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| CN208062774U true CN208062774U (en) | 2018-11-06 |
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| CN201820067702.5U Active CN208062774U (en) | 2018-01-12 | 2018-01-12 | A kind of main transformer equipment protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342429A (en) * | 2020-04-22 | 2020-06-26 | 郑州润杰电力勘测设计有限公司 | Main transformer equipment protection system |
-
2018
- 2018-01-12 CN CN201820067702.5U patent/CN208062774U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342429A (en) * | 2020-04-22 | 2020-06-26 | 郑州润杰电力勘测设计有限公司 | Main transformer equipment protection system |
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