CN208142823U - A kind of main transformer protection device for 500kV line transformer group - Google Patents
A kind of main transformer protection device for 500kV line transformer group Download PDFInfo
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- CN208142823U CN208142823U CN201820465372.5U CN201820465372U CN208142823U CN 208142823 U CN208142823 U CN 208142823U CN 201820465372 U CN201820465372 U CN 201820465372U CN 208142823 U CN208142823 U CN 208142823U
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Abstract
The utility model provides a kind of main transformer protection device for 500kV line transformer group.A kind of main transformer protection device for 500kV line transformer group, wherein line transformer group installs the highly resistance wiring of 500kV bus, including：The first analog quantity AM access module corresponding with 500kV bus highly resistance wiring；Second analog quantity AM access module, third analog quantity AM access module；Acquisition module, the current information that acquisition module is connected with each analog quantity AM access module for acquiring each analog quantity；6 trip switches；The processing module being connected with acquisition module, each trip switch, the switch that processing module is used to control 6 trip switches according to current information operate.The protection's dead-zone under the connection type is effectively eliminated, guarantees the stable operation of substation, eliminate the security risk of substation operation, keep the stabilization of power grid.
Description
【Technical field】
The utility model relates to electrical equipment protection technique fields, more particularly to one kind to be used for 500kV line transformer group
Main transformer protection device.
【Background technique】
Existing routine 500kV main transformer protection device only has access 2 road 500kV analog quantitys, uses if being applied to 500kV
Line transformer group installs 500kV bus highly resistance connection type simultaneously, there are protection's dead-zone, there are the risk of protection misoperation,
Influence the safe operation of substation.Therefore it needs to research and develop a kind of stable operation of guarantee substation, eliminate substation operation
Security risk keeps the stable protective device of power grid.
【Summary of the invention】
In view of this, the present invention provides a kind of main transformer protection device for 500kV line transformer group, to
Solving the problem of routine 500kV main transformer protection device, there are the risks of protection misoperation there are protection's dead-zone.
The utility model provides a kind of main transformer protection device for 500kV line transformer group, including：Route transformation
Device group installs the highly resistance wiring of 500kV bus；The first analog quantity AM access module corresponding with 500kV bus highly resistance wiring；Second
Analog quantity AM access module, third analog quantity AM access module；Acquisition module, acquisition module is connected with each analog quantity AM access module to be used for
Acquire the current information of each analog quantity；6 trip switches；The processing module being connected with acquisition module, each trip switch handles mould
The switch that block is used to control 6 trip switches according to current information operates.
Further, 6 trippings of the main transformer protection device provided by the utility model for 500kV line transformer group
Switch includes 2 trip switches corresponding with 500kV bus highly resistance wiring.
Further, 6 trippings of the main transformer protection device provided by the utility model for 500kV line transformer group
In switch, 4 trip switches of 2 trip switches corresponding with 500kV bus highly resistance wiring and remaining can be opened simultaneously
Operation.
Further, the acquisition mould of the main transformer protection device provided by the utility model for 500kV line transformer group
Block includes the first acquisition corresponding with the first analog quantity AM access module port.
Further, the first of the main transformer protection device provided by the utility model for 500kV line transformer group is adopted
Collecting port is CAN communication mouth.
Further, the electric current in the main transformer protection device provided by the utility model for 500kV line transformer group
Information includes that current difference stream, poor flow velocity be disconnected, at least one of percentage differential.
Further, each mould in the main transformer protection device provided by the utility model for 500kV line transformer group
Analog quantity AM access module and acquisition module are integrated on a circuit board.
Above-mentioned technical proposal has the advantages that：The utility model on original 2 tunnel of main transformer protection device by simulating
On the basis of amount, the 3rd tunnel analog quantity is accessed, and then breaker current transformer winding current and side circuit breaker current are mutual in formation
Sensor winding current, bus highly resistance winding current, such main transformer protection difference current calculated are just balanced, are effectively eliminated
Protection's dead-zone under the connection type guarantees the stable operation of substation, eliminates the security risk of substation operation, keeps electricity
The stabilization of net.
【Detailed description of the invention】
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, right
For those of ordinary skill in the art, without any creative labor, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of main transformer protection device for 500kV line transformer group provided by the utility model embodiment
Structural schematic diagram；
Fig. 2 is a kind of main transformer protection dress for 500kV line transformer group provided by the utility model embodiment
The circuit connection diagram set；
Fig. 3 is a kind of main transformer protection device for 500kV line transformer group provided by the utility model embodiment
Current loop schematic diagram；
Fig. 4 is a kind of main transformer protection device for 500kV line transformer group provided by the utility model embodiment
Trip(ping) circuit schematic diagram.
【Specific embodiment】
In order to better understand the technical solution of the utility model, the utility model embodiment is carried out with reference to the accompanying drawing
Detailed description.
It will be appreciated that the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The all other embodiment obtained, fall within the protection scope of the utility model.
The term used in the utility model embodiment and is not intended to merely for for the purpose of describing particular embodiments
Limit the utility model.The utility model embodiment and the "an" of singular used in the attached claims,
" described " and "the" are also intended to including most forms, unless the context clearly indicates other meaning.
Embodiment one
As shown in Fig. 1, the utility model embodiment provides a kind of main transformer protection dress for 500kV line transformer group
It sets, wherein line transformer group installs the highly resistance wiring of 500kV bus, which includes：It is connect with 500kV bus highly resistance
The corresponding first analog quantity AM access module 101 of line, the second analog quantity AM access module 102, third analog quantity AM access module 103；
Acquisition module 104, the current information that acquisition module 104 is connected with each analog quantity AM access module for acquiring each analog quantity；6 jumps
Lock switch 106；The processing module 105 being connected with acquisition module 104, each trip switch 106, processing module 105 are used for according to electricity
Stream information controls the switch operation of 6 trip switches 106.
Specific first analog quantity AM access module 101, the second analog quantity AM access module 102, third analog quantity AM access module
103 respectively include being serially connected in the current transformer on circuit, for measure protected device different test points curent change,
It is without exception to find that monitored equipment has.The specific can be that flowing in and out the difference of the current value of protected device.Its
Middle current transformer can be the D grade iron core mutual inductor with air gap, and further during use can be appropriate
Increase current transformer ratio to reduce short-circuit current multiple, can effectively weaken excitation surge current in this way, reduce differential circuit
The out-of-balance current of middle generation improves the sensitivity of differential protection.
Acquisition module 104 collects the electric current letter of the corresponding corresponding test point of analog quantity in different analog quantity AM access modules respectively
Breath, and send information to processing module 105.Current information is compared in processing module 105, judges whether to break down,
Break down then starting tripping switch 106.Acquisition module 104 passes through setting acquisition port collected current information, specific 500kV
Corresponding first analog quantity of bus highly resistance wiring has corresponding collection port.Corresponding second analog quantity, third analog quantity also have
Standby corresponding collection port.Above-mentioned port can be CAN communication mouth.Wherein, current information include current difference stream, poor flow velocity it is disconnected,
At least one of percentage differential.
When 105 logical operation of processing module is the result is that there are when internal fault, trip switch 106 can control, realize
Open circuit, to protect protected equipment.Protected equipment is 500KV line transformer group.6 trip switches 106, including
The corresponding on high-tension side trip switch 106 of trip switch 106 and 4 of 2 high anti-side.In the event of a failure, it can control highly resistance
The corresponding trip switch 106 in side is opened simultaneously on high-tension side trip switch 106, realizes the duplicate protection of circuit.
When specific 500KV line transformer group installing 500kV bus highly resistance connection type, the connection relationship of route can be with
As shown in Figure 2.Existing routine 500kV main transformer protection device accesses 2 road 500kV analog quantitys, if being applied to 500kV uses line
Road transformer group installs 500kV bus highly resistance connection type simultaneously, and there are protection's dead-zones, and there are the risk of protection misoperation, shadows
The safe operation of substation is rung, so the present embodiment by the basis of original 2 tunnel analog quantity, accesses the 3rd tunnel analog quantity, into
And breaker current transformer winding current and side circuit breaker electric current transformer winding current in being formed, bus highly resistance winding electricity
Stream, such main transformer protection difference current calculated just balances, solve due to by transformer magnetizing current, the mode of connection,
The influence of the factors such as current transformer error, the out-of-balance current formed in the loop.The presence of out-of-balance current can lead to change
Depressor differential protection malfunction brings difficulty to the realization of transformer differential protection.The utility model embodiment is by introducing the 3rd tunnel
Analog quantity forms three groups of winding currents, balances difference current, solves the problems, such as that there are protection's dead-zones under current connection type.
The current loop figure of further three groups of electric currents is as shown in Figure 3.It is carried out by the introducing of the electric current of three tunnel analog quantitys
Differential calculating.
The setting of further trip switch is to increase by 2 tripping outlets on the basis of original, respectively for jumping
The anti-head end switch 106 of highly resistance high jump and the anti-head end switch 106 of high jump are opened, when protection act, can not only be opened tripping high-pressure side
106 are closed, and has tripping highly resistance switch 106.
Further each analog quantity AM access module and acquisition module are integrated on a circuit board.
Using a kind of stream of the main transformer protection device for 500kV line transformer group provided by the embodiment of the utility model
Journey, including：Line transformer group installs the highly resistance wiring of 500kV bus；Access the first analog quantity, the second analog quantity, third simulation
Amount, wherein third analog quantity is corresponding with 500kV bus highly resistance wiring；Acquire the current information of each analog quantity；According to each simulation
The current information of amount controls the operation of the on or off of 6 trip switches.
By on the basis of original 2 tunnel analog quantity, introducing the 3rd tunnel analog quantity, and then breaker Current Mutual Inductance in formation
Device winding current and side circuit breaker electric current transformer winding current, bus highly resistance winding current, such main transformer protection are calculated
Difference current just balances, and solves due to the shadow by factors such as transformer magnetizing current, the mode of connection, current transformer errors
It rings, the out-of-balance current formed in the loop.The presence of out-of-balance current can lead to transformer differential protection malfunction, give transformation
The realization of device differential protection brings difficulty.The utility model embodiment forms three groups of winding electricity by introducing the 3rd tunnel analog quantity
Stream, balances difference current, solves the problems, such as that there are protection's dead-zones under current connection type.
Further current information includes that current difference stream, poor flow velocity be disconnected, at least one of percentage differential.
By judging three groups of winding current informations of analog quantity, and then judge that transformer group has fault-free, and further
On or off trip switch 106 is removed, realizes the protection by protection equipment, method provided by the embodiment of the utility model is using 6 jumps
Lock switch 106, including 2 trip switches 106 corresponding with 500kV bus highly resistance wiring are believed according to the electric current of each analog quantity
Breath control 2 trip switches 106 corresponding with 500kV bus highly resistance wiring and remaining 4 trip switch 106 simultaneously into
The operation that row is opened.Wherein 2 trip switches 106 corresponding with 500kV bus highly resistance wiring are based on the first newly-increased simulation
Amount is accordingly arranged so that high anti-side trip switch 106 opened operation when, can be jumped simultaneously with other high-pressure sides
Lock switch 106 is opened simultaneously, wherein the open and close of trip switch 106 operation it is corresponding be route disconnection and closure.Pass through
Disconnecting circuit is to realize the protection by protection equipment.
By increasing the 3rd tunnel analog quantity of setting, adjustment response acquisition port number in conventional 500kV main transformer protection device
Amount and trip switch number solve and are currently applied to 500kV using line transformer group while installing 500kV bus highly resistance and connect
Line form there are the risk of protection misoperation, the problem of influencing the safe operation of substation, guarantees power transformation there are protection's dead-zone
The stable operation stood, the security risk for eliminating substation operation, keep the stable protective device of power grid.
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 substitution, improvement and etc. done should be included in the utility model
Within the scope of protection.
Claims (7)
1. a kind of main transformer protection device for 500kV line transformer group, the line transformer group installing 500kV bus is high
Anti- wiring, which is characterized in that including：
The first analog quantity AM access module corresponding with the 500kV bus highly resistance wiring；
Second analog quantity AM access module, third analog quantity AM access module；
Acquisition module, the electric current that the acquisition module is connected with each analog quantity AM access module for acquiring each analog quantity
Information；
6 trip switches；
The processing module being connected with the acquisition module, each trip switch, the processing module are used for according to the electric current
Information controls the switch operation of 6 trip switches.
2. main transformer protection device according to claim 1, which is characterized in that 6 trip switches include 2 with it is described
The corresponding trip switch of 500kV bus highly resistance wiring.
3. main transformer protection device according to claim 2, which is characterized in that described 2 connect with the 500kV bus highly resistance
The operation that the corresponding trip switch of line and remaining 4 described trip switch can be opened simultaneously.
4. main transformer protection device according to claim 1, which is characterized in that the acquisition module includes and first mould
Analog quantity AM access module corresponding first acquisition port.
5. main transformer protection device according to claim 4, which is characterized in that first acquisition port is CAN communication mouth.
6. main transformer protection device according to claim 1, which is characterized in that the current information includes current difference stream, difference
Flow velocity is disconnected, percentage differential at least one.
7. main transformer protection device according to claim 1, which is characterized in that each analog quantity AM access module and acquisition mould
Block is integrated on a circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820465372.5U CN208142823U (en) | 2018-04-03 | 2018-04-03 | A kind of main transformer protection device for 500kV line transformer group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820465372.5U CN208142823U (en) | 2018-04-03 | 2018-04-03 | A kind of main transformer protection device for 500kV line transformer group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208142823U true CN208142823U (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820465372.5U Active CN208142823U (en) | 2018-04-03 | 2018-04-03 | A kind of main transformer protection device for 500kV line transformer group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111092413A (en) * | 2019-11-28 | 2020-05-01 | 国电南瑞科技股份有限公司 | Relay protection method and device for rapidly removing fault of empty charge in dead zone of transformer |
-
2018
- 2018-04-03 CN CN201820465372.5U patent/CN208142823U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111092413A (en) * | 2019-11-28 | 2020-05-01 | 国电南瑞科技股份有限公司 | Relay protection method and device for rapidly removing fault of empty charge in dead zone of transformer |
| CN111092413B (en) * | 2019-11-28 | 2022-06-17 | 国电南瑞科技股份有限公司 | Relay protection method and device for rapidly removing fault of empty charge in dead zone of transformer |
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