CN207675865U - A kind of high-tension cable differential protection check system of no load condition - Google Patents
A kind of high-tension cable differential protection check system of no load condition Download PDFInfo
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- CN207675865U CN207675865U CN201721922593.2U CN201721922593U CN207675865U CN 207675865 U CN207675865 U CN 207675865U CN 201721922593 U CN201721922593 U CN 201721922593U CN 207675865 U CN207675865 U CN 207675865U
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- demagnetization
- tension cable
- differential protection
- check system
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Abstract
The utility model discloses a kind of high-tension cable differential protection check systems of no load condition.Belong to high-tension cable differential protection calibration technology field, which can carry out demagnetization operation to generator automatically when power failure occurs in voltage stabilizing washing pipe analysis system ontology.Controller, degaussing switch device, high-tension cable differential protection check system ontology and the generator that mains power is provided for high-tension cable differential protection check system ontology；Degaussing switch device includes the main break-make control module of No.1 and demagnetization module；The input terminal of the main break-make control module of No.1 and the input terminal of demagnetization module are respectively coupled on the power output end of generator；The output end of the main break-make control module of No.1 is connected on 220KV busbares.
Description
Technical field
The utility model is related to high-tension cable differential protection calibration technology fields, and in particular to a kind of height of no load condition
Voltage cable differential protection check system.
Background technology
Currently, the high-tension cable differential protection check system of no load condition is in zero load high-voltage electricity relatively difficult to achieve
Cable differential protection verifies；And the electricity consumption of high-tension cable differential protection check system is larger, when high-tension cable differential protection school
Check system break down power-off suddenly when, the electric energy that disconnects suddenly or to providing power supply for high-tension cable differential protection check system
The generator of power generates huge impact, and even generator is burnt out when serious.Therefore one kind is designed in the case that zero load
It can realize that high-tension cable differential protection verifies, and when power failure occurs in high-tension cable differential protection check system, be not easy to
The system for burning out generator is very necessary.
Utility model content
The utility model is to solve the above problem of existing high-tension cable differential protection check system ontological existence, carry
For a kind of high-tension cable differential protection check system of no load condition, which can also realize high-voltage electricity in the case that zero load
Cable differential protection verifies, and when power failure occurs in high-tension cable differential protection check system ontology, can be automatically to generator
Demagnetization operation is carried out, protection generator power failure will not occurs because of high-tension cable differential protection check system ontology and cause
The case where generator is burned occurs, and extends the service life of generator.
The above technical problem is solved by following technical proposal：
A kind of high-tension cable differential protection check system of no load condition, including controller, degaussing switch device, height
Voltage cable differential protection check system ontology and the power generation that mains power is provided for high-tension cable differential protection check system ontology
Machine；
High-tension cable differential protection check system ontology include open it is standby become circuit, open it is standby become circuit include 220KV busbares,
220KV power cables differential protecting CT 1,220KV power cables, 220KV power cables differential protecting CT 2, A open standby change, 220KV
Power cable differential protecting CT 3 and B open standby change；One end of 220KV power cables differential protecting CT 1 is connected on 220KV busbares,
The other end of 220KV power cables differential protecting CT 1 is connected on one end of 220KV power cables, and 220KV power cables are differential
One end of one end and 220KV power cables differential protecting CT 3 for protecting CT2 is all connected on the other end of 220KV power cables；
The other end of 220KV power cables differential protecting CT 2 is connected to A and opens on standby become；220KV power cables differential protecting CT 3 it is another
One end is connected to B and opens on standby become；
The degaussing switch device includes the main break-make control module of No.1 and demagnetization module；The main break-make of No.1 controls mould
The input terminal of block and the input terminal of demagnetization module are respectively coupled on the power output end of generator；The main break-make control of No.1
The output end of molding block is connected on 220KV busbares；Control terminal, the No.1 of the high-tension cable differential protection check system ontology
The control terminal of main break-make control module and the control terminal of demagnetization module are connect with controller respectively.
Start, selects a 6kV low-tension transformer to carry out impact test, and enroll dash current；Then test result is analyzed,
And it is verified by other test methods；Then Switching impulse experiment is carried out under rated voltage to power cable；Then it selects
Survey record point is selected at 220kV switchyard relay bungalow differential protection screens；Then standby become is opened to B under rated voltage to impact
It closes a floodgate and tests, survey record surge waveform；Last shock wave shape compares and analyzes, and terminates after obtaining final test result.
When power failure occurs in high-tension cable differential protection check system ontology, demagnetization module starts immediately to generator
Demagnetization operation is carried out, to protect generator to be not easy to be burned.This programme can also realize that high-tension cable is poor in the case that zero load
Dynamic protective calibration, and when power failure occurs in high-tension cable differential protection check system ontology, generator can be carried out automatically
Demagnetization operation, protection generator power failure will not occur because of high-tension cable differential protection check system ontology and cause to generate electricity
The case where machine is burned occurs, and extends the service life of generator.Simple in structure, safety is good, and reliability is high.
Preferably, the degaussing switch device further includes No. two main break-make control modules；No. two main break-make control
The input terminal of module is connected on the power output end of generator；The output end of No. two main break-make control modules is connected to
On 220KV busbares；The control terminal of No. two main break-make control modules is connect with controller.This structure can be in No. two main break-make controls
Carry out switch opening/closing time detection when the module free time or when No.1 main break-make control module free time to it respectively, reliability is high.
Preferably, the main break-make control module of No.1 includes No.1 left-handed opening, No.1 relay and the right switch of No.1,
No. two main break-make control modules include No. two left-handed openings, No. two relays and No. two right switches, and the demagnetization module includes
Demagnetization left-handed opening, demagnetization relay, the right switch of demagnetization and de-excitation resistance；
The left end of the left end of the No.1 left-handed opening, the left end of No. two left-handed openings and demagnetization left-handed opening is connected to power generation
On the power output end of machine；The right end of the No.1 left-handed opening is connected to the left end of No.1 relay, the right end of No.1 relay
It is connected to the left end of the right switch of No.1, the right end of the right switch of No.1 is connected on 220KV busbares；The right end of No. two left-handed openings
It is connected to the left end of No. two relays, the right end of No. two relays is connected to the left end of No. two right switches, the right side of No. two right switches
End is connected on 220KV busbares；Demagnetization left-handed opening right end is connected to the left end of demagnetization relay, the right end connection of demagnetization relay
It is connected on de-excitation resistance in the right end of the left end of the right switch of demagnetization, the right switch of demagnetization；
The control terminal of the right switch of the control terminal of No.1 left-handed opening, the control terminal of No.1 relay, No.1, No. two left-handed openings
Control terminal, the control terminal of No. two relays, the control terminals of No. two right switches, the control terminal of demagnetization left-handed opening, demagnetization relay
Control terminal and the control terminal of the right switch of demagnetization are connect with controller respectively.
The utility model can reach following effect：
The utility model can also realize that high-tension cable differential protection verifies in the case that zero load, and differential in high-tension cable
When power failure occurs in protective calibration system ontology, can demagnetization operation be carried out to generator automatically, protection generator will not be because of
The case where high-tension cable differential protection check system ontology power failure occurs and generator is caused to be burned occurs, and extends power generation
The service life of machine.Simple in structure, safety is good, and reliability is high.
Description of the drawings
Fig. 1 is a kind of schematic diagram of circuit principle connecting structure of the utility model.
Fig. 2 is a kind of circuit theory connection structure schematic block diagram of the utility model.
Fig. 3 is that the utility model opens a kind of standby schematic diagram of circuit principle connecting structure for becoming circuit.
Specific implementation mode
The utility model is further described with embodiment below in conjunction with the accompanying drawings.
Embodiment：A kind of high-tension cable differential protection check system of no load condition, shown in Fig. 1-Fig. 3.Including
Controller w4, degaussing switch device w19, high-tension cable differential protection check system ontology w18 and be high-tension cable differential protection
Check system ontology provides the generator w17 of mains power；
High-tension cable differential protection check system ontology include open it is standby become circuit, open it is standby become circuit include 220KV busbares,
220KV power cables differential protecting CT 1,220KV power cables, 220KV power cables differential protecting CT 2, A open standby change, 220KV
Power cable differential protecting CT 3 and B open standby change；One end of 220KV power cables differential protecting CT 1 is connected on 220KV busbares,
The other end of 220KV power cables differential protecting CT 1 is connected on one end of 220KV power cables, and 220KV power cables are differential
One end of one end and 220KV power cables differential protecting CT 3 for protecting CT2 is all connected on the other end of 220KV power cables；
The other end of 220KV power cables differential protecting CT 2 is connected to A and opens on standby become；220KV power cables differential protecting CT 3 it is another
One end is connected to B and opens on standby become；
The degaussing switch device includes the main break-make control module w1 of No.1, No. two main break-make control module w2 and demagnetization mould
Block w3；The input terminal of the main break-make control module of No.1, the input terminal of No. two main break-make control modules and demagnetization module it is defeated
Enter end to be respectively coupled on the power output end of generator；The output end of the main break-make control module of No.1 and No. two masters are logical
The output end of disconnected control module is respectively coupled on 220KV busbares；The high-tension cable differential protection check system ontology
The control of the control terminal of the main break-make control module of control terminal, No.1, the control terminal and demagnetization module of No. two main break-make control modules
End is connect with controller respectively.
The main break-make control module of No.1 includes No.1 left-handed opening w7, No.1 relay w8 and the right switch w9 of No.1, institute
It includes No. two left-handed opening w10, No. two relay w11 and No. two right switch w12, the demagnetization mould to state No. two main break-make control modules
Block includes demagnetization left-handed opening w13, demagnetization relay w14, demagnetization right switch w15 and de-excitation resistance w16；
The left end of the left end of the No.1 left-handed opening, the left end of No. two left-handed openings and demagnetization left-handed opening is connected to power generation
On the power output end of machine；The right end of the No.1 left-handed opening is connected to the left end of No.1 relay, the right end of No.1 relay
It is connected to the left end of the right switch of No.1, the right end of the right switch of No.1 is connected on 220KV busbares；The right end of No. two left-handed openings
It is connected to the left end of No. two relays, the right end of No. two relays is connected to the left end of No. two right switches, the right side of No. two right switches
End is connected on 220KV busbares；Demagnetization left-handed opening right end is connected to the left end of demagnetization relay, the right end connection of demagnetization relay
It is connected on de-excitation resistance in the right end of the left end of the right switch of demagnetization, the right switch of demagnetization；
The control terminal of the right switch of the control terminal of No.1 left-handed opening, the control terminal of No.1 relay, No.1, No. two left-handed openings
Control terminal, the control terminal of No. two relays, the control terminals of No. two right switches, the control terminal of demagnetization left-handed opening, demagnetization relay
Control terminal and the control terminal of the right switch of demagnetization are connect with controller respectively.
A kind of demagnetization control of the high-tension cable differential protection check system ontology of no load condition is as follows：
If the main break-make control module of No.1 is since controller sends out No.1 open command to the main break-make control module of No.1
A length of T1 when the disconnection reaction needed for disconnection action is completed,
If No. two main break-make control modules are since controller sends out No. two open commands to No. two main break-make control modules
A length of T2 when the disconnection reaction needed for disconnection action is completed,
If demagnetization module completes leading needed for turn-on action since controller sends out demagnetization turn-on command to demagnetization module
A length of T3 when logical reaction；
If generator system corresponding to a kind of high-tension cable differential protection check system ontology of no load condition goes out
Time needed for magnetic switching is H；
When the main break-make control module conducting of No.1, No. two main break-make control modules are then off, and are being controlled at this time
The value and demagnetization module conducting reaction duration of the disconnection reaction duration T2 of No. two main break-make control modules are detected under the control of device processed
The value of T3；Calculate demagnetization module be conducting to No. two main break-make control modules disconnect between time difference H2, then have H2=| T2-T3
|≤H；When it is back to back to carry out demagnetization operation in the case of No. two main break-make control modules conductings next time when, if working as T2-
When T3 >=0, then the H2 time internal controllers after No. two open commands start are sent out to No. two main break-make control modules in controller
Demagnetization turn-on command will be sent out to demagnetization module；If when T2-T3 ＜ 0, being sent out to No. two main break-make control modules in controller
Demagnetization module will be sent out demagnetization turn-on command by going out the H2 times internal controller before No. two open commands start；
When No. two main break-make control module conductings, the main break-make control module of No.1 is then off, and is being controlled at this time
The value and demagnetization module conducting reaction duration of the disconnection reaction duration T1 of the main break-make control module of No.1 are detected under the control of device processed
The value of T3；Calculate demagnetization module be conducting to the main break-make control module of No.1 disconnect between time difference H1, then have H1=| T1-T3
|≤H；When it is back to back to carry out demagnetization operation in the case of No.1 main break-make control module conducting next time when, if working as T1-
When T3 >=0, then the H1 time internal controllers after No.1 open command starts are sent out to the main break-make control module of No.1 in controller
Demagnetization turn-on command will be sent out to demagnetization module；If when T1-T3 ＜ 0, being sent out to the main break-make control module of No.1 in controller
The H1 times internal controller gone out before No.1 open command starts will send out demagnetization module demagnetization turn-on command.
When duration T1 is reacted in the disconnection for detecting the main break-make control module of No.1, under the control of the controller, No.1 is first allowed
Left-handed opening and the right switch of No.1 all disconnect, and duration, the disconnection of the No.1 relay are reacted in the disconnection for then detecting No.1 relay
It is T1 to react duration；It has detected after the disconnection reaction duration T1 of No.1 relay then by No.1 left-handed opening and the right switch of No.1
It is all closed, and No.1 relay is allowed to be off；
When duration T2 is reacted in the disconnection for detecting No. two main break-make control modules, under the control of the controller, No. two are first allowed
Left-handed opening and No. two right switches all disconnect, and duration, the disconnection of No. two relays are reacted in the disconnection for then detecting No. two relays
It is T2 to react duration；It has detected after the disconnection reaction duration T2 of No. two relays then by No. two left-handed openings and No. two right switches
It is all closed, and No. two relays is allowed to be off；
When detecting demagnetization module conducting reaction duration T3, under the control of the controller, demagnetization left-handed opening and demagnetization are first allowed
Right switch all disconnects, and then detects the closed reaction duration of demagnetization relay, and the closed reaction duration of the demagnetization relay is
T3；Then the right switch of demagnetization left-handed opening and demagnetization is all closed after having detected the closed reaction duration T3 of demagnetization relay, and is allowed
Demagnetization relay is off.
If the main break-make control module of No.1 and No. two main break-make control modules are all in the demagnetization mistake in the case of conducting state
Cheng Shi, when T1 ＜ T2 if in demagnetization when, the main break-make control module of No.1 will be before No. two main break-make control modules disconnect first
It disconnects；Conversely, if when T1 ＞ T2 in demagnetization when, No. two main break-make control modules will disconnect it in the main break-make control module of No.1
It is preceding first to disconnect.
High-tension cable differential protection verification resolution policy is in the case of zero load：
1) before differential protection input, load test rheology is needed to draw polarity；It is short in the low-pressure side three-phase of transformer
The power supply of 400V is added from high-pressure side for road, using the direct impedance of transformer, obtains the current phase of the differential CT of cable, verification
CT polarity；
2) a flow-through test is carried out to cable differential protection both sides CT, to verify cable differential protecting CT polarity；
3) record transformer shock excitation is surveyed to shove to verify cable differential protecting CT polarity.When impact is gone into operation in standby change
It waits to lead to both sides secondary current needed for cable differential protection and a little surveys record, compares.
The polarity of 220kV cable differential protection A phases, B phases and C phases is all opposite with the polarity of CT.CT includes CT1, CT2
And CT3.
The differential protection of high-tension cable differential protection check system ontology verify the specific implementation process is as follows：
Start, selects a 6kV low-tension transformer to carry out impact test, and enroll dash current；Then test result is analyzed,
And it is verified by other test methods；Then Switching impulse experiment is carried out under rated voltage to power cable；Then it selects
Survey record point is selected at 220kV switchyard relay bungalow differential protection screens；Then standby become is opened to B under rated voltage to impact
It closes a floodgate and tests, survey record surge waveform；Last shock wave shape compares and analyzes, and terminates after obtaining final test result.
When power failure occurs in high-tension cable differential protection check system ontology, demagnetization module starts immediately to generator
Demagnetization operation is carried out, to protect generator to be not easy to be burned.The present embodiment can also realize high-tension cable in the case that zero load
Differential protection verifies, and when there is power failure in high-tension cable differential protection check system ontology, can automatically to generator into
Row demagnetization operation, protection generator power failure will not occur because of high-tension cable differential protection check system ontology and cause to send out
The case where motor is burned occurs, and extends the service life of generator.Simple in structure, safety is good, and reliability is high.
The embodiments of the present invention have been described above with reference to the accompanying drawings, and however, the implementation is not limited to the above embodiments, this
Field those of ordinary skill can be with various changes and modifications may be made within the scope of the appended claims.
Claims (3)
1. a kind of high-tension cable differential protection check system of no load condition, which is characterized in that including controller, degaussing switch
Device, high-tension cable differential protection check system ontology and provide mains power for high-tension cable differential protection check system ontology
Generator；
High-tension cable differential protection check system ontology includes 220KV busbares, 220KV including opening standby change circuit, opening the standby circuit that becomes
Power cable differential protecting CT 1,220KV power cables, 220KV power cables differential protecting CT 2, A open standby change, 220KV electric power
Cable differential protecting CT 3 and B open standby change；One end of 220KV power cables differential protecting CT 1 is connected on 220KV busbares,
The other end of 220KV power cables differential protecting CT 1 is connected on one end of 220KV power cables, and 220KV power cables are differential
One end of one end and 220KV power cables differential protecting CT 3 for protecting CT2 is all connected on the other end of 220KV power cables；
The other end of 220KV power cables differential protecting CT 2 is connected to A and opens on standby become；220KV power cables differential protecting CT 3 it is another
One end is connected to B and opens on standby become；
The degaussing switch device includes the main break-make control module of No.1 and demagnetization module；The main break-make control module of No.1
Input terminal and the input terminal of demagnetization module are respectively coupled on the power output end of generator；The main break-make of No.1 controls mould
The output end of block is connected on 220KV busbares；The control terminal of the high-tension cable differential protection check system ontology, No.1 master are logical
The control terminal of disconnected control module and the control terminal of demagnetization module are connect with controller respectively.
2. a kind of high-tension cable differential protection check system of no load condition according to claim 1, which is characterized in that
The degaussing switch device further includes No. two main break-make control modules；The input terminal of No. two main break-make control modules is connected to
On the power output end of generator；The output end of No. two main break-make control modules is connected on 220KV busbares；No. two masters are logical
The control terminal of disconnected control module is connect with controller.
3. a kind of high-tension cable differential protection check system of no load condition according to claim 2, which is characterized in that
The main break-make control module of No.1 includes No.1 left-handed opening, No.1 relay and the right switch of No.1, No. two main break-make controls
Molding block include No. two left-handed openings, No. two relays and No. two right switches, the demagnetization module include demagnetization left-handed opening, demagnetization after
The right switch of electric appliance, demagnetization and de-excitation resistance；
The left end of the left end of the No.1 left-handed opening, the left end of No. two left-handed openings and demagnetization left-handed opening is connected to generator
On power output end；The right end of the No.1 left-handed opening is connected to the left end of No.1 relay, the right end connection of No.1 relay
It is connected on 220KV busbares in the right end of the left end of the right switch of No.1, the right switch of No.1；The right end of No. two left-handed openings connects
In the left end of No. two relays, the right end of No. two relays is connected to the left end of No. two right switches, and the right end of No. two right switches connects
It is connected on 220KV busbares；Demagnetization left-handed opening right end is connected to the left end of demagnetization relay, and the right end of demagnetization relay, which is connected to, to go out
The right end of the left end of the right switch of magnetic, the right switch of demagnetization is connected on de-excitation resistance；
The control of the control terminal of the right switch of the control terminal of No.1 left-handed opening, the control terminal of No.1 relay, No.1, No. two left-handed openings
The control at end, the control terminal of No. two relays, the control terminal, the control terminal, demagnetization relay of demagnetization left-handed opening of No. two right switches
The control terminal of end and the right switch of demagnetization is connect with controller respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922593.2U CN207675865U (en) | 2017-12-31 | 2017-12-31 | A kind of high-tension cable differential protection check system of no load condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922593.2U CN207675865U (en) | 2017-12-31 | 2017-12-31 | A kind of high-tension cable differential protection check system of no load condition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110854924A (en) * | 2019-11-04 | 2020-02-28 | 中国能源建设集团华东电力试验研究院有限公司 | One-time voltage-on synchronous phase-checking linkage switching inspection system and inspection method for electrical system |
| CN112834869A (en) * | 2021-01-11 | 2021-05-25 | 中国能源建设集团华东电力试验研究院有限公司 | Differential protection calibration system for large-length submarine cable in no-load state |
-
2017
- 2017-12-31 CN CN201721922593.2U patent/CN207675865U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110854924A (en) * | 2019-11-04 | 2020-02-28 | 中国能源建设集团华东电力试验研究院有限公司 | One-time voltage-on synchronous phase-checking linkage switching inspection system and inspection method for electrical system |
| CN112834869A (en) * | 2021-01-11 | 2021-05-25 | 中国能源建设集团华东电力试验研究院有限公司 | Differential protection calibration system for large-length submarine cable in no-load state |
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