CN108336717B - One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method - Google Patents
One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method Download PDFInfo
- Publication number
- CN108336717B CN108336717B CN201810035592.9A CN201810035592A CN108336717B CN 108336717 B CN108336717 B CN 108336717B CN 201810035592 A CN201810035592 A CN 201810035592A CN 108336717 B CN108336717 B CN 108336717B
- Authority
- CN
- China
- Prior art keywords
- machine
- main transformer
- transformer
- protection
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The invention proposes the phase modifier transformer group that is suitable for open that machine process is region-wide to open machine guard method, dead-zone fault of the machine current quick solution when the dead zone area between grid-connected breaker and grid-connected current mutual inductor occurs for fault point is opened with main transformer using the source of phase modifier transformer group, the electric current that main transformer opens in machine current quick picks up from main transformer low-pressure side current transformer or phase modifier generator terminal current transformer, it is with voltage that main transformer, which opens machine current quick investment condition, frequency, electric current and grid-connected breaker auxiliary contact information are as investment criterion, it is using voltage and grid-connected breaker auxiliary contact information as exiting criterion that main transformer, which opens machine current quick exit criteria, ensuring that main transformer opens machine current quick when grid-connected circuit breaker position is unreliable will not malfunction.
Description
Technical field
The invention belongs to Relay Protection Technology in Power System fields, and in particular to one kind is suitable for phase modifier transformer group and opens
Machine process is region-wide to open machine guard method.
Background technique
Phase modifier transformer group open machine protection include phase modifier opens machine differential protection, exciting transformer opens machine differential protection,
Main transformer opens machine current quick, phase modifier opens machine overcurrent protection, phase modifier opens machine zero sequence overvoltage protection etc., opens moving back for machine protection
Condition is that grid-connected breaker is in coincidence position or grid-connected current mutual inductor satisfaction and has stream condition out, therefore works as fault point
When dead zone area between grid-connected breaker and grid-connected current mutual inductor, as shown in Figure 1, may be unsatisfactory for opening opening for machine protection
Machine process criterion, opening machine protection may have logged out, and be likely to result in the damage of phase modifier transformer group.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes that one kind opens the region-wide machine that opens of machine process suitable for phase modifier transformer group and protects
Maintaining method, setting open machine process investment condition using electric current, voltage, frequency and locality condition as criterion, and the machine process of opening exits
Condition using voltage, locality condition as criterion, in conjunction with two criterions above-mentioned, can be realized open machine procedure fault point generation exist
When dead zone area between grid-connected breaker and grid-connected current mutual inductor, opening machine protection reliably can rapidly be acted.
It realizes above-mentioned technical purpose, reaches above-mentioned technical effect, the invention is realized by the following technical scheme:
One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method, comprising the following steps:
(1) to the failure occurred in main transformer regional scope, the failure, the excitation transformation that occur in phase modifier regional scope
Corresponding protection is set separately in the failure occurred in device regional scope, and owner's protection is opened in formation；
(2) setting phase modifier opens machine overcurrent protection as the above-mentioned back-up protection for opening owner's protection；
(3) after determining fault type, start corresponding protection, it is complete to realize that phase modifier transformer group opens machine process
Open machine protection in region.
Further, in the step (1), protection corresponding with the failure occurred in main transformer regional scope is main transformer
Open machine current quick；
Select the electric current of main transformer low-pressure side current transformer or phase modifier generator terminal side current transformer as failure electricity
Stream, when the maximum phase current that the machine process of opening meets the current transformer of main transformer low-pressure side and/or phase modifier generator terminal side is greater than
The current quick-breaking definite value of setting, then it is assumed that it has the feature that main transformer troubles inside the sample space occurs, and determines main transformer region model
It breaks down in enclosing.
Further, main transformer, which opens the investment criterion of machine current quick, is: grid-connected breaker is in quartile, simultaneously
Meet low frequency or low voltage condition, but also meets grid-connected breaker no current condition simultaneously；What the low voltage condition referred to
It is main transformer high-pressure side low voltage condition or main transformer low-pressure side/phase modifier generator terminal low voltage condition；
The criterion that exits that the main transformer opens machine current quick is: grid-connected breaker is in coincidence or is unsatisfactory for
Low voltage condition, the low voltage condition refer to main transformer high-pressure side low voltage condition or main transformer low-pressure side/tune
Camera generator terminal low voltage condition.
Further, three kinds of position access scenes of the condition of the differentiation of the grid-connected breaker quartile point carry out:
The first scene is: only grid-connected breaker quartile position is accessed, and is indicated to be in when quartile location status is 1 and be divided
Position；Second of scene is: only grid-connected breaker coincidence position is accessed, and indicates to be in quartile when coincidence location status is 0；Third
Kind scene is: when grid-connected breaker two-position is accessed, indicating when quartile position is 1, and coincidence position is 0 in quartile.
Further, three kinds of position access scenes of the condition of the differentiation of the grid-connected breaker coincidence point carry out:
The first scene is: only grid-connected breaker quartile position is accessed, and is indicated when quartile location status is 0 in conjunction
Position；Second of scene is: only grid-connected breaker coincidence position is accessed, and indicates to be in coincidence when coincidence location status is 1；Third
Kind scene is: when grid-connected breaker two-position is accessed, indicating when quartile position is 0, and coincidence position is 1 in coincidence.
Further, the low voltage condition refers to: voltage is less than setting voltage value, which should be less than volume
Constant voltage, and escape minimum voltage value when system operates normally.
Further, be unsatisfactory for low voltage condition to refer to: voltage is more than or equal to setting voltage value, the setting voltage
Value should be less than voltage rating, and escape minimum voltage value when system operates normally.
Further, the low voltage condition refers to: main transformer high side voltage or main transformer low-pressure side/tune
Camera set end voltage is less than setting voltage value, which should be less than voltage rating, and escapes when system operates normally most
Low voltage value.
Further, it is unsatisfactory for low voltage condition to refer to: main transformer high side voltage and main transformer low-pressure side/tune
Camera set end voltage is more than or equal to setting voltage value, which should be less than voltage rating, and it is normal to escape system
Minimum voltage value when operation.
Further, the low frequency condition refers to: generator terminal frequency is less than setpoint frequency value, which answers small
In system nominal frequency, and escape lowest frequency value when system operates normally.
Further, the grid-connected breaker no current condition refers to: the electricity of the whole grid-connected breaker side of main transformer
Current transformer electric current is all satisfied no current condition, i.e. main transformer high side switch electric current is respectively less than setting electric current value.
Further, protection corresponding with the failure occurred in phase modifier regional scope is that phase modifier opens machine differential protection,
Protection corresponding with the failure occurred in exciting transformer regional scope is that exciting transformer opens machine differential protection.
Compared with prior art, beneficial effects of the present invention:
The invention proposes the phase modifier transformer group that is suitable for open that machine process is region-wide to open machine guard method, utilize tune
Machine current quick is opened with main transformer and solves to occur when fault point in grid-connected breaker and grid-connected current in the source of camera transformer group
Dead-zone fault when dead zone area between mutual inductor, the electric current that main transformer opens in machine current quick pick up from main transformer low-pressure side electricity
Current transformer or phase modifier generator terminal current transformer, it is with voltage, frequency, electric current that main transformer, which opens machine current quick investment condition,
And grid-connected breaker auxiliary contact information is as investment criterion, main transformer open machine current quick exit criteria be with voltage with
And grid-connected breaker auxiliary contact information is used as and exits criterion, it is ensured that when grid-connected circuit breaker position is unreliable, main transformer opens electromechanical stream
Fast tripping protection will not malfunction.
Detailed description of the invention
Fig. 1 is the grid-connected breaker dead-zone fault point schematic diagram of phase modifier transformer group；
Fig. 2 is phase modifier transformer group main transformer low-pressure side electric current and generator terminal current transformer schematic diagram；
Fig. 3 is that main transformer opens machine current quick investment conditional logic figure；
Fig. 4 is that main transformer opens machine current quick exit criteria logic chart；
Fig. 5 is that main transformer opens machine current quick investment summer condition logic chart；
Fig. 6 is that main transformer opens machine current quick-breaking relay protective scheme figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method, comprising the following steps:
(1) to the failure occurred in main transformer regional scope, the failure, the excitation transformation that occur in phase modifier regional scope
Corresponding protection is set separately in the failure occurred in device regional scope, and owner's protection is opened in formation；
Specifically, setting protection corresponding with the failure occurred in phase modifier regional scope is that phase modifier opens the differential guarantor of machine
Shield, protection corresponding with the failure occurred in exciting transformer regional scope is that exciting transformer opens machine differential protection, above-mentioned
Both protections can be realized using the prior art, not do excessive repeat in the application；
Setting protection corresponding with the failure occurred in main transformer regional scope is that main transformer opens machine current quick；Such as
Shown in Fig. 1, F1 and F2 in figure refer to Fault 1 and Fault 2, i.e. fault point 1 and fault point 2, i.e., occur in fault point
Dead-zone fault when dead zone area between grid-connected breaker and grid-connected current mutual inductor, for characterize grid-connected breaker occur it is dead
The feature of fault current when area's failure, it is thus impossible to select the differential electricity of the current transformer of main transformer high-pressure side and low-pressure side
Stream is used as criterion electric current, because theoretical difference current is zero when grid-connected breaker dead-zone fault occurs, and because protected object
It is main transformer, therefore, the electric current of the electric current or phase modifier generator terminal side that select main transformer low-pressure side is as fault current.
In addition, main transformer, which opens machine current quick, to be protected in the process to main transformer troubles inside the sample space for opening machine
, protection scope includes full transformer range and grid-connected breaker dead-zone fault range, because opening machine process frequency and voltage
With it is grid-connected after frequency and voltage characteristic it is different, the machine process frequency of opening is a 0Hz frequency to more slightly higher than rated frequency one
A frequency change procedure, the machine process voltage of opening are a voltage change process of the 0V voltage to voltage rating, and frequency is in
Variation, therefore the current protection based on 50Hz power frequency feature is not applicable, due to long-time in low-voltage process,
The sensitivity of current protection movement based on 50Hz power frequency feature be also it is low compared with the protection sensitivity after grid-connected, so setting
" main transformer opens machine current quick ", solution open the variation of machine process frequency, voltage magnitude it is low cause protection sensitivity low and
The problem of grid-connected breaker dead-zone fault.
To solve the problems, such as to open the variation of machine process frequency, main transformer opens machine current quick using algorithm unrelated with frequency.
To solve the problems, such as that protection sensitivity caused by voltage magnitude is low is low, main transformer opens machine current quick-breaking protection act threshold value and only needs to hide
It crosses static frequency changer (Static frequency converter, abridge SFC) and opens the maximum current of machine process injection, and guarantee
1.2~2.0 times of safety factor.To solve grid-connected breaker dead-zone fault, main transformer opens machine current quick and does not use main transformer
The difference current of depressor high-pressure side and low-pressure side, but use main transformer low-pressure side electric current or electric using phase modifier generator terminal side
Stream.
Dashed rectangle zone current mutual inductor as shown in Figure 2, i.e. Current Transmit 4.1 and CT4.2, when opening machine process
The maximum phase current for meeting the current transformer of main transformer low-pressure side and/or phase modifier generator terminal side is greater than the current quick-breaking of setting
Definite value, then it is assumed that it has the feature that main transformer troubles inside the sample space occurs, and determines to break down in main transformer regional scope.
The investment criterion that main transformer opens machine current quick is: grid-connected breaker is in quartile while meeting generator terminal
(i.e. main transformer high-pressure side low voltage condition or main transformer low-pressure side/phase modifier generator terminal is low for low frequency or low voltage condition
Voltage conditions), but also meet grid-connected breaker no current condition simultaneously；Specifically, as shown in figure 3, low voltage condition is with machine
Hold voltage for, when the either condition of satisfaction " set end voltage is low " and " generator terminal frequency is low ", at the same meet " breaker quartile " and
" main transformer high voltage side current meets without stream condition (i.e. grid-connected breaker no current condition) " then meets " opening machine protection investment condition ".
The criterion that exits that the main transformer opens machine current quick is: grid-connected breaker is in coincidence or is unsatisfactory for
Low-voltage (i.e. main transformer high-pressure side low voltage condition or main transformer low-pressure side/phase modifier generator terminal low voltage condition), tool
Body, as shown in figure 4, low voltage condition is by taking set end voltage as an example, when meeting " breaker coincidence " simultaneously and " set end voltage is not
It is low " two conditions then meet " opening machine protection exit criteria ".
Further, in the present invention, scene is accessed in three kinds of positions of the condition of the differentiation of the grid-connected breaker quartile point
It carries out:
The first scene is: only grid-connected breaker quartile position is accessed, and is indicated to be in when quartile location status is 1 and be divided
Position；Second of scene is: only grid-connected breaker coincidence position is accessed, and indicates to be in quartile when coincidence location status is 0；Third
Kind scene is: when grid-connected breaker two-position is accessed, indicating when quartile position is 1, and coincidence position is 0 in quartile.
Further, three kinds of position access scenes of the condition of the differentiation of the grid-connected breaker coincidence point carry out:
The first scene is: only grid-connected breaker quartile position is accessed, and is indicated when quartile location status is 0 in conjunction
Position；Second of scene is: only grid-connected breaker coincidence position is accessed, and indicates to be in coincidence when coincidence location status is 1；Third
Kind scene is: when grid-connected breaker two-position is accessed, indicating when quartile position is 0, and coincidence position is 1 in coincidence.
The voltage low condition refers to: voltage is less than setting voltage value, which should be less than voltage rating, and
Escape minimum voltage value when system operates normally.
Low condition does not refer to the set end voltage: set end voltage is more than or equal to setting voltage value, the setting voltage
Value should be less than voltage rating, and escape minimum voltage value when system operates normally.
The generator terminal frequency low condition refers to: generator terminal frequency be less than setpoint frequency value, the setpoint frequency value should be less than be
System rated frequency, and escape lowest frequency value when system operates normally.
Further, the grid-connected breaker no current condition (i.e. main transformer high voltage side current meets without stream condition), refers to
Be: the current transformer electric current of the whole grid-connected breaker side of main transformer is all satisfied no current condition, i.e. main transformer high-pressure side is opened
Powered-down stream is respectively less than setting electric current value, and setting electric current value is usually set to 0.01~0.06 times specified by precise work current consideration
Electric current.If phase modifier transformer group is directly to connect the mode of bus, then it is that bus is connect by single grid-connected breaker, then accesses bus
The current transformer electric current of breaker need to meet no stream condition；If phase modifier transformer group is by 3/2 breaker bus
String mode access, as shown in Figure 1, then the current transformer electric current of two grid-connected breakers is both needed to meet without stream condition, i.e. CT1 is needed
Meet without stream condition, CT2 also needs to meet simultaneously no stream condition and just calculates satisfaction " main transformer high voltage side current satisfaction is without the condition of stream ".
As shown in figure 5, selection " opens machine protection investment item when previous condition " main transformer opens machine protection investment summer condition " is 0
Part " branch's current state as " main transformer open machine protection investment summer condition " conditions present differentiation, at this time when " open machine protection investment
When condition " is 0, " main transformer opens machine protection investment summer condition " is 0, and subsequent time continues selection " opening machine protection investment condition " branch
Criterion as " main transformer opens machine protection investment summer condition "；When " opening machine protection investment condition " is 1 and continue
Time is more than time definite value t, and " main transformer opens machine protection investment summer condition " is just 1, and subsequent time selection " opens machine protection and exits item
Criterion of the part " branch as " main transformer opens machine protection investment summer condition ".
As shown in figure 5, selection " opens machine protection and exits item when previous condition " main transformer opens machine protection investment summer condition " is 1
Part " branch's current state as " main transformer open machine protection investment summer condition " conditions present differentiation, at this time when " open machine protection exit
When condition " is 0, " main transformer opens machine protection investment summer condition " is 1, and subsequent time continues selection " opening machine protection exit criteria " branch
Criterion as " main transformer opens machine protection investment summer condition "；When " opening machine protection exit criteria " is 1 and continue
Time is more than time definite value t, and " main transformer opens machine protection investment summer condition " is just 0, and subsequent time selection " opens machine protection investment item
Criterion of the part " branch as " main transformer opens machine protection investment summer condition ".
As shown in fig. 6, the logic that main transformer opens machine current quick is when main transformer low-pressure side electric current maximum phase current
It is big greater than setting electric current value (i.e. an at least phase current is greater than setting electric current value) or phase modifier generator terminal side electric current maximum phase current
In setting electric current value (i.e. an at least phase current is greater than setting electric current value), while meeting " main transformer opens machine protection investment summer condition " and being
1 condition is set delay, and delay time may be set to 0, that is, is judged as that main transformer opens machine current quick-breaking protection act.
(2) setting phase modifier opens machine overcurrent protection as the above-mentioned back-up protection for opening owner's protection；
The phase modifier is opened machine overcurrent protection and can be realized using the prior art, does not do excessive go to live in the household of one's in-laws on getting married in the application
It states；
(3) after determining fault type, start corresponding protection, it is complete to realize that phase modifier transformer group opens machine process
Open machine protection in region；
Specifically, when the failure for judging to occur in main transformer region, then start main transformer and open machine current quick
For protecting；When the failure for judging to occur in phase modifier region, then starts phase modifier and open machine differential protection and protected；When
Judge to be the failure occurred in exciting transformer region, then starts exciting transformer and open machine differential protection for protecting；Currently
State open owner protection when something goes wrong, starting phase modifier open machine overcurrent protection as it is above-mentioned open owner protection back-up protection, with
Improve stability of the invention.
In summary:
It is suitable for phase modifier transformer group the invention discloses one kind and opens that machine process is region-wide to open machine guard method, it is comprehensive
The characteristics of using the grid-connected circuit breaker position contact state of machine process and frequency, electric current, voltage electric amount is opened, proposing one kind includes
The machine that opens of phase modifier transformer group gamut including grid-connected breaker dead-zone fault is protected, wherein solving grid-connected breaker dead zone
Failure opens machine current quick using main transformer, and main transformer opens machine current quick and puts into during opening machine, and investment is sentenced
Other condition is that grid-connected breaker is in quartile while meeting generator terminal low frequency or low voltage condition, but also meets simultaneously grid-connected
Breaker no current condition, exiting criterion is that grid-connected breaker is in coincidence or is unsatisfactory for two items of generator terminal low-voltage
Either condition in part, electric current are not adopted using main transformer low-pressure side current transformer or the electric current of phase modifier generator terminal current transformer
With the difference current of main transformer high-pressure side and low-pressure side current transformer；Main transformer opens the investment condition of machine current quick-breaking, exit criteria
And current transformer selection so that its protection scope containing the main transformer entire area model including grid-connected breaker dead zone range
It encloses.Simultaneously by opening machine current quick for protecting the failure occurred in main transformer regional scope, it is poor that phase modifier opens machine
For protecting the failure occurred in phase modifier regional scope, exciting transformer opens machine differential protection for protecting excitation-transformation variable for dynamic protection
The failure occurred in depressor regional scope, phase modifier open machine overcurrent protection as the above-mentioned back-up protection for opening owner's protection, pass through 3
It is a to open owner's protection and 1 cooperation realization for opening machine back-up protection opens the protection of machine process phase modifier transformer group without dead zone range
The protection of region-wide range.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. one kind, which is suitable for phase modifier transformer group, opens that machine process is region-wide to open machine guard method, which is characterized in that including with
Lower step:
(1) to the failure occurred in main transformer regional scope, the failure occurred in phase modifier regional scope, exciting transformer area
Corresponding protection is set separately in the failure occurred within the scope of domain, and owner's protection is opened in formation；
(2) setting phase modifier opens machine overcurrent protection as the above-mentioned back-up protection for opening owner's protection；
(3) after determining fault type, start corresponding protection, it is region-wide to realize that phase modifier transformer group opens machine process
Open machine protection；
In the step (1), protection corresponding with the failure occurred in main transformer regional scope is that main transformer opens machine current quick-breaking
Protection；
Select the electric current of main transformer low-pressure side current transformer or phase modifier generator terminal side current transformer as fault current, when
The maximum phase current that the machine process of opening meets the current transformer of main transformer low-pressure side and/or phase modifier generator terminal side is greater than setting
Current quick-breaking definite value, then it is assumed that it has the feature that main transformer troubles inside the sample space occurs, and determines hair in main transformer regional scope
Raw failure；
The investment criterion that main transformer opens machine current quick is: grid-connected breaker is in quartile, at the same meet low frequency or
Low voltage condition, but also meet grid-connected breaker no current condition simultaneously；The low voltage condition refers to main transformer height
Press side low voltage condition or main transformer low-pressure side/phase modifier generator terminal low voltage condition；
The criterion that exits that the main transformer opens machine current quick is: grid-connected breaker is in coincidence or is unsatisfactory for low electricity
Press strip part, the low voltage condition refer to main transformer high-pressure side low voltage condition or main transformer low-pressure side/phase modifier
Generator terminal low voltage condition.
2. one kind according to claim 1 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that: three kinds of position access scenes of the condition of the differentiation of the grid-connected breaker quartile point carry out:
The first scene is: only grid-connected breaker quartile position is accessed, and indicates to be in quartile when quartile location status is 1；
Second of scene is: only grid-connected breaker coincidence position is accessed, and indicates to be in quartile when coincidence location status is 0；
The third scene is: when the access of grid-connected breaker two-position, indicating to be in when quartile position is 1, and coincidence position is 0 and divide
Position.
3. one kind according to claim 1 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that: three kinds of position access scenes of the condition of the differentiation of the grid-connected breaker coincidence point carry out:
The first scene is: only grid-connected breaker quartile position is accessed, and indicates to be in coincidence when quartile location status is 0；
Second of scene is: only grid-connected breaker coincidence position is accessed, and indicates to be in coincidence when coincidence location status is 1；
The third scene is: when grid-connected breaker two-position is accessed, indicating to be in when quartile position is 0, and coincidence position is 1 and close
Position.
4. one kind according to claim 1 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that: the low voltage condition refers to: main transformer high side voltage or main transformer low-pressure side/phase modulation
Machine set end voltage is less than setting voltage value, which should be less than voltage rating, and escapes minimum when system operates normally
Voltage value.
5. one kind according to claim 1 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that: be unsatisfactory for low voltage condition and refer to: main transformer high side voltage and main transformer low-pressure side/phase modulation
Machine set end voltage is more than or equal to setting voltage value, which should be less than voltage rating, and escapes system and normally transport
Minimum voltage value when row.
6. one kind according to claim 1 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that: the low frequency condition refers to: generator terminal frequency is less than setpoint frequency value, which should be less than
System nominal frequency, and escape lowest frequency value when system operates normally.
7. one kind according to claim 1 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that: the grid-connected breaker no current condition refers to: the electric current of the whole grid-connected breaker side of main transformer is mutual
Sensor electric current is all satisfied no current condition, i.e. main transformer high side switch electric current is respectively less than setting electric current value.
8. one kind according to claim 1 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that: protection corresponding with the failure occurred in phase modifier regional scope is that phase modifier opens machine differential protection, and is encouraged
The corresponding protection of the failure occurred in magnetic transformer regional scope is that exciting transformer opens machine differential protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035592.9A CN108336717B (en) | 2018-01-15 | 2018-01-15 | One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035592.9A CN108336717B (en) | 2018-01-15 | 2018-01-15 | One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108336717A CN108336717A (en) | 2018-07-27 |
| CN108336717B true CN108336717B (en) | 2019-08-16 |
Family
ID=62924226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810035592.9A Active CN108336717B (en) | 2018-01-15 | 2018-01-15 | One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108336717B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659962B (en) * | 2018-12-12 | 2022-03-04 | 国家电网有限公司 | Fault current calculation method for large phase modulator |
| CN110718896B (en) * | 2019-08-16 | 2022-03-29 | 南京南瑞继保工程技术有限公司 | Short-circuit fault protection method and device in variable-frequency starting process of phase modulator |
| CN111355218B (en) * | 2020-04-07 | 2022-03-29 | 南京南瑞继保电气有限公司 | Protection method and device for low-frequency starting process of generator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202424144U (en) * | 2011-12-31 | 2012-09-05 | 山西省电力公司长治供电分公司 | Rapid fault cutting-off device of low-voltage side of main transformer |
-
2018
- 2018-01-15 CN CN201810035592.9A patent/CN108336717B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202424144U (en) * | 2011-12-31 | 2012-09-05 | 山西省电力公司长治供电分公司 | Rapid fault cutting-off device of low-voltage side of main transformer |
Non-Patent Citations (1)
| Title |
|---|
| 300 Mvar 大型同步调相机的启动及继电保护;邹东霞等;《电力系统保护与控制》;20161016;第44卷(第20期);第160-164页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108336717A (en) | 2018-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lai et al. | Comprehensive protection strategy for an islanded microgrid using intelligent relays | |
| Novosel et al. | IEEE PSRC report on performance of relaying during wide-area stressed conditions | |
| CN108336717B (en) | One kind being suitable for phase modifier transformer group and opens that machine process is region-wide to open machine guard method | |
| CN106684824B (en) | A kind of transformer differential protection method and device based on current transformer circuit supervision fail | |
| KR101050605B1 (en) | Reclosing control system considering superconducting fault current limiter and its control method | |
| CN108321774A (en) | A kind of distribution automation controls on the spot and central controlled combined optimization method | |
| CN108963974B (en) | A kind of method and device preventing external area error excision differential protection malfunction | |
| CN108493903B (en) | Voltage-free energy-pumping reactor differential protection method and device | |
| CN116780747B (en) | Method for improving action accuracy rate during disconnection of sectional spare power automatic switching voltage | |
| CN101714779B (en) | Directional current based shutting method of high-speed switching device of industrial enterprise power supply | |
| CN110346678A (en) | A kind of method of quick lookup direct current system multipoint earth faults | |
| CN109521332A (en) | Fault handling method, apparatus and system | |
| CN110932228B (en) | Centralized reclosing method under breaker failure condition | |
| CN114355250A (en) | Detection apparatus based on low-voltage electrical fault | |
| CN109412256B (en) | Standby power supply switching method and device | |
| CN109742845B (en) | Rapid switching-on method of power supply rapid switching-off device based on optimal phase | |
| CN106992598B (en) | Implementation method for simplifying spare power automatic switching start-up discrimination logic | |
| CN105322512B (en) | A kind of micro-capacitance sensor guard method based on self study | |
| CN206226107U (en) | A kind of industrial undisturbed safety control | |
| Li et al. | Protection operation sequences and risks in ac/dc line touch fault | |
| CN206440755U (en) | Two three-phase ganged air switches electromagnetic potential transformer measuring loop in parallel | |
| CN109683044A (en) | Power switchgear malfunction judgment method based on multi-source information | |
| CN219086878U (en) | Dual-power automatic switching circuit | |
| CN109103848A (en) | A kind of system and method for generator injected type ground protection conk-out protection | |
| CN214590611U (en) | System for reducing starting and standby variable air load loss of power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |