CN108336717A - One kind opens that machine process is region-wide to open machine guard method suitable for phase modifier transformer group - Google Patents
One kind opens that machine process is region-wide to open machine guard method suitable for phase modifier transformer group Download PDFInfo
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- CN108336717A CN108336717A CN201810035592.9A CN201810035592A CN108336717A CN 108336717 A CN108336717 A CN 108336717A CN 201810035592 A CN201810035592 A CN 201810035592A CN 108336717 A CN108336717 A CN 108336717A
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- 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
Abstract
What the present invention proposed open suitable for phase modifier transformer group, and machine process is region-wide to open machine guard method, using the source of phase modifier transformer group dead-zone fault of the machine current quick solution when fault point is happened at the dead zone area between grid-connected breaker and grid-connected current mutual inductor is opened with main transformer, main transformer opens the electric current in machine current quick and 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 input condition, frequency, electric current and grid-connected breaker auxiliary contact information are as input 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 opened suitable for phase modifier transformer group
Machine process is region-wide to open machine guard method.
Background technology
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
It is that grid-connected breaker is in and closes position position or grid-connected current mutual inductor satisfaction and have stream condition to go out condition, 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.
Invention content
In view of the above-mentioned problems, the present invention proposes that one kind opening the region-wide machine that opens of machine process suitable for phase modifier transformer group and protects
Maintaining method, setting open machine process input condition using electric current, voltage, frequency and locality condition as criterion, and the machine process of opening exits
Condition, as criterion, in conjunction with two criterions above-mentioned, can realize that opening machine procedure fault point is happened at using voltage, locality condition
When dead zone area between grid-connected breaker and grid-connected current mutual inductor, opening machine protection reliably can rapidly act.
It realizes above-mentioned technical purpose, reaches above-mentioned technique effect, the invention is realized by the following technical scheme：
One kind opens that machine process is region-wide to open machine guard method suitable for phase modifier transformer group, includes the following steps：
(1) to the failure occurred in main transformer regional extent, the failure, the excitation transformation that occur in phase modifier regional extent
Corresponding protection is set separately in the failure occurred in device regional extent, 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 extent 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 more 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, judgement main transformer region model
It breaks down in enclosing.
Further, the input criterion that main transformer opens machine current quick is：Grid-connected breaker, which is in, divides position, 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, which is in, to be closed position 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, the grid-connected breaker divides three kinds of position access scenes of condition point of the differentiation of position to carry out：
The first scene is：Only grid-connected breaker divides position position to access, and indicates to be in when dividing position location status to be 1 and divide
Position；Second of scene be：Only grid-connected breaker conjunction position position access indicates to be in and divides position when closing position location status and being 0；Third
Planting scene is：When grid-connected breaker two-position is accessed, when dividing position position to be 1, closes to indicate to be in when position position is 0 and divide position.
Further, the grid-connected breaker closes three kinds of position access scenes progress of condition point of the differentiation of position：
The first scene is：Only grid-connected breaker divides position position to access, and is indicated in conjunction when dividing position location status to be 0
Position；Second of scene be：Only grid-connected breaker closes position position and accesses, and is indicated when closing position location status and being 1 in conjunction position；Third
Planting scene is：When grid-connected breaker two-position access, when dividing position position to be 0, closes and indicated when position position is 1 in conjunction position.
Further, the low voltage condition refers to：Voltage is less than setting voltage value, which should be less than volume
Constant voltage, and minimum voltage value when escaping system normal operation.
Further, low voltage condition is unsatisfactory for refer to：Voltage is more than or equal to setting voltage value, the setting voltage
Value should be less than rated voltage, and minimum voltage value when escaping system normal operation.
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 rated voltage, and when escaping system normal operation most
Low voltage value.
Further, low voltage condition is unsatisfactory for 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 rated voltage, 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 lowest frequency value when escaping system normal operation.
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 satisfied by 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 extent is that phase modifier opens machine differential protection,
Protection corresponding with the failure occurred in exciting transformer regional extent is that exciting transformer opens machine differential protection.
Compared with prior art, beneficial effects of the present invention：
What the present invention proposed open suitable for phase modifier transformer group, and machine process is region-wide to open machine guard method, utilizes tune
Machine current quick is opened with main transformer and is solved when fault point is happened at grid-connected breaker and grid-connected current in the source of camera transformer group
Dead-zone fault when dead zone area between mutual inductor, main transformer open the electric current in machine current quick and 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 input condition,
And grid-connected breaker auxiliary contact information is as input 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.
Description of the drawings
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 input 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 input summer condition logic chart；
Fig. 6 is that main transformer opens machine current quick-breaking relay protective scheme figure.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be 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.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
One kind opens that machine process is region-wide to open machine guard method suitable for phase modifier transformer group, includes the following steps：
(1) to the failure occurred in main transformer regional extent, the failure, the excitation transformation that occur in phase modifier regional extent
Corresponding protection is set separately in the failure occurred in device regional extent, and owner's protection is opened in formation；
Specifically, setting protection corresponding with the failure occurred in phase modifier regional extent is that phase modifier opens the differential guarantor of machine
Shield, protection corresponding with the failure occurred in exciting transformer regional extent is that exciting transformer opens machine differential protection, above-mentioned
The prior art may be used to realize in both protections, does not do excessive repeat in the application；
It is that main transformer opens machine current quick to set protection corresponding with the failure occurred in main transformer regional extent；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 when grid-connected breaker dead-zone fault occurs, theoretical difference current is zero, 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 domain 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 voltages to rated voltage, and frequency is in
Variation, therefore the current protection based on 50Hz power frequency features is not applicable, since long-time is in the process of low-voltage,
The sensitivity of current protection action based on 50Hz power frequency features is also 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 and uses 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 ensure
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 more 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 judges to break down in main transformer regional extent.
The input criterion that main transformer opens machine current quick is：Grid-connected breaker is in point position 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
For terminal voltage, when the either condition of satisfaction " set end voltage is low " and " generator terminal frequency is low ", while meet " breaker point position " and
" main transformer high voltage side current meets without stream condition (i.e. grid-connected breaker no current condition) " then meets " opening machine protection input condition ".
The criterion that exits that the main transformer opens machine current quick is：Grid-connected breaker, which is in, to be closed position 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 conjunction position " simultaneously and " set end voltage is not
It is low " two conditions then meet " opening machine protection exit criteria ".
Further, in the present invention, the grid-connected breaker divides three kinds of position access scenes of condition point of the differentiation of position
It carries out：
The first scene is：Only grid-connected breaker divides position position to access, and indicates to be in when dividing position location status to be 1 and divide
Position；Second of scene be：Only grid-connected breaker conjunction position position access indicates to be in and divides position when closing position location status and being 0；Third
Planting scene is：When grid-connected breaker two-position is accessed, when dividing position position to be 1, closes to indicate to be in when position position is 0 and divide position.
Further, the grid-connected breaker closes three kinds of position access scenes progress of condition point of the differentiation of position：
The first scene is：Only grid-connected breaker divides position position to access, and is indicated in conjunction when dividing position location status to be 0
Position；Second of scene be：Only grid-connected breaker closes position position and accesses, and is indicated when closing position location status and being 1 in conjunction position；Third
Planting scene is：When grid-connected breaker two-position access, when dividing position position to be 0, closes and indicated when position position is 1 in conjunction position.
The voltage low condition refers to：Voltage is less than setting voltage value, which should be less than rated voltage, and
Minimum voltage value when escaping system normal operation.
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 rated voltage, and minimum voltage value when escaping system normal operation.
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
It unites rated frequency, and lowest frequency value when escaping system normal operation.
Further, the grid-connected breaker no current condition (i.e. main transformer high voltage side current meets without stream condition), refers to
It is：The current transformer electric current of the whole grid-connected breaker side of main transformer is satisfied by 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 busbar, then it is that busbar is connect by single grid-connected breaker, then accesses busbar
The current transformer electric current of breaker need to meet no stream condition；If phase modifier transformer group is by 3/2 breaker busbar
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, when previous condition " main transformer opens machine protection input summer condition " is 0, selection " opens machine protection input item
Part " branch's current state as " main transformer open machine protection input summer condition " conditions present differentiation, at this time when " open machine protection input
When condition " is 0, " main transformer opens machine protection input summer condition " is 0, and subsequent time continues selection " opening machine protection input condition " branch
Criterion as " main transformer opens machine protection input summer condition "；When " opening machine protection input condition " is 1 and continue
Time is more than time definite value t, and " main transformer opens machine protection input 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 input summer condition ".
As shown in figure 5, when previous condition " main transformer opens machine protection input summer condition " is 1, selection " opens machine protection and exits item
Part " branch's current state as " main transformer open machine protection input summer condition " conditions present differentiation, at this time when " open machine protection exit
When condition " is 0, " main transformer opens machine protection input summer condition " is 1, and subsequent time continues selection " opening machine protection exit criteria " branch
Criterion as " main transformer opens machine protection input summer condition "；When " open machine and protect exit criteria " is 1 and continue
Time is more than time definite value t, and " main transformer opens machine protection input summer condition " is just 0, and subsequent time selection " opens machine protection input item
Criterion of the part " branch as " main transformer opens machine protection input summer condition ".
As shown in fig. 6, the logic that main transformer opens machine current quick is to work as main transformer low-pressure side electric current maximum phase current
It is big more than setting electric current value (i.e. an at least phase current is more 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 more than setting electric current value), while meeting " main transformer opens machine protection input 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 opens machine overcurrent protection and the prior art may be used to realize, 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 it is 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, start phase modifier open machine overcurrent protection as it is above-mentioned open owner protection back-up protection, with
Improve the stability of the present invention.
In summary：
Being suitable for phase modifier transformer group the invention discloses one kind and open that machine process is region-wide to open machine guard method, integrates
The characteristics of using the grid-connected circuit breaker position contact state of machine process and frequency, electric current, voltage electric amount is opened, it is proposed that 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 put into during opening machine, and input is sentenced
Other condition is that grid-connected breaker is in point position while meeting generator terminal low frequency or low voltage condition, but also meets simultaneously grid-connected
Breaker no current condition, it is that grid-connected breaker is in conjunction position or is unsatisfactory for two items of generator terminal low-voltage to exit criterion
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 input condition of machine current quick-breaking, exit criteria
And the selection of current transformer makes its protection domain 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 extent, it is poor that phase modifier opens machine
Dynamic protection is for protecting the failure occurred in phase modifier regional extent, exciting transformer to open machine differential protection for protecting excitation-transformation variable
The failure occurred in depressor regional extent, phase modifier open machine overcurrent protection as the above-mentioned back-up protection for opening owner's protection, pass through 3
It is a open owner protection and 1 open machine back-up protection cooperation realization open machine process phase modifier transformer group protection 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 (10)
1. one kind opens that machine process is region-wide to open machine guard method suitable for phase modifier transformer group, which is characterized in that including with
Lower step：
(1) to the failure occurred in main transformer regional extent, the failure occurred in phase modifier regional extent, 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.
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：In the step (1), protection corresponding with the failure occurred in main transformer regional extent is opened for main transformer
Machine current quick；
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 more 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 is sent out in judgement main transformer regional extent
Raw failure.
3. one kind according to claim 2 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 input criterion that main transformer opens machine current quick is：Grid-connected breaker be in divides position, while 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 conjunction position 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.
4. one kind according to claim 3 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 divides three kinds of position access scenes of condition point of the differentiation of position to carry out：
The first scene is：Only grid-connected breaker divides position position to access, and indicates to be in when point position location status is 1 and divides position；
Second of scene be：Only grid-connected breaker conjunction position position access indicates to be in and divides position when closing position location status and being 0；
The third scene is：When grid-connected breaker two-position is accessed, when dividing position position to be 1, closes to indicate to be in when position position is 0 and divide
Position.
5. one kind according to claim 3 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 condition point that the grid-connected breaker closes the differentiation of position carry out：
The first scene is：Only grid-connected breaker divides position position to access, and is indicated when dividing position location status to be 0 in conjunction position；
Second of scene be：Only grid-connected breaker closes position position and accesses, and is indicated when closing position location status and being 1 in conjunction position；
The third scene is：When grid-connected breaker two-position access, when dividing position position to be 0, closes when position position is 1 and indicate in conjunction
Position.
6. one kind according to claim 3 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 rated voltage, and escape minimum when system normal operation
Voltage value.
7. one kind according to claim 3 is opened suitable for phase modifier transformer group, machine process is region-wide to open machine protection side
Method, it is characterised in that：Low voltage condition is unsatisfactory for 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 rated voltage, and escapes system and normally transport
Minimum voltage value when row.
8. one kind according to claim 3 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 lowest frequency value when escaping system normal operation.
9. one kind according to claim 3 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 satisfied by no current condition, i.e. main transformer high side switch electric current is respectively less than setting electric current value.
10. 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 extent is that phase modifier opens machine differential protection, and is encouraged
The corresponding protection of failure occurred in magnetic transformer regional extent is that exciting transformer opens machine differential protection.
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| 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 |
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| 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 |
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| CN108336717B CN108336717B (en) | 2019-08-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659962A (en) * | 2018-12-12 | 2019-04-19 | 国家电网有限公司 | A kind of fault current calculation method of large size phase modifier |
| CN110718896A (en) * | 2019-08-16 | 2020-01-21 | 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 |
| CN111355218A (en) * | 2020-04-07 | 2020-06-30 | 南京南瑞继保电气有限公司 | Protection method and device for low-frequency starting process of generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109659962A (en) * | 2018-12-12 | 2019-04-19 | 国家电网有限公司 | A kind of fault current calculation method of large size phase modifier |
| CN109659962B (en) * | 2018-12-12 | 2022-03-04 | 国家电网有限公司 | Fault current calculation method for large phase modulator |
| CN110718896A (en) * | 2019-08-16 | 2020-01-21 | 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 |
| CN111355218A (en) * | 2020-04-07 | 2020-06-30 | 南京南瑞继保电气有限公司 | Protection method and device for low-frequency starting process of generator |
| 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 |
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