CN111509999A - Operation control method, device and medium for prolonging service life of defective tap changer - Google Patents
Operation control method, device and medium for prolonging service life of defective tap changer Download PDFInfo
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- CN111509999A CN111509999A CN202010175524.XA CN202010175524A CN111509999A CN 111509999 A CN111509999 A CN 111509999A CN 202010175524 A CN202010175524 A CN 202010175524A CN 111509999 A CN111509999 A CN 111509999A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/043—Conversion of ac power input into dc power output without possibility of reversal by static converters using transformers or inductors only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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Abstract
The invention discloses an operation control method for prolonging the service life of a defective tap switch, which is characterized in that when the trigger angle of the inversion side of a direct current system is ensured to meet the preset safe operation condition, the action interval time of the defective tap switch is increased; wherein the preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle cannot be continuously less than 120 degrees within a preset time length. And after the action interval time of the defective tap changer is increased, sending a tap changer action command to control the defective tap changer to act according to the increased action interval time. The invention also discloses a corresponding operation control device and a medium, and by implementing the embodiment of the invention, the action times of the tap changer can be effectively reduced under the condition that the defective tap changer still can be operated under the condition that the defective tap changer cannot be replaced in time, so that the service life of the tap changer is prolonged, and the safe and stable operation of a system is ensured.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to an operation control method, device and medium for prolonging the service life of a defective tap switch.
Background
The direct current converter transformer is an important component in direct current engineering and has the function of transforming alternating current voltage into voltage class suitable for a direct current converter. The tap switch of the converter transformer adjusts the primary/secondary side turn ratio of the converter transformer by adjusting the position of the secondary side tap of the converter transformer so as to adjust the secondary side voltage, so that the trigger angle of the direct current system is in a certain safe operation range.
In actual operation of a dc system, a tap changer may be defective, such as cracked, in which case the defective tap changer can still operate, but in an unsafe condition. If the system still operates according to the original operation state at this moment, the cracks of the defect tap changer are further increased, and finally the defect tap changer is unusable, so that the safe and stable operation of the direct current system is seriously influenced. At present, when a condition that a tap changer has defects is met, the tap changer is usually directly replaced to ensure the normal operation of a direct current system.
However, in the process of implementing the invention, the inventor finds that the prior art has at least the following problems: the direct replacement of the defective tap changer is high in cost and not beneficial to resource utilization. And when the conditions that equipment is purchased and the production period is long, a manufacturer cannot respond to replacement quickly, or a plurality of devices have defects simultaneously, and all the defective tap changers cannot be replaced in time are met, the defective tap changers are operated according to the original mode, and the stable operation of the direct current system is influenced.
Disclosure of Invention
The invention aims to provide an operation control method, an operation control device and an operation control medium for prolonging the service life of a defective tap changer, which can effectively reduce the action times of the tap changer under the condition that the defective tap changer still can be operated even though the defective tap changer cannot be replaced in time, so that the service life of the tap changer is prolonged, and the safe and stable operation of a system is ensured.
In order to achieve the above object, an embodiment of the present invention provides an operation control method for prolonging a service life of a defective tap changer, including:
when the trigger angle of the inversion side of the direct current system is ensured to meet the preset safe operation condition, the action interval time of the defect tap switch is increased; wherein the defective tap changer represents a tap changer that is defective but still functional; the preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle cannot be continuously less than 120 degrees within a preset time length;
and after the action interval time of the defective tap changer is increased, sending a tap changer action command to control the defective tap changer to act according to the increased action interval time.
As an improvement of the above, after increasing the time interval between actions of the defective tap changer, the method further includes:
increasing an action monitoring time of a tap of the defective tap changer such that the action monitoring time of the tap is greater than an action interval time of the defective tap changer.
As an improvement of the above, after increasing the time interval between actions of the defective tap changer, the method further includes:
calculating the time required by the direct current system to switch from the locking state to the standby state after the action interval time of the defective tap switch is increased and the time required by the standby switch to be switched into the locking state;
increasing the monitoring time of the locking standby of the direct current system so that the monitoring time of the locking standby is larger than the time required by the locking standby;
and increasing the monitoring time of a standby transfer lock of the direct current system so that the monitoring time of the standby transfer lock is larger than the time required by the standby transfer lock.
As an improvement of the above, after increasing the time interval between actions of the defective tap changer, the method further includes:
sending a first scheduling control instruction to adjust the operation mode of the direct current system; the first scheduling control instruction is used for controlling the direct-current system not to be in a 70% voltage reduction operation mode.
As an improvement of the above scheme, the first dispatch control instruction is further used for controlling the dc system to be put into a full-voltage operation mode or an 80% voltage reduction operation mode.
As an improvement of the above, after increasing the time interval between actions of the defective tap changer, the method further includes:
sending a second scheduling control instruction to adjust the restarting mode of the direct current system; and the second scheduling control instruction is used for controlling the direct-current system not to be put into a 70% voltage reduction restarting mode when a fault occurs.
As an improvement of the above scheme, the second scheduling control instruction is further used for controlling the direct current system to be put into a full-voltage restart mode or an 80% voltage reduction restart mode when the direct current system fails.
The embodiment of the invention provides an operation control device for prolonging the service life of a defective tap changer, which comprises an action interval time adjusting module and an action instruction sending module, wherein,
the action interval time adjusting module is used for increasing the action interval time of the defect tap switch when the trigger angle of the inversion side of the direct current system is ensured to meet the preset safe operation condition; wherein the defective tap changer represents a tap changer that is defective but still functional; the preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle cannot be continuously less than 120 degrees within a preset time length;
and the action instruction sending module is used for sending a tap changer action instruction after the action interval time of the defect tap changer is increased so as to control the defect tap changer to act according to the increased action interval time.
An embodiment of the present invention further provides an operation control apparatus for prolonging a lifetime of a defective tap changer, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor executes the computer program to implement the operation control method for prolonging the lifetime of a defective tap changer according to any one of the above-mentioned methods.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the operation control method for prolonging the lifetime of the defective tap switch according to any one of the above mentioned items.
Compared with the prior art, the operation control method, the operation control device and the operation control medium for prolonging the service life of the defective tap changer disclosed by the invention have the advantages that when the tap changer of a direct current system has defects and can still operate, when the trigger angle of the inversion side of the direct current system is ensured to meet the preset safe operation condition, the action interval time of the defective tap changer is increased, the defective tap changer is controlled to act according to the increased action interval time, and therefore the action times of the defective tap changer are reduced. After the action interval time of the defective tap switch is increased, the monitoring time of the tap and the monitoring time of the locking standby are correspondingly increased, and the running mode and the restarting mode of the direct current system are adjusted to ensure the normal and stable running of the system. Under the condition that the defective tap changer which still can operate cannot be replaced in time, the action time interval of the tap changer is increased, so that the action times of the tap changer are effectively reduced, the service life of the tap changer is prolonged, and the safe and stable operation of a system is ensured. Meanwhile, the utilization rate of the tapping switch is improved, and the cost is saved.
Drawings
Fig. 1 is a schematic flow chart illustrating steps of an operation control method for prolonging the service life of a defective tap changer according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating steps of a preferred operation control method for prolonging the service life of a defective tap changer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an operation control device for prolonging the service life of a defective tap changer according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of another operation control device for prolonging the service life of a defective tap changer according to a third embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a schematic flow chart illustrating steps of an operation control method for prolonging the service life of a defective tap changer according to an embodiment of the present invention. The operation control method for prolonging the service life of the defective tap changer provided by the first embodiment of the invention is implemented through steps S1 to S2:
s1, increasing the action interval time of the defect tap switch when the trigger angle of the inversion side of the direct current system is ensured to meet the preset safe operation condition; wherein the defective tap changer represents a tap changer that is defective but still functional; the preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle can not be continuously less than 120 degrees within a preset time length.
And S2, after the action interval time of the defective tap changer is increased, sending a tap changer action command to control the defective tap changer to act according to the increased action interval time.
In the direct current system, a tap switch of the converter transformer adjusts the primary/secondary side turn ratio of the converter transformer by adjusting the position of a secondary side tap of the converter transformer, and finally the secondary side voltage can be adjusted, so that the trigger angle of the inversion side of the direct current system is within a certain safe operation range, and the alternating current voltage is transformed into a voltage grade suitable for the direct current converter. The relationship among the direct current voltage, the alternating current voltage and the trigger angle is shown as the following formula:
Udi0＝1.35*E*cos(α)
wherein, Udi0Is a direct voltage, E is an alternating voltage, the value can be adjusted by adjusting the tap changer, and α is a trigger angle.
In the embodiment of the invention, when the tap changer of the converter transformer is checked to have defects such as cracks and the like and can still continuously operate, in order to prolong the service life of the continuous use of the defective tap changer, the action interval time T of the defective tap changer is increasedtransThe frequency of gear shifting actions of the defective tap changer in unit time is reduced, and cracks of the defective tap changer are prevented from being increased.
Specifically, the service condition of each tap switch in the direct current system is detected by checking the tap switch of the converter transformer of the direct current system periodically or checking the tap switch according to an emergency situation. Whether the direct current system has the defect tap switch or not can be judged by obtaining the service condition report file of the tap switch, and the action interval time of the defect tap switch is increased when the defect tap switch is judged to exist; the service condition of the inspected tap changer can be directly input by a user, for example, when the direct current system has a defective tap changer, the action interval time of the defective tap changer is increased according to a control instruction input by the user, and the beneficial effects obtained by the invention are not influenced.
Time interval T between actions of defective tap changertransThe actual operation condition of the system is considered in the step length increase, and the requirement that the trigger angle of the inverter side can still operate within a certain safe operation range is met, so that the normal operation of a direct current system is ensured. The preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle can not be continuously less than 120 degrees within a preset time length. The preset time period may be set according to an actual condition of the operation of the dc system, for example, the preset time period is 18 s.
In the process of increasing the action interval time of the defective tap changer, in order to enable the trigger angle on the inversion side to meet the safe operation condition, the direct current power regulation process, such as power limitation, frequency limitation, restarting and the like, needs to be considered, so that the trigger angle on the inversion side meets the safe operation condition. By way of example, the increased inter-active time of the defective tap changer does not affect the normal power regulation and fast settling time of the system. The tap changer is continuously adjusted for an interval of 3 to 3.5 minutes (corresponding to a single pole of 300MW to 350MW) calculated for a normal power adjustment of 100 MW/min. And if the lifting speed under the normal condition is less than 100MW/min, the action interval time of the tap changer for continuous adjustment is more than 3.5 minutes. The time between the continuous adjustment of the tap changer was set to 20s, calculated as the limit power adjustment of the system at 999 MW/min. It should be noted that the specific value of the increased action interval time is determined according to the operation condition and the operation requirement of the actual project, and is not specifically limited herein.
When the action interval time T of the defective tap changer is increasedtransAnd then, sending a tapping switch action command to the defect tapping switch so as to control the defect tapping switch to perform tap shifting action according to the increased action interval time as a time interval.
In the embodiment of the invention, the action interval time T of the defective tap changer is increasedtransThe number of actions per unit time is reduced, and the service life of the defective tap changer can be prolonged. Meanwhile, conductive foreign matters possibly existing in the insulating oil of the tap changer have more sufficient dispersion time, so that the possibility of oil gap breakdown in operation is reduced.
Referring to fig. 2, a flowchart of steps of a preferred operation control method for prolonging the lifetime of a defective tap changer is shown according to an embodiment of the present invention. As a preferred embodiment, after step S1, the method further includes step S3:
and S3, increasing the action monitoring time of the tap of the defect tap changer so that the action monitoring time of the tap is larger than the action interval time of the defect tap changer.
When the action interval time T of the defective tap changer is increasedtransThen, the operation monitoring time T of the tap is also requiredmoni1Synchronous modification is performed to meet the time coordination inside the system control logic. In the tap control logic, after the tap switch action command is issued, the control protection program monitors whether the tap switch is actuated within a specified time, and if the tap switch is not actuated, the operation fault exists. Increases the action time interval T of the tap changertransThen, if the monitoring time T of the tap is not modified correspondinglymoni1The control protection program will be frequently reported in error.
Thus, the time interval T between the actions of the defective tap changer is increasedtransThen, the operation monitoring time T of the tap is increasedmoni1So that it satisfies Tmoni1>TtransThereby further ensuring the normal operation of the direct current system.
Referring to fig. 2, as a preferred embodiment, after step S1, step S4 is further included; wherein, the step S4 is divided into steps S41 to S42:
s41, calculating the time required by the direct current system to switch from the locking state to the standby state and the time required by the standby switching state after the action interval time of the defective tap switch is increased;
s42, increasing the monitoring time of the locking standby of the direct current system so that the monitoring time of the locking standby is larger than the time required by the locking standby; and increasing the monitoring time of a standby transfer lock of the direct current system so that the monitoring time of the standby transfer lock is larger than the time required by the standby transfer lock.
When the action interval time T of the defective tap changer is increasedtransThen, a monitoring time T for the latch-up of the DC system is requiredmoni2And monitoring time T of standby transfer lockmoni3Synchronous modification is performed to meet the time coordination inside the system control logic.
In the process of locking to standby, the tap switch is actuated for a plurality of times, because of the time interval T of each actuationtransGrow, thus if not modify, closeIf the lock is switched to standby for monitoring, the time required for switching to standby will exceed the monitoring time in the program, resulting in failure of the sequence control. Therefore, the time T between actions of the dc system in increasing the defective tap changer needs to be calculatedtransTime T required for subsequent lock transferblk2stbAnd increasing the monitoring time T of the latch switch back-upmoni2So that it satisfies Tmoni2>Tblk2stbThereby further ensuring the normal operation of the direct current system. Similarly, the time required by the standby transfer lock is calculated, and the monitoring time T of the standby transfer lock is increasedmoni3So that it is greater than the time required for the standby twist lock.
Referring to fig. 2, as a preferred embodiment, after step S1, step S5 is further included:
s5, sending a first scheduling control instruction to adjust the running mode of the direct current system; the first scheduling control instruction is used for controlling the direct-current system not to be in a 70% voltage reduction operation mode.
Preferably, the first scheduling control instruction is further used for controlling the direct current system to be in a full-voltage operation mode or an 80% voltage reduction operation mode.
As a preferred embodiment, after step S1, the method further includes step S6:
s6, sending a second scheduling control instruction to adjust the restarting mode of the direct current system; and the second scheduling control instruction is used for controlling the direct-current system not to be put into a 70% voltage reduction restarting mode when a fault occurs.
Preferably, the second scheduling control instruction is further used for controlling the direct current system to be put into a full-voltage restart mode or an 80% voltage reduction restart mode when the direct current system fails.
Increasing the time interval T between actuations of said defective tap changertransThen, if the dc system is controlled to be in the 70% step-down operation mode or the 70% step-down restart mode, a time that the trigger angle of the inverter side is less than 120 ° may be prolonged, which may cause a risk of a large angle monitoring action. Therefore, a 70% buck operating mode and a 70% buck restart mode should be avoided. By sending a first scheduling control instructionWhen the direct current system normally operates, controlling the direct current system not to be in a 70% voltage reduction operation mode, and controlling the direct current system to be in a full-voltage operation mode or an 80% voltage reduction operation mode; by sending a second scheduling control instruction, when the direct current system needs to be restarted in a fault, the direct current system is controlled not to be in a 70% voltage reduction restarting mode, and is controlled to be in a full voltage restarting mode or an 80% voltage reduction restarting mode, so that the trigger angle of the inversion side of the direct current system can be ensured to meet the safe operation condition all the time, and the normal operation of the direct current system is ensured.
It should be noted that, in the first embodiment of the present invention, the execution sequence of steps S3 to S6 may be replaced with each other, or may be performed simultaneously, without affecting the beneficial effect of the present invention.
When a tap switch of a direct current system is in fault but still can operate, when an inverter side trigger angle of the direct current system meets a preset safe operation condition, the action interval time of the defect tap switch is increased, and the defect tap switch is controlled to act according to the increased action interval time, so that the action times of the defect tap switch are reduced. After the action interval time of the defective tap switch is increased, the monitoring time of the tap and the monitoring time of the locking standby are correspondingly increased, and the running mode and the restarting mode of the direct current system are adjusted to ensure the normal and stable running of the system. Under the condition that the defective tap changer which still can operate cannot be replaced in time, the action time interval of the tap changer is increased, so that the action times of the tap changer are effectively reduced, the service life of the tap changer is prolonged, and the safe and stable operation of a system is ensured. Meanwhile, the utilization rate of the tapping switch is improved, and the cost is saved.
Example two
Fig. 3 is a schematic structural diagram of an operation control device for prolonging the service life of a defective tap changer according to a second embodiment of the present invention. The operation control device 20 for prolonging the service life of the defective tap changer according to the embodiment of the present invention comprises an action interval time adjusting module 21 and an action instruction sending module 22, wherein,
the action interval time adjusting module 21 is configured to increase the action interval time of the defective tap changer when the inverter-side trigger angle of the dc system is ensured to meet a preset safe operation condition; wherein the defective tap changer represents a tap changer that is defective but still functional; the preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle cannot be continuously less than 120 degrees within a preset time length;
the action instruction sending module 22 is configured to send a tap changer action instruction after increasing the action interval time of the defective tap changer, so as to control the defective tap changer to act according to the increased action interval time.
Further, the operation control device 20 for prolonging the service life of the defective tap changer further comprises a monitoring time adjusting module 23; wherein, the monitoring time adjusting module 23 is configured to increase the operation monitoring time of the tap of the defective tap changer so that the operation monitoring time of the tap is longer than the operation interval time of the defective tap changer.
Preferably, the monitoring time adjusting module 23 is further configured to:
calculating the time required by the direct current system for locking to be switched to standby after the action interval time of the defective tap switch is increased; and increasing the monitoring time of the locking standby of the direct current system so that the monitoring time of the locking standby is larger than the time required by the locking standby.
Further, the operation control device 20 for prolonging the service life of the defective tap changer further comprises a system mode adjusting module 24; the system mode adjusting module 24 is configured to send a first scheduling control instruction to adjust an operation mode of the dc system; the first scheduling control instruction is used for controlling the direct-current system not to be in a 70% voltage reduction operation mode.
Preferably, the first scheduling control instruction is further used for controlling the direct current system to be in a full-voltage operation mode or an 80% voltage reduction operation mode.
Preferably, the system mode adjusting module 24 is further configured to send a second scheduling control instruction to adjust a restart mode of the dc system; and the second scheduling control instruction is used for controlling the direct-current system not to be put into a 70% voltage reduction restarting mode.
Preferably, the second scheduling control instruction is further used for controlling the direct current system to be put into a full-voltage restart mode or an 80% voltage reduction restart mode.
It should be noted that the operation control device for prolonging the service life of the defective tap changer according to the embodiment of the present invention is used to execute all the process steps of the operation control method for prolonging the service life of the defective tap changer according to the embodiment, and the working principles and beneficial effects of the two are in one-to-one correspondence, so that no further description is provided.
According to the operation control device for prolonging the service life of the defective tap changer, when the tap changer of the direct current system has defects but can still operate, when the trigger angle of the inversion side of the direct current system is ensured to meet the preset safe operation condition, the action interval time of the defective tap changer is increased, the defective tap changer is controlled to act according to the increased action interval time, and therefore the action times of the defective tap changer are reduced. After the action interval time of the defective tap switch is increased, the monitoring time of the tap and the monitoring time of the locking standby are correspondingly increased, and the running mode and the restarting mode of the direct current system are adjusted to ensure the normal and stable running of the system. Under the condition that the defective tap changer which still can operate cannot be replaced in time, the action time interval of the tap changer is increased, so that the action times of the tap changer are effectively reduced, the service life of the tap changer is prolonged, and the safe and stable operation of a system is ensured. Meanwhile, the utilization rate of the tapping switch is improved, and the cost is saved.
EXAMPLE III
Fig. 4 is a schematic structural diagram of an operation control device for prolonging the service life of a defective tap changer according to a third embodiment of the present invention. An operation control device 30 for prolonging the service life of a defective tap changer provided by the third embodiment of the present invention includes a processor 31, a memory 32, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the operation control method for prolonging the service life of a defective tap changer according to the first embodiment is implemented.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the operation control method for prolonging the service life of the defective tap switch according to the first embodiment.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An operation control method for prolonging the service life of a defective tap changer, comprising:
when the trigger angle of the inversion side of the direct current system is ensured to meet the preset safe operation condition, the action interval time of the defect tap switch is increased; wherein the defective tap changer represents a tap changer that is defective but still functional; the preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle cannot be continuously less than 120 degrees within a preset time length;
and after the action interval time of the defective tap changer is increased, sending a tap changer action command to control the defective tap changer to act according to the increased action interval time.
2. The method of operational control for extending the life of a defective tap changer of claim 1 wherein said increasing the time between actuations of said defective tap changer further comprises:
increasing an action monitoring time of a tap of the defective tap changer such that the action monitoring time of the tap is greater than an action interval time of the defective tap changer.
3. The method of operational control for extending the life of a defective tap changer of claim 1 wherein said increasing the time between actuations of said defective tap changer further comprises:
calculating the time required by the direct current system to switch from the locking state to the standby state after the action interval time of the defective tap switch is increased and the time required by the standby switch to be switched into the locking state;
increasing the monitoring time of the locking standby of the direct current system so that the monitoring time of the locking standby is larger than the time required by the locking standby;
and increasing the monitoring time of a standby transfer lock of the direct current system so that the monitoring time of the standby transfer lock is larger than the time required by the standby transfer lock.
4. The method of operational control for extending the life of a defective tap changer of any of claims 1-3 wherein said increasing the time between actuations of said defective tap changer further comprises:
sending a first scheduling control instruction to adjust the operation mode of the direct current system; the first scheduling control instruction is used for controlling the direct-current system not to be in a 70% voltage reduction operation mode.
5. The method of claim 4, wherein the first dispatch control command is further configured to control the DC system to be placed in a full-voltage mode of operation or an 80% buck mode of operation.
6. The method of operational control for extending the life of a defective tap changer of any of claims 1-3 wherein said increasing the time between actuations of said defective tap changer further comprises:
sending a second scheduling control instruction to adjust the restarting mode of the direct current system; and the second scheduling control instruction is used for controlling the direct-current system not to be put into a 70% voltage reduction restarting mode when a fault occurs.
7. The method of claim 6, wherein the second scheduled control command is further configured to control the DC system to be placed in a full-voltage restart mode or an 80% buck restart mode when the DC system fails.
8. An operation control device for prolonging the service life of a defective tap changer is characterized by comprising an action interval time adjusting module and an action instruction sending module, wherein,
the action interval time adjusting module is used for increasing the action interval time of the defect tap switch when the trigger angle of the inversion side of the direct current system is ensured to meet the preset safe operation condition; wherein the defective tap changer represents a tap changer that is defective but still functional; the preset safe operation condition is that the trigger angle is not less than 120 degrees, or the trigger angle cannot be continuously less than 120 degrees within a preset time length;
and the action instruction sending module is used for sending a tap changer action instruction after the action interval time of the defect tap changer is increased so as to control the defect tap changer to act according to the increased action interval time.
9. An operation control device for prolonging the service life of a defective tap changer, comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the operation control method for prolonging the service life of a defective tap changer according to any one of claims 1 to 7.
10. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the operation control method for prolonging the lifetime of a defective tap changer according to any one of claims 1 to 7.
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