CN114142484A - Method and system for running wheel replacement capacitor - Google Patents
Method and system for running wheel replacement capacitor Download PDFInfo
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- CN114142484A CN114142484A CN202111447373.XA CN202111447373A CN114142484A CN 114142484 A CN114142484 A CN 114142484A CN 202111447373 A CN202111447373 A CN 202111447373A CN 114142484 A CN114142484 A CN 114142484A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000005065 mining Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 241000306688 Meridion Species 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a method and a system for running a wheel replacement capacitor, which comprises the following steps: acquiring the actual running time of the capacitor; and comparing the actual running time of the capacitor with the long-time running allowable value of the capacitor to obtain a comparison result. According to the invention, the comparison result is positive, AVC can implement a cutting command on the capacitor according to the actual condition of the capacitor, and further automatically switch or alternate the capacitor within the allowable operation time, so that the defect probability of equipment can be reduced by the three capacitor alternate methods, and reliable power supply of a user is ensured; through AVC locking, the capacitor is not cut off or rotated within the allowable operation time, the AVC is presented to a dispatcher in a signal alarm form and a list form, and a rotation decision is given to assist the dispatcher to accurately and quickly realize manual intervention; meanwhile, AVC function blocking signals can be mined and analyzed and processed in cooperation with professional teams and groups, and the purpose of improving the utilization rate of the capacitor is achieved.
Description
Technical Field
The invention belongs to the technical field of alternate capacitor operation, and particularly relates to a method and a system for operating an alternate capacitor.
Background
Based on the regulation and control integrated mode, capacitors with voltage levels of 10kV and above are switched by a regulator in a remote control mode according to the voltage requirements of a bus. An automatic voltage control system (AVC) can automatically control the bus operating voltage within a specified range according to a preset voltage upper and lower limit value, and an AVC strategy controls to cut off a capacitor in consideration of the reactive power redundancy of a load valley grid.
However, in a power grid system, due to various reasons such as signal judgment and setting, equipment transformation and the like, the function of AVC is locked in the aspect of controlling a certain capacitor, so that the capacitor runs for a long time without manual intervention. Because of the condenser passes through the switch and moves in the generating line, long-time operation often can lead to equipment to appear the defect, when it can not be isolated because of the defect and handle, need enlarge the power failure scope, with the generating line power failure cooperation defect processing. Taking a 10kV capacitor bank as an example, the above processing method will cause a power failure of the user because some 10kV feeders cannot be rotated.
Therefore, it is desirable to provide a method and system for rotating capacitor operation to solve the above problems.
Disclosure of Invention
In view of the above problems, the present invention provides a method and a system for alternately operating capacitors, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method of alternately operating capacitors, comprising the steps of:
acquiring the actual running time of the capacitor;
comparing the actual running time of the capacitor with the allowable value of the capacitor for long-time running to obtain a comparison result;
and judging a comparison result, and if the comparison result is positive, automatically switching or rotating the capacitor in the allowed running time according to the voltage and reactive power redundancy condition by the AVC.
Further, the actual operation time of the capacitor is the actual time formed by the difference between the last closing time of the capacitor and the current time.
Further, after comparing the actual operation time of the capacitor with the allowable value of the capacitor for long-time operation to obtain a comparison result, the method further includes:
and judging the comparison result, and if the comparison result is negative or 0, continuing to operate the capacitor until the comparison result is positive.
Further, the AVC automatically switches or rotates the capacitor within the allowed operation time according to the voltage and reactive power redundancy condition, and comprises the following steps:
the first method comprises the following steps: if the comparison result is positive, when the voltage and the power factor are still met after the capacitor is withdrawn, an instruction for cutting off the capacitor is directly sent out by AVC;
and the second method comprises the following steps: if the comparison result is positive, judging that the voltage is low after the capacitor is withdrawn, if the power factor is met, firstly sending a main transformer gear adjusting instruction by AVC, and after the main transformer gear is adjusted, sending a capacitor cutting instruction when the voltage is met after the capacitor is cut;
and the third is that: and if the comparison result is positive, judging that the power factor is not met after the capacitor is withdrawn, and if the voltage meets the requirement, firstly sending a capacitor cutting instruction by AVC and then sending an input instruction to other capacitors on the same section of bus.
Further, the method further comprises:
judging a comparison result, if the comparison result is positive, AVC does not complete capacitor rotation within the allowed operation time according to the voltage and reactive power redundancy condition, AVC is locked, and the capacitor continues to operate;
and the AVC sends signal alarm data and a rotation decision to a signal monitoring interface of the scheduling system.
Further, the sending of the signal alarm and the rotation decision by the AVC to the signal monitoring interface of the scheduling system includes:
adding the actual running time of the capacitor into the signal alarm data, introducing a long-time running allowed value of the capacitor, comparing and judging, wherein the comparison result is positive, the comparison result triggers the running time out-of-limit alarm, and an alarm signal is presented on a signal monitoring interface of the scheduling system;
developing an attribute list aiming at the actual operation time of the capacitor and the allowable value of the long-time operation of the capacitor, synchronously off-limit data in the attribute list in real time, and simultaneously recording the real-time measuring point of the capacitor with the positive comparison result;
and aiming at the capacitor with the automatic rotation failure, mining the last rotation strategy of the capacitor to form an auxiliary decision of manually rotating the capacitor.
The invention also provides a system for operating the battery replacement containers in a rotating mode, which comprises,
the acquisition module is used for acquiring the actual running time of the capacitor;
the comparison module is used for comparing the actual running time of the capacitor with the allowable value of the long-time running of the capacitor to obtain a comparison result;
and the rotation module is used for judging the comparison result, and if the comparison result is positive, the AVC automatically switches or rotates the capacitor within the allowed running time according to the voltage and reactive power redundancy condition.
Further, the system also comprises a waiting module;
and the waiting module judges the comparison result, and if the comparison result is negative or 0, the capacitor continues to operate until the comparison result is positive.
The invention has the technical effects and advantages that:
1. according to the invention, the comparison result is positive, AVC can implement the cutting command on the capacitor according to the actual condition of the capacitor, and further automatically switch or alternate the capacitor within the allowable operation time, and the probability of equipment defects can be reduced by the three capacitor alternating methods, so that reliable power supply of users is ensured.
2. The invention locks through AVC, the capacitor is not cut off or rotated in the allowable operation time, AVC is presented to the dispatcher in the form of signal alarm and list form, and the rotation decision is given to assist the dispatcher to accurately and rapidly realize manual intervention; meanwhile, AVC function blocking signals can be mined and analyzed and processed in cooperation with professional teams and groups, and the purpose of improving the utilization rate of the capacitor is achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 shows a schematic flow diagram of a method for rotating capacitor operation according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The invention provides a method for operating a wheel-replacement capacitor, which comprises the following steps as shown in figure 1:
step one, acquiring the actual running time of the capacitor.
The actual operation of the capacitorThe line time is the actual time formed by the difference between the last closing time of the capacitor and the current time, and the actual running time of the capacitor is T1. Illustratively, the last closing time of the capacitor is 10:00AM (ante. m), the current time is 18:00PM (post meridion. PM), and the actual operating time of the capacitor is 6h (hours). The actual operating time of the capacitor can be derived accurately and simply by way of example, and the example illustrations do not represent the actual operating time of the capacitor.
And step two, comparing the actual running time of the capacitor with the long-time running allowable value of the capacitor to obtain a comparison result.
The allowable value of the capacitor for long-time operation is the maximum time allowed for the capacitor to operate in the existing power grid system, and the allowable value of the capacitor for long-time operation is set to T2. When the actual operation time of the capacitor is compared with the allowable value of the capacitor for long-time operation, namely T1And T2Comparing to obtain a comparison result T0I.e. T0＝T1-T2。
And judging the comparison result, and if the comparison result is negative or 0, continuing to operate the capacitor until the comparison result is positive. Illustratively, the comparison result T is judged0When the actual size of (D) is T0When the current is less than or equal to 0, the capacitor continues to operate, and the actual operation time T of the capacitor is equal to or less than 01Increased, and the capacitor operates for a long time to allow a value T2The comparison result T is not changed at the moment0Starting to increase gradually when the comparison result T is obtained0When the voltage is higher than 0, AVC automatically switches or rotates the capacitor within the allowable operation time according to the voltage and reactive power redundancy condition.
And step three, judging a comparison result, and if the comparison result is positive, automatically switching or rotating the capacitor in the allowed running time according to the voltage and reactive power redundancy condition by the AVC.
The last closing time of the capacitor is counted, and the difference between the last closing time and the current time forms the actual operation time T1And giving the capacitor a long-time operation allowable value T2On the basis of the original AVC strategy, a capacitor is introducedActual running time T1And a long-time operation allowable value T2The capacitor operation alternation criterion is that AVC automatically switches or alternates the capacitor according to the voltage and reactive power redundancy condition, and the capacitor operation alternation criterion mainly comprises the following conditions:
the first method comprises the following steps: if the comparison result is positive, when the voltage and the power factor are still satisfied after the capacitor is withdrawn, the AVC directly sends out a capacitor cutting instruction.
And the second method comprises the following steps: and if the comparison result is positive, judging that the voltage is low after the capacitor is withdrawn, if the power factor is met, firstly sending a main transformer gear adjusting instruction by AVC, and after the main transformer gear is adjusted, sending a capacitor cutting instruction when the voltage is met after the capacitor is cut.
And the third is that: and if the comparison result is positive, judging that the power factor is not met after the capacitor is withdrawn, and if the voltage meets the requirement, firstly sending a capacitor cutting instruction by AVC and then sending an input instruction to other capacitors on the same section of bus.
According to the three conditions, AVC can implement a cutting command on the capacitor according to the actual condition of the capacitor, and then the capacitor is automatically switched or rotated within the allowed running time. Wherein the allowed run time is the maximum time that the capacitor can actually run.
Judging a comparison result, if the comparison result is positive, AVC does not complete capacitor rotation within the allowed operation time according to the voltage and reactive power redundancy condition, AVC is locked, and the capacitor continues to operate; and the AVC sends signal alarm data and a rotation decision to a signal monitoring interface of the scheduling system. When the AVC is locked, the capacitors are not cut off or rotated within the allowable operation time, the AVC is presented to a dispatcher in the form of signal alarm and list, and a rotation decision is given to assist the dispatcher to accurately and quickly realize manual intervention. Meanwhile, AVC function blocking signals can be mined and analyzed and processed in cooperation with professional teams and groups, and the purpose of improving the utilization rate of the capacitor is achieved.
The AVC sends signal alarm data and the rotation decision process is as follows:
adding the actual running time of the capacitor into the signal alarm data, introducing a long-time running allowed value of the capacitor, comparing and judging, wherein the comparison result is positive, triggering running time out-of-limit alarm by the comparison result, and presenting an alarm signal on a signal monitoring interface of the dispatching system. And developing an attribute list aiming at the practical operation time of the capacitor and the allowable value of the long-time operation of the capacitor, synchronously off-limit data in the attribute list in real time, and simultaneously recording the real-time measuring point of the capacitor with the positive comparison result. And aiming at the capacitor with the automatic rotation failure, mining the last rotation strategy of the capacitor to form an auxiliary decision of manually rotating the capacitor.
The AVC sends signal alarm data and a rotation decision to the dispatching system, the alarm signal and the rotation decision are displayed on a signal monitoring interface of a dispatcher, the dispatcher can quickly know the alarm signal on the signal monitoring interface, and then the rotation decision of the capacitor is conveniently carried out manually under the coordination of a rotation strategy.
The invention also provides a system for operating the battery replacement containers in a rotating mode, which comprises,
the acquisition module is used for acquiring the actual running time of the capacitor; the comparison module is used for comparing the actual running time of the capacitor with the allowable value of the long-time running of the capacitor to obtain a comparison result; and the rotation module is used for judging the comparison result, and if the comparison result is positive, the AVC automatically switches or rotates the capacitor within the allowed running time according to the voltage and reactive power redundancy condition.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A method for operating a rotating capacitor is characterized in that: the method comprises the following steps:
acquiring the actual running time of the capacitor;
comparing the actual running time of the capacitor with the allowable value of the capacitor for long-time running to obtain a comparison result;
and judging a comparison result, and if the comparison result is positive, automatically switching or rotating the capacitor in the allowed running time according to the voltage and reactive power redundancy condition by the AVC.
2. A method of rotating capacitor operations as claimed in claim 1, wherein:
the actual running time of the capacitor is the actual time formed by the difference between the last closing time of the capacitor and the current time.
3. A method of rotating capacitor operations as claimed in claim 1, wherein:
after comparing the actual operation time of the capacitor with the allowable value of the capacitor for long-time operation and obtaining a comparison result, the method further comprises the following steps:
and judging the comparison result, and if the comparison result is negative or 0, continuing to operate the capacitor until the comparison result is positive.
4. A method of rotating capacitor operations as claimed in claim 1, wherein:
the AVC automatically switches or rotates capacitors during allowed run times based on voltage and reactive power redundancy, including the following results:
the first method comprises the following steps: if the comparison result is positive, when the voltage and the power factor are still met after the capacitor is withdrawn, an instruction for cutting off the capacitor is directly sent out by AVC;
and the second method comprises the following steps: if the comparison result is positive, judging that the voltage is low after the capacitor is withdrawn, if the power factor is met, firstly sending a main transformer gear adjusting instruction by AVC, and after the main transformer gear is adjusted, sending a capacitor cutting instruction when the voltage is met after the capacitor is cut;
and the third is that: and if the comparison result is positive, judging that the power factor is not met after the capacitor is withdrawn, and if the voltage meets the requirement, firstly sending a capacitor cutting instruction by AVC and then sending an input instruction to other capacitors on the same section of bus.
5. A method of rotating capacitor operations as claimed in claim 1, wherein:
the method further comprises the following steps:
judging a comparison result, if the comparison result is positive, AVC does not complete capacitor rotation within the allowed operation time according to the voltage and reactive power redundancy condition, AVC is locked, and the capacitor continues to operate;
and the AVC sends signal alarm data and a rotation decision to a signal monitoring interface of the scheduling system.
6. A method of rotating capacitor operations as claimed in claim 5, wherein:
the AVC sending signal alarms and rotation decisions to a signal monitoring interface of a scheduling system comprises:
adding the actual running time of the capacitor into the signal alarm data, introducing a long-time running allowed value of the capacitor, comparing and judging, wherein the comparison result is positive, the comparison result triggers the running time out-of-limit alarm, and an alarm signal is presented on a signal monitoring interface of the scheduling system;
developing an attribute list aiming at the actual operation time of the capacitor and the allowable value of the long-time operation of the capacitor, synchronously off-limit data in the attribute list in real time, and simultaneously recording the real-time measuring point of the capacitor with the positive comparison result;
and aiming at the capacitor with the automatic rotation failure, mining the last rotation strategy of the capacitor to form an auxiliary decision of manually rotating the capacitor.
7. A system for alternately changing capacitor operation, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the acquisition module is used for acquiring the actual running time of the capacitor;
the comparison module is used for comparing the actual running time of the capacitor with the allowable value of the long-time running of the capacitor to obtain a comparison result;
and the rotation module is used for judging the comparison result, and if the comparison result is positive, the AVC automatically switches or rotates the capacitor within the allowed running time according to the voltage and reactive power redundancy condition.
8. A system of rotating capacitor operations as claimed in claim 7, wherein:
the system also includes a wait module;
and the waiting module judges the comparison result, and if the comparison result is negative or 0, the capacitor continues to operate until the comparison result is positive.
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| CN202111447373.XA CN114142484B (en) | 2021-11-30 | 2021-11-30 | Method and system for running alternate capacitor |
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| CN202111447373.XA CN114142484B (en) | 2021-11-30 | 2021-11-30 | Method and system for running alternate capacitor |
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| CN114142484B CN114142484B (en) | 2024-04-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110169461A1 (en) * | 2010-01-14 | 2011-07-14 | Deaver Sr Brian J | System, Device and Method for Regulating Volt-Ampere Reactance in a Power Distribution System |
| CN102148505A (en) * | 2011-04-25 | 2011-08-10 | 北京都市鼎点科技有限公司 | Reactive compensation controller |
| CN203690938U (en) * | 2014-02-19 | 2014-07-02 | 平高集团智能电气有限公司 | Low-voltage reactive-power automatic compensation device |
| CN110571819A (en) * | 2019-09-12 | 2019-12-13 | 宁波市电力设计院有限公司 | novel distribution network voltage regulator device |
| CN111478337A (en) * | 2020-04-17 | 2020-07-31 | 许继集团有限公司 | Control method for capacitor switching |
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2021
- 2021-11-30 CN CN202111447373.XA patent/CN114142484B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110169461A1 (en) * | 2010-01-14 | 2011-07-14 | Deaver Sr Brian J | System, Device and Method for Regulating Volt-Ampere Reactance in a Power Distribution System |
| CN102148505A (en) * | 2011-04-25 | 2011-08-10 | 北京都市鼎点科技有限公司 | Reactive compensation controller |
| CN203690938U (en) * | 2014-02-19 | 2014-07-02 | 平高集团智能电气有限公司 | Low-voltage reactive-power automatic compensation device |
| CN110571819A (en) * | 2019-09-12 | 2019-12-13 | 宁波市电力设计院有限公司 | novel distribution network voltage regulator device |
| CN111478337A (en) * | 2020-04-17 | 2020-07-31 | 许继集团有限公司 | Control method for capacitor switching |
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