CN114142484B - Method and system for running alternate capacitor - Google Patents
Method and system for running alternate capacitor Download PDFInfo
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- CN114142484B CN114142484B CN202111447373.XA CN202111447373A CN114142484B CN 114142484 B CN114142484 B CN 114142484B CN 202111447373 A CN202111447373 A CN 202111447373A CN 114142484 B CN114142484 B CN 114142484B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 167
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000007547 defect Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 241001522296 Erithacus rubecula Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a method and a system for operating a rotating 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 allowable value of the capacitor running for a long time to obtain a comparison result. According to the invention, the comparison result is positive, and AVC can implement a cutting command on the capacitor according to the actual condition of the capacitor, so that the capacitor can be automatically switched or rotated in the allowable running time, and the defect probability of the equipment can be reduced by the three capacitor rotation methods, and the reliable power supply of a user is ensured; through AVC blocking, the capacitor is not cut off or rotated in the allowed running time, the AVC is presented to the dispatcher in the form of signal alarm and list, and rotation decision is given to assist the dispatcher to accurately and quickly realize manual intervention; meanwhile, the AVC function blocking signal can be mined and analyzed, and the processing is performed in cooperation with a professional team, so that the purpose of improving the utilization rate of the capacitor is achieved.
Description
Technical Field
The invention belongs to the technical field of operation of a rotating capacitor, and particularly relates to a method and a system for operating the rotating capacitor.
Background
Based on the regulation and control integrated mode, the capacitors with voltage classes of 10kV and above are remotely controlled by a regulator according to the bus voltage requirement. An automatic voltage control system (automatic voltage controller, AVC) can automatically control the bus operating voltage within a specified range according to preset upper and lower voltage limits, and the AVC strategy will control the cut-off capacitor taking into account the load valley grid reactive power redundancy.
However, due to various reasons such as signal judgment setting and equipment transformation of a power grid system, AVC often causes functional locking in the aspect of control of a certain capacitor, so that the capacitor can be operated for a long time without manual intervention. Because the capacitor runs on the bus through the switch, the long-time running often causes defects of equipment, and when the equipment cannot be isolated due to the defects, the power failure range needs to be enlarged, and the bus power failure is matched with the defect treatment. Taking a 10kV capacitor bank as an example, the processing mode can cause power failure of a user due to the fact that part of 10kV feeder lines cannot be rotated.
Therefore, it is necessary to invent a method and system for rotating capacitor operation to solve the above problems.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for operating a capacitor to solve the above-mentioned problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method of alternating capacitor operation, 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 running for a long time to obtain a comparison result;
and judging the comparison result, if the comparison result is positive, automatically switching or rotating the capacitor by the AVC in the allowable running time according to the voltage and reactive power redundancy condition.
Further, 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.
Further, the comparing the actual operation time of the capacitor with the allowable value of the capacitor for long time operation, after obtaining the comparison result, further includes:
and judging the comparison result, 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 toggles capacitors within a permissible run time according to voltage and reactive power redundancy conditions, including:
first kind: if the comparison result is positive, and the voltage and the power factor of the capacitor still meet the requirements after the capacitor exits, the AVC directly sends out a capacitor cutting instruction;
second kind: the comparison result is positive, the voltage after the capacitor is withdrawn is judged to be lower, when the power factor is met, an AVC (automatic voltage control) sends out a command for adjusting the main gear, and after the main gear is adjusted, when the voltage after the capacitor is judged to be removed is met, a command for removing the capacitor is sent out;
third kind: and if the comparison result is positive, judging that the power factor of the capacitor is not met after the capacitor is withdrawn, and if the voltage meets the requirement, sending a capacitor cutting instruction by AVC, and then inputting other capacitors with the instruction on the same bus.
Further, the method further comprises:
judging a comparison result, if the comparison result is positive, the AVC does not complete capacitor rotation within the allowable running time according to the voltage and reactive power redundancy condition, and the AVC is blocked and the capacitor continues to run;
AVC sends signal alert data and rotation decisions to the signal monitoring interface of the dispatch system.
Further, the AVC sending signal alarms and rotation decisions to a signal monitoring interface of a scheduling system includes:
adding the actual running time of the capacitor into the signal alarm data, introducing a long-time running allowable value of the capacitor, comparing and judging, and if the comparison result is positive, triggering out-of-limit running time alarm by the comparison result, and presenting an alarm signal on a signal monitoring interface of the dispatching system;
developing an attribute list aiming at the actual running time of the capacitor and the allowable value of the capacitor running for a long time, synchronizing out-of-limit data in real time in the attribute list, and recording real-time measuring points of the capacitor with positive comparison results;
aiming at the capacitor with automatic rotation failure, the last rotation strategy is mined to form an auxiliary decision of manually rotating the capacitor.
The invention also provides a system for alternating capacitor operation, comprising,
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 capacitor running for a long time 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 in the allowable running time according to the voltage and reactive power redundancy condition.
Further, the system also comprises a waiting module;
and the waiting module is used for judging 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, and AVC can implement the cutting command on the capacitor according to the actual condition of the capacitor, so that the capacitor can be automatically switched or rotated in the allowable running time, and the defect probability of the device can be reduced by the three capacitor rotation methods, and the reliable power supply of a user is ensured.
2. According to the invention, through AVC blocking, the capacitor is not cut off or rotated in the allowable running 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 rapidly realize manual intervention; meanwhile, the AVC function blocking signal can be mined and analyzed, and the processing is performed in cooperation with a professional team, so that 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 may 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 of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic flow diagram of a method of rotating capacitor operation according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a method for operating a rotating capacitor, which is shown in fig. 1 and comprises the following steps:
step one, acquiring the actual running time of a capacitor.
The actual running time of the capacitor is the actual time formed by the difference between the last closing time and the current time of the capacitor, and the actual running time of the capacitor is T 1 . For example, the last closing time of the capacitor is 10:00AM (anti media: am), the current time is 18:00PM (post media: pm), and the actual running time of the capacitor is 6h (hours). The actual capacitor run time can be accurately and simply derived by way of example, and the example illustrations do not represent actual capacitor run times.
And step two, comparing the actual running time of the capacitor with the allowable value of the capacitor running for a long time to obtain a comparison result.
The allowable value of the capacitor running for a long time is the longest time for which the capacitor is allowed to run in the existing power grid system, and the allowable value of the capacitor running for a long time is set as T 2 . The actual running time of the capacitor is longer than that of the capacitorWhen the time operation allowable values are compared, namely T 1 And T 2 Comparing to obtain a comparison result T 0 T, i.e 0 ＝T 1 -T 2 。
And judging the comparison result, if the comparison result is negative or 0, continuing to operate the capacitor until the comparison result is positive. Exemplary, the comparison result T is determined 0 When T is the actual size of 0 When the temperature is less than or equal to 0, the capacitor continues to operate, and the actual operation time T of the capacitor is at the moment 1 Increase, and capacitor operates for a long time to allow the value T 2 Unchanged, at this time, the comparison result T 0 Starting to gradually increase when the comparison result T 0 At > 0, AVC automatically switches or toggles capacitors during allowed run time depending on voltage and reactive power redundancy conditions.
And thirdly, judging a comparison result, and if the comparison result is positive, automatically switching or rotating the capacitor by the AVC in the allowable running time according to the voltage and reactive power redundancy condition.
Counting the last closing time of the capacitor, and forming an actual running time T with the current time difference 1 And give the allowable value T of the capacitor running for a long time 2 Based on the original AVC strategy, introducing the actual running time T of the capacitor 1 And a long-time operation allowable value T 2 As a capacitor operation rotation criterion, the capacitor is automatically switched or rotated by AVC according to the voltage and reactive power redundancy conditions, and the capacitor operation rotation criterion mainly comprises the following conditions:
first kind: and if the comparison result is positive, and the voltage and the power factor of the capacitor still meet after the capacitor is withdrawn, directly sending a capacitor removing instruction by the AVC.
Second kind: and if the comparison result is positive, judging that the voltage of the capacitor is lower after the capacitor is withdrawn, and if the power factor is met, sending a command for adjusting the main gear by the AVC, and if the voltage of the capacitor after the capacitor is judged to be removed is met after the main gear is adjusted, sending a command for removing the capacitor.
Third kind: and if the comparison result is positive, judging that the power factor of the capacitor is not met after the capacitor is withdrawn, and if the voltage meets the requirement, sending a capacitor cutting instruction by AVC, and then inputting other capacitors with the instruction on the same bus.
The three conditions indicate that AVC can implement cutting commands on the capacitor according to the actual conditions of the capacitor, and then the capacitor is automatically switched or rotated in the allowable running time, and the three capacitor rotation methods can reduce the defect probability of equipment and ensure reliable power supply of users. Wherein the allowed run time is the maximum time the capacitor can actually run.
Judging a comparison result, if the comparison result is positive, the AVC does not complete capacitor rotation within the allowable running time according to the voltage and reactive power redundancy condition, and the AVC is blocked and the capacitor continues to run; AVC sends signal alert data and rotation decisions to the signal monitoring interface of the dispatch system. When AVC is locked, the capacitor does not complete cutting or rotation within the allowed running time, the AVC is presented to the dispatcher in the form of signal alarm and list, and rotation decision is given to assist the dispatcher to accurately and quickly realize manual intervention. Meanwhile, the AVC function blocking signal can be mined and analyzed, and the processing is performed in cooperation with a professional team, so that the purpose of improving the utilization rate of the capacitor is achieved.
The AVC sends signal alarm data and the round robin decision process is as follows:
and adding the actual running time of the capacitor into the signal alarm data, introducing a long-time running allowable value of the capacitor, comparing and judging, and triggering the running time out-of-limit alarm by the comparison result if the comparison result is positive, and presenting an alarm signal on a signal monitoring interface of the dispatching system. And developing an attribute list aiming at the actual running time of the capacitor and the allowable value of the capacitor running for a long time, synchronizing out-of-limit data in the attribute list in real time, and recording real-time measuring points of the capacitor with positive comparison results. Aiming at the capacitor with automatic rotation failure, the last rotation strategy is mined to form an auxiliary decision of manually rotating the capacitor.
AVC sends signal alarm data and rotation decision to the dispatching system, at the moment, the alarm signal and 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 under the cooperation of rotation strategy, the rotation decision of the capacitor can be conveniently carried out manually.
The invention also provides a system for alternating capacitor operation, comprising,
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 capacitor running for a long time 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 in the allowable running time according to the voltage and reactive power redundancy condition.
Although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A method of rotating capacitor operation, characterized by: 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 running for a long time to obtain a comparison result;
judging a comparison result, if the comparison result is positive, automatically switching or rotating a capacitor by the AVC in the allowable running time according to the voltage and reactive power redundancy condition;
the AVC automatically switches or rotates capacitors within the allowed run time according to the voltage and reactive power redundancy conditions, including the following results:
first kind: if the comparison result is positive, and the voltage and the power factor of the capacitor still meet the requirements after the capacitor exits, the AVC directly sends out a capacitor cutting instruction;
second kind: the comparison result is positive, the voltage after the capacitor is withdrawn is judged to be lower, when the power factor is met, an AVC (automatic voltage control) sends out a command for adjusting the main gear, and after the main gear is adjusted, when the voltage after the capacitor is judged to be removed is met, a command for removing the capacitor is sent out;
third kind: if the comparison result is positive, judging that the power factor of the capacitor 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 inputting other capacitors with the instruction on the same bus;
the method further comprises the steps of:
judging a comparison result, if the comparison result is positive, the AVC does not complete capacitor rotation within the allowable running time according to the voltage and reactive power redundancy condition, and the AVC is blocked and the capacitor continues to run;
AVC sends signal alert data and rotation decisions to the signal monitoring interface of the dispatch system.
2. A method of rotating capacitor operation according to claim 1, characterized in that:
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 operation according to claim 1, characterized in that:
the method comprises the steps of comparing the actual running time of the capacitor with the allowable value of the capacitor running for a long time, and after the comparison result is obtained, further comprising:
and judging the comparison result, 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 operation according to claim 1, characterized in that:
the AVC sends signal alarms and rotation decisions to a signal monitoring interface of a scheduling system, which comprises the following steps:
adding the actual running time of the capacitor into the signal alarm data, introducing a long-time running allowable value of the capacitor, comparing and judging, and if the comparison result is positive, triggering out-of-limit running time alarm by the comparison result, and presenting an alarm signal on a signal monitoring interface of the dispatching system;
developing an attribute list aiming at the actual running time of the capacitor and the allowable value of the capacitor running for a long time, synchronizing out-of-limit data in real time in the attribute list, and recording real-time measuring points of the capacitor with positive comparison results;
aiming at the capacitor with automatic rotation failure, the last rotation strategy is mined to form an auxiliary decision of manually rotating the capacitor.
5. A system for switched capacitor operation, which system when operated performs a method for switched capacitor operation according to any one of claims 1-4, characterized in that: comprising the steps of (a) a step of,
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 capacitor running for a long time 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 in the allowable running time according to the voltage and reactive power redundancy condition.
6. The system for rotating capacitor operation of claim 5, wherein:
the system also includes a waiting module;
and the waiting module is used for judging 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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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8508070B2 (en) * | 2010-01-14 | 2013-08-13 | S&C Electric Company | System, device and method for regulating volt-ampere reactance in a power distribution system |
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- 2021-11-30 CN CN202111447373.XA patent/CN114142484B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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