CN110829439A - Intelligent transformer gear shifting method based on voltage out-of-limit starting optimal algorithm - Google Patents
Intelligent transformer gear shifting method based on voltage out-of-limit starting optimal algorithm Download PDFInfo
- Publication number
- CN110829439A CN110829439A CN201911128383.XA CN201911128383A CN110829439A CN 110829439 A CN110829439 A CN 110829439A CN 201911128383 A CN201911128383 A CN 201911128383A CN 110829439 A CN110829439 A CN 110829439A
- Authority
- CN
- China
- Prior art keywords
- voltage
- gear shifting
- bus
- limit
- instruction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 230000000737 periodic effect Effects 0.000 claims description 2
- 238000005457 optimization Methods 0.000 claims 4
- 239000013307 optical fiber Substances 0.000 abstract description 7
- 238000004891 communication Methods 0.000 abstract description 6
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a transformer intelligent gear shifting method based on a voltage out-of-limit starting optimal algorithm, which is characterized in that on the basis of an original main transformer measurement and control device, automatic gear shifting is realized after the voltage of a bus is out of limit by setting the out-of-limit range of the bus voltage and setting the condition of triggering and outputting a gear shifting instruction, if the voltage of the 10kV bus is lower than 10kV or higher than 10.7kV, the gear shifting instruction is output in a delayed broadening mode for 10 seconds, and when the voltage of the 10kV bus reaches 10-10.7 kV, the gear shifting instruction is stopped being output; the problems that in the prior art, manual gear shifting is large in workload, voltage regulation is not timely or accuracy is not high, so that the normal power utilization is affected or electric equipment is damaged due to the fact that the voltage of a user side is unqualified, misoperation accidents caused by frequent operation of scheduling operating personnel in the gear shifting process are caused, the dependence on communication optical fibers is large and the like are solved.
Description
Technical Field
The invention belongs to the technical field of relay protection automation of an electric power system, and particularly relates to an intelligent transformer gear shifting method based on a voltage out-of-limit starting optimal algorithm.
Background
With the continuous development of power grids, especially the continuous increase of the number of main transformers of 110kV and below, the working pressure of dispatching operators is also continuously increased, and the qualification rate of the 10kV bus voltage directly affects the quality of the user voltage, therefore, the operators need to shift the transformer to ensure that the 10kV bus voltage is in the qualification range, in the daily operation and maintenance process, the prior art is to transmit the voltage collected by the main transformer measurement and control device to the main station end background via the communication optical fiber uplink channel, the background judges that the voltage is out of limit to give an alarm, prompt the dispatcher to perform the up-shift or down-shift operation on the specific main transformer, after receiving the alarm, the dispatcher manually inputs the shift instruction, the shift instruction is transmitted to the measurement and control device via the communication optical fiber downlink channel, and then to the main transformer shift device, and then performs the shift operation on the transformer, if the voltage regulation is not in time or the accuracy is not high, the manual monitoring and gear shifting mode has large workload, in addition, the voltage monitoring and remote control gear shifting completely depend on communication optical fibers, and the operation cannot be carried out if the communication optical fibers are interrupted.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the intelligent transformer gear shifting method based on the voltage out-of-limit starting optimal algorithm is provided, and the problems that the gear shifting method in the prior art is large in workload, prone to causing untimely voltage regulation or low accuracy, so that voltage on a user side is unqualified, normal power utilization is affected or electric equipment is damaged, misoperation accidents caused by frequent operation of scheduling operating personnel in the gear shifting process are caused, dependence on communication optical fibers is large and the like are solved.
The technical scheme of the invention is as follows: an intelligent transformer gear shifting method based on a voltage out-of-limit starting optimal algorithm comprises the following steps:
s1, the main transformer measurement and control device monitors the 10KV bus voltage in real time and judges whether the 10KV bus voltage is out of limit;
s2, if the voltage exceeds the limit, the main transformer measurement and control device outputs a gear shifting instruction according to the out-of-limit range of the 10KV bus voltage;
and S3, executing the gear shifting command by the gear shifting device of the transformer.
The condition for judging whether the 10KV bus voltage is out of limit in step S1 is: and if the voltage of the 10KV bus is lower than 10kV or higher than 10.7KV, the low voltage of the 10KV bus is not less than a set value A, the negative sequence voltage is not more than a set value B, and the voltage of the 10KV bus is not in a PT disconnection state, the out-of-limit is judged.
After the limit is determined to be out of limit, the conditions for outputting the gear shifting command are as follows: if the voltage of the 10KV bus is lower than 10KV, a 'gear-up' instruction is output after time delay widening for 10 seconds, if the voltage of the 10KV bus is higher than 10.7KV, a 'gear-down' instruction is output after time delay widening for 10 seconds, and when the voltage of the 10KV bus reaches 10-10.7 kV, the gear-shifting instruction is stopped being output.
The gear shifting method further comprises the following steps: after the voltage is out of limit to start an output instruction, the 10KV bus voltage reaches the optimal range of 10.2-10.5 kV through a table look-up method and a trial adjustment method, periodic search is carried out, if the 10KV bus voltage is within the range of 10-10.2 kV, trial adjustment for 'upshifting' is carried out, if the 10KV bus voltage is within the range of 10.7-10.5 kV, trial adjustment for 'downshifting' is carried out until the 10KV bus voltage reaches the optimal range.
The invention has the beneficial effects that: according to the intelligent gear shifting method, the intelligent gear shifting function of the transformer based on the voltage out-of-limit starting optimal algorithm is implanted on the basis of the original main transformer measurement and control device, the bus voltage is automatically shifted after being out of limit by setting the out-of-limit range of the bus voltage and setting the condition for triggering the output of the gear shifting instruction, the bus voltage is ensured to be in the qualified range, the method is simple, low in cost and easy to realize, the gear shifting is more intelligent, in addition, the method disclosed by the invention prevents frequent gear shifting from occurring by setting the delay broadening within 10 seconds, avoids interference, can pull the voltage to a reasonable level, ensures that the voltage can be in the qualified range for a long time, and can avoid mechanical abrasion caused by multiple gear shifting; compared with manual gear shifting, the method has the advantages that bus voltage monitoring, gear shifting logic judgment and instruction output are all completed in the main transformer measurement and control device, optical fiber transmission and relevant protocol conversion are not needed, gear shifting implementation means are quicker, more accurate and more intelligent, workload of manual operation of dispatching operation personnel on bus voltage monitoring and transformer gear shifting is greatly reduced, risks caused by personnel negligence are effectively avoided, and safety and reliability are improved.
Drawings
FIG. 1 is a schematic diagram of a prior art transformer gear shifting process;
FIG. 2 is a schematic diagram of a transformer shift process according to the present invention;
FIG. 3 is a diagram of voltage threshold crossing enable logic;
FIG. 4 is a flow chart of voltage debugging and lookup.
Detailed Description
As shown in fig. 2 and fig. 3, the embodiment of the invention discloses an intelligent transformer gear shifting method based on a voltage out-of-limit starting optimal algorithm, which comprises the following steps:
s1, the main transformer measurement and control device monitors the 10KV bus voltage in real time and judges whether the 10KV bus voltage is out of limit, if the 10KV bus voltage is lower than 10kV or higher than 10.7KV, the low voltage of the 10KV bus is not less than a set value of 70V, the negative sequence voltage is not more than a set value of 6V, and the 10KV bus voltage is not in a PT disconnection state, the out of limit is judged;
s2, outputting a corresponding gear shifting instruction by the main transformer measurement and control device according to the out-of-limit range of 10KV bus voltage, if the 10KV bus voltage is lower than 10KV, outputting a gear shifting instruction after time delay and widening for 10 seconds, if the 10KV bus voltage is higher than 10.7KV, outputting a gear shifting instruction after time delay and widening for 10 seconds, and when the 10KV bus voltage is within the range of 10-10.7 KV, stopping outputting the gear shifting instruction;
and S3, executing the gear shifting command by the gear shifting device of the transformer.
As shown in fig. 4, after the voltage threshold-crossing start-up output command, the 10KV bus voltage reaches the optimal range of 10.2-10.5 KV by the table look-up method and the trial adjustment method, the search is performed in a detection period of 10 seconds, if the 10KV bus voltage is in the range of 10-10.2 KV, a shift-up command is output, and the transformer shift-adjusting device receives the command to complete the shift-up action; if the 10KV bus voltage is within the range of 10.5-10.7 kV, outputting a downshift instruction, and receiving the instruction by the transformer gear shifting device to complete an upshift action; until the 10KV bus voltage reaches the optimal range; the purpose of enabling the 10KV bus voltage to reach the optimal range by adopting a table look-up method and a trial adjustment method is to prevent the 10KV bus voltage after gear shifting from being in an out-of-limit boundary value and being easy to fluctuate, so that frequent gear shifting is caused, and the service life of the gear shifting device is influenced. The priority of table lookup and debugging is lower than the voltage threshold-crossing starting output, and the table lookup and debugging are only performed after the voltage threshold-crossing starting output instruction.
Claims (5)
1. An intelligent transformer gear shifting method based on a voltage out-of-limit starting optimal algorithm is characterized by comprising the following steps of: the gear shifting method comprises the following steps:
s1, the main transformer measurement and control device monitors the 10KV bus voltage in real time and judges whether the 10KV bus voltage is out of limit;
s2, if the voltage exceeds the limit, the main transformer measurement and control device outputs a gear shifting instruction according to the out-of-limit range of the 10KV bus voltage;
and S3, executing the gear shifting command by the gear shifting device of the transformer.
2. The intelligent transformer gear shifting method based on the voltage out-of-limit starting optimization algorithm according to claim 1, characterized in that: the condition for judging whether the 10KV bus voltage is out of limit in step S1 is: and if the voltage of the 10KV bus is lower than 10kV or higher than 10.7KV, the low voltage of the 10KV bus is not less than a set value A, the negative sequence voltage is not more than a set value B, and the voltage of the 10KV bus is not in a PT disconnection state, the out-of-limit condition is determined.
3. The intelligent transformer gear shifting method based on the voltage out-of-limit starting optimization algorithm as claimed in claim 1 or 2, wherein: the set value A is 70V, and the set value B is 6V.
4. The intelligent transformer gear shifting method based on the voltage out-of-limit starting optimization algorithm according to claim 2, characterized in that: after the limit is determined to be out of limit, the conditions for outputting the gear shifting command are as follows: if the voltage of the 10KV bus is lower than 10.KV, a 'gear-up' instruction is output after delay broadening for 10 seconds, if the voltage of the 10KV bus is higher than 10.7KV, a 'gear-down' instruction is output after delay broadening for 10 seconds, and when the voltage of the 10KV bus is within the range of 10-10.7 kV, the gear-shifting instruction is stopped being output.
5. The intelligent transformer gear shifting method based on the voltage out-of-limit starting optimization algorithm according to claim 1, characterized in that: the gear shifting method further comprises the following steps: after the voltage is out of limit to start an output instruction, the 10KV bus voltage reaches the optimal range of 10.2-10.5 kV through a table look-up method and a trial adjustment method, periodic search is carried out, if the 10KV bus voltage is within the range of 10-10.2 kV, trial adjustment for 'upshifting' is carried out, if the 10KV bus voltage is within the range of 10.7-10.5 kV, trial adjustment for 'downshifting' is carried out until the 10KV bus voltage reaches the optimal range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911128383.XA CN110829439A (en) | 2019-11-18 | 2019-11-18 | Intelligent transformer gear shifting method based on voltage out-of-limit starting optimal algorithm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911128383.XA CN110829439A (en) | 2019-11-18 | 2019-11-18 | Intelligent transformer gear shifting method based on voltage out-of-limit starting optimal algorithm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110829439A true CN110829439A (en) | 2020-02-21 |
Family
ID=69556401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911128383.XA Pending CN110829439A (en) | 2019-11-18 | 2019-11-18 | Intelligent transformer gear shifting method based on voltage out-of-limit starting optimal algorithm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110829439A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115221472A (en) * | 2022-07-21 | 2022-10-21 | 国网江苏省电力有限公司电力科学研究院 | Self-adaptive setting method and device for user voltage limit value, memory and computing equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609744A (en) * | 2004-11-04 | 2005-04-27 | 哈尔滨工业大学 | Power supply network voltage reactive-load remote control real-time optimization control method |
| CN101860041A (en) * | 2010-05-04 | 2010-10-13 | 合肥阳光电源有限公司 | Method for dynamically adjusting busbar voltage to improve grid connection efficiency |
| CN203377600U (en) * | 2013-01-18 | 2014-01-01 | 夏家峰 | Maintenance-free on-load voltage-adjusting type high-voltage reactive automatic compensation apparatus |
| CN105226665A (en) * | 2015-10-21 | 2016-01-06 | 国家电网公司 | The method of busbar voltage daily fluctuation rate is reduced by automatic plant stand cooperation control |
| CN106130027A (en) * | 2016-06-30 | 2016-11-16 | 广州市奔流电力科技有限公司 | The low-voltage distribution transformer platform district two-dimension integrated administering method of voltage |
| CN108321848A (en) * | 2018-03-30 | 2018-07-24 | 国网四川省电力公司内江供电公司 | A kind of distributed electrical operated control method being adapted with OLTC voltage regulating modes |
| CN109713710A (en) * | 2017-10-26 | 2019-05-03 | 阳光电源股份有限公司 | A kind of communication host and photovoltaic generating system |
-
2019
- 2019-11-18 CN CN201911128383.XA patent/CN110829439A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609744A (en) * | 2004-11-04 | 2005-04-27 | 哈尔滨工业大学 | Power supply network voltage reactive-load remote control real-time optimization control method |
| CN101860041A (en) * | 2010-05-04 | 2010-10-13 | 合肥阳光电源有限公司 | Method for dynamically adjusting busbar voltage to improve grid connection efficiency |
| CN203377600U (en) * | 2013-01-18 | 2014-01-01 | 夏家峰 | Maintenance-free on-load voltage-adjusting type high-voltage reactive automatic compensation apparatus |
| CN105226665A (en) * | 2015-10-21 | 2016-01-06 | 国家电网公司 | The method of busbar voltage daily fluctuation rate is reduced by automatic plant stand cooperation control |
| CN106130027A (en) * | 2016-06-30 | 2016-11-16 | 广州市奔流电力科技有限公司 | The low-voltage distribution transformer platform district two-dimension integrated administering method of voltage |
| CN109713710A (en) * | 2017-10-26 | 2019-05-03 | 阳光电源股份有限公司 | A kind of communication host and photovoltaic generating system |
| CN108321848A (en) * | 2018-03-30 | 2018-07-24 | 国网四川省电力公司内江供电公司 | A kind of distributed electrical operated control method being adapted with OLTC voltage regulating modes |
Non-Patent Citations (2)
| Title |
|---|
| 甘齐顺等: "《电力系统自动装置》", 31 August 2008, pages: 132 * |
| 范天吉主编: "《煤矿监测监控综合技术手册 第1卷》", 吉林电子出版社 , pages: 54 - 55 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115221472A (en) * | 2022-07-21 | 2022-10-21 | 国网江苏省电力有限公司电力科学研究院 | Self-adaptive setting method and device for user voltage limit value, memory and computing equipment |
| CN115221472B (en) * | 2022-07-21 | 2024-01-30 | 国网江苏省电力有限公司电力科学研究院 | Self-adaptive setting method and device for user voltage limit value, memory and computing equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100776352B1 (en) | automatic operation system and automatic operation method of ???? connected ????? | |
| CN103647269B (en) | A kind of extra-high voltage DC transmission system series connection bivalve group balance movement control method | |
| CN208580186U (en) | A kind of test macro and generating set of primary frequency modulation performance | |
| CN102324741A (en) | Micro-power grid off-grid energy balance and control device and method | |
| CN110784017A (en) | Intelligent detection device and method for distribution transformer based on real-time data acquisition | |
| CN110829439A (en) | Intelligent transformer gear shifting method based on voltage out-of-limit starting optimal algorithm | |
| CN104283222A (en) | Regional power grid reactive voltage control system | |
| CN105098790A (en) | Regional power grid reactive voltage operation evaluation and early warning research system | |
| CN111628505A (en) | Transformer on-load automatic voltage regulation device and method based on electricity consumption information acquisition system | |
| CN103532221A (en) | Spare-power automatic switching implementation method of lines under wiring and operating modes of self-adaptive 330kV substation | |
| CN107944570B (en) | Automatic processing method and device for intelligent substation sequential control atypical state | |
| CN102664455A (en) | Remote control method for remotely-controlled reclosing switching | |
| CN111049148B (en) | Automatic adjustment control method for transformer tap | |
| CN109462217B (en) | Power distribution terminal protection constant value self-adaptive switching method and device | |
| CN206947953U (en) | 1000 kilovolts of main transformer regulating compensations become on-load voltage regulation and haul oneself willingly into cutting system | |
| CN211744023U (en) | Self-healing system for avoiding station power failure risk by utilizing mutual feeder rule | |
| CN115036928A (en) | Control method and system of active power distribution network voltage regulation controller | |
| CN214204954U (en) | Circuit voltage regulator device | |
| CN111817308B (en) | AVC-based reactive power regulation effectiveness judgment method and system | |
| CN104184412A (en) | Photovoltaic power station low-voltage ride-through movement detection automatic control system | |
| CN217692685U (en) | Control system for preventing AGC instruction misoperation | |
| CN212114795U (en) | Transformer on-load automatic voltage regulation device based on power consumption information acquisition system | |
| CN107196308B (en) | 1000 KV main transformer voltage regulation compensation variable on-load voltage regulation self-switching system and voltage regulation method thereof | |
| CN110707709B (en) | Method for adjusting AVC (automatic Voltage control) linkage of variable voltage and main station for 500kV power station | |
| CN217282369U (en) | System for automatically controlling on-load voltage regulation of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200221 |