CN202837946U - Control system used for a plurality of coolers in main transformer - Google Patents
Control system used for a plurality of coolers in main transformer Download PDFInfo
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- CN202837946U CN202837946U CN201220447894.5U CN201220447894U CN202837946U CN 202837946 U CN202837946 U CN 202837946U CN 201220447894 U CN201220447894 U CN 201220447894U CN 202837946 U CN202837946 U CN 202837946U
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Abstract
The utility model relates to a control system used for a plurality of coolers in a main transformer. The control system is connected to the a plurality of coolers, and the control system is characterized in that the control system comprises a programmable logic controller PLC, and the PLC is connected to and used for controlling the oil pump motor and the fan motor of the coolers. A plurality of coolers of the main transformer is controlled by the PLC, and the control system used for a plurality of coolers in a main transformer is characterized in that the protection functions are complete, the work reliability is high, the operation of a cooling system is stable, maintenance workload is small, operation by workers is simple, concentrated operation on site is achieved, etc.
Description
Technical field
The utility model relates to the power technology field, particularly a kind of main-transformer air cooling system based on PLC.
Background technology
Power transformer is the throat that power plant, power station electric power are carried, and its safe and reliable operation is directly connected to the Social benefit and economic benefit in power plant, power station, even more.And the safety of main-transformer whether the crucial reliably working that is refrigeratory is whether.Therefore, refrigeratory control system reliability of operation is required also just to seem very strict.
Great majority are the on-off control systems that are made of by electric connection discrete elements such as air switch, contactor, relay, the time relays in refrigeratory control system in the past.This system element is many, bulky, wiring is loaded down with trivial details, the trouble spot is many, failure rate is high, reliability is low, the maintenance maintenance rate high, although play certain control action, can not satisfy the growing needs of China's electric utility.And refrigeratory control system in the past requires many group refrigeratorys to carry out intelligent decision under the various working condition to transformer, and it is unable to do what one wishes that the situation of alternately devoting oneself to work just seems.Especially can not be fit to field requirement when completed switch board, and need to carry out function modifications the time, switch board need to increase and decrease device, layout again, distribution again, and also the time is long.
The utility model content
For solving the problems of the technologies described above, the utility model discloses a kind of control system for a plurality of refrigeratorys of main-transformer, described control system is connected to described a plurality of refrigeratory, it is characterized in that: described control system comprises programmable logic controller (PLC) PLC, and PLC connects and control Oil pump electrical machinery and the fan electromotor of described refrigeratory.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiment in the utility model.
Embodiment
A kind of control system for a plurality of refrigeratorys of main-transformer is disclosed among the embodiment of the present utility model, described control system is connected to described a plurality of refrigeratory, it is characterized in that: described control system comprises programmable logic controller (PLC) PLC, and PLC connects and control Oil pump electrical machinery and the fan electromotor of described refrigeratory.In other words, key of the present utility model just is to realize control to Oil pump electrical machinery and the fan electromotor of a plurality of refrigeratorys with PLC, thereby the utility model and prior art is strictly made a distinction.In the practical application, such as use Siemens small PLC programmable logic controller (PLC) replacement relay, the time relay etc. realized the control to refrigeratory, thereby improve reliability and the dirigibility of control system, the operation conditions of cooling system is made accurate judgement, and bring great convenience to repair and maintenance.The PLC programmable control system can be finished the various control to refrigeratory.
Preferably, in another embodiment: described control system adopts at least two-way Power supply, and PLC is by two-way power monitor circuit persistent surveillance two-way power supply, when power fail occurs, power supply is switched in system under PLC control, the concurrent alert signal of delivering newspaper is to the pulpit.With regard to this embodiment, system adopts the two-way Power supply, monitors simultaneously whether phase shortage of duplex feeding power supply by power monitor circuit, occurs if any any situation, and power supply can in time be switched in system, and alerting signal occurs to central control room (CCR).This self monitoring function form by redundant power is in order to guarantee the safe and reliable operation of refrigeratory control system.
Preferred, in another embodiment: described PLC also monitors main-transformer load current and main-transformer oil temperature, and PLC sends alerting signal to the pulpit when reaching warning value.For example shown in Figure 1, among the figure, Q1 to QN is isolating switch, U1 and U2 then are power monitor circuit, KM1, KM11, KM2, KM21, KMN, KMN1 then are contactor, and KMS1, KMS2 also are contactor, and KH1, KH11, KH2, KH21, KHN, KHN1 then are thermal overload relay, MB1, MB2, MBN then are Oil pump electrical machinery, and MF1, MF2, MFN then are the refrigeratory fan electromotor.Under PLC control, refrigeratory can drop into/excise, press the input/excision of main-transformer oil temperature by the main-transformer load current.
Preferred, in another embodiment: described set-up of control system has automatic and manual control model.So, not only can realize automatically control by PLC, and for manual control leaves the operating space, dispose more flexible.
Preferred, in another embodiment, under the described automatic control mode: PLC calls in the cycle wheel pattern that changes jobs with a plurality of refrigeratorys, and described a plurality of refrigeratorys are divided into work refrigeratory unit, auxiliary cooler unit, refrigeratory unit for subsequent use; Refrigeratory unit for subsequent use is in stand-by state under the default situations; Main-transformer load current or main-transformer oil temperature that the auxiliary cooler unit then obtains according to PLC are controlled by PLC, and carry out work or await orders.That is to say, under PLC control, present embodiment can be so that by taking turns cycle length under the prerequisite that changes jobs, not only can realize calling easily and flexibly the auxiliary cooler unit, and in case work or auxiliary cooler unit when breaking down, refrigeratory unit energy for subsequent use is devoted oneself to work automatically.So, present embodiment can maximizedly utilize a plurality of refrigeratorys, when guaranteeing cooling effect, and the working load of maximized balance refrigeratory.
Preferred, in another embodiment: the program of revising PLC by RS485.With regard to this embodiment, be intended to long-range the PLC program be arranged, maintain easily, in the time of need to carrying out function modifications, seldom or not need to increase and decrease device, again layout or again distribution, a working routine that only needs to revise PLC can be finished.
Preferred, in another embodiment: the switch board of control system is provided with temperature and moisture sensors, when temperature or humidity are unusual, and scavenger fan or the well heater of PLC scheduling controlling cabinet.That is to say that present embodiment is intended to the working environment of switch board self is guarded, in concrete the application, for example: when environment temperature was higher than 40 degrees centigrade, the scavenger fan that starts switch board self was lowered the temperature; When the environment temperature is lower than 35 degrees centigrade, automatically stop scavenger fan work; When occuring moist or being about to the state of dewfall or environment temperature when being lower than 5 degrees centigrade, start switch board conducting self-heating device and heat up; In case moisture is dried or when reaching the humidity threshold value of setting or temperature recovery to 13 degree centigrade, automatically stopped heating device work.
In sum, the utility model is controlled a plurality of refrigeratorys of main-transformer by PLC, has that defencive function is complete, functional reliability is high, cooling system is stable, a maintenance and maintenance workload is little, the workman is easy and simple to handle, can concentrate and the characteristics such as local operation.
If in addition with stainless steel rainwater-proof shell, the power transformer cooling protection system just can all-weather outdoor work, and price is no more than 6.5 ten thousand yuan (text display, touch-screen and distant place communication cable are in addition) by the highest configuration.Therefore, this cooling control system has the good ratio of performance to price, at power industry (power plant, power station, transformer station), Transformer-Manufacturing Trade etc., has very high practical value and high promotional value.At present, successfully be the little dragon's pool #1-#4 of power plant of state's electricity, 220KV main transformer, the dawn 220KV #1 of transformer station of Liaoning Province's Panjin electric company, #2 main transformer, Longkou, Shandong Province East Sea Thermal Power Co., Ltd, Harbin Transformer Factory, the 220KV of Kaiyuan City #1-#3 of transformer station of Geju City, Yunnan Province power administration main transformer, Harbin Power Co., Ltd. 220KV main transformer, the transformation of the users' such as the sun pool #1 of 220KV transformer station of Hunan Province Huaihua power administration, #2 main transformer transformer cooler control system and supporting, the control of having used PLC.Any quality problems do not appear in the product operation, particularly operate in 4 products of the state little dragon's pool of electricity power plant, the misoperation phenomenon do not occurring in the attack of thunder and lightning by force several times yet.
More than the control system for a plurality of refrigeratorys of main-transformer disclosed in the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand technical thought of the present utility model; Simultaneously, for those skilled in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (7)
1. control system that is used for a plurality of refrigeratorys of main-transformer, described control system is connected to described a plurality of refrigeratory, it is characterized in that: described control system comprises programmable logic controller (PLC) PLC, and PLC connects and control Oil pump electrical machinery and the fan electromotor of described refrigeratory.
2. system according to claim 1, it is characterized in that: described control system adopts at least two-way Power supply, PLC is by two-way power monitor circuit persistent surveillance two-way power supply, when power fail occurs, power supply is switched in system under PLC control, the concurrent alert signal of delivering newspaper is to the pulpit.
3. system according to claim 1 and 2, it is characterized in that: described PLC also monitors main-transformer load current and main-transformer oil temperature, and PLC sends alerting signal to the pulpit when reaching warning value.
4. system according to claim 3, it is characterized in that: described set-up of control system has automatic and manual control model.
5. system according to claim 4, it is characterized in that, under the described automatic control mode: PLC calls in the cycle wheel pattern that changes jobs with a plurality of refrigeratorys, and described a plurality of refrigeratorys are divided into work refrigeratory unit, auxiliary cooler unit, refrigeratory unit for subsequent use; Refrigeratory unit for subsequent use is in stand-by state under the default situations; Main-transformer load current or main-transformer oil temperature that the auxiliary cooler unit then obtains according to PLC are controlled by PLC, and carry out work or await orders.
6. system according to claim 4 is characterized in that: the program of revising PLC by RS485.
7. system according to claim 4, it is characterized in that: the switch board of control system is provided with temperature and moisture sensors, when temperature or humidity are unusual, scavenger fan or the well heater of PLC scheduling controlling cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220447894.5U CN202837946U (en) | 2012-09-05 | 2012-09-05 | Control system used for a plurality of coolers in main transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220447894.5U CN202837946U (en) | 2012-09-05 | 2012-09-05 | Control system used for a plurality of coolers in main transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837946U true CN202837946U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220447894.5U Expired - Lifetime CN202837946U (en) | 2012-09-05 | 2012-09-05 | Control system used for a plurality of coolers in main transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN202837946U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3032552A1 (en) * | 2014-12-09 | 2016-06-15 | ABB Technology Ltd | A cooling system for a high voltage electromagnetic induction device, a system and a method of cooling the same |
| CN105785880A (en) * | 2016-05-09 | 2016-07-20 | 国网宁夏电力公司检修公司 | System for achieving intelligent control of transformer cooler group based on double closed loops |
| CN113472060A (en) * | 2021-06-21 | 2021-10-01 | 中国长江电力股份有限公司 | Power supply control method for transformer cooler |
-
2012
- 2012-09-05 CN CN201220447894.5U patent/CN202837946U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3032552A1 (en) * | 2014-12-09 | 2016-06-15 | ABB Technology Ltd | A cooling system for a high voltage electromagnetic induction device, a system and a method of cooling the same |
| CN105785880A (en) * | 2016-05-09 | 2016-07-20 | 国网宁夏电力公司检修公司 | System for achieving intelligent control of transformer cooler group based on double closed loops |
| CN113472060A (en) * | 2021-06-21 | 2021-10-01 | 中国长江电力股份有限公司 | Power supply control method for transformer cooler |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
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| CX01 | Expiry of patent term |