CN105785880A - System for achieving intelligent control of transformer cooler group based on double closed loops - Google Patents
System for achieving intelligent control of transformer cooler group based on double closed loops Download PDFInfo
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- CN105785880A CN105785880A CN201610300017.8A CN201610300017A CN105785880A CN 105785880 A CN105785880 A CN 105785880A CN 201610300017 A CN201610300017 A CN 201610300017A CN 105785880 A CN105785880 A CN 105785880A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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Abstract
The invention relates to a system for achieving the intelligent control of a transformer cooler group based on double closed loops, and the system comprises a central management module, a plurality of motor control protection modules, and a transformer data sampling module, wherein each motor control protection module is corresponding to one cooler motor of the cooler group in a one-to-one manner, and is used for collecting the operation data of the corresponding cooler motor and feeding back the operation data to the central management module. The transformer data sampling module is used for collecting the operation data of a transformer and feeding back the operation data to the central management module. The central management module is used for managing and controlling the operation states of all coolers in the cooler group according to the operation data of the transformer and the operation data of all cooler motors. The system achieves the precise control of the oil temperature of the transformer and loads and the precise determining of a fault point of the coolers, improves the automation degree of the control of the coolers of the transformer, and is wider in application range.
Description
Technical field
The present invention relates to electromechanical control field, particularly relate to transformer cooler control field, specifically refer to a kind of system realizing transformer cooler group Based Intelligent Control based on two close cycles loop.
Background technology
The domestic control systems most to high-power transformer forced oil-circulation air cooler is relay-type air cooler control system at present; what the control of this control model and protection still adopted is that dynamo-electric logical course loop realizes, and its logic circuit is made up of devices such as various choppers, catalyst, thermorelay and electric fuses.
Owing to relay-type air-cooled control loop is made up of devices such as various choppers, catalyst, thermorelay and electric fuses, so there is a lot of defect in its running, as: what the major loop of oil-immersed pump and cooler blower fan drove employing is catalyst, thus mechanical contact is many, circuit composition complexity, fault rate is high；The protected mode of motor is that electric fuse adds thermorelay, is only capable of motor provides short circuit and overload (phase shortage) protection, it is impossible to carry out failure predication；Control system adopts relay logical control, and automaticity is low.For these reasons so that transformator be in operation reliability reduce, operation maintenance workload strengthen.Along with electrical network fast development in recent years, the raising of intelligence degree, unattended operation transformer station is on the increase, again owing to high-power transformer itself is worth higher, the impact caused after damage is bigger, thus require that the reliability of Transformer Forced-Air Cooling System improves and temperature can carry out remote monitoring, it is achieved intelligentized control method, and traditional air cooler control system can not complete.
After 2005, domestic occur in that the method automatically controlled realizing transformer cooling system with elements such as programmable controller PLC, and achieve some New function, such as: according to the method for operation of certain periodic transformation cooling unit, make cooling unit blower fan group take turns to operate, balance use；Monitor system with the integrated automation of transformation stations to communicate, it is achieved remotely monitor.In control program, expert is had to propose control thinking more reasonable, that optimize, as predicted load with oil temperature and rate of temperature change, by temperature and contact transformer station's practical situation in conjunction with rate of temperature change again and carry out automatically controlling switching cooling unit, changing comprehensive switching cooler package etc. according to transformer load and oil temperature, temperature of oil in transformer can be made to meet the requirement that transformator runs, good energy-saving effect can be reached again.But in actual application, the function that PLC realizes is fairly simple, interface operation is unfriendly, and the ins and outs of PLC are unfamiliar with by field operator, problem of investigating during fault is slow, even has no way of doing it, and affects investigating in time and processing of chiller system fault.
Summary of the invention
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that a kind of be capable of temperature of oil in transformer, accurately the controlling and the intelligence control system accurately differentiating, improving transformer cooler auto-control degree of Cooler Fault point of load.
To achieve these goals, the realizing the system of transformer cooler group Based Intelligent Control based on two close cycles loop there is following composition of the present invention:
A kind of system realizing transformer cooler group Based Intelligent Control based on two close cycles loop, it is characterised in that described system includes central management module, several motor controls protection module and transformator data sampling module, wherein,
Each described motor controls protection module and the cooler motor one_to_one corresponding in cooler package, and described motor controls protection module in order to gather the service data of each cooler motor and to feed back to described central management module；
Described transformator data sampling module is in order to gather transformator service data and to feed back to described central management module；
Described central management module is in order to the duty of each cooler in the status data management and control cooler package according to described transformer state data and each cooler motor.
It is preferred that the service data of described cooler motor includes the current value of each cooler motor, the service data of described transformator includes transformer oil gentleness current value.
Connecting it is preferred that described system also includes prepared auto restart module, described prepared auto restart module and central management module, in order to control the switching of two sections of power supplys, two sections of described power supplys are with thinking described system power supply.
More preferably, described prepared auto restart module includes power data AD sampling unit, described power data AD sampling unit includes power supply analog quantity sampling subelement and on and off switch amount sampling subelement, described power data AD sampling unit is in order to gather the voltage of I, II section incoming power of power supply, electric current, the position of the switch and busbar voltage and to feed back to described prepared auto restart module.
More preferably, described prepared auto restart module also includes:
Tripping operation control unit, in order to keep current discharge state during in hardware dead electricity or with central management module lost contact；
Nonvolatile memory cell, in order to record all sampled signal numerical value preserving the power failure moment.
Connecting it is preferred that described system also includes human-computer interaction module, described human-computer interaction module and central management module, the switching of power supply, cooler unit is controlled by the operation in order to receive user.
Preferably; module when described system also includes pair; when described pair, module controls protection module with described central management module, several motor and transformator data sampling module is connected; during in order to control protecting module and transformator data sampling module to carry out synchronization pair to described central management module, several motor, and carry out power failure record ripple and Cooler Fault record ripple.
It is preferred that described central management module also includes remote monitoring unit, described remote monitoring unit is in order to pass through network push to user by transformator and cooler running status, and receives the motor moving model definite value parameter that user is remotely located.
Preferably; described motor controls protection module and includes cooler data AD sampling unit; described cooler data AD sampling unit includes cooler analog quantity sampling subelement and cooler switching value sampling subelement, and described cooler data AD sampling unit is in order to gather the current data of each cooler motor and catalyst, circuit breaker position signal and to feed back to described central management module.
More preferably, described motor controls protection module and also includes:
Tripping operation control unit, in order to keep current discharge state during in hardware dead electricity or with central management module lost contact；
Nonvolatile memory cell, in order to record all sampled signal numerical value preserving the power failure moment.
More preferably, described cooler data AD sampling unit also includes self calibration subelement, and described self calibration subelement is in order to be automatically adjusted the temperature drift effects that input signal is produced by ambient temperature.
Have employed the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop in this invention, have the advantages that
(1) running current of the oil temperature of transformator, load current and cooler unit can be monitored in real time, be automatically adjusted input and the excision of forced air cooler unit according to these data and transformator temperature control strategy and the operation reserve of cooler, operation time；
(2) operation conditions of forced-oil-air cooling transformator and air-cooled unit can be carried out monitor in real time, ensure the operation that holds water of transformer air-cooled oil pump, fan electromotor, thus ensureing that transformator runs in rational temperature range, it is achieved temperature of oil in transformer, accurately controlling of load and accurately differentiating of Cooler Fault point；
(3) can by multiple stage air cooler control system networking, control or dispatch to communicate with a distant place by Ethernet, a distant place controls or dispatches the operation conditions that can remotely monitor transformator, monitors the operating condition of any one group of cooler package, it is achieved the input of long-range cooler package and excision.
Accompanying drawing explanation
Fig. 1 is the control principle drawing of the temperature of oil in transformer closed loop control submodule of the present invention.
Fig. 2 is the control principle drawing of the cooler motor closed loop control submodule of the present invention.
Fig. 3 is the system construction drawing realizing transformer cooler group Based Intelligent Control based on two close cycles loop of the present invention.
Fig. 4 is the system interface figure realizing transformer cooler group Based Intelligent Control based on two close cycles loop of the present invention.
Detailed description of the invention
In order to more clearly describe the technology contents of the present invention, conduct further description below in conjunction with specific embodiment.
The present invention realizes based on two close cycles loop that the system of transformer cooler group Based Intelligent Control includes central management module, several motor controls protection module and transformator data sampling module; there is double-closed-loop control loop; one is transformer oil temperature control loop (such as Fig. 1); in systems management module in centre has oil temperature supervisory circuit; after the oil temperature of systematic sampling transformator, load current signal; feedback is regulated as temperature of oil in transformer; when oil temperature exceedes oil temperature limits; central management module regulates the operating of each group of cooler, to regulate temperature of oil in transformer.In system, measuring cell is the AD sample circuit in oil temperature supervisory circuit, and actuator is cooler, and controlled device is temperature of oil in transformer；Two is that cooler motor controls loop (such as Fig. 2), cooler motor controls to be carried out mechanism in closed loop at first, control in closed loop to be controlled device at second, the all cooler fan electromotors of systematic sampling, Oil pump electrical machinery loop electric current, adjustment and the feedback parameter of system is controlled as cooler motor, in conjunction with motor moving model definite value, control cooler and run well.The measuring cell of cooler closed-loop control system is the AD sample circuit that motor controls protection module, and actuator is the relay output loop that in system, motor controls protection module, and controlled device is cooler.
Wherein, central management module can adopt high-performance arm processor, has abundant serial line interface, spi bus interface and two Ethernet interfaces.The oil temperature of real-time sampling transformator, load current, in conjunction with the operation conditions of cooler; accumulated running time, control protection module by universal serial bus and subordinate's motor and connect, carry out the allotment switching of overall situation cooler package; the operation of unified management whole system, makes cooler package equilibrium operating；Each group of motor can be obtained and control the cooler working of protection module, operating current etc.；Connected by independent serial ports and human-computer interaction module, operations staff can pass through human-computer interaction module and understand the operation conditions of transformer cooling system, local operation power supply, cooler unit throwing move back, real can help operation maintenance personnel rapidly removing faults by fault warning information simultaneously；Connected by spi bus and prepared auto restart module, it is possible to obtain the state of current two sections of power supplys, voltage, current information, it is also possible to control the switching of two sections of power supplys.
Motor controls protection module can adopt high-performance microprocessor; there is abundant AD sampling channel, serial line interface; can high-speed sampling cooler fan electromotor, the three-phase current signal of Oil pump electrical machinery and cooler breaker contacts device position signalling; calculating current value and protection definite value contrast; realize the important electric motor protecting such as overcurrent protection, rotation-clogging protection, fast tripping protection, open-phase protection etc., three-phase imbalance protection; add time delay when current value exceedes protection definite value, send out tripping operation exit instruction；Motor controls protection module and has a tripping operation control loop; perform tripping operation exit instruction; trip(ping) circuit adopts latch-in relay, and during in hardware dead electricity or with central management module lost contact, exit relay continues to keep current discharge state, it is ensured that cooler properly functioning；Motor controls protection module and has serial communication interface, it is possible to by giving central management module on serial ports, cooler running status, action event etc. are done systematic analysis.Motor controls protection module and also has a nonvolatile semiconductor memory member, it is possible to record preserves motor and breaks down all sampled signal numerical value in moment, makes emergency review, fault analysis and handling in order to the later stage；The each motor control unit of system is separate, and any cell breaks down does not affect the properly functioning of other motor control units, it is ensured that each cooler reliably operates, and the reliability of system is guaranteed.
In preferably embodiment, system also include prepared auto restart module, pair time module and human-computer interaction module (such as Fig. 3), wherein:
Prepared auto restart module can adopt high-performance arm processor, has abundant AD sampling channel, spi bus interface, serial line interface.The voltage of two sections of incoming powers of high-speed sampling, current signal, after busbar voltage and power circuit breaker catalyst position signalling, calculate effective value, sample voltage value and prepared auto restart voltage definite value are contrasted, logical judgment is carried out in conjunction with current breaker contacts device position signalling, when voltage x current value meets prepared auto restart operation condition, send out tripping operation exit instruction；Prepared auto restart module has a tripping operation and controls loop, performs tripping operation exit instruction, and trip(ping) circuit adopts latch-in relay, and during in hardware dead electricity or with central management module lost contact, exit relay continues to keep current discharge state, it is ensured that cooler properly functioning；Prepared auto restart module has serial communication interface, it is possible to by giving central management module on serial ports, power supply running status, action event etc. are done systematic analysis.Prepared auto restart module also has a nonvolatile semiconductor memory member, it is possible to record preserves all sampled signal numerical value in power failure moment, makes emergency review, fault analysis and handling in order to the later stage.
System adopts high-speed AD Sampling techniques, the voltage of real-time sampling I, II section incoming power, electric current, the position of the switch and bus voltage signal, through high-performance processor high-speed computation, is analyzed processing, it is achieved stand-by power supply automatic switching function.System can by the voltage x current information of two sections of power supplys, and real-time status uploads to master control room by network.When chiller system power failure, system can record the storage voltage of trouble point, electric current, as consequent malfunction analysis；AD front end has filtering, amplification, isolation circuit；AD sampling has self-calibrating capabilities, it is possible to be automatically adjusted the temperature drift effects that input signal is produced by ambient temperature；There is switching value sampled signal and include power circuit breaker position, catalyst position.
Pair time module can adopt field programmable gate array (FPGA), there is an IRIG-B code signaling conversion circuit, a serial line interface.After accessing IRIG-B code signal, through signaling conversion circuit, converting a signal into Transistor-Transistor Logic level, FPGA sampling Transistor-Transistor Logic level is decoded, and temporal information is exported on universal serial bus, also export a pps pulse per second signal simultaneously, when carrying out synchronization pair to other unit of system, after whole system time synchronized, it is possible to carry out power failure record ripple, Cooler Fault record ripple, provides time reference for consequent malfunction analysis.
Human-computer interaction module can adopt 7 cun of industrial RGB multidigit color liquid crystal touch screens, there is the operation conditions of the picture display air cooling system of abundant image, current transformer state, each the group current state of cooler, history run state can be checked by touch screen local operation when facilitating operations staff to need, alarm record, curvilinear trend, and run the information such as form；Operations staff can on the spot on the touchscreen the input of operating cooler group exit (such as Fig. 4)；Human-computer interaction module can also have system state indicator, alarm indicator, facilitates operations staff to check.
This system can adopt " back of the body inserts formula structure; guide tracked installation " mode to concentrate in a hardware chassis in example, in hardware, unit board is inserted on backboard by interface slot, backboard possesses multiple bus, realize the information transmission between each unit board by core bus and control, it is also possible to looking on-site actual situations distribution and place.System can also extend access motor and control protection module, can pass through other network not limited in theory and be extended, and access motor controls the quantity of protection module and do not limit.
Have employed the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop in this invention, the running current of the oil temperature of transformator, load current and cooler unit can be monitored in real time, be automatically adjusted input and the excision of forced air cooler unit according to these data and transformator temperature control strategy and the operation reserve of cooler, operation time；The operation conditions of forced-oil-air cooling transformator and air-cooled unit can be carried out monitor in real time, ensure the operation that holds water of transformer air-cooled oil pump, fan electromotor, thus ensureing that transformator runs in rational temperature range, it is achieved temperature of oil in transformer, accurately controlling of load and accurately differentiating of Cooler Fault point；Can by multiple stage air cooler control system networking, control or dispatch to communicate with a distant place by Ethernet, a distant place controls or dispatches the operation conditions that can remotely monitor transformator, monitor the operating condition of any one group of cooler package, realize input and the excision of long-range cooler package, raising transformer equipment stable operation and reduction operation maintenance personnel workload are had great significance, there is wide market prospect and good economic benefit.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that still may be made that various amendment and conversion are without departing from the spirit and scope of the present invention.Therefore, specification and drawings is regarded in an illustrative, rather than a restrictive.
Claims (11)
1. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop, it is characterised in that described system includes central management module, several motor controls protection module and transformator data sampling module, wherein,
Each described motor controls protection module and the cooler motor one_to_one corresponding in cooler package, and described motor controls protection module in order to gather the service data of each cooler motor and to feed back to described central management module；
Described transformator data sampling module is in order to gather transformator service data and to feed back to described central management module；
Described central management module is in order to the duty of each cooler in the service data management and control cooler package according to described transformator service data and each cooler motor.
2. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 1, it is characterized in that, the service data of described cooler motor includes the current value of each cooler motor, and the service data of described transformator includes transformer oil gentleness current value.
3. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 1, it is characterized in that, described system also includes prepared auto restart module, described prepared auto restart module and central management module connect, in order to control the switching of two sections of power supplys, two sections of described power supplys are with thinking described system power supply.
4. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 3, it is characterized in that, described prepared auto restart module includes power data AD sampling unit, described power data AD sampling unit includes power supply analog quantity sampling subelement and on and off switch amount sampling subelement, and described power data AD sampling unit is in order to gather the voltage of I, II section incoming power of power supply, electric current, the position of the switch and busbar voltage and to feed back to described prepared auto restart module.
5. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 3, it is characterised in that described prepared auto restart module also includes:
Tripping operation control unit, in order to keep current discharge state during in hardware dead electricity or with central management module lost contact；
Nonvolatile memory cell, in order to record all sampled signal numerical value preserving the power failure moment.
6. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 1, it is characterized in that, described system also includes human-computer interaction module, described human-computer interaction module and central management module connect, and the switching of power supply, cooler unit is controlled by the operation in order to receive user.
7. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 1; it is characterized in that; module when described system also includes pair; when described pair, module controls protection module with described central management module, several motor and transformator data sampling module is connected; during in order to control protecting module and transformator data sampling module to carry out synchronization pair to described central management module, several motor, and carry out power failure record ripple and Cooler Fault record ripple.
8. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 1, it is characterized in that, described central management module also includes remote monitoring unit, described remote monitoring unit is in order to pass through network push to user by transformator and cooler running status, and receives the motor moving model definite value parameter that user is remotely located.
9. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 1; it is characterized in that; described motor controls protection module and includes cooler data AD sampling unit; described cooler data AD sampling unit includes cooler analog quantity sampling subelement and cooler switching value sampling subelement, and described cooler data AD sampling unit is in order to gather the current data of each cooler motor and catalyst, circuit breaker position signal and to feed back to described central management module.
10. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 9, it is characterised in that described motor controls protection module and also includes:
Tripping operation control unit, in order to keep current discharge state during in hardware dead electricity or with central management module lost contact；
Nonvolatile memory cell, in order to record all sampled signal numerical value preserving the power failure moment.
11. the system realizing transformer cooler group Based Intelligent Control based on two close cycles loop according to claim 9, it is characterized in that, described cooler data AD sampling unit also includes self calibration subelement, and described self calibration subelement is in order to be automatically adjusted the temperature drift effects that input signal is produced by ambient temperature.
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| CN201610300017.8A CN105785880A (en) | 2016-05-09 | 2016-05-09 | System for achieving intelligent control of transformer cooler group based on double closed loops |
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Cited By (9)
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| CN106557054A (en) * | 2017-01-05 | 2017-04-05 | 上海泽鑫电力科技股份有限公司 | The system and method that the failure of transformer cooler intelligent controlling device is repaired automatically |
| CN106597177A (en) * | 2017-01-06 | 2017-04-26 | 国家电网公司 | Method for determining full shutdown of air-cooling unit of transformer by using analog value and switching value |
| CN106646063A (en) * | 2017-01-06 | 2017-05-10 | 国家电网公司 | Method of determining transformer forced air cooling full cut-off by using transformer cooler load current |
| CN107450458A (en) * | 2017-07-28 | 2017-12-08 | 陕西金源自动化科技有限公司 | A kind of energy saving transformer cooler switch board and its control method |
| CN108803704A (en) * | 2018-07-26 | 2018-11-13 | 陕西金源自动化科技有限公司 | A kind of controller and its control method of transformer cooler |
| CN110794736A (en) * | 2019-11-12 | 2020-02-14 | 西安子国微科技有限公司 | Automatic control airplane wheel cooling control device and control method |
| CN111337744A (en) * | 2020-04-03 | 2020-06-26 | 苏州华电电气股份有限公司 | Transformer operation energy efficiency and/or loss monitoring device |
| CN111556121A (en) * | 2020-04-23 | 2020-08-18 | 陕西安得电力设备制造有限公司 | Fault early warning system and method for online detection of intelligent Internet of things of transformer air cooling system |
| TWI796047B (en) * | 2021-12-13 | 2023-03-11 | 中華電信股份有限公司 | System and method for the analysis and prediction of transformer and computer program product thereof |
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| CN106557054A (en) * | 2017-01-05 | 2017-04-05 | 上海泽鑫电力科技股份有限公司 | The system and method that the failure of transformer cooler intelligent controlling device is repaired automatically |
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| CN110794736A (en) * | 2019-11-12 | 2020-02-14 | 西安子国微科技有限公司 | Automatic control airplane wheel cooling control device and control method |
| CN111337744A (en) * | 2020-04-03 | 2020-06-26 | 苏州华电电气股份有限公司 | Transformer operation energy efficiency and/or loss monitoring device |
| CN111556121A (en) * | 2020-04-23 | 2020-08-18 | 陕西安得电力设备制造有限公司 | Fault early warning system and method for online detection of intelligent Internet of things of transformer air cooling system |
| TWI796047B (en) * | 2021-12-13 | 2023-03-11 | 中華電信股份有限公司 | System and method for the analysis and prediction of transformer and computer program product thereof |
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Application publication date: 20160720 |