CN101943921A - Intelligent control method and intelligent control device of transformer cooling system - Google Patents
Intelligent control method and intelligent control device of transformer cooling system Download PDFInfo
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- CN101943921A CN101943921A CN2010102513441A CN201010251344A CN101943921A CN 101943921 A CN101943921 A CN 101943921A CN 2010102513441 A CN2010102513441 A CN 2010102513441A CN 201010251344 A CN201010251344 A CN 201010251344A CN 101943921 A CN101943921 A CN 101943921A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
- Y04S20/244—Home appliances the home appliances being or involving heating ventilating and air conditioning [HVAC] units
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Abstract
The invention discloses an intelligent control method and an intelligent control device of a transformer cooling system. The method comprises the following steps: detecting the cooling oil temperature and the load current value of the upper layer and the lower layer of a transformer; determining the group number, the table number and the time of a start/ stop cooler; starting/ stopping at least one oil pump; starting/ stopping at least one fan in a delay mode; detecting the current of the oil pump and the fan; entering a device debug mode; and recording events. The device comprises a DSP and ARM double-core hardware platform, wherein a DSP plate comprises a cooling oil temperature data acquisition and analysis module, an oil pump motor current data acquisition and processing module, an oil pump motor control module, a fan motor current data acquisition and processing module and a fan motor control module; and the ARM plate comprises a user interface, a communication module and a data storage module. The invention combines control, relay protection, real-time monitoring and diagnosis as a whole, has more intelligent on-line real-time control, can define and configure the parameter of the transformer cooling system, improves the production efficiency and saves the operation and maintenance cost of the transformer.
Description
Technical field
The present invention relates to the transformer cooling, particularly relate to a kind of transformer cooling system intelligence control method and intelligence controlling device.
Background technology
Existing transformer operating standard requirement, the input of main-transformer cooler package and withdraw from and will control automatically by control system according to main transformer upper strata cold oil temperature or transformer operating load.Traditional control system generally comprises programmable logic controller (PLC) (Programmable Logic Controller, breviary is PLC), auxiliary reclay, the time relay, A.C. contactor, fuse and thermal overload relay, the duty of cooler package can not onlinely be adjusted for operation, auxiliary, standby and stop; And have following defective: system forms complicated, and failure rate is higher; By the control of getting an electric shock firmly of cold oil temperature, easily cause the cooler package frequent starting; Thermal overload relay is incomplete to the defencive function of cooler package.If take transformer in service should be undertaken and be no less than 3 minutes anti-accident measures each interval time by platform when switching oil-immersed pump, existing control system loop be also further complicated, is unfavorable for maintainer's operation maintenance more.
Summary of the invention
A technical matters to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of transformer cooling system intelligence control method is provided.
Another technical matters to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of transformer cooling system intelligence controlling device is provided.
The technical matters of transformer cooling system intelligence control method of the present invention is solved by the following technical programs.
This transformer cooling system intelligence control method has following steps successively:
1) detects transformer levels cold oil temperature and load current value;
2) the cooler package number of determining to start or stop, platform number, time
According to transformer levels cold oil temperature and rate of change and variation tendency, determine to start or stop the quantity of cooler package;
According to switching value signal, electric current and the voltage of oil pump in the cooler package and blower fan, determine to start or stop the platform number of cooler package;
According to transformer capacity, load, cold oil temperature scope, cold oil temperature rate of change, refrigeratory operate power and operation test parameter: oily flow velocity, cooler package fault state, determine the cooler package opening time;
3) start or stop at least one table oil pump
According to the accumulated running time of every cooler package, select the shortest oil pump input of accumulated running time according to balanced using priciple;
4) delayed startup or stop at least one typhoon machine
Starting oil pump when the cold oil flow velocity reaches setting value, according to the accumulated running time of every cooler package, select the shortest blower fan input of accumulated running time according to balanced using priciple, make and pressure and the cold oil temperature even variation that heating radiator is interior be beneficial to improve cooler package and transformer's life span;
5) all oil pumps and blower fan current detecting
Cooler package start or stop with operational process in, whether the function that detects each cooler package in real time is normal, gather the interior oil pump of each cooler package and switching value signal, electric current and the voltage of blower fan in real time, carry out real-time analysis, comprehensively judge the function of cooler package;
6) access to plant debugging mode
By telecommunication or local user interface access to plant debugging mode, detect electric current, voltage and the switching value of each cooling group successively, analyze it and whether be in normal condition, if a certain cooling group fault, it will be put into the fault Groups List, before the maintenance restore funcitons not tested and start, device is after finishing debugging, produce examining report, after the device debugging state finishes, switch to running status;
7) logout
According to the incident order of severity, described logout is divided into information, unusual and alarm, recorded content comprises main operation, mistake and the fault of each correlation module to taking place in device initialization and the operational process, described logout writes same logout file and forever preserves, so that review and correct.
Described information is the record of user's normal running;
The described operation exception that comprises that unusually device exists not to be influenced major function or needn't alert users to get involved processing immediately, and the debugging that device exists catastrophic failure also needn't alarm in the field adjustable process is unusual;
Described alarm is that device exists the catastrophic failure lead to grave consequences must alert users to get involved the operation exception of processing immediately.
The technical matters of transformer cooling system intelligence control method of the present invention is solved by following further technical scheme.
Described step 3) is when starting oil pump, simultaneously its malfunction is judged, if fault is arranged, send trip signal by oil pump Control Software module, fault flag is set, list not Work List in, before maintenance, no longer attempt to enable, by the user interface alarm, substitute with normally functioning emergency bearing oil pump more simultaneously, the replacement of fault oil pump and cold oil temperature are irrelevant.
Described step 3) is to start or stop successively in 3 minutes at least at interval in twos according to the equalization of pressure principle when starting or stoping at least one table oil pump.
Described step 4) is when starting blower fan, simultaneously its malfunction is judged, if fault is arranged, send trip signal by blower fan Control Software module, fault flag is set, list not Work List in, before maintenance, no longer attempt to enable, by the user interface alarm, substitute with normally functioning standby fan more simultaneously, the replacement of fault blower fan and cold oil temperature are irrelevant.
Described step 4) is just to start or stop in 3 minutes at least at interval in twos when starting or stoping at least one typhoon machine.
Described step 5) detects to be, Oil pump electrical machinery overload undesired to operating oil pump flow velocity, phase shortage, short circuit and to provide emergency protection to operating blower motor overload, phase shortage, short circuit; break down if judge; fault flag is set; send trip signal by oil pump control module or blower fan control module, alarm by user interface simultaneously.To guarantee the cooling control system operate as normal, prevent that the transformer cooling oil temperature from spending height.
It is to provide the dual power supply open-phase protection to operating oil pump and to the power supply of operating blower fan that described step 5) detects, if judge and break down, just disconnects current power supply, automatically switches to another standby power supply.
The technical matters of transformer cooling system intelligence control method of the present invention is solved by following further again technical scheme.
Before described step 1), comprise that control system powers on, finishes initiation parameter setting, control system self check, the phase shortage inspection of cooling system power source bus and the inspection of transformer load switch connection.
If the control system self check has fault, fault flag is set, simultaneously alarm.
If the inspection of cooling system power source bus phase shortage has fault, fault flag is set.
The technical matters of transformer cooling system intelligence controlling device of the present invention is solved by the following technical programs.
This transformer cooling system intelligence controlling device, comprise control box and be arranged on the interior intelligence control circuit of described control box, be used for control at least two group transformer cooler groups, described cooler package comprises heating radiator, oil pump and blower fan, described oil pump drives the cold oil circulation of described heating radiator inside, described blower fan is installed in described heating radiator appearance to its surface blowing heat radiation, is monitored in real time by intelligence control circuit by the electric current of blower fan and Oil pump electrical machinery.
The characteristics of this transformer cooling system intelligence controlling device are:
Adopt DSP and ARM double-core hardware platform, be provided with dsp board and ARM plate, described dsp board and described ARM plate are implemented to dispose, monitor at local and far-end by the hardware bus communication, and according to the unified standard networking of intelligent grid.
Described dsp board comprises cold oil temperature data acquisition and analysis module, the Oil pump electrical machinery current data is gathered and processing module, the Oil pump electrical machinery control module, collection of blower motor current data and processing module and blower motor control module, described Oil pump electrical machinery control module is connected with Oil pump electrical machinery, and respectively with described cold oil temperature data acquisition and analysis module, the collection of Oil pump electrical machinery current data is connected with processing module, described blower motor control module is connected with blower motor, and respectively with described cold oil temperature data acquisition and analysis module, the collection of blower motor current data is connected with processing module, described dsp board carry out data acquisition comprise to the time, analyze, control output, alarm output and to the time function, event information and related data are sent to the ARM plate;
Described ARM plate comprises user interface, communication module and data memory module, described communication module and described cold oil temperature data acquisition and analysis module are by the hardware bus communication, described ARM plate is finished interface display, telecommunication and data storage function, by the user by long-range or local interface control system, data query and modification parameter.
The technical matters of transformer cooling system intelligence controlling device of the present invention is solved by following further technical scheme.
Described cold oil temperature data acquisition and analysis module, comprise cold oil temperature sensor and data processing and analysis module, be used to detect transformer levels cold oil temperature and load current value, and according to load current value and rising or decline, rise and fall in conjunction with transformer cold oil temperature, need to determine the cooling group quantity and the time of startup, and malfunction and the working time of putting down in writing all blower fans and oil pump, to judge the cooler package number that specifically starts or stops, platform number, time, and send corresponding order to oil pump control module and blower fan control module, send Oil pump electrical machinery respectively by oil pump control module and blower fan control module again and blower motor opens/stop order, the order that described cold oil temperature data acquisition and analysis module are sent, the malfunction of each cooling group, the work cumulative time all writes historical record.
Judge whether to reach the critical value of start and stop refrigeratory according to the cold oil temperature value that collects by professional algorithm, can be divided into following steps:
1) gathers the cold oil temperature that cold oil temperature sensor measures by the sampling rate of setting, calculate average cold oil temperature by following formula;
In the formula (1):
K1: the actual cold oil temperature of transformer is converted into the analog quantity scale-up factor;
The K2:DSP digital-to-analogue transforms scale-up factor;
Ni: the transformer cold oil temperature measured value that disperses;
2) calculate cold oil temperature predicted value
Measured value θ is carried out transformer cold oil temperature being divided into several different zones after mean value smoothing handles.In each zone, be to rise or downward trend according to cold oil temperature changing value (Δ θ), and consider the start-stop time and the real system condition calculating cold oil temperature predicted value of unit;
T＝θ+αΔθ(2)
In the formula (2):
Δ θ: transformer cold oil temperature 2min rate of change (℃/minute);
α: adjustable integral factor, take all factors into consideration value according to capacity, cold oil temperature scope, cold oil temperature rate of change, radiating condition and cooler package power and the running test of transformer.α is big when the cold oil temperature raises, and α is little during reduction, and cooler package just can start in advance, and hysteresis stops, and to satisfy transformer quick heating, the slow characteristics of cooling, transformer cold oil temperature is controlled in the setting range;
3) start-stop time and the platform number of decision cooler package
According to load current size and rise or descend, in conjunction with the rise and fall of transformer cold oil temperature, the cooler package number of determining to start or stop, platform number, time, i.e. t value;
t＝β(3)
In the formula (3):
T: cooler package start-stop time (min);
β: adjustable integral factor, take all factors into consideration value according to capacity, cold oil temperature scope, cold oil temperature rate of change, radiating condition and cooler package power and the running test of transformer.
Described Oil pump electrical machinery current data is gathered and processing module, comprise the Oil pump electrical machinery current data of the connecting collection current transformer, Oil pump electrical machinery current data isolated amplifier and the Oil pump electrical machinery current data analog to digital converter that connect successively with Oil pump electrical machinery, be used to gather current signal, and current signal be converted to digital signal through Oil pump electrical machinery current data isolated amplifier and Oil pump electrical machinery current data analog to digital converter by Oil pump electrical machinery; Also comprise the switching value input circuit that connects successively, be used to gather the switching value signal of Oil pump electrical machinery, isolate being converted to digital signal by photoelectricity.The current signal that collection of described Oil pump electrical machinery current data and processing module the are gathered Oil pump electrical machinery in real time line data analysis of going forward side by side, analysis result is transferred to the oil pump control module, described analysis result comprises whether oil pump has overload, phase shortage or short circuit, if overload, phase shortage or short circuit are arranged, send corresponding order to the oil pump control module, carry out corresponding Oil pump electrical machinery by the oil pump control module again and stop order, carry out trip protection, and its protection tripping operation information uploading is registered in described cold oil temperature data acquisition and analysis module; Send corresponding order by temperature data acquisition and analysis module to the blower fan control module, stop order by execution of blower fan control module and the blower motor that the tripping operation oil pump belongs to same cooling group again, carry out the delay tripping protection.
Described Oil pump electrical machinery control module; comprise the relay and the contactor that connect successively; be used to receive the order of cold oil temperature data acquisition and analysis module; send corresponding Oil pump electrical machinery and open/stop platform number and the time that order determines to start oil pump; receive the order of oil pump digital sampling and processing when also being used for oil pump overload, phase shortage or short circuit being arranged; carry out corresponding Oil pump electrical machinery and stop order, carry out trip protection.
Described blower motor current data receives and processing module, comprise blower motor current data received current mutual inductor, blower motor current data isolated amplifier and the blower motor current data analog to digital converter of connecting that connect successively with blower motor, be used to gather current signal, and current signal be converted to digital signal through blower motor current data isolated amplifier and blower motor current data analog to digital converter by blower motor; Also comprise the switching value input circuit that connects successively, be used to gather the switching value signal of blower motor, isolate being converted to digital signal by photoelectricity.The current signal that collection of described blower fan current data and processing module the are gathered blower motor in real time line data analysis of going forward side by side, analysis result is transferred to the blower fan control module.Described analysis result comprises whether blower fan has overload, phase shortage or short circuit, if overload, phase shortage or short circuit are arranged, send corresponding order to the blower fan control module, carry out corresponding blower motor by the blower fan control module again and stop order, carry out trip protection, and its protection tripping operation information uploading is registered in described cold oil temperature data acquisition and analysis module; Send corresponding order by temperature data acquisition and analysis module to the oil pump control module, stop order by execution of oil pump control module and the Oil pump electrical machinery that the tripping operation blower fan belongs to same cooling group again, carry out the delay tripping protection.
Described blower motor control module; comprise the relay and the contactor that connect successively; be used to receive the order of cold oil temperature data acquisition and analysis module; send corresponding blower motor and open/stop blower fan platform number and the time that startup is determined in order; receive the order of blower fan digital sampling and processing when also being used for blower fan overload, phase shortage or short circuit being arranged; carry out corresponding blower motor and stop order, carry out trip protection.
The technical matters of transformer cooling system intelligence controlling device of the present invention is solved by following further again technical scheme.
Described cooler package is symmetrically distributed around transformer, and when starting or stoping a cooler package, also another cooler package to symmetry says the word simultaneously, helps reducing vibration and noise.
Described control box is mounted in control box on the transformer, be fixed on a kind of in ground around the transformer or the control box on the pillar.
The beneficial effect that the present invention is compared with the prior art is:
The present invention integrates control, relay protection, monitors in real time and diagnoses.Owing to realized temperature prediction, made online in real time control intelligent more.Its remote communicating function can promote the intellectuality of transformer station by the unified standard networking.Can define and dispose the transformer cooling system parameter, enhance productivity, save the operation and the maintenance cost of transformer.Can also control (Supervisory Control And Data Acquisition, breviary is SCADA) system integration with supervision with the data acquisition of electrical network, improve the automatization level of substation management.
Description of drawings
Fig. 1 is the flow chart of steps of the embodiment of transformer cooling system intelligence control method of the present invention;
Fig. 2 is the composition block scheme of the embodiment of transformer cooling system intelligence controlling device of the present invention;
Fig. 3 is the position view of Fig. 2 intelligence controlling device at transformer cooling system.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
A kind of transformer cooling system intelligence controlling device shown in Fig. 2,3, comprise control box and be arranged on the interior intelligence control circuit of control box, be used to control two groups of transformer cooler groups, cooler package comprises heating radiator, oil pump and blower fan, oil pump drives the cold oil circulation of heating radiator inside, blower fan is installed in the heating radiator appearance to its surface blowing heat radiation, is monitored in real time by intelligence control circuit by the electric current of blower fan and Oil pump electrical machinery.
Comprise DSP and ARM double-core hardware platform, be provided with dsp board and ARM plate, dsp board and ARM plate are implemented configuration, are monitored at local and far-end by the hardware bus communication, and according to the unified standard networking of intelligent grid.
Dsp board comprises cold oil temperature data acquisition and analysis module, the Oil pump electrical machinery current data is gathered and processing module, the Oil pump electrical machinery control module, collection of blower motor current data and processing module and blower motor control module, the Oil pump electrical machinery control module is connected with Oil pump electrical machinery, and respectively with cold oil temperature data acquisition and analysis module, the collection of Oil pump electrical machinery current data is connected with processing module, the blower motor control module is connected with blower motor, and respectively with cold oil temperature data acquisition and analysis module, the collection of blower motor current data is connected with processing module, dsp board carry out data acquisition comprise to the time, analyze, control output, alarm output and to the time function, event information and related data are sent to the ARM plate.
The ARM plate comprises user interface, communication module and data memory module, communication module and cold oil temperature data acquisition and analysis module are by the hardware bus communication, the ARM plate is finished interface display, telecommunication and data storage function, by the user by long-range or local interface control system, data query and modification parameter.
Cold oil temperature data acquisition and analysis module, comprise cold oil temperature sensor and data processing and analysis module, be used to detect transformer levels cold oil temperature and load current value, and according to load current value and rising or decline, rise and fall in conjunction with transformer cold oil temperature, need to determine the cooling group quantity and the time of startup, and malfunction and the working time of putting down in writing all blower fans and oil pump, to judge the cooler package number that specifically starts or stops, platform number, time, and send corresponding order to oil pump control module and blower fan control module, send Oil pump electrical machinery respectively by oil pump control module and blower fan control module again and blower motor opens/stop order, the order that described cold oil temperature data acquisition and analysis module are sent, the malfunction of each cooling group, the work cumulative time all writes historical record.
The Oil pump electrical machinery current data is gathered and processing module, comprise the Oil pump electrical machinery current data of the connecting collection current transformer, Oil pump electrical machinery current data isolated amplifier and the Oil pump electrical machinery current data analog to digital converter that connect successively with Oil pump electrical machinery, be used to gather current signal, and current signal be converted to digital signal through Oil pump electrical machinery current data isolated amplifier and Oil pump electrical machinery current data analog to digital converter by Oil pump electrical machinery; Also comprise the switching value input circuit that connects successively, be used to gather the switching value signal of Oil pump electrical machinery, isolate being converted to digital signal by photoelectricity.The current signal that collection of Oil pump electrical machinery current data and processing module the are gathered Oil pump electrical machinery in real time line data analysis of going forward side by side, analysis result is transferred to the oil pump control module, analysis result comprises whether oil pump has overload, phase shortage or short circuit, if overload, phase shortage or short circuit are arranged, send corresponding order to the oil pump control module, carry out corresponding Oil pump electrical machinery by the oil pump control module again and stop order, carry out trip protection, and its protection tripping operation information uploading is registered in cold oil temperature data acquisition and analysis module; Send corresponding order by temperature data acquisition and analysis module to the blower fan control module, stop order by execution of blower fan control module and the blower motor that the tripping operation oil pump belongs to same cooling group again, carry out the delay tripping protection.
The Oil pump electrical machinery control module; comprise the relay and the contactor that connect successively; be used to receive the order of cold oil temperature data acquisition and analysis module; send corresponding Oil pump electrical machinery and open/stop platform number and the time that order determines to start oil pump; receive the order of oil pump digital sampling and processing when also being used for oil pump overload, phase shortage or short circuit being arranged; carry out corresponding Oil pump electrical machinery and stop order, carry out trip protection.
The blower motor current data receives and processing module, comprise blower motor current data received current mutual inductor, blower motor current data isolated amplifier and the blower motor current data analog to digital converter of connecting that connect successively with blower motor, be used to gather current signal, and current signal be converted to digital signal through blower motor current data isolated amplifier and blower motor current data analog to digital converter by blower motor; Also comprise the switching value input circuit that connects successively, be used to gather the switching value signal of blower motor, isolate being converted to digital signal by photoelectricity.The current signal that collection of blower fan current data and processing module the are gathered blower motor in real time line data analysis of going forward side by side, analysis result is transferred to the blower fan control module.Analysis result comprises whether blower fan has overload, phase shortage or short circuit, if overload, phase shortage or short circuit are arranged, send corresponding order to the blower fan control module, carry out corresponding blower motor by the blower fan control module again and stop order, carry out trip protection, and its protection tripping operation information uploading is registered in cold oil temperature data acquisition and analysis module; Send corresponding order by temperature data acquisition and analysis module to the oil pump control module, stop order by execution of oil pump control module and the Oil pump electrical machinery that the tripping operation blower fan belongs to same cooling group again, carry out the delay tripping protection.
The blower motor control module; comprise the relay and the contactor that connect successively; be used to receive the order of cold oil temperature data acquisition and analysis module; send corresponding blower motor and open/stop blower fan platform number and the time that startup is determined in order; receive the order of blower fan digital sampling and processing when also being used for blower fan overload, phase shortage or short circuit being arranged; carry out corresponding blower motor and stop order, carry out trip protection.
Cooler package is symmetrically distributed around transformer, and when starting or stoping a cooler package, also another cooler package to symmetry says the word simultaneously, helps reducing vibration and noise.
Control box is mounted in control box on the transformer, be fixed on a kind of in ground around the transformer or the control box on the pillar.
This device onboard clock is for sampled data and incident are beaten markers.This onboard clock can pass through ntp server, divides pulse, pulse per second (PPS) to the time.
The method of this device Based Intelligent Control transformer cooling system as shown in Figure 1.Elder generation's control system powers on, finishes initiation parameter setting, control system self check, the phase shortage inspection of cooling system power source bus and the inspection of transformer load switch connection.If the control system self check has fault, fault flag is set, simultaneously alarm; If the inspection of cooling system power source bus phase shortage has fault, fault flag is set; If normal, just enter following steps successively:
1) detects transformer levels cold oil temperature and load current value;
2) the cooler package number of determining to start or stop, platform number, time
According to transformer levels cold oil temperature and rate of change and variation tendency, determine to start or stop the quantity of cooler package;
According to switching value signal, electric current and the voltage of oil pump in the cooler package and blower fan, determine to start or stop the platform number of cooler package;
According to transformer capacity, load, cold oil temperature scope, cold oil temperature rate of change, refrigeratory operate power and operation test parameter: oily flow velocity, cooler package fault state, determine the cooler package opening time;
3) start or stop a table oil pump
According to the accumulated running time of every cooler package, select the shortest oil pump input of accumulated running time according to balanced using priciple;
When starting oil pump, simultaneously its malfunction is judged that if fault is arranged, just substitute with normally functioning emergency bearing oil pump, the replacement of fault oil pump and cold oil temperature are irrelevant.Because the thermal capacity of transformer is big, the cold oil temperature surpasses upper limit critical value in case rise, be difficult to be cooled off fast, can work the mischief, can make control system not need just to start when the transformer temperature rises to upper limit critical value by the time new oil pump and in time replace the fault oil pump to transformer;
When starting oil pump, simultaneously its malfunction is judged, if fault is arranged, before substituting with normally functioning emergency bearing oil pump, send trip signal by the oil pump control module, fault flag is set, list not Work List in, before maintenance, no longer attempt to enable, alarm by user interface simultaneously;
When starting or stoping at least one table oil pump, be to start or stop successively in 3 minutes at least at interval in twos according to the equalization of pressure principle;
4) delayed startup or stop a typhoon machine
Starting oil pump when the cold oil flow velocity reaches setting value, according to the accumulated running time of every cooler package, select the shortest blower fan input of accumulated running time according to balanced using priciple, make and pressure and the cold oil temperature even variation that heating radiator is interior be beneficial to improve cooler package and transformer's life span;
When starting blower fan, simultaneously its malfunction is judged that if fault is arranged, just substitute with normally functioning standby fan, the replacement of fault blower fan and cold oil temperature are irrelevant.Because the thermal capacity of transformer is big, the cold oil temperature surpasses upper limit critical value in case rise, be difficult to be cooled off fast, can work the mischief, can make control system not need just to start when the transformer temperature rises to critical value by the time new blower fan and in time replace the fault blower fan to transformer;
When starting blower fan, simultaneously its malfunction is judged, if fault is arranged, before substituting with normally functioning standby fan, send trip signal by the blower fan control module, fault flag is set, list not Work List in, before maintenance, no longer attempt to enable, alarm by user interface simultaneously;
When starting or stoping at least one typhoon machine, be just to start or stop in 3 minutes at least at interval in twos;
5) all oil pumps and blower fan current detecting
Cooler package start or stop with operational process in, whether the function that detects two cooler package in real time is normal, gather the interior oil pump of two cooler package and switching value signal, electric current and the voltage of blower fan in real time, carry out real-time analysis, comprehensively judge the function of cooler package;
Detection is, Oil pump electrical machinery phase shortage undesired to operating oil pump flow velocity, overload, short circuit and provides emergency protection to operating blower motor phase shortage, overload, short circuit; break down if judge; fault flag is set; send trip signal by oil pump control module or blower fan control module, alarm by user interface simultaneously.To guarantee the cooling control system operate as normal, prevent that the transformer cooling oil temperature from spending height;
Detect still to operating oil pump and to the power supply of operating blower fan the dual power supply open-phase protection is provided,, just disconnect current power supply, automatically switch to another standby power supply if judge and break down;
6) access to plant debugging mode
By telecommunication or local user interface access to plant debugging mode, detect electric current, voltage and the switching value of each cooling group successively, analyze it and whether be in normal condition, if a certain cooling group fault, it will be put into the fault Groups List, before the maintenance restore funcitons not tested and start, device is after finishing debugging, produce examining report, after the device debugging state finishes, switch to running status;
After device powers on, enter init state, finish the initialization self check at this state, as check supply voltage, key hardware components and parts, software verification and.Enter running status after initialization is finished, running status comprises two branch states: duty and debugging mode, duty comprise two sub-states: auto state and manual state;
In working order down, cooling control system normally moves, and opens/stops the cooling group automatically according to temperature, load, or manually open/stop the cooling group, its objective is to guarantee that transformer works under normal temperature.Device is in this state in the most of the time.If catastrophic failure takes place device, in the time of can not normally controlling the cooling group, device enters malfunction, and sends alarm signal and transformer load trip signal;
Under debugging mode, the gentle load of the start and stop of each cooling group and transformer oil is irrelevant.Device detects electric current, voltage and the switching value of each cooling group successively, analyzes it and whether is in normal condition.If a certain cooling group fault, it will be put into the fault Groups List, before the maintenance restore funcitons not tested and start.Device produces examining report after finishing debugging.After debugging mode finishes, artificial or automatically switch to running status;
7) logout
In Event Log Table, and permanent the preservation is so that the reviewing and correcting of problem to the main operation, mistake and the failure logging that take place in device initialization and the operational process for each correlation module.The content of incident comprises user's important operation, as the parameter setting or think and start/stop the cooling group; Sensor fault, control outputting communication interrupt or unusual, the hardware and software failure of device or unusual own;
According to the incident order of severity, described logout is divided into information, unusual and alarm.Information is the record of user's normal running; Unusually comprise the operation exception that device exists not to be influenced major function or needn't alert users to get involved processing immediately, and the debugging that device exists catastrophic failure also needn't alarm in the field adjustable process is unusual; Alarm is that device exists the catastrophic failure lead to grave consequences must alert users to get involved the operation exception of processing immediately;
Recorded content comprises main operation, mistake and the fault of each correlation module to taking place in device initialization and the operational process, artificial switching and systematic parameter configuration as sensor or input fault, blower fan or oil pump control outputting communication fault, blower fan or Oil pump electrical machinery overload, phase shortage or short circuit, device initialization self check or operation self check mistake, system state, described logout writes same logout file and forever preserves, so that review and correct.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make some alternative or obvious modification that are equal to without departing from the inventive concept of the premise; and performance or purposes are identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (10)
1. transformer cooling system intelligence control method is characterized in that:
Following steps are arranged successively:
1) detects transformer levels cold oil temperature and load current value;
2) the cooler package number of determining to start or stop, platform number, time
According to transformer levels cold oil temperature and rate of change and variation tendency, determine to start or stop the quantity of cooler package;
According to switching value signal, electric current and the voltage of oil pump in the cooler package and blower fan, determine to start or stop the platform number of cooler package;
According to transformer capacity, load, cold oil temperature scope, cold oil temperature rate of change, refrigeratory operate power and operation test parameter: oily flow velocity, cooler package fault state, determine the cooler package opening time;
3) start or stop at least one table oil pump
According to the accumulated running time of every cooler package, select the shortest oil pump input of accumulated running time according to balanced using priciple;
4) delayed startup or stop at least one typhoon machine
Starting oil pump when the cold oil flow velocity reaches setting value, according to the accumulated running time of every cooler package, select the shortest blower fan input of accumulated running time according to balanced using priciple, make pressure and cold oil temperature even variation in the heating radiator;
5) all oil pumps and blower fan current detecting
Cooler package start or stop with operational process in, whether the function that detects each cooler package in real time is normal, gather the interior oil pump of each cooler package and switching value signal, electric current and the voltage of blower fan in real time, carry out real-time analysis, comprehensively judge the function of cooler package;
6) access to plant debugging mode
By telecommunication or local user interface access to plant debugging mode, detect electric current, voltage and the switching value of each cooling group successively, analyze it and whether be in normal condition, if a certain cooling group fault, it will be put into the fault Groups List, before the maintenance restore funcitons not tested and start, device is after finishing debugging, produce examining report, after the device debugging state finishes, switch to running status;
7) logout
According to the incident order of severity, described logout is divided into information, unusual and alarm, recorded content comprises main operation, mistake and the fault of each correlation module to taking place in device initialization and the operational process, and described logout writes same logout file and forever preserves.
2. transformer cooling system intelligence control method as claimed in claim 1 is characterized in that:
Described step 3) is when starting oil pump, simultaneously its malfunction is judged, if fault is arranged, send trip signal by the oil pump control module, fault flag is set, list not Work List in, before maintenance, no longer attempt to enable, by the user interface alarm, substitute with normally functioning emergency bearing oil pump more simultaneously, the replacement of fault oil pump and cold oil temperature are irrelevant;
Described step 3) is to start or stop successively in 3 minutes at least at interval in twos according to the equalization of pressure principle when starting or stoping at least one table oil pump.
3. transformer cooling system intelligence control method as claimed in claim 1 or 2 is characterized in that:
Described step 4) is when starting blower fan, simultaneously its malfunction is judged, if fault is arranged, send trip signal by the blower fan control module, fault flag is set, list not Work List in, before maintenance, no longer attempt to enable, by the user interface alarm, substitute with normally functioning standby fan more simultaneously, the replacement of fault blower fan and cold oil temperature are irrelevant;
Described step 4) is just to start or stop in 3 minutes at least at interval in twos when starting or stoping at least one typhoon machine.
4. transformer cooling system intelligence control method as claimed in claim 3 is characterized in that:
Described step 5) detects to be, Oil pump electrical machinery overload undesired to operating oil pump flow velocity, phase shortage, short circuit and to provide emergency protection to operating blower motor overload, phase shortage, short circuit, break down if judge, fault flag is set, send trip signal by oil pump control module or blower fan control module, alarm by user interface simultaneously;
It is to provide the dual power supply open-phase protection to operating oil pump and to the power supply of operating blower fan that described step 5) detects, if judge and break down, just disconnects current power supply, automatically switches to another standby power supply.
5. transformer cooling system intelligence control method as claimed in claim 4 is characterized in that:
Before described step 1), comprise that control system powers on, finishes initiation parameter setting, control system self check, the phase shortage inspection of cooling system power source bus and the inspection of transformer load switch connection;
If the control system self check has fault, fault flag is set, simultaneously alarm;
If the inspection of cooling system power source bus phase shortage has fault, fault flag is set.
6. transformer cooling system intelligence controlling device, comprise control box and be arranged on the interior intelligence control circuit of described control box, be used for control at least two group transformer cooler groups, described cooler package comprises heating radiator, oil pump and blower fan, described oil pump drives the cold oil circulation of described heating radiator inside, described blower fan is installed in described heating radiator appearance to its surface blowing heat radiation, is monitored in real time by intelligence control circuit by the electric current of blower fan and Oil pump electrical machinery, it is characterized in that:
Comprise DSP and ARM double-core hardware platform, be provided with dsp board and ARM plate, described dsp board and described ARM plate are implemented configuration, are monitored at local and far-end by the hardware bus communication, and according to the unified standard networking of intelligent grid;
Described dsp board comprises cold oil temperature data acquisition and analysis module, the Oil pump electrical machinery current data is gathered and processing module, the Oil pump electrical machinery control module, collection of blower motor current data and processing module and blower motor control module, described Oil pump electrical machinery control module is connected with Oil pump electrical machinery, and respectively with described cold oil temperature data acquisition and analysis module, the collection of Oil pump electrical machinery current data is connected with processing module, described blower motor control module is connected with blower motor, and respectively with described cold oil temperature data acquisition and analysis module, the collection of blower motor current data is connected with processing module, described dsp board carry out data acquisition comprise to the time, analyze, control output, alarm output and to the time function, event information and related data are sent to the ARM plate;
Described ARM plate comprises user interface, communication module and data memory module, described communication module and described cold oil temperature data acquisition and analysis module are by the hardware bus communication, described ARM plate is finished interface display, telecommunication and data storage function, by the user by long-range or local interface control system, data query and modification parameter.
7. transformer cooling system intelligence controlling device as claimed in claim 6 is characterized in that:
Described cold oil temperature data acquisition and analysis module, comprise cold oil temperature sensor and data processing and analysis module, be used to detect transformer levels cold oil temperature and load current value, and according to load current value and rising or decline, rise and fall in conjunction with transformer cold oil temperature, need to determine the cooling group quantity and the time of startup, and malfunction and the working time of putting down in writing all blower fans and oil pump, to judge the cooler package number that specifically starts or stops, platform number, time, and send corresponding order to oil pump control module and blower fan control module, send Oil pump electrical machinery respectively by oil pump control module and blower fan control module again and blower motor opens/stop order, the order that described cold oil temperature data acquisition and analysis module are sent, the malfunction of each cooling group, the work cumulative time all writes historical record.
8. as claim 6 or 7 described transformer cooling system intelligence controlling devices, it is characterized in that:
Described Oil pump electrical machinery current data is gathered and processing module, comprise the Oil pump electrical machinery current data of the connecting collection current transformer, Oil pump electrical machinery current data isolated amplifier and the Oil pump electrical machinery current data analog to digital converter that connect successively with Oil pump electrical machinery, be used to gather current signal, and current signal be converted to digital signal through Oil pump electrical machinery current data isolated amplifier and Oil pump electrical machinery current data analog to digital converter by Oil pump electrical machinery; Also comprise the switching value input circuit that connects successively, be used to gather the switching value signal of Oil pump electrical machinery, be converted to digital signal by the photoelectricity isolation, the current signal that collection of described Oil pump electrical machinery current data and processing module the are gathered Oil pump electrical machinery in real time line data analysis of going forward side by side, analysis result is transferred to the oil pump control module, described analysis result comprises whether oil pump has overload, phase shortage or short circuit, if overload is arranged, phase shortage or short circuit, send corresponding order to the oil pump control module, carry out corresponding Oil pump electrical machinery by the oil pump control module again and stop order, carry out trip protection, and its protection tripping operation information uploading is registered in described cold oil temperature data acquisition and analysis module; Send corresponding order by temperature data acquisition and analysis module to the blower fan control module, stop order by execution of blower fan control module and the blower motor that the tripping operation oil pump belongs to same cooling group again, carry out the delay tripping protection;
Described Oil pump electrical machinery control module; comprise the relay and the contactor that connect successively; be used to receive the order of cold oil temperature data acquisition and analysis module; send corresponding Oil pump electrical machinery and open/stop platform number and the time that order determines to start oil pump; receive the order of oil pump digital sampling and processing when also being used for oil pump overload, phase shortage or short circuit being arranged; carry out corresponding Oil pump electrical machinery and stop order, carry out trip protection.
9. transformer cooling system intelligence controlling device as claimed in claim 8 is characterized in that:
Described blower motor current data receives and processing module, comprise blower motor current data received current mutual inductor, blower motor current data isolated amplifier and the blower motor current data analog to digital converter of connecting that connect successively with blower motor, be used to gather current signal, and current signal be converted to digital signal through blower motor current data isolated amplifier and blower motor current data analog to digital converter by blower motor; Also comprise the switching value input circuit that connects successively, be used to gather the switching value signal of blower motor, be converted to digital signal by the photoelectricity isolation, the current signal that collection of described blower fan current data and processing module the are gathered blower motor in real time line data analysis of going forward side by side, analysis result is transferred to the blower fan control module.Described analysis result comprises whether blower fan has overload, phase shortage or short circuit, if overload, phase shortage or short circuit are arranged, send corresponding order to the blower fan control module, carry out corresponding blower motor by the blower fan control module again and stop order, carry out trip protection, and its protection tripping operation information uploading is registered in described cold oil temperature data acquisition and analysis module; Send corresponding order by temperature data acquisition and analysis module to the oil pump control module, stop order by execution of oil pump control module and the Oil pump electrical machinery that the tripping operation blower fan belongs to same cooling group again, carry out the delay tripping protection;
Described blower motor control module; comprise the relay and the contactor that connect successively; be used to receive the order of cold oil temperature data acquisition and analysis module; send corresponding blower motor and open/stop blower fan platform number and the time that startup is determined in order; receive the order of blower fan digital sampling and processing when also being used for blower fan overload, phase shortage or short circuit being arranged; carry out corresponding blower motor and stop order, carry out trip protection.
10. transformer cooling system intelligence controlling device as claimed in claim 9 is characterized in that:
Described cooler package is symmetrically distributed around transformer, and when starting or stoping a cooler package, also another cooler package to symmetry says the word simultaneously;
Described control box is mounted in control box on the transformer, be fixed on a kind of in ground around the transformer or the control box on the pillar.
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| CN2010102513441A CN101943921B (en) | 2010-08-10 | 2010-08-10 | Intelligent control method and intelligent control device of transformer cooling system |
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| CN2010102513441A CN101943921B (en) | 2010-08-10 | 2010-08-10 | Intelligent control method and intelligent control device of transformer cooling system |
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