CN105021989B - Circulation loss test system and the measuring method realized using the system between generator stator bar strand - Google Patents
Circulation loss test system and the measuring method realized using the system between generator stator bar strand Download PDFInfo
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- CN105021989B CN105021989B CN201510427997.3A CN201510427997A CN105021989B CN 105021989 B CN105021989 B CN 105021989B CN 201510427997 A CN201510427997 A CN 201510427997A CN 105021989 B CN105021989 B CN 105021989B
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Abstract
Circulation loss test system and the measuring method realized using the system, belong to stator winding conductor bars in electrical machines detection field between generator stator bar strand.Solving the problems, such as can not direct measurement for stator bar circulation loss in existing loss of electric machine measuring technology.It includes power supply platform, protection device, test platform and change of current detection platform; test platform includes bar connection terminal and multi-slot stator is unshakable in one's determination; the described multi-slot stator block unshakable in one's determination that multiple grooves are provided with for upper surface; and the number of groove is more than or equal to 5; the length of groove is equal to multi-slot stator length unshakable in one's determination; every group of stator bar is individually positioned in mutual non-conterminous groove; and two stator bars in each groove are arranged up and down, mutually insulated between two stator bars in each groove and between stator bar and multi-slot stator iron core.It is mainly for detection of circulation loss between stator bar strand.
Description
Technical field
The invention belongs to stator winding conductor bars in electrical machines detection field.
Background technology
Generator capacity increases increasingly, how to improve generator efficiency, and the running wastage for reducing generator is current electricity
The study hotspot in machine field.The stator bar of large-scale alternating current generator is in order to reduce vortex, typically by many strands and around end
It is formed by connecting by simultaneously headgear.Operationally, due to each strand of stator bar, location is different in magnetic field, can shape between strand
Into electrical potential difference so as to cause to produce circulation between strand, increase stator bar AC resistance, not only increase generator and running
When added losses, reduce the operational efficiency of generator, and cause the temperature difference increase between different strands, influence generator
Safe and stable operation.
Circulation loss during in order to reduce generator operation, when carrying out generator design, usually adopted according to actual conditions
Circulation and its added losses are reduced with the mode for carrying out replacing in groove or end to generator stator bar, and design of electrical motor people
Member is carrying out being only capable of the transposition side by special design or analysis software to generator stator bar during generator design at present
Case is emulated to verify its feasibility, finally can only analyze it by carrying out unloaded and load test to the complete machine of design
Loss situation.
Current test system for generator and method of testing is concentrated mainly on the electrical parameter to motor, temperature rise, moment of torsion, vibration
In direct or indirect test and calculating etc. parameter, and the test system and method for the loss of electric machine are often through whole to motor
Machine carries out measuring and calculation and obtained, and the loss for obtaining motor is machine loss, then is lost by the way that each several part is calculated, so
Not only effectively the design of stator bar can not clearly be evaluated, while greatly waste manpower and materials again.
Therefore the research hardly possible that a kind of pilot system for the circulation loss for being capable of Validity Test stator bar is still loss of electric machine test is studied
One of point.
The content of the invention
The present invention is to solve directly survey for stator bar circulation loss in existing loss of electric machine measuring technology
The problem of amount, realized the invention provides circulation loss test system between a kind of generator stator bar strand and using the system
Measuring method.
Circulation loss test system between generator stator bar strand, the test system are used for 3 groups of stator bars of test
Circulation loss, every group includes two stator bars, and test system includes power supply platform, protection device, test platform and circulation inspection
Survey platform,
Power supply platform includes exchange regulated power supply and transformer, and described exchange regulated power supply is used to be supplied to transformer
Electricity, protection device are pasted onto on an end of any one stator bar, and protection device is used to control exchange regulated power supply
Break-make,
Test platform includes bar connection terminal and multi-slot stator is unshakable in one's determination, and described multi-slot stator iron core is provided with for upper surface
The block of multiple grooves, and the number of groove is more than or equal to 5, the length of groove is equal to multi-slot stator length unshakable in one's determination,
Every group of stator bar is individually positioned in mutual non-conterminous groove, and on two stator bars in each groove
Lower arrangement, mutually insulated between two stator bars in each groove and between stator bar and multi-slot stator iron core,
Circulation detection platform includes Hall type current transformer, voltage sample folder, voltage transformer, acquisition module and upper
Machine,
The both ends of all stator bars are fixedly connected with bar connection terminal, and bar connection terminal is pressed from both sides by voltage sample
It is connected with voltage transformer, voltage transformer is used to gathering the anode-cathode voltage signals of all stator bars, and by the signal of collection
Deliver to acquisition module,
Hall type current transformer is used to gather the strand electric current inside all stator bars, and the electric current of collection is sent
To acquisition module,
Acquisition module is used to the voltage signal of reception and current signal delivering to host computer.
Circulation loss test system between generator stator bar strand, the test system are used for 3 groups of stator bars of test
Circulation loss, and every group includes two stator bars, test system includes power supply platform, protection device, test platform and circulation
Detection platform,
Power supply platform includes exchange regulated power supply and transformer, and described exchange regulated power supply is used to be supplied to transformer
Electricity, protection device are pasted onto on an end of any one stator bar, and protection device is used to control exchange regulated power supply
Break-make,
Test platform includes bar connection terminal and multi-slot stator is unshakable in one's determination, and described multi-slot stator iron core is provided with for upper surface
The block of multiple grooves, and the number of groove is more than or equal to 3, the length of groove is equal to multi-slot stator length unshakable in one's determination,
3 groups of stator bars are individually positioned in adjacent groove, and two stator bars in each groove are arranged up and down,
Mutually insulated between two stator bars in each groove and between stator bar and multi-slot stator iron core,
Circulation detection platform includes Hall type current transformer, voltage sample folder, voltage transformer, acquisition module and upper
Machine,
The both ends of all stator bars are fixedly connected with bar connection terminal, and bar connection terminal is pressed from both sides by voltage sample
It is connected with voltage transformer, voltage transformer is used to gathering the anode-cathode voltage signals of all stator bars, and by the signal of collection
Deliver to acquisition module,
Hall type current transformer is used to gather the strand electric current inside all stator bars, and the electric current of collection is sent
To acquisition module,
Acquisition module is used to the voltage signal of reception and current signal delivering to host computer.
Circulation loss test system between generator stator bar strand, the test system are used for 1 group of stator bar of test
Circulation loss, and the group includes two stator bars, test system includes power supply platform, protection device, test platform and circulation
Detection platform,
Power supply platform includes exchange regulated power supply and transformer, and described exchange regulated power supply is used to carry out to protection device
Power supply, protection device are pasted onto on an end of any one stator bar, and protection device is used to control exchange regulated power supply
Break-make,
Test platform includes bar connection terminal and multi-slot stator is unshakable in one's determination, and described multi-slot stator iron core is provided with for upper surface
The block of multiple grooves, the length of groove are equal to multi-slot stator length unshakable in one's determination,
One group of stator bar is placed in groove, and two in the groove stator bar is arranged up and down, and two in groove
Mutually insulated between individual stator bar and between stator bar and multi-slot stator iron core,
Circulation detection platform includes Hall type current transformer, voltage sample folder, voltage transformer, acquisition module and upper
Machine,
The both ends of all stator bars are fixedly connected with bar connection terminal, and bar connection terminal is pressed from both sides by voltage sample
It is connected with voltage transformer, voltage transformer is used to gathering the anode-cathode voltage signals of all stator bars, and by the signal of collection
Deliver to acquisition module,
Hall type current transformer is used to gather the strand electric current inside all stator bars, and the electric current of collection is sent
To acquisition module,
Acquisition module is used to the voltage signal of reception and electric current delivering to host computer.
The method of testing realized using circulation loss test system between described generator stator bar strand, its feature are existed
In the detailed process of this method is：
Step 1：It is 5V, output frequency 50Hz in the output voltage of transformer, under conditions of total harmonic distortion factor is 0,
Pass through adjust exchange regulated power supply so that transformer export respectively 100A, 200A, 300A, 400A, 500A, 600A, 700A,
800A, 900A and 1000A totally 10 groups of data, produce circulation in stator bar between strand, acquisition module by voltage transformer and
Hall type current transformer gathers the voltage of all stator bars, current signal in real time, and sends to host computer and store；
Step 2：It is 100A in the output current of transformer, output frequency 50Hz, total harmonic distortion factor is 0 condition
Under, exchange regulated power supply by adjusting so that transformer exports 5V, 10V, 15V, 20V, 25V, 30V, 35V, 40V, 45V respectively
With 50V totally 10 groups of data, circulation is produced between strand in stator bar, acquisition module is mutual by voltage transformer and Hall type electric current
Sensor gathers the voltage of all stator bars, current signal in real time, and sends to host computer and store；
Step 3：It is 5V, output current 100A in the output voltage of transformer, under conditions of total harmonic distortion factor is 0,
Pass through adjust exchange regulated power supply so that transformer difference output frequency be 10Hz, 20Hz, 30Hz, 40Hz, 50Hz, 60Hz,
70Hz, 80Hz, 90Hz and 100Hz totally 10 groups of data, circulation are produced between strand in stator bar, acquisition module passes through mutual induction of voltage
Device and Hall type current transformer gather the voltage of all stator bars, current signal in real time, and send to host computer and store；
Step 4：It is 5V, output frequency 50Hz in the output voltage of transformer, under conditions of output current is 100A,
Pass through and adjust exchange regulated power supply so that transformer export respectively total harmonic distortion factor for 1%, 2%, 3%, 4%, 5%, 6%,
7%th, 8%, 9% and 10% totally 10 groups of data, produce circulation in stator bar between strand, acquisition module by voltage transformer and
Hall type current transformer gathers the voltage of all stator bars, current signal in real time, and sends to host computer and store；Step
Five：Host computer carries out circulation loss calculating to 40 groups of test datas of reception, obtains measurement result.
Beneficial effects of the present invention：
(1) circulation of stator bar is directly tested by pilot system of the present invention, and then calculates its ring
Stream loss, the accuracy of circulation loss test is improved, is had for the quality of evaluation stator bar design and manufacturing process
Important directive significance.
(2) model machine need not be made relative to conventional motors test system, pilot system of the present invention, can be in motor
Design initial stage, the circulation loss of the stator bar of generator is tested, the test period of circulation loss is shortened, reduces
Unnecessary cost.
(3) pilot system of pilot system and method for the present invention is easily achieved and test method is flexible, and is led to
Cross and reliable experiment number is provided for the research and design for instructing positioning line rod transposition mode to the comprehensive analysis of test result
According to.
Brief description of the drawings
Fig. 1 and Fig. 2 is that the principle of circulation loss test system between generator stator bar strand of the present invention is shown
It is intended to；
Fig. 3 is the multi-slot stator relative position relation schematic diagram unshakable in one's determination with stator bar described in embodiment one；
Fig. 4 is the multi-slot stator relative position relation schematic diagram unshakable in one's determination with stator bar described in embodiment three；
Fig. 5 is the multi-slot stator relative position relation schematic diagram unshakable in one's determination with stator bar described in embodiment five；
Fig. 6 is the inside principle schematic of acquisition module；
Fig. 7 is being realized using circulation loss test system between generator stator bar strand described in embodiment seven
Method of testing flow chart.
Embodiment
Embodiment one：Illustrate present embodiment, the generator unit stator described in present embodiment referring to Fig. 1 to Fig. 3
Circulation loss test system between bar strand, the test system are used for the circulation loss for testing 3 groups of stator bars 5, and every group includes
Two stator bars 5, test system include power supply platform 1, protection device 2, test platform 3 and circulation detection platform 4,
Power supply platform 1 includes exchange regulated power supply 1-1 and transformer 1-2, described exchange regulated power supply 1-1 for change
Depressor 1-2 is powered, and protection device 2 is pasted onto on an end of any one stator bar 5, and protection device 2 is used to control
System exchange regulated power supply 1-1 break-make,
Test platform 3 includes bar connection terminal 3-2 and multi-slot stator iron core 3-1, described multi-slot stator iron core 3-1 are
Upper surface is provided with the block of multiple grooves, and the number of groove is more than or equal to 5, and the length of groove is equal to multi-slot stator iron core
3-1 length,
Every group of stator bar 5 is individually positioned in mutual non-conterminous groove, and two stator bars 5 in each groove
Arrange, mutually insulated between two stator bars 5 in each groove and between stator bar 5 and multi-slot stator iron core 3-1 up and down,
Circulation detection platform 4 includes Hall type current transformer 4-1, voltage sample folder 4-2, voltage transformer 4-3, collection
Module 4-4 and host computer 4-5,
The both ends of all stator bars 5 are fixedly connected with bar connection terminal 3-2, and bar connection terminal 3-2 passes through electricity
Pressure sampling folder 4-2 is connected with voltage transformer 4-3, and voltage transformer 4-3 is used for the terminal voltage letter for gathering all stator bars 5
Number, and the signal of collection is delivered into acquisition module 4-4,
Hall type current transformer 4-1 is used to gathering strand electric current inside all stator bars 5, and by the electricity of collection
Stream to acquisition module 4-4,
Acquisition module 4-4 is used to the voltage signal of reception and current signal delivering to host computer 4-5.
In present embodiment, described acquisition module 4-4 inside principle schematic is referring specifically to Fig. 6.
Described acquisition module 4-4 includes analog input interface 4-41, operational amplifier 4-42, high-speed, multi-path A/D
Chip 4-43, CPLD chip 4-44, USB interface 4-47, D/A chip 4-45 and analog signal output interface 4-46；
Voltage signal inputs and current signal input of the analog input interface 4-41 as acquisition module 4-4,
Analog input interface 4-41 data signal output is connected with operational amplifier 4-42 data signal input, computing
Amplifier 4-42 data signal output is connected with high-speed, multi-path A/D chips 4-43 data signal input, high-speed, multi-path
A/D chips 4-43 data signal output is connected with D/A chips 4-45 data signal input, D/A chips 4-45 mould
Intend signal output part to be connected with analog signal output interface 4-46 analog signal output,
Data signal output of the analog signal output interface 4-46 analog signal output as acquisition module 4-4,
USB interface 4-47 is connected with CPLD chip 4-44 serial communication ports.
Embodiment two：Ring between generator stator bar strand described in present embodiment and embodiment one
The difference of stream loss test system is that protection device 2 is thermal switch device.
Embodiment three：Illustrate present embodiment, the generator unit stator described in present embodiment referring to Fig. 1,2 and 4
Circulation loss test system between bar strand, the test system are used for the circulation loss for testing 3 groups of stator bars 5, and every group of bag
Two stator bars 5 are included, test system includes power supply platform 1, protection device 2, test platform 3 and circulation detection platform 4,
Power supply platform 1 includes exchange regulated power supply 1-1 and transformer 1-2, described exchange regulated power supply 1-1 for change
Depressor 1-2 is powered, and protection device 2 is pasted onto on an end of any one stator bar 5, and protection device 2 is used to control
System exchange regulated power supply 1-1 break-make,
Test platform 3 includes bar connection terminal 3-2 and multi-slot stator iron core 3-1, described multi-slot stator iron core 3-1 are
Upper surface is provided with the block of multiple grooves, and the number of groove is more than or equal to 3, and the length of groove is equal to multi-slot stator iron core
3-1 length,
3 groups of stator bars 5 are individually positioned in adjacent groove, and two stator bars in each groove are arranged about 5
Cloth, mutually insulated between two stator bars 5 in each groove and between stator bar 5 and multi-slot stator iron core 3-1,
Circulation detection platform 4 includes Hall type current transformer 4-1, voltage sample folder 4-2, voltage transformer 4-3, collection
Module 4-4 and host computer 4-5,
The both ends of all stator bars 5 are fixedly connected with bar connection terminal 3-2, and bar connection terminal 3-2 passes through electricity
Pressure sampling folder 4-2 is connected with voltage transformer 4-3, and voltage transformer 4-3 is used for the terminal voltage letter for gathering all stator bars 5
Number, and the signal of collection is delivered into acquisition module 4-4,
Hall type current transformer 4-1 is used to gathering strand electric current inside all stator bars 5, and by the electricity of collection
Stream to acquisition module 4-4,
Acquisition module 4-4 is used to the voltage signal of reception and current signal delivering to host computer 4-5.
Embodiment four：Ring between generator stator bar strand described in present embodiment and embodiment three
The difference of stream loss test system is that protection device 2 is thermal switch device.
Embodiment five：Illustrate present embodiment, the generator unit stator described in present embodiment referring to Fig. 1,2 and 5
Circulation loss test system between bar strand, the test system are used for the circulation loss for testing 1 group of stator bar 5, and the group bag
Two stator bars 5 are included, test system includes power supply platform 1, protection device 2, test platform 3 and circulation detection platform 4,
Power supply platform 1 includes exchange regulated power supply 1-1 and transformer 1-2, described exchange regulated power supply 1-1 for change
Depressor 1-2 is powered, and protection device 2 is pasted onto on an end of any one stator bar 5, and protection device 2 is used to control
System exchange regulated power supply 1-1 break-make,
Test platform 3 includes bar connection terminal 3-2 and multi-slot stator iron core 3-1, described multi-slot stator iron core 3-1 are
Upper surface is provided with the block of multiple grooves, and the length of groove is equal to multi-slot stator iron core 3-1 length,
One group of stator bar 5 is placed in groove, and two in the groove stator bar is arranged about 5, in groove
Mutually insulated between two stator bars 5 and between stator bar 5 and multi-slot stator iron core 3-1,
Circulation detection platform 4 includes Hall type current transformer 4-1, voltage sample folder 4-2, voltage transformer 4-3, collection
Module 4-4 and host computer 4-5,
The both ends of all stator bars 5 are fixedly connected with bar connection terminal 3-2, and bar connection terminal 3-2 passes through electricity
Pressure sampling folder 4-2 is connected with voltage transformer 4-3, and voltage transformer 4-3 is used for the terminal voltage letter for gathering all stator bars 5
Number, and the signal of collection is delivered into acquisition module 4-4,
Hall type current transformer 4-1 is used to gathering strand electric current inside all stator bars 5, and by the electricity of collection
Stream to acquisition module 4-4,
Acquisition module 4-4 is used to the voltage signal of reception and current signal delivering to host computer 4-5.
Embodiment six：Ring between generator stator bar strand described in present embodiment and embodiment five
The difference of stream loss test system is that protection device 2 is thermal switch device.
Embodiment seven：Illustrate present embodiment referring to Fig. 1,2 and 7, using the institute of embodiment one, three or five
The method of testing that circulation loss test system is realized between the generator stator bar strand stated, the detailed process of this method are：
Step 1：It is 5V in transformer 1-2 output voltage, output frequency 50Hz, total harmonic distortion factor is 0 condition
Step 1：It is 5V in transformer 1-2 output voltage, output frequency 50Hz, under conditions of total harmonic distortion factor is 0, passes through
Adjustment exchange regulated power supply 1-1 so that transformer 1-2 export respectively 100A, 200A, 300A, 400A, 500A, 600A, 700A,
800A, 900A and 1000A totally 10 groups of data, circulation are produced between strand in stator bar 5, acquisition module 4-4 passes through mutual induction of voltage
Device 4-3 and Hall type current transformer 4-1 gathers voltage, the current signal of all stator bars 5 in real time, and sends to upper
Machine 4-5 is stored；
Step 2：It is 100A in transformer 1-2 output current, output frequency 50Hz, total harmonic distortion factor is 0 bar
Under part, pass through and adjust exchange regulated power supply 1-1 so that transformer 1-2 export respectively 5V, 10V, 15V, 20V, 25V, 30V, 35V,
40V, 45V and 50V totally 10 groups of data, circulation are produced between strand in stator bar 5, acquisition module 4-4 passes through voltage transformer 4-3
Gather voltage, the current signal of all stator bars 5 in real time with Hall type current transformer 4-1, and send to host computer 4-5
Storage；
Step 3：It is 5V in transformer 1-2 output voltage, output current 100A, total harmonic distortion factor is 0 condition
Under, pass through and adjust exchange regulated power supply 1-1 so that transformer 1-2 difference output frequencies are 10Hz, 20Hz, 30Hz, 40Hz,
50Hz, 60Hz, 70Hz, 80Hz, 90Hz and 100Hz totally 10 groups of data, circulation, acquisition module are produced between strand in stator bar 5
4-4 gathers the voltage of all stator bars 5 in real time by voltage transformer 4-3 and Hall type current transformer 4-1, electric current is believed
Number, and send to host computer 4-5 and store；
Step 4：It is 5V in transformer 1-2 output voltage, output frequency 50Hz, output current is 100A condition
Under, pass through and adjust exchange regulated power supply 1-1 so that transformer 1-2 export respectively total harmonic distortion factor for 1%, 2%, 3%,
4%th, 5%, 6%, 7%, 8%, 9% and 10% totally 10 groups of data, circulation, acquisition module 4-4 are produced between strand in stator bar 5
Gather voltage, the current signal of all stator bars 5 in real time by voltage transformer 4-3 and Hall type current transformer 4-1,
And send to host computer 4-5 and store；
Step 5：Host computer 4-5 carries out circulation loss calculating to 40 groups of test datas of reception, obtains measurement result.
In present embodiment, host computer 4-5 can press bar position to be measured, bar end to be measured Unclosing structure, to be measured respectively
Groove location carries out data analysis, Comprehensive Evaluation measurement result where the input power grade of bar and bar to be measured.
The calculating of stator bar circulation loss, stator bar impedometer can be carried out by storing test data in host computer 4-5
Calculate, the mean square error between each group of data and arithmetic error calculate, frequency analysis calculating.
Claims (7)
1. circulation loss test system between generator stator bar strand, the test system is used for 3 groups of stator bars (5) of test
Circulation loss, every group includes two stator bars (5), it is characterised in that test system includes power supply platform (1), protection device
(2), test platform (3) and circulation detection platform (4),
Power supply platform (1) includes exchange regulated power supply (1-1) and transformer (1-2), described exchange regulated power supply (1-1) are used for
It is powered to transformer (1-2), protection device (2) is pasted onto on an end of any one stator bar (5), protection dress
Put (2) be used for control exchange regulated power supply (1-1) break-make,
Test platform (3) includes bar connection terminal (3-2) and multi-slot stator is (3-1) unshakable in one's determination, described multi-slot stator iron core (3-
1) block of multiple grooves is provided with for upper surface, and the number of groove is more than or equal to 5, the length of each groove is equal to more
The length of groove stator core (3-1),
Every group of stator bar (5) is individually positioned in mutual non-conterminous groove, and two stator bars (5) in each groove
Arrangement up and down, between two stator bars (5) in each groove and between stator bar (5) and multi-slot stator (3-1) unshakable in one's determination homogeneously
Mutually insulation,
Circulation detection platform (4) include Hall type current transformer (4-1), voltage sample folder (4-2), voltage transformer (4-3),
Acquisition module (4-4) and host computer (4-5),
The both ends of all stator bars (5) are fixedly connected with bar connection terminal (3-2), and bar connection terminal (3-2) passes through
Voltage sample folder (4-2) is connected with voltage transformer (4-3), and voltage transformer (4-3) is used to gather all stator bars (5)
Anode-cathode voltage signal, and the signal of collection is delivered into acquisition module (4-4),
Hall type current transformer (4-1) is used to gathering the internal strand electric current of all stator bars (5), and by the electricity of collection
Stream to acquisition module (4-4),
Acquisition module (4-4) is used to the voltage signal of reception and current signal delivering to host computer (4-5).
2. circulation loss test system between generator stator bar strand according to claim 1, it is characterised in that protection
Device (2) is thermal switch device.
3. circulation loss test system between generator stator bar strand, the test system is used for 3 groups of stator bars (5) of test
Circulation loss, and every group includes two stator bars (5), it is characterised in that test system includes power supply platform (1), protection dress
(2), test platform (3) and circulation detection platform (4) are put,
Power supply platform (1) includes exchange regulated power supply (1-1) and transformer (1-2), described exchange regulated power supply (1-1) are used for
It is powered to transformer (1-2), protection device (2) is pasted onto on an end of any one stator bar (5), protection dress
Put (2) be used for control exchange regulated power supply (1-1) break-make,
Test platform (3) includes bar connection terminal (3-2) and multi-slot stator is (3-1) unshakable in one's determination, described multi-slot stator iron core (3-
1) block of multiple grooves is provided with for upper surface, and the number of groove is more than or equal to 3, the length of each groove is equal to more
The length of groove stator core (3-1),
3 groups of stator bars (5) are individually positioned in adjacent groove, and two stator bars (5) in each groove are arranged up and down
Cloth, mutually insulated between two stator bars (5) in each groove and between stator bar (5) and multi-slot stator (3-1) unshakable in one's determination,
Circulation detection platform (4) include Hall type current transformer (4-1), voltage sample folder (4-2), voltage transformer (4-3),
Acquisition module (4-4) and host computer (4-5),
The both ends of all stator bars (5) are fixedly connected with bar connection terminal (3-2), and bar connection terminal (3-2) passes through
Voltage sample folder (4-2) is connected with voltage transformer (4-3), and voltage transformer (4-3) is used to gather all stator bars (5)
Anode-cathode voltage signal, and the signal of collection is delivered into acquisition module (4-4),
Hall type current transformer (4-1) is used to gathering the internal strand electric current of all stator bars (5), and by the electricity of collection
Stream to acquisition module (4-4),
Acquisition module (4-4) is used to the voltage signal of reception and current signal delivering to host computer (4-5).
4. circulation loss test system between generator stator bar strand according to claim 3, it is characterised in that protection
Device (2) is thermal switch device.
5. circulation loss test system between generator stator bar strand, the test system is used for 1 group of stator bar (5) of test
Circulation loss, and the group includes two stator bars (5), it is characterised in that test system includes power supply platform (1), protection dress
(2), test platform (3) and circulation detection platform (4) are put,
Power supply platform (1) includes exchange regulated power supply (1-1) and transformer (1-2), described exchange regulated power supply (1-1) are used for
It is powered to protection device (2), protection device (2) is pasted onto on an end of any one stator bar (5), protection dress
Put (2) be used for control exchange regulated power supply (1-1) break-make,
Test platform (3) includes bar connection terminal (3-2) and multi-slot stator is (3-1) unshakable in one's determination, described multi-slot stator iron core (3-
1) block of multiple grooves is provided with for upper surface, the length of each groove is equal to multi-slot stator (3-1) unshakable in one's determination length,
One group of stator bar (5) is placed in groove, and two in the groove stator bar (5) is arranged up and down, in groove
Mutually insulated between two stator bars (5) and between stator bar (5) and multi-slot stator (3-1) unshakable in one's determination,
Circulation detection platform (4) include Hall type current transformer (4-1), voltage sample folder (4-2), voltage transformer (4-3),
Acquisition module (4-4) and host computer (4-5),
The both ends of all stator bars (5) are fixedly connected with bar connection terminal (3-2), and bar connection terminal (3-2) passes through
Voltage sample folder (4-2) is connected with voltage transformer (4-3), and voltage transformer (4-3) is used to gather all stator bars (5)
Anode-cathode voltage signal, and the signal of collection is delivered into acquisition module (4-4),
Hall type current transformer (4-1) is used to gathering the internal strand electric current of all stator bars (5), and by the electricity of collection
Stream to acquisition module (4-4),
Acquisition module (4-4) is used to the voltage signal of reception and electric current delivering to host computer (4-5).
6. circulation loss test system between generator stator bar strand according to claim 5, it is characterised in that protection
Device (2) is thermal switch device.
7. using the test that circulation loss test system is realized between the generator stator bar strand described in claim 1,3 or 5
Method, it is characterised in that the detailed process of this method is：
Step 1：It is 5V in the output voltage of transformer (1-2), output frequency 50Hz, total harmonic distortion factor is 0 condition
Under, pass through adjust exchange regulated power supply (1-1) so that transformer (1-2) export respectively 100A, 200A, 300A, 400A, 500A,
600A, 700A, 800A, 900A and 1000A totally 10 groups of data, circulation, acquisition module (4- are produced between stator bar (5) interior strand
4) by voltage transformer (4-3) and Hall type current transformer (4-1) gather in real time all stator bars (5) voltage,
Current signal, and send to host computer (4-5) and store；
Step 2：It is 100A in the output current of transformer (1-2), output frequency 50Hz, total harmonic distortion factor is 0 condition
Under, pass through adjust exchange regulated power supply (1-1) so that transformer (1-2) export respectively 5V, 10V, 15V, 20V, 25V, 30V,
35V, 40V, 45V and 50V totally 10 groups of data, circulation are produced between stator bar (5) interior strand, acquisition module (4-4) passes through voltage
Transformer (4-3) and Hall type current transformer (4-1) gather the voltage of all stator bars (5), current signal in real time, and
Send to host computer (4-5) and store；
Step 3：It is 5V in the output voltage of transformer (1-2), output current 100A, total harmonic distortion factor is 0 condition
Under, pass through adjust exchange regulated power supply (1-1) so that transformer (1-2) respectively output frequency be 10Hz, 20Hz, 30Hz,
40Hz, 50Hz, 60Hz, 70Hz, 80Hz, 90Hz and 100Hz totally 10 groups of data, circulation is produced between stator bar (5) interior strand, is adopted
Collection module (4-4) gathers all stator bars in real time by voltage transformer (4-3) and Hall type current transformer (4-1)
(5) voltage, current signal, and send to host computer (4-5) and store；
Step 4：It is 5V, output frequency 50Hz in the output voltage of transformer (1-2), under conditions of output current is 100A,
Pass through adjust exchange regulated power supply (1-1) so that transformer (1-2) export respectively total harmonic distortion factor be 1%, 2%, 3%,
4%th, 5%, 6%, 7%, 8%, 9% and 10% totally 10 groups of data, circulation, acquisition module are produced between stator bar (5) interior strand
(4-4) gathers the electricity of all stator bars (5) by voltage transformer (4-3) and Hall type current transformer (4-1) in real time
Pressure, current signal, and send to host computer (4-5) and store；
Step 5：Host computer (4-5) carries out circulation loss calculating to 40 groups of test datas of reception, obtains measurement result.
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| CN107632182B (en) * | 2017-09-27 | 2023-07-04 | 哈尔滨理工大学 | AC generator stator bar strand current testing system and method for measuring strand current |
| CN108469549B (en) * | 2018-03-20 | 2020-06-19 | 哈尔滨理工大学 | Motor stator bar surface resistivity multipoint measurement four-electrode system and measurement method thereof |
| CN109374949A (en) * | 2018-10-10 | 2019-02-22 | 哈尔滨理工大学 | Current detecting system |
| CN113820600B (en) * | 2021-11-25 | 2022-02-22 | 天津飞旋科技股份有限公司 | Alternating current resistance testing system, method and device and computer readable storage medium |
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