CN209342807U - A kind of generator rotor insulation detection device - Google Patents
A kind of generator rotor insulation detection device Download PDFInfo
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- CN209342807U CN209342807U CN201821963722.7U CN201821963722U CN209342807U CN 209342807 U CN209342807 U CN 209342807U CN 201821963722 U CN201821963722 U CN 201821963722U CN 209342807 U CN209342807 U CN 209342807U
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- detection device
- insulation detection
- generator rotor
- rotor insulation
- generator
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Abstract
The utility model provides a kind of generator rotor insulation detection device, including low-frequency square-wave power supply, low-frequency square-wave power supply is set between the negative terminal and the big axis of rotor of generator amature winding, or low-frequency square-wave power supply is set between the positive and negative both ends and the big axis of rotor of generator amature winding, leakage current measurement module is equipped in the circuit of generator amature winding, low-frequency square-wave power supply and the big axis connection of rotor, control unit connects leakage current measurement module.Device provided by the utility model overcomes the deficiencies in the prior art, the high-precision real-time monitoring to rotor insulation resistance can be completed, and is grounded the stage on one point, two sections of alarms are set, to issue two sections of alarm signals in time when not developing into two points ground fault failure, accident further expansion is prevented.Device calculating speed is fast, sampling precision is high, strong antijamming capability, have it is multi-functional, advantageously ensure that the safety of motor and power grid.
Description
Technical field
The utility model relates to a kind of generator rotor insulation detection device, for the insulation resistance to generator amature into
Row real-time monitoring, and corresponding police instruction is made in the event of a failure, belong to generator rotor insulation detection technique field.
Background technique
When generator amature runs at high speed, one-point grounding fault easily occurs.When one point earth occurs, electric current is not constituted
Access does not influence the symmetrical and reactive power output of magnetic circuit, does not cause damages to generator itself, generator still can be transported normally
Row.But after one point earth occurs for energized circuit, if failure is handled not in time, probably make rotor windings insulation weak spot
Insulation breakdown and occur another point ground connection.Short-circuit current paths are constituted after two points ground fault, may cause major accident, for example burn out
Rotor windings and iron core, and since part excitation winding is shorted, air-gap field symmetry is destroyed, and unit will be caused violent
Vibration and idle power output reduce.Therefore, online insulation resistance detection is carried out to generating set to be of great significance.
Rotor insulation resistor detecting device is the indispensable equipment in power plant.However, existing power generation on the market at present
The problems such as generally existing measurement accuracy of machine rotor insulation detection device is not high, on the high side, human-computer interaction is unfriendly.
The development of microprocessing and improving as rotor insulation resistor detecting device performance for Technique of Weak Signal Detection
It improves and the reduction of cost provides possibility.Therefore, research and development have turn that measurement accuracy is high, cost performance is high, human-computer interaction is friendly
Insulating sublayer resistor detecting device is inexorable trend.
Utility model content
Technical problem to be solved by the utility model is: how to generator rotor insulation resistance carry out in time, it is accurate, can
The detection leaned on.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is to provide a kind of generator rotor insulation detection
Device, it is characterised in that: including low-frequency square-wave power supply, low-frequency square-wave power supply is big set on the negative terminal and rotor of generator amature winding
Between axis or low-frequency square-wave power supply is set between the positive and negative both ends and the big axis of rotor of generator amature winding, generator amature
Leakage current measurement module is equipped in the circuit of winding, low-frequency square-wave power supply and the big axis connection of rotor, control unit connects leakage current
Measurement module.
Preferably, described control unit connection digital quantity input module, digital output module, communication module and display mould
Block.
Preferably, described control unit is made of the dsp chip and programmable logic device FPGA interconnected.
It is highly preferred that the communication module includes microcontroller ARM chip, control unit connects microcontroller ARM chip,
Microcontroller ARM chip connects 485 communication interfaces, CAN communication interface, IRIG interface, Industrial Ethernet interface.
Further, 485 communication interface, IRIG interface pass through receiver respectively and connect with microcontroller ARM chip.
It is highly preferred that the display module is configuration industrial serial ports screen.
Preferably, described control unit is also connected with LED operation indicating module.
Preferably, described control unit is also connected with power module.
Preferably, whole device is packaged in one and has in the subrack of electro-magnetic screen function.
It is highly preferred that the subrack is aluminium alloy extrusions subrack.
Generator rotor insulation detection device provided by the utility model uses both-end pouring-in or single-ended pouring-in principle,
From a low-frequency square-wave power supply is injected between the negative terminal (or positive and negative both ends) of rotor windings and big axis, pass through the electric leakage of measurement circuit
Stream, Real-time solution rotor insulation resistance value.The detection to rotor insulation resistance is realized by control unit, and is transferred to corresponding
It shows in equipment.
Device provided by the utility model overcomes the deficiencies in the prior art, can complete to the high-precision of rotor insulation resistance
Real-time monitoring is spent, and is grounded the stage on one point, two sections of alarms are set, to send out in time when not developing into two points ground fault failure
Two sections of alarm signals out prevent accident further expansion.Device calculating speed is fast, sampling precision is high, and strong antijamming capability has
It is multi-functional, advantageously ensure that the safety of motor and power grid.
Detailed description of the invention
Fig. 1 is generator rotor insulation detection device schematic diagram provided in this embodiment；
Fig. 2 is both-end injecting principle figure；
Fig. 3 is single-ended injecting principle figure.
Specific embodiment
Generator rotor insulation detection device provided by the utility model uses both-end pouring-in or single-ended pouring-in principle,
From a low-frequency square-wave power supply is injected between the negative terminal (or positive and negative both ends) of rotor windings and big axis, pass through the electric leakage of measurement circuit
Stream, Real-time solution rotor insulation resistance value.Pass through high-performance digital signal processor dsp chip and field programmable logic device
Fpga chip realizes the detection to rotor insulation resistance.By high-performance ARM chip, realize that monitoring signals are real on a display screen
When display and parameter value online modification.In addition, device is configured with a network interface, for realizing the connection with host computer；One
A 485 interface, two CAN interfaces, for realizing the data communication with other same-interface equipment；One IRIG interface, is used to
Realize B code clock synchronization.
Fig. 1 is generator rotor insulation detection device schematic diagram provided in this embodiment, the generator rotor insulation
Detection device is mainly grouped as by control section and measurement portion, it is other also comprising power unit, communications portion, digital quantity part with
And display portion.Specific manifestation are as follows: the input of 16 railway digital amounts, the output of 16 railway digital amounts, 1 tunnel, 485 communication interface, 2 tunnel CAN communications
Interface, 1 road IRIG interface, 1 tunnel Industrial Ethernet interface, the instruction of 4 road transport rows, 1 piece of serial ports screen are shown.
Control section is configured with 1 piece of 32 floating numbers processing chip DSP and 1 piece of programmable logic device FPGA, is used for
Signal processing；2 pieces of ADC modulus conversion chips are configured with, analog-to-digital conversion is used for.Control section is integrated on one piece of four laminate, is claimed
Be control panel.5 connectors are configured with simultaneously on control panel, for connecting measurement plate, two block number word templates, power panel, leading to
Believe plate.
Digital quantity part contains two block number word templates, and one of is expansion board.Every block number word template, which respectively receives, to be come from
8 road DI signals, the 8 road DO signals of master control borad.By digital circuit, 8 road DI input, 8 road DO output are realized.
Communications portion is configured with 1 piece of 32 8-digit microcontroller ARM chip, 2 low power receiver chips, for drawing 1 tunnel
485 interfaces, 1 road IRIG interface；It is configured with 1 piece of CAN interface chip, for drawing CAN interface all the way；It is configured with 1 piece of Ethernet
Chip, for drawing Ethernet interface all the way.Communication board connects LED board and serial ports screen by flat wire, for controlling LED signal
Lamp and display screen.
Display portion uses 5.6 cun of resolution ratio as the basic model configuration industrial serial ports screen of 640*480, adapts to severe ring
The workplaces such as border, strong magnetic disturbance and open air.
In conjunction with Fig. 2 and Fig. 3, measurement part implements process are as follows: from rotor using single-ended injection or both-end injecting principle
A low-frequency square-wave power supply is injected between the negative terminal (or positive and negative both ends) and the big axis 1 of rotor of winding, by measuring circuit leakage current,
Real-time solution rotor insulation resistance value.Measurement plate is connected by connector with master control borad.
At anti-interference aspect, all hardware is all encapsulated in an aluminium alloy extrusions subrack by module, and complete machine has electricity
Magnetic screen function.
Each section principle and Functional Design are as follows:
1, DSP is serial 32 float-point DSP processors of high-performance TMS320C28x that TI company releases, wherein low 16
Address bus and 16 bit data bus together form the external parallel bus of DSP, and floating number calculates, standard C language programming.It is main
Function is wanted to realize the functions such as sampling, calculating, logic judgment.
2, FPGA is the EP2C8Q208C8 programmable logic chip FPGA that ALITERA company releases, and includes 10,000 gate logics
Unit, the perfect of each function of sufficient resource guarantee realize that each controller is write by VHDL entirely inside FPGA, after synthesis under
It is downloaded in FPGA and runs.
3, ARM is serial 32 8-digit microcontrollers of STM32F103 that ST company releases, and standard C language programs, and major function is
Realize that display screen is shown.
4, network interface uses DM9000 family chip, is connect between ARM by parallel bus.
Generator rotor insulation detection device calculating speed provided in this embodiment is fast, sampling precision is high, anti-interference ability
By force, the safety of motor and power grid is advantageously ensured that.
The above, the only preferred embodiment of the utility model, it is in any form and substantive not to the utility model
On limitation, it is noted that for those skilled in the art, in the premise for not departing from the utility model method
Under, several improvement and supplement can be also made, these are improved and supplement also should be regarded as the protection scope of the utility model.It is all ripe
Professional and technical personnel is known, in the case where not departing from the spirit and scope of the utility model, when using disclosed above
Technology contents and the equivalent variations of a little variation, modification and evolution made, be the equivalent embodiment of the utility model；Together
When, all substantial technologicals according to the utility model to the variation, modification and evolution of any equivalent variations made by above-described embodiment,
In the range of still falling within the technical solution of the utility model.
Claims (10)
1. a kind of generator rotor insulation detection device, it is characterised in that: including low-frequency square-wave power supply, low-frequency square-wave power supply is set to
Between the big axis of negative terminal and rotor of generator amature winding or low-frequency square-wave power supply is set to positive and negative the two of generator amature winding
Between end and the big axis of rotor, leakage current is equipped in the circuit of generator amature winding, low-frequency square-wave power supply and the big axis connection of rotor
Measurement module, control unit connect leakage current measurement module.
2. a kind of generator rotor insulation detection device as described in claim 1, it is characterised in that: described control unit connection
Digital quantity input module, digital output module, communication module and display module.
3. a kind of generator rotor insulation detection device as claimed in claim 1 or 2, it is characterised in that: described control unit
It is made of the dsp chip and programmable logic device FPGA that interconnect.
4. a kind of generator rotor insulation detection device as claimed in claim 2, it is characterised in that: the communication module includes
Microcontroller ARM chip, control unit connection microcontroller ARM chip, 485 communication interfaces of microcontroller ARM chip connection,
CAN communication interface, IRIG interface, Industrial Ethernet interface.
5. a kind of generator rotor insulation detection device as claimed in claim 4, it is characterised in that: 485 communication interface,
IRIG interface passes through receiver respectively and connect with microcontroller ARM chip.
6. a kind of generator rotor insulation detection device as claimed in claim 2, it is characterised in that: the display module is group
State industrial serial ports screen.
7. a kind of generator rotor insulation detection device as described in claim 1, it is characterised in that: described control unit also connects
Connect LED operation indicating module.
8. a kind of generator rotor insulation detection device as described in claim 1, it is characterised in that: described control unit also connects
Connect power module.
9. a kind of generator rotor insulation detection device as described in claim 1, it is characterised in that: whole device is packaged in one
In a subrack for having electro-magnetic screen function.
10. a kind of generator rotor insulation detection device as claimed in claim 9, it is characterised in that: the subrack is aluminium conjunction
Metal type material subrack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821963722.7U CN209342807U (en) | 2018-11-27 | 2018-11-27 | A kind of generator rotor insulation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821963722.7U CN209342807U (en) | 2018-11-27 | 2018-11-27 | A kind of generator rotor insulation detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209342807U true CN209342807U (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821963722.7U Active CN209342807U (en) | 2018-11-27 | 2018-11-27 | A kind of generator rotor insulation detection device |
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| CN (1) | CN209342807U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112217348A (en) * | 2020-09-07 | 2021-01-12 | 华能南京金陵发电有限公司 | Device and method for eliminating electric corrosion of brushless rotating excitation generator rotor grounding detection slip ring |
-
2018
- 2018-11-27 CN CN201821963722.7U patent/CN209342807U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112217348A (en) * | 2020-09-07 | 2021-01-12 | 华能南京金陵发电有限公司 | Device and method for eliminating electric corrosion of brushless rotating excitation generator rotor grounding detection slip ring |
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