CN202939267U - Electric power system insulation detection device - Google Patents
Electric power system insulation detection device Download PDFInfo
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- CN202939267U CN202939267U CN 201220558912 CN201220558912U CN202939267U CN 202939267 U CN202939267 U CN 202939267U CN 201220558912 CN201220558912 CN 201220558912 CN 201220558912 U CN201220558912 U CN 201220558912U CN 202939267 U CN202939267 U CN 202939267U
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- system insulation
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Abstract
The utility model provides an electric power system insulation detection device. The electric power system insulation detection device comprises a control processing unit, a digital potentiometer, an amplification unit, an isolation unit, an A/D conversion unit and a CPLD logic control unit, wherein a relay matrix is under the control of the control processing unit to connect positive and negative ends of a bus with a sampling network in order, the relay matrix, the digital potentiometer, the amplification unit, the isolation unit, the A/D conversion unit and the control processing unit are connected in order, the control processing unit is connected with the CPLD logic control unit, the control processing unit is further connected with a storage unit and a real-time clock, and the CPLD logic control unit is connected with an acousto-optic alarm module and a keyboard.
Description
Technical field
The utility model relates to electrical equipment technical field, and a kind of power system insulation pick-up unit is provided.
Background technology
Generating plant and transformer station direct current system are electromechanical integrated devices, and it is comprised of battery pack, charging equipment, control flow, feeding network etc., is a very huge multiple-limb supply network.System adopts 48V, 110V or 220V direct current supply, is (insulation against ground of positive and negative level) isolated neutral system of making floatingly.In generating plant and transformer station, the DC control load comprises electric and control, signal, protection, aut.eq. and some topworks heat power engineering system.These are all that assurance generating plant and electric substation are normal, the very important load of safe operation.DC control supply, except for DC control load power supply, also for some power meet power supply, such as the electromagnetic operating mechanism of large switching current, devices for emergency illumination etc.Particularly in the fuel-burning power plant, also to be the direct current motor power supply of steam turbine lube oil pump, generator hydrogen-tight oil pump and feed pump lube oil pump.These living loads are all to guarantee that the safe start-stop of Turbo-generator Set is necessary, are very important loads.
The quality of straight-flow system operation conditions is directly connected to the generating plant and can transformer station normally move. and one is the modal insulation breakdown fault of straight-flow system with pressing, if can not in time find and get rid of earth point, when multipoint earthing appears in system, can lead to grave consequences.
Simultaneously during ground connection, can not guarantee protection, opertaing device normal operation when the straight-flow system positive and negative electrode, and when serious, fuse be melted disconnected, direct current supply is interrupted, if electric system this moment is broken down, the tripping of protection equipment is done, and will cause that accident further enlarges.Therefore, when straight-flow system generation one point earth, just should detect rapidly and accurately earth fault when guaranteeing the straight-flow system normal power supply, get rid of earth fault, thus the harm of avoiding multipoint earthing to cause.
Summary of the invention
The purpose of this utility model is to provide a kind of power system insulation pick-up unit.
The utility model is by the following technical solutions to achieve these goals:
a kind of power system insulation pick-up unit, it is characterized in that: controlled processing unit, the relay matrix that successively the positive and negative terminal access sampling network of bus is carried out the measurement of insulation resistance under controlled processing unit is controlled, be used for gathering the digital regulation resistance of a bus point information, amplifying unit, isolated location, the A/ converting unit, the CPLD logic control element, described relay matrix, the arithemetic unit device, amplifying unit, isolated location, the A/D converting unit, controlled processing unit is linked in sequence, described controlled processing unit connects the CPLD control module, controlled processing unit is connected with storage unit and real-time clock, described CPLD control module is connected with sound and light alarm module and keyboard.
In such scheme, it is X9C103 that described digital regulation resistance adopts model.
In such scheme, described controlled processing unit adopts chip 78E58B.
In such scheme, described CPLD logic control element adopts chip M7128SLC84-15.
Because the utility model adopts above technical scheme, so have following beneficial effect:
Its collection of the utility model detects, shows, is recorded in one, need not to inject any signal in straight-flow system, therefore straight-flow system is had no effect; Utilize digital regulation resistance and instrument amplifier, realize the wide region measurement; The microcontroller 78E58B of employing WINBOND company is as main frame.In conjunction with succinct programmable logic device (PLD), device performance and processing speed have been improved: adopt the EPROM with house dog, can remember 255 winding earth faults.After the device power down, information is not lost, and externally leaves 485 communication interfaces and added communication protocol on software, can realize range monitoring; Adopt Chinese LCD to show and touch-key, simple and clear, simple to operate, make the user skillfully use this device in the situation that need not instructions.
Description of drawings
Fig. 1 is system block diagram of the present utility model.
Embodiment
a kind of power system insulation pick-up unit, it is characterized in that: controlled processing unit, the relay matrix that successively the positive and negative terminal access sampling network of bus is carried out the measurement of insulation resistance under controlled processing unit is controlled, be used for gathering the digital regulation resistance of a bus point information, amplifying unit, isolated location, the A/ converting unit, the CPLD logic control element, described relay matrix, the arithemetic unit device, amplifying unit, isolated location, the A/D converting unit, controlled processing unit is linked in sequence, described controlled processing unit connects the CPLD control module, controlled processing unit is connected with storage unit and real-time clock, described CPLD control module is connected with sound and light alarm module and keyboard.It is X9C103 that described digital regulation resistance adopts model.Described controlled processing unit adopts chip 78E58B.Described CPLD logic control element adopts chip M7128SLC84-15.Its collection of the utility model detects, shows, is recorded in one, need not to inject any signal in straight-flow system, therefore straight-flow system is had no effect; Utilize digital regulation resistance and instrument amplifier, realize the wide region measurement; The microcontroller 78E58B of employing WINBOND company is as main frame.In conjunction with succinct programmable logic device (PLD), device performance and processing speed have been improved: adopt the EPROM with house dog, can remember 255 winding earth faults.After the device power down, information is not lost, and externally leaves 485 communication interfaces and added communication protocol on software, can realize range monitoring; Adopt Chinese LCD to show and touch-key, simple and clear, simple to operate, make the user skillfully use this device in the situation that need not instructions.
Claims (4)
1. power system insulation pick-up unit, it is characterized in that: controlled processing unit, the relay matrix that successively the positive and negative terminal access sampling network of bus is carried out the measurement of insulation resistance under controlled processing unit is controlled, be used for gathering the digital regulation resistance of a bus point information, amplifying unit, isolated location, the A/D converting unit, the CPLD logic control element, described relay matrix, the arithemetic unit device, amplifying unit, isolated location, the A/D converting unit, controlled processing unit is linked in sequence, described controlled processing unit connects the CPLD control module, controlled processing unit is connected with storage unit and real-time clock, described CPLD control module is connected with sound and light alarm module and keyboard.
2. a kind of power system insulation pick-up unit according to claim 1 is characterized in that: it is X9C103 that described digital regulation resistance adopts model.
3. a kind of power system insulation pick-up unit according to claim 1, is characterized in that: described controlled processing unit employing chip 78E58B.
4. a kind of power system insulation pick-up unit according to claim 1, is characterized in that: described CPLD logic control element employing chip M7128SLC84-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558912 CN202939267U (en) | 2012-10-29 | 2012-10-29 | Electric power system insulation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558912 CN202939267U (en) | 2012-10-29 | 2012-10-29 | Electric power system insulation detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939267U true CN202939267U (en) | 2013-05-15 |
Family
ID=48323498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220558912 Expired - Fee Related CN202939267U (en) | 2012-10-29 | 2012-10-29 | Electric power system insulation detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939267U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181343A (en) * | 2016-03-10 | 2017-09-19 | 通用电气公司 | Ring assembly for motor |
-
2012
- 2012-10-29 CN CN 201220558912 patent/CN202939267U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181343A (en) * | 2016-03-10 | 2017-09-19 | 通用电气公司 | Ring assembly for motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20131029 |