CN207717940U - A kind of excitation harvester for generator on-line monitoring system - Google Patents
A kind of excitation harvester for generator on-line monitoring system Download PDFInfo
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- CN207717940U CN207717940U CN201820016214.1U CN201820016214U CN207717940U CN 207717940 U CN207717940 U CN 207717940U CN 201820016214 U CN201820016214 U CN 201820016214U CN 207717940 U CN207717940 U CN 207717940U
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Abstract
The utility model discloses a kind of excitation harvesters for generator on-line monitoring system, including AC sampling unit, 4 20mA analog acquisitions units, A/D conversion chips, DSP processing chips, optical coupling isolator, exit relay and cpu chip；AC sampling unit and 4 20mA analog acquisitions units are connected with A/D conversion chips respectively；The output end of A/D conversion chips is connected with the input terminal of DSP processing chips；The input terminal of DSP processing chips is also connected with the output end of optical coupling isolator；The output end of the DSP processing chips is connected with the input terminal of exit relay, and exit relay is connected with operation alarm module；The data transmission terminal of the cpu chip is connected with the data transmission terminal of DSP processing chips.The data of the utility model acquire and communication high speed, real-time, reliability height, and will not interfere the safe and stable operation of field regulator；Modularized design, easy to connect, universal flexible, expandability are good；Strong antijamming capability.
Description
Technical field
The utility model belongs to generator excitation harvester technical field, and in particular to one kind is supervised online for generator
The excitation harvester of examining system.
Background technology
Large-scale power grid is generally made of the generating set of several paired runnings, the safety of generating set and operation of power networks
It influences each other with control performance, mutually restrict, and generator excited system is the most important knob for contacting generating set and power grid
One of band.Generator excited system relates to net equipment as important, is the important object of net source coordination management, accurately grasps each
The mathematical model of the grid-connected DCgenerator motor field system of platform is to build one of strong, intelligent grid basic work with characterisitic parameter.
Currently, excitation system mainly measures hand to power grid variation dynamic response performance by off-line calculation and field test
Section, can not judge the abnormality of certain generator excitation system online, and to affect, electric network fault prevents and failure is rung
The real-time answered.Therefore, using the method for on-line monitoring and assessment, so that it may to reinforce to generator excitation system parameter and change
Real-time management is measured, perturbation analysis and the fault pre-alarming effect of monitoring system is played, promotes autonomous analysis of the power grid to system disturbance
And appreciable levels.
Utility model content
In view of the above-mentioned problems, the utility model proposes a kind of excitation harvester for generator on-line monitoring system,
The important electrical quantity of generating set, controlled quentity controlled variable and the state amount of outputing can be acquired in real time, and are uploaded to plant stand host, data acquisition
At a high speed, in real time with communication, reliability is high, and will not interfere the safe and stable operation of field regulator；Modularized design, connection side
Just, universal flexible, expandability are good；Strong antijamming capability.
It realizes above-mentioned technical purpose, reaches above-mentioned technique effect, the utility model is achieved through the following technical solutions：
A kind of excitation harvester for generator on-line monitoring system, including AC sampling unit, 4-20mA simulation
Measure collecting unit, A/D conversion chips, DSP processing chips, optical coupling isolator, exit relay and cpu chip；
The input with A/D conversion chips respectively of the output end of the AC sampling unit and 4-20mA analog acquisition units
End is connected, and the controlled quentity controlled variable of the mutual inductor output and field regulator that are respectively used to acquisition system exports, and is sent to A/D conversion cores
Piece；
The output end of the A/D conversion chips is connected with the input terminal of DSP processing chips；
The input terminal of the DSP processing chips is also connected with the output end of optical coupling isolator, and the optical coupling isolator is used for
Acquire the hard contact state of field regulator；The output end of the DSP processing chips is connected with the input terminal of exit relay, goes out
Mouth relay is connected with operation alarm module, is used for outputting alarm signal；
The data transmission terminal of the cpu chip is connected with the data transmission terminal of DSP processing chips, and DSP processing chips will encourage
Magnetic information sends cpu chip to.
Further, the excitation harvester for generator on-line monitoring system further includes display, described aobvious
The data transmission terminal for showing device is connected with the data transmission terminal of cpu chip.
Further, the excitation harvester for generator on-line monitoring system further include optical fiber communication modules and
Plant stand monitors host, and by optical fiber and DSP processing chips, the other end passes through optical fiber and plant stand for one end of the fiber optic telecommunications module
Host is monitored to be connected.
Further, a kind of excitation harvester for generator on-line monitoring system further includes RS485 logical
Believe that interface, the DSP processing chips are communicated by RS485 communication interfaces with field regulator, the Excitation Adjustment for will inquire
Section device relates to network parameters and status data and is transmitted to plant stand monitoring host by fiber optic telecommunications module.
Further, a kind of excitation harvester for generator on-line monitoring system, further includes printer,
The input terminal of the printer is connected with the output end of cpu chip.
Further, the quantity of the A/D conversion chips is 2, the input terminal of the two respectively with AC sampling unit and
The output end of 4-20mA analog acquisition units is connected, and the output end of the two is connected with DSP processing chips.
Further, the operation alarm module includes that contact is outputed in warning light and alarm.
The beneficial effects of the utility model：
The utility model proposes a kind of excitation harvesters for generator on-line monitoring system, can acquire hair in real time
The important electrical quantity of motor group, controlled quentity controlled variable and the state amount of outputing, and uploaded to plant stand host, data acquisition and communication are at a high speed, in fact
When, reliability is high, and will not interfere the safe and stable operation of field regulator；Modularized design, easy to connect, universal flexible,
Expandability is good；And it is provided with alarm module, any exception information that gatherer process occurs will be transmitted to operation alarm module, and
Alarm prompt is externally sent out by operation alarm module, including：To lower communicating interrupt or exception, transmitter broken string or abnormal measures
PT breaks, slave device failure or exception, and on-line monitoring function exits, strong antijamming capability.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of embodiment of the utility model.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to embodiments, to this
Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain this practicality
It is novel, it is not used to limit the utility model.
The application principle of the utility model is explained in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of excitation harvester for generator on-line monitoring system, including AC sampling unit,
4-20mA analog acquisitions unit, A/D conversion chips, DSP processing chips, optical coupling isolator, exit relay and cpu chip；
The input with A/D conversion chips respectively of the output end of the AC sampling unit and 4-20mA analog acquisition units
End is connected, and the controlled quentity controlled variable of the mutual inductor output and field regulator that are respectively used to acquisition system exports, the mutual inductor output letter
Number include：System voltage, set end voltage, generator terminal electric current, excitation voltage, exciting current；The controlled quentity controlled variable of the field regulator is defeated
Going out signal includes：Control voltage output, PSS (power system steady stability device) is exported, voltage is given and PSVR (generator excitations
Regulating device) output etc., and it is sent to A/D conversion chips；
The output end of the A/D conversion chips is connected with the input terminal of DSP processing chips, by DSP processing chips to receiving
To signal handled；In the preferred embodiment of the utility model, the quantity of the A/D conversion chips is 2, the two
Input terminal is connected with the output end of AC sampling unit and 4-20mA analog acquisition units respectively, the output end of the two with
DSP processing chips are connected；
The input terminal of the DSP processing chips is also connected with the output end of optical coupling isolator, and the optical coupling isolator is used for
The main hard contact state of field regulator is acquired, and is exported to DSP processing chips；The output end of the DSP processing chips
It is connected with the input terminal of exit relay, exit relay is connected with operation alarm module, is used for outputting alarm signal, including survey
Measure exception, communicating interrupt, itself exception etc.；The operation alarm module includes that contact is outputed in warning light and alarm；
The data transmission terminal of the cpu chip is connected with the data transmission terminal of DSP processing chips, and DSP processing chips will encourage
Magnetic information sends cpu chip to.
In specific implementation process, the AC sampling unit, 4-20mA analog acquisitions unit, A/D conversion chips,
DSP processing chips, optical coupling isolator, exit relay and cpu chip are all made of the device that can be purchased on the market.
It is described for generator on-line monitoring system in order to realize human-computer interaction in a kind of embodiment of the utility model
The excitation harvester of system further includes display, and the data transmission terminal of the display is connected with the data transmission terminal of cpu chip,
To realize the inquiry on the spot of gathered data, event message, displacement information etc..
In a kind of embodiment of the utility model, the excitation harvester for generator on-line monitoring system is also
Including printer, the input terminal of the printer is connected with the output end of cpu chip, is handled by DSP processing chips for printing
The information crossed.
In a kind of embodiment of the utility model, the excitation harvester for generator on-line monitoring system is also
Host is monitored including optical fiber communication modules and plant stand, one end of the fiber optic telecommunications module is by optical fiber and DSP processing chips, separately
One end monitors host with plant stand by optical fiber and is connected, and collected information, which is directly transferred to plant stand, monitors host；Meanwhile it acquiring
Any exception information that process occurs will be transmitted to operation alarm module, and externally send out alarm prompt by operation alarm module,
Using optical-fibre channels as data transmission link, excitation data are sent to plant stand and monitor host, send gap periods only 1ms,
Realize the real-time reliable upload of excitation gathered data.
The excitation harvester for generator on-line monitoring system further includes RS485 communication interfaces, at the DSP
Reason chip is communicated by RS485 communication interfaces with field regulator, and RS485 communication interfaces are with modbus stipulations according to the week of setting
Period receives and parsing response message every sending out query message, and the field regulator inquired is related to network parameters and state
Data are transmitted to plant stand by fiber optic telecommunications module and monitor host, while being sent to cpu chip, for being shown by display or
Person is printed by printer, and being also uploaded to plant stand by optical fiber communication modules with IEC60044-8 agreements monitors host.Together
When, any exception information that RS485 communication interfaces occur in communication process, such as communicating interrupt, response abnormality, communication overtime
Deng all will be transmitted to operation alarm module, device externally sends out alarm prompt.The excitation relates to network parameters：AVR main rings (electricity
Pressure ring) pid parameter, it is low encourage/cross encourage limitation secondary ring parameter, adjust poor parameter, PSS model parameters；The excited state data refer to：
Fault message, warning information, restricted information and running state information of AVR etc..The excitation harvester can also pass through RS485
Communication interface receives unit electrical quantity, controlled quentity controlled variable and quantity of state, to save analog quantity sampling element.
In conclusion the major function that the present apparatus is realized includes acquisition computing function, communication function and operation warning function,
As shown in table 1：
Table 1
In summary：
The utility model proposes a kind of excitation harvesters for generator on-line monitoring system, can acquire hair in real time
The important electrical quantity of motor group, controlled quentity controlled variable and the state amount of outputing, and uploaded to plant stand host, data acquisition and communication are at a high speed, in fact
When, reliability is high, and will not interfere the safe and stable operation of field regulator；Modularized design, easy to connect, universal flexible,
Expandability is good；And it is provided with alarm module, any exception information that gatherer process occurs will be transmitted to operation alarm module, and
Alarm prompt is externally sent out by operation alarm module, including：To lower communicating interrupt or exception, transmitter broken string or abnormal measures
PT breaks, slave device failure or exception, and on-line monitoring function exits, strong antijamming capability.
The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (7)
1. a kind of excitation harvester for generator on-line monitoring system, it is characterised in that：Including AC sampling unit, 4-
20mA analog acquisitions unit, A/D conversion chips, DSP processing chips, optical coupling isolator, exit relay and cpu chip；
The output end of the AC sampling unit and 4-20mA analog acquisition units input terminal phase with A/D conversion chips respectively
Even, the controlled quentity controlled variable of the mutual inductor output and field regulator that are respectively used to acquisition system exports, and is sent to A/D conversion chips；
The output end of the A/D conversion chips is connected with the input terminal of DSP processing chips；
The input terminal of the DSP processing chips is also connected with the output end of optical coupling isolator, and the optical coupling isolator is for acquiring
The hard contact state of field regulator；The output end of the DSP processing chips is connected with the input terminal of exit relay, outlet after
Electric appliance is connected with operation alarm module, is used for outputting alarm signal；
The data transmission terminal of the cpu chip is connected with the data transmission terminal of DSP processing chips, and DSP processing chips believe excitation
Breath sends cpu chip to.
2. a kind of excitation harvester for generator on-line monitoring system according to claim 1, it is characterised in that：
The excitation harvester for generator on-line monitoring system further includes display, the data transmission of the display
End is connected with the data transmission terminal of cpu chip.
3. a kind of excitation harvester for generator on-line monitoring system according to claim 1, it is characterised in that：
The excitation harvester for generator on-line monitoring system further includes that fiber optic telecommunications module and plant stand monitor host,
By optical fiber and DSP processing chips, the other end monitors host with plant stand by optical fiber and is connected for one end of the fiber optic telecommunications module.
4. a kind of excitation harvester for generator on-line monitoring system according to claim 3, it is characterised in that：
Further include RS485 communication interfaces, the DSP processing chips are communicated by RS485 communication interfaces with field regulator, are used for
The field regulator inquired is related into network parameters and status data, plant stand monitoring host is transmitted to by fiber optic telecommunications module.
5. a kind of excitation harvester for generator on-line monitoring system according to claim 1, it is characterised in that：
Further include printer, the input terminal of the printer is connected with the output end of cpu chip.
6. a kind of excitation harvester for generator on-line monitoring system according to claim 1, it is characterised in that：
The quantity of the A/D conversion chips is 2, and the input terminal of the two is adopted with AC sampling unit and 4-20mA analog quantitys respectively
The output end for collecting unit is connected, and the output end of the two is connected with DSP processing chips.
7. a kind of excitation harvester for generator on-line monitoring system according to claim 1, it is characterised in that：
The operation alarm module includes that contact is outputed in warning light and alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820016214.1U CN207717940U (en) | 2018-01-05 | 2018-01-05 | A kind of excitation harvester for generator on-line monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820016214.1U CN207717940U (en) | 2018-01-05 | 2018-01-05 | A kind of excitation harvester for generator on-line monitoring system |
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| Publication Number | Publication Date |
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| CN207717940U true CN207717940U (en) | 2018-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051744A (en) * | 2018-01-05 | 2018-05-18 | 贵州电网有限责任公司电力调度控制中心 | A kind of excitation harvester for generator on-line monitoring system |
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2018
- 2018-01-05 CN CN201820016214.1U patent/CN207717940U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051744A (en) * | 2018-01-05 | 2018-05-18 | 贵州电网有限责任公司电力调度控制中心 | A kind of excitation harvester for generator on-line monitoring system |
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