CN206281935U - Isolated neutral system electric voltage exception judgment means - Google Patents
Isolated neutral system electric voltage exception judgment means Download PDFInfo
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- CN206281935U CN206281935U CN201621134340.4U CN201621134340U CN206281935U CN 206281935 U CN206281935 U CN 206281935U CN 201621134340 U CN201621134340 U CN 201621134340U CN 206281935 U CN206281935 U CN 206281935U
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- electric voltage
- judgment means
- system electric
- isolated neutral
- neutral system
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 24
- 238000013500 data storage Methods 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000015654 memory Effects 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
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Abstract
The utility model is related to kind of an isolated neutral system electric voltage exception judgment means, including data acquisition element, data storage elements, logic comparison operation element, output element, display, sound components, it is characterised in that：Three-phase bus voltage transformer low-pressure side installation data acquisition elements, data acquisition element communication connection logic comparison operation element, logic comparison operation element connection data storage elements and output element, output element connects display and sound components.The utility model can accurately be judged various abnormal conditions that result is transported into display, monitoring equipment and control centre, and scene can also send voice message, so as to treatment in time；Electric voltage exception information is stored simultaneously, facilitates staff to be had access to.
Description
Technical field
The utility model belongs to power diagnostic technical field, and in particular to a kind of isolated neutral system electric voltage exception is sentenced
Disconnected device.
Background technology
In transformer station or dispatch center, for isolated neutral system, operations staff or regulation and control personnel Chang Huiyu
To the situation that some busbar voltages are abnormal.If can not in time correctly judgement treatment, it will cause device damage or can because search when
Between it is long and delay power transmission or because misjudgment cause extend fault handling time.Chinese utility model patent《Neutral resistor
Information detection recorder》(application number：200620127313.4)、《A kind of neutral resistance instrument for measuring and recording mutation current》(Shen
Please number：200710037708.4)、《Neutral point grounding resistor monitoring device》(application number：200710108451.7) it is disclosed
, without reference to the fault diagnosis functions of itself of neutral resistance in running, and the memory capacity of peripheral hardware it is low, place
Reason speed is slow；Utility model patent《Neutral-point grounding system malfunction monitoring warning device》(application number：200920261825.3)
Disclosed, a kind of determination methods of neutral resistance failure are only addressed, it is to obtain corresponding by electric current, thermal module
Compare with comparison module judgement neutral resistance ruuning situation afterwards after electric current, temperature value, without reference to utilizing main control chip
And related software directly calculated and diagnosed, while realizing scene and the content such as telecommunication, alarm.
Utility model content
The purpose of this utility model is to provide a kind of isolated neutral system electric voltage exception judgment means.The device can
Accurately judged with to various abnormal conditions, result is transported into display, monitoring equipment and control centre, and scene can also send
Voice message, so as to the reason for allowing operations staff to understand electric voltage exception or allow regulation and control personnel (due to administer transformer station it is many, situation
It is more complicated) rapidly know which stands what reason exception, so as to treatment in time.
The utility model is realized by following technical proposals.A kind of isolated neutral system electric voltage exception judges dress
Put, including data acquisition element, data storage elements, logic comparison operation element, output element, display, sound components, its
It is characterised by：Three-phase bus voltage transformer low-pressure side installation data acquisition elements, data acquisition element communication connection logic ratio
Compared with arithmetic element, comparison operation element connection data storage elements and output element, output element connects display and sound components.
The data acquisition element is by Alternative Voltage Converter, frequency collection device and analog/digital conversion device (ADC) structure
Into Alternative Voltage Converter, frequency collection device connection mode/analog-to-digital conversion apparatus, analog/digital conversion device connection logic comparison operation unit
Part, Alternative Voltage Converter is by of ac (three-phase voltage Ua, Ub, Uc, line voltage of substation bus bar voltage transformer low-pressure side
Uab, Ubc, Uca, residual voltage 3U0) it is changed into DC voltage amount；Frequency collection device gathers transformer substation system frequency and is converted to
DC voltage amount；This 8 voltages are changed into digital quantity by analog/digital conversion device (ADC).
The logic comparison operation element is STM32 single-chip microcomputers.
The data storage elements are flash memories, for storing electric voltage exception information.
The output element is MAX232 chips.
The display is LCD MODULE, for showing fault message and searching historical failure information.
The sound components are voice prompt warning devices.
Further preferably, the device is also equipped with time element and artificial button, and staff can be had access to by button
The electric voltage exception reason and time of origin stored in data storage elements.
Further preferably, the output element is also connected with monitoring equipment, can be led to using intelligent gateway, wireless WiFi, optical fiber
The modes such as letter connect monitoring equipment.
Further preferably, the output element communication connection control centre.
Technique effect of the present utility model：Using data acquisition element capture 6kV or 10kV bus three-phase voltages Ua, Ub,
Uc, residual voltage 3U0, line voltage Uab, Ubc, Uca, frequency F data.Various abnormal conditions can accurately be judged, will
Result is transported to display, monitoring equipment and control centre, and scene can also send voice message, so as to allow operations staff to understand voltage
Abnormal the reason for or to allow regulation and control personnel (because the transformer station administered is more, situation is more complicated) rapidly to know what which stands former
Because of exception, so as to treatment in time.The electric voltage exception situation that the utility model may determine that has：Busbar voltage is too high, busbar voltage
Too low, single phase metal ground connection, single-phase non-metal earthing, circuit breaking, voltage transformer high voltage fuse one mutually fuse, voltage
The fusing of transformer high voltage fuse two-phase, voltage transformer high voltage fuse three-phase fusing, voltage transformer low-tension fuse one mutually fuses,
The fusing of voltage transformer low-tension fuse two-phase, voltage transformer low-tension fuse three-phase fusing, fundamental resonance, high-frequency resonant, frequency dividing
Resonance etc..The present apparatus can be applicable 6KV 10kV isolated neutral systems (only need to change critical parameter).
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model.
Specific embodiment
In order to make it easy to understand, below in conjunction with the accompanying drawings it is further believed that illustrating the utility model.
Reference picture 1, a kind of isolated neutral system electric voltage exception judgment means, including data acquisition element 100, logic
Comparison operation element 200, data storage elements 300, output element 400, display 500, sound components 600, three-phase bus electricity
Pressure transformer low-pressure side installation data acquisition elements 100,6kV or 10kV bus three-phase electricities are captured by data acquisition element 100
Press Ua, Ub, Uc, residual voltage 3U0, line voltage Uab, Ubc, Uca, frequency F data.The communication connection of data acquisition element 100 is patrolled
Whether volume comparison operation element 200 is normal by the detection voltage of logic comparison operation element 200 and judge Exception Type.Logic
The communication connection data storage elements 300 of comparison operation element 200, when electric voltage exception, data storage elements 300 are responsible for storage electricity
Pressing abnormal cause, time etc., and staff can be had access to by button.Logic comparison operation element 200 also connects output
Element 400, output element 400 connection display 500 and sound components 600.When electric voltage exception, abnormal information output is arrived aobvious
Show device screen display and send audio alert.The output element 400 is also connected with monitoring equipment, can be using intelligent gateway, wireless
The modes such as WiFi, fiber optic communication connect monitoring equipment.The output element 400 communicates to connect control centre.The logic compares fortune
Calculation element 200 is substantially carried out following judgement and compares：Ua, Ub, Uc of collection are compared with standard value, judge whether voltage is normal,
And shown on display 500, if abnormal, whether determination frequency is normal, if frequency is abnormal, by comparing frequency
Rate whether more than 50Hz judging " high-frequency resonant overvoltage " or " Subharmonic Resonance overvoltage "；If frequency is normal, compare zero
Sequence voltage 3U0Whether 15V is more than, if no more than 15V, any- phase voltage compares to judge it is voltage transformer A phases with 0
Low pressure fuse melting, voltage transformer B phase low pressure fuse melting, voltage transformer C phase low pressure fuse melting, busbar voltage are inclined
High, busbar voltage is relatively low, and shows over the display, alarms.If greater than 15V, then by Ua, Ub, UcDetected with previous moment
Normal value compare, and then judgement be：Two-phase voltage is normal, phase voltage reduction；Or two-phase voltage is raised, phase voltage drop
It is low；Or two-phase voltage reduction, a phase voltage are raised；Further according to circumstances make single phase metal ground connection, it is single-phase nonmetallic
Property ground connection, circuit breaking, voltage transformer high voltage fuse one mutually fuse, the fusing of voltage transformer high voltage fuse two-phase, voltage it is mutual
Sensor high voltage fuse three-phase fusing, voltage transformer low-tension fuse one mutually fuse, voltage transformer low-tension fuse two-phase fuses, electricity
Pressure transformer low-tension fuse three-phase fusing, fundamental resonance judge.
The data acquisition element is by Alternative Voltage Converter, frequency collection device and analog/digital conversion device (ADC) structure
Into Alternative Voltage Converter, frequency collection device connection mode/analog-to-digital conversion apparatus, analog/digital conversion device connection logic comparison operation unit
Part, Alternative Voltage Converter is by of ac (three-phase voltage Ua, Ub, Uc, line voltage of substation bus bar voltage transformer low-pressure side
Uab, Ubc, Uca, residual voltage 3U0) it is changed into DC voltage amount；Frequency collection device gathers transformer substation system frequency and is converted to
DC voltage amount；This 8 voltages are changed into digital quantity by analog/digital conversion device (ADC).
The logic comparison operation element is STM32 single-chip microcomputers.
The data storage elements are flash memories, for storing electric voltage exception information.
The output element is MAX232 chips.
The display is LCD MODULE, for showing fault message and searching historical failure information.
The sound components are voice prompt warning devices.
Further preferably, the device is also equipped with time element and artificial button, and staff can be had access to by button
The electric voltage exception reason and time of origin stored in data storage elements.
Further preferably, the output element is also connected with monitoring equipment, can be led to using intelligent gateway, wireless WiFi, optical fiber
The modes such as letter connect monitoring equipment.
Further preferably, the output element communication connection control centre.
Further, the monitoring equipment connects the breaker and transformer in each phase line.
Claims (9)
1. a kind of isolated neutral system electric voltage exception judgment means, including data acquisition element, data storage elements, logic
Comparison operation element, output element, display, sound components, it is characterised in that：Three-phase bus voltage transformer low-pressure side is installed
Data acquisition element, data acquisition element communication connection logic comparison operation element, comparison operation element connection data storage unit
Part and output element, output element connect display and sound components.
2. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The data
Acquisition elements are made up of Alternative Voltage Converter, frequency collection device and analog/digital conversion device, Alternative Voltage Converter, frequency
Collector connection mode/analog-to-digital conversion apparatus, analog/digital conversion device connection logic comparison operation element.
3. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The logic
Comparison operation element is STM32 single-chip microcomputers.
4. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The data
Memory element is flash memory.
5. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The output
Element is MAX232 chips.
6. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The display
Device is LCD MODULE.
7. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The sound
Element is voice prompt warning device.
8. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The output
Element connects monitoring equipment by intelligent gateway, wireless WiFi or fiber optic communication.
9. isolated neutral system electric voltage exception judgment means according to claim 1, it is characterised in that：The output
Element communication connects control centre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134340.4U CN206281935U (en) | 2016-10-18 | 2016-10-18 | Isolated neutral system electric voltage exception judgment means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134340.4U CN206281935U (en) | 2016-10-18 | 2016-10-18 | Isolated neutral system electric voltage exception judgment means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206281935U true CN206281935U (en) | 2017-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621134340.4U Expired - Fee Related CN206281935U (en) | 2016-10-18 | 2016-10-18 | Isolated neutral system electric voltage exception judgment means |
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| Country | Link |
|---|---|
| CN (1) | CN206281935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226722A (en) * | 2017-12-19 | 2018-06-29 | 神华集团有限责任公司 | Insulated monitoring method, apparatus and system |
-
2016
- 2016-10-18 CN CN201621134340.4U patent/CN206281935U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226722A (en) * | 2017-12-19 | 2018-06-29 | 神华集团有限责任公司 | Insulated monitoring method, apparatus and system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170627 Termination date: 20171018 |