CN206281935U - Isolated neutral system electric voltage exception judgment means - Google Patents

Isolated neutral system electric voltage exception judgment means Download PDF

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Publication number
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
Authority
CN
China
Prior art keywords
electric voltage
output
isolated neutral
voltage exception
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201621134340.4U
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Chinese (zh)
Inventor
朱於建
周娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Jiangxi Electric Power Co Nanchang New District Power Supply Branch
State Grid Corp of China SGCC
State Grid Jiangxi Electric Power Co Ltd
Original Assignee
State Grid Jiangxi Electric Power Co Nanchang New District Power Supply Branch
State Grid Corp of China SGCC
State Grid Jiangxi Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Jiangxi Electric Power Co Nanchang New District Power Supply Branch, State Grid Corp of China SGCC, State Grid Jiangxi Electric Power Co Ltd filed Critical State Grid Jiangxi Electric Power Co Nanchang New District Power Supply Branch
Priority to CN201621134340.4U priority Critical patent/CN206281935U/en
Application granted granted Critical
Publication of CN206281935U publication Critical patent/CN206281935U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Isolated neutral system electric voltage exception judgment means
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.
CN201621134340.4U 2016-10-18 2016-10-18 Isolated neutral system electric voltage exception judgment means Expired - Fee Related CN206281935U (en)

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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Family Applications (1)

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

Country Status (1)

Country Link
CN (1) CN206281935U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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
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