CN107132464B - A kind of bus insulation monitoring system - Google Patents
A kind of bus insulation monitoring system Download PDFInfo
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- CN107132464B CN107132464B CN201710432493.XA CN201710432493A CN107132464B CN 107132464 B CN107132464 B CN 107132464B CN 201710432493 A CN201710432493 A CN 201710432493A CN 107132464 B CN107132464 B CN 107132464B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of bus insulations to monitor system；Control unit obtains each phase voltage of bus PT secondary side by first detection unit and residual voltage value, second detection unit obtain bus PT open delta voltage, and each phase voltage of bus PT secondary side, residual voltage value, bus PT open delta voltage preset voltage value are compared respectively, and control fault warning unit movement is instructed according to comparison result.Above-mentioned numerical value is simultaneously compared by the numerical value of each phase voltage of real-time monitoring bus PT secondary side of the present invention and residual voltage value and open delta voltage with preset voltage value, carry out the real work situation of isolated-phase buses further according to comparison result, when being abnormal situation, the timely output abnormality result of system simultaneously carries out abnormality alarming, so that relevant staff understands the abnormal conditions in the bus course of work in time and takes targetedly remedial measure, guarantee the normal table working condition of bus.
Description
Technical field
The present invention relates to bus insulation monitoring technical fields more particularly to a kind of bus insulation to monitor system.
Background technique
The effect of bus is to collect, distribute and transmit electric energy.In operation due to bus, huge electric energy passes through, it is short
Lu Shi subjects very big fever and dynamo-electric effect, therefore, it is necessary to which the working condition to bus is monitored, not only favorably
In the normal work effect of guarantee bus, and be conducive to the requirement for meeting the safe and economic operation.
Bus insulation proposed by the present invention monitors system, and each phase voltage of PT secondary side and residual voltage can be monitored in real time,
When finding that bus insulation decline or PT are broken, can alarm in time, and real-time monitoring bus PT open delta voltage 17Hz,
The component of voltage of tetra- kinds of characteristic frequencies of 25Hz, 50Hz, 150Hz, distinguish overvoltage, ferromagnetic resonance failure, cooperation Field Force into
Row ground fault, resonance failure, overvoltage failure, the diagnosis of disconnection fault and investigation work, can configure RS485 communication interface,
Suitable for unattended operation transformer station.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of bus insulations to monitor system.
Bus insulation proposed by the present invention monitors system, comprising:
First detection unit, for acquiring each phase voltage of bus PT secondary side and residual voltage value；
Second detection unit, for acquiring bus PT open delta voltage；
Fault warning unit is communicated to connect with control unit, issues warning information according to the instruction of control unit；
Control unit is communicated to connect with first detection unit, second detection unit；
Control unit obtains each phase voltage of bus PT secondary side and residual voltage value, the second detection by first detection unit
Unit obtains bus PT open delta voltage, and each phase voltage of bus PT secondary side, residual voltage value, bus PT are open respectively
Triangular voltages preset voltage value is compared, and instructs control fault warning unit movement according to comparison result.
Preferably, first time threshold and second time threshold are stored in control unit；
First detection unit is denoted as UA, UB, UC, U0 for acquiring each phase voltage of bus PT secondary side and residual voltage value；
Default zero-pressure definite value U1, default ground connection definite value U2, the first voltage value U3, second voltage value are stored in control unit
U4, third voltage value U5, the 4th voltage value U6, preset overpressure definite value U7, control unit obtain bus by first detection unit
Each phase voltage of PT secondary side and residual voltage value, second detection unit obtain bus PT open delta voltage, and to UA, UB, UC,
U0, UT are analyzed:
As U0 > U1, UA > U2 and/or UB > U2 and/or UC > U2, UX >=U3 and the duration of above-mentioned state is more than the
When one time threshold, control unit output ground connection abnormal results simultaneously instruct control fault warning unit to issue warning information, wherein
UX is ungrounded phase voltage value in UA, UB, UC；
Preferably, as UA+UB+UC>U4, UY<U5, UZ<U6 or UP-UQ>U6 and the duration of above-mentioned state is more than
When first time threshold, control unit output broken string abnormal results simultaneously instruct control fault warning unit to issue warning information,
In, non-broken string phase voltage value in UY UA, UB, UC, minimum amount of voltage that in UZ UA, UB, UC, maximum electricity in UP UA, UB, UC
Pressure value, minimum amount of voltage that in UQ UA, UB, UC；
Preferably, as U0 > U7, control unit output over-voltage abnormal results simultaneously instruct control fault warning unit to issue
The working time of warning information and fault warning unit is not less than second time threshold；
Preferably, second detection unit is also used to acquire bus PT open delta voltage in 17Hz, 25Hz, 50Hz, 150Hz
Component of voltage under four kinds of frequencies is denoted as U11, U12, U13, U14, and bus PT open delta voltage is stored in control unit and is existed
17Hz, 25Hz, 50Hz, 150Hz tetra- kinds of resonating at frequencies definite value U21, U22, U23, U24, work as U11 > U21 and/or U12 > U22
And/or when U13 > U23 and/or U14 > U24, control unit export resonance abnormal results simultaneously instruct control fault warning unit to issue
The working time of warning information and fault warning unit is not less than second time threshold.
It preferably, further include information display unit, information display unit and control unit communicate to connect and be used to show control
The information that unit processed is sent；
When control unit exports ground connection abnormal results, control unit will be grounded exception information and be sent to information display list
Member；
When control unit exports broken string abnormal results, broken string exception information is sent to information display list by control unit
Member；
When control unit output over-voltage abnormal results, overvoltage exception information is sent to information and shown by control unit
Unit；
When control unit export resonance abnormal results, resonance exception information is sent to information display list by control unit
Member.
It preferably, further include information memory cell, information memory cell and information display unit communicate to connect, information storage
Unit is for storing the exception information that the nearly n times of information display unit are shown；
Wherein, n is preset value.
It preferably, further include timing unit, timing unit and control unit communicate to connect；
Control unit by timing unit acquisition time information and by above-mentioned temporal information be sent to information display unit into
Row display.
Preferably, the fault warning unit includes acoustic alarm module and light alarm module；
Preferably, the fault warning unit uses combined aural and visual alarm.
Bus insulation proposed by the present invention monitors system, can pass through each phase voltage of real-time monitoring bus PT secondary side and zero
Above-mentioned numerical value is simultaneously compared by the numerical value of sequence voltage value and open delta voltage with preset voltage value, further according to comparison result
The real work situation for carrying out isolated-phase buses, when being abnormal situation, the timely output abnormality result of system simultaneously carries out abnormality alarming,
So that relevant staff understands the abnormal conditions in the bus course of work in time and takes targetedly remedial measure, guarantee female
The normal table working condition of line.
The present invention be ground fault, resonance failure, overvoltage failure and disconnection fault be provided with specific distinguishing rule and
Numerical value not only contributes to the accuracy for improving judgement, and is conducive to alert in time when failure occurs, and guarantees to work to bus
The monitoring effect of state.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of bus insulation monitors system.
Specific embodiment
As shown in FIG. 1, FIG. 1 is a kind of bus insulation monitoring systems proposed by the present invention.
Referring to Fig.1, bus insulation proposed by the present invention monitors system, comprising:
First detection unit, for acquiring each phase voltage of bus PT secondary side and residual voltage value；
Second detection unit, for acquiring bus PT open delta voltage；
Fault warning unit is communicated to connect with control unit, issues warning information according to the instruction of control unit；The event
Hindering Alarm Unit includes acoustic alarm module and light alarm module；Preferably, the fault warning unit uses combined aural and visual alarm.It is logical
It crosses in terms of the sense of hearing and vision two to relevant staff to stimulate, reminds the presence of its abnormal conditions, be conducive to it and adopt in time
Take regulating measures.
Control unit is communicated to connect with first detection unit, second detection unit；
Control unit obtains each phase voltage of bus PT secondary side and residual voltage value, the second detection by first detection unit
Unit obtains bus PT open delta voltage, and each phase voltage of bus PT secondary side, residual voltage value, bus PT are open respectively
Triangular voltages preset voltage value is compared, and instructs control fault warning unit movement according to comparison result.By supervising in real time
It surveys each phase voltage of PT secondary side and residual voltage value and bus PT open delta voltage and analyzes it, be conducive in bus
Warning information is issued when operation irregularity in time, notifies relevant staff takes targetedly to remedy scheme.
Specifically: first time threshold and second time threshold are stored in control unit；In present embodiment, when first
Between threshold value be 5s, second time threshold 10s；
First detection unit is denoted as UA, UB, UC, U0 for acquiring each phase voltage of bus PT secondary side and residual voltage value；
Default zero-pressure definite value U1, default ground connection definite value U2, the first voltage value U3, second voltage value are stored in control unit
U4, third voltage value U5, the 4th voltage value U6, preset overpressure definite value U7, control unit obtain bus by first detection unit
Each phase voltage of PT secondary side and residual voltage value, second detection unit obtain bus PT open delta voltage, and to UA, UB, UC,
U0, UT are analyzed:
As U0 > U1, UA > U2 and/or UB > U2 and/or UC > U2, UX >=U3 and the duration of above-mentioned state is more than the
When one time threshold, control unit output ground connection abnormal results simultaneously instruct control fault warning unit to issue warning information, wherein
UX is ungrounded phase voltage value in UA, UB, UC；Further, above-mentioned deterministic process need to be when grounding monitor function comes into operation
It carries out, otherwise will affect the judgement accuracy of ground fault；In present embodiment, the numerical value of U3 is 85.
Preferably, as UA+UB+UC>U4, UY<U5, UZ<U6 or UP-UQ>U6 and the duration of above-mentioned state is more than
When first time threshold, control unit output broken string abnormal results simultaneously instruct control fault warning unit to issue warning information,
In, non-broken string phase voltage value in UY UA, UB, UC, minimum amount of voltage that in UZ UA, UB, UC, maximum electricity in UP UA, UB, UC
Pressure value, minimum amount of voltage that in UQ UA, UB, UC；It should be noted that above-mentioned deterministic process needs to put into PT disconnection monitoring function
It is carried out in the case where use, advantageously ensures that the abnormal accuracy of broken string；In present embodiment, U4 numerical value is set to 18, UY numerical value
It is set to 85, U6 numerical value and is set to 20.
Preferably, as U0 > U7, control unit output over-voltage abnormal results simultaneously instruct control fault warning unit to issue
The working time of warning information and fault warning unit is not less than second time threshold；Further, above-mentioned deterministic process need to be
Over-voltage monitoring function comes into operation when progress, otherwise will affect the accuracy of overvoltage breakdown judge.
Preferably, second detection unit is also used to acquire bus PT open delta voltage in 17Hz, 25Hz, 50Hz, 150Hz
Component of voltage under four kinds of frequencies is denoted as U11, U12, U13, U14, and bus PT open delta voltage is stored in control unit and is existed
17Hz, 25Hz, 50Hz, 150Hz tetra- kinds of resonating at frequencies definite value U21, U22, U23, U24, work as U11 > U21 and/or U12 > U22
And/or when U13 > U23 and/or U14 > U24, control unit export resonance abnormal results simultaneously instruct control fault warning unit to issue
The working time of warning information and fault warning unit is not less than second time threshold；It should be noted that above-mentioned deterministic process needs
It to be carried out in the case where resonance monitoring function comes into operation, advantageously ensure that the accuracy of resonance exception.
It, will be in ground fault, PT disconnection fault, resonance failure, the judgment basis of overvoltage failure in present embodiment
Project is equipped with predetermined value, and the accuracy to above-mentioned malfunction monitoring can be improved, and guarantees to be alerted in time when failure occurs.
Further, present embodiment further includes information display unit, and information display unit and control unit communicate to connect
And the information sent for display control unit；
When control unit exports ground connection abnormal results, control unit will be grounded exception information and be sent to information display list
Member；
When control unit exports broken string abnormal results, broken string exception information is sent to information display list by control unit
Member；
When control unit output over-voltage abnormal results, overvoltage exception information is sent to information and shown by control unit
Unit；
When control unit export resonance abnormal results, resonance exception information is sent to information display list by control unit
Member；
In this way, relevant staff can be according to the concrete type for the information inspection failure that information display unit is shown, favorably
Effectively adjustable strategies are taken for the type of failure in it, guarantee the normal operating conditions of bus.
Present embodiment further includes information memory cell, and information memory cell and information display unit communicate to connect, information
Storage unit is for storing the exception information that the nearly n times of information display unit are shown；Wherein, n is preset value.By different to nearly n times
The recording and storage of normal information, facilitates related technical personnel to be monitored and adjust the working condition of bus, general warranty its
The safety and stability of work reduces abnormal and dangerous a possibility that occurring.
Present embodiment further includes timing unit, and timing unit and control unit communicate to connect；
Control unit by timing unit acquisition time information and by above-mentioned temporal information be sent to information display unit into
Row display, facilitates staff to check the time.
The bus insulation that present embodiment proposes monitors system, can pass through each phase voltage of real-time monitoring bus PT secondary side
It is compared with the numerical value of residual voltage value and open delta voltage and by above-mentioned numerical value with preset voltage value, further according to comparing
As a result the real work situation for carrying out isolated-phase buses, when being abnormal situation, the timely output abnormality result of system simultaneously carries out exception
Alarm, so that relevant staff understands the abnormal conditions in the bus course of work in time and takes targetedly remedial measure,
Guarantee the normal table working condition of bus.
Present embodiment be ground fault, resonance failure, overvoltage failure and disconnection fault be provided with it is specific differentiate according to
According to and numerical value, not only contribute to improve judgement accuracy, and be conducive to failure occur when alert in time, guarantee to bus
The monitoring effect of working condition.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of bus insulation monitors system characterized by comprising
First detection unit, for acquiring each phase voltage of bus PT secondary side and residual voltage value；
Second detection unit, for acquiring bus PT open delta voltage；
Fault warning unit is communicated to connect with control unit, issues warning information according to the instruction of control unit；
Control unit is communicated to connect with first detection unit, second detection unit；
Control unit obtains each phase voltage of bus PT secondary side and residual voltage value, second detection unit by first detection unit
Bus PT open delta voltage is obtained, and respectively by each phase voltage of bus PT secondary side, residual voltage value, bus PT open delta
Voltage preset voltage value is compared, and instructs control fault warning unit movement according to comparison result；
First time threshold and second time threshold are stored in control unit；
First detection unit is denoted as UA, UB, UC, U0 for acquiring each phase voltage of bus PT secondary side and residual voltage value；
Be stored in control unit default zero-pressure definite value U1, default ground connection definite value U2, the first voltage value U3, second voltage value U4,
Third voltage value U5, the 4th voltage value U6, preset overpressure definite value U7, control unit obtain bus PT bis- by first detection unit
Each phase voltage in secondary side and residual voltage value, second detection unit obtain bus PT open delta voltage, and to UA, UB, UC, U0,
UT is analyzed:
As U0 > U1, UA > U2 and/or UB > U2 and/or UC > U2, UX >=U3 and when the duration of above-mentioned state is more than first
Between threshold value when, control unit output ground connection abnormal results simultaneously instruct control fault warning unit to issue warning information, wherein UX is
Ungrounded phase voltage value in UA, UB, UC.
2. bus insulation according to claim 1 monitors system, which is characterized in that work as UA+UB+UC>U4, UY<U5, UZ<
When U6 or UP-UQ > U6 and when the duration of above-mentioned state is more than first time threshold, control unit output broken string abnormal results
And control fault warning unit is instructed to issue warning information, wherein non-broken string phase voltage value in UY UA, UB, UC, UZ UA,
Minimum amount of voltage that in UB, UC, maximum voltage value in UP UA, UB, UC, minimum amount of voltage that in UQ UA, UB, UC.
3. bus insulation according to claim 2 monitors system, which is characterized in that as U0 > U7, control unit was exported
Electric voltage exception result simultaneously instructs the working time of control fault warning unit sending warning information and fault warning unit to be not less than
Second time threshold.
4. bus insulation according to claim 3 monitors system, which is characterized in that second detection unit is also used to acquire mother
Component of voltage of the line PT open delta voltage under tetra- kinds of frequencies of 17Hz, 25Hz, 50Hz, 150Hz, be denoted as U11, U12, U13,
It is fixed in tetra- kinds of resonating at frequencies of 17Hz, 25Hz, 50Hz, 150Hz to be stored with bus PT open delta voltage in control unit by U14
Value U21, U22, U23, U24, as U11 > U21 and/or U12 > U22 and/or U13 > U23 and/or U14 > U24, control unit is defeated
The resonance abnormal results and working time for instructing control fault warning unit to issue warning information and fault warning unit is not low out
In second time threshold.
5. bus insulation according to claim 4 monitors system, which is characterized in that further include information display unit, information
Display unit and control unit communicate to connect and are used for the information of display control unit transmission；
When control unit exports ground connection abnormal results, control unit is sent to information display unit for exception information is grounded；
When control unit exports broken string abnormal results, broken string exception information is sent to information display unit by control unit；
When control unit output over-voltage abnormal results, overvoltage exception information is sent to information display list by control unit
Member；
When control unit export resonance abnormal results, resonance exception information is sent to information display unit by control unit.
6. bus insulation according to claim 5 monitors system, which is characterized in that further include information memory cell, information
Storage unit and information display unit communicate to connect, information memory cell for store the nearly n times of information display unit show it is different
Normal information；
Wherein, n is preset value.
7. bus insulation according to claim 5 monitors system, which is characterized in that further include timing unit, timing unit
It is communicated to connect with control unit；
Control unit, which passes through timing unit acquisition time information and above-mentioned temporal information is sent to information display unit, to be shown
Show.
8. bus insulation according to claim 1 monitors system, which is characterized in that the fault warning unit includes sound report
Alert module and light alarm module.
9. bus insulation according to claim 8 monitors system, which is characterized in that the fault warning unit uses acousto-optic
Alarm.
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| CN201710432493.XA CN107132464B (en) | 2017-06-09 | 2017-06-09 | A kind of bus insulation monitoring system |
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|---|---|---|---|
| CN201710432493.XA CN107132464B (en) | 2017-06-09 | 2017-06-09 | A kind of bus insulation monitoring system |
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| CN107132464B true CN107132464B (en) | 2019-09-17 |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2957187B2 (en) * | 1989-01-11 | 1999-10-04 | 日新電機株式会社 | Secondary circuit disconnection detector for instrument transformer |
| CN102004205A (en) * | 2010-09-16 | 2011-04-06 | 广元电业局 | Judging methods of single phase-to-earth fault and resonance overvoltage fault in small current grounding system |
| CN102243283A (en) * | 2011-04-02 | 2011-11-16 | 宁波电业局 | Neutral line breakage detection method of voltage secondary loop and apparatus thereof |
| CN204462305U (en) * | 2015-03-16 | 2015-07-08 | 王金泽 | A kind of distribution line disconnection monitor based on electric current and voltage vector |
| CN105137285A (en) * | 2015-08-28 | 2015-12-09 | 广东中钰科技股份有限公司 | Power distribution network grounding fault line selection method and system |
| CN105572542A (en) * | 2016-01-19 | 2016-05-11 | 国网福建省电力有限公司 | 10kV feed line fault monitoring terminal based on ethernet |
| CN106597188B (en) * | 2016-11-16 | 2019-01-08 | 安徽合凯电气科技股份有限公司 | Single-phase earth fault discrimination method under cable, aerial and mixed connection route |
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Effective date of registration: 20221208 Address after: 226463 Zhongtian Industrial Park, Hekou Town, Rudong, Nantong, Jiangsu Patentee after: ZHONGTIAN BROADBAND TECHNOLOGY Co.,Ltd. Address before: Room 206, Electronic Building, Anhui University Science and Technology Park, No. 2 Tianda Road, High-tech Zone, Hefei City, Anhui Province, 230000 Patentee before: HEFEI YUANJIAN ELECTRIC POWER TECHNOLOGY Co.,Ltd. |