CN109116285A - A kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition - Google Patents
A kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition Download PDFInfo
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- CN109116285A CN109116285A CN201810961507.1A CN201810961507A CN109116285A CN 109116285 A CN109116285 A CN 109116285A CN 201810961507 A CN201810961507 A CN 201810961507A CN 109116285 A CN109116285 A CN 109116285A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
本发明提供了一种基于多种信号采集的电容式电压互感器带电检测装置，所述带电检测装置包括信号采集单元、信号调理单元、A/D转换单元、中央控制处理单元、存储单元、显示单元和按键输入单元；所述带电检测装置采集所述电容式电压互感器带电工作时的相关参数，经过分析计算后判断所述电容式电压互感器工作是否正常，若有故障能够及时发出报警信号以便相关工作人员采取必要的措施。本发明提供一种基于多种信号采集的电容式电压互感器带电检测装置，能够有效准确的检测电压互感器内部线圈短路故障和介质损耗状态。
The invention provides a capacitive voltage transformer live detection device based on multiple signal acquisition, the live detection device includes a signal acquisition unit, a signal conditioning unit, an A/D conversion unit, a central control processing unit, a storage unit, a display unit, and a display unit. unit and key input unit; the live detection device collects the relevant parameters of the capacitive voltage transformer when it is working with electricity, and judges whether the capacitive voltage transformer is working normally after analysis and calculation, and can issue an alarm signal in time if there is a fault so that the relevant staff can take the necessary measures. The invention provides a capacitive voltage transformer live detection device based on multiple signal acquisition, which can effectively and accurately detect the short-circuit fault and dielectric loss state of the internal coil of the voltage transformer.
Description
Technical field
The invention belongs to technical field of electric power detection, in particular to a kind of capacitor voltage based on multi-signal acquisition is mutual
Sensor measuring device with electricity.
Background technique
With the continuous development of power technology, higher and higher, condenser type is required to the safety and reliability of electric system
Voltage transformer is one of the important equipment of protecting electrical power system and metrical information acquisition.As capacitance type potential transformer is in electricity
In Force system using more and more extensive, capacitance type potential transformer state-detection is also gradually paid attention to, at present to condenser type
The detection method of voltage transformer mainly has: interruption maintenance, equipment-patrolling, live detection and on-line monitoring.Existing band electric-examination
Survey method is mainly used for the fault detections such as shelf depreciation and temperature raising, cannot effective accurate detection voltage transformer inner wire
Enclose short trouble and dielectric loss state.
Summary of the invention
The present invention provides a kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition, can be effective
Accurate detection voltage transformer Inside coil short trouble and dielectric loss state.
The present invention is specially a kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition, the band
Electric detection means includes signal acquisition unit, signal conditioning unit, A/D converting unit, central control processing unit, storage list
Member, display unit and key-press input unit, the signal acquisition unit, the signal conditioning unit, the A/D converting unit and
The central control processing unit is linked in sequence, the central control processing unit also respectively with the storage unit, described aobvious
Show that unit is connected with the key-press input unit；The measuring device with electricity acquires the capacitance type potential transformer band electrician
Relevant parameter when making judges whether the capacitance type potential transformer work is normal, if faulty energy after being calculated analytically
It is enough to issue alarm signal necessary measure so that relevant staff takes in time.
The key-press input unit completes the capacitance type potential transformer in conjunction with the storage unit, the display unit
The input of factory state parameter.
The signal acquisition unit mainly acquires capacitance type potential transformer primary side input voltage, secondary side output electricity
It presses, flow through capacitive divider electric current and flow through middle piezoelectricity magnetic cell electric current, the primary side input voltage is using decompression mutual inductor
Acquisition, the secondary side output voltage is directly acquired from the capacitance type potential transformer secondary side, described to flow through capacitance partial pressure
It device electric current and described flow through middle piezoelectricity magnetic cell electric current and is acquired using current transformer.
The signal conditioning unit includes signal amplification module and signal filter module, and the signal amplification module uses
AD706 operational amplifier can as needed be adjusted amplification factor；The filter module uses two-stage low-pass wave
Device effectively inhibits high-frequency harmonic, it is ensured that output signal meets the A/D converting unit working range by filtering twice.
The central control processing unit carries out analytical calculation to the signal of acquisition, and then judges that the capacitor voltage is mutual
Whether sensor breaks down:
If the secondary side output voltage becomes larger with the primary side input voltage ratio, the capacitor voltage mutual inductance
Breakdown or intermediate transformer primary coil partial short circuit failure occur for device high-voltage capacitance unit；
If the secondary side output voltage becomes smaller with the primary side input voltage ratio, the capacitor voltage mutual inductance
Breakdown or the intermediate transformer secondary coil partial short circuit failure occur for voltage capacitance unit in device；
If the secondary side output voltage and the primary side input voltage phase angle difference become smaller or described flow through capacitance partial pressure
Device electric current and it is described flow through middle piezoelectricity magnetic cell current ratio and become smaller, then dielectric loss occurs for the capacitance type potential transformer.
Detailed description of the invention
Fig. 1 is that a kind of structure of the capacitance type potential transformer measuring device with electricity based on multi-signal acquisition of the present invention is shown
It is intended to.
Specific embodiment
The capacitance type potential transformer live detection based on multi-signal acquisition a kind of to the present invention fills with reference to the accompanying drawing
The specific embodiment set elaborates.
As shown in Figure 1, measuring device with electricity of the invention includes signal acquisition unit, signal conditioning unit, A/D conversion list
Member, central control processing unit, storage unit, display unit and key-press input unit, the signal acquisition unit, the signal
Conditioning unit, the A/D converting unit and the central control processing unit are linked in sequence, and the central control processing unit is also
It is connected respectively with the storage unit, the display unit and the key-press input unit；The measuring device with electricity acquisition
Relevant parameter when the capacitance type potential transformer live line work judges the capacitor voltage mutual inductance after being calculated analytically
Whether device work is normal, if faulty can issue alarm signal necessary measure so that relevant staff takes in time.
The key-press input unit completes the capacitance type potential transformer in conjunction with the storage unit, the display unit
The input of factory state parameter.
The signal acquisition unit mainly acquires capacitance type potential transformer primary side input voltage, secondary side output electricity
It presses, flow through capacitive divider electric current and flow through middle piezoelectricity magnetic cell electric current, the primary side input voltage is using decompression mutual inductor
Acquisition, the secondary side output voltage is directly acquired from the capacitance type potential transformer secondary side, described to flow through capacitance partial pressure
It device electric current and described flow through middle piezoelectricity magnetic cell electric current and is acquired using current transformer.
The signal conditioning unit includes signal amplification module and signal filter module, and the signal amplification module uses
AD706 operational amplifier can as needed be adjusted amplification factor；The filter module uses two-stage low-pass wave
Device effectively inhibits high-frequency harmonic, it is ensured that output signal meets the A/D converting unit working range by filtering twice.
The central control processing unit carries out analytical calculation to the signal of acquisition, and then judges that the capacitor voltage is mutual
Whether sensor breaks down:
If the secondary side output voltage becomes larger with the primary side input voltage ratio, the capacitor voltage mutual inductance
Breakdown or intermediate transformer primary coil partial short circuit failure occur for device high-voltage capacitance unit；
If the secondary side output voltage becomes smaller with the primary side input voltage ratio, the capacitor voltage mutual inductance
Breakdown or the intermediate transformer secondary coil partial short circuit failure occur for voltage capacitance unit in device；
If the secondary side output voltage and the primary side input voltage phase angle difference become smaller or described flow through capacitance partial pressure
Device electric current and it is described flow through middle piezoelectricity magnetic cell current ratio and become smaller, then dielectric loss occurs for the capacitance type potential transformer.
Finally it should be noted that only illustrating technical solution of the present invention rather than its limitations in conjunction with above-described embodiment.Institute
The those of ordinary skill in category field is it is to be understood that those skilled in the art can repair a specific embodiment of the invention
Change or equivalent replacement, but these modifications or change are being applied among pending claims.
Claims (5)
1. a kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition, which is characterized in that the electrification
Detection device include signal acquisition unit, signal conditioning unit, A/D converting unit, central control processing unit, storage unit,
Display unit and key-press input unit, the signal acquisition unit, the signal conditioning unit, the A/D converting unit and institute
State central control processing unit sequential connection, the central control processing unit also respectively with the storage unit, the display
Unit is connected with the key-press input unit；The measuring device with electricity acquires the capacitance type potential transformer live line work
When relevant parameter, judge whether capacitance type potential transformer work normal after being calculated analytically, if faulty can
Alarm signal necessary measure so that relevant staff takes is issued in time.
2. a kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition according to claim 1,
It is characterized in that, the key-press input unit is mutual in conjunction with the storage unit, the display unit completion capacitor voltage
The input of sensor factory state parameter.
3. a kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition according to claim 2,
It is characterized in that, the signal acquisition unit mainly acquires capacitance type potential transformer primary side input voltage, secondary side output
Voltage flows through capacitive divider electric current and flows through middle piezoelectricity magnetic cell electric current, and the primary side input voltage is using decompression mutual inductance
Device acquisition, the secondary side output voltage are directly acquired from the capacitance type potential transformer secondary side, described to flow through capacitor point
It depressor electric current and described flow through middle piezoelectricity magnetic cell electric current and is acquired using current transformer.
4. a kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition according to claim 3,
It is characterized in that, the signal conditioning unit includes signal amplification module and signal filter module, the signal amplification module is adopted
With AD706 operational amplifier, amplification factor can be adjusted as needed；The filter module uses two-stage low-pass wave
Device effectively inhibits high-frequency harmonic, it is ensured that output signal meets the A/D converting unit working range by filtering twice.
5. a kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition according to claim 4,
It is characterized in that, the central control processing unit carries out analytical calculation to the signal of acquisition, and then judge the capacitive battery
Whether pressure mutual inductor breaks down:
If the secondary side output voltage becomes larger with the primary side input voltage ratio, the capacitance type potential transformer is high
Breakdown or intermediate transformer primary coil partial short circuit failure occur for voltage capacitance unit；
If the secondary side output voltage becomes smaller with the primary side input voltage ratio, in the capacitance type potential transformer
Breakdown or the intermediate transformer secondary coil partial short circuit failure occur for voltage capacitance unit；
If the secondary side output voltage and the primary side input voltage phase angle difference become smaller or described flow through capacitive divider electricity
Stream and it is described flow through middle piezoelectricity magnetic cell current ratio and become smaller, then dielectric loss occurs for the capacitance type potential transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810961507.1A CN109116285B (en) | 2018-08-22 | 2018-08-22 | A capacitive voltage transformer live detection device based on multiple signal acquisition |
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| CN201810961507.1A CN109116285B (en) | 2018-08-22 | 2018-08-22 | A capacitive voltage transformer live detection device based on multiple signal acquisition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361686A (en) * | 2019-08-28 | 2019-10-22 | 华北电力大学（保定） | Capacitance type potential transformer fault detection method based on multi-parameter |
| CN114113944A (en) * | 2021-11-25 | 2022-03-01 | 广东电网有限责任公司 | CVT capacitor unit breakdown defect test method and device |
| CN118226366A (en) * | 2024-05-22 | 2024-06-21 | 深圳友讯达科技股份有限公司 | Online monitoring method, device and equipment of voltage transformer and storage medium |
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| CN209148863U (en) * | 2018-08-22 | 2019-07-23 | 国网江苏省电力有限公司盐城供电分公司 | A capacitive voltage transformer live detection device based on multiple signal acquisition |
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| CN110361686A (en) * | 2019-08-28 | 2019-10-22 | 华北电力大学（保定） | Capacitance type potential transformer fault detection method based on multi-parameter |
| CN114113944A (en) * | 2021-11-25 | 2022-03-01 | 广东电网有限责任公司 | CVT capacitor unit breakdown defect test method and device |
| CN114113944B (en) * | 2021-11-25 | 2023-10-20 | 广东电网有限责任公司 | CVT capacitor unit breakdown defect test method and device |
| CN118226366A (en) * | 2024-05-22 | 2024-06-21 | 深圳友讯达科技股份有限公司 | Online monitoring method, device and equipment of voltage transformer and storage medium |
| CN118226366B (en) * | 2024-05-22 | 2024-08-06 | 深圳友讯达科技股份有限公司 | Online monitoring method, device and equipment of voltage transformer and storage medium |
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| CN109116285B (en) | 2025-01-17 |
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