CN201945681U - Online monitoring device for capacitor voltage transformer - Google Patents
Online monitoring device for capacitor voltage transformer Download PDFInfo
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- CN201945681U CN201945681U CN2010206745937U CN201020674593U CN201945681U CN 201945681 U CN201945681 U CN 201945681U CN 2010206745937 U CN2010206745937 U CN 2010206745937U CN 201020674593 U CN201020674593 U CN 201020674593U CN 201945681 U CN201945681 U CN 201945681U
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- 239000003990 capacitor Substances 0.000 title abstract description 5
- 238000012806 monitoring device Methods 0.000 title abstract description 5
- 238000004891 communication Methods 0.000 claims abstract description 10
- 230000003321 amplification Effects 0.000 claims description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to an online monitoring device for a capacitor voltage transformer, which comprises an MCU (micro control unit), a voltage signal acquisition amplifying module, a GPS (global position system) module, a wireless communication module and a memory. The MCU is connected with the voltage signal acquisition amplifying module, the GPS module, the wireless communication module and the memory respectively. The voltage signal acquisition amplifying module is connected with a secondary side of the capacitor voltage transformer. Compared with the prior art, the online monitoring device for the capacitor voltage transformer has the advantages of having stable and effective data for a detection of a CVT (constant-voltage transformer) secondary side voltage, and being difficult to affect by a live electromagnetic interference.
Description
Technical field
The utility model relates to a kind of on-line monitoring system, especially relates to a kind of on-Line Monitor Device that is used for capacitance type potential transformer.
Background technology
Capacitance type potential transformer is to extract voltage by series capacitor, again through the voltage transformer (VT) of transformer transformation as the voltage source of table meter, relay protection etc.Capacitance type potential transformer is used widely in 220kV and above transmission system with its function admirable, advantage such as with low cost.But owing to reasons such as design, manufacturing and materials, the electromagnetic unit fault among the CVT, capacity cell breakdown fault and electric capacity problem such as change happens occasionally in capacitance type potential transformer.
Domestic rolling inspection project to CVT is generally less at present, mainly is confined to the CVT visual examination and makes an inspection tour and observe the voltage indication.Visual examination is maked an inspection tour finding seepage wet goods fault more effective, but for finding the internal fault DeGrain; The voltage of observation in service is indicated the system's primary voltage instantaneous value that shows on the monitor screen normally, and is line voltage mostly.When the CVT fault causes voltage die to be zero, observe the easy discovery of voltage indication or send alerting signal by protective device.Often be not difficult to for a long time find and cause the fault phase voltage to descend for fault.In addition, the on-the-spot capacitive apparatus on-Line Monitor Device that also has CVT to go up and install, main monitoring equipment capacitance value and leakage current numerical value.But test value is subjected to the influence of on-the-spot electromagnetic interference (EMI) and external environment condition easily, causes the test data instability, easily produces error.Therefore develop the CVT fault monitoring device, find the CVT internal fault early, prevent that fault progression expansion from causing equipment breakdown, reduce equipment breakdown and failure rate, be significant.
The utility model content
The purpose of this utility model is exactly to provide a kind of on-Line Monitor Device that is used for capacitance type potential transformer for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of on-Line Monitor Device that is used for capacitance type potential transformer, it is characterized in that, comprise MCU, voltage signal acquisition amplification module, GPS module, wireless communication module, storer, described MCU is connected with voltage signal acquisition amplification module, GPS module, wireless communication module, storer respectively, and described voltage signal acquisition amplification module is connected with the secondary side of capacitance type potential transformer.
Described voltage signal acquisition amplification module comprises that air switch, holding circuit, nothing differ amplifying circuit, and described air switch, holding circuit, nothing differ amplifying circuit and connect successively.
Described storer is the power down storer.
Described holding circuit comprises resistance R 12, the first fusible link R11, the second fusible link R15, gas-discharge tube D4, isolates current transformer U7; after connecting successively, described resistance R 12, the first fusible link R11 be connected with input 1 end of isolating current transformer U7; the described second fusible link R15 is connected with input 2 ends of isolating current transformer U7, and described gas-discharge tube D4 two ends are connected on respectively between input 1 end and input 2 ends of isolating current transformer U7.
Described nothing differs amplifying circuit and comprises resistance R 13, gas-discharge tube D4, amplifier, is connected on output terminal, the amplifier input terminal of isolating current transformer U7 after described resistance R 13, the gas-discharge tube D4 parallel connection respectively.
Compared with prior art, the utlity model has following advantage:
1, voltage signal is obtained from the secondary side of CVT, is directly connected on the air switch in the equipment, and signal demand differs the degree of accuracy that amplification knot circuit guarantees personnel's device security and measurement through holding circuit and nothing.
2, the GPS module provides the precise time of measurement, with preservation of data, can be used for historical data analysis.
3, wireless communication module can carry out data transmission with upper instrument, simultaneously can be by the address of toggle switch switching device shifter.
4, an external FLASH storer is used for the power down maintenance of monitoring system.
5, monitoring CVT secondary side voltage data is effectively stable, and is not vulnerable to the influence of on-the-spot electromagnetic interference (EMI).
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the electrical block diagram of voltage signal acquisition amplification module of the present utility model;
Fig. 3 is that the address of wireless communication module of the present utility model is selected circuit diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 1, a kind of on-Line Monitor Device that is used for capacitance type potential transformer, comprise MCU3, voltage signal acquisition amplification module, GPS module 5, wireless communication module 6, power down storer 4, described MCU3 is connected with voltage signal acquisition amplification module, GPS module 5, wireless communication module 6, power down storer 4 respectively, and described voltage signal acquisition amplification module is connected with the secondary side of capacitance type potential transformer.
Described voltage signal acquisition amplification module comprises that air switch, holding circuit 1, nothing differ amplifying circuit 2, and described air switch, holding circuit 1, nothing differ amplifying circuit 2 and connect successively.
As shown in Figure 2; described holding circuit comprises resistance R 12, the first fusible link R11, the second fusible link R15, gas-discharge tube D4, isolates current transformer U7; after connecting successively, described resistance R 12, the first fusible link R11 be connected with input 1 end of isolating current transformer U7; the described second fusible link R15 is connected with input 2 ends of isolating current transformer U7, and described gas-discharge tube D4 two ends are connected on respectively between input 1 end and input 2 ends of isolating current transformer U7.Described nothing differs amplifying circuit and comprises resistance R 13, gas-discharge tube D4, amplifier, is connected on output terminal, the amplifier input terminal of isolating current transformer U7 after described resistance R 13, the gas-discharge tube D4 parallel connection respectively.Voltage signal inserts by air switch from the CVT secondary side, and R12 is converted into current signal with voltage signal by precision resistance.Big electric current to occur in order preventing to hinder for some reason, to have added two rapid fuses as protection.Add gas-discharge tube and damage device in case big voltage fluctuation appears in the CVT secondary side.Current signal is sent into amplifying circuit by 1: 1 isolation current transformer, and the ground of ground in the measuring system and CVT secondary side is separated, to reduce clutter and interference.The current signal of isolating transformer secondary transfers voltage signal, input amplifier to once more by resistance.Two input ends at amplifier have all added ground circuit, with stablizing of sustaining voltage signal.
In a transformer station, a plurality of CVT monitoring devices can be installed,, need to give the different different addresses of equipment in order when measuring, to distinguish to different equipment with data download.Address is selected circuit as shown in Figure 3.The function of address selection is finished by one 4 toggle switch.
CVT sends into the MCU processing after gathering voltage data, if the imbalance of three-phase voltage situation acquires a certain degree, the utility model just sends alerting signal, if imbalance reaches 100%, the situation that phase shortage promptly occurs, the utility model can send another kind of alerting signal.After each the measurement voltage in three phases signal is added the markers that obtains from GPS, store FLASH inside into, can upload to upper machine, also can be used for historical data analysis.
Claims (5)
1. on-Line Monitor Device that is used for capacitance type potential transformer, it is characterized in that, comprise MCU, voltage signal acquisition amplification module, GPS module, wireless communication module, storer, described MCU is connected with voltage signal acquisition amplification module, GPS module, wireless communication module, storer respectively, and described voltage signal acquisition amplification module is connected with the secondary side of capacitance type potential transformer.
2. a kind of on-Line Monitor Device that is used for capacitance type potential transformer according to claim 1; it is characterized in that; described voltage signal acquisition amplification module comprises that air switch, holding circuit, nothing differ amplifying circuit, and described air switch, holding circuit, nothing differ amplifying circuit and connect successively.
3. a kind of on-Line Monitor Device that is used for capacitance type potential transformer according to claim 1 is characterized in that described storer is the power down storer.
4. a kind of on-Line Monitor Device that is used for capacitance type potential transformer according to claim 1; it is characterized in that; described holding circuit comprises resistance (R12); first fusible link (R11); second fusible link (R15); gas-discharge tube (D4); isolate current transformer (U7); described resistance (R12); after connecting successively, first fusible link (R11) is connected with input 1 end of isolating current transformer (U7); described second fusible link (R15) is connected with input 2 ends of isolating current transformer (U7), and described gas-discharge tube (D4) two ends are connected on respectively between input 1 end and input 2 ends of isolating current transformer (U7).
5. a kind of on-Line Monitor Device that is used for capacitance type potential transformer according to claim 1, it is characterized in that, described nothing differs amplifying circuit and comprises resistance (R13), gas-discharge tube (D4), amplifier, is connected on output terminal, the amplifier input terminal of isolating current transformer (U7) after described resistance (R13), gas-discharge tube (D4) parallel connection respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206745937U CN201945681U (en) | 2010-12-22 | 2010-12-22 | Online monitoring device for capacitor voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206745937U CN201945681U (en) | 2010-12-22 | 2010-12-22 | Online monitoring device for capacitor voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201945681U true CN201945681U (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206745937U Expired - Fee Related CN201945681U (en) | 2010-12-22 | 2010-12-22 | Online monitoring device for capacitor voltage transformer |
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| Country | Link |
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| CN (1) | CN201945681U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545151A (en) * | 2010-12-22 | 2012-07-04 | 上海市电力公司 | On-line monitoring system for capacitor voltage transformer |
| CN102680766A (en) * | 2012-05-07 | 2012-09-19 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit for control and protection switches |
| CN102879630A (en) * | 2012-09-17 | 2013-01-16 | 浙江省电力公司电力科学研究院 | Capacitive voltage transformer failure monitoring instrument |
| CN105004945A (en) * | 2015-06-26 | 2015-10-28 | 广东电网有限责任公司东莞供电局 | Power distribution network overhead line accurate load distribution on-line monitoring method and system |
| CN105388444A (en) * | 2015-12-28 | 2016-03-09 | 武汉大学 | Harmonic wave measuring and correcting method for capacitor voltage transformer through transformation ratio fitting |
| CN108459295A (en) * | 2018-04-25 | 2018-08-28 | 国网山西省电力公司计量中心 | CVT on-line monitoring systems and method based on distributed data acquisition processing |
| CN110702973A (en) * | 2019-10-14 | 2020-01-17 | 四川国信慧通电气技术有限公司 | Online measuring device for induced voltage of cable sheath |
| CN112485746A (en) * | 2020-11-20 | 2021-03-12 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Wireless transmission system for secondary signals of alternating current-direct current high-voltage divider |
-
2010
- 2010-12-22 CN CN2010206745937U patent/CN201945681U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545151A (en) * | 2010-12-22 | 2012-07-04 | 上海市电力公司 | On-line monitoring system for capacitor voltage transformer |
| CN102680766A (en) * | 2012-05-07 | 2012-09-19 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit for control and protection switches |
| CN102879630A (en) * | 2012-09-17 | 2013-01-16 | 浙江省电力公司电力科学研究院 | Capacitive voltage transformer failure monitoring instrument |
| CN105004945A (en) * | 2015-06-26 | 2015-10-28 | 广东电网有限责任公司东莞供电局 | Power distribution network overhead line accurate load distribution on-line monitoring method and system |
| CN105388444A (en) * | 2015-12-28 | 2016-03-09 | 武汉大学 | Harmonic wave measuring and correcting method for capacitor voltage transformer through transformation ratio fitting |
| CN105388444B (en) * | 2015-12-28 | 2018-03-27 | 武汉大学 | The capacitance type potential transformer harmonic measure bearing calibration being fitted using no-load voltage ratio |
| CN108459295A (en) * | 2018-04-25 | 2018-08-28 | 国网山西省电力公司计量中心 | CVT on-line monitoring systems and method based on distributed data acquisition processing |
| CN108459295B (en) * | 2018-04-25 | 2019-05-10 | 国网山西省电力公司计量中心 | CVT on-line monitoring system and method based on distributed data acquisition processing |
| CN110702973A (en) * | 2019-10-14 | 2020-01-17 | 四川国信慧通电气技术有限公司 | Online measuring device for induced voltage of cable sheath |
| CN112485746A (en) * | 2020-11-20 | 2021-03-12 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Wireless transmission system for secondary signals of alternating current-direct current high-voltage divider |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA SHANGHAI JIULONG E Free format text: FORMER OWNER: SHANGHAI ZHONGQU ENERGY-SAVING TECHNOLOGY CO. LTD. SHANGHAI JIAOTONG UNIVERSITY Effective date: 20121210 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121210 Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Patentee after: Shanghai Electric Power Corporation Patentee after: State Grid Corporation of China Patentee after: SHANGHAI JIULONG ENTERPRISE MANAGEMENT CONSULTING CO., LTD. Patentee after: Shanghai Jiao Tong University Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Patentee before: Shanghai Electric Power Corporation Patentee before: Shanghai Zhongqu Electric Energy Saving Technology Co., Ltd. Patentee before: Shanghai Jiao Tong University |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20191222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |