CN201974466U - Sampling device for intruding wave current in substation - Google Patents
Sampling device for intruding wave current in substation Download PDFInfo
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- CN201974466U CN201974466U CN 201120003168 CN201120003168U CN201974466U CN 201974466 U CN201974466 U CN 201974466U CN 201120003168 CN201120003168 CN 201120003168 CN 201120003168 U CN201120003168 U CN 201120003168U CN 201974466 U CN201974466 U CN 201974466U
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- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
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Abstract
A sampling device for intruding wave current in a substation comprises a Rogowski coil measurement module, a signal regulation module, an analog-to-digital conversion module, a clock control module, a data processing module, a data memory and a power supply system. A Rogowski coil is a sensor for measuring the device and the Rogowski coil measurement module comprises the Rogowski coil and an integrator. The signal regulation module is composed of a TVS tube and an operation amplifier chip LM353. The analog-to-digital conversion module includes a chip AD9238. An active crystal oscillator with 10 MHz is employed by the clock control module for controlling a sampling rate of a signal. The data processing module comprises a chip EP1C144C8 and belongs to a programmable module. The data memory includes IS61LV1024 for storing sampling signals. A transmission interface chip has a function of data transmission.
Description
Technical field
The utility model relates to transformer station current monitoring field, is specifically related to invade in the transformer station under the voltage levels a certain circuit branch response current sampling apparatus under the ripple superpotential.
Background technology
It is the major reason that causes the substation equipment fault that transformer station's thunder and lightning is invaded ripple.Along with the developing rapidly of electrical network, extra high voltage network returns the rapid increase of number, length and electric substation's quantity in recent years, invades isolating switch or the breakdown accident of mutual inductor built-in electrical insulation that ripple causes in China's thunderbolt prone areas because of thunder and lightning and happens occasionally.It also is the apparatus insulated key factor of deterioration that thunder and lightning is invaded ripple, and thunder and lightning is invaded ripple and all can be caused one-shot to the insulating property of relevant device each time, and this cumulative effect is the insulation of deterioration equipment progressively.
As seen, effectively invade the ripple electric current in the monitoring substation, lay the foundation for invading the ripple over-voltage monitoring in the transformer station, for record and analysis, the assessment apparatus insulation degradation level of accident, help to improve apparatus insulated cooperation level, and then improve safe operation of electric network and be significant.Yet because the restriction of Sampling techniques, the high-speed sampling module triggers and constantly can cause triggering losing of preceding Wave data, is unfavorable for accurate and effective record intrusion ripple electric current.
Summary of the invention
In order to remedy in the above electric pressure of the 110kV transformer station invading the vacancy of ripple current monitoring aspect, the utility model provides a kind of transformer station to invade the ripple current monitoring device, and this device can be realized transformer station is invaded the complete sampling of ripple electric current.
The technical scheme that its technical matters that solves the utility model adopts is: this device comprises Luo-coil measurement module, signal condition module, analog-to-digital conversion module, clock control module, data processing module, data-carrier store, power-supply system.Luo-coil is the sensor of measurement mechanism, comprises Luo-coil and integrator.The signal condition module is made of TVS pipe, diode, amplifier chip LM353.Analog-to-digital conversion module is made of chip AD9238.Clock adopts the active crystal oscillator of 10MHz, the sampling rate of control signal.Data processing module is made of chip EP1C144C8, belongs to programmable module.Data-carrier store is made of IS61LV1024, the store sample signal.The transmission interface chip is finished the function of data transmission.The Luo-coil measurement module is contained on the circuit branch that needs monitoring, if institute's monitoring branch road is normally operation under power frequency, after handling via signal condition module, digital-to-analogue conversion module, the current value that the Luo-coil measurement module is measured is stored in the internal memory of depositing 1000 data that data-carrier store opens up, data before then covering when surpassing 1000 data realize circulating sampling.When the branch road of being monitored occurs invading the ripple electric current, FPGA starts triggering in the data processing module, data are kept in the internal memory of depositing 3000 data that data-carrier store opens up in addition, 1000 data before the FPGA triggering and after triggering 3000 integrated at last, be and invade ripple full current data, finish the transmission of data by the transmission interface chip.
The beneficial effects of the utility model are, realized that the above electric pressure of 110kV transformer station invades the complete monitoring of ripple electric current, avoided because trigger the loss of data that constantly causes, and the Luo-coil current measuring device that installs additional is simple in structure, volume is small and exquisite, utilize the electromagnetic field couples principle to measure response current, do not have direct electrical communication, help the substation safety reliability service with tested current return.
Description of drawings
Fig. 1 is the utility model structure drawing of device.
Fig. 2 is the utility model signal condition module circuit diagram.
Fig. 3 be the utility model in the capacitance type potential transformer loop practical measuring examples.
Embodiment
In Fig. 1, transformer station invades the ripple monitoring device and comprises Luo-coil measurement module, signal condition module, analog-to-digital conversion module, data processing module, clock control module, data-carrier store and transmission chip interface.Wherein the Luo-coil measurement module comprises Luo-coil and integrator, and Luo-coil can change the little electric current of coupling according to the electric current of measured branch road, just can realize big electric current is become little current signal through the integration of integrator; It is the Luo-coil measurement module to be measured electric current become voltage signal that the signal condition module mainly acts on, and is converted into the unipolar signal that analog to digital converter can identification by bipolar signal; Analog to digital converter is the core component of measurement mechanism, realizes that signal becomes digital quantity by analog quantity; Data processing module is a programmable module, realizes the control addressing, trigger pip setting and data integration function; Data-carrier store is mainly stored two parts data, and a part is circulating sampling data during triggerless under the storage monitoring branch road normal condition, and another part is to be stored in to invade ripple and act on monitoring branch road FPGA and trigger the after-current data; The frequency of operation of clock control module control analog to digital converter, sampling rate is 10MHz in invading the ripple current monitoring; The transmission chip interface is realized data transmission, can select relevant chip according to means of communication.
In Fig. 2, at the TVS pipe in parallel of input port in the same way, play the voltage clamp effect, absorb surge power, the voltage clamp that makes the two poles of the earth is in predetermined value, and effectively holding circuit is avoided the destruction of surge pulse.R1=R2=500 ohm in the circuit, R3=R4=2000 ohm, C1=C2=104 pico farad, C3=C4=20 pico farad, the power supply of amplifier is the 5V power supply, capacitor C 1 and C2 are in parallel with power supply, and R1 is connected with the amplifier reverse input end, and R2 is connected with input end in the same way, feedback network is resistance R 3 and the R4 with frequency-independent, in the output terminal of the amplifier resistance of connecting respectively is 50 ohm resistance, and the output terminal of amplifier connects the input end of next stage circuit, at two output terminals electric capacity of 20 pico farads in parallel respectively.Amplifier and capacitance resistance constitute difference channel jointly, and single-ended signal is become differential signal, have significantly improved signal to noise ratio (S/N ratio), suppress common mode interference.
In Fig. 3, be the intrusion ripple current monitoring waveform in 110kV substation bus bar capacitance type potential transformer loop.The residual voltage of 110kV bus capacitor formula voltage transformer circuit is 254kV, has loop parameter can determine that the loop maximum current is 5kA, and the number of turn of Luo-coil is 1000 circles, and range is 5kA, and sample frequency is made as 10MHz.The ripple electric current is invaded in the appearance of capacitance type potential transformer loop when a certain moment of substation operation, and FPGA triggers, and notes and triggers back 3000 sampled datas constantly, and finish and trigger the integration of preceding 1000 data.Waveform among the figure is recorded in electric current situation of change in 400 microseconds for invading the ripple current monitoring device.
Claims (3)
1. a transformer station invades the ripple current sampling device, it is characterized in that: comprise Luo-coil measurement module, signal condition module, analog-to-digital conversion module, clock control module, data processing module, data-carrier store, power-supply system.
2. invade the ripple current sampling device according to the described a kind of transformer station of claim 1, it is characterized in that: the Luo-coil measurement module comprises Luo-coil and integrator, Luo-coil can change the little electric current of coupling according to the electric current of measured branch road, just can realize big electric current is become little current signal through the integration of integrator; The signal condition module is made of TVS pipe, diode, amplifier chip LM353, and main effect is that Luo-coil measurement module measurement electric current is become voltage signal, and is converted into the unipolar signal that analog to digital converter can identification by bipolar signal; Analog to digital converter is the core component of measurement mechanism, and AD9238 constitutes by chip, realizes that signal becomes digital quantity by analog quantity; Data processing module is a programmable module, and EP1C144C8 constitutes by chip, realizes the control addressing, trigger pip setting and data integration function; Data-carrier store is made of IS61LV1024, mainly stores two parts data, and a part is circulating sampling data during triggerless under the storage monitoring branch road normal condition, and another part is to be stored in to invade ripple and act on monitoring branch road FPGA and trigger the after-current data; Clock control module adopts the active crystal oscillator of 10MHz, the frequency of operation of control analog to digital converter, and sampling rate is 10MHz in invading the ripple current monitoring; The transmission chip interface is realized data transmission, can select relevant chip according to means of communication.
3. a kind of transformer station according to claim 1 invades the ripple current sampling device, it is characterized in that: signal conditioning circuit adopts differential configuration, at the TVS pipe in parallel of input port in the same way, the power supply of amplifier is the 5V power supply, electric capacity is that the electric capacity of 104 pico farads is in parallel with the power supply of positive and negative 5V respectively, 500 ohm resistance is connected with reverse input end in the same way with the LM353 amplifier respectively, feedback network is the resistance with frequency-independent, resistance is 2000 ohm, in amplifier is 50 ohm resistance with the inverse output terminal resistance of connecting respectively in the same way, the output terminal of amplifier connects the input end of next stage circuit, at the electric capacity of two output terminals difference 20 pico farads in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120003168 CN201974466U (en) | 2011-01-05 | 2011-01-05 | Sampling device for intruding wave current in substation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120003168 CN201974466U (en) | 2011-01-05 | 2011-01-05 | Sampling device for intruding wave current in substation |
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| CN201974466U true CN201974466U (en) | 2011-09-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818927A (en) * | 2012-06-29 | 2012-12-12 | 西安交通大学 | Measuring device and measuring method of reverse small current in direct current distribution system |
| CN102879708A (en) * | 2012-09-21 | 2013-01-16 | 西安供电局 | Quick polarity testing method of 110kV gas insulated switchgear (GIS) of transformer substation |
| CN104502740A (en) * | 2014-11-21 | 2015-04-08 | 中国南方电网有限责任公司电网技术研究中心 | DC power transmission system converter station thunder intrusion wave sampling device and sampling method |
-
2011
- 2011-01-05 CN CN 201120003168 patent/CN201974466U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818927A (en) * | 2012-06-29 | 2012-12-12 | 西安交通大学 | Measuring device and measuring method of reverse small current in direct current distribution system |
| CN102818927B (en) * | 2012-06-29 | 2014-09-03 | 西安交通大学 | Measuring device and measuring method of reverse small current in direct current distribution system |
| CN102879708A (en) * | 2012-09-21 | 2013-01-16 | 西安供电局 | Quick polarity testing method of 110kV gas insulated switchgear (GIS) of transformer substation |
| CN102879708B (en) * | 2012-09-21 | 2015-06-24 | 西安供电局 | Quick polarity testing method of 110kV gas insulated switchgear (GIS) of transformer substation |
| CN104502740A (en) * | 2014-11-21 | 2015-04-08 | 中国南方电网有限责任公司电网技术研究中心 | DC power transmission system converter station thunder intrusion wave sampling device and sampling method |
| CN104502740B (en) * | 2014-11-21 | 2016-04-13 | 中国南方电网有限责任公司电网技术研究中心 | A kind of DC transmission system current conversion station Lightning Incoming Wave sampling apparatus and the method for sampling |
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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: TAIYUAN POWER SUPPLY COMPANY, SHANXI ELECTRIC POWE Effective date: 20121212 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: TAIYUAN POWER SUPPLY COMPANY, SHANXI ELECTRIC POWER COMPANY Effective date: 20121212 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 030012 TAIYUAN, SHAANXI PROVINCE TO: 100031 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121212 Address after: 100031 West Chang'an Avenue, Beijing, No. 86 Patentee after: State Grid Corporation of China Patentee after: Taiyuan Power Supply Company of Shanxi Electric Power Company Address before: 030012 Shanxi Province, Taiyuan city Yingze District State Road No. 89 Patentee before: Taiyuan Power Supply Company of Shanxi Electric Power Company |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |