CN2711741Y - Voltage measurer for high voltage network of electric power locomotive - Google Patents
Voltage measurer for high voltage network of electric power locomotive Download PDFInfo
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- CN2711741Y CN2711741Y CN 200420077858 CN200420077858U CN2711741Y CN 2711741 Y CN2711741 Y CN 2711741Y CN 200420077858 CN200420077858 CN 200420077858 CN 200420077858 U CN200420077858 U CN 200420077858U CN 2711741 Y CN2711741 Y CN 2711741Y
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- isolation
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Abstract
The utility model discloses a voltage measurer for high voltage network of electric power locomotive which belongs to the electric power locomotive technical field and comprises a resistance type partial pressure voltage sensor used to take up the voltage signal from the electric network. An A/D converter is used to convert the voltage signal into the digital signal. A digital signal processor is used to process the digit signal to obtain the voltage amplitude value of the electric network. The ascending isolation optical fiber is used to transmit the digital signal such as the voltage amplitude value of the electric network, the frequency and the phase angle to the secondary side instrument apparatus. The descending isolation optical fiber is used to transmit the digital signal and the control signal to the digital signal processor from the secondary side instrument apparatus. The isolation power is used to provide the power for the A/D converter, the digital signal processor and the ascending isolation optical fiber. The voltage measurer suggested by the utility model is provided with small volume and light weight. Because the primary side instrument apparatus and the secondary side instrument apparatus adopt the optical fiber to carry out the highly dependable isolation, the voltage measurer for high voltage network of electric power locomotive improves the safety of the driver and the passengers of the electric power locomotive and the equipment.
Description
Technical field
The utility model relates to a kind of electric locomotive high-voltage fence net voltage check device that is exclusively used in, and belongs to the electric locomotive technical field.
Technical background
The current power locomotive mainly adopts oil immersed type electromagnetism voltage transformer (VT) to the measurement of high-voltage fence net voltage.The oil immersed type voltage transformer (VT) mainly is made up of iron core, winding, fuel tank, outgoing line device and transformer oil.The shortcoming of existing structure is: the induction structure of iron core can produce ferroresonance, simultaneously owing to iron core magnetization characteristic, magnetic saturation characteristic cause the response speed of information transmission slow, the frequency of measured signal, voltage, electric current variation narrow range and phase angle measurement precision are not high, have non-linear and output characteristic saturation distortion, be difficult to adapt to along with technical development is pressed the higher demand that proposes of measuring to net.And oil immersed type voltage transformer (VT) weight, volume are excessive, because of with the insulation of insulating oil intensive body and cooling from but one-piece construction is complicated, must the periodic replacement insulating oil, happen occasionally at use mutual inductor insulating oil leakage.Above-mentioned situation has improved mutual inductor failure rate and maintenance cost in use.
Someone attempts using the perfusion dry type mutual inductor overcoming the shortcoming of the mutual device of oil immersed type electromagnetism voltage, but exists weight, volume big equally, phenomenon in use occurs bursting.
When a winding discharge of electromagnetic transformer or puncture, there is high voltage to enter the danger that secondary side jeopardizes personnel and instrument.The Secondary Winding open circuit is the precarious position that electromagnetic transformer must definitely be avoided.
Summary of the invention
The purpose of this utility model is to propose a kind of electric locomotive high-voltage fence net voltage check device that is exclusively used in, and changes the structure of existing electric locomotive high-voltage fence net voltage check device, to improve the security of operating personnel and checkout equipment.
The electric locomotive high-voltage fence net voltage measuring apparatus that the utility model proposes comprises:
(1) be used for being made up of high-voltage arm resistance R 1, low-voltage arm resistance R2 and discharge tube or stabilivolt S from the resistance-type branch pressure voltage sensor of electrical network taking-up voltage signal, discharge tube or stabilivolt S are in parallel with low-voltage arm resistance R2;
(2) be used for above-mentioned voltage signal is converted to the A/D converter of digital signal;
(3) be used for above-mentioned A/D converter digital signal is handled, with the digital signal processor at the voltage magnitude, frequency and the phasing degree that obtain electrical network;
(4) be used for voltage magnitude, frequency and the phasing degree digital data transmission of above-mentioned electrical network up isolation optical fiber to the secondary instrument device;
(5) be used for the descending isolation optical fiber of secondary instrument device to digital signal processor transmission of digital signals and control signal;
(6) insulating power supply that is used to above-mentioned A/D converter, digital signal processor and up isolation optical fiber to power.
The electric locomotive high-voltage fence net voltage measuring apparatus that the utility model proposes has little, the lightweight advantage of volume, its volume only for the tradition be used for electrical network net voltage detecting electromagnetic transformer about 1/8.Measure bandwidth, do not have the magnetic saturation problem, no ferroresonance phenomenon.And avoided the discharge of winding of traditional electromagnetic transformer or punctured the danger that high voltage enters secondary side, secondary side output does not exist traditional electromagnetic transformer Secondary Winding to forbid the requirement of opening a way.This electrical network net voltage check device has improved the safety of electric locomotive driver and conductor and equipment because primary side and secondary instrument device adopt optical fiber to carry out highly reliable isolation.
Description of drawings
The circuit diagram of the electric locomotive high-voltage fence net voltage measuring apparatus that Fig. 1 designs for the utility model.
Among Fig. 1, the 1st, voltage sensor, the 2nd, A/D converter, the 3rd, digital signal processor, 4 and 6 is respectively that optical fiber, the 7th, insulating power supply are isolated in uplink and downlink.
Embodiment
The electric locomotive high-voltage fence net voltage measuring apparatus that the utility model proposes, its circuit diagram as shown in Figure 1, be used for taking out the resistance-type branch pressure voltage sensor 1 of voltage signal from electrical network, be made up of high-voltage arm resistance R 1, low-voltage arm resistance R2 and discharge tube or stabilivolt S, discharge tube or stabilivolt S are in parallel with low-voltage arm resistance R2; Be used for voltage signal is converted to the A/D converter 2 of digital signal; Be used for digital signal is handled, with the digital signal processor 3 at the voltage magnitude, frequency and the phasing degree that obtain electrical network; Be used for voltage magnitude, frequency and the phasing degree digital data transmission of electrical network up isolation optical fiber 4 to the secondary instrument device; Be used for the descending isolation optical fiber 6 of secondary instrument device to digital signal processor transmission of data signals and control signal; Be used to the insulating power supply 7 of above-mentioned A/D converter, digital signal processor and the power supply of up isolation optical fiber.
Above-mentioned voltage measuring apparatus principle of work be:
As shown in Figure 1, the electrical network measuring voltage is by the input of A end, and high-voltage arm resistance R 1 and low-voltage arm resistance R2 form resistance-type branch pressure voltage sensor 1, and voltage signal takes out in low-pressure side.For preventing that overvoltage from appearring in low-pressure section, with protection secondary side measurement mechanism, must on low resistance, install a discharge tube or stabilivolt S additional, its sparking voltage is slightly less than just or equals the maximum voltage that low-pressure side allows.Voltage signal is finished the data acquisition of mains voltage signal through A-D converter 2 conversion, data are continued measured voltage magnitude by up isolation optical fiber 4 by digital signal processor 3 backs, frequency, digital signals such as phase angle through up isolation Optical Fiber Transmission to secondary instrument device 5, descending isolation optical fiber 6 is used to transmit data-signal and the control signal that the secondary instrument device sends to digital signal processor, A/D converter in this measurement mechanism, the power supply of digital signal processor and up isolation optical fiber is provided by insulating power supply 7, the scope that voltage is provided is at 3～110V, and isolated from power voltage is higher than 30KV.
Wherein secondary instrument device 5 can be: net is pressed indicator gauge, watt-hour meter and power factor compensation control system (PFC), relay protection system or other any equipment.
In the instantiation of the present utility model, the model of voltage sensor 1 can be JDCG-W25, and the model of A/D converter 2 can be BTAD-05, and the model of digital signal processor 3 can be PIC18F248, and the model of insulating power supply 7 can be BTP110/15-A.
Claims (1)
1, a kind of electric locomotive high-voltage fence net voltage measuring apparatus is characterized in that this measurement mechanism comprises:
(1) be used for being made up of high-voltage arm resistance R 1, low-voltage arm resistance R2 and discharge tube or stabilivolt S from the resistance-type branch pressure voltage sensor of electrical network taking-up voltage signal, discharge tube or stabilivolt S are in parallel with low-voltage arm resistance R2;
(2) be used for above-mentioned voltage signal is converted to the A/D converter of digital signal;
(3) be used for above-mentioned A/D converter digital signal is handled, with the digital signal processor at the voltage magnitude, frequency and the phasing degree that obtain electrical network;
(4) be used for voltage magnitude, frequency and the phasing degree digital data transmission of above-mentioned electrical network up isolation optical fiber to the secondary instrument device;
(5) be used for the descending isolation optical fiber of secondary instrument device to digital signal processor transmission of data signals and control signal;
(6) insulating power supply that is used to above-mentioned A/D converter, digital signal processor and up isolation optical fiber to power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420077858 CN2711741Y (en) | 2004-07-16 | 2004-07-16 | Voltage measurer for high voltage network of electric power locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420077858 CN2711741Y (en) | 2004-07-16 | 2004-07-16 | Voltage measurer for high voltage network of electric power locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2711741Y true CN2711741Y (en) | 2005-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420077858 Expired - Fee Related CN2711741Y (en) | 2004-07-16 | 2004-07-16 | Voltage measurer for high voltage network of electric power locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2711741Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680758A (en) * | 2012-05-14 | 2012-09-19 | 华中科技大学 | Digitalized optical fiber voltage transformer |
| CN110470876A (en) * | 2019-09-19 | 2019-11-19 | 散裂中子源科学中心 | A kind of the high_voltage isolation detection circuit and detection method of neutral earthing high-pressure system |
-
2004
- 2004-07-16 CN CN 200420077858 patent/CN2711741Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680758A (en) * | 2012-05-14 | 2012-09-19 | 华中科技大学 | Digitalized optical fiber voltage transformer |
| CN110470876A (en) * | 2019-09-19 | 2019-11-19 | 散裂中子源科学中心 | A kind of the high_voltage isolation detection circuit and detection method of neutral earthing high-pressure system |
| CN110470876B (en) * | 2019-09-19 | 2021-12-24 | 散裂中子源科学中心 | High-voltage isolation detection circuit and detection method of midpoint grounding high-voltage system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |