CN102680758A - Digitalized optical fiber voltage transformer - Google Patents
Digitalized optical fiber voltage transformer Download PDFInfo
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- CN102680758A CN102680758A CN2012101485176A CN201210148517A CN102680758A CN 102680758 A CN102680758 A CN 102680758A CN 2012101485176 A CN2012101485176 A CN 2012101485176A CN 201210148517 A CN201210148517 A CN 201210148517A CN 102680758 A CN102680758 A CN 102680758A
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 11
- 230000003137 locomotive Effects 0.000 abstract description 10
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000003287 optical Effects 0.000 abstract 2
- 238000005259 measurement Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The invention discloses a digitalized optical fiber voltage transformer which comprises a voltage sensor positioned at the top of a vehicle, an A/D (Analog/Digital) converter, a control processing unit, a power supply module and a signal receiving unit positioned in the vehicle, wherein the control processing unit is connected with the signal receiving unit through a communication optical fiber; the voltage sensor is used for acquiring a signal from a power grid, is a voltage division type voltage sensor and is formed by connecting high-voltage impedance with low-voltage impedance in series; the A/D converter is connected with the low-voltage resistance in parallel; the input end of a power supply is connected with the low-voltage resistance in parallel; and the signal receiving unit receives an optical signal transmitted by the communication optical fiber and converts the optical signal into a voltage signal. According to the digitalized optical fiber voltage transformer disclosed by the invention, due to the adoption of the voltage division type voltage sensor, no external power supply and battery are needed; the output end of the digitalized optical fiber voltage transformer is in communicated connection with a vehicle-mounted device through an optical fiber, strong anti-jamming capability is obtained and complete electrical isolation can be realized. The digitalized optical fiber voltage transformer can replace an original traditional transformer for a locomotive and is especially suitable for electric locomotives (including urban rail locomotives).
Description
Technical field
The present invention relates to electric locomotive line voltage measuring technique, be specifically related to a kind of digital optical fiber voltage transformer (VT), it is particularly suitable for electric locomotive (comprising the city rail locomotive) and uses.
Technical background
The current power locomotive mainly is to use traditional electromagnetic potential transformer to the measurement of line voltage.Receive the restriction of sensor mechanism, traditional voltage mutual inductor dynamic range is little, frequency band is narrower, have ferroresonance be prone to take place and cause superpotential and output can not short circuit etc. shortcoming.Traditional on the other hand electromagnetic potential transformer output terminal directly links to each other with car-mounted device, and when a winding discharge of mutual inductor or insulation breakdown, high voltage possibly get into the safety that secondary side jeopardizes personnel and instrumentation.Tradition mutual inductor secondary output power is bigger, and there is heating inside, and failure rate is higher.China Express Railway (comprising urban track traffic) development is swift and violent, and the electric locomotive power supply grid has dynamic range big (17-31kV), bandwidth, and characteristics such as changes in environmental conditions is violent, these are had higher requirement to voltage transformer (VT).
Summary of the invention
The purpose of this invention is to provide a kind of digital optical fiber voltage transformer (VT), this mutual inductor antijamming capability is strong, and can guarantee safe isolation.
A kind of digital optical fiber voltage transformer (VT) provided by the invention; It is characterized in that; It comprises voltage sensor, A/D converter, controlled processing unit and the power module that is positioned at roof; And the signal receiving unit that is positioned at car, controlled processing unit is connected with signal receiving unit through communication optical fiber;
Voltage sensor is used for taking out signal from electrical network, and it is a divided voltage sensor, is in series by high pressure impedance and low pressure impedance; A/D converter is parallelly connected with the low pressure impedance, converts the aanalogvoltage in the low pressure impedance to digital signal; One end of controlled processing unit links to each other with A/D converter, and the other end links to each other with signal receiving unit through communication optical fiber; Controlled processing unit is used for A/D converter is controlled, and will export digital signal and convert light signal to, and offers signal receiving unit through optical fiber; Power module is A/D converter and controlled processing unit power supply, and the input end of this power supply is parallelly connected with the low pressure impedance; Signal receiving unit is accepted the light signal that communication optical fiber is sent to and is converted into electric signal.
Sensor used in the present invention and related device, little power consumption and miniaturization are not generated heat basically.The output of this measurement mutual inductor and car-mounted device are only got in touch through optical fiber, but the signal teletransmission, and antijamming capability is strong, and the reliable safety that guarantees is isolated.The sensor bandwidth that is adopted, dynamic range is big.The needed working power of high-tension circuit is directly obtained from electrical network through voltage divider, need not to connect in addition power supply or battery.
The digitizing of the present invention's ability adaline truck system, intellectuality and networked demand, its dynamic range is big, bandwidth; The circuits needed working power of mutual inductor own is directly obtained from electrical network through voltage divider.Measurement mechanism and car-mounted device are only got in touch through optical fiber, guarantee the safety isolation fully.The output signal of digital optical fiber voltage transformer (VT) can directly be used for protection, control and electronic type metering outfit, does not have EMR electromagnetic resonance, no-output can not short circuit etc. shortcoming.This mutual inductor insulation system is simple, need not insulating oil, need not iron core, is convenient to transportation and installation and without explosion danger.Compare with the obvious advantage with traditional mutual inductor.Especially adopt optical fiber to transmit signal, guaranteed car-mounted device and staff's safety.
Description of drawings
The structural representation of a kind of digital optical fiber voltage transformer (VT) that Fig. 1 designs for the present invention, among Fig. 1, the 1st, voltage sensor, the 2nd, A/D converter, the 3rd, controlled processing unit, the 4th, power module, the 5th, communication optical fiber, the 6th, signal receiving unit.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1; Digital optical fiber voltage transformer (VT) provided by the invention comprises voltage sensor 1, A/D converter 2, controlled processing unit 3 and the power module 4 that is positioned at roof; And the signal receiving unit 6 that is positioned at car, controlled processing unit 3 is connected with signal receiving unit 6 through communication optical fiber 5.
Signal receiving unit 6 can be provided with separately, also can place among measurement, control and the protective device in the car.
Voltage sensor 1 is used for taking out signal from electrical network, and it is a divided voltage sensor, is in series by high pressure impedance Z 1 and low pressure impedance Z 2; A/D converter 2 is parallelly connected with low pressure impedance Z 2, converts the aanalogvoltage on the low pressure impedance Z 2 to digital signal;
One end of controlled processing unit 3 links to each other with A/D converter 2, and the other end links to each other with signal receiving unit 6 through optical fiber 5.Controlled processing unit 3 is used for A/D converter is controlled, and will export digital signal and convert light signal to, and offers signal receiving unit 6 through optical fiber; Power module 4 is A/D converter 2 and controlled processing unit 3 power supplies, and the input end of this power supply is parallelly connected with low pressure impedance Z 2; Signal receiving unit 6 is accepted light signal that optical fiber 5 is sent to and is converted into voltage signal and gets into the digital electricity meter in the car-mounted device; Provide device such as multi-path digital or simulating signal metering, control and the protection in buying car in installments to use simultaneously, be used for measuring, control and protection.
The voltage divider of sensor 1 can be a resistance divider in the above-mentioned Fiber-Optic Voltage, also can be condenser divider, can also be the resistance-capacitance type voltage divider.
To offer the electric signal of car-mounted device can be digital signal to signal receiving unit 6 in the above-mentioned Fiber-Optic Voltage, also can be analog voltage signal.
Electric locomotive power supply grid high voltage is greater than 17kV, generally in the 17-31kV scope.Voltage on this Fiber-Optic Voltage mesolow impedance Z 2 is lower than 10V, thousand times of the about 3-5 of the two voltage phase difference.
Representative instance is following:
When electrical network high voltage U=25kV; Voltage on the low pressure impedance Z 2 is 5V, and this voltage is the input voltage of A/D converter 2, and the corresponding digital signal of A/D converter 2 outputs is given controlled processing unit 3; Controlled processing unit 3 passes through control and treatment; Output serial digital light signal, this light signal are coupled into communication optical fiber 5 and transmit, and signal receiving unit 6 is accepted the light signal that optical fiber 5 is sent to and be converted into required electric signal to buy car in installments and carry device and use.Power supply 4 energy that Z2 obtains from voltage sensor 11 provides the direct voltage source that is output as 5V through through behind the rectifying and voltage-stabilizing, supplies A/D converter 2 and controlled processing unit 3 to use.
The present invention is fully according to national standard and railway standard design, and the signal that offers car-mounted device can reflect accurately that the situation of power supply network high tension voltage changes; It is simple and reliable to insulate, and maintenance period is long, can improve the reliability of power supply greatly, can be widely used in the electric locomotive of various models.
The present invention not only is confined to above-mentioned embodiment; Persons skilled in the art are according to content disclosed by the invention; Can adopt other multiple embodiment embodiment of the present invention, therefore, every employing project organization of the present invention and thinking; Do some simple designs that change or change, all fall into the scope of the present invention's protection.
Claims (4)
1. digital optical fiber voltage transformer (VT); It is characterized in that; It comprises voltage sensor, A/D converter, controlled processing unit and the power module that is positioned at roof, and the signal receiving unit that is positioned at car, and controlled processing unit is connected with signal receiving unit through communication optical fiber;
Voltage sensor is used for taking out signal from electrical network, and it is a divided voltage sensor, is in series by high pressure impedance and low pressure impedance; A/D converter is parallelly connected with the low pressure impedance, converts the aanalogvoltage in the low pressure impedance to digital signal; One end of controlled processing unit links to each other with A/D converter, and the other end links to each other with signal receiving unit through communication optical fiber; Controlled processing unit is used for A/D converter is controlled, and will export digital signal and convert light signal to, and offers signal receiving unit through optical fiber; Power module is A/D converter and controlled processing unit power supply, and the input end of this power supply is parallelly connected with the low pressure impedance; Signal receiving unit is accepted the light signal that communication optical fiber is sent to and is converted into voltage signal.
2. digital optical fiber voltage transformer (VT) according to claim 1 is characterized in that, said divided voltage sensor is resistance divider, condenser divider or resistance-capacitance type voltage divider.
3. digital optical fiber voltage transformer (VT) according to claim 1 and 2 is characterized in that, signal receiving unit is provided with or places car-mounted device separately.
4. digital optical fiber voltage transformer (VT) according to claim 1 and 2 is characterized in that, the electric signal of said signal receiving unit output is digital signal or analog voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101485176A CN102680758A (en) | 2012-05-14 | 2012-05-14 | Digitalized optical fiber voltage transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101485176A CN102680758A (en) | 2012-05-14 | 2012-05-14 | Digitalized optical fiber voltage transformer |
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| CN102680758A true CN102680758A (en) | 2012-09-19 |
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| CN2012101485176A Pending CN102680758A (en) | 2012-05-14 | 2012-05-14 | Digitalized optical fiber voltage transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217564A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Voltage sensor and implementing method thereof based on alloy resistor |
| CN103245813A (en) * | 2013-03-28 | 2013-08-14 | 国家电网公司 | Comprehensive sensing and measuring device based on alloy resistance and implementation method thereof |
| CN103698596A (en) * | 2014-01-10 | 2014-04-02 | 三峡大学 | Device and method for measuring high voltage of electric power system |
| CN104890680A (en) * | 2015-06-17 | 2015-09-09 | 株洲中车轨道交通装备有限公司 | Grid switching method of control system for inner-city rapid rail vehicles and control system |
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| CN2711741Y (en) * | 2004-07-16 | 2005-07-20 | 马兴凯 | Voltage measurer for high voltage network of electric power locomotive |
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| CN101285853A (en) * | 2008-02-15 | 2008-10-15 | 徐伟专 | Wide band high voltage intelligent electric resistance partial pressure type voltage sensor |
| CN201332015Y (en) * | 2008-12-30 | 2009-10-21 | 张航生 | Electron type current transformer |
| US20100007358A1 (en) * | 2008-07-11 | 2010-01-14 | Liaisons Electroniques-Mecaniques Lem Sa | Sensor for high voltage environment |
| CN101995502A (en) * | 2010-12-01 | 2011-03-30 | 上海市电力公司超高压输变电公司 | Current-voltage integrated digital mutual inductor |
| CN102163495A (en) * | 2011-01-26 | 2011-08-24 | 吕强 | Voltage transformer |
| CN202649276U (en) * | 2012-05-14 | 2013-01-02 | 华中科技大学 | Digitalized fiber voltage transformer |
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2012
- 2012-05-14 CN CN2012101485176A patent/CN102680758A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2711741Y (en) * | 2004-07-16 | 2005-07-20 | 马兴凯 | Voltage measurer for high voltage network of electric power locomotive |
| CN201060251Y (en) * | 2007-06-06 | 2008-05-14 | 株洲市科达电机技术有限公司 | Digital type high-pressure signal monitoring apparatus for electric power locomotive engine |
| CN101285853A (en) * | 2008-02-15 | 2008-10-15 | 徐伟专 | Wide band high voltage intelligent electric resistance partial pressure type voltage sensor |
| US20100007358A1 (en) * | 2008-07-11 | 2010-01-14 | Liaisons Electroniques-Mecaniques Lem Sa | Sensor for high voltage environment |
| CN201332015Y (en) * | 2008-12-30 | 2009-10-21 | 张航生 | Electron type current transformer |
| CN101995502A (en) * | 2010-12-01 | 2011-03-30 | 上海市电力公司超高压输变电公司 | Current-voltage integrated digital mutual inductor |
| CN102163495A (en) * | 2011-01-26 | 2011-08-24 | 吕强 | Voltage transformer |
| CN202649276U (en) * | 2012-05-14 | 2013-01-02 | 华中科技大学 | Digitalized fiber voltage transformer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217564A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Voltage sensor and implementing method thereof based on alloy resistor |
| CN103245813A (en) * | 2013-03-28 | 2013-08-14 | 国家电网公司 | Comprehensive sensing and measuring device based on alloy resistance and implementation method thereof |
| CN103245813B (en) * | 2013-03-28 | 2016-04-20 | 国家电网公司 | A kind of comprehensive sensing measuring apparatus based on resistance alloys and its implementation |
| CN103217564B (en) * | 2013-03-28 | 2016-08-31 | 国家电网公司 | A kind of voltage sensor based on resistance alloys and its implementation |
| CN103698596A (en) * | 2014-01-10 | 2014-04-02 | 三峡大学 | Device and method for measuring high voltage of electric power system |
| CN103698596B (en) * | 2014-01-10 | 2016-11-16 | 三峡大学 | A kind of power system high voltage meter and method |
| CN104890680A (en) * | 2015-06-17 | 2015-09-09 | 株洲中车轨道交通装备有限公司 | Grid switching method of control system for inner-city rapid rail vehicles and control system |
| CN104890680B (en) * | 2015-06-17 | 2017-06-06 | 株洲中车轨道交通装备有限公司 | A kind of fast rail vehicle control system net changing method of administrative region of a city and control system |
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Application publication date: 20120919 |