CN202649276U - Digitalized fiber voltage transformer - Google Patents
Digitalized fiber voltage transformer Download PDFInfo
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- CN202649276U CN202649276U CN 201220214404 CN201220214404U CN202649276U CN 202649276 U CN202649276 U CN 202649276U CN 201220214404 CN201220214404 CN 201220214404 CN 201220214404 U CN201220214404 U CN 201220214404U CN 202649276 U CN202649276 U CN 202649276U
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Abstract
The utility model discloses a digitalized fiber voltage transformer comprising a voltage sensor arranged on a vehicle top , an A/D converter, a control processing unit, a power source module, and a signal receiving unit arranged in the vehicle, and the control processing unit is connected with the signal receiving unit through a communication fiber; the voltage sensor is used for obtaining signals from power grid, and is a partial pressure type voltage sensor, and the voltage sensor comprises a high pressure impedance and a low pressure impedance in series connection; the A/D converter is in parallel connection with the low pressure impedance, and an input terminal of the power source is in parallel connection with the low pressure impedance; and the signal receiving unit receives optical signals sent by the communication fiber and converts the optical signals into voltage signals. The partial pressure sensor is employed, no externally connected power source and cells are needed, signals are outputted through the optical fiber to carry out communicating connection with vehicle-mounted devices, anti-interference capability is strong, and completely electrical isolation is realized. The digitalized fiber voltage transformer can replace originally conventional locomotive-used mutual inductor. The digitalized fiber voltage transformer is especially suitable for electric locomotive (including city track locomotive) to use.
Description
Technical field
The utility model relates to electric locomotive line voltage measuring technique, is specifically related to a kind of digital optical fiber voltage transformer (VT), and 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.Be subjected to the restriction of sensor mechanism, traditional voltage transformer (VT) dynamic range is little, frequency band is narrower, have easy generation ferroresonance and cause superpotential and output can not short circuit etc. shortcoming.Traditional electromagnetic potential transformer output terminal directly links to each other with car-mounted device on the other hand, and when a winding discharge of mutual inductor or insulation breakdown, high voltage may enter the safety that secondary side jeopardizes personnel and instrumentation.Tradition mutual inductor secondary output power is larger, 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 large (17-31kV), bandwidth, and the characteristics such as changes in environmental conditions is violent, these are had higher requirement to voltage transformer (VT).
The utility model content
The purpose of this utility model provides a kind of digital optical fiber voltage transformer (VT), and this mutual inductor antijamming capability is strong, and can guarantee safe isolation.
A kind of digital optical fiber voltage transformer (VT) that the utility model provides, 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 by communication optical fiber;
Voltage sensor is used for taking out signal from electrical network, and it is divided voltage sensor, is in series by high pressure impedance and low pressure impedance; A/D converter is in parallel 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 by communication optical fiber; Controlled processing unit is used for A/D converter is controlled, and converts output digit signals to light signal, and offers signal receiving unit by optical fiber; Power module is A/D converter and controlled processing unit power supply, and the input end of this power supply is in parallel 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.
The employed sensor of the utility model and related device, little power consumption and miniaturization are not generated heat substantially.The output of this measurement mutual inductor and car-mounted device only contact by optical fiber, but the signal teletransmission, and antijamming capability is strong, and Reliable guarantee is isolated safely.The sensor bandwidth that adopts, dynamic range is large.The needed working power of high-tension circuit is directly obtained from electrical network by voltage divider, need not to connect in addition power supply or battery.
The digitizing of the utility model energy adaline truck system, intellectuality and networked demand, its dynamic range is large, bandwidth; The needed working power of the circuit of mutual inductor own is directly obtained from electrical network by voltage divider.Measurement mechanism and car-mounted device only contact by optical fiber, guarantee the safety isolation fully.The output signal of digital optical fiber voltage transformer (VT) can be directly used in protection, control and electronic type metering outfit, does not have 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 the optical fiber transmission number of delivering letters, 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 utility model, 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 purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the digital optical fiber voltage transformer (VT) that the utility model provides 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 by communication optical fiber 5.
Voltage sensor 1 is used for taking out signal from electrical network, and it is divided voltage sensor, is in series by high pressure impedance Z 1 and low pressure impedance Z 2; A/D converter 2 is in parallel 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 by communication optical fiber 5.Controlled processing unit 3 is used for A/D converter is controlled, and converts output digit signals to light signal, and offers signal receiving unit 6 by 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 in parallel with low pressure impedance Z 2; Signal receiving unit 6 is accepted light signal that communication optical fiber 5 is sent to and is converted into voltage signal and enters digital electricity meter in the car-mounted device; provide simultaneously multi-path digital or simulating signal for devices such as the metering in the car, control and protections, be used for measuring, control and protection.
The voltage divider of sensor 1 can be 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 as follows:
When electrical network high voltage U=25kV, voltage on the low pressure impedance Z 2 is 5V, this voltage is the input voltage of A/D converter 2, the digital signal of A/D converter 2 output correspondences is to controlled processing unit 3, controlled processing unit 3 is processed by control, 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 communication optical fiber 5 is sent to and is converted into required electric signal for car-mounted device.Power module 4 energy that Z2 obtains from voltage sensor 1 provides the direct voltage source that is output as 5V, for A/D converter 2 and controlled processing unit 3 through by behind the rectifying and voltage-stabilizing.
The utility model 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 greatly improve power supply reliability, can be widely used in the electric locomotive of various models.
The utility model not only is confined to above-mentioned embodiment; persons skilled in the art are according to the disclosed content of the utility model; can adopt other multiple embodiment to implement the utility model; therefore; every employing project organization of the present utility model and thinking; do some simple designs that change or change, all fall into the scope of the utility model 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 by communication optical fiber;
Voltage sensor is used for taking out signal from electrical network, and it is divided voltage sensor, is in series by high pressure impedance and low pressure impedance; A/D converter is in parallel 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 by communication optical fiber; Controlled processing unit is used for A/D converter is controlled, and converts output digit signals to light signal, and offers signal receiving unit by optical fiber; Power module is A/D converter and controlled processing unit power supply, and the input end of this power supply is in parallel 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, described 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 arranges separately or place car-mounted device.
4. digital optical fiber voltage transformer (VT) according to claim 1 and 2 is characterized in that, the electric signal of described signal receiving unit output is digital signal or analog voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220214404 CN202649276U (en) | 2012-05-14 | 2012-05-14 | Digitalized fiber voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220214404 CN202649276U (en) | 2012-05-14 | 2012-05-14 | Digitalized fiber voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202649276U true CN202649276U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220214404 Expired - Fee Related CN202649276U (en) | 2012-05-14 | 2012-05-14 | Digitalized fiber voltage transformer |
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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 |
| CN105445521A (en) * | 2014-08-22 | 2016-03-30 | 南京南瑞继保电气有限公司 | Optical voltage transformer |
| CN106199118A (en) * | 2016-07-22 | 2016-12-07 | 浙江天际互感器有限公司 | The capacitance-voltage-distributing type zero sequential potential transformer of charged output |
-
2012
- 2012-05-14 CN CN 201220214404 patent/CN202649276U/en not_active Expired - Fee Related
Cited By (4)
| 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 |
| CN105445521A (en) * | 2014-08-22 | 2016-03-30 | 南京南瑞继保电气有限公司 | Optical voltage transformer |
| CN106199118A (en) * | 2016-07-22 | 2016-12-07 | 浙江天际互感器有限公司 | The capacitance-voltage-distributing type zero sequential potential transformer of charged output |
| CN106199118B (en) * | 2016-07-22 | 2022-10-11 | 浙江天际互感器有限公司 | Capacitor voltage-dividing type zero sequence voltage transformer with power output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140514 |