CN204439756U - The energy supply laser ageing life-span on-line monitoring system of active electronic transformer - Google Patents
The energy supply laser ageing life-span on-line monitoring system of active electronic transformer Download PDFInfo
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- CN204439756U CN204439756U CN201520102519.0U CN201520102519U CN204439756U CN 204439756 U CN204439756 U CN 204439756U CN 201520102519 U CN201520102519 U CN 201520102519U CN 204439756 U CN204439756 U CN 204439756U
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Abstract
The utility model relates to a kind of energy supply laser ageing life-span on-line monitoring system of active electronic transformer, comprises sensing module, single-chip microcomputer, computing machine, and sensing module measures merge cells voltage, current signal, sends to single-chip microcomputer; Single-chip microcomputer receiver voltage, current analog signal, and be converted into digital signal, send to computing machine by communication bus; Computing machine connects single-chip microcomputer and merge cells, receives the current signal data on merge cells supply voltage, current signal data and bus, provides related data for monitoring facilities carries out life-span monitoring.This system obtains the current value of the power supply of the merge cells at monitored energy supply laser instrument place by Real-time Collection, realize monitoring the direct-on-line in energy supply laser instrument normal aging life-span, fill up the blank in electronic current mutual inductor normal aging life-span on-line monitoring technique field, there is reliability high, and strong to ambient adaptability, be convenient to the advantage of transplanting.
Description
Technical field
The utility model belongs to intelligent grid equipment on-line status monitoring field, more specifically, relates to a kind of energy supply laser ageing life-span on-line monitoring system of active electronic transformer.
Background technology
Along with the development of digital transformer substation, electronic mutual inductor is applied more and more widely.According to the standard of International Electrotechnical Commission, electronic mutual inductor can be divided into active and passive type two kinds.Active refers to that sensing head part adopts traditional sensing principle, only utilize the electronic mutual inductor of Optical Fiber Transmission data, because optical fiber is merely able to transmission of digital signals, so corresponding electronic circuit certainly will will be designed to meet analog quantity and digital quantity to be carried out in high-pressure side conversion requirements to the output signal of sensing head, thus also just bring the energy supply problem of circuit, this be active electronic transformer research in difficult point and gordian technique.
For above-mentioned energy supply problem, most widely used in current active electronic transformer scheme is adopt the composite energy supply technology be made up of CT energy supply and laser instrument energy supply, as shown in Figure 1, active electronic transformer primarily of sensing element 1, getting can the composition such as element 2, high-pressure side circuit 4, energy supply circuit 5.Merge cells 12 is for receiving the signal of active electronic transformer, and row relax of going forward side by side, sends to follow-up measurement mechanism 10 and protective relaying device 11, and its inner energy supply laser instrument, as a part for mutual inductor energising power, can carry out energy supply to mutual inductor.Active electronic transformer has two energy supply sources: CT energy supply circuit 5 and photoelectric cell 6.When bus 3 electric current is larger, energy can be got from bus 3 by element 2 by getting, after energy supply circuit 5 rectification, filtering, voltage stabilizing etc. process, being supplied to the necessary power supply of high-pressure side circuit 4.When bus 3 electric current is less, adopts laser power supply mode, by optical fiber 7, luminous energy is sent on high-tension side photoelectric cell 6 by high power laser pipe 8, by photoelectric cell, luminous energy is converted to electric flux, then after DC-DC conversion, provide stable power supply to export.This method both can avoid the dead-time problem of CT energy supply, also can reduce the time of high power laser work, extended its life-span.
In the active electronic transformer application scheme that have employed laser power supply, due to the importance of energy supply, the reliable monitoring of energy supply laser status performance is just seemed very important, especially to the monitoring of energy supply laser life-span.And the monitoring to laser life-span, be divided into again the fault life-span to monitor and aging life-span monitoring.
At present, more to the research of energy supply laser failure life-span monitoring aspect, be mostly that the duty under laser instrument actual conditions and the duty under normal running conditions are compared, judge whether energy supply laser instrument breaks down with this.And it is less to the research of energy supply laser ageing life-span monitoring aspect, still lack strong to ambient adaptability, that reliability is high monitoring method, existing technical scheme can not directly be assessed the laser ageing life-span, and be indirect assessment at the most, life prediction, thus also can only take trouble hunting or prophylactic repair to the maintenance of energy supply laser instrument, this with realize compared with repair based on condition of component with life-span direct assessment technology, reliability is low, less economical.Therefore the maintenance of more reliable laser status is realized in the urgent need to a kind of technology can carrying out directly monitoring to the laser ageing life-span.
Summary of the invention
The utility model is combined the inner energy supply laser instrument of unit aging life-span in order to overcome prior art can not carry out online deficiency of directly monitoring, provide a kind of energy supply laser ageing life-span on-line monitoring system of active electronic transformer, this system can direct-on-line monitoring laser instrument the normal aging life-span, achieve the repair based on condition of component of laser instrument.
For solving the problem, the technical solution of the utility model is:
An energy supply laser ageing life-span on-line monitoring system for active electronic transformer, comprising: sensing unit, single-chip microcomputer, computing machine:
Sensing unit comprises voltage sensor, current sensor, and wherein, current sensor is installed on the point of incoming cables that direct supply is powered to merge cells, to gather merge cells supply current signal; Voltage sensor, is connected in parallel with merge cells, for gathering merge cells supply voltage signal;
The signaling interface of single-chip microcomputer is connected with current sensor and voltage sensor, for receiver voltage, current analog signal, and is converted into digital signal, sends to computing machine by communication bus.
Computing machine connects single-chip microcomputer and merge cells, receives the current signal data on merge cells supply voltage, current signal data and bus, provides related data for carrying out life-span monitoring.
Described computing machine is provided with conventional monitoring facilities, for carrying out threshold decision to current signal, automatic display life situation.
The utility model, by gathering merge cells supply current signal, is monitored the state of laser instrument.
The utility model has the advantage of:
The indirect inspection that the utility model system realizes energy supply laser works electric current by directly measuring merge cells power supply electric current, and then realize monitoring the direct-on-line in energy supply laser instrument normal aging life-span, fill up the blank of electronic current mutual inductor normal aging life-span direct-on-line monitoring, there is reliability high, ambient adaptability is strong, and is convenient to the advantage of transplanting.
Accompanying drawing explanation
Fig. 1 is active electronic transformer composite energy supply schematic diagram;
Fig. 2 is the energy supply laser ageing life monitoring system schematic diagram of active electronic transformer of the present utility model;
Fig. 3 is the relation of energy supply optical output power of laser and its drive current, and wherein, curve a is laser instrument P-I curve under normal circumstances, and curve b is the P-I curve in laser ageing situation;
Fig. 4 is energy supply laser drive power principle schematic;
In all of the figs, identical Reference numeral is used for representing identical element or structure, wherein:
1-sensing element, 2-gets energy element, 3-high voltage bus, 4-high-pressure side circuit; 5-energy supply circuit, 6-photoelectric cell, 7-optical fiber, 8-high power laser; 9-lower-voltage circuit, 10-measurement mechanism, 11-protective relaying device, 12-merge cells; 13-DC-DC power supply, 14-laser drive power (constant current source), 15-laser diode; 16-direct supply, 17-current sensor, 18-voltage sensor; 19-single-chip microcomputer, 20-communication bus, 21-computing machine.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, 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 explain the utility model, and be not used in restriction the utility model.In addition, if below in described each embodiment of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
As shown in Figure 2, a kind of energy supply laser instrument online life-span direct monitoring system for realizing active electronic transformer, this system comprises: direct supply 16 is powered for giving merge cells 12; Current sensor 17 is installed on the point of incoming cables that direct supply is powered to merge cells 12, to gather merge cells 12 supply current signal; Voltage sensor 18 and merge cells 12 are connected in parallel, for gathering merge cells 12 supply voltage signal; The signaling interface of single-chip microcomputer 19 is connected with current sensor and voltage sensor, for receiver voltage, current analog signal, and is converted into digital signal, sends to computing machine 21 by communication bus 20; Computing machine 21 connects single-chip microcomputer 19 and merge cells 12, receives the current signal data on merge cells supply voltage, current signal data and bus, provides related data for monitoring facilities carries out life-span monitoring.Energy supply laser instrument is as a part for merge cells 12, and its working power is provided by the direct supply 16 of merge cells 12.
The sensing unit of native system refers to voltage sensor 18, current sensor 17.They choose the requirement will considering range and precision two aspect.Therefore must first calculate in conjunction with the power of merge cells 12 and laser instrument, to select suitable range and precision, guarantee effectively to measure.Such as select 220V direct current supply in transformer station, then voltage measurement scope is chosen as 0 ~ 250V.According to the explanation in " State Grid Corporation of China's purchase of goods and materials standard ", when merge cells normally works, its power consumption should be not more than 30W, and the power of laser instrument is generally 10W, then set merge cells to remove other Partial Powers of laser instrument as 20W.Getting merge cells power is 20 ~ 30W (when getting 20W, laser instrument is closed, and when getting 30W, laser instrument opens work), and voltage 220V, calculating current measuring range is 91 ~ 136mA, and the current variation value that switched laser device causes is 45mA.
Because laser diode forward conduction voltage drop is very stable, therefore when the working current of energy supply laser instrument increases 25%, the electric power of laser instrument also can increase 25%.Suppose DC-DC power source 13 and laser drive power (constant current source) 14 working stability, its power conversion efficiency is constant, when then the electric power of laser instrument increases 25%, the power that merge cells power supply is supplied to laser circuit part also can increase 25%, owing to standing, interior 220V DC voltage is more stable, then corresponding merge cells power supply electric current can increase 25%, is 11.25mA.Therefore LV 25-P type voltage sensor can be selected, accuracy of measurement is 1.5%, CT 0.1-P type current sensor, and accuracy of measurement is 1%, can the electric current of Measurement accuracy 1.36mA.
Microprocessor is the control core of single-chip microcomputer 19, optional with there is standard communication interface and carrying the microprocessor of high-precision A/D module, the MSP430 series microprocessor of such as TI company, in order to ensure the precision of current measurement, can select the microprocessor of band 16 A/D converters.
Communication bus 20, for the data communication of the computing machine in single-chip microcomputer and Control Room, can select RS232 or RS485 etc. as required, and wherein RS485 communication distance can reach 1000 meters, and adopts differential transfer mode, has stronger antijamming capability.
The hardware platform that computing machine 21 provides conventional monitoring of software to run, runs on monitoring of software on computing machine for the treatment of the measurement data received, Labview can be used to develop.Monitoring facilities, by receiving the current signal of merge cells, is made threshold decision to it, is seen whether it exceedes the threshold value of setting, can know whether the aging life-span of laser instrument terminates.
Finally, in actual applications, galvanic current source 16 in transformer station is utilized to power to merge cells 12, supply current, voltage signal is gathered respectively with current sensor 17 and voltage sensor 18, be sent to single-chip microcomputer 19, carry out A/D conversion, then data communication bus 20 is sent to computing machine 21, carry out data processing, analysis, to realize monitoring the life-span of laser instrument.
Realizing the principle that the life-span directly assesses is: there is positive correlation between the working current of laser instrument and the luminous power of its output.As shown in Figure 3, wherein curve 1 is energy supply laser instrument P-I curve under normal circumstances, and curve 2 is the P-I curves in energy supply laser ageing situation.Distinct is between the two because along with the use of energy supply laser instrument, cause the factors such as resonant-cavity surface deterioration due to photochemical reaction, the light emitting power of energy supply laser instrument can be made to reduce, and threshold current increases, and efficiency declines.Therefore when permanent luminous power pattern exports, along with the use of energy supply laser instrument, the working current of laser instrument can slowly increase, and when current is excessive, can cause permanent damage to energy supply laser instrument.Therefore when permanent luminous power exports, the working current by on-line monitoring energy supply laser instrument realizes the life-span of direct-on-line monitoring laser instrument.
(ISO 17526-2003), using the working current of laser instrument as life-span judgment criteria, its expression formula is standard " Optics and optical instrumments-Lasers andlaser-related equipment-Lifetime of lasers ":
In formula, τ
aPC eOLlife-span (end oflife) during luminous power output (APC) permanent in laser instrument; I (τ
aPC eOL, α) be corresponding working current; I
0for the initial value of working current during energy supply laser instrument constant power output; I
th, 0for the initial value of laser threshold current; α is constant, and for high power semiconductor lasers, generally getting α is 80%.
Because of the I of high power semiconductor lasers
th, 0be generally about 100mA, and working current I
0for about 2A, just known I (τ
aPC eOL, α) ≈ 125%I
0.Therefore can laser instrument mission life under normal operation be defined as the permanent luminous power of laser instrument export time, the time corresponding when its working current raises 25%.
Usually, in engineering, and be not easy the working current directly obtaining laser instrument.If laser instrument produces product, man is serially connected with current sensor in laser works loop, then can carry out above-mentioned analysis according to the data of this sensor.If laser instrument production product man is non-nested current sensor in laser instrument inside, mechanism analysis method then can be adopted to be associated between merge cells power supply electric current with energy supply laser works electric current model, by directly measuring the indirect inspection that merge cells power supply electric current realizes laser works electric current, thus the life-span of laser instrument is monitored.
Be associated the foundation of model: be illustrated in figure 4 energy supply drive circuit for laser principle schematic.Because the forward conduction voltage of laser diode 15 is very stable, therefore when the working current of energy supply laser instrument increases x%, the electric power of laser instrument also can increase x%.Due to transformer station 220V supply voltage and lesser load more stable, therefore have DC-DC power source 13 and laser drive power (constant current source) 14 stable work in work, its power conversion efficiency is constant, when then the electric power of energy supply laser instrument increases x%, the power that merge cells power supply is supplied to energy supply laser circuit part also can increase x%, owing to standing, interior 220V DC voltage is more stable, the then supply current of energy supply laser drive power, the electric current of namely corresponding in merge cells power supply electric current supply energy supply laser drive power part can increase x%.So just, the working current carrying out the inner energy supply laser instrument of indirect inspection merge cells by directly measuring merge cells power supply electric current can be realized.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (3)
1. an energy supply laser ageing life-span on-line monitoring system for active electronic transformer, comprising: sensing unit, single-chip microcomputer, computing machine:
Sensing unit comprises voltage sensor, current sensor, and wherein, current sensor is installed on the point of incoming cables that direct supply is powered to merge cells, to gather merge cells supply current signal; Voltage sensor, is connected in parallel with merge cells, for gathering merge cells supply voltage signal;
The signaling interface of single-chip microcomputer is connected with current sensor and voltage sensor, for receiver voltage, current analog signal, and is converted into digital signal, sends to computing machine by communication bus;
Computing machine connects single-chip microcomputer and merge cells, receives the current signal data on merge cells supply voltage, current signal data and bus, provides related data for carrying out life-span monitoring.
2. the energy supply laser ageing life-span on-line monitoring system of a kind of active electronic transformer according to claim 1, is characterized in that, described current sensor is arranged on merge cells power supply line.
3. the energy supply laser ageing life-span on-line monitoring system of a kind of active electronic transformer according to claim 1, it is characterized in that, described single-chip microcomputer is with A/D modular converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520102519.0U CN204439756U (en) | 2015-02-12 | 2015-02-12 | The energy supply laser ageing life-span on-line monitoring system of active electronic transformer |
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| CN201520102519.0U CN204439756U (en) | 2015-02-12 | 2015-02-12 | The energy supply laser ageing life-span on-line monitoring system of active electronic transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168658A (en) * | 2016-08-31 | 2016-11-30 | 宋天斌 | A kind of device and method reducing voltage transformer secondary voltage drop |
| CN108320893A (en) * | 2017-01-17 | 2018-07-24 | 中国计量大学 | A kind of optical fiber transferring high voltage current transformer of eccentrically arranged type |
-
2015
- 2015-02-12 CN CN201520102519.0U patent/CN204439756U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168658A (en) * | 2016-08-31 | 2016-11-30 | 宋天斌 | A kind of device and method reducing voltage transformer secondary voltage drop |
| CN106168658B (en) * | 2016-08-31 | 2023-06-02 | 贵州电网有限责任公司 | Device and method for reducing secondary voltage drop of voltage transformer |
| CN108320893A (en) * | 2017-01-17 | 2018-07-24 | 中国计量大学 | A kind of optical fiber transferring high voltage current transformer of eccentrically arranged type |
| CN108320893B (en) * | 2017-01-17 | 2024-04-12 | 中国计量大学 | Offset type optical fiber transmission high-voltage current transformer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20180212 |