CN206960569U - A kind of dry reactor presence states apparatus for evaluating - Google Patents
A kind of dry reactor presence states apparatus for evaluating Download PDFInfo
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- CN206960569U CN206960569U CN201720606379.XU CN201720606379U CN206960569U CN 206960569 U CN206960569 U CN 206960569U CN 201720606379 U CN201720606379 U CN 201720606379U CN 206960569 U CN206960569 U CN 206960569U
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Abstract
The utility model discloses a kind of dry reactor presence states apparatus for evaluating, the apparatus for evaluating includes inductance measurement unit, direct current resistance m easurem ent unit and temperature measurement unit, the inductance measurement unit, direct current resistance m easurem ent unit, temperature measurement unit are connected with single-chip microcomputer, and the single-chip microcomputer is connected with LCD display；The inductance measurement unit (1) includes colpitts oscillation circuit (11) and A/D converting units (12), inductance is converted into frequency signal by colpitts oscillation circuit, analog quantity is converted into digital pulse signal by A/D converting units, digital pulse signal is passed on single-chip microcomputer (4) by interface, this pulse signal is counted, data are handled and the value of tested inductance is obtained in computing, and are delivered to LCD display (5) display.Apparatus for evaluating provided by the utility model integrates measurement inductance, D.C. resistance and temperature, and measurement is simple and convenient, time saving and energy saving.
Description
Technical field
The utility model belongs to dry reactor in-site measurement technical field, more particularly to a kind of dry reactor scene shape
State apparatus for evaluating.
Background technology
Dry reactor is widely used in alternating current filter, DC fields wave filter in super high voltage direct current electricity transmission engineering current conversion station
It is limiting short-circuit current and the important primary equipment of filtering in current conversion station with DC fields smoothing reactor.At present, DLT 273-
2012《± 800kV extra-high voltage direct-current equipment preventive trial codes》、DLT 274-2012《± 800kV HVDC Equipments are handed over
Connect experiment》、DL/T 377-2010《HVDC Equipments acceptance test》It is required to Deng preventive trial and commissioning test code
Reactor D.C. resistance and inductance are measured when carrying out dry reactor.
Now often using instrument for measuring DC resistance measurement D.C. resistance, using LCR bridge measurement inductance, assessing reactor needs
Want two instruments to measure, test connection need to be repeated, onsite application inconvenience, reduce test efficiency.Meanwhile for direct current
For resistance, the measurement of temperature is most important for accurate measurement DC resistance.At present, in-site measurement reactor temperature is usual
The temperature of reactor ambient temperature and laser thermodetector measurement reactor certain point, these sides are measured using common thermometer
Formula can not accurately reflect the true temperature of reactor, and larger error is brought to measurement.
Utility model content
In view of the shortcomings of the prior art, the utility model provides a kind of dry reactor presence states apparatus for evaluating.It is described
Apparatus for evaluating integrates measurement inductance, D.C. resistance and temperature, and measurement is simple and convenient, time saving and energy saving.
The technical solution of the utility model is as follows：A kind of dry reactor presence states apparatus for evaluating, the apparatus for evaluating
Including inductance measurement unit 1, direct current resistance m easurem ent unit 2 and temperature measurement unit 3, the inductance measurement unit 1, D.C. resistance
Measuring unit 2, temperature measurement unit 3 are connected with single-chip microcomputer 4, and the single-chip microcomputer 4 is connected with LCD display 5；
The inductance measurement unit 1 includes colpitts oscillation circuit 11 and A/D converting units 12, and inductance is shaken by examining BZ
Swing circuit conversion and analog quantity is converted into digital pulse signal into frequency signal, A/D converting units, digital pulse signal is by connecing
Oral instructions are counted on single-chip microcomputer 4 to this pulse signal, and data are handled and the value of tested inductance is obtained in computing, and
LCD display 5 is delivered to show.
Further, the direct current resistance m easurem ent unit 2 is made up of measurement power supply 21 and detection and control section；Measurement electricity
Source requirement adjusts output voltage in real time according to output current, meets requirement of the different loads to voltage；Detection and control section by
Single chip machine controlling circuit, voltage x current sampling are formed with change-over circuit 22, LCD display 5, and voltage and current signal is synchronously adopted
Collection, measure D.C. resistance.
Further, the temperature measurement unit 3 includes grating sensor 31, multi-channel signal acquiring module 32 and spectrum
Analysis module 33, optical signal is gathered by grating sensor, spectral analysis module carries out spectral scan collection, can obtain each grating
The centre wavelength value of the optical signal of reflection, single-chip microcomputer processing unit can calculate what corresponding grating measured according to each centre wavelength value
Actual temperature.
Further, the apparatus for evaluating also includes printing device 6 and data line interface 7.
Operation principle of the present utility model is as follows：The utility model provides a kind of dry reactor presence states and assesses dress
Put, realize D.C. resistance, inductance, temperature survey three zones, specific requirement is as follows：
(1) direct current resistance m easurem ent.Output current scope is 0-40A, realizes the material of the temperature measured according to instrument and input
Expect the DC resistance that the conversion of resistance temperature constant needs.(resistance value converts as the following formula under different temperatures：R2=R1 (T+t2)/
(T+t1), R1, R2 are respectively the resistance value at temperature t1, t2 in formula；T is resistance temperature constant, and copper winding takes 235, aluminium around
Group takes 225.)
(2) inductance measurement.According to the different frequency of input, the inductance value under measurement different frequency is calculated.
(3) temperature survey.Dry reactor is enclosed by lattice coil and formed, the gap that two layers adjacent of coil is formed
For radiating.Due to shining upon, the temperature of male and female face and the temperature difference of inside and outside layer are larger, need to be passed in every layer of male and female face arrangement
Sensor, calculate average temperature value.Because DC fields smoothing reactor is higher, temperature survey transmission uses wireless mode.
Compared with prior art, the utility model has the advantages that：
(1) dry reactor D.C. resistance and inductance measurement can be achieved using a set of device provided by the utility model,
It is easy to live carrying, lifts field test efficiency.
(2) the utility model can more accurately measure reactor actual temperature, actual response dry reactor D.C. resistance
Value, authentic experiments data are provided for accurate evaluation reactor state.
Brief description of the drawings
Fig. 1 is dry reactor site assessment device appearance figure；
Fig. 2 is the component connection figure of dry reactor site assessment device；
Fig. 3 is the measurement process figure of dry reactor site assessment device；
Fig. 4 is that high-voltage charging low pressure measurement method measures D.C. resistance circuit theory diagrams；
Fig. 5 is that capacitance connecting three point type oscillator measures inductive circuit figure；
Fig. 6 is grating temperature-measurement principle figure.
Embodiment
The technical solution of the utility model is described in further details with reference to specific embodiment, but the utility model
It is not limited to following technical scheme.
Embodiment 1
A kind of dry reactor presence states apparatus for evaluating, the apparatus for evaluating include inductance measurement unit, D.C. resistance
Measuring unit and temperature measurement unit, the inductance measurement unit 1, direct current resistance m easurem ent unit 2, temperature measurement unit 3 with
Single-chip microcomputer 4 is connected, and the single-chip microcomputer 4 is connected with LCD display 5；The apparatus for evaluating also includes printing device 6 and data wire connects
Mouth 7.
Inductance measurement unit 1 includes colpitts oscillation circuit 11 and A/D converting units 12, and inductance is by examining BZ vibration electricity
Road is converted into frequency signal, and analog quantity is converted into digital pulse signal by A/D converting units, and digital pulse signal is passed by interface
Onto single-chip microcomputer 4, this pulse signal is counted, data are handled and the value of tested inductance is obtained in computing, and are transmitted
Shown to LCD display 5.
Direct current resistance m easurem ent unit 2 is made up of measurement power supply 21 and detection and control section；Power requirement is measured according to defeated
Go out electric current and adjust output voltage in real time, meet requirement of the different loads to voltage；Detection and control section control electricity by single-chip microcomputer
Road, voltage x current sampling are formed with change-over circuit 22, LCD display 5, to voltage and current signal synchronous collection, measure direct current
Resistance.
Temperature measurement unit 3 includes grating sensor 31, multi-channel signal acquiring module 32 and spectral analysis module 33, leads to
Grating sensor collection optical signal is crossed, spectral analysis module carries out spectral scan collection, can obtain the optical signal of each optical grating reflection
Centre wavelength value, single-chip microcomputer processing unit can calculate the actual temperature that corresponding grating measures according to each centre wavelength value.
Current domestic external pelivimetry D.C. resistance mainly has the direct method of measurement (voltmeter ammeter method), bridge measurement method (single armed
Bridge method, double bridge method), Fast Measurement Method (increase loop resistance circuit mutation method, high-voltage charging low pressure measurement method, dynamic
Fast charge method).The direct method of measurement is simplest method of testing, and its principle is to be passed through DC current, winding in winding is tested
Resistance on produce voltage drop, by the electric current for measuring winding both end voltage and passing through, electricity can be calculated according to Ohm's law
Resistance.Bridge measurement method includes wheatstone bridge method (Wheatstone bridge) and double bridge method (Kelvin bridge), mainly by using
Galvanometer judges whether bridge voltage signal is balanced to measure resistance.The basis of Fast Measurement Method is also Ohm's law, with winding
Based on equivalent D.C. resistance and inductance series model, by changing the time constant of precircuit, make winding current one
Determine to reach the quick measurement of stable realization under voltage as early as possible.The present embodiment provide dry reactor presence states apparatus for evaluating it is straight
Leakage resistance measurement is as shown in Figure 4 using the high-voltage charging low pressure measurement method in Fast Measurement Method, circuit theory diagrams.E in figure1>E2,
K is closed during measurement simultaneously1、K2, E1Winding is started to charge up, standby current table, when electric current reaches stationary value (E2/Rx) when disconnect
K1, the voltage for being added in winding both ends is E2, D.C. resistance is slightly measured after voltage stabilization, substantially reduces the charging interval.
Colpitts oscillation circuit is made up of series capacitance and inductor loop and positive feedback amplifier in the present embodiment, such as
Shown in Fig. 5.After switching on power, electric current from scratch, produces fluctuating signal, the intrinsic frequency of oscillating circuit LC resonant tanks in circuit
When rate is identical with a certain harmonic frequency, circuit produces resonance.Inductance L=1/ [f are tried to achieve using resonant frequency2×C1C2/(C1+C2)
×4π2]。
Grating is that optical fiber passes through special working process to change its refractive index, it is carried out specific wavelength anti-
Penetrate.The incident light of one wide range only meets that the optical signal of the minimum spectrum width of Wavelength matched condition is anti-after fiber grating
Penetrate, the optical signal of its commplementary wave length is transmitted into next fiber grating.When variation of ambient temperature, in the reflected light of fiber grating
Cardiac wave length can change (temperature is higher, and wavelength shift is bigger) therewith.Carried out by the reflection center wavelength of light for treating light-metering grid
The accurate measurement of digitlization, you can obtain the environment temperature of the stop position, as shown in Figure 6.
The use process of the apparatus for evaluating is as follows：
1. inductance measurement：Inductance is converted into frequency signal by colpitts oscillation circuit, analog quantity is converted into numeral
Amount, this pulse signal is passed on single-chip microcomputer by interface, this is counted, data are handled and computing obtain it is tested
The value of inductance, and send display to show.Two p-wires one are inserted on state evaluation device during measurement, other end connects respectively
It is connected on the lead plate at dry reactor both ends, inputs test frequency during delivery test, tests the inductance of dry reactor, with
Factory-said value is contrasted.
2. direct current resistance m easurem ent：System uses constant pressure and flow method, is made up of measurement power supply and detection and control section.Measurement
Power requirement adjusts output voltage in real time according to output current, meets requirement of the different loads to voltage.Detection and control section
Shown etc. and formed with change-over circuit, LCD by single chip machine controlling circuit, voltage x current sampling.Voltage and current signal is synchronously adopted
Collection, measure D.C. resistance.Two special DC resistance test lines are used during test, two p-wires one are respectively inserted in state and commented
Estimate the voltage (fine rule) of device, in electric current (thick line) hole, other end is connected on the lead plate at dry reactor both ends, root
According to the appropriately selected test electric current of test data over the years, the D.C. resistance of dry reactor is tested.
3. temperature survey：Temperature survey uses grating sensor, and grating is that optical fiber passes through special working process to change
Its refractive index, it is set to reflect specific wavelength.When variation of ambient temperature, the reflection center wavelength of light of fiber grating
It can change therewith.Accurate measurement is digitized by the reflection center wavelength of light for treating light-metering grid, you can obtain the grating position
The environment temperature put.This equipment gathers optical signal by sensor, carries out spectral scan collection by spectral analysis module, can obtain
To the centre wavelength value of the optical signal of each optical grating reflection, processing unit can calculate corresponding grating according to each centre wavelength value and measure
Actual temperature.During measurement temperature, grating sensor is arranged in the gap that two layers of coil of dry reactor is formed, in reactance
The equidistant orientation of device four respectively arrangement one sensor, by grating sensor line be inserted on state evaluation device (wireline mode) or
Start radio receiver (wireless mode), the gap that every two layers of coil is formed measures once, calculates the temperature-averaging of measurement
It is worth the reduced temperature of reactor D.C. resistance, the D.C. resistance of measurement is converted at a temperature of dispatching from the factory, is carried out with factory-said value
Contrast.
Claims (4)
1. a kind of dry reactor presence states apparatus for evaluating, it is characterised in that the apparatus for evaluating includes inductance measurement unit
(1), direct current resistance m easurem ent unit (2) and temperature measurement unit (3), the inductance measurement unit (1), direct current resistance m easurem ent unit
(2), temperature measurement unit (3) is connected with single-chip microcomputer (4), and the single-chip microcomputer (4) is connected with LCD display (5)；
The inductance measurement unit (1) includes colpitts oscillation circuit (11) and A/D converting units (12), and inductance is by examining BZ
Oscillating circuit is converted into frequency signal, and analog quantity is converted into digital pulse signal by A/D converting units, and digital pulse signal passes through
Interface is passed on single-chip microcomputer (4), and this pulse signal is counted, and data are handled and tested inductance is obtained in computing
Value, and it is delivered to LCD display (5) display.
2. dry reactor presence states apparatus for evaluating as claimed in claim 1, it is characterised in that the direct current resistance m easurem ent
Unit (2) is made up of measurement power supply (21) and detection and control section；Measurement power requirement adjusts defeated in real time according to output current
Go out voltage, meet requirement of the different loads to voltage；Detection and control section by single chip machine controlling circuit, voltage x current sampling with
Change-over circuit (22), LCD display (5) are formed, and to voltage and current signal synchronous collection, measure D.C. resistance.
3. dry reactor presence states apparatus for evaluating as claimed in claim 1, it is characterised in that the temperature measurement unit
(3) include grating sensor (31), multi-channel signal acquiring module (32) and spectral analysis module (33), pass through grating sensor
Optical signal is gathered, spectral analysis module carries out spectral scan collection, can obtain the centre wavelength value of the optical signal of each optical grating reflection,
Single-chip microcomputer processing unit can calculate the actual temperature for corresponding to grating and measuring according to each centre wavelength value.
4. the dry reactor presence states apparatus for evaluating as described in claims 1 to 3 is any, it is characterised in that the assessment
Device also includes printing device (6) and data line interface (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720606379.XU CN206960569U (en) | 2017-05-26 | 2017-05-26 | A kind of dry reactor presence states apparatus for evaluating |
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| CN201720606379.XU CN206960569U (en) | 2017-05-26 | 2017-05-26 | A kind of dry reactor presence states apparatus for evaluating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345831A (en) * | 2020-10-30 | 2021-02-09 | 广东电网有限责任公司广州供电局 | Direct-current resistance measuring device of ultra-high voltage transformer |
-
2017
- 2017-05-26 CN CN201720606379.XU patent/CN206960569U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345831A (en) * | 2020-10-30 | 2021-02-09 | 广东电网有限责任公司广州供电局 | Direct-current resistance measuring device of ultra-high voltage transformer |
| CN112345831B (en) * | 2020-10-30 | 2023-01-20 | 广东电网有限责任公司广州供电局 | Direct-current resistance measuring device of ultra-high voltage transformer |
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