CN106841940A - A kind of New insulated measuring device with electricity based on intelligent sensor technology - Google Patents
A kind of New insulated measuring device with electricity based on intelligent sensor technology Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
The invention discloses a kind of New insulated measuring device with electricity based on intelligent sensor technology, it is related to live detection field, including processor module, current transformer, the first signal condition transmitting module, voltage transformer, secondary signal conditioning transmitting module；The input connection current transformer of the first signal condition transmitting module, the input connection voltage transformer of secondary signal conditioning transmitting module；The output end of the first signal condition transmitting module connects the 3rd input of processor module, and the output end of secondary signal conditioning transmitting module connects the 4th input of processor module；The 5th input connection temperature humidity detection module of processor module.The present invention solves coupled problem of the weak magnetic signal under strong electromagnetic interference environment, reduces signal distortion；Simultaneously the built-in environment monitoring function of sensor realize temperature-compensating and humidity compensation, solve long-standing problem measuring device with electricity because caused by component temperature drift data consistency detection difference the drawbacks of.
Description
Technical field
The present invention relates to live detection field, more particularly to a kind of New insulated based on intelligent sensor technology is powered
Detection means.
Background technology
To the safe operation of power network, the measuring device with electricity that insulate can realize set to the dielectric relationship of transforming plant primary equipment
The live testing of pipe, arrester, the insulation characterisitic of capacitance type equipment and master iron core earth current, so that it is current to grasp equipment
State of insulation, ensures equipment safety operation, or maintenance provided auxiliary decision-making.Since 21 century, electronic technology, meter
The ambits such as calculation machine technology, artificial intelligence are interpenetrated and contacted increasingly closely, are applied in numerous areas and achieved good
Good effect, while also achieving greatly breakthrough in terms of the research of high voltage electric equipment insulation characterisitic on-line checking.In state
It is interior, State Network Electric Power Research Institute, China Electric Power Research Institute, Tsing-Hua University, Wuhan University, the Central China University of Science and Technology, Xi'an
The colleges and universities such as university of communications and scientific research institutions have all put into substantial amounts of man power and material and have carried out research and development, and have had reality
On-line measuring device put into operation, these on-line measuring devices can effectively find some equipment for having insulation defect, right
Insulation tube arrester serves certain effect.The each side knowledge such as artificial intelligence, genetic algorithm, expert diagnostic system owe
Lack so that even if we can not predict while can obtain substantial amounts of sampled data information according to known measurement result
The insulation status of equipment, it is difficult to Accurate Diagnosis are made to the state of insulation of equipment by expert diagnostic system, so coming from present
See, the application effect of online measuring technique is also not fully up to expectations, on-line checking distance it is anticipated that economic benefit and society imitate
Benefit also has a certain distance.
The deficiency of on-line detecting system, live detection can preferably be made under current technical conditions up using live detection technology
The judgement that data incorporate experience into value can play preferably effect to the potential faults of equipment investigation and maintenance.At present both at home and abroad
Carry out the research of live detection technology, the insulation for being mainly used in the primary equipments such as capacitance type equipment, arrester, all kinds of sleeve pipes is special
Property detection, key technical problems need further research and solve.The various conceptual designs of live detection technology it is each
It is long, but have common drawback：The interference of anti-harmonic wave and anti-power network power frequency strong-electromagnetic field are poor, especially extraneous co-channel interference to voltage with
When the interference of two sampling passages of electric current is uneven, performance more substantially, causes its environmental suitability poor.
Impedance angle, dielectric dissipation factor, current in resistance property, capacitive electricity are contained in the leakage current of transforming plant primary equipment
Stream, equivalent capacitance amount etc. characterize the characteristic parameter of apparatus insulated state, therefore leakage current implementation live detection can be known
The state of insulation of equipment.Transformer station electromagnetic environment is complicated, equipment leakage current weak output signal, in addition in power network higher hamonic wave work
With and ambient temperature and humidity influence, it is very big on the influence of the measurement result of live detection equipment.General live detection equipment and institute
There is the situation that signal to noise ratio is relatively low, distortion is larger, measurement in coupling, transmission and detection process with the output signal of sensor
Result is difficult to accurately reflect the state of insulation of equipment, and these factors cause the live detection equipment generally existing for much coming into operation
The defect that certainty of measurement is poor, data dispersiveness is big, device is difficult to play a role.
The content of the invention
In view of the drawbacks described above of prior art, the technical problems to be solved by the invention are to provide a kind of based on intelligence biography
The New insulated measuring device with electricity of sensor technology.It is intended to for asking that current measuring device with electricity exists in use
Topic, lays particular emphasis on solution weak signal and inaccurate technical problem is measured under complex electromagnetic environment, is adjusted by processor module, signal
Reason transmitting module, enhancing output signal antijamming capability, reduction distortion.Avoid the strong electromagnetic and ambient influnence such as temperature of outside
It is larger that the change of humidity will cause detection data to fluctuate, in some cases initiating device false alarm.
To achieve the above object, the invention provides a kind of New insulated live detection dress based on intelligent sensor technology
Put, it is characterised in that：Including processor module, current transformer, the first signal condition transmitting module, voltage transformer, second
Signal condition transmitting module, temperature humidity detection module；
The output end of the current transformer connects the input of the first signal condition transmitting module；The voltage is mutual
The output end of sensor connects the input that the secondary signal nurses one's health transmitting module；
First output end of the processor module connects the control end of the first signal condition transmitting module, the place
The second output end for managing device module connects the control end that the secondary signal nurses one's health transmitting module；
The output end of the first signal condition transmitting module connects the 3rd input of the processor module, and described the
The output end of binary signal conditioning transmitting module connects the 4th input of the processor module；
The output end of the temperature humidity detection module connects the 5th input of the processor module.
In the technical scheme, by processor module, signal condition transmitting module, strengthen the anti-interference energy of output signal
Power, reduction distortion.Detection is synchronized to Current Mutual Inductance signal and mutual induction of voltage signal by processor module, improve electric current,
The synchronism of voltage detecting, it is to avoid the two has time delay and causes certainty of measurement to be deteriorated, improves Insulation monitoring precision.It is provided with temperature
Humidity detecting module, is compensated by temperature and humidity and offsets the influence that component itself temperature drift and drift are caused to signal, maximum
Limit reduces influence of the environmental factor to measurement result.
Furthermore, also including memory module；The memory module is bi-directionally connected with the processor module.In the skill
In art scheme, memory module is provided with, the input of on-line tuning sensor and output characteristics can preset, to linear
Degree, angular difference are preset as the configuration of the inherent characteristic parameter of sensor, improve the adaptability of detection means.
Furthermore, the output end of the first signal condition transmitting module is input into the 3rd of the processor module the
An A/D conversion modules are connected between end；The output end and the processor module of the secondary signal conditioning transmitting module
The 4th input between be connected with the 2nd A/D conversion modules.In the technical scheme, will be simulated by A/D conversion modules and believed
Data signal number is converted to, the noise immunity of data is improved.
Furthermore, the processor module is configured as：
Synchronous sampling signal is sent to an A/D conversion modules and the 2nd A/D conversion modules, an A/ is gathered
D conversion modules and the mutual inductance current value and mutual voltage value of the output of the 2nd A/D conversion modules；
According to the mutual inductance current value and mutual voltage value, dielectrical loss factor or equivalent capacitance amount are solved.
In the technical scheme, process its module by mutual inductance current value and mutual voltage value solve dielectrical loss factor or
Equivalent capacitance amount, realizes that insulating properties are evaluated.
Furthermore, the current transformer is high accuracy nano microcrystalline current transformer.
In the technical scheme, realized using the high accuracy punching nano microcrystalline current transformer of novel magnetic materials strong
Weak magnetic signal coupling under electromagnetic interference environment.
Furthermore, the first signal condition transmitting module and secondary signal conditioning transmitting module include amplifying
Circuit, filter circuit.In the technical scheme, the accuracy of signal is improved by filter circuit.By modulation amplifying circuit, have
Effect control signal nurses one's health the programming amplifying of transmitting module.
Furthermore, the main control chip of the processor module is high-speed digital video camera chip.In the technical side
In case, the treatment of apparatus insulated status signal is realized using high performance digital signal process chip, possess anti-interference higher
Energy.Strengthen the antijamming capability of measuring device with electricity using high-speed digital video camera technology, improve accuracy of detection, reduce data
Dispersiveness.Signal distortion effectively is easily caused in coupled transfer and detection process of the reduction weak signal under complex electromagnetic environment,
The state of insulation of live detection data can accurately be shown；
The beneficial effects of the invention are as follows：The present invention strengthens output signal by processor module, signal condition transmitting module
Antijamming capability, reduction distortion.Detection is synchronized to Current Mutual Inductance signal and mutual induction of voltage signal by processor module, is carried
High current, the synchronism of voltage detecting, it is to avoid the two has time delay and causes certainty of measurement to be deteriorated, improve Insulation monitoring precision.If
Temperature humidity detection module is equipped with, is compensated by temperature and humidity and is offset the shadow that component itself temperature drift and drift are caused to signal
Ring, influence of the environmental factor to measurement result is reduced to greatest extent.
Brief description of the drawings
Fig. 1 is the system block diagram of the embodiment of the invention.
Fig. 2 is the equivalent model figure of transforming plant primary equipment；
Fig. 3 is the dielectrical loss phasor diagram of transforming plant primary equipment；
Fig. 4 is state of insulation signal processing flow figure；
Fig. 5 is the equivalent circuit diagram of insulation measuring device with electricity；
Fig. 6 is the algorithm flow chart based on wavelet transformation and sinwave parameter Method；
Fig. 7 is the magnetization characteristic figure of nano microcrystalline magnetic core；
Fig. 8 is the processor module circuit block diagram of the embodiment of the invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples：
As shown in figures 1-8, in the first embodiment of the invention, there is provided a kind of New insulated based on intelligent sensor technology
Measuring device with electricity, including processor module 101, current transformer 102, the first signal condition transmitting module 104, mutual induction of voltage
Device 103, secondary signal conditioning transmitting module 105, temperature humidity detection module 107；
The output end of the current transformer 102 connects the input of the first signal condition transmitting module 104；It is described
The output end of voltage transformer 103 connects the input that the secondary signal nurses one's health transmitting module 105；
First output end of the processor module 101 connects the control end of the first signal condition transmitting module 104,
Second output end of the processor module 101 connects the control end that the secondary signal nurses one's health transmitting module 105；
The output end of the first signal condition transmitting module 104 connects the 3rd input of the processor module 101,
The output end of the secondary signal conditioning transmitting module 105 connects the 4th input of the processor module 101；
The output end of the temperature humidity detection module 107 connects the 5th input of the processor module 101.
A kind of New insulated measuring device with electricity based on intelligent sensor technology for providing in the present embodiment, also includes
Memory module 106；The memory module 106 is bi-directionally connected with the processor module 101.
In the present embodiment, the output end and the processor module 101 of the first signal condition transmitting module 104
An A/D conversion modules are connected between 3rd input；The output end of secondary signal conditioning transmitting module 105 with it is described
The 2nd A/D conversion modules are connected between 4th input of processor module 101.
In the present embodiment, the processor module 101 is configured as：
Synchronous sampling signal is sent to an A/D conversion modules and the 2nd A/D conversion modules, an A/ is gathered
D conversion modules and the mutual inductance current value and mutual voltage value of the output of the 2nd A/D conversion modules；
According to the mutual inductance current value and mutual voltage value, dielectrical loss factor or equivalent capacitance amount are solved.
In the present embodiment, the current transformer 102 is high accuracy nano microcrystalline current transformer 102.
In the present embodiment, the first signal condition transmitting module 104 and secondary signal conditioning transmitting module 105
Including amplifying circuit, filter circuit.
In the present embodiment, the main control chip of the processor module 101 is high-speed digital video camera chip.In this reality
Apply in example, the treatment of apparatus insulated status signal realized using 32 Floating-point DSPs of high performance digital signal process chip, possess compared with
Interference free performance high.
In the present embodiment, bus interface circuit 108 is additionally provided with for the communication with the outside world of the processor module 101 is provided
Interface.
Additionally, in the present embodiment, processor module 101 is also controlled by signal condition transmitting module, setting electric current
The gain of transformer 102, the output signal of voltage transformer 103, and data carry out programming amplifying, and by processor module 101
Data are filtered with control, and Configuration Online or modification are realized to parameters such as system voltage grade, primary equipment types.Together
When, processor module 101 goes back input and the output characteristics of on-line tuning sensor：The linearity, angular difference are used as the intrinsic of sensor
Characterisitic parameter is configured, with very strong adaptability；And possess the functions such as fault self-diagnosis, can be real by self-diagnostic function
Existing fault alarm (such as CT broken strings, abnormal signal or communication failure).
The invention will be further described below and explains.
1), the definition on dielectric loss
Dielectric loss tan δ are one of important indicators of measurement primary equipment insulating properties, when apparatus insulated intact, are flowed through
The electric current i of insulationcLeading voltage uxPhaseIt is pi/2 radian, as shown in Figure 3.There is defect in insulation after equipment long-term work,
The curent change for now flowing through insulation is ix=ic+ir(ic、irVector), ir/icRatio is dielectric loss, according to medium
Loss tan δ, it can be determined that whether equipment has insulation defect, and its equivalent circuit is as shown in Figure 2.
2) technical scheme overall flow
In the present embodiment, lay particular emphasis on using high-precision intelligent sensor (providing high quality sample signal)+high-speed figure
The Technical Architecture of signal processing unit (intensifier antijamming capability), hardware components are soft using 32 float-point DSPs at a high speed
Part algorithm uses sine parameter analytic approach, to reach the antijamming capability of lifting measuring device with electricity, improve the mesh of accuracy of detection
, the signal processing flow of device is as shown in Figure 4.
3), know-why
By taking capacitor type voltage transformer (CVT) as an example, it is analyzed according to its internal structure and electrical principle, it can be set up
Equivalent electrical model is as shown in Figure 5.Wherein：C1-high-voltage capacitance；C2-middle voltage capacitance；L1-middle pressure transformer first winding；
L2-compensation reactor；I1-capacity current；I2-middle pressure transformer no-load current；Ir-current in resistance property；R-EFFECTIVE MEDIUM electricity
Resistance；Ix-total current；U1-high-voltage capacitance partial pressure；U2-middle voltage capacitance partial pressure；Ux-working voltage.
According to the equivalent electric model analysis of equipment, the dielectric dissipation factor tan δ of equipment can be carried out using sine parameter analytic approach
Calculate, sine parameter analytic approach applies orthogonality of trigonometric function, and the sample frequency fs of signal is the integral multiple of signal frequency f
When meet the condition that trigonometric function orthogonality must possess.Equipment leakage current signal Ix, middle voltage capacitance C2 tappings output letter
The sampling of number U2 (reference voltage) must use synchronizing signal Sampling techniques, and the part is realized by high-speed synchronous sampling hardware.
If flowing through the leakage current of apparatus insulated structure：
I=Im*sin (ω t+ φ i) (1)
The voltage at equipment two ends：
U=Um*sin (ω t+ φ u) (2)
Sine parameter analytic approach is that, by analog/digital conversion, after electric current, voltage signal sliding-model control, Applied Digital is believed
Number treatment technology, tries to achieve sine wave parameter Im, φ i, Um, φ u, then calculates the phase difference of the advanced u of i, and then tries to achieve medium
A kind of method of loss angle δ.
Electric current i (t) voltage u (t) is deployable to be：
I (t)=D0*sin ω t+D1*cos ω t (3)
U (t)=C0*sin ω t+C1*cos ω t (4)
Wherein, D0=Im*cos φ i, D1=Im*sin φ i, C0=Um*cos φ u, C1=Um*sin φ u in formula.
It can thus be concluded that：
φ i=tan-1(D1/D0) (5)
φ u=tan-1(C1/C0) (6)
Sampled to signal i (t) and u (t), after trying to achieve D0, D1, C0, C1 with digital signal processing algorithm, you can by formula
(3) and (4) calculate φ i and φ u, and design impedance angle φ=φ i- φ u, and then try to achieve equipment dielectric loss angle δ：
δ=(pi/2)-φ=(pi/2)-(φ i- φ u) (7)
Equipment dielectric loss angle is tried to achieve, coupling system voltage u (is tried to achieve) by reference voltage intrinsic standoff ratio, computing device insulation is special
Property parameter：
Tan δ (%)=tan δ * 100 (8)
Cx=i*cos δ/(ω * u) (9)
Tan δ (%) are dielectric dissipation factor in formula, and Cx is equivalent capacitance amount, and ω is angular frequency, and i is leakage current, and u is
System voltage value.
4), the wavelet noise based on sinwave parameter Method
For continuous periodic jamming signals, can be eliminated using the orthogonality of trigonometric function of sinwave parameter Method and adopted
Harmonic wave and DC component in sample signal.And for the random pulse interference signal for occurring, then given using the method for wavelet noise
To eliminate.Its algorithm flow can simply be expressed as shown in Fig. 6.
Measurement signal is separated into matrix form first to be stored, denoising is carried out again after wavelet decomposition, can eliminate with
Machine impulse disturbances, and store the data after de-noising.Using sinwave parameter Method harmonic carcellation component, and calculated using formula
tanδ.The tan δ of capacitance type equipment are generally 0.001-0.02 in operation, and the threshold values of δ is about 0.01, therefore δ measurement errors is exhausted
≤ 0.001-0.002 is answered to value.The digitized measurement of δ is the electric current I and the electricity being applied in insulation that first measurement flows through insulation
First phase angular difference φ between pressure U, then calculate tan δ.Because φ → pi/2, and the absolute value of δ measurement errors requirement very little, i.e., to φ
Accuracy of measurement requirement it is very high.
5), on the introduction of high accuracy nano microcrystalline current transformer
Transformer station's electromagnetic environment is complicated, and device type is various, and its leakage current scope is generally 0.3~1000mA, amplitude
Span is larger, and equipment ground band iron width is usually 20mm or so, therefore it is required that current transformer has precision higher and one
Cause property, the technical program followed in the selection of transformer core it is following some：
A) magnetic core for being used for transformer must have high magnetic conductivity, letting out for 5mA or so under extremely weak magnetic field
Leakage current (the typical leak current value of condenser bushing), acts on the magnetic field intensity on magnetic core and there was only ten thousand/several oersteds
(Oe), than small an order of magnitude of transformer core operating fields of common 0.1 class precision, thus to transformer core material
Selection proposes very high request；B) thicker enamel-covered wire coiling secondary coil is used, to reduce the D.C. resistance of coil, is conducive to
Improve precision；C) rationally determine magnetic core size, magnetic core size is excessive, reduces operating fields, increase coil D.C. resistance, shadow
Ring transformer precision；And magnetic core size is too small, cause the impedance of coil too small, be unfavorable for the raising of transformer precision；D) to mutual
Sensor takes effective shielding protection measure.
Conventional current transformer core material mainly has magnetically soft alloy 1J50,1J79 (permalloy) and 1J85 at present
(iron-nickel alloy) series etc., novel nano micro crystal material is also widely applied in recent years because of its good magnetic property, and two
Plant magnetization characteristic of the magnetic core under low-intensity magnetic field as shown in Figure 7.As shown in Figure 7, under low-intensity magnetic field, nano microcrystalline magnetic core is led
Magnetic property is to sum up analyzed apparently higher than conventional soft magnetic alloy core, and the technical program uses punching nano microcrystalline Current Mutual Inductance
Device is used as intelligence sensor core component.
6) gathered on current transformer data intelligence
Sensor needs the long-term stable operation under the complex electromagnetic environment of transformer station, ordinary sensors by production technology and
The limitation of core material performance, its linearity and angular difference are difficult to reach uniformity higher, are to realize sensing using programmable way
A kind of feasible pattern of device performance improvement, the technical program followed in the development process of Intelligent current sensor it is following some：
A) magnetic property of the core material under low-intensity magnetic field, ensures the accuracy of detection (depending on material property) of weak signal；B) transformer
Once, the uniformity of secondary transmission angular difference, influences accuracy of detection；C) reliability of long-term work and steady under strong electromagnetic interference environment
It is qualitative；D) programming amplifying and active power filtering are used, strengthens the signal to noise ratio of output signal, reduction signal is in coupling and transmitting procedure
Distortion.
As shown in figure 1, divided by function, in order to realize current transformer data acquisition, it is necessary to comprising following functional module：
A) punching nano microcrystalline current transformer；B) signal condition transmitting module；C) processor module；D) memory cell is (non-volatile
Property memory)；E) EBI；F) temperature humidity detection module (integrated semiconductor wet sensitive, temperature-sensitive element)；
Be can be seen that from structure function block diagram, the current sensor of the present embodiment has following different from common current sensor
The characteristics of：A) the secondary singal pick-up of current transformer, amplification and active power filtering realize intellectuality, by signal condition transmitting module
Processed；B) Configuration Online (IAP modes) of inherent characteristic parameter, inner setting is carried out by processor module；C) have total
Line interface and communication；D) sensor fault self diagnosis, is diagnosed by sensor itself；E) working environment detection, wet by temperature
Degree detection module collection environmental data.
7) on processor module
In the present embodiment, using dsp processor as processor module main control chip.In the present embodiment, entirely
The core of measuring device with electricity is dsp processor, and DSP has the speed of service of powerful data-handling capacity and high speed, to mesh
Before untill, the DSP of various models the synchronous data collection measurement of power system, harmonics restraint, electric energy quality monitoring, power network without
It is obtained in the common signal treatment of the power system such as work(compensation and relay protection and is widely applied, with DSP technology not
Disconnected development and maturation, applications of the DSP in electric power observation and control system can be more and more extensive.
The data volume that considers measuring device with electricity is larger, Fourier transformation computation amount is big, arithmetic speed requirement is high, letter
Number treatment response be the features such as will seek quickness, with reference to the technical merit and applicable cases of the processor of various models at this stage, this technology
The digital signal processor of scheme selects the TMS320F28335 Floating-point DSP controllers of TI companies, and the device dominant frequency is up to
150MHz, is transported using the command operating mode of the Harvard pipeline organization of multibus, special hardware multiplier and quick DSP
Calculate instruction, powerful floating-point operation ability, with processing speed is fast, Universal joint, peripheral hardware aboundresources, good stability, precision
High the characteristics of, be very suitable for applying carries out state of insulation letter in real-time, stability requirement measuring device with electricity very high
Number treatment.
TMS320F28335 typical characteristics are as follows：A) using Harvard pipeline organization, interrupt response can be quickly performed, and
With unified memory headroom, complicated math function is realized；B) powered using inside 1.9V, outside 3.3V powers；C) 6 passage
Dma controller；D) 8 external interrupts；E) 18 PWM outputs；F) 6 event capturing inputs；G) timer of 3 32；
H) there are 16 12 bit A/D converters of ALT-CH alternate channel.
TMS32OF28335 can complete one 1024 points of FIR algorithm within a few tens of milliseconds, quickly can accurately calculate
Go out related data.Fig. 8 gives DSP main control unit system block diagrams.Including dsp chip, clock/reset circuit, jtag interface electricity
Road, power circuit, memory, AD interface circuits, CAN interface circuit etc..
Each functional module description of processor module：
(l) reset circuit：Using electrification reset, when reset pin XRS is low level, DSP resets.By power supply apparatus
TPS767D301 provides reset signal RSTn_TPS767D.It is correct to initialize DSP, should ensure that XRS for low level and at least
Kept for 3 CLKOUT cycles, while after the power-up, the crystal oscillator of the system generally requires the stationary phase of 100~200ms.
Once powering up, its output voltage follows input voltage to TPS767D301, when output voltage reaches the minimum voltage for starting RESET
When, pin RESET output low levels, and 200ms is at least kept, required so as to reach DSP resets；
(2) clock circuit：Clock unit uses external clock, and external clock reference directly is accessed into X2/CLKIN pins, frequency
Rate is 25MHz, and X1 should be grounded；
(3) JTAG emulation interfaces：TMS320F28335 has the JTAG emulation interfaces of standard, should have on designed system plate
The emulation interface of 14 pins, the interface is directly accessed by emulator；
(4) the signal DB [0 of 16 of AD outputs:15] XD [0 of DSP is sent directly into by parallel port:15] interface is processed
Data after AD conversion；DSP sends the control that synchronous sampling signal CONVST_DSP realizes sampling voltage, current synchronization to AD
System；
(5) DSP output two-way relay control signals RLY0, RLY1 realize the control to programmable amplifying circuit；
(6) DSP is realized to RTC clock, the control of memory by iic bus SCL, SDA of two-wire system.
To sum up, traditional measuring device with electricity compares the exploitation design for focusing on signal transacting hardware and software, and ignores sensing
The performance of device, the quality of signal source directly determines the efficiency of measuring device with electricity again.Although current digital signal processing hardware system
System and related software algorithm comparative maturity, but because the quality of ordinary sensors output signal is in transformer station's complexity electromagnetism ring
It is difficult to ensure that under border, cause the application effect of measuring device with electricity can not be fully up to expectations, many research institutions have opened in recent years
Starting weight regards the problem of this respect.The present invention on the basis of a large amount of electrification detection system operating experiences are accumulated, with reference to currently advanced
Computer hardware and software engineering develop intelligence sensor and high performance digital signal treatment hardware platform, for powered
Detect that the problem for existing proposes innovative solution, possess following novelty relative to traditional live detection solution：
A) transformer magnetic material using novel nano crystallite and experiment proves that, performance indications are better than using conventional magnetic
The transformer of material, solves coupled problem of the weak magnetic signal under strong electromagnetic interference environment, reduces signal distortion；
B) sensor realizes intellectuality, and novelty is realized logical between sensor and signal processing unit using EBI
News, so that sensor possesses signal adaptive function, solve general sensor performance because of production technology, material property
The limitation brought；
C) the built-in environment monitoring function of sensor realizes temperature-compensating and humidity compensation, solves long-standing problem band electric-examination
Survey device is the drawbacks of data consistency detection difference caused by component temperature drift.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Need creative work just can make many modifications and variations with design of the invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (7)
1. a kind of New insulated measuring device with electricity based on intelligent sensor technology, it is characterised in that：Including processor module,
Current transformer, the first signal condition transmitting module, voltage transformer, secondary signal conditioning transmitting module, temperature humidity detection
Module；
The output end of the current transformer connects the input of the first signal condition transmitting module；The voltage transformer
Output end connect the input that the secondary signal nurses one's health transmitting module；
First output end of the processor module connects the control end of the first signal condition transmitting module, the processor
Second output end of module connects the control end that the secondary signal nurses one's health transmitting module；
The output end of the first signal condition transmitting module connects the 3rd input of the processor module, second letter
The output end of number conditioning transmitting module connects the 4th input of the processor module；
The output end of the temperature humidity detection module connects the 5th input of the processor module.
2. a kind of New insulated measuring device with electricity based on intelligent sensor technology as claimed in claim 1, its feature exists
In：Also include memory module；The memory module is bi-directionally connected with the processor module.
3. a kind of New insulated measuring device with electricity based on intelligent sensor technology as claimed in claim 1, its feature exists
In：First is connected between the output end of the first signal condition transmitting module and the 3rd input of the processor module
A/D conversion modules；Between the output end and the 4th input of the processor module of the secondary signal conditioning transmitting module
It is connected with the 2nd A/D conversion modules.
4. a kind of New insulated measuring device with electricity based on intelligent sensor technology as claimed in claim 3, its feature exists
In the processor module is configured as：
Synchronous sampling signal is sent to an A/D conversion modules and the 2nd A/D conversion modules, an A/D is gathered and is become
Mold changing block and the mutual inductance current value and mutual voltage value of the output of the 2nd A/D conversion modules；
According to the mutual inductance current value and mutual voltage value, dielectrical loss factor or equivalent capacitance amount are solved.
5. a kind of New insulated measuring device with electricity based on intelligent sensor technology as claimed in claim 1, its feature exists
In：The current transformer is high accuracy nano microcrystalline current transformer.
6. a kind of New insulated measuring device with electricity based on intelligent sensor technology as claimed in claim 1, its feature exists
In：The first signal condition transmitting module and secondary signal conditioning transmitting module include amplifying circuit, filter circuit.
7. a kind of New insulated measuring device with electricity based on intelligent sensor technology as claimed in claim 1, its feature exists
In：The main control chip of the processor module is high-speed digital video camera chip.
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| CN201710025299.XA CN106841940A (en) | 2017-01-13 | 2017-01-13 | A kind of New insulated measuring device with electricity based on intelligent sensor technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966925A (en) * | 2017-11-15 | 2018-04-27 | 北京理工大学 | A kind of high-precision multiple signals data testing system and test method based on DSP28335 |
| CN108508278A (en) * | 2018-04-03 | 2018-09-07 | 哈尔滨理工大学 | Dielectric Posts method and system based on variation mode decomposition and sinwave parameter Method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001060827A (en) * | 1999-08-19 | 2001-03-06 | Alps Electric Co Ltd | Microstrip line type voltage controlled oscillator |
| CN201285600Y (en) * | 2008-11-07 | 2009-08-05 | 深圳市聚奥能电子科技有限公司 | Multi-parameter monitoring digital recorder instrument |
| CN102128971A (en) * | 2011-01-13 | 2011-07-20 | 华北电力大学 | Insulated and charged testing device for capacitive equipment and method thereof |
| CN102628919A (en) * | 2012-04-25 | 2012-08-08 | 上海交通大学 | Transformer bushing insulation state on-line monitoring system |
| CN103257280A (en) * | 2013-04-16 | 2013-08-21 | 西安工程大学 | Capacitive equipment dielectric loss monitoring device based on electric field sensor and monitoring method |
| CN203204080U (en) * | 2013-03-20 | 2013-09-18 | 山东电力集团公司济宁供电公司 | Bushing dielectric loss on-line monitoring device based on B code timing |
| CN203422419U (en) * | 2013-09-13 | 2014-02-05 | 国家电网公司 | Electrified tester for zinc oxide lightning arrester |
| CN104142422A (en) * | 2013-05-08 | 2014-11-12 | 伍俊 | Transformation substation leakage current and capacitive current online monitoring management system and working method thereof |
-
2017
- 2017-01-13 CN CN201710025299.XA patent/CN106841940A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001060827A (en) * | 1999-08-19 | 2001-03-06 | Alps Electric Co Ltd | Microstrip line type voltage controlled oscillator |
| CN201285600Y (en) * | 2008-11-07 | 2009-08-05 | 深圳市聚奥能电子科技有限公司 | Multi-parameter monitoring digital recorder instrument |
| CN102128971A (en) * | 2011-01-13 | 2011-07-20 | 华北电力大学 | Insulated and charged testing device for capacitive equipment and method thereof |
| CN102628919A (en) * | 2012-04-25 | 2012-08-08 | 上海交通大学 | Transformer bushing insulation state on-line monitoring system |
| CN203204080U (en) * | 2013-03-20 | 2013-09-18 | 山东电力集团公司济宁供电公司 | Bushing dielectric loss on-line monitoring device based on B code timing |
| CN103257280A (en) * | 2013-04-16 | 2013-08-21 | 西安工程大学 | Capacitive equipment dielectric loss monitoring device based on electric field sensor and monitoring method |
| CN104142422A (en) * | 2013-05-08 | 2014-11-12 | 伍俊 | Transformation substation leakage current and capacitive current online monitoring management system and working method thereof |
| CN203422419U (en) * | 2013-09-13 | 2014-02-05 | 国家电网公司 | Electrified tester for zinc oxide lightning arrester |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966925A (en) * | 2017-11-15 | 2018-04-27 | 北京理工大学 | A kind of high-precision multiple signals data testing system and test method based on DSP28335 |
| CN108508278A (en) * | 2018-04-03 | 2018-09-07 | 哈尔滨理工大学 | Dielectric Posts method and system based on variation mode decomposition and sinwave parameter Method |
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Application publication date: 20170613 |