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 PDF

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Publication number
CN106841940A
CN106841940A CN201710025299.XA CN201710025299A CN106841940A CN 106841940 A CN106841940 A CN 106841940A CN 201710025299 A CN201710025299 A CN 201710025299A CN 106841940 A CN106841940 A CN 106841940A
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China
Prior art keywords
module
transmitting module
signal
output end
measuring device
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CN201710025299.XA
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Inventor
史文江
赵刚
刘洋
周明哲
李东明
沈全友
娄国娇
孙世广
李海峰
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Beijing Zhongke Genesis Science And Technology Development Co Ltd
XINGAN POWER SUPPLY COMPANY STATE GRID EAST INNER MONGOLIA ELECTRIC POWER Co Ltd
State Grid Corp of China SGCC
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Beijing Zhongke Genesis Science And Technology Development Co Ltd
XINGAN POWER SUPPLY COMPANY STATE GRID EAST INNER MONGOLIA ELECTRIC POWER Co Ltd
State Grid Corp of China SGCC
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Application filed by Beijing Zhongke Genesis Science And Technology Development Co Ltd, XINGAN POWER SUPPLY COMPANY STATE GRID EAST INNER MONGOLIA ELECTRIC POWER Co Ltd, State Grid Corp of China SGCC filed Critical Beijing Zhongke Genesis Science And Technology Development Co Ltd
Priority to CN201710025299.XA priority Critical patent/CN106841940A/en
Publication of CN106841940A publication Critical patent/CN106841940A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing 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

A kind of New insulated measuring device with electricity based on intelligent sensor technology
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.
CN201710025299.XA 2017-01-13 2017-01-13 A kind of New insulated measuring device with electricity based on intelligent sensor technology Pending CN106841940A (en)

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Application publication date: 20170613