CN204666717U - A kind of voltage-limiting surge protector current in resistance property on-Line Monitor Device - Google Patents
A kind of voltage-limiting surge protector current in resistance property on-Line Monitor Device Download PDFInfo
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- CN204666717U CN204666717U CN201520348261.2U CN201520348261U CN204666717U CN 204666717 U CN204666717 U CN 204666717U CN 201520348261 U CN201520348261 U CN 201520348261U CN 204666717 U CN204666717 U CN 204666717U
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Abstract
The utility model discloses a kind of voltage-limiting surge protector current in resistance property on-Line Monitor Device, this device comprises voltage signal acquisition module, current signal collection module, dsPIC chip processing module, output module and external clock module, voltage signal acquisition module, current signal collection module and external clock module are connected with dsPIC chip processing module by A/D translation interface, and output module is connected with dsPIC chip processing module; The utility model can effective coordination on-line monitoring current component distinguish extract problem; the expense that on-line monitoring voltage-limit type SPD current in resistance property device is produced can be reduced simultaneously; facilitate local networking to monitor, can effectively reduce because of cannot the electrical fire that causes of Timeliness coverage or overvoltage protection situation about losing efficacy after SPD deterioration.
Description
Technical field
The utility model relates to thunder and lightning prevention apparatus technical field, is a kind of voltage-limiting surge protector current in resistance property on-Line Monitor Device specifically.
Background technology
Surge protector (SPD) mainly discharges rapidly by dividing technology pulse energy to realize overvoltage protection function with the voltage magnitude on limiting device and circuit; its performance not only affects the security of whole distribution system, communication system, is also related to the economic benefit of operational system.The high-pressure system lightning arrester occurred from 20th century, low-voltage circuit Special electric surge protector till now, all to improve its separation capacity for final goal.The type of existing Anti-surging device mainly contains switching mode and votage limit type two kinds, and voltage-limiting surge protector utilizes zinc paste for main material, at eighties of last century beginning of the eighties, is mark by the Zinc-oxide piezoresistor of Japanese Matsushita Electric Industrial company utility model.In low-voltage distribution system, because lasting normal operating voltage is low, the advantageous of zinc oxide valve plate obtains more outstanding.In actual production; the B+C type Design Mode that part surge protector adopts, is namely added with one-level discharging gap or gas-discharge tube at votage limit type member forward end, this way; usually just in order to increase the discharge capacity of surge protector and reduce residual voltage, the problem of Leakage Current cannot be solved.Due to zinc paste surge protector in operational process often because the pollution of Impulse Voltage, sleet, dust causes internal wetted to be got dirty; and then there is aging, deteriorated phenomenon; namely Leakage Current becomes large, if non-Timeliness coverage, is easy to lead to electrical fire accident.
At present; solution for this problem normally adopts off-line annual check system; judge that whether it is aging, deteriorated by the Leakage Current detecting surge protector; for the monitoring of Leakage Current; usual utilization be the total Leakage Current of punching Luo-coil collection, processing unit is not distinguished current internal composition usually.
What adopt in such as " a kind of device of automatic monitoring voltage-limiting surge protector performance " (patent No.: CN103969523A) is exactly that punching Luo-coil carries out Leakage Current signals collecting; amplify after again filtering process being carried out to its signal, show that whether normal the duty of voltage-limiting surge protector is.But, contain current in resistance property and capacity current two kinds of compositions in Leakage Current.Total leakage current method makes moist and the defect such as valve block serious aging though can react lightning arrester entirety to a certain extent, but the ratio shared in total leakage current due to resistive component very little (accounting for 5% during deterioration), likely when current in resistance property oneself through increasing a lot of time, the change of total leakage current is still little, and current in resistance property often valve block heating main cause, therefore the sensitivity of the method is not high, and the data of collection only can be used for the first of surge protector operation conditions and sentence; In order to the interference of capacity current can be reduced, experts and scholars are had to mention in paper " testing research for the surge protector of lightening protection engineering ": during the annual test of meteorological department at surge protector, often surge protector is dismantled, deliver to laboratory and carry out off-line testing, this detection mode, take time and effort, and working condition when truly cannot reflect that surge protector works online; Due to on-line monitoring cannot be coordinated and current component distinguishes the problem extracted; the two CT method of external utility model and the duty of thermometry to lightning arrester are monitored; but; the lightning arrester monitoring that these two kinds of methods are used for high voltage power transmission and transforming system has certain advantage; but for low-voltage distribution system, due to distribution network complex structure own, node is more; surge protector usage quantity is large, uses these external two kinds of methods cannot realize economically.
Summary of the invention
The purpose of this utility model is for above-mentioned deficiency of the prior art, provides a kind of voltage-limiting surge protector current in resistance property on-Line Monitor Device.
The utility model is by the implementation method Method of Spreading Design around a kind of voltage-limiting surge protector current in resistance property on-line monitoring; the innovative point of design is both to have adhered to the principle of on-line monitoring; highlight again the extraction and analysis for faint current in resistance property, using criterion aging as voltage-limiting surge protector, deteriorated for current in resistance property value.
The purpose of this utility model is achieved through the following technical solutions:
A kind of voltage-limiting surge protector current in resistance property on-Line Monitor Device, comprise voltage signal acquisition module, current signal collection module, temperature collect module, dsPIC chip processing module, output module and external clock module, described current signal collection module, temperature collect module and external clock module are connected with described dsPIC chip processing module by A/D translation interface, and described output module is connected with dsPIC chip processing module; Wherein:
Described voltage signal acquisition module is used for gathering the voltage of power and distribution supply cable, line linearity step-down process of going forward side by side, then carries out after analog to digital conversion through A/D translation interface, gives described dsPIC chip processing module;
Described current signal collection module is used for gathering total Leakage Current of surge protector, and line linearity of going forward side by side amplifies process, then carries out after analog to digital conversion through A/D translation interface, passes to described dsPIC chip processing module;
Described temperature collect module is connected with described dsPIC chip processing module by A/D translation interface, for gathering the temperature with pressure-sensitive in surge protector, gives dsPIC chip processing module;
Described dsPIC chip processing module for receiving the data of each module, and carries out treatment and analysis;
Described output module comprise in data disaply moudle or data-printing module or data memory module one or more, for exporting the result data that described dsPIC chip processing module obtains;
Described external clock module is for providing current real-time temporal information.
Further design of the present utility model is:
Described voltage signal acquisition module comprises the voltage signal sampling circuit, linear mutual inductor and the signal amplifier that connect successively; The model of described linear mutual inductor is SPT204A, and the model of described signal amplifier is AD620, and the voltage magnitude that signal amplifier exports is between 0-5V.
Current signal collection module comprises the micro-current collector, current transformer and the signal amplifier that connect successively; Micro-current collector adopts multiturn to seal in the current collector that declines, and comprises the annular core of permalloy material, first side winding and secondary side winding, the protective wire of a side joint surge protector, current transformer described in secondary side joint; Annular core is permalloy material, and annular core internal diameter is 12mm, and external diameter is 24mm, and first side winding is wound around 2 circles, and secondary side winding, at least coiling 2000 circle, makes the microampere order electric current collected transfer milliampere level electric current to.
This device also comprises frequency detection module, and the input end of described frequency detection module is connected to the linear mutual inductor secondary side of voltage signal acquisition module, and output terminal is connected to dsPIC chip controller.
This device also comprises coding control module, and described coding control module is connected with described dsPIC chip processing module by A/D translation interface, is made up of a rotary coding switch and collateral line circuit.
This device can also comprise user side, and dsPIC chip processing module is communicated to connect by zigbee relay wireless signals module and user side.
The method of above-mentioned voltage-limiting surge protector current in resistance property on-Line Monitor Device on-line monitoring voltage-limiting surge protector current in resistance property comprises the following steps:
(1) by each acquisition module respectively (voltage signal acquisition module, current signal collection module, temperature collect module) gather initial total leakage current I of pressure-sensitive surface temperature T1 and surge protector in the voltage magnitude voltage of power and distribution supply cable, surge protector;
(2) Linear Amplifer process is carried out to the initial total leakage current I that step 1 collects, and carry out analog to digital conversion obtain conditioning after total leakage current I1;
(3) the deteriorated limiting temperature value T0 of pressure-sensitive in the T1 of comparison step 1 and surge protector, the size of (T0 is specified by pressure-sensitive manufacturer), as T1 be more than or equal to T0 time, directly export " in surge protector pressure-sensitive deterioration "; As T1 is less than T0, then enter step 4);
(4) the total leakage current I1 after nursing one's health step 2 carries out Fast Fourier Transform (FFT) (FFT) and reduction treatment, obtains each harmonic Leakage Current I
k, from I
kwaveform in obtain the amplitude I of individual harmonic current
kmwith each harmonic phase angle β
k; And linear voltage decreasing process is carried out to the voltage that step 1 collects, and carry out analog to digital conversion and obtain nursing one's health rear voltage, after conditioning voltage waveform obtain each harmonic phase angle α
k; Wherein: k is the number of times of harmonic wave, the round values of 1-7 is got;
Harmonic current is the non-sinusoidal nature electric current introduced by equipment or system, as long as non-sinusoidal harmonic wave, just can decompose it, be decomposed into odd and even.Any periodic waveform all can be analyzed to the sine wave that a fundamental frequency sine wave adds many harmonic frequencies.Harmonic frequency is the integral multiple of fundamental frequency, and such as fundamental frequency is 50Hz, and be called base time (once) harmonic wave, second harmonic is 100Hz, and third harmonic is then 150Hz ...Total Leakage Current refers to 1,2 ... the addition of waveforms of all waveforms of 7 subharmonic.
(5) I of corresponding overtone order step 4 obtained
km, α
k, β
ksubstitute into formula (a), obtain the amplitude I of each current in resistance property
rk; Again by the amplitude I of each current in resistance property
rksubstitute into formula (b), obtain the amplitude I of total current in resistance property
r, by the I obtained
rk, I
rcarry out exporting or store in order to calling;
I
Rk＝I
kmcos(β
k-α
k) (a)
In formula: k is the number of times of harmonic wave, get the round values of 1-7, I
r0for resistive current first harmonics component (when k, m value 0 time, can obtain I
r0);
(6) the amplitude I of total current in resistance property step 5 obtained
rcontrast, if I with 5% of the maximum Leakage Current permissible value of surge protector
rbe more than or equal to its 5%, then can judge that SPD is deteriorated, if I
rbe less than its 5%, then can judge that SPD is normal.
The utility model has following outstanding beneficial effect:
The method is by gathering pressure-sensitive surface temperature and total leakage current in surge protector, Fast Fourier Transform (FFT) and computing are carried out to total leakage current, obtain total current in resistance property, voltage-limiting surge protector current in resistance property on-Line Monitor Device of the present utility model, can effective coordination on-line monitoring current component distinguish extract problem, the expense that on-line monitoring voltage-limit type SPD current in resistance property device is produced can be reduced simultaneously, local networking is facilitated to monitor, can effectively reduce because of after SPD deterioration, cannot the electrical fire that causes of Timeliness coverage or overvoltage protection situation about losing efficacy.Concrete beneficial effect is as follows:
(1) multiturn adopted in the utility model device seals in the design of the current collector that declines, and does not namely affect protective wire (PE line) work, again can non-contact measurement surge protector electric current, safe and reliable.
(2) in monitoring method of the present utility model, data, by singlechip chip process, achieve voltage, electric current are monitored simultaneously, overcome the defect of monitoring total leakage current method in prior art, data result can on-line normalization, directly display, print, make convenient reading succinct.
(3), in the utility model device, the monitoring range of current in resistance property is wide, is 0.1 μ A ~ 10mA, generally can measures 1 μ A-10mA on the market; Precision is high, reaches 0.1 μ A, and precision is 1 μ A on the market, maximumly calculates seven current in resistance property, and like product generally can only measure three Leakage Currents on the market;
(4) this device can run by real-time online, within round-the-clock 24 hours, can monitor voltage-limit type SPD duty, is convenient to promote.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model voltage-limiting surge protector (SPD) current in resistance property on-Line Monitor Device;
Fig. 2 is that multiturn seals in the current collector structural representation that declines;
Fig. 3 is voltage signal acquisition modular circuit schematic diagram;
Fig. 4 is frequency detection module circuit theory diagrams;
Fig. 5 is current signal collection module circuit theory diagrams;
Fig. 6 is the utility model voltage-limiting surge protector current in resistance property on-line monitoring method schematic flow sheet.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Embodiment one:
As shown in Figure 1, voltage-limiting surge protector of the present utility model (SPD) current in resistance property on-Line Monitor Device, comprises voltage signal acquisition module, current signal collection module, temperature collect module, dsPIC chip processing module, external clock module, exports mould, frequency detection module, coding control module and carry out the zigbee relay wireless signals module of wireless transmission with data memory module; Voltage signal acquisition module, current signal collection module and external clock module are connected with dsPIC chip processing module by A/D translation interface, and output module is connected with dsPIC chip processing module.The input end of described frequency detection module is connected to Current Transformer Secondary side, output terminal is connected to dsPIC chip controller, for the frequency monitoring of voltage signal, by analyzing the voltage signal frequency at surge protector two ends, can judge whether surge protector is in overvoltage protection starting state; Described coding control module is connected with dsPIC chip processing module by A/D translation interface, be made up of a rotary coding switch and collateral line circuit, to dspPIC control chip input signal, beginning and the end of subsequent module work can be controlled by rotary coding switch; Described temperature collect module is connected with dsPIC chip processing module by A/D translation interface, for gathering the temperature parameter of pressure-sensitive in surge protector, passes to dsPIC chip processing module.Described temperature collect module comprises 1 infrared temperature acquisition probe, and infrared emitting of popping one's head in, receiving end are aimed at piezoresistive wafer and installed.
Wherein:
Voltage signal acquisition module is used for monitoring the voltage fluctuation of power and distribution supply cable, when superpotential invades, gather superpotential amplitude, because the voltage signal collected is often larger, dsPIC chip processing unit can not be directly delivered to, so need its voltage signal to carry out linear voltage decreasing process, then carry out after analog to digital conversion through A/D translation interface, pass to dsPIC chip processing module.
Current signal collection module is used for gathering total Leakage Current of surge protector; because the current signal collected is often little especially; be generally a microampere magnitude; still smaller by the voltage signal be converted to after integrating circuit integration; so usually need linearly to boost process; voltage/current signals after process still belongs to simulating signal, so need again to carry out analog to digital conversion through A/D translation interface, then passes to the CPU processing module of dsPIC chip.
Because the leakage current of tested SPD is very little, be generally a microampere magnitude, if use core-theaded type collector, the electric current that can normally measure, then its technique for coiling must be very strict, and the number of turn is very many, usual sensor also must add activated amplifier just can make signal Long line transmission, and owing to there is amplifier, noise also will be exaggerated, useful signal may forever be capped, and this type of collector has many shortcomings being difficult to overcome.Multiturn is adopted to seal in the current collector that declines so the application designs, as shown in Figure 2, this multiturn seals in the current collector that declines and comprises the annular core of permalloy material, first side winding and secondary side winding, the protective wire of a side joint surge protector, current transformer described in secondary side joint; Annular core is permalloy material, and annular core internal diameter is 12mm, and external diameter is 24mm, first side winding n1 coiling 2 circle, and Secondary Winding n2 coiling 2000 circle makes the microampere order electric current collected transfer milliampere level electric current to.The PE line of micro-current collector side joint SPD, during in order to prevent earth fault, PE line induction reactance is excessive, and first side winding n1 is only wound around 2 circles, and collector core material is selected at the excellent permalloy of working range (0-0.05T) internal linear degree, annular core internal diameter 12mm, external diameter 24mm; Leakage Current signal is directly transferred to current transformer after sealing in the collection of formula current collector by multiturn.
The concrete model of dsPIC chip processing module is dsPIC30F6015 chip, for data analysis and process.
External clock module for providing current real-time temporal information, and supplies dsPIC chip processing module and other module follow-up use.
Temperature, time signal are after correlation acquisition unit carries out signals collecting, send into filtering circuit and carry out noise processed, the A/D translation interface being transferred to dsPIC chip again carries out current potential conversion, because the control signal of rotary coding switch inherently belongs to digital signal, and it is pure especially, so directly can be transferred to the A/D translation interface of dsPIC chip without filtering, it is more rapid that this way can make to control reaction.
Output module comprise in data disaply moudle or data-printing module or data memory module one or more, for exporting the result data that dsPIC chip processing module obtains.DsPIC chip transfers data to outer memory module by bus, data disaply moudle etc. after the voltage of input, electric current, temperature, time data are carried out overall treatment, checks call for user.Data memory module completes storage work primarily of external memory storage, while data store, data are sent to the zigbee wireless relay module near SPD by RF array antenna, data disaply moudle mainly completes display task by liquid crystal display, before data-printing, data can be checked on a liquid crystal display, data are carried out selective dump, due to the RS232 interface that printer adopts usually, so be connected in series a serial ports converting unit between bus interface with RS232 interface, printer is caused to damage in order to prevent internal overvoltage pulse, protected location can be installed additional in printer front end.
See Fig. 3, voltage signal acquisition module comprises linear mutual inductor that the voltage signal sampling circuit, the model that connect successively are SPT204A and model is the signal amplifier of AD620, voltage introduces linear mutual inductor through voltage signal sampling circuit, the voltage signal of linear mutual inductor secondary side is given signal amplifier and is carried out zero point and range-adjusting, then exports to dsPIC chip processing module.Because mains voltage signal or surge voltage signal all can not directly for single-chip microcomputers, so also need small voltage mutual inductor to carry out isolating and changing, thus in voltage signal acquisition modular circuit most critical be linear mutual inductor T2 (SPT204A).The voltage signal that voltage waveform forms through resistance R29, R30 and small-sized pressure-sensitive VR1
sample circuitintroduce linear mutual inductor T2, voltage signal one tunnel of linear mutual inductor T2 secondary side is given instrument amplifier AD620 and is carried out zero point and range-adjusting, the voltage magnitude that AD620 exports is between 0-5V, deliver to the analog input port AN0 of controller again, for A/D sampling, this part electric signal is the measurement for voltage effective value and each harmonic.Wherein in circuit, VR1 is small-sized pressure-sensitive, designs to prevent superpotential from scurrying into signal acquisition circuit; Resistance R29, R30 are in order to the voltage signal of probe acquires is converted to current signal, improve the linearity of linear mutual inductor T2, so value is all comparatively large, use the 2W carbon resister of 47k Ω.Wherein the highest receiver voltage of primary side of linear mutual inductor T2 is 400V, so the clamping voltage of also selecting of pressure-sensitive VR1 is less than the voltage dependent resistor (VDR) of 400V.Because SPT204A is 1:1 linear mutual inductor, so T2 secondary side current is also very little, so also need to convert back voltage signal and carry out amplification processing signals and amplify.Namely realize electric current by resistance R11 in Fig. 3 to change to the signal of voltage, the magnitude of voltage be converted to between+0.54V at-0.54V, then is given AD620 chip and is amplified.Another road of linear mutual inductor T2 secondary side signal is then give comparer LM393, sine voltage signal is changed into the square-wave signal that frequency is identical, the input capture pin RD8 (IC1) delivering to dsPIC chip controller again carries out frequency measurement, as shown in Figure 4.
See Fig. 5, current signal collection module comprises the micro-current collector, current transformer and the signal amplifier that connect successively, electric current introduces current transformer through current signal place in circuit, the current signal of Current Transformer Secondary side is converted to voltage signal by potentiometer, amplify through signal amplifier again, then export to dsPIC chip processing module.I frame in Fig. 5 is the multiturn shown in Fig. 2 and seals in the current collector that declines.When the existence of voltage dependent resistor (VDR) VR2 is to prevent SPD to be in conducting bleed state, dash current causes secondary side voltage instantaneous overcurrent by during current sensor I primary side, burn out subsequent conditioning circuit, so the usual value of voltage dependent resistor (VDR) VR2 only needs to be greater than 1.15U0 (U0 is the normal working voltage of the input end of current transformer T1).The small current mutual inductor of current transformer to be a model be KT0.02A/PJ-1.6V, it can survey frequency be 25-50kHz, and amplitude is the alternating current of 0-20mA, and export the ac current signal of 0-100mA, measuring accuracy is between 0.5%-1%.Current signal is sampled through Current Transformer Secondary, and the current signal that secondary side exports is converted to voltage signal by potentiometer W1, then amplifies through AD620, and the voltage signal exporting 0-5V gives the AN1 pin of controller, then carries out A/D converted measurement.Before ANO and AN1 pin input end, all add voltage stabilizing diode Z1, Z2 of 5.1V, prevent the output voltage of AD620 too high and damage the A/D change-over circuit of single-chip microcomputer.
Embodiment two:
See Fig. 6, use the utility model voltage-limiting surge protector current in resistance property to be carried out to the method for on-line monitoring, comprise the following steps:
(1) by each acquisition module respectively (voltage signal acquisition module, current signal collection module, temperature collect module) gather initial total leakage current I of pressure-sensitive surface temperature T1 and surge protector in the voltage magnitude voltage of power and distribution supply cable, surge protector;
(2) Linear Amplifer process is carried out to the initial total leakage current I that step 1 collects, and carry out analog to digital conversion obtain conditioning after total leakage current I1;
(3) the deteriorated limiting temperature value T0 of pressure-sensitive in the T1 of comparison step 1 and surge protector, the size of (T0 is specified by pressure-sensitive manufacturer), as T1 be more than or equal to T0 time, directly export " in surge protector pressure-sensitive deterioration "; As T1 is less than T0, then enter step 4);
(4) the total leakage current I1 after nursing one's health step 2 carries out Fast Fourier Transform (FFT) (FFT) and reduction treatment, obtains each harmonic Leakage Current I
k, from I
kwaveform in obtain the amplitude I of individual harmonic current
kmwith each harmonic phase angle β
k; And linear voltage decreasing process is carried out to the voltage that step 1 collects, and carry out analog to digital conversion and obtain nursing one's health rear voltage, after conditioning voltage waveform obtain each harmonic phase angle α
k; Wherein: k is the number of times of harmonic wave, the round values of 1-7 is got; In this example, k gets 7;
Harmonic current is the non-sinusoidal nature electric current introduced by equipment or system, as long as non-sinusoidal harmonic wave, just can decompose it, be decomposed into odd and even.Any periodic waveform all can be analyzed to the sine wave that a fundamental frequency sine wave adds many harmonic frequencies.Harmonic frequency is the integral multiple of fundamental frequency, and such as fundamental frequency is 50Hz, and be called base time (once) harmonic wave, second harmonic is 100Hz, and third harmonic is then 150Hz ...Total Leakage Current refers to 1,2 ... the addition of waveforms of all waveforms of 7 subharmonic.
(5) I of corresponding overtone order step 4 obtained
km, α
k, β
ksubstitute into formula (a), obtain the amplitude I of each current in resistance property
rk; Again by the amplitude I of each current in resistance property
rksubstitute into formula (b), obtain the amplitude I of total current in resistance property
r, by the I obtained
rk, I
rcarry out exporting or store in order to calling;
I
Rk＝I
kmcos(β
k-α
k) (a)
In formula: k is the number of times of harmonic wave, get the round values of 1-7, in this example, k gets 7; I
r0for resistive current first harmonics component (when k, m value 0 time, can obtain I
r0); The process chip that the utility model adopts is dsPIC30F6015, maximumly analyzes seven primary current harmonic components.
(6) 5% of the maximum Leakage Current permissible value that total resistive leakage current IR step 5 obtained and surge protector nameplate indicate contrasts, if be more than or equal to its 5%, then can judge that SPD is deteriorated, if be less than its 5%, then can judge that SPD is normal.
Be more than preferred embodiment of the present utility model, all changes done according to technical solutions of the utility model, when the function produced does not exceed the scope of technical solutions of the utility model, all belong to protection domain of the present utility model.
Claims (7)
1. a voltage-limiting surge protector current in resistance property on-Line Monitor Device, it is characterized in that, comprise voltage signal acquisition module, current signal collection module, temperature collect module, dsPIC chip processing module, output module and external clock module, described current signal collection module, temperature collect module and external clock module are connected with described dsPIC chip processing module by A/D translation interface, and described output module is connected with dsPIC chip processing module; Wherein:
Described voltage signal acquisition module is used for gathering the voltage of power and distribution supply cable, line linearity step-down process of going forward side by side, then carries out after analog to digital conversion through A/D translation interface, gives described dsPIC chip processing module;
Described current signal collection module is used for gathering total Leakage Current of surge protector, and line linearity of going forward side by side amplifies process, then carries out after analog to digital conversion through A/D translation interface, passes to described dsPIC chip processing module;
Described temperature collect module is connected with described dsPIC chip processing module by A/D translation interface, for gathering the temperature with pressure-sensitive in surge protector, gives dsPIC chip processing module;
Described dsPIC chip processing module for receiving the data of each module, and carries out treatment and analysis;
Described output module comprise in data disaply moudle or data-printing module or data memory module one or more, for exporting the result data that described dsPIC chip processing module obtains;
Described external clock module is for providing current real-time temporal information.
2. on-Line Monitor Device according to claim 1, is characterized in that, described voltage signal acquisition module comprises the voltage signal sampling circuit, linear mutual inductor and the signal amplifier that connect successively.
3. on-Line Monitor Device according to claim 2, is characterized in that, the model of described linear mutual inductor is SPT204A, and the model of described signal amplifier is AD620, and the voltage magnitude that signal amplifier exports is between 0-5V.
4. on-Line Monitor Device according to claim 2, is characterized in that, also comprises frequency detection module, and the input end of described frequency detection module is connected to the linear mutual inductor secondary side of voltage signal acquisition module, and output terminal is connected to dsPIC chip controller.
5. on-Line Monitor Device according to claim 1, is characterized in that, described current signal collection module comprises the micro-current collector, current transformer and the signal amplifier that connect successively.
6. on-Line Monitor Device according to claim 5; it is characterized in that; described micro-current collector adopts multiturn to seal in the current collector that declines; comprise the annular core of permalloy material, first side winding and secondary side winding; the protective wire of a side joint surge protector; current transformer described in secondary side joint, and primary side is only wound around 2 circles, secondary side is coiling 2000 circle at least.
7. on-Line Monitor Device according to claim 1, is characterized in that, also comprises coding control module, and described coding control module is connected with described dsPIC chip processing module by A/D translation interface, is made up of a rotary coding switch and collateral line circuit; This device can also comprise user side, and dsPIC chip processing module is communicated to connect by zigbee relay wireless signals module and user side.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808050A (en) * | 2015-05-26 | 2015-07-29 | 南京信息工程大学 | Method and device for monitoring resistive current of voltage-limiting type surge protection device on line |
| CN105807121A (en) * | 2016-03-17 | 2016-07-27 | 深圳市楚邦智能技术有限公司 | Lightning ground potential counter voltage online monitoring device |
| CN106707010A (en) * | 2016-12-30 | 2017-05-24 | 国网甘肃省电力公司电力科学研究院 | High potential side resistive current measuring system |
-
2015
- 2015-05-26 CN CN201520348261.2U patent/CN204666717U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808050A (en) * | 2015-05-26 | 2015-07-29 | 南京信息工程大学 | Method and device for monitoring resistive current of voltage-limiting type surge protection device on line |
| CN105807121A (en) * | 2016-03-17 | 2016-07-27 | 深圳市楚邦智能技术有限公司 | Lightning ground potential counter voltage online monitoring device |
| CN106707010A (en) * | 2016-12-30 | 2017-05-24 | 国网甘肃省电力公司电力科学研究院 | High potential side resistive current measuring system |
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