CN103760412A - Single-chip microcomputer micro-power-consumption test system and method for leakage current of zinc oxide arrester - Google Patents
Single-chip microcomputer micro-power-consumption test system and method for leakage current of zinc oxide arrester Download PDFInfo
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- CN103760412A CN103760412A CN201410022830.4A CN201410022830A CN103760412A CN 103760412 A CN103760412 A CN 103760412A CN 201410022830 A CN201410022830 A CN 201410022830A CN 103760412 A CN103760412 A CN 103760412A
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Abstract
The invention discloses a single-chip microcomputer micro-power-consumption test system for the leakage current of a zinc oxide arrester. The system comprises a probe part. The probe part comprises a single-chip microcomputer. The single-chip microcomputer is connected with a signal conditioning circuit, a reset and voltage monitoring circuit, a power switching circuit and an electro-optical conversion circuit. A plurality of current measuring probes are connected to the input end of the signal conditioning circuit. The electro-optical conversion circuit is connected with a plurality of optical fiber receiving circuits through optical fibers. All the optical fiber receiving circuits are connected with an upper computer. The upper computer is connected with a display screen. The invention further discloses a single-chip microcomputer micro-power-consumption test method for the leakage current of the zinc oxide arrester. By means of the system and method, the problem of interference between high voltage and low voltage and isolation is solved, the requirement for micro power consumption is met, and the zinc oxide arrester will not be damaged at all in the measuring process.
Description
Technical field
The invention belongs to high-tension apparatus technical field of measurement and test, relate to the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a kind of single-chip microcomputer test macro, the invention still further relates to the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a kind of single-chip microcomputer method of testing.
Background technology
At present lightning arrester is widely used in power distribution network, and it is more and more that Zinc-Oxide Arrester is again that a kind of Novel lightning arrester is used in electric system, therefore to the preventive trial of lightning arrester also more and more attention.Pilot project has very large difficulty with ac high-voltage test, and therefore the use of Zinc-Oxide Arrester test macro is necessary.Zinc-Oxide Arrester test macro is to be specifically designed to the inherent vice that detects electric system gapless formula Zinc-Oxide Arrester valve block 13 manufacturing process and material, measures the leakage current of Zinc-Oxide Arrester.But there is in actual use the excessive problem of power consumption in traditional lightning arrester test macro, make test macro of short duration service time in once testing, can bring inconvenience to experiment.
Under the overall background of environmental protection, low-carbon (LC), micro-power consumption has also become the generally pursuit of contemporary electronic systems.Simultaneously in order to extend the working time of lightning arrester test macro, further how research Zinc-Oxide Arrester test macro accomplishes micro-power consumption, be badly in need of a kind of micro-power consumption Zinc-Oxide Arrester test macro of development and method, detection before using for electric system Zinc-Oxide Arrester, to find out the quality of Zinc-Oxide Arrester valve block 13 manufacturing process and material, impel its more stable, running more efficiently.
Summary of the invention
The object of this invention is to provide the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a kind of single-chip microcomputer test macro, solved the power consumption existing in prior art excessive, detect not problem accurately.
Another object of the present invention is to provide the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a kind of single-chip microcomputer method of testing.
The technical solution adopted in the present invention is, the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a kind of single-chip microcomputer test macro, comprise probe segment, described probe segment comprises a single-chip microcomputer, single-chip microcomputer is connected with signal conditioning circuit, reset and voltage monitoring circuit, power-switching circuit and electro-optical conversion circuit respectively, and signal conditioning circuit input end is connected with multiple current measurement probes; Electro-optical conversion circuit is connected with the optical receiving circuit of multichannel by optical fiber, and all optical receiving circuits are connected with host computer, and host computer is connected with display screen.
Another technical scheme of the present invention is, the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a kind of single-chip microcomputer method of testing, according to following steps, implement: each current measurement probe is connected in turn between adjacent Zinc-Oxide Arrester valve block, to detect voltage and be directly added in the two ends of institute's jointing Zinc-Oxide Arrester valve block, it is converted into pulse signal by probe segment, by optical fiber, communicate by letter with epigynous computer section and just can measure the leakage current of valve block, the quality condition that judges Zinc-Oxide Arrester valve block with this shows in display screen.
The invention has the beneficial effects as follows, not only can measure accurately leakage current, and adopt lithium battery to power separately, by optical fiber, carry out the communication between high-low pressure, effectively solved high-low pressure and disturbed and isolating problem; Adopt micro-power consumption designing technique of single-chip microcomputer to make Zinc-Oxide Arrester test macro meet the requirement of micro-power consumption simultaneously; This lightning arrester test macro has very high resistance characteristic with restriction electric current wherein, with the effect of high-voltage rectifier, alternating current is changed into direct current, uses lightning arrester test macro not test and can cause any damage to lightning arrester itself.
Accompanying drawing explanation
Fig. 1 is the structural representation of test macro of the present invention;
Fig. 2 is the mounting structure schematic diagram of test macro of the present invention while testing;
Fig. 3 is the power-switching circuit schematic diagram in test macro of the present invention;
Fig. 4 is voltage monitoring and the reset circuit schematic diagram in test macro of the present invention;
Fig. 5 is the signal conditioning circuit schematic diagram in test macro of the present invention;
Fig. 6 is single-chip microcomputer 1 and the electro-optical conversion circuit diagram in test macro of the present invention;
Fig. 7 is the workflow diagram of the single-chip microcomputer 1 in test macro of the present invention.
In figure, 1. single-chip microcomputer, 2. signal conditioning circuit, 3. current measurement probe, 4. resets and voltage monitoring circuit, 5. power-switching circuit, 6. electro-optical conversion circuit, 7. optical receiving circuit, 8. host computer, 9. display screen, 10. probe segment, 11. epigynous computer section, 12.40 tunnel optical-fibre channels, 13. arrester valve piece mades.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of single-chip microcomputer of the present invention test macro, comprise probe segment 10 (potential acquisition end) and epigynous computer section 11, between two parts, by optical fiber, connect, according to self-defining communication protocol, communicate.
Probe segment 10 comprises a single-chip microcomputer 1, single-chip microcomputer 1 is connected with signal conditioning circuit 2, reset and voltage monitoring circuit 4, power-switching circuit 5 and electro-optical conversion circuit 6 respectively, signal conditioning circuit 2 input ends are connected with multiple current measurement probes 3, for receiving the sensed current signal of all current measurement probes 3; Electro-optical conversion circuit 6 is connected with epigynous computer section 11 by optical fiber, epigynous computer section 11 comprises the optical receiving circuit 7 of multichannel, the optical receiving circuit 7 of multichannel is connected with electro-optical conversion circuit 6 by optical fiber, all optical receiving circuits 7 are connected with host computer 8, host computer 8 and display screen 9(or other output display units) be connected.
Power-switching circuit 5 adopts lithium battery to power separately.Single-chip microcomputer 1 has adopted low-power scm MSP430F149 model, and under low power consumpting state, by lithium battery power supply, voltage and frequency are all very low, and working current is less than 1.3 μ A, has reached the requirement of micro-power consumption.Meanwhile, MSP430F149 type single-chip microcomputer also can make system designer keep the unique lower powered while to be synchronously connected to simulating signal, sensor and digital assembly.Meanwhile, the communication between probe segment and epigynous computer section adopts Optical Fiber Transmission, has realized the function that high and low pressure disturbs and isolates.
As shown in Figure 2, the enforcement of the inventive method, depend on above-mentioned test macro, implement in such a way: each current measurement probe 3 is connected in turn between adjacent Zinc-Oxide Arrester valve block 13, detection voltage is directly added in to the two ends of institute's jointing Zinc-Oxide Arrester valve block 13, it is converted into pulse signal by probe segment, by optical fiber, communicate by letter with epigynous computer section and just can measure the leakage current of valve block, the quality condition that judges Zinc-Oxide Arrester valve block 13 shows in display screen.By regular or irregular detection Zinc-Oxide Arrester valve block 13 aging conditions, overhaul in time or replace aging Zinc-Oxide Arrester valve block 13, avoid the more major break down bringing because Zinc-Oxide Arrester valve block 13 is aging.Epigynous computer section 11 can disposablely be carried out the measurement of 40 location parameters by 40 tunnel optical-fibre channels 12.
Fig. 3 is the schematic diagram of the power-switching circuit 5 in this test macro, and power-switching circuit 5 adopts lithium battery front end to power separately, and capacity is 150mAh/3.6V; Lithium battery is parallel with IN port and the GND port of the rear access power conversion chip of capacitor C 1 (model is TPS76433), the IN port of power conversion chip and EN port short circuit, the BYPASS port of power conversion chip need not, unsettled, lithium battery by power conversion chip by 3.6V voltage transitions, be+3.3V exports from OUT port.The supply voltage needing due to MSP430F149 type single-chip microcomputer used is 3.3V, therefore use TPS76433 power supply voltage stabilizing chip in this power module, lithium battery voltage is converted into the required voltage of suitable single-chip microcomputer.
Fig. 4 is reset in this test macro and the schematic diagram of voltage monitoring circuit 4, reset and voltage monitoring circuit 4 comprise processor monitors circuit chip (model is TPS3823), by power conversion chip TPS76433, convert+the vdd terminal mouth of 3.3V voltage one tunnel access processor monitors circuit chip, after the resistance in series R4 of another road of+3.3V voltage, access the WDI port of processor monitors circuit chip, processor monitors circuit chip
port is connected to realize reset function with the RST reseting port of one-chip computer module, the GND port ground connection of processor monitors circuit chip, this circuit, for probe segment provides circuit initialization and Timing power supply voltage monitoring, guarantees that single-chip microcomputer obtains stable supply voltage.
Fig. 5 is the schematic diagram of the signal conditioning circuit 2 of probe segment in this test macro, its structure is, comprise the resistance R in parallel with current signal 5, resistance R 5 one termination GND, resistance R 5 is parallel with diode D2, diode D2 is parallel with resistance R 2 and the capacitor C 2 of serial connection, and the contact between resistance R 2 and capacitor C 2 is connected with+3.3V voltage by diode D1, and this contact is connected with the P6.5 port in single-chip microcomputer simultaneously.
Fig. 6 is the structure of single-chip microcomputer 1 and the electro-optical conversion circuit 6 of probe segment in this test macro, single-chip microcomputer 1 model is selected MSP430F149, because this single-chip microcomputer has the feature such as development environment of the stable and convenience and high-efficiency of peripheral module on super low-power consumption, powerful processing power, high performance analog technology and abundant sheet, system works, make whole Zinc-Oxide Arrester Leakage Current test macro meet the requirement of micro-power consumption.The DV of single-chip microcomputer
cCconnect+3.3V of port one tunnel, simultaneously DV
cCanother road of port meets GND through capacitor C in parallel 5 and capacitor C 6, simultaneously the AV of single-chip microcomputer
cCport connects 3.3V voltage and provides supply voltage, the DV of single-chip microcomputer for single-chip microcomputer
sSand AV
sSmeet GND, the crystal oscillator input port XT2IN of single-chip microcomputer and crystal oscillator output port XT2OUT are connected with 8M crystal oscillator two ends simultaneously simultaneously, and 8M crystal oscillator two ends meet GND by capacitor C 3 and capacitor C 4 respectively and provide clock signal for single-chip microcomputer; The P5.0 port of single-chip microcomputer connects the WDI port of reset and voltage monitoring circuit 4, realizes the stability monitoring of voltage; The P5.2 port of single-chip microcomputer is connected with electro-optical conversion circuit 6.
The structure of electro-optical conversion circuit 6 is, comprise the resistance R 3 being connected with the P5.2 port of single-chip microcomputer, resistance R 3 is connected with the triode signal input utmost point, triode minus earth, the signal emitters of triode is connected with fiber optic emitter, and fiber optic emitter is connected with+3.3V voltage by resistance R 1 in addition.
Through single-chip microcomputer MSP430F149 electric signal after treatment, from P5.2 port, offer electro-optical conversion circuit 6, by triode and fiber optic emitter, convert electrical signals to light signal, by Optical Fiber Transmission, to epigynous computer section, show.
Be the workflow diagram of single-chip microcomputer 1 in test macro probe segment of the present invention as shown in Figure 7, first single-chip microcomputer MSP430F149 carried out to system initialization, in initialization of variable, definitional part P mouth is peripheral module, and regulation P5.2 mouth is delivery outlet.Then ADC12 and timer are carried out to initialization, in program, making the P6.5 port being connected with signal conditioning circuit 2 is peripheral module, removes the register in ADC12.Then in program, open interruption, but before change arranges, first stop A/D conversion, and then start ADC12 and sample, the form of sampling is single channel unitary sampling, allows to interrupt.While starting interrupt routine, utilize register to do delay process, guaranteeing has time enough in the process of sampling and maintenance, to determine the precision of conversion.In real process, to 100 some positions of a sine wave period sampling, in initialization, the some figure place 100 of required setting is assigned to self-defined register for this reason.Then by sampling, obtain the maximal value of first cycle, again with the maximal value in identical method 63 cycles of sampling, finally obtain 64 peaked mean values, carry out the judgement comparison of threshold value and mean value, time delay a period of time Output rusults, from the data of P5.2 port output, through fiber optic emitter, emit, epigynous computer section receives and shows.
Epigynous computer section adopts C Programming with Pascal Language, prestores master routine, comprises calculated rate subroutine, the subroutine of tabling look-up and display subroutine, obtains corresponding voltage, frequency transformation relation, after tabling look-up through calculating the corresponding electric current of voltage.
The inventive method is in program, in batches, at times same data point is detected, by the relativity between multi-group data, determine master data scope, pursue no longer simply data temporary transient accurately, but observed data meets and do not meet interval range, reach the requirement of measuring accuracy.
The inventive method is in practical operation, test macro is connected successively with arrester valve piece made 13, be connected between the phase line-to-ground of operation, lightning arrester test macro connects UNICOM's line and lightning arrester by moving casing, the same with built on stilts lightning arrester, measure and show leakage current, for the convenient lightning arrester Potential distribution of more accurately measuring, adopting the peak point current probe optical fiber test method based on single-chip microcomputer MSP430F149.
The micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of single-chip microcomputer of the present invention test macro, for photoelectricity transmission and the measurement of measuring Leakage Current of Zinc-oxide Lightning Arresters, passive probe part is converted to light signal by the current signal that flows through Zinc-Oxide Arrester, through optical fiber, send into photoelectric switching circuit, be reduced to electric signal, electric signal is sent into peak value and is detected loop and digital watch after amplifying, reach the object of measuring Zinc-Oxide Arrester current peak, according to the current value of measuring and valve block characteristic, try to achieve the distribution of valve block both end voltage and current potential, to determine that whether Zinc-Oxide Arrester is normal.
Claims (4)
1. the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a single-chip microcomputer test macro, its feature is: comprise probe segment, described probe segment comprises a single-chip microcomputer (1), single-chip microcomputer (1) is connected with signal conditioning circuit (2), reset and voltage monitoring circuit (4), power-switching circuit (5) and electro-optical conversion circuit (6) respectively, and signal conditioning circuit (2) input end is connected with multiple current measurement probes (3);
Described electro-optical conversion circuit (6) is connected with the optical receiving circuit (7) of multichannel by optical fiber, and all optical receiving circuits (7) are connected with host computer (8), and host computer (8) is connected with display screen (9).
2. the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of single-chip microcomputer according to claim 1 test macro, its feature is: described power-switching circuit (5) adopts lithium battery to power separately.
3. the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of single-chip microcomputer according to claim 1 test macro, its feature is: described reset and voltage monitoring circuit (4) adopt TPS3823 processor monitors circuit chip.
4. the micro-power consumption Leakage Current of Zinc-oxide Lightning Arresters of a single-chip microcomputer method of testing, utilize claim 1, test macro described in 2 or 3, its feature is, according to following steps, implement: each current measurement probe (3) is connected in turn between adjacent Zinc-Oxide Arrester valve block (13), to detect voltage and be directly added in the two ends of institute's jointing Zinc-Oxide Arrester valve block (13), it is converted into pulse signal by probe segment, by optical fiber, communicate by letter with epigynous computer section and just can measure the leakage current of valve block, with this, judge the quality condition of Zinc-Oxide Arrester valve block (13), in display screen, show.
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| CN201410022830.4A CN103760412A (en) | 2014-01-17 | 2014-01-17 | Single-chip microcomputer micro-power-consumption test system and method for leakage current of zinc oxide arrester |
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| CN201410022830.4A CN103760412A (en) | 2014-01-17 | 2014-01-17 | Single-chip microcomputer micro-power-consumption test system and method for leakage current of zinc oxide arrester |
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Cited By (2)
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| CN107525998A (en) * | 2017-09-08 | 2017-12-29 | 广东电网有限责任公司东莞供电局 | A kind of system and method for detecting Leakage Current of Zinc-oxide Lightning Arresters |
| CN107727993A (en) * | 2017-11-14 | 2018-02-23 | 国网辽宁省电力有限公司电力科学研究院 | The detection means and detection method of DC zinc oxide lighting arrester valve block damp degree |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107525998A (en) * | 2017-09-08 | 2017-12-29 | 广东电网有限责任公司东莞供电局 | A kind of system and method for detecting Leakage Current of Zinc-oxide Lightning Arresters |
| CN107727993A (en) * | 2017-11-14 | 2018-02-23 | 国网辽宁省电力有限公司电力科学研究院 | The detection means and detection method of DC zinc oxide lighting arrester valve block damp degree |
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Application publication date: 20140430 |