CN203535127U - Zinc oxide lightning arrester on-line monitor - Google Patents

Zinc oxide lightning arrester on-line monitor Download PDF

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Publication number
CN203535127U
CN203535127U CN201320413297.5U CN201320413297U CN203535127U CN 203535127 U CN203535127 U CN 203535127U CN 201320413297 U CN201320413297 U CN 201320413297U CN 203535127 U CN203535127 U CN 203535127U
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CN
China
Prior art keywords
output terminal
lightning arrester
zinc
arrester
chip microprocessor
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320413297.5U
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Chinese (zh)
Inventor
王艳辉
生西奎
李明霞
满永亮
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BAODING SUPERMAN ELECTRONICS Co Ltd
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BAODING SUPERMAN ELECTRONICS Co Ltd
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Priority to CN201320413297.5U priority Critical patent/CN203535127U/en
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Publication of CN203535127U publication Critical patent/CN203535127U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a zinc oxide lightning arrestor on-line monitor, which comprises at least one voltage isolation sampler, and at least one lightning arrester intelligent monitor. The output end of the voltage isolation sampler and the leakage current detection output end of the lightning arrester intelligent monitor are connected with the I/O port of a single-chip microprocessor (MCU) through a phase difference detection circuit or respectively through an intelligent analog quantity input module. The output signal end of the MCU is connected with an alarm device and/or a display screen through the I/O port. The zinc oxide lightning arrester on-line monitor is timely and accurate in detection, safe, reliable and high in degree of automation.

Description

A kind of Zinc-Oxide Arrester on-line monitoring instrument
Technical field
The utility model relates to a kind of Zinc-Oxide Arrester on-line monitoring instrument.
Background technology
Zinc-Oxide Arrester is mainly used in limiting the lightning surge being transmitted by circuit or the internal overvoltage being caused by operation, is one of important protection equipment guaranteeing safe operation of power system.But because zinc paste is lightning-arrest, bear for a long time power-frequency voltage, surge voltage, add the impact of the factors such as various external environment conditions and be tending towards ageing failure, if the Zinc-Oxide Arrester of installing lost efficacy, what electric power system was struck by lightning in case of thunderstorm weather has at any time may, can not bring into play well safety guarantee effect, therefore, whether be important measures ensureing electric power system safety to monitoring zinc oxide lightning protector if losing efficacy.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of Zinc-Oxide Arrester on-line monitoring instrument, it have detection promptly and accurately, safe and reliable, automaticity high.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: comprise at least one voltage isolation sampler and at least one lightning arrester intellectual monitoring device, the leakage current test output terminal of voltage isolation sampler output terminal and lightning arrester intellectual monitoring device is by phase difference detecting circuit or respectively by intelligent analog quantity load module, be connected with the I/O port of single-chip microprocessor MCU, and the output signal of single-chip microprocessor MCU is through I/O port connection warning device and/or display screen.
The utility model further improves and is: the thunderbolt trigger pulse output terminal of lightning arrester intellectual monitoring device is connected with the interrupt request input end INTR of single-chip microprocessor MCU by intelligent analog quantity load module; Voltage isolation sampler and lightning arrester intellectual monitoring device are many, and its output terminal is all connected with intelligent analog quantity load module, and the output terminal of above-mentioned intelligent analog quantity load module all connects wireless communication module; Single-chip microprocessor MCU is one, and its I/O port connects for the wireless communication module of isolating sampler with voltage and lightning arrester intellectual monitoring device carries out wireless telecommunications; The leakage current test output terminal of voltage isolation sampler output terminal and lightning arrester intellectual monitoring device is connected with the I/O port of single-chip microprocessor MCU by phase difference detecting circuit, phase difference detecting circuit is two zero-crossing comparators that are mainly comprised of operational amplifier, and one of them zero-crossing comparator input end is connected with voltage isolation sampler output terminal; Another zero-crossing comparator input end is connected with the leakage current test output terminal of lightning arrester intellectual monitoring device; Two zero-crossing comparator output terminals are connected with the I/O port of single-chip microprocessor MCU respectively; Zinc-Oxide Arrester on-line monitoring instrument adopts solar cell for supplying power; It also comprises host computer, and host computer is the status monitoring IED of transformer station.
Adopt the beneficial effect that technique scheme produces to be: the leakage current test output terminal of voltage isolation sampler output terminal and lightning arrester intellectual monitoring device is by phase difference detecting circuit or respectively by intelligent analog quantity load module, be connected with the I/O port of single-chip microprocessor MCU, the output signal of single-chip microprocessor MCU is through I/O port connection warning device and/or display screen.By the phase differential of detection line alternating voltage and lightning arrester Leakage Current, and with single-chip microprocessor MCU in phase differential setting value compare, logic judges whether Zinc-Oxide Arrester lost efficacy, and reports to the police and show through single-chip processor i/o interface; To submit to staff to process, guarantee that lightning arrester works safely and reliably; The thunderbolt trigger pulse output terminal of lightning arrester intellectual monitoring device is connected with the interrupt request input end INTR of single-chip microprocessor MCU by intelligent analog quantity load module.Can lightning strike signals be responded and be counted fast; Voltage isolation sampler and lightning arrester intellectual monitoring device are many, and its output terminal is all connected with intelligent analog quantity load module, and the output terminal of above-mentioned intelligent analog quantity load module all connects wireless communication module; Single-chip microprocessor MCU is one, and its I/O port connects for the wireless communication module of isolating sampler with voltage and lightning arrester intellectual monitoring device carries out wireless telecommunications.By wireless network communication technique, realize high concentration operation, show and report to the police; Host computer is the status monitoring IED of transformer station.Utilize the existing status monitoring IED of transformer station platform to manage, resource rational allocation, plant factor is high, is convenient to manage, increased the safe reliability of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the utility model embodiment 2.
Measuring principle:
Judge whether Zinc-Oxide Arrester occurs aging or make moist, conventionally to observe the situation of change of the dirty zinc peroxide arrester resistance current of normal working voltage, whether observe resistive leakage current increases as basis for estimation, and resistive leakage current often only accounts for 10%~20% of full Leakage Current, therefore, the situation of change of only determining zinc oxide lightning arrester block property Leakage Current to observe the situation of change of full Leakage Current is difficult, only has resistive leakage current to separate from total Leakage Current and could detect accurately.After general Zinc-Oxide Arrester installation in position, distributed capacitance between itself and ground is determined (the capacity current size that is leading voltage 90 degree is determined) substantially, circuit can be equivalent to electric capacity circuit in parallel with a resistor through Zinc-Oxide Arrester and the loop that ground forms, therefore, by detecting the phase differential of the leading line voltage distribution of total Leakage Current of Zinc-Oxide Arrester, can learn the situation of change of resistive leakage current, thereby judge Zinc-Oxide Arrester, whether lose efficacy.
Embodiment
Embodiment 1:
Embodiment is as shown in Figure 1 known, comprise many voltage isolation sampler and Duo Tai lightning arrester intellectual monitoring device, every voltage isolation sampler output terminal is connected with intelligent analog quantity load module, and the output terminal of its intelligent analog quantity load module connects wireless communication module; The leakage current test output terminal of every lightning arrester intellectual monitoring device is connected with intelligent analog quantity load module respectively with thunderbolt trigger pulse output terminal, and two intelligent analog quantity load module output terminal is connected with wireless communication module altogether; Single-chip microprocessor MCU is one, and its I/O port connects for the wireless communication module of isolating sampler with voltage and lightning arrester intellectual monitoring device carries out wireless telecommunications; Single-chip microprocessor MCU is one, and its I/O port also connects respectively display screen and the status monitoring IED of transformer station.Zinc-Oxide Arrester on-line monitoring instrument adopts solar cell for supplying power.
Principle of work:
Lightning arrester intellectual monitoring device is sampled to leakage current of an arrester with the speed of 10kHz, voltage isolation sampler is sampled simultaneously, sampling high speed analog signal out carries out A/D conversion through intelligent analog quantity load module, digital signal after its conversion is modulated wireless output through wireless communication module, after single-chip microprocessor MCU wireless receiving, the phase difference detection program of installing in single-chip microprocessor MCU is carried out reception & disposal, obtains leakage current of an arrester and current in resistance property, and result shows; Deliver to the status monitoring IED of transformer station simultaneously, record and the centralized management such as warning.Counting thunder, by look-at-me of thunderbolt trigger circuit triggers, upload the data to single-chip microprocessor MCU by wireless communication module, and MCU by number of lightning strokes accumulation, delivers to the status monitoring IED of transformer station in interruption simultaneously.Many voltage isolation sampler and Duo Tai lightning arrester intellectual monitoring device form zinc paste on-line monitoring system by wireless network, adopt solar powered mode, do not need external power source.
Phase difference detection program as a kind of mature technology detect accurately, function admirable, reliability be high.
Embodiment 2:
Embodiment is as shown in Figure 2 known, comprise a voltage isolation sampler and a lightning arrester intellectual monitoring device, the leakage current test output terminal of voltage isolation sampler output terminal and lightning arrester intellectual monitoring device is connected with the I/O port of single-chip microprocessor MCU by phase difference detecting circuit, phase difference detecting circuit is two zero-crossing comparators that are mainly comprised of operational amplifier, and one of them zero-crossing comparator input end is connected with voltage isolation sampler output terminal; Another zero-crossing comparator input end is connected with the leakage current test output terminal of lightning arrester intellectual monitoring device; Two zero-crossing comparator output terminals are connected with the I/O port of single-chip microprocessor MCU respectively; The thunderbolt trigger pulse output terminal of lightning arrester intellectual monitoring device is connected with the interrupt request input end INTR of single-chip microprocessor MCU by intelligent analog quantity load module.Single-chip microprocessor MCU I/O port also connects respectively display screen and the status monitoring IED of transformer station; Its power supply mode adopts solar cell for supplying power.
Principle of work:
The leakage current frequency signal that the voltage-frequency signal that voltage isolation sampler detects and lightning arrester intellectual monitoring device detect carried out zero balancing through two zero-crossing comparators that are comprised of operational amplifier, then through single-chip microprocessor MCU, calculate two mistimings between zero-crossing comparator output level rising edge, can learn the phase differential of the leading line voltage distribution of total Leakage Current, zero-crossing comparator has reliable operation, the advantage that measuring accuracy is high, the thunderbolt start pulse signal that lightning arrester intellectual monitoring device detects transfers to single-chip microprocessor MCU with interrupt mode, then through display screen, show or transfer to the status monitoring IED of transformer station.

Claims (6)

1. a Zinc-Oxide Arrester on-line monitoring instrument, it is characterized in that: comprise at least one voltage isolation sampler and at least one lightning arrester intellectual monitoring device, the leakage current test output terminal of described voltage isolation sampler output terminal and lightning arrester intellectual monitoring device is by phase difference detecting circuit or respectively by intelligent analog quantity load module, be connected with the I/O port of single-chip microprocessor MCU, and the output signal of described single-chip microprocessor MCU is through I/O port connection warning device and/or display screen.
2. a kind of Zinc-Oxide Arrester on-line monitoring instrument according to claim 1, is characterized in that the thunderbolt trigger pulse output terminal of described lightning arrester intellectual monitoring device is connected with the interrupt request input end INTR of single-chip microprocessor MCU by intelligent analog quantity load module.
3. a kind of Zinc-Oxide Arrester on-line monitoring instrument according to claim 1 and 2, it is characterized in that described voltage isolation sampler and lightning arrester intellectual monitoring device are many, its output terminal is all connected with intelligent analog quantity load module, and the output terminal of above-mentioned intelligent analog quantity load module all connects wireless communication module; Described single-chip microprocessor MCU is one, and its I/O port connects for the wireless communication module of isolating sampler with voltage and lightning arrester intellectual monitoring device carries out wireless telecommunications.
4. a kind of Zinc-Oxide Arrester on-line monitoring instrument according to claim 1 and 2, the leakage current test output terminal that it is characterized in that described voltage isolation sampler output terminal and lightning arrester intellectual monitoring device is connected with the I/O port of single-chip microprocessor MCU by phase difference detecting circuit, described phase difference detecting circuit is two zero-crossing comparators that are mainly comprised of operational amplifier, and one of them zero-crossing comparator input end is connected with voltage isolation sampler output terminal; Another zero-crossing comparator input end is connected with the leakage current test output terminal of lightning arrester intellectual monitoring device; Described two zero-crossing comparator output terminals are connected with the I/O port of single-chip microprocessor MCU respectively.
5. a kind of Zinc-Oxide Arrester on-line monitoring instrument according to claim 4, is characterized in that described Zinc-Oxide Arrester on-line monitoring instrument adopts solar cell for supplying power.
6. a kind of Zinc-Oxide Arrester on-line monitoring instrument according to claim 4, is characterized in that it also comprises host computer, and described host computer is the status monitoring IED of transformer station.
CN201320413297.5U 2013-07-11 2013-07-11 Zinc oxide lightning arrester on-line monitor Expired - Fee Related CN203535127U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320413297.5U CN203535127U (en) 2013-07-11 2013-07-11 Zinc oxide lightning arrester on-line monitor

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Application Number Priority Date Filing Date Title
CN201320413297.5U CN203535127U (en) 2013-07-11 2013-07-11 Zinc oxide lightning arrester on-line monitor

Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630769A (en) * 2013-07-11 2014-03-12 保定市超人电子有限公司 Online zinc oxide arrester monitoring instrument
CN104655958A (en) * 2015-01-29 2015-05-27 杭州申昊科技股份有限公司 On-line monitoring system for lightning arrester

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630769A (en) * 2013-07-11 2014-03-12 保定市超人电子有限公司 Online zinc oxide arrester monitoring instrument
CN104655958A (en) * 2015-01-29 2015-05-27 杭州申昊科技股份有限公司 On-line monitoring system for lightning arrester
CN104655958B (en) * 2015-01-29 2018-08-31 杭州申昊科技股份有限公司 A kind of arrester on-line monitoring system

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Granted publication date: 20140409

Termination date: 20140711