CN102623967B - Middle voltage bus bar electric arc light protection method and system - Google Patents

Middle voltage bus bar electric arc light protection method and system Download PDF

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Publication number
CN102623967B
CN102623967B CN201210099204.6A CN201210099204A CN102623967B CN 102623967 B CN102623967 B CN 102623967B CN 201210099204 A CN201210099204 A CN 201210099204A CN 102623967 B CN102623967 B CN 102623967B
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arc
unit
current
main control
control unit
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CN102623967A (en
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李立生
李建修
邵志敏
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
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Abstract

The invention discloses a kind of middle voltage bus bar electric arc light protection method and system, it comprises main control unit, and the input of main control unit is connected with at least one auxiliary unit, and the output of main control unit is connected with at least one circuit breaker; Described each auxiliary unit respectively with arc light unit, current unit is connected with current unit, and described arc light unit is connected with arc photosensor, and described current unit is connected with current sensor, and described current unit is connected with temperature sensor.Sensitive volume sensitivity of the present invention can adjust at arc light unit and main control unit, and this sensitivity is subject to the impact of arc photosensor and fiber lengths, and sensitivity can adjust between 10-50KLUX scope.Electric arc protection can excise middle voltage bus bar fault fast,? ensure the safe operation of transmission and distribution network.

Description

Middle voltage bus bar electric arc light protection method and system
Technical field
The present invention relates to a kind of middle voltage bus bar electric arc light protection method and system, belong to electric arc protection field.
Background technology
In, low-voltage bus bar be short-circuited fault time, the arclight produced can cause great injury to equipment and personnel.The quick bus protection of general not configure dedicated in current middle voltage bus bar system at home; but rely on the backup protection excision busbar short-circuit fault of upper level transformer; this results in the prolongation of fault clearing time; increase the degree of injury of equipment; may cause the accident when destroying serious and expand further, threaten the stable operation of system.Arc protection is exactly specially for the quick protection of middle voltage bus bar; arclight in use sense light probe monitoring switch cabinet; once generation flashing; protection quick acting; general within 4ms; excision service entrance switch, so just can greatly reduce the accident and loss that cause not rapidly because of protection act.
Due to historical reasons, for a long time, the protection of people to middle voltage bus bar is paid little attention to always.Corresponding research is less.At present, in more American-European countries, increasing user adopts electric arc protection to open the light the protection of cabinet internal fault as mesolow, and in some these protective devices of country become, the standard configuration of low-tension switch cabinet.Domestic existing middle-low voltage switch cabinet and bus protection scheme all can not meet the requirement of excision fault or protection coverage fast.
Summary of the invention
Object of the present invention is exactly to solve the problem; a kind of middle voltage bus bar arc light protection system is provided; it has that principle is simple, reliable in action rapidly, to transforming plant primary equipment without particular/special requirement, be adapted to various operational mode and under various operational mode, protect advantages such as not needing switching, for generation current factory, transformer station, industry and business distribution system 380V-35kV middle voltage bus bar protect desirable solution.
To achieve these goals, the present invention adopts following technical scheme:
A kind of middle voltage bus bar electric arc light protection method, the detecting step of the method is as follows:
Step 1: the arc light first in arc photosensor sense switch cabinet, and the arc light data detected are passed to main control unit by optical fiber or data wire;
Step 2: then current unit detects A, B, C three-phase current, and the current data detected is sent to main control unit by optical fiber or data wire;
Step 3: secondly arc sound unit detects voice signal by optical fiber acoustic sensor, and utilizes optical fiber or data wire to be sent to main control unit the voice signal detected;
Step 4: if arc sound unit inspection to the size of voice signal exceeded the limit value of voice signal, main control unit will detect arc light intensity and current data;
Step 5: if the arc light intensity that arc photosensor detects is greater than the arc light intensity of setting, then arclight is started mark and put 1; If in A, B, C three-phase current that current transformer detects, wherein certain phase current is greater than the size of current of setting, and current start mark puts 1 simultaneously; When arclight starts mark and current start mark is all 1, be then judged to arclight and break down, start protective relaying device trip signal, disconnect upper level circuit breaker, isolated fault point; If there is a wherein startup mark not to be set to 1, then continue to perform step 1 and 2.
A kind of middle voltage bus bar arc light protection system, it comprises main control unit, and the input of main control unit is connected with at least one auxiliary unit, and the output of main control unit is connected with at least one circuit breaker;
Described each auxiliary unit respectively with arc light unit, arc sound unit, current unit is connected with current unit, described arc light unit is connected with arc photosensor, described arc sound unit is connected with optical fiber acoustic sensor, described current unit is connected with current sensor, and described current unit is connected with temperature sensor.
Described main control unit has 4 data transmission interfaces, and each interface can access 6 arc light units or current unit; The output interface of main control unit is then connected with 4 road fast trips and 6 road conventional relays tripping operations.
Described auxiliary unit is arranged in middle voltage bus bar switch cubicle, is made up of optical fiber triplexer, and each auxiliary unit can access 10 arc photosensors, 1 portable arc optical sensor and 1 temperature sensor.
Described arc light unit has 10 arc light detecting interfaces, and these interfaces are optical fiber interface, for connecting arc photosensor.
Described arc photosensor is arranged in each compartment of switch cubicle, for detecting the photoinduction element of arc light.
Operation principle is as follows: middle voltage bus bar arc light protection system is made up of parts such as main control unit, auxiliary unit, current unit, arc light units.Use optical fiber and data wire to transmit trip signal and data message between each parts.Arc photosensor can be connected to main control unit or arc light unit, and (arc photosensor directly can receive main control unit; if switch cubicle or the bus quantity of needs protection are few; arc light unit can be omitted); current unit is then for transmission current signal; arc light protection system measures the arc light in switch cubicle by arc photosensor; if current unit has measured over-current signal simultaneously, be then judged to and created arclight fault.Once arclight fault be detected, then protection system sends trip command in 1ms, reaches protection object.
Beneficial effect of the present invention:
The present invention is owing to obtaining without any activity or charged parts; transducer is very easily installed; any misoperation can not be there is; also without any need for maintenance. the sensitive volume sensitivity of arc light protection system can adjust at arc light unit and main control unit. and this sensitivity is subject to the impact of arc photosensor and fiber lengths. and sensitivity can adjust between 10-50KLUX scope. and electric arc protection can excise middle voltage bus bar fault fast, ensures the safe operation of transmission and distribution network.
Accompanying drawing explanation
Fig. 1 is middle voltage bus bar arc light protection system structured flowchart;
Fig. 2 is scheme of installation of the present invention;
Fig. 3 is the course of work of the present invention and principle schematic;
Wherein: 1 main control unit, 2 auxiliary units, 3 arc light units, 4 electric current electricity units, 5 temperature unit, 31 arc photosensors, 41 current transformers, 51 temperature sensors, 6 killer switches, 7 arc sound unit, 71 arc sonic transducers.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, middle voltage bus bar arc light protection system is made up of parts such as main control unit 1, auxiliary unit 2, current unit 4, arc light unit 3 and killer switches 6.Use optical fiber and data wire to transmit trip signal and data message between each parts.Arc photosensor 31 can be connected to main control unit 1 or arc light unit 3(arc photosensor directly can receive main control unit; if switch cubicle or the bus quantity of needs protection are few; arc light unit can be omitted); current unit 4 is for transmission current signal; arc light protection system measures the arc light in switch cubicle by arc photosensor 31; if current unit 4 has measured over-current signal simultaneously, be then judged to and created arclight fault.Once arclight fault be detected, then protection system sends trip command in 1ms, reaches protection object.
Main control unit 1 manages, control whole arc light protection system; include current detecting and breaker fail protection; by detecting short circuit current and the action message from arc photosensor 31, and the data of collecting are processed, judged, send trip signal to excise fault.This system only has when arc light and overcurrent being detected at the same time and just sends trip command.When lead-in circuit breaker fails action excision fault, it will start breaker fail protection logic, send trip command and excise fault to upstream circuit breaker.In addition, the temperature that the action message of the arc photosensor 31 that main control unit 1 sends according to auxiliary unit 2 and temperature sensor 51 are measured, location and the temperature alarming information of arc fault point are provided, main control unit 1 has 4 transfer of data interface message processor (IMP)s i.e. 4 data input port, each interface can connect 6 arc lights or current unit, can connect 24 arc lights or current unit altogether.Output interface then comprises 4 road fast trips and exports and 6 road conventional relays tripping operation outputs.
Auxiliary unit 2 is arranged in middle voltage bus bar switch cubicle, is made up of optical fiber triplexer, each auxiliary unit 2 accessible 10 arc photosensors, 31,1 portable arc optical sensor and 1 temperature sensor 51.The address of auxiliary unit 2 is set by plucking number sign switch.When system generation arc fault, auxiliary unit 2 is collected the action message from arc photosensor 31 and is sent main control unit 1 to, and main control unit 1 shows the address number of auxiliary unit 2 and arc photosensor 31, is conducive to overhauling in time and fixing a breakdown.
Arc light unit 3 is for detecting arc light, and have 10 arc light detecting interfaces, these interfaces are optical fiber interface, for connecting arc photosensor 31.The photosensitive intensity of arc photosensor 31 then can regulate setting by the potentiometer on arc light unit 3 panel, can be adjusted to from 10KLUX the arc light data that 50KLUX. arc light unit 3 detects and pass to main control unit 1 by optical fiber or data wire, main control unit 1 determines whether export trip signal according to the logic criterion of setting.
Arc sound unit 7 is for detecting arcing sounds signal, and arc sound unit 7 detects voice signal by arc sonic transducer 71, utilizes optical fiber or data wire to be sent to main control unit 1, and main control unit 1 determines whether export trip signal according to the sound limit value criterion of setting.
Current unit 4 is for sensed current signal, and A, B, C three-phase current all can detect.Current unit 4 can mate the current transformer 41 of 1A, 2A and 5A, adjusting of electric current, and can regulate from the potentiometer panel, setting range is from 50% to 500%.Current unit 4 detects that current data is sent to main control unit 1 by optical fiber or data wire, and main control unit 1 determines whether export trip signal according to the logic criterion of setting.
Arc photosensor 31 is arranged in each compartment of switch cubicle, for detecting the photoinduction element of arc light.When there is arclight fault, the intensity of light can increase considerably, and the photo-sensitive cell in arc photosensor 31 will be converted to the signal of telecommunication to arc light unit 3 or main control unit 1 light signal, and light signal is converted to current signal and send auxiliary unit 2 to.
Arc sonic transducer 71 is arranged in switch cubicle, is the optical fiber acoustic sensor of detection arc sound. and arc sound is a kind of physical phenomenon of fault electric arc discharge process association, and just occurs before fault electric arc produces.Arc sonic transducer 71 extracts arc acoustical signal and passes to arc sound unit 7 or main control unit 1. and voice signal is converted to current signal and send auxiliary unit 2 to.
Main control unit 1 receives arc sound, arc light, current transducer signal, because arc sound is a kind of physical phenomenon of fault electric arc discharge process association, and just occur before fault electric arc produces, and arc light and electric current generally occur simultaneously, first main control unit 1 receives arc acoustical signal, sends alarm signal, when receiving arc light and overcurrent signal, Acceleration of starting Trip Logic, accelerating relay tripping relative breaker, excision fault.
Temperature sensor 51 can be used for the temperature of the critical component (such as busbar joint) monitoring inside switch cabinet, and when exceeding its setting value, main control unit can send alarm signal.
Middle voltage bus bar arc light protection system has that principle is simple, reliable in action rapidly, to transforming plant primary equipment without particular/special requirement, be adapted to various operational mode and under various operational mode, protect advantages such as not needing switching; for generation current factory, transformer station, industry and business distribution system 380V-35kV middle voltage bus bar protect desirable solution, in-site installation as shown in Figure 2.
The course of work and principle such as Fig. 3 describe: arc photosensor 31 detects arc light intensity, if be greater than definite value Lz, arclight starts mark and puts 1.Current transformer 41 detects A, B, C three-phase current, if wherein certain phase current is greater than definite value Iz, current start mark puts 1.When arclight startup mark and current start mark are all 1, start protective relaying device trip signal, disconnect upper level circuit breaker, isolated fault point.Temperature sensor 51 sense switch in-cabinet temperature, is greater than definite value Tz, produces alarm signal, does not participate in Trip Logic and judges, only as reference detection limit.
Due to without any activity or charged parts, transducer is very easily installed, and any misoperation can not occur, also without any need for maintenance.The sensitive volume sensitivity of arc light protection system can adjust at arc light unit 3 and main control unit 1, and this sensitivity is subject to the impact of arc photosensor 31 and fiber lengths, and sensitivity can adjust between 10-50KLUX scope.Electric arc protection can excise middle voltage bus bar fault fast, ensures the safe operation of transmission and distribution network.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.

Claims (4)

1. a middle voltage bus bar electric arc light protection method, is characterized in that, the detecting step of the method is as follows:
Step 1: the arc light first in arc photosensor sense switch cabinet, and the arc light data detected are passed to main control unit by optical fiber or data wire;
Step 2: then current unit detects A, B, C three-phase current, and the current data detected is sent to main control unit by optical fiber or data wire; Current unit detects that current data is sent to main control unit by optical fiber or data wire, and main control unit determines whether export trip signal according to the logic criterion of setting;
Step 3: secondly arc sound unit detects voice signal by optical fiber acoustic sensor, and utilizes optical fiber or data wire to be sent to main control unit the voice signal detected;
Step 4: if arc sound unit inspection to the size of voice signal exceeded the limit value of voice signal, main control unit will detect arc light intensity and current data;
Step 5: if the arc light intensity that arc photosensor detects is greater than the arc light intensity of setting, then arclight is started mark and put 1; If in A, B, C three-phase current that current transformer detects, wherein certain phase current is greater than the size of current of setting, and current start mark puts 1 simultaneously; When arclight starts mark and current start mark is all 1, be then judged to arclight and break down, start protective relaying device trip signal, disconnect upper level circuit breaker, isolated fault point; If there is a wherein startup mark not to be set to 1, then continue to perform step 1 and 2;
The middle voltage bus bar arc light protection system of application, comprise main control unit, the input of main control unit is connected with at least one auxiliary unit, and the output of main control unit is connected with at least one circuit breaker;
Described each auxiliary unit is connected with arc light unit, arc sound unit, current unit and temperature unit respectively, described arc light unit is connected with arc photosensor, described arc sound unit is connected with optical fiber acoustic sensor, described current unit is connected with current sensor, and described temperature unit is connected with temperature sensor;
System only has when arc light and overcurrent being detected at the same time and just sends trip command, when lead-in circuit breaker fails action excision fault, it will start breaker fail protection logic, send trip command and excise fault to upstream circuit breaker, in addition, the action message of the arc photosensor that main control unit sends according to auxiliary unit and the temperature of temperature sensor measurement, location and the temperature alarming information of arc fault point are provided, main control unit has 4 transfer of data interface message processor (IMP)s i.e. 4 data input port, each interface can connect 6 arc lights or current unit, 24 arc lights or current unit can be connect altogether, the output interface of main control unit is then connected with 4 road fast trips and exports and 6 road conventional relays tripping operation outputs,
The input of main control unit is connected with at least one auxiliary unit, and the output of main control unit is connected with at least one circuit breaker.
2. middle voltage bus bar electric arc light protection method as claimed in claim 1; it is characterized in that; described auxiliary unit is arranged in middle voltage bus bar switch cubicle; be made up of optical fiber triplexer, each auxiliary unit can access 10 arc photosensors, 1 portable arc optical sensor and 1 temperature sensor.
3. middle voltage bus bar electric arc light protection method as claimed in claim 1, it is characterized in that, described arc light unit has 10 arc light detecting interfaces, and these interfaces are optical fiber interface, for connecting arc photosensor.
4. middle voltage bus bar electric arc light protection method as claimed in claim 1, it is characterized in that, described arc photosensor is arranged in each compartment of switch cubicle, for detecting the photoinduction element of arc light.
CN201210099204.6A 2012-04-07 2012-04-07 Middle voltage bus bar electric arc light protection method and system Active CN102623967B (en)

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US20140043714A1 (en) * 2012-08-07 2014-02-13 James J. Benke Switchgear including a circuit breaker having a trip unit with an interface to a number of arc fault sensors
CN103809043B (en) * 2012-11-08 2016-06-08 南京南瑞继保电气有限公司 A kind of detection method of discrimination of arclight fault
CN103558460A (en) * 2013-08-16 2014-02-05 国家电网公司 Medium-voltage system arc fault detection device
CN103441474A (en) * 2013-08-28 2013-12-11 上海建安化工设计有限公司 Digital electric arc protection system for chemical engineering equipment
CN103618284A (en) * 2013-11-22 2014-03-05 安徽昌南电气科技有限公司 Low-voltage arc-light quick-acting switching-off control device
CN104300512A (en) * 2014-09-22 2015-01-21 合肥凯正电气技术有限公司 Busbar short circuit arc light extending protection method
CN104377664B (en) * 2014-11-07 2017-10-20 成龙建设集团有限公司 Mesolow arc light busbar protective device group
CN104466927B (en) * 2014-12-31 2017-03-08 重庆布鲁杰科技有限公司 End security protection and control device and its control method
CN104617564A (en) * 2015-01-20 2015-05-13 云南电网有限责任公司电力科学研究院 Arc light protection method for electrical equipment
CN106093675A (en) * 2016-06-06 2016-11-09 国家电网公司 A kind of arc photosensor and arc light processing method
CN106410970B (en) * 2016-11-11 2019-01-25 南京南瑞继保电气有限公司 A kind of arc light protective device and guard method with light intensity signal recording function
CN107528300A (en) * 2017-09-30 2017-12-29 扬中市华荣电器设备有限公司 The method for early warning of low-tension switch cabinet arc fault
CN109038511B (en) * 2018-07-30 2020-01-21 国网山东省电力公司德州供电公司 High-voltage cabinet cable compartment protection system and method based on photo-thermal early warning and arc transfer
CN109142852A (en) * 2018-09-11 2019-01-04 国网江苏省电力有限公司泰州供电分公司 A kind of bus arc light protection method based on petal type power grid
CN110416977B (en) * 2019-06-14 2021-06-29 国网河南省电力公司灵宝市供电公司 Bus protection module for locking ground signal
CN111579947B (en) * 2020-05-25 2021-11-23 南京航空航天大学 Series arc multi-feature detection applied to direct current system

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