CN106093683A - Heater broken wire detection system and wire break detection method - Google Patents
Heater broken wire detection system and wire break detection method Download PDFInfo
- Publication number
- CN106093683A CN106093683A CN201610512405.2A CN201610512405A CN106093683A CN 106093683 A CN106093683 A CN 106093683A CN 201610512405 A CN201610512405 A CN 201610512405A CN 106093683 A CN106093683 A CN 106093683A
- Authority
- CN
- China
- Prior art keywords
- heater
- detector unit
- current
- threshold value
- detection system
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The present invention relates to heater broken wire detection system and wire break detection method, detecting system includes at least one detector unit, detector unit includes three heaters, each phase in three-phase alternating current is all connected to a junction point by a corresponding heater, and junction point connects zero line by connection line；Detector unit also includes the current measuring device for detecting the out-of-balance current on connection line.When actively cutting off heater, electric current superposition value is zero, and current detecting and judge module will not report disconnection signal by mistake, so, this mode can solve the problem that the problem of wrong report disconnection signal when auto controlled heater puts into or cuts off.Meanwhile, less components and parts can be used to monitor more heater.
Description
Technical field
The present invention relates to heater disconnection monitoring field, be specifically related to heater broken wire detection system and burn out detection side
Method.
Background technology
Regardless of the heater used in the heater used in family or factory, power supply is alternating current, single-phase
It is powered by alternating current, so, can obtain what whether heater broke by the current values in detection supply line
Information.
At present conventional heater wire break detection method is undercurrent detection, and the principle of utilization is: when heating installation power supply just
Chang Shi, supply line also exists certain electric current；When heating installation power supply circuit disconnects, i.e. during heater broken string, supply lines
Electric current on road is the least or does not just have electric current.So, when carrying out heater burn out detection, first detect the confession of heater
Electric current in electric line, if less than normal value certain amplitude, i.e. judging that this heater breaks, or judge this heater failure.
This mode can detect whether heater breaks to a certain extent, but, if actively cut not in use by heater
During the supply line of disconnected heater, owing to the most there is not electric current in supply line, then, based on above-mentioned undercurrent detection mode
Detection device will send heater broken string information, cause erroneous judgement.
Summary of the invention
It is an object of the invention to provide a kind of heater broken wire detection system, in order to solve existing detection device in heating
Device there will be erroneous judgement problem when actively cutting off supply line.Present invention simultaneously provides a kind of heater wire break detection method.
For achieving the above object, the solution of the present invention includes a kind of heater broken wire detection system, examines including at least one
Surveying unit, described detector unit includes three heaters, and each phase in three-phase alternating current is all by a corresponding heater
Being connected to same junction point, described junction point connects zero line by connection line；Described detector unit also includes for detecting
Out-of-balance current on described connection line also carries out, according to out-of-balance current, the current measuring device that broken string judges.
Described detector unit also includes that signal output apparatus, the output of described current measuring device connect described signal output dress
Put, for the outputting alarm signal when measurement result is more than the comparison threshold value of a setting.
Described detector unit also includes going here and there the control switch being located on described connection line, and described current measuring device controls
Connect described control to switch, switch for controlling described control of disconnection when measurement result is more than the comparison threshold value of a setting.
Described current measuring device is the coiler part of a relay, described control switch touching for described relay
Point.
Described detecting system includes three described detector units.
A kind of heater wire break detection method based on above-mentioned heater broken wire detection system, first, detects connection line
On electric current, obtain corresponding current value, then, relatively described current value and the size comparing threshold value set in advance, work as institute
State current value less than described compare threshold value time, it is determined that the heater in corresponding detector unit does not break；When described current value is big
In described compare threshold value time, it is determined that there is broken string situation in the heater in corresponding detector unit.
When described current value more than described compare threshold value time, signal output apparatus outputting alarm signal.
When described current value more than described compare threshold value time, after the delay adjustments time, signal output apparatus outputting alarm believe
Number.
When described current value more than described compare threshold value time, control disconnect control switch.
When described current value more than described compare threshold value time, after the delay adjustments time, control disconnect control switch.
The heater broken wire detection system that the present invention provides includes that at least one detector unit, each detector unit are one
Independent detection equipment, one group of heater can be detected by each detector unit, so, this detection device can be according to reality
Border needs to increase or reduce detection equipment, meets the motility of detection, and, when arranging multiple detector unit, it is possible to
Many group heaters are detected, improves the efficiency of detection.
And, for any one detector unit, each phase in three-phase alternating current is all by a corresponding heater
Being connected to same junction point, this junction point connects zero line by connection line, uses current measuring device to detect this connecting line
Out-of-balance current on road, detection is the superposition value of three heating installation power supply electric currents, so, if three heaters are the most normal
Work, when not breaking, electric current superposition value is zero or is small value, obtains the conclusion that three heaters normally work；If
When three heater status are inconsistent, such as, when one phase or biphase appearance broken string, electric current superposition value has certain numerical value, is had
The conclusion of heater broken string.So, can detect whether heater breaks in this way.
The most important thing is, when actively cutting off heater, electric current superposition value is zero, and current measuring device will not be reported by mistake disconnected
Line, so, this mode can solve the problem that the problem that will not report broken string when auto controlled heater cuts off by mistake.
Accompanying drawing explanation
Fig. 1 is heater broken wire detection system structural principle schematic diagram；
Fig. 2 is heater broken thread detector circuit theory schematic diagram.
Detailed description of the invention
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Embodiment 1
Heater broken wire detection system includes heater broken thread detector and corresponding heater, will heater pair
Should be arranged in detection device and just constitute this detecting system, so, below this detection device is described in detail.
Heater broken thread detector includes that at least one detector unit, each detector unit are a single test section
Point, it being independent of each other between detector unit, the number of detector unit can be set according to the actual requirements, for the ease of saying
Bright, the present embodiment is as a example by three detector units, as shown in Figure 1.
As it is shown in figure 1, heater broken thread detector includes three detector units, the structure phase of these three detector unit
With, so, the present embodiment illustrates as a example by first detector unit.
As in figure 2 it is shown, this detector unit includes three pairs of connectivity ports, first to for A1 and A2, and second to for B1 and B2,
Three pairs is C1 and C2, and these three pairs of connectivity ports are used to connect the feeder ear of heater, so, a detector unit has access to
Three heaters, A1 and A2 connects first heater, B1 and B2 connects second heater, C1 and C2 connects the 3rd heating
Device.
A in three-phase alternating current be connected port A1, port A2 connect points of common connection M；Similarly, in three-phase alternating current
B be connected port B1, port B2 connect points of common connection M；C in three-phase alternating current be connected port C1, port C2 connect
Points of common connection M, points of common connection M connect zero line by connection line.So, by three heater correspondences are linked into phase
On the connectivity port answered, it is possible to be embodied as three heating installation power supplies.
This detector unit also includes current measuring device, and signal output apparatus.Current measuring device can be one
Integral device, ratio is if carrying out the electronic mutual inductor of data process, it is also possible to be formed by connecting by several ingredients
Structure, is such as made up of current detecting part and data process part, and data processing section sampling connects current detecting part.Electricity
Electric current on stream test section demultiplexing connection line between detection points of common connection M and zero line, data processing section is used for root
Carry out broken string according to the electric current of detection to judge.Wherein, current detecting part can be the equipment such as current transformer, data processing section
Can be the equipment such as control chip；Signal output apparatus be can the equipment of output correlation signal, such as alarm.
According to the above-mentioned mode of connection, flow through current detecting part is superposition value I of three-phase heater supply currentABC。
The Thoughts of this current measuring device is the out-of-balance current on detection connection line, according to the electric current detected
Carrying out broken string to judge, operation principle is: when three heating installation power supplies are all normal, when the situation that the most do not breaks occurs, three
Individual heater status is consistent, owing to the power of three heaters under normal circumstances is same or like, then, on connection line
Superposition value I of three electric currentsABCBeing zero or for small value, this small value may be added by three-phase four-wire system alternating current power supply or three
The error of hot device power (resistance) causes；When these three heater status is inconsistent, such as occur in which a heater or
During the power supply line breaking of two heaters of person, superposition value I of three electric currents on connection lineABC=wherein heat phase device
Electric current I during electric current normal heating1(virtual value).So, data processing section arranges one and compares threshold value, when three add
When hot device is powered all normal, when the situation that the most do not breaks occurs, superposition value IABCThreshold value is compared less than this；When three heaters
During middle appearance broken string situation, superposition value IABCIt is greater than this and compares threshold value.By comparing actual electric current superposition value and comparing threshold value
Size realize broken string detection.
When the electric current superposition value detected is more than when comparing threshold value, and data processing section is judged as broken string, and defeated to signal
Going out device and export corresponding signal, signal output apparatus sends warning signal, notifies that staff's having heaters occurs in that broken string
Fault.
It addition, put into or issuable false positive signal breaking moment to eliminate heater, arrange in determination strategy
One delay time value.When being judged as broken string, after the delay time value of the above-mentioned setting of time delay, data processing division dividing control signal
Output device outputting alarm signal.
If three heaters accessed in this detector unit break (damage) simultaneously, then this detector unit will be unable to
Judge broken string situation.But owing to whether the break event of (damage) of each heater is independent, according to probability theory, should
The probability P that three heaters accessed in detector unit damage simultaneouslyABC=PA×PB×PC(PA, PB, PCIt is respectively one of them
The probability of heater failure), so PABCThe most small, it is negligible during Practical.
It addition, when actively cutting off heater, such as not in use by heater, use and cut off these three heater simultaneously
Mode (or directly cutting off alternating current power supply), now IABCBeing zero, current detecting part is due to the electric current I detectedABCLess than dynamic
Work value (compares threshold value), so, data processing section will not report broken string information by mistake.Therefore which can solve the problem that when actively cutting off
The problem reporting broken string information during heater by mistake.
Embodiment 2
In the present embodiment, detector unit is not provided with signal output apparatus, but arrange string be located at points of common connection M with
Control switch on connection line between zero line or ground, current measuring device controls to connect this control switch, in this enforcement
In example, current measuring device is the coiler part of an overcurrent relay JR, controls switch on this overcurrent relay
Contact.
In current measuring device according to electric current superposition value carry out broken string judge strategy same as in Example 1.
In order to ensure relay appropriate action, in relay, suitably setting is above-mentioned compares the concrete numerical value of threshold value (also referred to as
Electric current working value) and the action delay time.
The setting principle of electric current working value is, wherein an electric current during heat phase device electric current normal heating is (when normally working
Supply current) I1About 50% be advisable.Due to three-phase four-wire system alternating current power supply or the mistake of three-phase heater power (resistance)
Difference, working value sets too low meeting to be caused reporting disconnection signal by mistake, and working value sets too high meeting to be caused failing to report disconnection signal.
Delay time value refers to when being judged as broken string, contact time delay certain time action.The reason set is to eliminate to add
Hot device puts into or issuable false positive signal breaking moment.
In a word, when the electric current superposition value that the coiler part of overcurrent relay detects is more than working value, send broken string letter
Breath, and after the delay adjustments time, disconnect the contact in relay, it is achieved cut off the purpose of three heating installation power supply circuits.
And, the control signal controlling switch is provided by current measuring device, and needs to be set to self-sustaining pattern, with
Avoid the control signal controlling to switch off three-phase heater after current measurement apparatus to automatically reset and cause controlling switch again
Recover closure state.
It addition, when actively cutting off heater, such as not in use by heater, use and cut off these three heater simultaneously
Mode (or directly cutting off alternating current power supply), now IABCBeing zero, overcurrent relay JR is due to the electric current I detectedABCIt is less than
Working value, so, relay will not action, i.e. will not report broken string information by mistake.So, which can solve the problem that when actively cut-out adds
The problem reporting broken string information during hot device by mistake.
Overcurrent relay is used to carry out detection and the judgement of electric current, if this overcurrent relay there being multiple detection lead to
If road, then, an overcurrent relay just can apply to multiple detector unit.
It addition, in order to convenient to comparing threshold value and movement time is adjusted, above-mentioned overcurrent relay is all right
It it is the most relatively advanced electronic relay.
It is presented above specific embodiment, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, for those of ordinary skill in the art, according to the teachings of the present invention, designs various change
The model of shape, formula, parameter are not required to spend creative work.The most right
Change that embodiment is carried out, revise, replace and modification still falls within protection scope of the present invention.
Claims (10)
1. a heater broken wire detection system, it is characterised in that include that at least one detector unit, described detector unit include
Three heaters, each phase in three-phase alternating current is all connected to same junction point by a corresponding heater, described
Junction point connects zero line by connection line；Described detector unit also includes the uneven electricity for detecting on described connection line
Stream also carries out, according to out-of-balance current, the current measuring device that broken string judges.
Heater broken wire detection system the most according to claim 1, it is characterised in that described detector unit also includes signal
Output device, the output of described current measuring device connects described signal output apparatus, is used in measurement result more than a setting
Relatively outputting alarm signal during threshold value.
Heater broken wire detection system the most according to claim 1, it is characterised in that described detector unit also includes that string sets
Control switch on described connection line, described current measuring device controls to connect described control and switchs, for measuring knot
Fruit is more than controlling during the comparison threshold value of a setting to disconnect described control switch.
Heater broken wire detection system the most according to claim 3, it is characterised in that described current measuring device is one
The coiler part of relay, described control switch is the contact of described relay.
Heater broken wire detection system the most according to claim 1, it is characterised in that described detecting system includes three institutes
State detector unit.
6. a heater wire break detection method based on heater broken wire detection system described in claim 1, it is characterised in that
First, the electric current on detection connection line, obtain corresponding current value, then, relatively described current value and ratio set in advance
The size of relatively threshold value, when described current value less than described compare threshold value time, it is determined that the heater in corresponding detector unit does not break
Line；When described current value more than described compare threshold value time, it is determined that there is broken string situation in the heater in corresponding detector unit.
Heater wire break detection method the most according to claim 6, it is characterised in that when described current value is more than described ratio
Relatively during threshold value, signal output apparatus outputting alarm signal.
Heater wire break detection method the most according to claim 7, it is characterised in that when described current value is more than described ratio
Relatively during threshold value, after the delay adjustments time, signal output apparatus outputting alarm signal.
Heater wire break detection method the most according to claim 6, it is characterised in that when described current value is more than described ratio
Relatively during threshold value, control to disconnect control switch.
Heater wire break detection method the most according to claim 9, it is characterised in that when described current value is more than described
Relatively during threshold value, after the delay adjustments time, control to disconnect control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610512405.2A CN106093683B (en) | 2016-06-29 | 2016-06-29 | Heater broken wire detection system and wire break detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610512405.2A CN106093683B (en) | 2016-06-29 | 2016-06-29 | Heater broken wire detection system and wire break detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106093683A true CN106093683A (en) | 2016-11-09 |
| CN106093683B CN106093683B (en) | 2019-03-12 |
Family
ID=57212097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610512405.2A Active CN106093683B (en) | 2016-06-29 | 2016-06-29 | Heater broken wire detection system and wire break detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106093683B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761270A (en) * | 2018-08-18 | 2018-11-06 | 无锡诚勇自动化技术有限公司 | A kind of wire break alarm |
| CN110456839A (en) * | 2019-08-27 | 2019-11-15 | 昌龙兴科技（深圳）有限公司 | A kind of intelligent temperature control system based on PID |
| CN112054492A (en) * | 2020-09-09 | 2020-12-08 | 南方电网数字电网研究院有限公司 | Phase-loss fault detection method and device, storage medium and power distribution gateway |
| CN113945778A (en) * | 2020-07-17 | 2022-01-18 | 中国石油化工股份有限公司 | Multi-section heating state monitoring device for electric roasting furnace |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316648A (en) * | 2001-02-28 | 2001-10-10 | 张国屏 | Method for monitoring electric comsumption |
| CN101162255A (en) * | 2007-11-16 | 2008-04-16 | 国电南瑞科技股份有限公司 | Method for testing CT yarn cutting through estimating out-of-balance current variation |
| CN102004224A (en) * | 2009-08-31 | 2011-04-06 | 比亚迪股份有限公司 | Three-phase motor phase failure detection system and detection method thereof |
| CN102116822A (en) * | 2010-12-30 | 2011-07-06 | 易事特电力系统技术有限公司 | Method for detecting power failure of power grid for three-phase uninterruptable power supply |
| JP2012220330A (en) * | 2011-04-08 | 2012-11-12 | Panasonic Corp | Distributed power generating system |
| CN102801131A (en) * | 2012-09-06 | 2012-11-28 | 重庆大学 | Neutral line breaking detection protection method and device |
| CN102937687A (en) * | 2012-10-26 | 2013-02-20 | 杨万钟 | Method for distinguishing disconnection fault and grounding fault during grounding of neutral point through small resistor |
| CN203850817U (en) * | 2014-06-05 | 2014-09-24 | 彭浩明 | Device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring |
| CN203983950U (en) * | 2014-07-04 | 2014-12-03 | 四川工程职业技术学院 | Broken neutral line automatic safety device |
| KR101600376B1 (en) * | 2015-09-14 | 2016-03-07 | (주)비앤와이이엔지 | Fault detection device in underground distribution lines |
-
2016
- 2016-06-29 CN CN201610512405.2A patent/CN106093683B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316648A (en) * | 2001-02-28 | 2001-10-10 | 张国屏 | Method for monitoring electric comsumption |
| CN101162255A (en) * | 2007-11-16 | 2008-04-16 | 国电南瑞科技股份有限公司 | Method for testing CT yarn cutting through estimating out-of-balance current variation |
| CN102004224A (en) * | 2009-08-31 | 2011-04-06 | 比亚迪股份有限公司 | Three-phase motor phase failure detection system and detection method thereof |
| CN102116822A (en) * | 2010-12-30 | 2011-07-06 | 易事特电力系统技术有限公司 | Method for detecting power failure of power grid for three-phase uninterruptable power supply |
| JP2012220330A (en) * | 2011-04-08 | 2012-11-12 | Panasonic Corp | Distributed power generating system |
| CN102801131A (en) * | 2012-09-06 | 2012-11-28 | 重庆大学 | Neutral line breaking detection protection method and device |
| CN102937687A (en) * | 2012-10-26 | 2013-02-20 | 杨万钟 | Method for distinguishing disconnection fault and grounding fault during grounding of neutral point through small resistor |
| CN203850817U (en) * | 2014-06-05 | 2014-09-24 | 彭浩明 | Device for achieving null line breaking alarm and protection based on three-phase four-line current monitoring |
| CN203983950U (en) * | 2014-07-04 | 2014-12-03 | 四川工程职业技术学院 | Broken neutral line automatic safety device |
| KR101600376B1 (en) * | 2015-09-14 | 2016-03-07 | (주)비앤와이이엔지 | Fault detection device in underground distribution lines |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761270A (en) * | 2018-08-18 | 2018-11-06 | 无锡诚勇自动化技术有限公司 | A kind of wire break alarm |
| CN110456839A (en) * | 2019-08-27 | 2019-11-15 | 昌龙兴科技（深圳）有限公司 | A kind of intelligent temperature control system based on PID |
| CN113945778A (en) * | 2020-07-17 | 2022-01-18 | 中国石油化工股份有限公司 | Multi-section heating state monitoring device for electric roasting furnace |
| CN112054492A (en) * | 2020-09-09 | 2020-12-08 | 南方电网数字电网研究院有限公司 | Phase-loss fault detection method and device, storage medium and power distribution gateway |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106093683B (en) | 2019-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111373622A (en) | Nested microgrid control system | |
| CN106093683A (en) | Heater broken wire detection system and wire break detection method | |
| CN102315966B (en) | Service single board, fault detection and reporting method and system thereof | |
| CN103606910A (en) | Wide area information based fault self-healing method for dead zone of feeder outlet of distribution network | |
| CN101803136A (en) | Differential protection method, system and device | |
| CN103887780B (en) | Based on the network type guard method of the mixed networking that open loop mode runs | |
| CN106300254A (en) | A kind of relay protecting method identifying the single-phase or biphase broken string of circuit | |
| CN105099825B (en) | A kind of safeguard method and device of external Bypass | |
| CN104444682A (en) | Method for detecting and predicating elevator landing door lock fault | |
| CN103683276A (en) | An intelligent static state switch, a control system thereof, and a fault monitoring method | |
| CN106054015A (en) | Navigation aid lamp isolation transformer open-circuit state monitoring device and control method | |
| CN109610542A (en) | A kind of two-wheel flute milling machine CAN line fault positioning system and localization method | |
| CN108616114A (en) | A kind of power distribution network distributed layer protection system and method for the group containing microgrid | |
| CN204945313U (en) | A kind of high voltage direct current distribution insulation against ground supervisory device | |
| CN107276062A (en) | Correct a mistake method, device and the electrical equipment of wiring | |
| CN104810792A (en) | Electric leakage protection device and control method thereof | |
| CN104793094B (en) | Detection circuit and method, electric heating system for electric heater | |
| CN106340954A (en) | Method for identifying line breaking of power supply line and switching to standby power supply | |
| CN206908291U (en) | Correct a mistake the device and electrical equipment of wiring | |
| CN208723536U (en) | A kind of electromotor integrated protection system for extractive equipment | |
| CN103856338A (en) | Automatic bypass device and method for tandem connection of communication device | |
| CN205579863U (en) | Air conditioner heating control circuit | |
| CN108981181A (en) | Electric heater and its heating control apparatus and method | |
| CN107346004A (en) | A kind of signal lamp failure detection means based on voltage effective value | |
| CN109066604B (en) | Generator low-voltage protection system of million-kilowatt nuclear power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |