CN107390019A - The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption - Google Patents
The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption Download PDFInfo
- Publication number
- CN107390019A CN107390019A CN201610333710.5A CN201610333710A CN107390019A CN 107390019 A CN107390019 A CN 107390019A CN 201610333710 A CN201610333710 A CN 201610333710A CN 107390019 A CN107390019 A CN 107390019A
- Authority
- CN
- China
- Prior art keywords
- distribution box
- power consumption
- equipment
- phase
- voltage
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 title claims abstract description 15
- 238000012806 monitoring device Methods 0.000 claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 3
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002596 correlated effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000020169 heat generation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of on-Line Monitor Device of distribution box power consumption and its measurement determination methods, it is characterized in that, distribution box power consumption is first decomposed into the power consumption and distribution box of distribution box equipment consumption power consumption caused by the contact resistance of contact point.Monitoring device is by gathering the associated voltage and current parameters of synchronization, and to correlated current difference Sampling, calculates power consumption caused by the contact resistance of contact point in the power consumption and distribution box of distribution box equipment consumption.When the power consumption of equipment consumption is more than certain certain value, judge that equipment power dissipation is unqualified in distribution box.When power consumption caused by contact resistance is more than certain certain value, judge that distribution box contact resistance power consumption is exceeded.Power consumption caused by power consumption caused by distribution box equipment and contact resistance is added as the total power consumption of distribution box.Monitoring device has process circuit, alternating current sampling circuit, communication unit and display unit, and the current value and magnitude of voltage of inlet-outlet line are gathered by alternating current sampling circuit, while the difference to passing in and out line current is sampled.
Description
Technical field
The present invention relates to low-voltage distribution network to monitor field, more particularly, to a kind of on-Line Monitor Device of distribution box power consumption
And its measurement determination methods.
Background technology
At the scene, the breaker in low-tension distribution box and other parts, which often occur, burns phenomenon, inlet-outlet line cable
Superheating phenomenon also occurs in junction and other positions, and whole distribution box can all blaze up when serious.
There is the reason for the above situation nothing more than following several：First, shove and overvoltage；2nd, overload；3rd, normal current
In the case of break down.And the ratio that in fact the third situation occurs is higher.
When low-tension distribution box in use for some time, breaker contact point occur oxidation and physical location change, busbar
Tie point and inlet-outlet line cable connection point also can be aoxidized gradually, tie point loosened screw sometimes also be present, therefore these positions
Contact resistance can gradually increase.
Contact resistance is from starting to increase, and device fails, time span can be even several years some months to the end.
In this time cycle, the power consumption on these trouble points can gradually increase, it is possible to reach several kilowatts.Therefore wave during this
Substantial amounts of electric energy, or even the open circuit loss considerably beyond transformer are taken.
Contact resistance increase, produces pressure drop, in addition to electric energy is wasted, can also directly contribute equipment catching fire.Such case
Power supply reliability and Electrical Safety are had a strong impact on.
Citing：One low-tension distribution box is 1000 watts burning first trimester, average power consumption, then is wasted altogether within three months
2160 degree of electric energy.
On the other hand, in addition to the conditions already mentioned, also many equipment are also consuming electric energy to consumption electric energy, such as in low-tension distribution box
Breaker, Distribution transformer, three-phase imbalance monitoring terminal, wireless temperature measurement monitoring terminal, harmonic treating apparatus, electric energy meter,
Concentrator, protection device, idle compensating control, combination switch, compensation capacitor and dehydrating unit etc..These equipment are arranged on
, at present can not accurate measurement its overall power after together.Exist different manufacturers production same specification distribution box power consumption difference compared with
Big situation, if distribution box power consumption differs 100 watts, then just consume 876 degree of electric energy more in 1 year.
The method of general measure power consumption is the method with AC sampling at present, i.e., by sampling low-tension distribution box primary voltage
Electric current and line voltage electric current, subtract out linear heat generation rate finally by calculating into linear heat generation rate and obtain distribution box power consumption.This method by
The limitation of voltage and current measurement precision, when near error range, it can not accurately calculate the equipment power dissipation of whole distribution box.
Citing：Distribution box total input-wire is 100A amperes per phase current, then three phases active power is about 66 kilowatts, conventional
Monitoring device active power precision is one-level, and its active power error is 1 percent, then the mistake measured by monitoring device
Difference is more than 600 watts.But common electrical distribution box equipment total power consumption is less than 600 watts, can not accurately measure match somebody with somebody at all according to a conventional method
The equipment power dissipation of electronic box.
Other power consumption of the distribution box equipment under distribution box band load state may with the power consumption under distribution box Light Condition
After meeting is different, and distribution box equipment using breaking down for a period of time, power consumption be able to may also increase.
If the contact resistance that can have contact point in the power consumption and distribution box that a kind of scheme consumes to distribution box equipment produces
Raw power consumption is monitored, and is alerted when power consumption exceedes setting value, by the consumption for substantially reducing electric energy and improves equipment
Electrical Safety.
Based on the above situation, there is an urgent need to a kind of on-Line Monitor Device of distribution box power consumption and its measurement determination methods.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of on-line monitoring of distribution box power consumption
Device and its measurement determination methods.
The technical solution adopted in the present invention is：
The invention discloses a kind of on-Line Monitor Device of distribution box power consumption and its measurement determination methods, it is characterized in that, first
Distribution box power consumption is decomposed into the power consumption and distribution box of distribution box equipment consumption power consumption caused by the contact resistance of contact point.
Monitoring device is by penetrating the inlet wire of a certain phase of distribution box similar to monitoring residual current with mutually all outlets
Small current mutual inductor carries out current differential sampling, obtains the current differential of the phase, in conjunction with the synchronization phase inlet wire
Magnitude of voltage, the power consumption of phase equipment consumption in distribution box is drawn, similarly measures and calculates other two-phase power consumptions, three-phase, which is added, is
For the power consumption of distribution box equipment consumption.The measurement error of small current mutual inductor can accomplish several milliamperes, therefore calculate
Equipment power dissipation error i.e. several watts of zero point, can be ignored compared to equipment power dissipation.When power consumption is more than certain certain value, that is, sentence
The power consumption for determining the consumption of distribution box equipment is unqualified.
Monitoring device by gather the magnitude of voltage of a certain phase inlet wire of distribution box synchronization, the phase outlet magnitude of voltage and electricity
Flow valuve, voltage difference is calculated, mutually go out line current value in conjunction with synchronization this, draw the work(caused by resistance that is in contact
Consumption, similarly measures and calculates other two-phase power consumptions, three-phase is added as in distribution box work(caused by the contact resistance of contact point
Consumption.When power consumption is more than certain certain value, that is, judge that the contact resistance power consumption of contact point in distribution box is exceeded.
Power consumption caused by the contact resistance of contact point, which is added as, in the power consumption and distribution box of the consumption of distribution box equipment matches somebody with somebody
The total power consumption of electronic box.
Monitoring device has process circuit, alternating current sampling circuit, communication unit and display unit, passes through alternating current sampling circuit
The current value and magnitude of voltage of inlet-outlet line are gathered, while the difference to passing in and out line current is sampled.
Brief description of the drawings
Fig. 1 is three-phase equipment load and contact resistance equivalent circuit diagram in distribution box
Fig. 2 is that outlet distribution box A phases inlet-outlet line current differential Δ Ia samples schematic diagram to inlet wire all the way all the way
Fig. 3 is inlet wire outlet distribution box inlet-outlet line schematic diagram all the way all the way
Fig. 4 is that the tunnel outlet distribution box A phase inlet-outlet line current differential Δs Ia of inlet wire three samples schematic diagram all the way
Fig. 5 is the tunnel outlet distribution box inlet-outlet line schematic diagram of inlet wire three all the way
Fig. 6 is monitoring device theory diagram
Fig. 7 is alternating current sampling circuit schematic diagram
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention carries out further detailed utility model.It should be appreciated that specific embodiment described herein is only explaining this hair
It is bright, it is not intended to limit the present invention.
The present invention is further described below in conjunction with accompanying drawing.
Embodiment one
By taking the inlet wire all the way all the way distribution box of outlet as an example, distribution box power consumption is decomposed into the work(of distribution box equipment consumption
Power consumption caused by the contact resistance of contact point in consumption and distribution box.
1st, the power consumption of distribution box equipment consumption
Such as Fig. 2, Fig. 3, monitoring device is by penetrating the inlet wire Iai and outlet Iao of distribution box A phases similar to residual current
The small current mutual inductor of monitoring carries out current differential Δ Ia samplings, the voltage of the current differential combination synchronization of the acquirement phase
Value Uai, A phases equipment power dissipation P in distribution box is calculatedA。
B phases equipment power dissipation and C phases equipment power dissipation are P respectively by that analogyB、PC。
The power consumption P of distribution box equipment consumptionS=PA+PB+PC。
2nd, power consumption caused by the contact resistance of contact point in distribution box
Such as Fig. 1, the magnitude of voltage Uai of monitoring device collection distribution box synchronization inlet wire, the magnitude of voltage Uao of outlet and outlet
Current value Iao, Uai and Uao voltage difference Δ Ua is calculated, in conjunction with the phase current values Iao of synchronization, is calculated and connects
Get an electric shock A phase power consumptions P caused by resistanceA′。
B phases power consumption and C phases power consumption are P respectively by that analogyB′、PC′
The contact resistance power consumption P of contact point in distribution boxJ=PA′+PB′+PC′
3rd, the total power consumption P of distribution boxAlways=PS+PJ。
4th, P is worked asSDuring more than certain certain value, judge that the power consumption of distribution box equipment consumption is unqualified.Work as PJMore than certain certain value
When, judge that the contact resistance power consumption of contact point in distribution box is exceeded.
Embodiment two
By taking the distribution box of the tunnel outlet of inlet wire three all the way as an example, distribution box power consumption is decomposed into the work(of distribution box equipment consumption
Power consumption caused by the contact resistance of contact point in consumption and distribution box.
1st, the power consumption of distribution box equipment consumption
Such as Fig. 4, Fig. 5, monitoring device passes through distribution box inlet wire A phases Iai and first via outlet A phases Iao1, the second tunnel goes out
Line A phases Iao2, the 3rd tunnel outlet A phases Iao3The small current mutual inductor penetrated similar to residual current monitoring carries out current differential
Δ Ia is sampled, and the magnitude of voltage Uai of the current differential combination synchronization of the acquirement phase, draws A phases equipment power dissipation P in distribution boxA。
B phases equipment power dissipation and C phases equipment power dissipation are P respectively by that analogyB、PC。
The power consumption P of distribution box equipment consumptionS=PA+PB+PC
2nd, power consumption caused by the contact resistance of contact point in distribution box
As Fig. 5, the magnitude of voltage Uai, Ubi, Uci, the first via that monitoring device gathers distribution box synchronization inlet wire respectively go out
The magnitude of voltage Uao of line three-phase1、Ubo1、Uco1With the current value Iao of first via outlet three-phase1、Ibo1、Ico1。
Uai and Uao is calculated respectively1Voltage difference Δ Uai, Ubi and Ubo1Voltage difference Δ Ubi, Uci and Uco1's
Voltage difference Δ Uci.
The phase current values Iao of voltage difference Δ Uai combination synchronizations1, first via A phases are calculated and go out line current production
Raw contact resistance power consumption PA1。
Similarly, first via B phases are calculated and go out contact resistance power consumption P caused by line currentB1With first via C phases are calculated
Go out contact resistance power consumption P caused by line currentC1。
The first via goes out contact resistance power consumption P of the line current caused by distribution box1=PA1+PB1+PC1。
Second tunnel goes out contact resistance power consumption and threeth tunnel of the line current caused by distribution box and goes out line current in distribution box
Contact resistance power consumption caused by interior is P respectively by that analogy2、P3。
The contact resistance power consumption P of contact point in distribution boxJ=P1+P2+P3
3rd, the total power consumption P of distribution boxAlways=Ps+Pj
4th, P is worked asSDuring more than certain certain value, judge that the power consumption of distribution box equipment consumption is unqualified.Work as PJMore than certain certain value
When, judge that the contact resistance power consumption of contact point in distribution box is exceeded.
Claims (3)
1. the on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption, it is characterized in that, first by distribution box power consumption point
Solve power consumption caused by the contact resistance of contact point in power consumption and distribution box for the consumption of distribution box equipment.
Monitoring device is by penetrating the inlet wire of a certain phase of distribution box similar to monitoring residual current with mutually all outlets
Small current mutual inductor carries out current differential sampling, the current differential of the phase is obtained, in conjunction with the voltage of the synchronization phase inlet wire
Value, the power consumption of phase equipment consumption in distribution box is drawn, similarly measures and calculates other two-phase power consumptions, three-phase, which is added as, matches somebody with somebody
The power consumption of electric box equipment consumption.When power consumption is more than certain certain value, that is, judge that equipment power dissipation is unqualified in distribution box.
Monitoring device by gather the magnitude of voltage of a certain phase inlet wire of distribution box synchronization, the phase outlet magnitude of voltage and electric current
Value, calculates voltage difference, mutually goes out line current value in conjunction with synchronization this, draws the power consumption caused by resistance that is in contact,
Similarly measure and calculate other two-phase power consumptions, three-phase is added as in distribution box power consumption caused by the contact resistance of contact point.
When power consumption is more than certain certain value, that is, judge that distribution box contact resistance power consumption is exceeded.
Power consumption caused by the contact resistance of contact point is added as distribution box in power consumption caused by distribution box equipment and distribution box
Total power consumption.
Monitoring device has process circuit, alternating current sampling circuit, communication unit and display unit, is gathered by alternating current sampling circuit
The current value and magnitude of voltage of inlet-outlet line, while the difference to passing in and out line current is sampled.
2. a kind of on-Line Monitor Device of distribution box power consumption and its measurement determination methods, its feature exist according to claim 1
In：To ensure that the power consumption number measurement of distribution box equipment consumption is accurate, the distribution box inlet wire of monitoring device collection synchronization
Magnitude of voltage and the inlet-outlet line current differential of sampling.
3. a kind of on-Line Monitor Device of distribution box power consumption and its measurement determination methods, its feature exist according to claim 1
In：To ensure that power consumption number measurement is accurate caused by the contact resistance of contact point in distribution box, monitoring device collection synchronization
The magnitude of voltage of distribution box inlet wire, the magnitude of voltage of outlet and go out line current value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610333710.5A CN107390019A (en) | 2016-05-17 | 2016-05-17 | The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610333710.5A CN107390019A (en) | 2016-05-17 | 2016-05-17 | The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107390019A true CN107390019A (en) | 2017-11-24 |
Family
ID=60338091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610333710.5A Pending CN107390019A (en) | 2016-05-17 | 2016-05-17 | The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107390019A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194105A (en) * | 2018-08-24 | 2019-01-11 | 珠海格力电器股份有限公司 | Converter control method, device, system and current transformer |
| CN112014632A (en) * | 2020-09-08 | 2020-12-01 | 广东威爱浦实业有限公司 | Method for previously measuring and judging power consumption of distribution box |
| CN114063680A (en) * | 2021-11-24 | 2022-02-18 | 国网冀北电力有限公司公司张家口供电公司 | Distribution box environment controller based on 5G Internet of things communication technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201541098U (en) * | 2009-09-30 | 2010-08-04 | 深圳市飞霞机电技术有限公司 | Intelligent energy consumption monitoring and measuring single-phase distribution box |
| US20140236507A1 (en) * | 2013-02-20 | 2014-08-21 | Mitsubishi Electric Research Laboratories, Inc. | Method for Determining Power Consumption of Loads in Ungrounded Power Distribution Systems |
| CN104126128A (en) * | 2011-12-20 | 2014-10-29 | 施耐德电器工业公司 | Method for determining a power consumption, monitoring system and electrical installation comprising the application thereof |
| CN104569574A (en) * | 2013-10-16 | 2015-04-29 | 施耐德电器工业公司 | Method for determining an individual power consumption |
-
2016
- 2016-05-17 CN CN201610333710.5A patent/CN107390019A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201541098U (en) * | 2009-09-30 | 2010-08-04 | 深圳市飞霞机电技术有限公司 | Intelligent energy consumption monitoring and measuring single-phase distribution box |
| CN104126128A (en) * | 2011-12-20 | 2014-10-29 | 施耐德电器工业公司 | Method for determining a power consumption, monitoring system and electrical installation comprising the application thereof |
| US20140236507A1 (en) * | 2013-02-20 | 2014-08-21 | Mitsubishi Electric Research Laboratories, Inc. | Method for Determining Power Consumption of Loads in Ungrounded Power Distribution Systems |
| CN104569574A (en) * | 2013-10-16 | 2015-04-29 | 施耐德电器工业公司 | Method for determining an individual power consumption |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194105A (en) * | 2018-08-24 | 2019-01-11 | 珠海格力电器股份有限公司 | Converter control method, device, system and current transformer |
| CN109194105B (en) * | 2018-08-24 | 2020-04-14 | 珠海格力电器股份有限公司 | Converter control method, device and system and converter |
| CN112014632A (en) * | 2020-09-08 | 2020-12-01 | 广东威爱浦实业有限公司 | Method for previously measuring and judging power consumption of distribution box |
| CN114063680A (en) * | 2021-11-24 | 2022-02-18 | 国网冀北电力有限公司公司张家口供电公司 | Distribution box environment controller based on 5G Internet of things communication technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104823520B (en) | The fluorescent tube of remodeling light emitting diode | |
| CN103985617B (en) | A kind of Intelligent fuse | |
| KR20080093169A (en) | Method of leakage current break and measurement leakage current use phase calculation | |
| CN105223427B (en) | The detection method and detection device of fault electric arc | |
| CN107390019A (en) | The on-Line Monitor Device and its measurement determination methods of a kind of distribution box power consumption | |
| CN107402324B (en) | Power supply sampling circuit and method based on single current transformer and low-voltage circuit breaker thereof | |
| CN103630797B (en) | A kind of transformator turn-to-turn short circuit detection means | |
| CN106707030B (en) | Method and device for measuring ground impedance and power loss of distribution transformer | |
| CN107884645A (en) | Based on voltage ratio compared with power capacitor method for monitoring operation states | |
| WO2019206059A1 (en) | Power protection circuit breaker | |
| CN106990305A (en) | The dry-type air-core reactor on-line monitoring method of high-voltage power capacitor complexes | |
| CN204422095U (en) | Switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device and system | |
| CN201569508U (en) | Temperature rise monitoring and analyzing device of high-pressure equipment | |
| CN103616581B (en) | The method of without disconnecting power lead test reactive power compensator | |
| CN204189753U (en) | A kind of Intelligent fuse | |
| CN204101663U (en) | Lightning arrester with electrical testing meter | |
| CN204610337U (en) | A kind of fire inspection cooling blower fault pre-alarming device | |
| CN104330650A (en) | Total current based live-line test method of zinc oxide lightning arrester group | |
| CN104034977A (en) | Capacitive voltage transformer electrified detector | |
| CN204992785U (en) | Take low voltage network monitored control system of trouble early warning and diagnostic function | |
| CN103454536A (en) | Power transformer test method | |
| CN211718442U (en) | Combined fault arc detector | |
| CN106767375B (en) | Three-phase transformer winding deformation on-line monitoring method based on short circuit impedance method | |
| CN202372564U (en) | Online monitoring device of switch cabinet | |
| WO2010130275A3 (en) | Electrical power meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171124 |
|
| RJ01 | Rejection of invention patent application after publication |