CN108562792A - A kind of electricity metering separate method based on the fusion of a variety of Current Waveform Characteristics - Google Patents
A kind of electricity metering separate method based on the fusion of a variety of Current Waveform Characteristics Download PDFInfo
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- CN108562792A CN108562792A CN201711364769.1A CN201711364769A CN108562792A CN 108562792 A CN108562792 A CN 108562792A CN 201711364769 A CN201711364769 A CN 201711364769A CN 108562792 A CN108562792 A CN 108562792A
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- current waveform
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/08—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using analogue techniques
Abstract
The invention discloses a kind of electricity metering separate methods based on the fusion of a variety of Current Waveform Characteristics, are related to electrical energy measurement field, include the following steps：（1）Data acquisition module initialization block calculates and records the value of three kinds of features；（2）Judge whether execute step inside load according to the difference of current waveform virtual value before and after mutation（3）；（3）If the difference of the front and back current waveform virtual value of mutation is more than 0, then follow the steps（4）；If being less than 0, signal, return to step are exited（2）；（4）The difference for calculating the value for three kinds of front and back features of current signal mutation that electrical equipment generates, executes step（5）；（5）Electrical equipment type identification is completed according to actual measurement load characteristic vector, electrical equipment type and energy consumption accumulated result are associated, return to step（2）.The present invention can realize utilities building electricity metering separate without carrying out track remodelling using less measurement meter, be suitble to promote and apply.
Description
Technical field
The present invention relates to electrical energy measurement field more particularly to a kind of electricity subitems based on the fusion of a variety of Current Waveform Characteristics
Metering method.
Background technology
According to statistical data in 2011, China's utilities building accounted for about the 5% of cities and towns civil buildings area, and electricity consumption accounts for about
Building electric consumption 25%, large-scale public building year power consumption account for about the 22% of national cities and towns total power consumption, every square metre of year power consumption
Amount is 10~20 times of ordinarily resident's house.In recent years, large-scale public with the quickening of China's expanding economy and urbanization process
Area with building is being skyrocketed through, and the large-scale public building of high energy consumption index accounts for the ratio of the town building gross area also increasingly
Greatly, and class is higher and higher, such as a large amount of high-grade culture facility and high-grade means of transportation etc., this causes building electric consumption
Growth rate of the growth rate higher than building total amount.Therefore, reducing large-scale public building electricity consumption by energy management has
Very important meaning.
Record and statistics large-scale public building total energy consumption are the basic demands of energy management, but this aggregate data is only capable of
The overview for understanding building energy, is difficult to be judged or summarized conclusion accordingly.And by implementing electricity subentry measurement foundation
Electricity consumption quantization management system is the basic effective way for solving described problem.
Currently, large-scale public building electricity consumption metering separate system is all made of multilist scheme, ultimate scheme is for each electric appliance
Equipment installs special metering ammeter additional.Obviously, this scheme needs more measurement meter, to which system cost is higher, in addition,
Certain positions for being inconvenient to install meter either need the electric load internal sorting for carrying out track remodelling or obtaining inadequate
It is careful.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of electricity subitem meter merged based on a variety of Current Waveform Characteristics
Amount method.
The present invention is to solve above-mentioned technical problem by the following technical solutions：One kind is special based on a variety of current waveforms
The electricity metering separate method for levying fusion, includes the following steps：
(1) data acquisition module initialization block；Load total current waveform data at this time are measured, simultaneously record current waveform is calculated
After virtual value, current waveform rectification after mean value and current waveform rectification these three features of maximum value value；
(2) load total current sign mutation is waited for, if mutating, according to the difference of current waveform virtual value before and after mutation
To judge whether there is the operating status of electrical equipment to change inside load；If the difference of the front and back current waveform virtual value of mutation
Absolute value be more than threshold value δ, then the operating status of certain electrical equipment is changed inside load, executes step (3), otherwise
Person continues waiting for；
(3) it if the difference of the front and back current waveform virtual value of mutation is more than 0, thens follow the steps (4)；If the mutation of subsequent detection
The difference of front and back current waveform virtual value is less than 0, then exits signal, return to step (2)；
(4) difference of the value of three kinds of features before and after calculated load total current sign mutation executes step (5)；
(5) actual measurement load characteristic vector is calculated, electrical equipment type identification is completed according to actual measurement load characteristic vector, it will be electric
Device device type and energy consumption accumulated result are associated, return to step (2).
Further, after the step (3) exits signal, the difference of current waveform virtual value before and after connected mutation is calculated
Corresponding threshold values δ, if 0.9 ＜ δ ＜ 1.1, corresponding difference is that the input of same electrical equipment is corresponding with when exiting respectively
The difference of the front and back current waveform virtual value of mutation, the energy expenditure for stopping corresponding electrical equipment is accumulative, return to step (2).
Further, the threshold values, which is adopted, is represented by the following formula：
δ=| Δ IRms, 1/ΔIR, s, 2|
δ is threshold values, Δ I in formulaRms, 1With Δ IRms, 2It is the input electric current corresponding with when exiting of same electrical equipment respectively
The difference of waveform virtual value.
Further, the step (5) is identified electrical equipment type using closest template matching method.
Further, the calculating actual measurement load characteristic vector in the step (5), which is adopted, is represented by the following formula：
Ls is actual measurement load characteristic vector, Δ I in formulaRms, 1For the difference of current waveform virtual value before and after mutation, Δ IAvg, 1
For the difference of mean value after current waveform rectification before and after mutation, Δ IMax, 1For the difference of maximum value after current waveform rectification before and after mutation
Value.
Compared with prior art, a kind of electricity based on the fusion of a variety of Current Waveform Characteristics provided by the present invention, which is itemized, counts
Amount method carries out Classification and Identification, then by acquiring and analyzing total current waveform feature to the electrical equipment inside electric load
The electricity that each electrical equipment is consumed is estimated respectively.The present invention uses less measurement meter without carrying out track remodelling
It can realize utilities building electricity metering separate, be suitble to promote and apply.
Description of the drawings
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical scheme of the present invention
It is briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the present of invention, general for this field
For logical technical staff, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structural representation of the electricity metering separate method merged based on a variety of Current Waveform Characteristics of the present invention
Figure.
Specific implementation mode
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the present invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work,
It shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of electricity metering separate side based on the fusion of a variety of Current Waveform Characteristics provided by the present invention
Method includes the following steps：
(1) data acquisition module initialization block；Load total current waveform data at this time are measured, simultaneously record current waveform is calculated
After virtual value, current waveform rectification after mean value and current waveform rectification these three features of maximum value value；
(2) load total current sign mutation is waited for, if mutating, according to the difference of current waveform virtual value before and after mutation
To judge whether there is the operating status of electrical equipment to change inside load；If the difference of the front and back current waveform virtual value of mutation
Absolute value be more than threshold value δ, then the operating status of certain electrical equipment is changed inside load, executes step (3), otherwise
Person continues waiting for；
(3) it if the difference of the front and back current waveform virtual value of mutation is more than 0, thens follow the steps (4)；If the mutation of subsequent detection
The difference of front and back current waveform virtual value is less than 0, then exits signal, return to step (2)；
(4) difference of the value of three kinds of features before and after calculated load total current sign mutation executes step (5)；
(5) actual measurement load characteristic vector is calculated, electrical equipment type identification is completed according to actual measurement load characteristic vector, it will be electric
Device device type and energy consumption accumulated result are associated, return to step (2).
After step (3) exits signal, the corresponding threshold values δ of difference of current waveform virtual value before and after connected mutation is calculated,
If 0.9 ＜ δ ＜ 1.1, corresponding difference be respectively same electrical equipment input mutation corresponding with when exiting before and after electric current
The difference of waveform virtual value, the energy expenditure for stopping corresponding electrical equipment is accumulative, return to step (2).
Threshold values, which is adopted, to be represented by the following formula：δ=| Δ IRms, 1/ΔIRms, 2|, δ is threshold values, Δ I in formulaRms, 1With Δ IRms, 2Respectively
It is the difference of the input current waveform virtual value corresponding with when exiting of same electrical equipment.
Step (5) is identified electrical equipment type using closest template matching method.
Calculating actual measurement load characteristic vector in step (5), which is adopted, to be represented by the following formula：
Ls is actual measurement load characteristic vector, Δ in formulaRms, 1For the difference of current waveform virtual value before and after mutation, Δ IAvg, 1
For the difference of mean value after current waveform rectification before and after mutation, Δ IMax, 1For the difference of maximum value after current waveform rectification before and after mutation
Value.
Embodiment 1
By taking a certain staff quarters of certain state-owned enterprise as an example, in the dormitory containing electric light, air-conditioning, water dispenser and refrigerator these four
Equipment.Measurement equipment is installed in room end of incoming cables, the present invention judges electric appliance inside room by monitoring end of incoming cables curent change
The operating status of equipment changes and carries out adding up respective power consumption.
According to the brass tacks that different type electrical equipment operation principle is different and makes its operating current waveform different, profit
With current waveform virtual value, the value of these three features of maximum value comes area after mean value and current waveform rectification after current waveform rectification
Divide different types of electrical equipment.With in experimental situation, current waveform virtual value IrmsWith mean value I after current waveform rectificationavg's
For ratio k, air-conditioning k=1.61, water dispenser k=1.05, electric light k=2.15, refrigerator k=1.31.It can be found that inhomogeneity
Type electrical equipment has significant difference on characteristic type.
Specific implementation step is as follows：
(1) before contained all electrical equipments are opened in environment to be monitored, data acquisition module is initialized, that is, empties number
According to acquisition module, original loads total current waveform data at this time are measured, and current waveform virtual value is recorded by calculating
Irms, mean value I after current waveform rectificationavgWith maximum value I after current waveform rectificationmaxThe value of these three features；
(2) mutation of load total current signal, i.e. electrical equipment is waited for put into and generate corresponding current signal when exiting
Variation, if mutate, according to the difference DELTA I of current waveform virtual value before and after mutationRms, 1To judge whether have inside load
The operating status of electrical equipment changes, if | Δ IRms, 1| big Mr. Yu threshold value δ, the then operation of certain electrical equipment of load inside
State is changed, and step (3) is executed, and no person continues waiting for；According to application scenarios difference, δ generally takes 0.2~1, here work(
The power of the electrical equipment refrigerator of rate minimum is 65W, so taking δ=0.25；
(3) according to Δ IRms, 1Size judge the operating status of electrical equipment inside load, if the front and back current waveform of mutation
The difference DELTA I of virtual valueRms, 1＞ 0, then affiliated current changing signal is the input signal of electrical equipment, then starts to add up the electric appliance
The energy expenditure of equipment executes step (4)；If the difference DELTA I of current waveform virtual value before and after the mutation of subsequent detectionRms, 2＜ 0,
Then shown current changing signal exits signal for electrical equipment；
Threshold values, which is adopted, to be represented by the following formula：δ=| Δ IRms, 1/ΔIRms, 2|, δ is threshold values, Δ I in formulaRms, 1With Δ IRms, 2Respectively
It is the difference of the input current waveform virtual value corresponding with when exiting of same electrical equipment；If 0.9 ＜ δ ＜ 1.1, judge Δ
IRms, 1With Δ IRms, 2Be respectively same electrical equipment input mutation corresponding with when exiting before and after current wave virtual value difference
Value, the energy expenditure for stopping corresponding electrical equipment accordingly is accumulative, return to step (2)；
(4) after the current waveform virtual value of front and back current signal, current waveform rectification occurring according to current signal mutation
Maximum value after mean value and current waveform rectification, the difference of the value of three kinds of features before and after calculated load total current sign mutation,
It is the difference DELTA I of the front and back current waveform virtual value of mutation respectivelyRms, 1, after the front and back current waveform rectification of mutation mean value difference DELTA
IAvg, 1, after the front and back current waveform rectification of mutation maximum value difference DELTA IMax, 1, execute step (5)；
(5) actual measurement load characteristic vector is calculated, actual measurement load characteristic is obtained according to the value of three kinds of front and back features of mutation
Vector, actual measurement load characteristic vector, which is adopted, to be represented by the following formula：
Ls is actual measurement load characteristic vector, Δ I in formulaRms, 1For the difference of current waveform virtual value before and after mutation, Δ IAvg, 1
For the difference of mean value after current waveform rectification before and after mutation, Δ IMax, 1For the difference of maximum value after current waveform rectification before and after mutation
Value；
Using closest template matching method, it is established in advance comprising all target electric appliance device types about institute
In the load profile library for belonging to load characteristic vector, find and the actual measurement most similar load characteristic Vector Mode of load characteristic vector
Electrical equipment type and energy consumption accumulated result are associated by plate accordingly to complete the identification to the input electrical equipment, return
Step (2).
According to above step, electricity metering separate result in one week is counted, following table result is obtained：
From the results of view, compared with other prior arts, the present invention can not only detect that power is larger (being more than 300W)
Electric appliance, additionally it is possible to the electric appliance of small-power (be not more than 300W) is captured with higher accuracy, in addition, because its operating status by
Such environmental effects are larger, and air conditioner load is all difficult point all the time in non-intrusion type electricity subentry measurement, and the present invention couple
The detection accuracy of air-conditioning is still good.
Above disclosed is only the specific implementation mode of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or modification,
It is covered by the protection scope of the present invention.
Claims (5)
1. a kind of electricity metering separate method based on the fusion of a variety of Current Waveform Characteristics, it is characterised in that：Include the following steps：
(1) data acquisition module initialization block；Load total current waveform data at this time are measured, calculates and record current waveform is effective
Value, after current waveform rectification after mean value and current waveform rectification these three features of maximum value value；
(2) load total current sign mutation is waited for, if mutating, is sentenced according to the difference of current waveform virtual value before and after mutation
Whether there is the operating status of electrical equipment to change inside disconnected load；If the difference of the front and back current waveform virtual value of mutation is exhausted
Threshold value δ is more than to value, then the operating status of certain electrical equipment is changed inside load, executes step (3), otherwise after
It is continuous to wait for；
(3) it if the difference of the front and back current waveform virtual value of mutation is more than 0, thens follow the steps (4)；If before and after the mutation of subsequent detection
The difference of current waveform virtual value is less than 0, then exits signal, return to step (2)；
(4) difference of the value of three kinds of features before and after calculated load total current sign mutation executes step (5)；
(5) actual measurement load characteristic vector is calculated, electrical equipment type identification is completed according to actual measurement load characteristic vector, electric appliance is set
Standby type and energy consumption accumulated result are associated, return to step (2).
2. the electricity metering separate method according to claim 1 based on the fusion of a variety of Current Waveform Characteristics, feature exist
In：After the step (3) exits signal, the corresponding threshold values δ of difference of current waveform virtual value before and after connected mutation is calculated, if
0.9 ＜ δ ＜ 1.1, then corresponding difference be respectively same electrical equipment input mutation corresponding with when exiting before and after current wave
The difference of shape virtual value, the energy expenditure for stopping corresponding electrical equipment is accumulative, return to step (2).
3. the electricity metering separate method according to claim 1 based on the fusion of a variety of Current Waveform Characteristics, feature exist
In：The threshold values, which is adopted, to be represented by the following formula：
δ=| Δ IRms, 1/ΔIRms, 2|
δ is threshold values, Δ I in formulaRms, 1With Δ IRms, 2It is the input current waveform corresponding with when exiting of same electrical equipment respectively
The difference of virtual value.
4. the electricity metering separate method according to claim 1 based on the fusion of a variety of Current Waveform Characteristics, feature exist
In：The step (5) is identified electrical equipment type using closest template matching method.
5. the electricity metering separate method according to claim 1 based on the fusion of a variety of Current Waveform Characteristics, feature exist
In：Calculating actual measurement load characteristic vector in the step (5), which is adopted, to be represented by the following formula：
Ls is actual measurement load characteristic vector, Δ I in formulaRms, 1For the difference of current waveform virtual value before and after mutation, Δ IAvg, 1It is prominent
The difference of mean value, Δ I after the front and back current waveform rectification of changeMax, 1For the difference of maximum value after current waveform rectification before and after mutation.
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| CN103308762A (en) * | 2013-06-01 | 2013-09-18 | 张晓华 | Intensive energy consumption subentry measurement warning system and implementation method |
| CN103472297A (en) * | 2013-09-15 | 2013-12-25 | 珠海派诺科技股份有限公司 | Electricity subentry measurement method |
| CN103487644A (en) * | 2013-09-09 | 2014-01-01 | 北京博锐尚格节能技术有限公司 | Electric energy subentry energy consumption metering method and device |
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2017
- 2017-12-18 CN CN201711364769.1A patent/CN108562792A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221637A (en) * | 2011-04-02 | 2011-10-19 | 珠海市鸿瑞软件技术有限公司 | Building energy consumption monitoring system |
| CN102879635A (en) * | 2012-09-19 | 2013-01-16 | 唐华 | Energy consumption monitoring, subentry measuring and analysis warning system |
| CN102967758A (en) * | 2012-12-07 | 2013-03-13 | 珠海派诺科技股份有限公司 | Separating method for indirect subentry measurement of building energy consumption |
| CN103308762A (en) * | 2013-06-01 | 2013-09-18 | 张晓华 | Intensive energy consumption subentry measurement warning system and implementation method |
| CN103487644A (en) * | 2013-09-09 | 2014-01-01 | 北京博锐尚格节能技术有限公司 | Electric energy subentry energy consumption metering method and device |
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Application publication date: 20180921 |