CN105004915A - Standby power calculating method for power consumption equipment - Google Patents
Standby power calculating method for power consumption equipment Download PDFInfo
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- CN105004915A CN105004915A CN201510416661.7A CN201510416661A CN105004915A CN 105004915 A CN105004915 A CN 105004915A CN 201510416661 A CN201510416661 A CN 201510416661A CN 105004915 A CN105004915 A CN 105004915A
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Abstract
The invention provides a standby power calculating method for power consumption equipment, which belongs to the field of calculation. The current power of the power consumption equipment is acquired through setting a time interval, and an acquiring window period is set. When a power jump is determined, an accurate standby power is obtained through checking the power of the window period, and finally the standby power of the power consumption equipment is obtained through calculation. The standby power calculating method can satisfy a requirement for calculating the standby powers of different types of power consumption equipment, and overcomes a problem of incapability of accurately calculating the standby power because of low power factor of the power consumption equipment on the standby condition. A relatively accurate standby power can be obtained.
Description
Technical field
The present invention relates to measuring and calculating field, particularly relate to a kind of consumer standby power measuring method.
Background technology
Along with the development in epoch, in Modern Family, consumer kind gets more and more, and electricity consumption of resident is more and more higher, and a lot of user not cut off the electricity supply when not making electrical appliance custom, causes having a large amount of waiting electric quantities to be wasted every year.Many people start to pay close attention to household electrical appliance and whether there is recessive power consumption, and detecting the standby power consumption of consumer has more urgent demand.General family is all with power measuring test, but test is all current power, normally can not reflect actual result.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of consumer standby power measuring method, the survey calculation of the standby consumed power of dissimilar consumer can be met, obtain a waiting electric quantity value accurately.
In order to achieve the above object, the technical solution adopted in the present invention is: a kind of consumer standby power measuring method, specifically comprises the steps:
(1) current power value of consumer is gathered with set acquisition time interval;
The acquisition time interval of setting power harvester, in acquisition time axle, choose N number of continuous acquisition o'clock as a window phase, wherein N is positive integer; One group of performance number is comprised in a described window phase; In acquisition time axle continuous acquisition n (n be more than or equal to 3 natural number) performance number of individual window phase;
(2) judge whether the power in window phase saltus step occurs;
According to the performance number of n the window phase that step 1 obtains, the start saltus step reference value P of setting consumer
0, calculate the average power of all performance numbers in first window phase
Power saltus step in window phase comprises start power saltus step and closes acc power saltus step;
Described start power saltus step determination methods is specially:
By all performance numbers in first window phase one by one with start saltus step reference value P
0compare, if detect that the performance number in this window phase has one to exceed start saltus step reference value P
0, then illustrate that consumer is in start power transitional states;
Described pass acc power saltus step determination methods is specially:
Carry out linear fit to the often group performance number in n window phase according to formula f (x)=ax+b, wherein f (x) is Trend value, and x is time variable, and a is slope, and b is undetermined coefficient, obtains the slope often organizing performance number in each window phase; According to time shaft order, compare the slope often organizing performance number in this n window phase, if slope is continuous decrease, then illustrates that consumer is in and close acc power transitional states;
(3) performance number of window phase is checked;
If there is the saltus step of start power, then get the performance number of performance number as the home window phase of first window phase; If occur to close acc power saltus step, then get the performance number of performance number as the home window phase of the n-th window phase;
According to the performance number of the home window phase that step 2 obtains, the arithmetic mean calculating the performance number in this window phase is
Setting check baseline value σ, has one not in check scope if detected in the performance number in the home window phase
in, then the performance number in the home window phase is deleted the performance number collected at first according to acquisition time with first-in first-out order, now the home window phase is moved on a timeline backward; , the performance number that next collection point gathers was increased in the home window phase meanwhile, forms new window phase; Recalculate the arithmetic mean power of the performance number in new window phase
with new check baseline value σ ', continue the performance number in new window phase and new check scope
compare; Repeat above-mentioned check process, until the power data in window phase all drops in sensing range, thus obtain the window phase after stablizing;
(4) standby power of consumer is calculated
Obtain the window phase after stablizing according to step 3, the arithmetic mean of the performance number in the window phase after calculation stability, this arithmetic mean is the standby power value of consumer, terminates to calculate, stores this standby power value;
When saltus step occurs the power of consumer again, repeat step 1-step 4, again calculate standby power value, obtain new standby power value;
If new standby power value is larger than original standby power value stored, then abandon new standby power value, so the standby power of consumer is original standby power value stored; If new standby power value is less than the original standby power value stored, then new standby power value is covered original standby power value stored, so the standby power of consumer is new standby power value.
Further, specifically the comprising the following steps of described setting check baseline value σ:
First calculate average power reference value V, average power reference value V is determined jointly by the measuring error C of metering circuit itself and power swing ratio B, and computing formula is as follows: V=C/B;
If the arithmetic mean calculating the performance number in the home window phase is
be greater than average power reference value V, then σ equals power swing ratio B and arithmetic mean
product, namely
if the arithmetic mean calculating the performance number in the home window phase is
be less than average power reference value V, then σ is a fixed value, and its value is the measuring error C of metering circuit itself, i.e. σ=C.
Further, the start saltus step reference value P of described consumer
0for 2 times of Acquisition Circuit Acquisition Error.
Further, described power swing ratio B is 10%.
Compared with prior art, the invention has the beneficial effects as follows: the current power value being gathered consumer by setting acquisition time interval, the setting acquisition window phase, when judging power generation saltus step, obtaining standby power accurately by carrying out check to the power of window phase, finally calculating the standby power of consumer.Technique scheme, can be satisfied with the survey calculation of the standby consumed power of dissimilar consumer, and overcome consumer because power factor is low under waiting condition, the problem that cannot accurately calculate, can obtain a standby power value more accurately.
Accompanying drawing explanation
Fig. 1 is the standby power measuring method process flow diagram of a kind of consumer that the invention provides embodiment 1;
Fig. 2 is the changed power curve synoptic diagram that the air-conditioning that the invention provides embodiment 1 is energized to start;
Fig. 3 is the standby power measuring method process flow diagram of the another kind of consumer that the invention provides embodiment 2;
Changed power curve synoptic diagram when Fig. 4 is the air-conditioning shutdown that the invention provides embodiment 2.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, be the process flow diagram of the standby power measuring method of a kind of consumer of invention, concrete following steps:
(1) current power value of consumer is gathered with set acquisition time interval
The present embodiment, will do related description using air-conditioning as typical consumer, as shown in Figure 2, be the changed power curve map that an air-conditioning is energized to start.
Gathered the current power value of air-conditioning with set acquisition time interval by power collecting device, acquisition time interval can artificially set, such as, can be 0.1s, 0.05s, but interval is less, the numerical value finally calculated is more accurate, and the present embodiment 1 is for 0.1s.
10 continuous acquisition are chosen o'clock as an acquisition window phase in acquisition time axle, the performance number collected is put into window phase array, suppose in current window phase, to contain one group of power data, sort according to time shaft order, numerical value is: 4.0W, 4.2W, 5.0W, 6.1W, 6.6W, 6.7W, 6.8W, 6.9W, 6.9W, 6.9W, calculate the arithmetic mean P of current window phase performance number, obtaining average power is
(2) setting start saltus step reference value
According to the self performance of harvester and the Acquisition Error of Acquisition Circuit, arrange 2 times that start saltus step reference value is the Acquisition Error of Acquisition Circuit.Such as metering circuit itself has the measuring error of 0.5W, start saltus step reference value can be set to 1W according to error range.
(3) performance number in window phase and start saltus step reference value are compared
If a certain performance number in window phase exceedes start saltus step reference value, judge that consumer starts saltus step occurs.Performance number in window phase and start saltus step reference value are compared, in window phase, first performance number 4.0W has exceeded start saltus step reference value 1W, judges that air-conditioning there occurs saltus step, starts to measure standby power.
(4) power of window phase is checked
First calculate average power reference value V, average power reference value V is determined jointly by the measuring error C of metering circuit itself and the fluctuation ratio B of power, and computing formula is as follows: V=C/B;
Described power swing ratio B is the scope allowing power normal fluctuation; It is less that power swing ratio B is arranged, and the standby power obtained is more accurate, but the time finally obtained required for stabilization result is longer, and ratio establish too small, possibly cannot obtain final standby power consumption value;
If the arithmetic mean calculating the performance number in the home window phase is
be greater than average power reference value V, then σ equals power swing ratio B and arithmetic mean
product, namely
if the arithmetic mean calculating the performance number in the home window phase is
be less than average power reference value V, then σ is a fixed value, and its value is the measuring error C of metering circuit itself, i.e. σ=C; Result of calculation can be allowed more accurate by such setting.
In embodiment 1, the error C of metering circuit itself is 0.5W, and simultaneously according to actual measurement, when air-conditioning is in steady state (SS), power has and fluctuates up and down.In actual application, when fluctuation ratio value B is taken as 10%, in the short period of time, stable standby power can be obtained.Average power reference value V is obtained for 0.5/10%=5W with this.
And obtain when average power is 6W in step 1, exceed average power reference value 5W, the value now setting check baseline value σ is the product of fluctuation ratio value B and average power, i.e. 10%*6W=0.6W, that is when the power data in window phase is all in check scope
for in 5.4W ~ 6.6W time, then think that power data is stablized.Power data interim for current window and check scope are compared, first data 4.0W detected not in check scope 5.4W ~ 6.6W, now window phase is moved on a timeline backward, abandon these data of 4.0W, the power data 6.9W that next collection point collects is increased in window phase array simultaneously, and the average power recalculated in this window phase and new check baseline value, continue performance number and new check scope to compare.
When numerical value in window phase is: when 4.2W, 5.0W, 6.1W, 6.6W, 6.7W, 6.8W, 6.9W, 6.9W, 6.9W, 6.9W, calculating average power is 6.3W, the interim check scope of new window is 5.7W ~ 6.9W, power data interim for new window and check scope are compared, detect that first data 4.2W be not in the scope of 5.7W ~ 6.9W, continue window phase to move on a timeline backward, abandon these data of 4.2W, again the power data that next collection point collects is increased in window array simultaneously.
Repeat above-mentioned steps, until the power data in window phase all drops within the scope of check.
(5) standby power of consumer is calculated
After by the check in step 4, if all power datas all drop in a window phase
time within the scope of check, then think that now power is stablized; Calculate the average power of this window phase internal power, now the average power of mouth phase internal power is the standby power value of this consumer, stores standby power data.
Such as after the check afterwards of step 4, power data in window phase becomes: 6.6W, 6.7W, 6.8W, 6.9W, 6.9W, 6.9W, 7.0W, 6.9W, 7.0W, 7.0W, now average power is 6.9W, check scope is 6.2W ~ 7.6W, all data all drop within the scope of this, average power 6.9W is now current standby power value, stores standby power value.
Embodiment 2
As shown in Figure 3, be the standby power measuring method process flow diagram of another kind of consumer of the present invention, specifically comprise the following steps:
(1) gather the current power value of consumer with set acquisition time interval, get continuously in acquisition time axle n (n be more than or equal to 3 natural number) individual window time value, in the present embodiment 2, n gets 3;
The present embodiment 2 as shown in Figure 4, is that an air-conditioning is from running to standby changed power curve map.
Gathered the current power value of air-conditioning with the acquisition interval of setting by power collecting device, acquisition time interval can artificially set, and can be such as 0.1s, 0.05s, but interval is less, the numerical value finally calculated be more accurate, and the present embodiment 2 is for 0.1s.
In acquisition time axle, choose 10 continuous acquisition o'clock as an acquisition window phase, continuous acquisition 3 window phases, are respectively window phase 31, window phase 32, window phase 33, the power data collected are put into this 3 window phase arrays.
Contain one group of power data respectively in 3 current window phases, according to the sequence of time shaft order, in window phase 31, data have been: 12.0W, 12.1W, 12.2W, 12.0W, 11.9W, 12.2W, 12.2W, 12.1W, 11.9W, 11.0W; In window phase 32, data are: 12.1W, 12.2W, 12.0W, 11.9W, 12.2W, 12.2W, 12.1W, 11.9W, 11.0W, 8.0W; In window phase 33, data are: 12.2W, 12.0W, 11.9W, 12.2W, 12.2W, 12.1W, 11.9W, 11.0W, 8.0W, 7.0W; Calculate the arithmetic mean of 3 window phase power datas respectively, obtain window phase 31, window phase 32, window phase 33 average power be respectively 11.96W, 11.56W, 11.05W.
(2) regretional analysis is carried out to group performance number of in each window phase, according to analysis result, judge whether consumer saltus step occurs, if there is saltus step, start to measure standby power
Judge according to changed power, data fit trends of straight line equation in window phase, according to formula f (x)=ax+b, linear regression fit is carried out to the data in window phase 31, window phase 32, window phase 33, f (x) is Trend value, x is time variable, and a is slope, and b is undetermined coefficient.Obtain respectively window phase 31, window phase 32, window phase 33 fitting result be respectively:
f(x)
31＝-0.0606x+12.293；f(x)
32＝-0.2739x+13.067；f(x)
33＝-0.4867x+13.727
According to fitting result, the slope of window phase 31, window phase 32, window phase 33 is-0.0606 ,-0.2739 ,-0.4867 respectively, and slope represents the variation tendency of data.
To obtain contrasting respectively before and after 3 slope datas, can show that slope is continuing to diminish, power continuous decrease, and therefore judge that consumer sends saltus step, start to measure standby power.
(3) power of window phase is checked
In 3 window phases, get the data of last window phase 33 as the raw data of checking.
In window phase 33, the average power of one group of power data is 11.05W, exceed average power reference value 5W, the value now setting check baseline value σ is the product of fluctuation ratio value B and average power, i.e. 10%*11.05W=1.105W, namely when the power data in window phase is all when checking scope 9.95W ~ 12.16W, then think that this power data is stablized.Power data interim for current window and check scope are compared, detect that first data 12.2W be not in the scope of 9.95W ~ 12.16W, now window phase is moved on a timeline backward, abandon these data of 12.2W, the power data 6.9W that next collection point collects is increased in window array simultaneously, and recalculate average power and check baseline value, continue power data and check scope to compare.
(4) standby power of consumer is calculated
By step 3, time shaft arrives window phase 34, power data in window phase becomes: 6.0W, 5.8W, 6.0W, 5.8W, 6.5W, 6.2W, 5.6W, 6.2W, 6.1W, 6.3W, average power 6.05W now, the check scope of new window phase is 5.5W ~ 6.7W, all data all drop within the scope of this, average power 6.05W be now newly calculate standby power value.
(5) the standby power value newly obtained and the original standby power value stored are compared
If the standby power value newly obtained is less than original standby power value stored, then forward step 6 to; If the standby power value newly obtained is larger than the original standby power value stored, then forward step 7 to;
(6) original standby power value stored is covered by the standby power value newly obtained
The standby power value 6.05W newly obtained and the original standby power value 6.9W stored is compared, find that the standby power value that newly obtains is less than original, the standby power value 6.05W newly obtained is covered the original standby power value stored, and the standby power value of current air-conditioning is 6.05W.
(7) the standby power value newly obtained is abandoned
Above-described embodiment for the invention will be further described, but does not limit the invention to these embodiments.One skilled in the art would recognize that all alternativess, improvement project and the equivalents that present invention encompasses and may comprise in Claims scope.
Claims (4)
1. a consumer standby power measuring method, is characterized in that, comprises following steps:
(1) current power value of consumer is gathered with set acquisition time interval;
The acquisition time interval of setting power harvester, in acquisition time axle, choose N number of continuous acquisition o'clock as a window phase, wherein N is positive integer; One group of performance number is comprised in a described window phase; In acquisition time axle continuous acquisition n (n be more than or equal to 3 natural number) performance number of individual window phase;
(2) judge whether the power in window phase saltus step occurs;
According to the performance number of n the window phase that step 1 obtains, the start saltus step reference value P of setting consumer
0, calculate the average power of all performance numbers in first window phase
Power saltus step in window phase comprises start power saltus step and closes acc power saltus step;
Described start power saltus step determination methods is specially:
By all performance numbers in first window phase one by one with start saltus step reference value P
0compare, if detect that the performance number in this window phase has one to exceed start saltus step reference value P
0, then illustrate that consumer is in start power transitional states;
Described pass acc power saltus step determination methods is specially:
Carry out linear fit to the often group performance number in n window phase according to formula f (x)=ax+b, wherein f (x) is Trend value, and x is time variable, and a is slope, and b is undetermined coefficient, obtains the slope often organizing performance number in each window phase; According to time shaft order, compare the slope often organizing performance number in this n window phase, if slope is continuous decrease, then illustrates that consumer is in and close acc power transitional states;
(3) performance number of window phase is checked;
If there is the saltus step of start power, then get the performance number of performance number as the home window phase of first window phase; If occur to close acc power saltus step, then get the performance number of performance number as the home window phase of the n-th window phase;
According to the performance number of the home window phase that step 2 obtains, the arithmetic mean calculating the performance number in this window phase is
Setting check baseline value σ, has one not in check scope if detected in the performance number in the home window phase
in, then the performance number in the home window phase is deleted the performance number collected at first according to acquisition time with first-in first-out order, now the home window phase is moved on a timeline backward; , the performance number that next collection point gathers was increased in the home window phase meanwhile, forms new window phase; Recalculate the arithmetic mean power of the performance number in new window phase
with new check baseline value σ ', continue the performance number in new window phase and new check scope
compare; Repeat above-mentioned check process, until the power data in window phase all drops in sensing range, thus obtain the window phase after stablizing;
(4) standby power of consumer is calculated
Obtain the window phase after stablizing according to step 3, the arithmetic mean of the performance number in the window phase after calculation stability, this arithmetic mean is the standby power value of consumer, terminates to calculate, stores this standby power value;
When saltus step occurs the power of consumer again, repeat step 1-step 4, again calculate standby power value, obtain new standby power value;
If new standby power value is larger than original standby power value stored, then abandon new standby power value, so the standby power of consumer is original standby power value stored; If new standby power value is less than the original standby power value stored, then new standby power value is covered original standby power value stored, so the standby power of consumer is new standby power value.
2. a kind of consumer standby power measuring method according to claim 1, it is characterized in that, described setting check baseline value σ specifically comprises the following steps:
First calculate average power reference value V, average power reference value V is determined jointly by the measuring error C of metering circuit itself and power swing ratio B, and computing formula is as follows: V=C/B;
If the arithmetic mean calculating the performance number in the home window phase is
be greater than average power reference value V, then σ equals power swing ratio B and arithmetic mean
product, namely
if the arithmetic mean calculating the performance number in the home window phase is
be less than average power reference value V, then σ is a fixed value, and its value is the measuring error C of metering circuit itself, i.e. σ=C.
3. a kind of consumer standby power measuring method according to claim 1, is characterized in that, the start saltus step reference value P of described consumer
0for 2 times of Acquisition Circuit Acquisition Error.
4. a kind of consumer standby power measuring method according to claim 2, it is characterized in that, described power swing ratio B is generally 10%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110376429A (en) * | 2019-06-06 | 2019-10-25 | 国网浙江省电力有限公司 | A method of identification household electrical appliance use state |
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| EP2911273A1 (en) * | 2012-10-19 | 2015-08-26 | Panasonic Intellectual Property Management Co., Ltd. | Stand-by power estimation device, program |
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| JP2011169703A (en) * | 2010-02-17 | 2011-09-01 | Hioki Ee Corp | Wattmeter |
| CN201622304U (en) * | 2010-04-07 | 2010-11-03 | 武汉神华节能科技发展有限公司 | Standby energy consumption test instrument |
| CN201819343U (en) * | 2010-08-31 | 2011-05-04 | 四川长虹空调有限公司 | Air conditioner with standby power detection and display functions |
| EP2911273A1 (en) * | 2012-10-19 | 2015-08-26 | Panasonic Intellectual Property Management Co., Ltd. | Stand-by power estimation device, program |
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| Publication number | Priority date | Publication date | Assignee | Title |
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