CN110488217A - A kind of mutual detecting method of multilist of electric energy meter measuring accuracy - Google Patents
A kind of mutual detecting method of multilist of electric energy meter measuring accuracy Download PDFInfo
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- CN110488217A CN110488217A CN201910783624.8A CN201910783624A CN110488217A CN 110488217 A CN110488217 A CN 110488217A CN 201910783624 A CN201910783624 A CN 201910783624A CN 110488217 A CN110488217 A CN 110488217A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
A kind of mutual detecting method of multilist of electric energy meter measuring accuracy, it will be in the load current Ii feedback to the zero curve of next electric energy meter of this table, then there are increments on the zero curve of next electric energy meter, pass through the increment and feedback ratio, the load current Ij of this table can be measured by next electric energy meter, the two current values are theoretically identical, but it is constantly present deviation E, if the metering of a certain electric energy meter there is a problem, when being amplified m times of (or reducing) in sometime its measured value, it can be easy to release the average current value of its own measurement and m times of (or diminution) can be all amplified by the average current value of its upper electric energy meter monitored.The present invention is mutually monitored by electric energy meter in operating status, and real-time with higher can quickly position bug list, reduces metering loss or dispute, and only need to increase several current transformers, cost is relatively low.
Description
Technical field
The present invention relates to a kind of detection methods of the measuring accuracy of electric energy meter.
Background technique
Electric energy meter is a kind of metering product, although all having done sternly in the production of producer, the examination of Utilities Electric Co. etc. link
The measuring accuracies of lattice is managed, still, for whether there is measuring accuracy in the process of running certain section of time over range the case where
It can not judge.When user has metering misalignment query, Utilities Electric Co. needs to be detected to scene, and one side on-site test must
It is detected in the case of must not powering off, because if be that electric energy meter embedded software executive problem powers on and will lead to failure reset and disappear again
It loses；On the other hand there is also detection when may electrical energy meter fault it is recovered, the testing result of two kinds of situations can be all judged
It is without exception for electric energy meter, truth cannot be reacted.Therefore, it if being able to achieve running measuring accuracy monitoring, is transported to improving
The service of inspection is very valuable work.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the present invention provides a kind of one for realizing measuring accuracy in operation and monitoring
The mutual detecting method of measuring accuracy multilist of kind electric energy meter.
The present invention is achieved through the following technical solutions:
A kind of mutual detecting method of multilist of electric energy meter measuring accuracy, it is characterised in that: include the following steps, (1) is arranged three or three
For electric energy meter more than a as mutually inspection grouping, each electric energy meter measures the load current Ii of this table, and the load of this table is electric
Stream is fed back on the zero curve of next electric energy meter, has the neutral line current of next electric energy meter proportional to the load current of this table
Increment, calculate the load current Ij that next electric energy meter measures this table using the increment；
(2) the average current value Ai and next electricity that each this table of electric energy meter measures are acquired according to cycle T by acquisition terminal
Energy table measures the average current value Aj of this table, and saves, and two groups of average current values of same period are obtained in acquisition terminal
Set S=Ai1, Ai2 ..., Ain } and T=Aj1, Aj2 ..., and Ajn }, wherein n is the number of electric energy meter, and S is electricity
The average current value set of energy Biao Benbiao measurement, T is the average current value set of this table measured by next electric energy meter；
(3) acquisition terminal can calculate each this table of electric energy meter detected current value and next electric energy according to the corresponding relationship of monitoring
The monitoring deviation of table detected current value is denoted as W={ E1, E2 ..., En }；
(4) assume that Aik is the average current value that electric energy meter K is measured, Ajk is being averaged by the next table K+1 table K measured
Current value can determine that a certain piece of table is asked in the presence of metering in wherein table K, table K+1 if the deviation Ek of two values is more than threshold value E0
Topic；
(5) Aj(k-1) be the table K-1 that table K is measured average current value, Ai(k-1) be the average electricity that table K-1 is measured oneself
Flow valuve, if the deviation E(k-1 of two values) also above threshold value E0, it can determine that wherein there are measurement problems by table K.
Preferably, in step (1), the firewire outlet of this table is parallel to by the current transformer that no-load voltage ratio is K next
On the zero curve of a electric energy meter.
Preferably, the load of the last one electric energy meter is parallel to first electric energy by current transformer in step (1)
On the zero curve of table, make the neutral line current of first electric energy meter that there is the increasing proportional to the load current of the last one electric energy meter
Amount, the load current of last electric energy meter is calculated using the increment.
Preferably, the neutral line current increment of next electric energy meter is that its neutral line current subtracts firewire electric current in step (1),
By the increment again divided by the no-load voltage ratio K of current transformer, the load current of this table measured by next electric energy meter can be calculated.
By in the load current Ii feedback to the zero curve of next electric energy meter of this table, then deposited on the zero curve of next electric energy meter
The load current Ij of this table, the two electric currents can be measured by next electric energy meter by the increment and feedback ratio in increment
Value is theoretically identical, but is constantly present deviation E, if the metering of a certain electric energy meter there is a problem, i.e., in certain a period of time
Between its measured value when being amplified m times of (or reduce), can be easy to release the average current value of its own measurement and be monitored by it
The average current value of a upper electric energy meter can all be amplified m times of (or reduce), then the electric current of itself monitoring and next electric energy meter prison
The current value that deviation Ex between the electric current of survey, the upper electric energy meter current monitored by it and a upper electric energy meter oneself monitor it is inclined
Poor Ey can be amplified m-1 times of (or diminution).A threshold value E0 is set, when two deviations are above threshold value, then the electric energy meter
Metering there is a problem.
This kind of mode, power meter group will at least be arranged three, when only there are two when, can not judge it is specific which be to measure
Show problem, only when three or three or more, when being related to the data that the table measures and all there are problems that measurement deviation, and its
When his table is normal, then can be concluded that it is that the table measurement problem occurs.
The beneficial effects of the present invention are: the present invention is mutually monitored by electric energy meter in operating status, is had higher
Real-time, bug list can quickly be positioned, reduce metering loss or dispute, and only need to increase several electric currents mutual
Sensor, cost is relatively low.
Specific embodiment
Invention is described in further detail below by specific embodiment.
Embodiment one: a kind of mutual detecting method of multilist of electric energy meter measuring accuracy includes the following steps, (1) be arranged three or
For three or more electric energy meters as mutually inspection grouping, each electric energy meter measures the load current Ii of this table, and this table firewire is gone out
Line is parallel on the zero curve of next electric energy meter by the current transformer that no-load voltage ratio is K, makes the neutral line current of next electric energy meter
With the increment proportional to the load current of this table, the neutral line current increment of next electric energy meter is that its neutral line current subtracts firewire
Electric current can calculate the load of this table measured by next electric energy meter by the increment again divided by the no-load voltage ratio K of current transformer
Circuit current Ij.
(2) average current value that each this table of electric energy meter measures is acquired according to cycle T (such as 1 minute) by acquisition terminal
Ai and next electric energy meter measure the average current value Aj of this table, and save, and the same period is obtained in acquisition terminal
Two groups of average current value S=Ai1, Ai2 ..., Ain } and T=Aj1, Aj2 ..., and Ajn }, wherein n is electric energy meter
Number, S are the average current value sets of this table of electric energy meter measurement, and T is the average current of this table measured by next electric energy meter
Value set.
(3) acquisition terminal can calculate each this table of electric energy meter detected current value Ai under according to the corresponding relationship of monitoring
The detection error of one electric energy meter detected current value Aj is denoted as W={ E1, E2 ..., En }.
(4) assume that Aik is the average current value that electric energy meter K is measured, Ajk is the table K measured by next table K+1
Average current value can determine in wherein table K, table K+1 a certain piece of table presence if the deviation Ek of two values are more than threshold value E0
Measurement problem.
(5) Aj(k-1) be the table K-1 that table K is measured average current value, Ai(k-1) to be that table K-1 is measured oneself flat
Equal current value, if the deviation E(k-1 of two values) also above threshold value E0, it can determine that wherein there are measurement problems by table K.
According to the above method, when the last one electric energy meter, load is parallel to first electric energy meter by current transformer
On zero curve, make the neutral line current of first electric energy meter that there is the increment proportional to the load current of the last one electric energy meter, benefit
The load current of last electric energy meter is calculated with the increment.Certainly, electric energy meter can also be grouped, and every group 3 or more electric energy meters are
It can.
By in the load current Ii feedback to the zero curve of next electric energy meter of this table, then deposited on the zero curve of next electric energy meter
The load current Ij of this table, the two electric currents can be measured by next electric energy meter by the increment and feedback ratio in increment
Value is theoretically identical, but is constantly present deviation E, if the metering of a certain electric energy meter there is a problem, i.e., in certain a period of time
Between its measured value when being amplified m times of (or reduce), can be easy to release the average current value of its own measurement and be monitored by it
The average current value of a upper electric energy meter can all be amplified m times of (or reduce), then the electric current of itself monitoring and next electric energy meter prison
The current value that deviation Ex between the electric current of survey, the upper electric energy meter current monitored by it and a upper electric energy meter oneself monitor it is inclined
Poor Ey can be amplified m-1 times of (or diminution).A threshold value E0 is set, when two deviations Ex and Ey are above threshold value E0, then should
The metering of electric energy meter there is a problem.
This kind of mode, power meter group will at least be arranged 3, when only 2, can not judge that specifically which is that metering occurs
Problem, only when 3 or 3 or more, when being related to the data that the table measures and all there are problems that measurement deviation, and other tables
When normal, then can be concluded that it is that the table measurement problem occurs.
The present invention is mutually monitored by electric energy meter in operating status, and real-time with higher can be to bug list
It is quickly positioned, reduces metering loss or dispute, and only need to increase several current transformers, cost is relatively low.
Claims (4)
1. a kind of mutual detecting method of multilist of electric energy meter measuring accuracy, it is characterised in that: include the following steps, (1) be arranged three or
As mutually inspection grouping, each electric energy meter measures the load current Ii of this table for three or more electric energy meters, and by the load of this table
On the zero curve of the next electric energy meter of current feedback, make the neutral line current of next electric energy meter have with the load current of this table at than
The increment of example, calculates the load current Ij that next electric energy meter measures this table using the increment；
(2) the average current value Ai and next electricity that each this table of electric energy meter measures are acquired according to cycle T by acquisition terminal
Energy table measures the average current value Aj of this table, and saves, and two groups of average current values of same period are obtained in acquisition terminal
Set S=Ai1, Ai2 ..., Ain } and T=Aj1, Aj2 ..., and Ajn }, wherein n is the number of electric energy meter, and S is electricity
The average current value set of energy Biao Benbiao measurement, T is the average current value set of this table measured by next electric energy meter；
(3) acquisition terminal can calculate each this table of electric energy meter detected current value and next electric energy according to the corresponding relationship of monitoring
The monitoring deviation of table detected current value is denoted as W={ E1, E2 ..., En }；
(4) assume that Aik is the average current value that electric energy meter K is measured, Ajk is being averaged by the next table K+1 table K measured
Current value can determine that a certain piece of table is asked in the presence of metering in wherein table K, table K+1 if the deviation Ek of two values is more than threshold value E0
Topic；
(5) Aj(k-1) be the table K-1 that table K is measured average current value, Ai(k-1) be the average electricity that table K-1 is measured oneself
Flow valuve, if the deviation E(k-1 of two values) also above threshold value E0, it can determine that wherein there are measurement problems by table K.
2. a kind of mutual detecting method of multilist of electric energy meter measuring accuracy according to claim 1, it is characterised in that: step (1)
In, the firewire outlet of this table is parallel on the zero curve of next electric energy meter by the current transformer that no-load voltage ratio is K.
3. a kind of mutual detecting method of multilist of electric energy meter measuring accuracy according to claim 2, it is characterised in that: step (1)
In, the load of the last one electric energy meter is parallel on the zero curve of first electric energy meter by current transformer, and first electric energy is made
The neutral line current of table has the increment proportional to the load current of the last one electric energy meter, calculates last electric energy using the increment
The load current of table.
4. a kind of mutual detecting method of multilist of electric energy meter measuring accuracy according to claim 3, it is characterised in that: step (1)
In, the neutral line current increment of next electric energy meter is that its neutral line current subtracts firewire electric current, by the increment again divided by current transformer
No-load voltage ratio K, the load current of this table measured by next electric energy meter can be calculated.
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| CN201910783624.8A CN110488217B (en) | 2019-08-23 | 2019-08-23 | Multi-meter mutual detection method for metering accuracy of electric energy meter |
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Cited By (1)
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| CN111239673A (en) * | 2020-02-07 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | System and method for detecting residual current metering precision of electric energy meter |
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| CN110488217B (en) | 2021-06-22 |
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