CN109490618B - Method for supplementing load curve of electric energy meter - Google Patents
Method for supplementing load curve of electric energy meter Download PDFInfo
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- CN109490618B CN109490618B CN201811159225.6A CN201811159225A CN109490618B CN 109490618 B CN109490618 B CN 109490618B CN 201811159225 A CN201811159225 A CN 201811159225A CN 109490618 B CN109490618 B CN 109490618B
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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
- G01R22/061—Details of electronic electricity meters
- G01R22/063—Details of electronic electricity meters related to remote communication
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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
The method for supplementing and recording the load curve of the electric energy meter comprises the steps of obtaining the power-down time and the power-on time of the electric energy meter; if the power-down time and the power-on time are not in a load cycle, a load compensation curve is not needed; in a load cycle, calculating the number of required additional entries according to the power-down time, the power-on time and the load cycle, and if the number of the additional entries is greater than M, beginning to additionally entry M load curves from the load cycle from the power-down time; if the number of the additional entries is less than M, recording the load curve once; storing the additional information in an additional load curve information block, metering by the electric energy meter, and recording the load; when the number of the residual supplementary entries in the supplementary load curve information block is less than or equal to N, the residual load curve is once supplementary recorded in the next second measured by the electric energy meter, the information in the supplementary load curve information block is updated, and the supplementary load curve information block is removed; if the load curve is larger than N, the N load curves are additionally recorded in the next second measured by the electric energy meter. The complete load curve can be recorded, and the metering of the electric energy meter is not influenced.
Description
Technical Field
The invention relates to the field of electric energy meters, in particular to a method for supplementing and recording a load curve of an electric energy meter.
Background
With the continuous construction of smart power grids and the continuous popularization of smart electric energy meters, power load management is more and more emphasized. The load curve is a necessary function of the intelligent electric energy meter, is a curve of various power loads in the power system changing along with time, and is a basis for power scheduling and power system planning of the power system. The load variation of the power system has randomness, and if the load curve is measured in a discretization mode at certain intervals, for example, a load period is measured, a random time sequence can be obtained. However, due to the influence of social factors such as production and living arrangement of people and natural seasonality, the change of the load curve presents a certain periodicity, so that the change condition of the power load along with time is described by using the load curve, and the regularity of the load change is researched according to the change condition, so that the purposes of power dispatching and planning are achieved.
Therefore, the accuracy and the integrity of the load curve are very important. Particularly, under the power-off condition, whether the complete additional recording load curve can be obtained is an important index for measuring the design level of the intelligent electric energy meter. In the prior art, a plurality of load cycles are crossed during power failure, only one load curve or all load curves are usually supplemented during power-on, the load curve is incomplete when only one load curve is supplemented during power-on, more data needing to be supplemented appear during the whole load curve during power-on, and the load curve needs to be supplemented by consuming time, so that the normal metering of an electric energy meter can be influenced in the process of supplementing and recording the load curve, and the loss is caused to a power station; and when the load curve data needing to be added are many, if power failure occurs in the process of adding the load curve, a standby power supply is needed to ensure that the power can be added completely, so that the hardware cost is increased, and the scheme is not strong in universality.
The Chinese invention patent with application number CN201711033468.0 (application publication number CN107918052A) discloses a method for calculating the additional record of a load curve, which comprises the steps of recording the time point of power failure and the time point of power re-on; converting the time point of power failure and the time converted into the distance from the specific time point as starting points, and converting the time point of power re-electrification into the time converted into the distance from the specific time point as end points; calculating the number of records needing to be supplemented from the starting point to the end point by adopting a non-cyclic calculation method; and supplementing the obtained data of the recorded number at one time from the recorded power failure time point, thereby completing the supplement of the load curve. The invention adopts the non-cyclic calculation method to replace the original cyclic calculation method to calculate the number of data to be supplemented, thereby greatly simplifying the realization of functions, having simple sentences, and greatly improving the product performance by using the algorithm function, particularly in the occasions needing to be called repeatedly; the method has the advantages of high response speed, quick operation, simple and reliable method and capability of meeting the national standard requirements. However, the data of the number of records obtained by one-time supplement in the method can influence the normal operation of the electric energy meter, so that further improvement is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for supplementing and recording a load curve of an electric energy meter, which does not influence the use of the electric energy meter and does not lose data when the electric energy meter is powered off, aiming at the current situation of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for supplementing and recording a load curve of an electric energy meter is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps of (1) obtaining power-down time and power-on time of an electric energy meter;
step (2), judging whether the power-on time is greater than the power-off time, if so, turning to step (3); if not, abnormity occurs, and the operation is finished;
step (3), judging whether the power-down time and the power-on time are in a load cycle, if so, measuring and recording the load by the electric energy meter without a load compensation curve, and ending; if not, calculating the number of load curves needing to be additionally recorded according to the power-down time, the power-on time and the load period, and turning to the step (4);
step (4), judging whether the number of the additional entries is greater than M, if so, beginning to additionally enter M load curves from a load period starting from the power failure time; if not, the load curve is recorded once; wherein M is a positive integer;
step (5), storing the additional information in an additional load curve information block, metering by the electric energy meter, and recording the load;
step (6), judging whether the number of the residual supplementary entries in the supplementary load curve information block is less than or equal to N, if so, performing one-time supplementary entry on the residual load curve in the next second measured by the electric energy meter, updating information in the supplementary load curve information block, and clearing the supplementary load curve information block; if not, the step (7) is carried out; wherein N is a positive integer;
and (7) supplementing and recording N load curves in the next second measured by the electric energy meter, and turning to the step (5).
Specifically, the step of calculating the number of entries in step (3) is as follows: when the power-off time and the power-on time are not in one load cycle, calculating a first load cycle in which the power-off time is located and a second load cycle in which the power-on time is located, calculating a difference value between a starting time point of the second load cycle and a starting time point of the first load cycle, and dividing the difference value by the number of the load cycles needing to be added.
The electric energy meter at least comprises a load curve channel, the load curve channel is provided with a plurality of load compensation curve information blocks, and the load compensation curve information blocks are stored in an EEPROM memory.
Specifically, the load compensation curve information block includes power-down time, power-up time, the number of remaining compensation entries, the number of load cycles of each load curve channel, and a checksum. By storing the information of the power failure time, the power-on time, the residual supplement entry number, the load cycle number of each load curve channel, the check sum and the like in the supplement load curve information block, the information is not lost when the electric energy meter is powered off, and can be continuously supplemented, so that the power failure is not influenced when the electric energy meter is powered off.
And when the CRC of the load compensation curve information block is wrong, the load compensation curve is not recorded.
In order to not influence the normal metering of the electric energy meter, normal load recording is triggered in the process of additionally recording the load curve after the electric energy meter is powered on, the normal load recording is processed preferentially, and then the additionally recorded load curve is processed. .
In order to prevent the abnormal data reading caused by incomplete load compensation curve in the process of load compensation curve, in the scheme, if the upper computer or the master station sends a request for data reading in the process of load compensation curve, the data reading is not allowed, and the data reading is not allowed until the complete load compensation curve is completely recorded.
Preferably, the duty cycle is 15 minutes.
And (3) the value range of N in the step (6) and the step (7) is 3-6.
Preferably, N in the step (6) and the step (7) is 5.
Compared with the prior art, the invention has the advantages that: the number of load curves needing to be subjected to additional recording is calculated according to the power-down time, the power-on time and the load period, the additional recorded load curves are distributed after the electric energy meter is subjected to metering work after power-on, normal use of the electric energy meter is not influenced, the complete load curves are subjected to additional recording, additional recording information is stored in a load curve information block after one-time additional recording, influence of repeated power-on stopping in the additional recording process on the additional recording process is prevented, the load curves are guaranteed not to be lost when power is stopped every time, and therefore influence on the electric energy meter in the load curve supplementing process can be effectively solved.
Drawings
Fig. 1 is a flowchart of a method for supplementing a load curve of an electric energy meter according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, a method for supplementing a load curve of an electric energy meter is characterized in that: the method comprises the following steps:
the method comprises the following steps of (1) obtaining power-down time and power-on time of an electric energy meter;
step (2), judging whether the power-on time is greater than the power-off time, if so, turning to step (3); if not, abnormity occurs, and the operation is finished;
step (3), judging whether the power-down time and the power-on time are in a load cycle, if so, measuring and recording the load by the electric energy meter without a load compensation curve, and ending; if not, calculating the number of load curves needing to be additionally recorded according to the power-down time, the power-on time and the load period, and turning to the step (4);
wherein, the calculation steps of the number of the additional entries are as follows: when the power-off time and the power-on time are not in one load cycle, calculating a first load cycle in which the power-off time is located and a second load cycle in which the power-on time is located, calculating a difference value between a starting time point of the second load cycle and a starting time point of the first load cycle, and dividing the difference value by the number of the load cycles to be complemented;
step (4), judging whether the number of the additional entries is greater than M, if so, beginning to additionally enter M load curves from a load period starting from the power failure time; if not, the load curve is recorded once; wherein M is a positive integer; the value range of M is 2-4, and in the embodiment, M is 2;
step (5), storing the additional information in an additional load curve information block, metering by the electric energy meter, and recording the load;
in the embodiment, the electric energy meter at least comprises a load curve channel, the load curve channel is provided with a plurality of load supplementing curve information blocks, the load supplementing curve information blocks are stored in an EEPROM (electrically erasable programmable read-only memory), and the load supplementing curve information blocks comprise power-down time, power-up time, residual supplement entry number, load cycle number and checksum of each load curve channel;
step (6), judging whether the number of the residual supplementary entries in the supplementary load curve information block is less than or equal to N, if so, performing one-time supplementary entry on the residual load curve in the next second measured by the electric energy meter, updating information in the supplementary load curve information block, and clearing the supplementary load curve information block; if not, the step (7) is carried out; wherein N is a positive integer; the value range of N is 3-6, and in the embodiment, N is 5;
and (7) supplementing and recording N load curves in the next second measured by the electric energy meter, and turning to the step (5).
When the electric energy meter is used, whether a load compensation curve is needed or not is calculated according to the power-off time and the power-on time of the electric energy meter, and if the load compensation curve is needed to be within two, the load compensation curve is directly subjected to one-time compensation after power-on; if more than 2 load curves need to be additionally recorded, two load curves are additionally recorded after power-on initialization, information of the load curves is stored in a load curve information block, when the electric energy meter works normally, the remaining load curves are additionally recorded, only 5 load curves are additionally recorded every second, and the load curve information block is removed until the completion of the load curve information block. If CRC of the load supplementing curve information block stored in the EEPROM is wrong, the load curve is not supplemented, and if normal load record is triggered in the process of the load supplementing curve, for example, a load curve recording point is just passed, the normal load record is processed preferentially at the moment, and the supplemented load curve is processed again.
In addition, in the process of registering the load curve, if the upper computer or the master station sends a request for data reading, the data reading is abnormal because the data is not completed, so the data is directly returned to the system busy, and the reading is not allowed until all the load curves are completely registered; however, the work of each load curve channel is not interfered with each other, and if the load curve channel 2 is completely recorded and the load curve channels 1,3 and 4 are not completely recorded, the load curve channel 2 is allowed to record and read if the upper computer or the master station sends a request for reading and reading data.
In the scheme, after power-on, firstly, 2 load curves are recorded additionally, then, the electric energy meter is started to measure, electric quantity is guaranteed not to be lost, load records are recorded additionally one by one in idle time until the load curves are completely compensated, the load records are guaranteed not to leak, a complete load curve in full time is provided, the load curves are uniformly distributed and supplemented after the electric energy meter is normally measured, and the measurement and communication of the electric energy meter are not influenced, so that the problems that in the prior art, only one load curve is compensated when the power-on is stopped, the load curve is incomplete, or the consumed time is too long when all the load curves are compensated and recorded during power-on initialization, and the measurement of the electric energy meter is influenced are solved, meanwhile, the power-on is stopped for many times, the compensated and recorded load curve information is stored in a compensated load curve information block, and after the power-on, the load curves are continuously compensated and recorded.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A method for supplementing and recording a load curve of an electric energy meter is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps of (1) obtaining power-down time and power-on time of an electric energy meter;
step (2), judging whether the power-on time is greater than the power-off time, if so, turning to step (3); if not, abnormity occurs, and the operation is finished;
step (3), judging whether the power-down time and the power-on time are in a load cycle, if so, measuring and recording the load by the electric energy meter without a load compensation curve, and ending; if not, calculating the number of load curves needing to be additionally recorded according to the power-down time, the power-on time and the load period, and turning to the step (4);
step (4), judging whether the number of the additional entries is greater than M, if so, beginning to additionally enter M load curves from a load period starting from the power failure time; if not, the load curve is recorded once; wherein M is a positive integer;
step (5), storing the additional information in an additional load curve information block, metering by the electric energy meter, and recording the load; the electric energy meter at least comprises a load curve channel, the load curve channel is provided with a plurality of load compensation curve information blocks, and the load compensation curve information blocks are stored in an EEPROM (electrically erasable programmable read-only memory); the load supplementing curve information block comprises power-down time, power-on time, the number of residual additional entries, the number of load cycles of each load curve channel and a check sum;
step (6), judging whether the number of the residual supplementary entries in the supplementary load curve information block is less than or equal to N, if so, performing one-time supplementary entry on the residual load curve in the next second measured by the electric energy meter, updating information in the supplementary load curve information block, and clearing the supplementary load curve information block; if not, the step (7) is carried out; wherein N is a positive integer;
in addition, in the process of additionally recording the load curve, when the CRC of the load curve information block is wrong, the load curve is not additionally recorded; if normal load records are triggered in the process of additionally recording the load curves after power-on, the normal load records are processed preferentially, and then the additionally recorded load curves are processed; in addition, in the process of additionally recording the load curve, if the upper computer or the master station sends a request for data reading, the data reading is not allowed, and the data reading is not allowed until all the load curves are completely additionally recorded;
and (7) supplementing and recording N load curves in the next second measured by the electric energy meter, and turning to the step (5).
2. The method for supplementing a load curve of an electric energy meter according to claim 1, characterized in that: the step of calculating the number of the supplementary entries in the step (3) comprises the following steps: when the power-off time and the power-on time are not in one load cycle, calculating a first load cycle in which the power-off time is located and a second load cycle in which the power-on time is located, calculating a difference value between a starting time point of the second load cycle and a starting time point of the first load cycle, and dividing the difference value by the number of the load cycles needing to be added.
3. The method for supplementing a load curve of an electric energy meter according to claim 1, characterized in that: the duty cycle was 15 minutes.
4. The method for supplementing a load curve of an electric energy meter according to claim 1, characterized in that: and (3) the value range of N in the step (6) and the step (7) is 3-6.
5. The method for supplementing a load curve of an electric energy meter according to claim 1, characterized in that: n in the step (6) and the step (7) is 5.
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| CN110648525B (en) * | 2019-09-25 | 2020-07-28 | 宁波三星医疗电气股份有限公司 | Data complementary reading method and device and power acquisition terminal |
| CN110660004B (en) * | 2019-09-29 | 2022-03-18 | 威胜集团有限公司 | Curve data reading method, electric energy meter and storage medium |
| CN111141951B (en) * | 2019-12-23 | 2022-03-01 | 宁波三星医疗电气股份有限公司 | Power terminal data acquisition method and device and electronic equipment |
| CN111797031B (en) * | 2020-06-17 | 2023-06-23 | 江西洪都航空工业集团有限责任公司 | Method for recording power-on accumulated time of task machine by using EEPROM under condition of no battery |
| CN114252692B (en) * | 2021-12-23 | 2024-02-20 | 国网辽宁省电力有限公司沈阳供电公司 | Data complement acquisition and storage method and system for electric energy acquisition system |
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