CN111596253A

CN111596253A - Method for governing clock error through broadcast time synchronization on 09 standard intelligent meter

Info

Publication number: CN111596253A
Application number: CN201910786564.5A
Authority: CN
Inventors: 郑在柱; 郑亚岗; 苏超; 孙德辉
Original assignee: Qingdao Topscomm Communication Co Ltd
Current assignee: Qingdao Topscomm Communication Co Ltd
Priority date: 2019-08-24
Filing date: 2019-08-24
Publication date: 2020-08-28

Abstract

The method discloses a method for calibrating the electric energy meter for 5 minutes every day by using a broadcast time calibration mode within a period of time and maintaining the clock error of the electric energy meter within 5 minutes. The accurate clock source and the accurate clock of the electric energy meter end are obtained by combining the transformer area management unit, so that the clock errors of the management unit and the electric energy meter can be calculated accurately; the electric energy meter is calibrated for 5 minutes every day in a broadcast time calibration mode within a period of time, and the clock error of the electric energy meter is maintained within 5 min.

Description

Method for governing clock error through broadcast time synchronization on 09 standard intelligent meter

Technical Field

The method effectively solves the problem of 09-standard intelligent meter clock management which puzzles power supply enterprises for a long time. The traditional manual time correction mode is changed, and more reliable criteria are provided. By using the method, the clock management automation is realized, the manual and instrument cost of the investigation is saved, and the operation efficiency is improved; (2) and reliable criteria are provided, and the management level is improved.

Background

With the continuous and deep application of the electricity utilization information acquisition system, links such as time-sharing rate electricity price popularization, assessment calculation of voltage line loss of each grade, reporting of power outage and transmission events and the like all put higher requirements on the time accuracy of the electric energy meter and the acquisition equipment. The clock of the intelligent electric energy meter is abnormal, so that the effective control of the power utilization information acquisition success rate and the line loss rate is influenced, time-sharing rate metering errors are easily caused, and customer complaints are caused.

The abnormal phenomenon of the clock of the single-phase intelligent electric energy meter is particularly prominent, due to the fact that the installation quantity of the single-phase intelligent electric energy meter is large, large batch of clock abnormality often occurs, instable factors are caused to the execution of time-of-use electricity prices of residents and clients, and the fact that an alarm lamp of the intelligent electric energy meter is bright and white due to the clock abnormality is always a hot spot reflected by the clients. Therefore, power supply enterprises must timely and accurately perform fault analysis, judgment and processing on the clock abnormality of the intelligent electric energy meter.

The information of the intelligent electric energy meter with the abnormal clock is recorded in the electricity utilization information acquisition system, and the intelligent electric energy meter with the abnormal clock can be inquired in the electricity utilization information acquisition system or found in a field inquiry mode.

In the traditional operation, a worker finds that the clock of the intelligent electric energy meter is abnormal through field inspection on a meter installation field. And inquiring the collection timeliness of the intelligent electric energy meter after the power failure of the platform area, and screening and checking on site the intelligent electric energy meter which cannot be collected in time or is abnormal in collection to find out the abnormal clock intelligent electric energy meter.

For the intelligent electric energy meter with clock deviation within +/-5 min, broadcast timing or manual timing can be used, and related personnel are required to perform on-site inspection processing if remote timing operation fails.

The intelligent meter is specified to 09, and the remote time correction is very inconvenient because the on-site key matching is needed; although a remote time correcting mode of broadcasting time correction is supported, the time correction can be performed only for 5 minutes and only once a day, and the executed electric energy meter does not execute any broadcasting time correction command of the day any more.

Through the combination of the basic functions, the electric energy meter can be calibrated for 5 minutes every day in a broadcast time comparison mode within a period of time, and the clock error of the electric energy meter is maintained within 5 min.

Disclosure of Invention

In order to solve the problem of 09 standard intelligent meter clock management in the prior art, the method provides a method for calibrating the electric energy meter for 5 minutes every day by using a broadcast time calibration mode within a period of time and maintaining the clock error of the electric energy meter within 5 minutes.

Drawings

FIG. 1 is a flow chart of the method.

Detailed Description

The first principle is as follows:

09, the remote time correction of the electric energy meter requires the cooperation of on-site keys, which is very inconvenient.

09 the electric energy meter supports a remote time correction mode of broadcasting time correction, but the time correction can be carried out for only 5 minutes.

09 the broadcast timing electric energy meter can only be executed once a day, and the executed electric energy meter does not execute any broadcast timing command of the day any more.

The 13762 protocol requirement of the 13 specification, which explicitly requires carrier channel support to provide a broadcast time delay, allows simultaneous transmission of broadcast commands to all slave nodes.

Secondly, data acquisition:

the method comprises the steps that a platform area management unit obtains an accurate clock source;

an accurate clock at the electric energy meter end;

and calculating the clock errors of the management unit and the electric energy meter.

Thirdly, a data acquisition mode:

clock source: obtaining through a master station;

clock source: obtaining through a local concentrator;

the clock error of the electric energy meter end is as follows: the current time and date of the electric energy meter are remotely read.

Note: because the electric energy meter clock is two data items, a meter reading interval exists between reading. In order to ensure the accuracy of time, the time is read firstly, if the time is less than 23:58, the date is read, otherwise, the date is not read, and the phenomenon that the reading time clock spans days is avoided.

Fourth, algorithm application

And controlling the time error range needing time correction through a parameter threshold, and not processing the electric energy meter with overlarge clock error.

The electric energy meter is calibrated in a broadcasting mode, and the clock error of the electric energy meter is reduced by 4 minutes in each calibration.

And planning the deviation time needing time correction by judging and calculating the clock error and arranging a time correction task.

The time correction starts from the correct clock, the time correction is sequentially increased (increased or decreased on the correct clock) according to the planned time correction time deviation, the time correction times of the electric energy meter with the correct clock are consumed in the broadcasting of the current day, and the clock deviation of the electric energy meter with errors is sequentially decreased for 4 minutes.

Fifthly, time synchronization result

And comparing the clock errors of the electric energy meters obtained each time, and observing a time comparison result.

Sixthly, task execution mode

Task starting mode: and issuing a task execution switch, issuing a task execution time interval, and issuing a clock error range of the electric energy meter allowed by the task.

And (3) reading data by the task: 1. a concentrator clock; 2. a clock of the electric energy meter; 3. and issuing broadcast timing commands with different clock deviations.

Seventhly, task execution flow

1. Starting a clock reading task of the electric energy meter;

2. reading the electric energy meter clock of each electric energy meter in sequence (reading time firstly, and reading date), and recording the electric energy meter clock error;

3. judging whether a clock proofreading task switch is turned on or not;

4. judging whether the clock correction task is within an allowed starting time period or not;

5. judging whether the clock error of the electric energy meter exceeds a timing threshold or not, and respectively belonging to the timing grade;

6. starting a timing task, acquiring a clock of the concentrator as a clock source, broadcasting a correct clock of the timing electric energy meter for multiple times according to a set threshold value, and using the correct clock for the consumption of the broadcasting timing times of the electric energy meter once a day;

7. according to the magnitude of the clock error level, broadcast timing commands are sequentially sent, the level electric energy meter is calibrated for 4 minutes, and only 4 minutes are calibrated each time by considering carrier communication delay;

8. and judging whether the clock correction task is outside the allowed time period, if so, ending the task.

Claims

1. A method for managing clock errors of an electric energy meter through broadcasting time synchronization on a 09 standard intelligent meter. The key point of the invention is that the electric energy meter is calibrated for 5 minutes every day in a broadcast time setting mode within a period of time, and the clock error of the electric energy meter is maintained within 5 minutes.