CN105137385A - Method of automatically monitoring resident three phase meter metering faults - Google Patents

Abstract

The invention discloses a method of automatically monitoring resident three phase meter metering faults, comprising the steps of: additionally collecting voltage, current, and voltage loss accumulation time of a three phase meter; collecting the voltage, current, and voltage loss accumulation time of the three phase meter at fixed time and for fixed times; storing collected data of each time in a real time data mode; only reserving a piece of point data, and covering the front point data by subsequent point data, wherein if subsequent collection fails, a last time of collection shall prevail, and supplementary sampling is not carried out if each time of collection fails; clearing the collected data at fixed time each day; after collection each day, a main station copying and reading the voltage, current, and voltage loss accumulation time information reserved by a concentrator, and directly discovering abnormal meters according to an analysis method for a specific power transformer meter. The method requires no additional devices, does not influence daily freezing copying and reading and remote power stopping, and can directly discover abnormal resident three phase meters when transformer zone line loss is abnormal, thereby automatically monitoring and analyzing three phase meter metering faults.

Description

The Method of Automatically Monitoring Measuring Faults of Residents' Three-phase Meter

technical field

The invention relates to a method for automatically monitoring measurement faults of a resident's three-phase meter.

Background technique

Although the electric energy information collection system has achieved full coverage and full collection of household meters, the concentrator that uses a full-carrier network for local communication, due to the limitation of carrier communication, the collection of household meter information is limited to daily frozen meters. According to the daily frozen meter code, the acquisition master station can only complete the calculation and analysis of the settlement and the line loss of the station area. Many, when the line loss in the station area is abnormal, it is difficult to accurately locate which meter has a metering fault, especially for some three-phase users who consume a large amount of electricity and are prone to electricity theft, such as restaurants, teahouses, and entertainment venues. When the abnormal power of the meter is small, it is more difficult to find the metering fault.

Contents of the invention

The purpose of the present invention is to provide a method for automatically monitoring metering faults of residents' three-phase meters to solve the problem that the existing electric energy information collection system cannot accurately troubleshoot faults under abnormal line loss conditions in the station area.

The method for automatically monitoring metering faults of residents' three-phase meters provided by the present invention comprises the following steps:

1) Increase voltage collection, current collection, and voltage loss cumulative time collection for three-phase meters;

2) Set the collection frequency, and collect the three-phase meter voltage, current, and voltage loss cumulative time according to the collection frequency;

3) The data collected each time is saved as real-time data;

4) Only one point of data is kept, and the subsequent ones cover the previous ones. If the subsequent collection is unsuccessful, the previous collection shall prevail, and no supplementary collection will be performed each time the collection is unsuccessful;

5) Clear the collected data regularly every day;

6) After the collection is completed every day, the master station reads the three-phase meter voltage, current, and voltage loss cumulative time information retained by the concentrator, and directly finds the abnormal meter according to the analysis method for the special variable meter.

In one embodiment, the timing and fixed-time collection described in step 2) is set as the collection frequency at 7:00, 11:00, 15:00, and 19:00 every day. In one embodiment, the daily scheduled clearing in step 5) refers to clearing the collected data at zero crossing every day. In one embodiment, the concentrator collects voltage, current, and voltage-loss cumulative time. The data collected at four time points every day only retains one point of data for reading by the master station. The zero-crossing point of the concentrator will clear the collected data.

Compared with the prior art, the present invention has the following significant advantages:

1. Only improve the concentrator software, no need to add additional equipment, and achieve zero cost.

2. Utilizing the spare time of the carrier communication of the concentrator, it will not affect the services such as daily freezing and reading, remote power off and on.

3. When the line loss in the station area is abnormal, the abnormal meter of the three-phase meter of the residents can be directly detected, so as to realize the automatic monitoring and analysis of the metering failure of the three-phase household meter.

Detailed ways

This embodiment is a practical example for monitoring measurement faults of three-phase meters of residents in Zhuzhou City, Hunan Province.

When using the method of the present invention to automatically monitor the metering failure of the three-phase meter of the residents, the following steps are included:

1) Increase voltage collection, current collection, and voltage loss cumulative time collection for three-phase meters;

2) The concentrator regularly collects the voltage, current, and voltage loss cumulative time of the three-phase meter every day. According to the electricity consumption of Zhuzhou residents, the concentrator collection frequency is set to 7:00, 11:00, 15:00, and 19:00 every day ;

3) The data collected each time is saved as real-time data;

4) Do not keep the curve, only keep the data of one point, and the subsequent ones will cover the previous ones. If the subsequent collection is unsuccessful, the previous collection shall prevail, and no supplementary collection will be performed, that is, the last successfully collected data will be retained;

5) The zero-crossing point of the concentrator clears the data collected before;

6) After the concentrator completes the collection every day, the master station reads the three-phase meter voltage, current, and voltage loss cumulative time information retained by the concentrator.

7) According to the analysis method of special variable meters, directly find abnormal meters.

The following is part of the data of the voltage, current and cumulative time of voltage loss of all three-phase meters in Zhuzhou Customer Service Center on May 3, 2015, which was queried in the custom report of the acquisition master station, see Table 1:

Table 1: Residential three-phase meter real-time voltage and current report

Users with abnormal metering can be found after simple sorting, such as:

Chen Jianping, the B-phase voltage is zero, the B-phase current is 0.332A, and the cumulative time of voltage loss is 15827, it can be determined that the B-phase voltage loss of this user. In this way, the measurement failure of the three-phase meter of the residents can be monitored at any time.

The method of the present invention is applicable to the acquisition of the voltage, current, and voltage loss cumulative time of the three-phase meter no matter what equipment or data transmission mode is used. Regarding the setting of collection frequency, it can be set according to the work and rest habits, electricity consumption conditions or work needs of each region.

From this embodiment, it can be seen that there is no need to add additional equipment, and it is not necessary to improve the hardware of the existing equipment. It is only necessary to improve the software of the concentrator, so the hardware investment is zero.

For the concentrator, this embodiment utilizes the spare time period of the concentrator carrier communication, which does not affect services such as daily freezing and reading, remote power off and on. When the line loss in the station area is abnormal, the abnormal meter of the three-phase meter of the residents can be directly detected, so as to realize the automatic monitoring and analysis of the metering failure of the three-phase household meter.

Claims (4)

1. automatically monitor a method for resident's three-phase meter metering fault, comprise the steps:

1) voltage acquisition, current acquisition, the collection of decompression cumulative time are increased to three-phase meter meter;

2) setting gathers frequency, gathers three-phase meter voltage, electric current, decompression cumulative time by this collection frequency;

3) each data gathered are preserved with real time data;

4) only retain a point data, above, subsequent acquisition is unsuccessful, once gather in the past and be as the criterion in follow-up covering, and each collection does not unsuccessfully carry out filling mining;

5) every day, the data gathered were removed in timing;

6), after completing collection every day, three-phase meter voltage, electric current, decompression summed up time information that main website copy reading concentrator retains, according to the analytical approach specially becoming table meter, directly find metering exception table meter.

2. automatically monitor the method for resident three-phase meter metering fault according to claim 1, it is characterized in that step 2) described in collection frequency be set as some every day 7,11 points, 15 points, 19 points.

3. according to claim 1 or 2, automatically monitor the method for resident's three-phase meter metering fault, it is characterized in that the data referring to that every day, zero crossing removing gathered are removed in timing every day described in step 5).

4. automatically monitor the method for resident's three-phase meter metering fault according to claim 3, it is characterized in that gathering voltage, electric current, decompression cumulative time by concentrator, every day only retains the data of a point by main website copy reading in the data of four time point collections, and concentrator zero crossing will remove the data gathered.