CN110726964A - Remote diagnosis method based on voltage and current measurement abnormity - Google Patents

Abstract

The invention discloses a method for remote diagnosis of measurement abnormality based on voltage and current, and relates to a remote diagnosis method for measurement abnormality. At present, the abnormal processing of voltage and current measurement often directly initiates dispatch without analyzing the cause of the abnormality, resulting in a waste of resources. The invention includes: preliminary diagnosis and remote master station analysis; when analyzing the remote master station, check the master station file and load data; according to the generated abnormal equipment work order, analyze the abnormal equipment data reported recently; When the sex and file data are wrong, it can not be processed and transferred to be archived, and other failed abnormal work orders try to be processed remotely. In this technical solution, preliminary diagnosis is performed first, followed by remote preprocessing, and the abnormality that can be remotely operated is directly dealt with, which reduces the on-site dispatch of the subsequent sequence and reduces the labor cost; the diagnosis result is used for the subsequent abnormal processing, and the abnormal processing is increased. It can improve the efficiency of dealing with abnormal faults on site and reduce the waste of resources.

Description

A Remote Diagnosis Method Based on Voltage and Current Metering Abnormalities

technical field

The invention relates to a method for remote diagnosis of abnormal measurement, in particular to a method for remote diagnosis of abnormal measurement based on voltage and current.

Background technique

As the construction scale and coverage of the collection system increase year by year, its application fields have gradually expanded, and the application effect has been significantly improved. Standardized and standardized on-site operations, realize real-time operation and operation and maintenance monitoring of important information such as user load, electricity, voltage, and current, and provide basic data for other business systems in a timely and accurate manner. The electricity consumption information collection systems in the prior art generally cannot make full use of advanced technologies such as big data, the Internet of Things and wireless communication networks, and the system functions are single, and generally only have the collection function and basic data analysis and calculation functions. Existing methods for measuring abnormal voltage and current, or do not use remote processing or remote processing is only for querying historical data, lack of effective analysis and diagnosis wizards, resulting in personnel directly dispatching work without analyzing the cause of the abnormality, or Directly initiating the process of replacing the terminal or replacing the electric meter will cause waste of resources and is not conducive to handling abnormal on-site faults, affecting the efficiency of abnormal processing of voltage and current.

SUMMARY OF THE INVENTION

The technical problem to be solved and the technical task proposed by the present invention are to perfect and improve the existing technical solutions, and to provide a remote diagnosis method based on voltage and current measurement abnormality, so as to achieve the purpose of improving the processing efficiency of voltage and current abnormality. Therefore, the present invention adopts the following technical solutions.

A remote diagnosis method based on voltage and current type measurement abnormality A remote diagnosis method based on voltage and current type measurement abnormality is characterized by comprising the following steps:

1) Get the generated abnormal work order;

2) Preliminary diagnosis; the system monitors voltage and current measurement anomalies, remotely diagnoses user event failure work orders, classifies them according to equipment, extracts details of voltage and current abnormality failures, and generates voltage and current measurement abnormalities remote diagnosis work orders;

3) Remote master station analysis, check the master station file and load data; according to the generation of abnormal equipment work orders, analyze the recently reported abnormal equipment data; when it is determined to be false positives, sporadic and file data errors, it can not be processed and transferred to wait Archive, other failed exception tickets attempt remote processing, remote diagnostic processing includes the following:

301) Check whether the meter data is abnormal, if yes, go to step 306); if not, go to step 302);

302) Determine whether the voltage change at the same point is related to the current, if so, go to step 306); if not, go to step 303);

303) Determine whether the voltage loss phase current gradually decreases, if so, go to step 306); if not, go to step 304);

304) Determine whether the voltage-loss phase voltage is significantly lower than normal, if so, go to step 306); if not, go to step 305);

305) Determine whether the corresponding phase voltage of the terminal called for testing is abnormal, if so, go to step 306); if not, go to step 310);

306) Initiate a special inspection process and note the basic judgment;

307) Determine whether the load data is all cleared; if yes, go to step 309); if not, go to step 308);

308) issue the measurement point parameter reinvestment task; then enter step 309);

309) Remote diagnosis and recovery situation; if the remote processing is successful but the recovery is not dispatched to the site for processing, the recovered ones can be archived and ended;

310) Initiate the on-site processing flow; when the on-site processing is completed, perform on-site feedback, and go to step 309).

This technical solution adopts a closed-loop management process from abnormal discovery, remote diagnosis, dispatch to on-site processing, and combines big data technology to construct a remote diagnosis process for voltage and current measurement abnormalities. In the main station of the acquisition system, technical means such as data comparison, statistical analysis and data mining are used to diagnose and analyze the operation status of the metering equipment, determine whether the metering equipment is in normal operation, and realize the auxiliary decision-making function.

As a preferred technical means: in step 301), if the load data of the meter called for testing is abnormal, check whether the load data is cleared, and if so, further judge whether the abnormality is restored, and dispatch workers to the site for processing if the load data is not cleared. The parameters of the measurement point are issued to re-enter the task, the recovered ones are transferred to be archived, and the unrecovered ones are dispatched to the site for processing, and they can be archived after recovery.

As a preferred technical means: in step 301), the data of the test terminal itself and the meter data are compared; the data of the test terminal itself and the meter data are compared, if the terminal data is normal, it can be preliminarily determined to be a wiring problem or a meter problem , send workers to the site for processing and verification, if there is a wiring or metering problem, make on-site adjustments; after processing is restored, it can be archived.

As a preferred technical means: in step 302), when judging whether the voltage change at the same point is related to the current, check the voltage and current changes at the same point; if it is found that the three-phase voltage changes significantly with the three-phase balance, the current, and the current is larger than the current. If the voltage drops significantly, and the phase voltage with small current rises significantly, it is judged that it is suspected that the neutral point drift causes the three-phase voltage difference, and a special inspection process is initiated and the basic judgment is noted; if it is found that the voltage is sometimes normal and sometimes low, it is judged as a voltage If the circuit is in poor contact and the voltage is unstable, the starting time and recovery time of the voltage loss can be measured, or when the voltage is low and does not return to normal, go to the site for inspection and carry out the transformation of the metering circuit to restore the voltage to normal and stable.

As a preferred technical means: in step 303), check the voltage loss phase change; if the voltage loss phase voltage gradually decreases, it may be determined that the primary side fuse of the voltage transformer is blown, or the voltage sampling line of the current transformer is overheated and blown, or Other voltage connectivity failures.

As a preferred technical means: in step 304), check the current change of the voltage-loss phase; if the current data of the voltage-loss phase is significantly lower than the data before the voltage loss, it may be determined that the power supply is faulty on the primary side, the drop fuse is blown or a high voltage Line voltage is low fault.

As a preferred technical means: it also includes a preparation step, which is used to establish a voltage and current measurement abnormality diagnosis calculation model; the remote master station analyzes and judges according to the voltage and current measurement abnormality diagnosis calculation model.

As a preferred technical means: the voltage and current measurement abnormality diagnosis calculation model includes a voltage phase failure diagnosis model, which is used to diagnose whether it is a voltage phase failure; the diagnosis method is:

A) Three-phase three-wire open-phase: the voltage of any phase in the AC phase is less than K*reference voltage, and the voltage of the other phase is not less than K*reference voltage; K is the coefficient;

B) Three-phase four-wire open-phase: the voltage of any phase is less than K*reference voltage, and the voltage of any phase of the other two-phase voltage is not less than K*reference voltage; K is the coefficient;

C) Multiple points need to be monitored in one day; if there is a voltage phase failure event at the power meter or terminal at the same time, an abnormal voltage phase failure will be generated immediately, otherwise the abnormality should be generated only after meeting the data diagnosis requirements for 3 consecutive days.

As a preferred technical means: in step c), 3 points need to be monitored in one day; K is 60%.

Beneficial effects:

This technical solution is based on the remote diagnosis method of voltage and current measurement abnormality, and realizes the closed-loop management process from abnormality discovery, remote diagnosis, dispatch to on-site processing; The accuracy of on-site data, when abnormal data occurs, timely feedback to the collection master station, thus reflecting the effective support of the collection operation and maintenance closed-loop management system for the collection system data, greatly improving user satisfaction.

When this technical solution remotely handles voltage and current measurement abnormalities, it can realize wizard-style abnormal analysis and diagnosis, support the query of the master station's file data, directly call and measure whether the meter data is abnormal, call and measure the terminal voltage, current and power data, and can also compare The recently reported data can effectively determine the cause of the abnormality and greatly improve the efficiency of voltage and current abnormality processing.

In this technical solution, preliminary diagnosis is performed first, followed by remote preprocessing, and the abnormality that can be remotely operated is directly dealt with, which reduces the on-site dispatch of the subsequent sequence and reduces the labor cost; the diagnosis result is used for the subsequent abnormal processing, which increases the abnormal processing. It can improve the efficiency of handling abnormal faults on site, reduce the processing method of directly initiating the process of replacing terminals or replacing electric meters, and reduce the waste of resources.

Description of drawings

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is a flowchart of the remote diagnosis of the present invention.

Detailed ways

The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings.

According to the remote diagnosis situation of voltage and current measurement abnormality pushed by the online monitoring system of the measurement device, the invention completes abnormal processing such as remote diagnosis abnormal monitoring, intelligent analysis and on-site processing of voltage and current measurement abnormality.

As shown in Figure 1, the overall closed-loop process is:

1) Diagnostic analysis of abnormal voltage and current;

2) Work order generation;

3) Remote analysis;

4) Judge whether there is a false alarm or data error; if so, end; if not, deal with it on-site;

5) After the on-site processing is completed, enter the on-site feedback;

6) Result verification;

7) Determine whether the abnormality is resolved; if so, end, if not, enter the on-site processing, and return to step 5) until the abnormality is resolved.

In this technical scheme, combined with big data technology, a remote diagnosis process for voltage and current measurement anomalies is constructed. By collecting and processing the data of the main station electric energy meter, data comparison, statistical analysis and data mining are carried out in the main station of the acquisition system. and other technical means to diagnose and analyze the operation status of the metering equipment, determine whether the metering equipment is in normal operation, and realize the auxiliary decision-making function. The realization process includes: by acquiring the measurement data information of the electric energy meter of the main station and the electric energy meter of the acquisition terminal, such as equipment operation status, voltage curve data and current curve data. Based on the remote diagnosis and analysis of abnormal voltage and current measurement, check the master station file and load data, and analyze and judge the abnormal phenomenon of voltage and current in combination with voltage, current, and power changes. By analyzing the results of voltage, current, power and load data, it can be found that voltage phase failure, voltage out-of-limit, current loss, current unbalance and voltage unbalance and other abnormalities, and the abnormal historical data analysis can be used to adjust parameters, or combine field equipment Operation status, analysis and adjustment of field equipment, etc. On-site adjustment is made for the abnormality of on-site operating equipment, and on-site processing feedback is carried out by dispatching workers to the on-site process. The above methods greatly improve the on-site steps of exception handling, and find the root cause of the problem in a targeted manner, thereby better improving the efficiency of on-site operation and maintenance.

Specifically, as shown in Figure 2, the present invention comprises the following steps:

1) Get the generated abnormal work order;

2) Preliminary diagnosis; the system monitors voltage and current measurement anomalies, remotely diagnoses user event failure work orders, classifies them according to equipment, extracts details of voltage and current abnormality failures, and generates voltage and current measurement abnormalities remote diagnosis work orders;

3) Remote master station analysis, check the master station file and load data; according to the generation of abnormal equipment work orders, analyze the recently reported abnormal equipment data; when it is determined to be false positives, sporadic and file data errors, it can not be processed and transferred to wait Archive, other failed exception tickets attempt remote processing, remote diagnostic processing includes the following:

301) Check whether the meter data is abnormal, if yes, go to step 306); if not, go to step 302);

302) Determine whether the voltage change at the same point is related to the current, if so, go to step 306); if not, go to step 303);

303) Determine whether the voltage loss phase current gradually decreases, if so, go to step 306); if not, go to step 304);

304) Determine whether the voltage-loss phase voltage is significantly lower than normal, if so, go to step 306); if not, go to step 305);

305) Determine whether the corresponding phase voltage of the terminal called for testing is abnormal, if so, go to step 306); if not, go to step 310);

306) Initiate a special inspection process and note the basic judgment;

307) Determine whether the load data is all cleared; if yes, go to step 309); if not, go to step 308);

308) issue the measurement point parameter reinvestment task; then enter step 309);

309) Remote diagnosis and recovery situation; if the remote processing is successful but the recovery is not dispatched to the site for processing, the recovered ones can be archived and ended;

310) Initiate the on-site processing flow; when the on-site processing is completed, perform on-site feedback, and go to step 309).

The specific embodiments are further explained below. In this embodiment, it includes the following:

1. Establish a calculation model for the diagnosis of abnormal measurement of voltage and current. Such as voltage phase failure diagnosis.

2. Preliminary diagnosis. The system monitors voltage and current measurement anomalies and remotely diagnoses user event failure work orders, classifies them according to equipment, extracts details of voltage and current abnormal failures, and generates voltage and current measurement abnormalities remote diagnosis work orders.

3. Remote master station analysis, view master station files and load data. Analyze the recently reported abnormal equipment data according to the generated abnormal equipment work order, and determine that it is a false positive, sporadic and file data error, which can not be processed and transferred to be archived. Other failed abnormal work orders try to be processed remotely. The remote diagnosis processing includes the following contents :

(1) Call and measure the load data of the meter. If it is abnormal, check whether the load data is cleared. If it is, then further judge whether the abnormality is restored. If it is not restored, it will be sent to the site for processing; if the load data is not cleared, the parameters of the measurement point will be sent to the task again. If it is restored, it will be archived and not restored. The dispatched workers are sent to the site for processing, and the restoration can be archived.

(2) Call and test terminal own data and meter data. Compare the data of the test terminal itself with the meter data. If the terminal data is normal, it can be preliminarily determined to be a wiring problem or a meter problem, and dispatch workers to the site for processing and verification. to archive.

(3) Check the voltage and current changes at the same point. If it is found that the three-phase voltage changes significantly with the three-phase balance, the voltage of the phase with large current drops significantly, and the phase with small current increases the voltage significantly, then it is suspected that the neutral point drift causes the three-phase voltage difference, and a special project is initiated. Check the process and remark the basic judgment; if it is found that the voltage is sometimes normal and sometimes low, it is considered that the voltage circuit is in poor contact and the voltage is unstable. When on-site inspection is carried out, the metering circuit is reformed to restore the voltage to normal and stable.

(4) Check the pressure loss phase change. If the phase voltage of the voltage loss gradually decreases, it may be judged that the fuse on the primary side of the voltage transformer is blown, or the voltage sampling line of the current transformer is overheated and blown, or other voltage connectivity faults.

(5) Check the voltage loss phase current change. If the current data of the voltage-loss phase is significantly lower than the data before the voltage-loss, it may be judged that the primary side of the power supply is faulty, the drop fuse is blown or the voltage of the high-voltage line is low.

Diagnose recovery conditions remotely. If the remote processing is successful and the unrecovered ones are dispatched to the on-site processing, the recovered ones can be archived.

A method for remote diagnosis based on voltage and current measurement abnormality shown in Figures 1 and 2 above is a specific embodiment of the present invention, which has already embodied the substantial features and progress of the present invention, and can be used in the enlightenment of the present invention according to actual use needs. Under the following conditions, equivalent modifications in terms of shape and structure are included in the protection scope of this scheme.

Claims (9)

1. A remote diagnosis method based on voltage and current measurement abnormity is characterized by comprising the following steps:

1) acquiring the generated abnormal work order;

2) performing primary diagnosis; the system monitors voltage and current type metering abnormity, remotely diagnoses a user event failure work order, classifies the user event failure work order according to equipment, extracts details of voltage and current type abnormal failure, and generates a voltage and current type metering abnormity remote diagnosis work order;

3) the remote master station analyzes and checks the master station file and the load data; analyzing the reported abnormal equipment data in the near term according to the generated abnormal equipment work order; when false alarm, sporadic and file data error are determined, the remote diagnosis processing comprises the following contents:

301) calling whether the data of the electric meter is abnormal or not, and if so, entering step 306); if not, go to step 302);

302) judging whether the voltage change at the same point is related to the current, if so, entering step 306); if not, go to step 303);

303) judging whether the voltage-loss phase current is gradually reduced, if so, entering step 306); if not, go to step 304);

304) judging whether the voltage of the voltage-loss phase is obviously reduced compared with the normal voltage, if so, entering step 306); if not, go to step 305);

305) judging whether the corresponding phase voltage of the calling terminal is abnormal or not, and if so, entering step 306); if not, go to step 310);

306) initiating a special inspection process and making remark basic judgment;

307) judging whether the load data is completely cleared; if yes, go to step 309); if not, go to step 308);

308) issuing a measuring point parameter re-throwing task; then step 309) is entered;

309) remotely diagnosing a recovery condition; if the remote processing is successful and the unrecovered dispatch is sent to the field processing, the restored dispatch can be filed and finished;

310) initiating a field processing flow; when the field processing is completed, field feedback is performed and step 309) is entered.

2. The remote diagnosis method based on the voltage current class metering abnormity according to the claim 1, characterized in that: in step 301), the load data of the electric meter is called, if the load data is abnormal, whether the load data is cleared or not is checked, if the load data is abnormal, whether the abnormality is recovered or not is further judged, and the unrecovered electric meter is dispatched to a site for processing; and issuing a measuring point parameter re-projection task without resetting the load data, restoring to be filed, dispatching the unrecovered load data to a field for processing, and restoring to be filed.

3. The remote diagnosis method based on the voltage current class metering abnormity according to claim 2, characterized by comprising the following steps: in step 301), calling and testing self data and meter data of the terminal; comparing self data of the calling and testing terminal with meter data, if the terminal data is normal, primarily judging the terminal data to be a wiring problem or a meter problem, dispatching to a field for processing and checking, and if the terminal data is the wiring or meter problem, performing field adjustment; archiving after processing and recovery; .

4. The remote diagnosis method based on the voltage current class metering abnormity according to the claim 1, characterized in that: in step 302), checking the voltage and current changes at the same point when judging whether the voltage and current changes at the same point are related; if the voltage of the three phases changes current obviously along with the three-phase balance condition, the phase voltage with large current is reduced obviously, and the phase voltage with small current is increased obviously, the suspected neutral point drift is judged to cause the three-phase voltage difference, a special inspection process is initiated, and basic judgment is remarked; if the voltage is found to be normal sometimes and low sometimes, the voltage loop is judged to be in poor contact and unstable in voltage, and the voltage loss starting time and the recovery time can be called, or when the voltage is low and not recovered to be normal, the voltage is recovered to be normal and stable by carrying out measurement loop reconstruction after the field inspection.

5. The remote diagnosis method based on the voltage current class metering abnormity according to the claim 1, characterized in that: in step 303), checking for a loss of voltage phase change; if the voltage of the voltage loss phase is gradually reduced, the situation that a primary side fuse of the voltage transformer is fused, or a voltage sampling line of the current transformer is fused due to overheating or other voltage connectivity faults is judged; .

6. The remote diagnosis method based on the voltage current class metering abnormity according to claim 5, characterized in that: in step 304), looking for a no-voltage phase current change; if the current data of the voltage-loss phase is obviously reduced compared with the data before voltage loss, the fault of the primary side of the power supply is judged to be possible, the drop-out fuse wire is fused or the fault of low voltage of the high-voltage line is possible.

7. The remote diagnosis method based on the voltage current class metering abnormity according to the claim 1, characterized in that: the method also comprises a preparation step, wherein the preparation step is used for establishing a voltage and current metering abnormity diagnosis calculation model; and the remote master station analyzes and judges according to the voltage and current measurement abnormity diagnosis and calculation model.

8. The remote diagnosis method based on the voltage current class metering abnormity according to claim 7, characterized in that: the voltage and current metering abnormity diagnosis and calculation model comprises a voltage open-phase diagnosis model used for diagnosing whether the voltage open-phase exists or not; the diagnosis method comprises the following steps:

A) three-phase three-wire phase loss: any phase voltage in the AC phase is less than K reference voltage, and the other phase voltage is not less than K reference voltage; k is a coefficient;

B) three-phase four-wire phase loss: any phase voltage is less than K reference voltage, and any phase voltage in the other two phases of voltages is not less than K reference voltage; k is a coefficient;

C) monitoring a plurality of points in one day; if the electric energy meter or the terminal is monitored to have a voltage phase failure event at the same time, generating voltage phase failure abnormity immediately, otherwise, generating abnormity when the data diagnosis requirement is met for 3 consecutive days.

9. The remote diagnosis method based on the voltage current class metering abnormity according to the claim 8, characterized in that: in step c), 3 points need to be monitored in one day; k is 60%.

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