CN105576661B - A method of for judging that power distribution line maintenance is stopped transport - Google Patents

Abstract

The invention belongs to the field of operation and maintenance of distribution network lines, and in particular relates to a method for judging distribution line maintenance outage, the method includes remote signaling signal pre-judgment, telemetry data judgment, maintenance plan judgment, outage times and duration calculation and The calculation of outage rate availability consists of five parts; this method calculates and makes calculations through the switch remote signaling signal associated with the distribution line, the protection action remote signaling signal, and the current telemetry data of the line, combined with the maintenance plan or maintenance ticket associated with the line. Comprehensive judgment of maintenance and outage; this method is convenient for timely control of distribution network line maintenance and outage, and can assist in the production, operation, maintenance and maintenance of distribution network in a targeted manner, thereby further improving the availability of distribution network lines.

Description

A method for judging the outage of power distribution lines for maintenance

technical field

The invention belongs to the field of operation and maintenance of distribution network lines, and in particular relates to a method for judging the maintenance and outage of distribution lines.

Background technique

With the implementation of the "overhaul" management system of the State Grid Corporation and the implementation of the document spirit of grasping the "weak links at both ends", each power company requires the power grid inspection department to fully control the production situation of the power grid under its jurisdiction and the production situation of the county company, which is more precise Carry out production, operation, maintenance and repair work in a flat and lean manner; however, in actual work, each power company has insufficient control over the maintenance and outage of all lines within the jurisdiction of the power grid, especially distribution lines.

Due to the hierarchical management of regulation and control, the control centers at all levels generally only report the maintenance and outage situation of the line mastered by the control center at the same level to the transportation inspection department. , especially the province's distribution line maintenance and outage situation is basically unclear, and there is also a lack of effective technical means. sex.

To sum up, in order to realize the overall control of the production situation of the distribution network, and carry out the production operation and maintenance work in a more precise, flat and lean manner, it is very urgent to study a method for judging the outage of the distribution line. , so that it can assist in the production, operation, maintenance and maintenance of the distribution network in a targeted manner.

At present, manufacturers in the power industry on the market have also conducted some research on the maintenance and outage of distribution lines, but there is no mature or public clear algorithm. Therefore, it is necessary to research and develop a calculation method for the maintenance and outage of distribution lines , so that it can meet the judgment requirements of distribution line maintenance and outage; and it needs to meet the requirements of less system resource occupation, low CPU and memory requirements, and support for automatic and manual calculations during the calculation process.

Contents of the invention

The main purpose of the present invention is to provide a method for judging the maintenance and outage of distribution lines, so as to meet the judgment requirements of distribution line maintenance and outage, achieve the effect of timely and accurate judgment, and solve the situation of distribution network maintenance and outage Problems that are difficult to control in time.

In order to solve the above problems, the present invention provides a method for judging the outage of power distribution lines. The method includes remote signaling signal prediction, telemetry data judgment, maintenance plan judgment, outage times and duration calculation, and outage rate availability Calculate five parts;

Among them, the remote signaling signal mainly includes two parts: the switch opening and closing signal and the protection action signal; the telemetry data mainly includes the current monitoring value of the distribution line, and its current is divided into A-phase current, B-phase current, and C-phase current; the maintenance plan includes power distribution There are two types of line daily maintenance plans and distribution line maintenance tickets; the outage duration calculation refers to the time from the determined start time to the cut-off time of the distribution line maintenance outage, in seconds; signal, protection action signal and current telemetry data of the distribution line, combined with the maintenance plan or maintenance ticket of the distribution line to make a comprehensive judgment on the maintenance and outage of the distribution line;

Among them, the pre-judgment of the remote signaling signal means that there is switch position (opening and closing) data of "opening" at a certain point in time, and within 1 minute at this point in time, there is corresponding protection action data (any one on the line) The data of the protection action measuring point), then firstly judge the line as a general trip, as an auxiliary condition for the judgment of maintenance outage, so that subsequent further judgments can be made based on the telemetry current value of the line;

Among them, the judgment of telemetry data is based on the general trip, judging whether the current value of the line at two consecutive points before this is less than the threshold value, and at the same time there is "closing" data within 15 minutes before that and the last state If it is established, it is determined that the line is a transmission test operation for maintenance and outage; or the current value of the two points before this line is greater than the threshold value, with this point as the center, the current values of the two points before and after Whether the current is less than the threshold value, if it is true, it is also determined that the line is a transmission test operation for maintenance outage; both are determined as distribution line maintenance outage;

And, on the basis of satisfying the transmission test carried out by the above maintenance outage, continue to analyze that there is "closing" data within 5 seconds before that, and the final state of the switch is "closing". If it is satisfied, the line is judged as maintenance The trial power transmission operation carried out by outage shall be judged as outage for maintenance of distribution lines;

Among them, the judgment of the maintenance plan mentioned above is based on the general trip. If the time point of the line trip is within the start time and completion time of the associated maintenance plan or maintenance ticket, it is also determined that the distribution line is a maintenance Outage;

In addition, the number of maintenance outages refers to the sum of the number of maintenance outages that occurred within a certain period of time, and the unit is "times";

The maintenance outage duration refers to the total time of maintenance outages that occurred within the statistical time, the unit is "seconds";

Line outage rate = (outage number/(line kilometers/100))*365 days/statistical days, unit "times/100km.year";

Line availability factor=100%*(1-total outage duration/(number of lines*24 hours*days)), unit "%".

A method for judging the maintenance and outage of a distribution line provided above is to use the switch remote signaling signal associated with the distribution line, the protection action remote signaling signal, and the current telemetry data of the line in combination with the maintenance plan associated with the line or The maintenance ticket is calculated and the comprehensive judgment of maintenance outage is made. This method facilitates timely control of the maintenance and outage of distribution network lines, and can assist in the production, operation, maintenance and maintenance of distribution network in a targeted manner, thereby further improving the availability of distribution network lines.

Moreover, the method for maintenance and outage of power distribution lines of the present invention only needs to occupy very small system resources during program operation, has low requirements for CPU and memory, and can be set to automatic calculation and manual calculation.

Description of drawings

Fig. 1 is a composition diagram of a method for judging distribution line maintenance outage according to the present invention;

Fig. 2 is a calculation flow chart of a method for judging a power distribution line outage for maintenance according to the present invention.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. The following implementation examples are used to illustrate the present invention, but are not used to limit the scope of the present invention.

Fig. 1 shows a composition structure diagram of a method for judging distribution line maintenance and outage according to the present invention, and Fig. 2 is a calculation flow for judging distribution line maintenance and outage method according to the present invention Fig. 1 represents a preferred implementation example of a method for judging distribution line maintenance outage involved in the present invention. According to this implementation example, it includes five parts, including remote signaling signal prediction, telemetry data determination, maintenance plan determination, outage times and duration calculation, and outage rate availability calculation, and is implemented through the following steps.

Step 1: Pre-judgment by remote signaling signal:

The switch remote signaling signal of the distribution line has the switch position (opening and closing) data of "opening" at a certain point in time, and within 1 minute at this point in time, there is corresponding protection action data (any The data of a protection action measuring point), that is, it is predicted that the distribution line is a general trip, which is used as an auxiliary condition for the judgment of maintenance outage, so that subsequent follow-up can be carried out based on the telemetry current value of the line or the maintenance plan and maintenance ticket information. further judgment.

Step 2: Judgment of transmission test for maintenance outage based on telemetry data:

If any of the following conditions is met, it is judged as a transmission test operation for maintenance outage.

2.1. If the current at the first two points is less than the threshold value (threshold value of the line is 1A), it is judged as a transmission test;

2.2. When judging the trip, if one of the currents of the first two points is greater than the threshold value (the threshold value of the line is 1A), then judge whether the current of the two points before and after this point as the center is less than the threshold value. If it is less than the threshold value, it is the transmission test, otherwise not;

The above two categories are judged as outage for maintenance.

Step 3: Judgment of trial power transmission for maintenance outage based on telemetry data:

On the basis of step 2, analyze the opening and closing of the switch within 5 seconds of the transmission test, if the final state is closed, and there is a signal of closing the switch within the first five seconds. Then it is judged as the test delivery point operation carried out by the maintenance outage; it is also judged as the maintenance outage.

Step 4: Judging by the maintenance plan or maintenance ticket:

On the basis of the general trip predicted in step 1, if the time point of the general trip predicted by the line is within the start time and completion time of the associated maintenance plan or maintenance ticket, it is also determined that the distribution line is Maintenance outage.

Step 5: Calculate the number and duration of line maintenance outages:

The number of maintenance outages = the sum of the number of maintenance outages that occurred within a certain period of time, the unit is "times"; the length of maintenance outages = the total length of maintenance outages that occurred within the statistical period, the unit is "seconds". Among them, the length of maintenance outage needs to be comprehensively calculated in combination with the switch protection action signal and current data. The specific calculation process is as follows:

1) Normal calculation

A． After the current recovery at the nearest point after the maintenance outage (within 1 day), the latest switch is taken as the recovery time - the occurrence time of the maintenance outage = the length of the outage.

B. Calculate the time of the first current recovery within 15 days, and take the latest switch closing time before the first current recovery time, then this time - the time when the maintenance outage occurs = the length of the outage.

C. If there is no switch-on time, then the first current recovery time - maintenance outage occurrence time = recovery time.

2) If reclosing is unsuccessful and the recovery time is less than 30 seconds

Recovery time = reclosing time - maintenance outage occurrence time.

3) If the reclosing is successful and the recovery time is very long, the following rules are used for calculation:

A. After the current recovery at the nearest point after the maintenance outage (within 1 day), take the nearest switch as the recovery time - the occurrence time of the maintenance outage = the length of the outage

B． Calculate the time of the first current recovery within 15 days, and take the latest switch-on time before the first current recovery time, then this time - the time when the maintenance outage occurs = the length of the outage.

C． If there is no switch closing time, then the first current recovery time - the occurrence time of maintenance outage = outage duration.

Step 6: Calculate line maintenance outage rate and availability:

Line outage rate = (outage times/(line kilometers/100))*365 days/statistical days, unit "times/100km.year"; line availability factor=100%*(1-total outage duration/ (Number of lines * 24 hours * days)), the unit is "%".

So far, the method has been implemented. The above is only a preferred implementation method of the present invention. It should be pointed out that for those of ordinary skill in the art, they can also do Several improvements and modifications are made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Finally, it should be noted that: the above implementation examples are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing implementation examples, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing implementation examples, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various implementation examples of the present invention.

Claims (2)

1. A method for judging the outage of power distribution line maintenance, characterized in that the method includes five parts: remote signaling signal prediction, telemetry data judgment, maintenance plan judgment, outage times and duration calculation, and outage rate availability calculation composition; Among them, the remote signaling signal includes two parts: the switch opening and closing signal and the protection action signal; the telemetry data includes the current monitoring value of the distribution line, and its current is divided into A-phase current, B-phase current, and C-phase current; the maintenance plan includes distribution line daily There are two types of maintenance plans and distribution line maintenance tickets; the outage duration calculation refers to the time from the determined start time to the cut-off time of the distribution line maintenance outage, in seconds; through the remote signal of the switch associated with the distribution line, The protection action signal and the current telemetry data of the distribution line are combined with the maintenance plan or maintenance ticket of the distribution line to make a comprehensive judgment on the maintenance and outage of the distribution line; Among them, the pre-judgment of the remote signal signal means that at a certain point in time, there is the switch position opening and closing data of "opening", and within 1 minute at the point in time, there is corresponding protection action data, and any protection action on the line For the data of the measuring point, the line is first predicted to be a general trip, as an auxiliary condition for the judgment of the maintenance outage, so that subsequent further judgments can be made based on the telemetry current value of the line; Among them, the judgment of telemetry data is based on the general trip, judging whether the current value of the line at two consecutive points before this is less than the threshold value, and at the same time there is "closing" data within 15 minutes before that and the last state If it is established, it is determined that the line is a transmission test operation for maintenance and outage; or the current value of the two points before this line is greater than the threshold value, with this point as the center, the current values of the two points before and after Whether the current is less than the threshold value, if it is true, it is also determined that the line is a transmission test operation for maintenance outage; both are determined as distribution line maintenance outage; And, on the basis of satisfying the transmission test carried out by the above maintenance outage, continue to analyze that there is "closing" data within 5 seconds before that, and the final state of the switch is "closing". If it is satisfied, the line is judged as maintenance The trial power transmission operation carried out by outage shall be judged as outage for maintenance of distribution lines; Among them, the judgment of the maintenance plan mentioned above is based on the general trip. If the time point of the line trip is within the start time and completion time of the associated maintenance plan or maintenance ticket, it is also determined that the distribution line is a maintenance Outage; In addition, the number of maintenance outages refers to the sum of the number of maintenance outages that occurred within a certain period of time, and the unit is "times"; The maintenance outage duration refers to the total time of maintenance outages that occurred within the statistical time, the unit is "seconds"; Line outage rate = (number of outages/(line kilometers/100))*365 days/statistical days, unit "times/100 kilometers per year"; Line availability factor=100%*(1-total outage duration/(number of lines*24 hours*days)), unit "%". 2. A method for judging distribution line maintenance outage according to claim 1, characterized in that: the method also includes the following detailed judging steps: Step 1: Pre-judgment by remote signaling signal: The switch remote signaling signal of the distribution line has the switch position opening and closing data of "opening" at a certain point in time, and within 1 minute at the point in time, there is corresponding protection action data, any protection on the line The data of the action measurement point, that is, the prediction that the distribution line is a general trip, is used as an auxiliary condition for the judgment of the maintenance outage, so that subsequent further judgments can be made based on the telemetry current value of the line or the maintenance plan and maintenance ticket information ; Step 2: Judgment of transmission test for maintenance outage based on telemetry data: If any of the following conditions is met, it is judged as a transmission test operation for maintenance outage; 2.1. The determination of telemetry data is based on general tripping, and it is judged whether the current value of the line at two consecutive points before that is less than the threshold value. If the current at the first two points is less than the threshold value, the line threshold value is 1A , it is judged as a transmission test; 2.2. The determination of telemetry data is based on general tripping, and it is judged whether the current value of two consecutive points before the line is less than the threshold value. The threshold value is 1A, then judge whether the current of the two points before and after this point as the center is less than the threshold value, if it is less than the threshold value, it is a transmission test, otherwise it is not a transmission test; The above two categories are all judged as outage for maintenance; Step 3: Judgment of trial power transmission for maintenance outage based on telemetry data: On the basis of step 2, analyze the opening and closing of the switch within 5 seconds of the transmission test. If it is finally in the closing state and there is a signal of the switch closing within the first five seconds; then it is judged as a maintenance outage Trial delivery point operation; also judged as outage for maintenance; Step 4: Judging by the maintenance plan or maintenance ticket: On the basis of the general trip predicted in step 1, if the time point of the general trip predicted by the line is within the start time and completion time of the associated maintenance plan or maintenance ticket, it is also determined that the distribution line is outage for maintenance; Step 5: Calculate the number and duration of line maintenance outages: The number of maintenance outages = the sum of the number of maintenance outages that occurred within a certain period of time, the unit is "times"; the length of maintenance outages = the total length of the maintenance outages that occurred within the statistical period, the unit is "seconds"; , the maintenance outage time needs to be comprehensively calculated in combination with the switch protection action signal and current data. The specific calculation process is as follows: 1) Normal calculation A． After the current recovery at the nearest point after the maintenance outage, within 1 day, the nearest switch is taken as the recovery time - the occurrence time of the maintenance outage = the length of the outage; B. Calculate the first current recovery time within 15 days, and take the latest switch closing time before the first current recovery time, then this time - maintenance outage occurrence time = outage duration; C. If there is no switch closing time, then the first current recovery time - maintenance outage occurrence time = recovery time; 2) If reclosing is unsuccessful and the recovery time is less than 30 seconds Recovery time = reclosing time - maintenance outage occurrence time; 3) If the reclosing is successful and the recovery time is very long, the following types of rules are used for calculation: A. After the current recovery at the nearest point after the maintenance outage, within 1 day, the nearest switch is taken as the recovery time - the occurrence time of the maintenance outage = the length of the outage; B． Calculate the first current recovery time within 15 days, and take the latest switch closing time before the first current recovery time, then this time - maintenance outage occurrence time = outage duration; C． If there is no switch closing time, then the first current recovery time - maintenance outage occurrence time = outage duration; Step 6: Calculate line maintenance outage rate and availability: Line outage rate = (number of outages/(line kilometers/100))*365 days/statistical days, unit "times/100 kilometers per year"; Line availability factor=100%*(1-total outage duration/(number of lines*24 hours*days)), unit "%".