CN110212523B - Method for detecting power relation of two-way power supply mode in line loss - Google Patents
Method for detecting power relation of two-way power supply mode in line loss Download PDFInfo
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- CN110212523B CN110212523B CN201910491671.5A CN201910491671A CN110212523B CN 110212523 B CN110212523 B CN 110212523B CN 201910491671 A CN201910491671 A CN 201910491671A CN 110212523 B CN110212523 B CN 110212523B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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Abstract
The invention discloses a method for detecting the relation of a double-path power supply mode power supply in line lossN, extracting N users from the total M users in a mode of iteratively returning subsequence items, and sharing the total M users without repeated sampling
A seed probability; exchanging electricity sales quantities aiming at each interchange condition, calculating a first line loss value and a second line loss value after interchange, and finally screening and recording the interchange conditions with qualified line loss; the user scope that needs the check of judgement that can be accurate has greatly reduced the outwork and has checked work load, if the interchange condition is the only solution, does not need the outwork to check even and can confirm the exact two-way power relation.
Description
Technical Field
The invention belongs to the technical field of line loss detection of an electric network, and particularly relates to a method for detecting a power relation of a double-path power supply mode in line loss.
Background
The double-way power supply is that the power supply bureau is connected to some important high-voltage user from two areas by two lines, and the purpose is that one power supply is immediately supplied by the other power supply in case of failure. For example, a stadium and the like all require two paths of power supply, and some power generation equipment even are self-provided to prevent power failure in a match.
The line loss is calculated according to the electric energy meter index and is the difference value between the power supply quantity and the electricity selling quantity, the power supply quantity is the actual power supply quantity of the power company, and the electricity selling quantity is the electricity meter reading used for the electricity meter; the line loss rate calculation formula is as follows:
line loss rate (power supply amount-power selling amount)/power supply amount × 100%;
in the current two-way power supply mode, the determination of the power supply relationship mainly depends on checking the number of an electric meter on site and manually determining the trial calculation of the two-way electricity quantity; in the process of analyzing the cause of line loss, the condition that the relationship between a user with double-path power supply and a user with double-path power supply is wrong often occurs. The situation can cause the problem that the total loss of two lines is qualified, but the loss of a single line is unqualified. The system needs to rely on the on-duty manual one-by-one analysis or the on-duty one-by-one check; a great deal of effort is required.
Disclosure of Invention
The invention aims to provide a method for detecting a power relation in a line loss two-way power supply mode, which aims to solve the problem that in the existing line loss analysis process, workers check the power relation one by one; the invention can more quickly and accurately find the problem of unqualified single-path line loss caused by the wrong relation of one-path power supply and two-path power supply.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for detecting the power relation of the two-way power supply mode in line loss comprises the following steps:
step one, acquiring input electric quantity on a two-path power supply to be detected and electric quantity sold by all users from a database through a computer;
step two, setting the number N of users exchanging a two-way power supply;
step three, judging whether N is larger than the total number M of all users on the two paths of power supplies to be detected, which is acquired in the step one; if yes, jumping to the step two, and modifying the value of N; if not, jumping to the fourth step;
step four, extracting N households from the total M households without repeated sampling
The results of the seed interchange;
step five, taking the 1 st interchange result, exchanging the electricity selling quantity, and calculating the first route loss and the second route loss after interchange;
step six, judging whether the first and second route losses calculated in the step five meet the requirements or not; if the conversion result meets the requirement, recording the conversion result, and jumping to the seventh step; if the conversion result does not meet the requirement, the conversion result is not recorded, and the step seven is skipped;
step seven, judging whether all interchange results are traversed or not; if not, taking down an interchange result, calculating the loss of the first route and the second route at the moment, and then jumping to the sixth step to continue judging; if yes, the interchange results of all records are output.
Further, the method also comprises the following steps: and step eight, checking the corresponding user in the interchange result according to all the output interchange results, confirming that the actual information of the user is wrong with the recorded information of the database, and modifying the information of a two-way power supply of the corresponding user in the database.
Further, N is more than or equal to 1 and less than or equal to M.
Further, the value of N is taken from 1 for the first time, and the steps from one to seven are repeated once; then, the value of N is adjusted once, and the steps one to seven are repeated once again until N is equal to M.
Further, N is adjusted by 1 at a time.
Further, the interchange results of all secondary output records are taken, the users in intersection are taken for checking, and whether the actual information of the users is wrong with the record information of the database is judged.
Further, in the sixth step, if the line loss rate is less than or equal to 6% after the interchange, the standard is met; otherwise, the specification is not met.
Further, the device is used for users with the power supply voltage level of 10kV or above.
Compared with the prior art, the invention has the following beneficial effects:
the invention deeply studies the management flow of the line loss, starts from the core difficulty of trial calculation analysis, and has the technical key point that the automatic electric quantity pair harmonic and interchange result trial calculation is carried out aiming at a double-path power supply user through programming so as to achieve the effect of determining the power relation of a double-path power supply line.
The invention determines the possible power supply relationship interchange condition by analysis, thereby greatly reducing the workload of the outwork check.
The invention can quickly detect and analyze the feedback result of the power supply relationship of the outworker construction team.
The invention can calculate the unique solution of the interchange condition by integrating multi-month data, and can determine the correct two-way power relation without the need of outwork check.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method for detecting a power relationship in a line loss in a two-way power supply system according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Referring to fig. 1, the present invention provides a method for detecting a power relationship in a two-way power supply manner, which specifically includes the following steps:
step one, acquiring all users on a to-be-detected two-way power supply, input electric quantity of the to-be-detected two-way power supply and selling electric quantity of each user from an electric power system database through a computer;
inputting the number N of users needing to exchange two power supplies; n is a positive integer, the value of N is taken according to experience, the smaller the value is, the more accurate the value is, and N can be gradually increased from 1 to M in the actual detection process;
step three, judging whether the number N of the users exchanging the input two paths of power supplies is larger than the number M of all the users on the two paths of power supplies to be detected, which is acquired in the step one; if yes, jumping to the step two, and modifying the value of N; if not, jumping to the fourth step;
step four, extracting N users from the total M users in a mode of iteratively returning subsequence items, wherein the N users are not repeatedly sampled and share
The possibility of interchanging results;
step five, taking the 1 st interchange result, exchanging the electricity selling quantity, and calculating the first route loss and the second route loss after interchange;
step six, judging whether the first and second route losses calculated in the step five meet the requirements or not; if the requirement is met, outputting the result and recording, and jumping to the seventh step; if the result does not meet the requirement, the result is not recorded, and the step seven is skipped; meeting the requirement, namely after the extracted N households are subjected to two-way power supply interchange, controlling the line loss/line loss rate to be within the range of 0-6% of the specification;
step seven, judging whether all interchange results are traversed or not; if not, taking down an interchange result, calculating the loss of the first route and the second route at the moment, and then jumping to the sixth step to continue judging; if yes, the interchange results of all records are output.
And according to the interchange results of all records, manually checking on the spot to confirm that the actual information is wrong, and modifying the information of the two-way power supply of the corresponding user in the database after confirmation to make the information matched with the actual information.
The invention fully utilizes the data collected by each platform, exchanges the first and second electricity quantities of all two paths of power supply users on the circuit through an automatic programming algorithm, then screens the exchange result, and rejects the result which does not meet the line loss requirement so as to help detect the first and second power supply information in the database and the user information which is not matched with the actual condition.
The line loss is calculated by (sum of input power and sold power)/input power. In order to determine the relationship between a two-way power supply and a two-way power supply of a two-way power supply user, the invention firstly needs toObtaining input electric quantity and selling electric quantity of a two-way cable from original data, then determining the number N of users needing to be exchanged, extracting N users from the total M users in a mode of iteratively returning subsequence items, and sharing the total M users without repeated sampling
And (4) possibility. And exchanging the electricity selling quantity aiming at each interchange condition, and calculating a first route loss value and a second route loss value after interchange. And finally, screening and recording the interchange condition of the qualified line loss.
The invention analyzes the big data by integrating the electric quantity for many months, can screen by depending on the natural change of the internal load of the user, can reduce the interchange result in a minimum range under the condition of enough big data samples, achieves the effect of completing the analysis and calculation of the line loss by depending on the data analysis, fully exerts the implicit value of a large amount of data, and realizes the lean and scientific management of the line loss.
The invention is applied to the determination of the relation of the power supplies in a double-circuit power supply mode with 84-path 10kV branch line loss for testing, and relates to 656 high-rise buildings and transformer areas, and 72 wrong double-circuit power supply relations are successfully determined and corrected. The method successfully helps the loss qualification rate of the 10kV branching cable line in the area to be improved from 79% to 87%, and achieves remarkable practical effect.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (8)
1. The method for detecting the power relation of the two-way power supply mode in line loss is characterized by comprising the following steps of:
step one, acquiring input electric quantity on a two-path power supply to be detected and electric quantity sold by all users from a database through a computer;
step two, setting the number N of users exchanging a two-way power supply;
step three, judging whether N is larger than the total number M of all users on the two paths of power supplies to be detected, which is acquired in the step one; if yes, jumping to the step two, and modifying the value of N; if not, jumping to the fourth step;
step four, extracting N households from the total M households without repeated sampling
The results of the seed interchange;
step five, taking the 1 st interchange result, exchanging the electricity selling quantity, and calculating the first route loss and the second route loss after interchange;
step six, judging whether the first and second route losses calculated in the step five meet the requirements or not; if the conversion result meets the requirement, recording the conversion result, and jumping to the seventh step; if the conversion result does not meet the requirement, the conversion result is not recorded, and the step seven is skipped;
step seven, judging whether all interchange results are traversed or not; if not, taking down an interchange result, calculating the loss of the first route and the second route at the moment, and then jumping to the sixth step to continue judging; if yes, the interchange results of all records are output.
2. The method for detecting the line loss double-circuit power supply mode power relation according to claim 1, further comprising: and step eight, checking the corresponding user in the interchange result according to all the output interchange results, confirming that the actual information of the user is wrong with the recorded information of the database, and modifying the information of a two-way power supply of the corresponding user in the database.
3. The method for detecting the line loss two-way power supply mode power relation as claimed in claim 1, wherein N is greater than or equal to 1 and less than or equal to M.
4. The method for detecting the line loss intermediate double-circuit power supply mode power supply relationship according to claim 1, wherein N is taken from 1 for the first time, and the steps from one to seven are repeated once; then, the value of N is adjusted once, and the steps one to seven are repeated once again until N is equal to M.
5. The method for detecting the relation between the line loss and the double-circuit power supply mode power supplies according to claim 4, wherein N is adjusted by 1 each time.
6. The method for detecting the relationship between the line loss and the power supply in the two-way power supply mode according to claim 4, wherein the interchange results of all the secondary output records are taken, the intersection users are taken for inspection, and whether the actual information of the users is wrong with the recorded information of the database is judged.
7. The method for detecting the relation between the line loss and the power supplies in the two-way power supply mode according to claim 4, wherein in the sixth step, if the line loss rate is less than or equal to 6 percent after the exchange, the line loss rate meets the specification; otherwise, the specification is not met.
8. The method for detecting the relation between the line loss and the double-circuit power supply mode power supplies according to claim 1, wherein the user is a user with a power supply voltage level of 10kV or more.
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| EP2406778A4 (en) * | 2009-03-11 | 2014-06-25 | Trilliant Networks Inc | Process, device and system for mapping transformers to meters and locating non-technical line losses |
| CN102801208B (en) * | 2012-08-31 | 2015-01-14 | 安徽新迪机电科技有限责任公司 | Multi-path power supply intelligent scheduling manager and control method thereof |
| CN105449663A (en) * | 2014-08-12 | 2016-03-30 | 国家电网公司 | Method and device for acquiring network loss rate of distribution network load node |
| CN107247194B (en) * | 2017-07-17 | 2020-04-14 | 国网江西省电力公司电力科学研究院 | Method and device for detecting phase modulation effect of unbalanced transformer area |
| CN108009940A (en) * | 2017-11-10 | 2018-05-08 | 国网浙江省电力公司电力科学研究院 | Same period line loss exception analysis method and system based on Tableau |
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