CN115239180A - Line loss evaluation method, device, equipment and storage medium - Google Patents
Line loss evaluation method, device, equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a line loss evaluation method, a line loss evaluation device, line loss evaluation equipment and a storage medium, wherein the method comprises the following steps: the method comprises the steps of obtaining historical line loss data, dividing the historical line loss data into a plurality of intervals according to different division types, combining the intervals to obtain a plurality of interval combinations, determining scores in a plurality of continuous statistical periods aiming at each interval combination to obtain a line loss grading table, calculating a power transmission interval to be evaluated, presetting a target line loss in a period, and searching corresponding scores from the line loss grading table based on the target line loss. According to the invention, the historical line loss data of the line and the transformer area of 10kV or below are fully acquired, a new line loss evaluation standard is reconstructed based on the historical line loss data, the interference of high loss statistical results caused by different loads of the line or the transformer area is avoided, the deviation caused by adopting a theoretical line loss calculation mode is avoided, the default power consumption and the power stealing are more accurately struck, the accuracy of line loss evaluation is improved, the loss-reducing responsibility fields of all specialties are cleared, and the accuracy of line loss evaluation is improved.
Description
Technical Field
The present invention relates to power technologies, and in particular, to a line loss evaluation method, apparatus, device, and storage medium.
Background
The line loss rate is a comprehensive index for measuring the economic operation management level of a power grid and the economic benefit of a power supply enterprise, and is directly related to the operation capacity and the economic source of the power enterprise. Line loss control, especially line loss control of 10kV and below distribution networks, is an important means for improving power utilization ecology and improving economic benefits of power supply enterprises at present, and control of 10kV lines with high line loss and 0.4kV transformer areas is the most important factor in loss control work.
At present, the following limitations exist in the line loss statistics, analysis and evaluation modes of 10kV and the following power grids: firstly, only monitor 10kV circuit, 0.4kV platform district line loss rate index, mainly reflect indexes such as ground line loss abnormal rate or line loss qualification rate, receive the different high-loss statistical result interference that cause of circuit or platform district load easily, increase manual analysis administrative cost, cause because of the little big management consequence that loses. And secondly, line loss rate indexes are mainly formulated according to theoretical line loss calculation results at present, although line loss theoretical calculation technologies are mature day by day, practical limitations are still high, and if a line is influenced by inaccurate basic parameters of equipment, difficult voltage selection at the tail end of a transformer area, workload and the like, a reasonable theoretical line loss reference value is difficult to obtain. All the reasons can lead to inaccurate line loss evaluation. Thirdly, in daily line loss management, even if line and station area indexes are decomposed into people, the line loss assessment is unfair and the effect of loss reduction competition of the same platform is lost due to the problems of different management areas, unreasonable line loss rate indexes and the like, and the enthusiasm of people responsible for line loss is struck. And fourthly, line loss statistics is still carried out by using the power supply and power sale quantities (line loss rate = line loss quantity/power supply quantity, line loss quantity = power supply quantity-power sale quantity), the calculated line loss quantity is abnormal and wide, circuits and distribution areas with high real line loss are difficult to be exposed and managed in a more targeted manner, and the power loss loophole is difficult to be blocked more accurately.
Disclosure of Invention
The invention provides a line loss evaluation method, a line loss evaluation device, line loss evaluation equipment and a storage medium, which are used for improving the accuracy of line loss evaluation.
In a first aspect, the present invention provides a line loss evaluation method, including:
obtaining historical line loss data;
dividing the historical line loss data into a plurality of intervals according to different division types, and combining the intervals to obtain a plurality of interval combinations;
determining scores in a plurality of different statistical periods according to each interval combination to obtain a line loss score table;
calculating a power transmission interval to be evaluated, and presetting target line loss in a period;
and searching the corresponding score from the line loss score table based on the target line loss.
Optionally, the obtaining of the historical line loss data includes:
obtaining the historical line loss rate and the historical loss electric quantity of the feeder line from a metering acquisition system or a marketing electricity utilization information management system;
acquiring the length of the feeder line from a power distribution network management system;
and acquiring the running time of the distribution transformer under the feeder from a metering acquisition system, a marketing electricity consumption information management system or a distribution network management system.
Optionally, the historical line loss data is divided into a plurality of intervals according to different division types, and the intervals are combined to obtain a plurality of interval combinations, where the interval combinations include:
dividing the historical line loss rate into a plurality of intervals according to the power supply quantity grade and the feeder line length grade, and combining the intervals to obtain a plurality of interval combinations;
and dividing the historical loss electric quantity into a plurality of intervals according to the power supply quantity grade and the feeder line length grade, and combining the intervals to obtain a plurality of interval combinations.
Optionally, the obtaining of the historical line loss data includes:
acquiring historical line loss rate, historical loss electric quantity and operation duration of a distribution transformer area from a metering acquisition system or a marketing electricity consumption information management system;
and acquiring the capacity of the distribution transformer area from a metering acquisition system, a marketing electricity utilization information management system or a distribution network management system.
Optionally, the historical line loss data is divided into a plurality of intervals according to different division types, and the intervals are combined to obtain a plurality of interval combinations, including:
dividing the historical line loss rate into a plurality of intervals according to the capacity grade and the power supply quantity grade, and combining the intervals to obtain a plurality of interval combinations;
and dividing the historical loss electric quantity into a plurality of sections according to the capacity grade and the power supply quantity grade, and combining the sections to obtain a plurality of section combinations.
Optionally, calculating a power transmission interval to be evaluated, and calculating a target line loss in a preset period, the method includes:
calculating the difference value between the power supply quantity and the electricity selling quantity of the feeder line in the power transmission section to be evaluated aiming at the feeder line to obtain a first numerical value;
calculating the no-load power loss of the distribution transformer in the power transmission interval to be evaluated;
calculating a difference value between the first numerical value and the no-load power loss to obtain the power loss of the feeder line;
and calculating the quotient of the loss electric quantity of the feeder line and the power supply quantity to obtain a target line loss rate of the power transmission section to be evaluated.
Optionally, calculating a power transmission interval to be evaluated, and calculating a target line loss in a preset period, the method includes:
calculating the difference value between the power supply quantity and the electricity selling quantity of the distribution transformer area of the power transmission area to be evaluated aiming at the distribution transformer area to obtain a second numerical value;
calculating the sum of the inherent loss electric quantity of the metering device and the inherent loss electric quantity of the low-voltage power distribution cabinet in the power transmission interval to be evaluated to obtain a third numerical value;
calculating the difference between the second value and the third value to obtain the loss electric quantity of the distribution transformer area;
and calculating the quotient of the loss electric quantity of the distribution transformer area and the power supply quantity to obtain the target line loss rate of the power transmission area to be evaluated.
In a second aspect, the present invention further provides a line loss evaluation apparatus, including:
the data acquisition module is used for acquiring historical line loss data;
the interval combination module is used for dividing the historical line loss data into a plurality of intervals according to different division types and combining the intervals to obtain a plurality of interval combinations;
a scoring table determining module for determining, for each interval combination, determining scores in a plurality of different statistical periods to obtain a line loss score table;
the target line loss calculation module is used for calculating the target line loss in a preset period of the power transmission interval to be evaluated;
and the scoring module is used for searching corresponding scores from the line loss scoring table based on the target line loss.
In a third aspect, the present invention also provides a computer device, including:
one or more processors;
a memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the line loss evaluation method as provided by the first aspect of the present invention.
In a fourth aspect, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the line loss evaluation method according to the first aspect of the present invention.
The line loss evaluation method provided by the invention comprises the following steps: the method comprises the steps of obtaining historical line loss data, dividing the historical line loss data into a plurality of sections according to different division types, combining the sections to obtain a plurality of section combinations, determining scores in a plurality of different statistical periods according to each section combination to obtain a line loss scoring table, calculating a power transmission section to be evaluated, presetting target line loss in a period, and searching corresponding scores from the line loss scoring table based on the target line loss. According to the invention, the historical line loss data of each line of 10kV or below is fully acquired, a new line loss evaluation standard is reconstructed based on the historical line loss data, the interference of high loss statistical results caused by different loads of the line or a transformer area is avoided, the deviation caused by adopting a theoretical line loss calculation mode is avoided, and the accuracy of line loss evaluation is improved. In addition, according to the line loss evaluation method provided by the embodiment of the invention, for the lines or the distribution areas with longer duration period, larger line loss rate and larger loss electric quantity, the lower the evaluation score or the larger the deduction score, the higher the accurate loss point hit rate and the more obvious loss effect.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a line loss evaluation method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a line loss evaluation apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1 is a flowchart of a line loss evaluation method according to an embodiment of the present invention, where the method is applicable to evaluating a line loss situation in a power transmission interval, and the method may be executed by a line loss evaluation device according to an embodiment of the present invention, where the line loss evaluation device may be implemented by software and/or hardware, and is generally configured in a computer device, as shown in fig. 1, the method specifically includes the following steps:
and S101, acquiring historical line loss data.
Illustratively, for the feeder lines, the feeder lines are mainly acquired from a metering acquisition system or a marketing electricity consumption information management system, and include basic archive information such as a unit to which each feeder line belongs, responsible persons, numbers, names, and the like for line loss statistics, and data such as power supply amount (or input electric quantity), power sale amount (or output electric quantity), special variable power sale amount, line loss rate, line loss index, and the like (no special description is provided below, the power supply amount refers specifically to the power supply amount or the input electric quantity, and the power sale amount refers specifically to the power sale amount or the output electric quantity). The power loss is the difference between the power supply quantity and the power sale quantity.
And obtaining the length of each feeder line, the power supply radius and the like from the power distribution network management system.
The number of distribution transformers (distribution transformers) under each feeder line, the type of each distribution transformer (distinguished according to a cooling mode), the type, the capacity, the running time and the like are obtained from any one of a metering acquisition system, a marketing electricity utilization information management system or a distribution network management system.
And acquiring the no-load loss parameters of the distribution transformer from national standards or industrial standards, and establishing a table for checking the no-load loss parameters of the distribution transformer in different types, different types and different capacities, such as dry type, oil immersion type and the like. And (3) each distribution transformer no-load loss electric quantity = no-load loss parameter value (p) in the statistics 0 ) X number of operating hours (t).
The distribution transformer area is mainly obtained from a metering acquisition system or a marketing electricity information management system, and comprises basic archive information such as a unit, responsible personnel, a number and a name of each distribution transformer area for line loss statistics, and data such as power supply quantity (or input electric quantity), power selling quantity (or output electric quantity), line loss rate and line loss indexes. The loss electric quantity is the difference value between the supply electric quantity and the selling electric quantity.
The system is obtained from a metering acquisition system or a marketing electricity utilization information management system and comprises the number of single-phase meters, three-phase meters, concentrators, collectors and the like under each distribution transformer area and the running time of each single-phase meter, three-phase meter, concentrator, collector and the like.
And acquiring the distribution transformer capacity of each distribution transformer area from any one of a metering acquisition system, a marketing electricity utilization information management system or a power distribution network management system.
And carrying out laboratory test on the actual operation power consumption of the single-phase meter, the three-phase meter, the concentrator, the collector and the low-voltage power distribution cabinet, and establishing a reference checking meter for the power consumption of the low-voltage network equipment.
And S102, dividing the historical line loss data into a plurality of intervals according to different division types, and combining the intervals to obtain a plurality of interval combinations.
Illustratively, the feeder line is divided into any number of power supply amount intervals Gii according to the power supply amount of the feeder line, for example, the power supply amount is divided into three intervals of less than 100 ten thousand kilowatt hours, 100-200 ten thousand kilowatt hours, and more than 200 ten thousand kilowatt hours. The power supply radius is divided into any number of power supply length intervals Hjj according to the size (or length) of the power supply radius of the feeder line or the permutation and combination of the two, for example, the power supply radius is divided into three intervals of less than 1 kilometer, 1-2 kilometers and more than 2 kilometers.
The line loss rate and the standard threshold value of the line loss electric quantity of each typical interval can be manually set or the historical line loss data can be classified into each typical interval according to the divided typical interval conditions, normal distribution or classified collection statistical analysis is carried out on each typical interval, and the feeder line loss rate Ki and the loss electric quantity Li of each typical interval are generated to serve as the standard threshold value.
And for the distribution transformer area, dividing the distribution transformer area into any number of capacity intervals Mii according to the size of the distribution transformer capacity, wherein the capacity is divided into three intervals of less than 315kVA, 315-630kVA and more than 630 kVA. The power supply quantity is divided into any plurality of power supply quantity intervals Njj according to the power supply quantity of the distribution transformer area, for example, the power supply quantity is divided into three intervals of less than 10 ten thousand kilowatt hours, 10-20 ten thousand kilowatt hours and more than 20 ten thousand kilowatt hours.
The line loss rate and the line loss electric quantity reference threshold value of each typical interval can be manually set or the line loss statistical result of each distribution transformer area is classified into each typical interval according to the historical line loss data and the equipment data and the divided typical interval conditions, normal distribution or classified summary statistical analysis is carried out on each typical interval, and the distribution transformer area line loss rate Pi and the loss electric quantity Qi of each typical interval are generated as the reference threshold values.
In some embodiments of the invention, in order to eliminate or reduce the influence of temperature on line loss evaluation as much as possible, a reference threshold value adjustable coefficient is introduced according to the line loss variation characteristic along with temperature, so that the line loss rate and the loss electric quantity reference threshold value of each statistical period are ensured, the line loss rate and the loss electric quantity reference threshold value can be properly increased or decreased according to the temperature, and the unreasonable deviation of the line loss evaluation result caused by the influence of temperature is reduced. Thus, a feeder line adjustable coefficient table and a distribution transformer area adjustable coefficient table are obtained.
For a feeder line, the adjustment threshold standard of the line loss rate of the feeder line in the examination period = a reference threshold Ki multiplied by an adjustable coefficient Kp, and the adjustment threshold standard of the loss electric quantity of the feeder line in the kernel period = a reference threshold standard Li multiplied by an adjustable coefficient Lp.
Aiming at a distribution transformer area, adjusting a threshold standard = a reference threshold standard Pi multiplied by an adjustable coefficient Pp of a 'line loss rate' of the distribution transformer area in an assessment period; and adjusting threshold standard = reference threshold standard Qi × adjustable coefficient Qp of the distribution and transformation station area "power loss" in the assessment period.
And S103, determining scores in a plurality of continuous statistical periods according to each interval combination to obtain a line loss score table.
And (4) grading a plurality of continuous statistical cycles by adopting a deduction system aiming at each interval combination to obtain a line loss grading table.
Setting a line loss evaluation standard according to a statistical cycle month, week or day and a continuous cycle number Mcj continuously exceeding a threshold standard, wherein the evaluation method adopts a deduction system, different deduction values are set for different continuous cycle numbers Mcj, the deduction values of a feeder line are Kf _ ij and Lf _ ij, and the deduction values of distribution and transformation station zones are Pf _ ij and Qf _ ij. Thus, a feeder line loss evaluation lookup table and a distribution transformer area line loss evaluation lookup table are obtained.
And S104, calculating a power transmission interval to be evaluated, and presetting the target line loss in a period.
The traditional line loss is counted as: the line loss rate = (power supply amount-electricity selling amount)/power supply amount X100%, the loss electricity amount = power supply amount-electricity selling amount, the loss electricity amount comprises losses such as distribution transformer no-load loss and metering device loss, and in consideration of inherent loss stability of equipment such as distribution transformer no-load loss and metering devices, in order to better expose line loss points, loss electricity amount and continuous periods after the inherent losses of the distribution transformer and the metering devices are removed are taken into loss reduction evaluation on a transmission line loss statistical scheme.
According to the line loss data, the equipment data, the threshold value standard and the evaluation standard in the statistical period, line loss evaluation is carried out on all the feeder lines and the distribution transformer area in the statistical period, and firstly, line loss data adjustment calculation is carried out; secondly, according to the line loss statistical result, evaluating according to the duration period, specifically as follows:
1. feed line
Line loss rate = (power supply amount-electricity selling amount-sigma distribution transformation no-load loss electricity amount)/power supply amount x 100%;
the lost electric quantity = the supply electric quantity-the selling electric quantity-sigma distribution transformation no-load loss electric quantity.
And the single distribution transformer no-load loss electric quantity = distribution transformer no-load loss parameter multiplied by the distribution transformer running time length. And calculating the no-load loss parameters of the distribution transformer according to a table look-up method, and inquiring and acquiring the table look-up of the no-load loss parameters of the distribution transformer according to the type, the model and the capacity of each distribution transformer.
2. Distribution transformer area
Line loss rate = (power supply amount-electricity selling amount-inherent electricity loss of sigma metering device-inherent electricity loss of sigma low-voltage power distribution cabinet)/power supply amount x 100%;
the power loss = power supply quantity-power selling quantity-sigma inherent power loss of the metering device-sigma inherent power loss of the low-voltage power distribution cabinet.
The inherent power consumption of the metering device is = single-phase meter daily power consumption, multiplied by the running time, multiplied by three-phase meter daily power consumption, multiplied by the running time, multiplied by collector daily power consumption, multiplied by the running time, multiplied by concentrator daily power consumption, multiplied by the running time; inherent power loss of the low-voltage power distribution cabinet = inherent power loss of the low-voltage power distribution cabinet × operation time length. The daily power loss of the metering device and the low-voltage power distribution cabinet is calculated according to a table look-up method, and the daily power loss of the low-voltage power distribution cabinet is inquired and obtained in a table look-up of the power loss of the low-voltage network equipment.
According to the method, the inherent loss stability of equipment such as distribution transformer no-load loss and a meter is fully considered, loss electric quantity and continuous month number after the inherent loss of the distribution transformer and the inherent loss of a metering device are removed are taken into loss reduction evaluation on the transmission line loss statistical scheme, and the accuracy of line loss evaluation is improved.
And S105, searching corresponding scores from the line loss score table based on the target line loss.
And aiming at the feeders, according to the power supply amount, the power supply length, the line loss rate, the loss electric quantity and the continuous periodicity of each feeder, performing table lookup on a feeder line loss evaluation lookup table and an adjustment threshold standard and an evaluation standard table generated by a feeder adjustable coefficient table, and calculating the deduction value or the scoring value of each feeder.
And aiming at the distribution and transformation station area, according to the distribution and transformation capacity, the power supply quantity, the line loss rate, the loss power quantity and the continuous periodicity, performing table lookup on the line loss evaluation lookup table of the distribution and transformation station area and an adjustment threshold value standard and an evaluation standard generated by an adjustable coefficient table of the distribution and transformation station area, and calculating a deduction value or a scoring value of each distribution and transformation station area.
In some embodiments of the present invention, the evaluation result may be visually displayed, specifically as follows:
according to the line loss data of the statistical period, a series of tables or query results are generated, line loss completion conditions and evaluation conditions of the affiliated feeder lines and distribution transformer area can be counted according to units or responsible persons, and statistics or query can be conducted according to the year, season, month or stage. The method comprises the following specific steps:
1) And (4) counting the total withholding value, the average withholding value and the like of the governed feeder line and the distribution transformer area.
2) And (4) counting the power supply quantity, the power sale quantity, the line loss rate and the deduction value (or the scoring value) before recalculating each line and each platform area under jurisdiction and the recalculated power supply quantity, the power sale quantity, the line loss rate and the deduction value (or the scoring value). Units, list of responsible persons and deduction conditions that the evaluation deduction value exceeds a set upper limit value or the evaluation deduction value exceeds a set lower limit value can be generated.
3) And various data participating in calculation of each feeder line and each distribution transformer area can be displayed.
4) The power supply quantity, the power selling quantity, the special variable power selling quantity and the line loss rate of each feeder line and each distribution transformer area before and after recalculation can be displayed in a format of the power supply quantity, the power selling quantity, the special variable power selling quantity and the line loss rate in a statistical period according to a row statistical period.
5) Line loss abnormal rate statistics can be carried out according to line loss rate, loss electric quantity threshold value or index and the like by unit and responsible person, wherein line loss abnormal indicates that the line loss rate or loss electric quantity completion value exceeds a set line loss rate threshold value or loss electric quantity threshold value, and the feeder line loss abnormal rate = abnormal feeder quantity/feeder quantity; the line loss abnormal rate of the transformer area = number of abnormal transformer area/number of transformer area.
The line loss evaluation method provided by the embodiment of the invention comprises the following steps: the method comprises the steps of obtaining historical line loss data, dividing the historical line loss data into a plurality of intervals according to different division types, combining the intervals to obtain a plurality of interval combinations, determining scores in a plurality of continuous statistical periods aiming at each interval combination to obtain a line loss grading table, calculating a power transmission interval to be evaluated, presetting a target line loss in a period, and searching corresponding scores from the line loss grading table based on the target line loss. According to the invention, the historical line loss data of each line of 10kV or below is fully acquired, a new line loss evaluation standard is reconstructed based on the historical line loss data, the interference of high loss statistical results caused by different loads of the line or the distribution room is avoided, the deviation caused by adopting a theoretical line loss calculation mode is avoided, and the accuracy of line loss evaluation is improved. In addition, according to the line loss evaluation method provided by the embodiment of the invention, for the lines or the distribution areas with longer duration period, larger line loss rate and larger loss electric quantity, the lower the evaluation score or the larger the deduction score, the higher the accurate loss point hit rate and the more obvious loss effect.
Example two
A second embodiment of the present invention provides a line loss evaluation apparatus, and fig. 2 is a schematic structural diagram of the line loss evaluation apparatus provided in the second embodiment of the present invention, as shown in fig. 2, the line loss evaluation apparatus includes:
a data obtaining module 201, configured to obtain historical line loss data;
the interval combination module 202 is configured to divide the historical line loss data into a plurality of intervals according to different division types, and combine the intervals to obtain a plurality of interval combinations;
a score table determining module 203, configured to determine scores in multiple continuous statistical periods for each interval combination, so as to obtain a line loss score table;
the target line loss calculation module 204 is used for calculating the target line loss in a preset period of a power transmission interval to be evaluated;
a scoring module 205, configured to look up a corresponding score from the line loss scoring table based on the target line loss.
In some embodiments of the present invention, the data acquisition module 201 comprises:
the first acquisition unit is used for acquiring the historical line loss rate and the historical loss electric quantity of the feeder line from the metering acquisition system or the marketing electricity utilization information management system;
the second acquisition unit is used for acquiring the length of the feeder line from the power distribution network management system;
and the third acquisition unit is used for acquiring the running time of the distribution transformer under the feeder from a metering acquisition system, a marketing electricity consumption information management system or a power distribution network management system.
In some embodiments of the present invention, interval combining module 202 comprises:
the first combination unit is used for dividing the historical line loss rate into a plurality of intervals according to the power supply quantity grade and the feeder line length grade, and combining the intervals to obtain a plurality of interval combinations;
and the second combination unit is used for dividing the historical loss electric quantity into a plurality of intervals according to the power supply quantity grade and the feeder line length grade, and combining the intervals to obtain a plurality of interval combinations.
In some embodiments of the present invention, the data acquisition module 201 comprises:
the fourth acquisition unit is used for acquiring the historical line loss rate, the historical loss electric quantity and the running duration of the distribution transformer area from the metering acquisition system or the marketing electricity information management system;
and the fifth acquisition unit is used for acquiring the capacity of the distribution transformer area from a metering acquisition system, a marketing electricity utilization information management system or a distribution network management system.
In some embodiments of the present invention, interval combining module 202 comprises:
a third combination unit, configured to divide the historical line loss rate into a plurality of intervals according to a capacity class and a power supply level, and combine the intervals to obtain a plurality of interval combinations;
and the fourth combination unit is used for dividing the historical loss electric quantity into a plurality of sections according to the capacity grade and the power supply quantity grade, and combining the sections to obtain a plurality of section combinations.
In some embodiments of the present invention, the target line loss calculation module 204 comprises:
the first calculation unit is used for calculating the difference value between the power supply quantity and the electricity selling quantity of the feeder line in the power transmission section to be evaluated aiming at the feeder line to obtain a first numerical value;
the second calculation unit is used for calculating the no-load power loss of the distribution transformer in the power transmission interval to be evaluated;
the third calculating unit is used for calculating the difference value between the first numerical value and the no-load loss electric quantity to obtain the loss electric quantity of the feeder line;
and the fourth calculating unit is used for calculating the quotient of the loss electric quantity of the feeder line and the power supply quantity to obtain a target line loss rate of the power transmission section to be evaluated.
In some embodiments of the present invention, the target line loss calculation module 204 comprises:
the fifth calculation unit is used for calculating the difference value between the power supply quantity and the electricity selling quantity of the distribution transformer area of the power transmission section to be evaluated according to the distribution transformer area to obtain a second numerical value;
a sixth calculating unit, configured to calculate a sum of inherent power loss of the metering device and inherent power loss of the low-voltage power distribution cabinet in the power transmission interval to be evaluated, so as to obtain a third value;
the seventh calculating unit is used for calculating the difference between the second numerical value and the third numerical value to obtain the loss electric quantity of the distribution transformer area;
and the eighth calculating unit is used for calculating the quotient of the loss electric quantity of the distribution transformer area and the power supply quantity to obtain a target line loss rate of the power transmission area to be evaluated.
The line loss evaluation device can execute the line loss evaluation method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the line loss evaluation method.
EXAMPLE III
FIG. 3 is a block diagram of a computer device, which is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other suitable computers, according to an embodiment of the invention. The computer device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 3, the computer device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from a storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the computer device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
A number of components in the computer device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the computer device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
In some embodiments, the line loss evaluation method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the computer device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the line loss evaluation method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the line loss evaluation method by any other suitable means (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the computer device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A line loss evaluation method is characterized by comprising the following steps:
obtaining historical line loss data;
dividing the historical line loss data into a plurality of intervals according to different division types, and combining the intervals to obtain a plurality of interval combinations;
determining scores in a plurality of continuous statistical periods aiming at each interval combination to obtain a line loss score table;
calculating a power transmission interval to be evaluated, and presetting target line loss in a period;
and searching a corresponding score from the line loss scoring table based on the target line loss.
2. The line loss evaluation method according to claim 1, wherein obtaining historical line loss data comprises:
obtaining a historical line loss rate and historical loss electric quantity of a feeder line from a metering acquisition system or a marketing electricity consumption information management system;
acquiring the length of the feeder line from a power distribution network management system;
and acquiring the running time of the distribution transformer under the feeder from a metering acquisition system, a marketing electricity consumption information management system or a distribution network management system.
3. The line loss evaluation method according to claim 2, wherein the step of dividing the historical line loss data into a plurality of sections according to different division types and combining the sections to obtain a plurality of section combinations comprises:
dividing the historical line loss rate into a plurality of intervals according to the power supply quantity grade and the feeder line length grade, and combining the intervals to obtain a plurality of interval combinations;
and dividing the historical loss electric quantity into a plurality of intervals according to the power supply quantity grade and the feeder line length grade, and combining the intervals to obtain a plurality of interval combinations.
4. The line loss evaluation method according to claim 1, wherein obtaining historical line loss data comprises:
acquiring historical line loss rate, historical loss electric quantity and operation duration of a distribution transformer area from a metering acquisition system or a marketing electricity consumption information management system;
and acquiring the capacity of the distribution transformer area from a metering acquisition system, a marketing electricity utilization information management system or a distribution network management system.
5. The line loss evaluation method according to claim 4, wherein the step of dividing the historical line loss data into a plurality of sections according to different division types and combining the sections to obtain a plurality of section combinations comprises:
dividing the historical line loss rate into a plurality of intervals according to the capacity grade and the power supply quantity grade, and combining the intervals to obtain a plurality of interval combinations;
and dividing the historical loss electric quantity into a plurality of sections according to the capacity grade and the power supply quantity grade, and combining the sections to obtain a plurality of section combinations.
6. The line loss evaluation method according to any one of claims 1 to 5, wherein calculating the target line loss in a preset period in the power transmission interval to be evaluated comprises:
calculating the difference value between the power supply quantity and the power sale quantity of the feeder line in the power transmission section to be evaluated aiming at the feeder line to obtain a first numerical value;
calculating the no-load power loss of the distribution transformer in the power transmission interval to be evaluated;
calculating a difference value between the first numerical value and the no-load power loss to obtain the power loss of the feeder line;
and calculating the quotient of the loss electric quantity of the feeder line and the power supply quantity to obtain a target line loss rate of the power transmission section to be evaluated.
7. The line loss evaluation method according to any one of claims 1 to 5, wherein calculating the target line loss in a preset period in the power transmission interval to be evaluated comprises:
calculating the difference value between the power supply quantity and the electricity selling quantity of the distribution transformer area of the power transmission area to be evaluated aiming at the distribution transformer area to obtain a second numerical value;
calculating the sum of the inherent power loss of the metering device and the inherent power loss of the low-voltage power distribution cabinet in the power transmission interval to be evaluated to obtain a third numerical value;
calculating the difference between the second value and the third value to obtain the loss electric quantity of the distribution transformer area;
and calculating the quotient of the loss electric quantity of the distribution transformer area and the power supply quantity to obtain a target line loss rate of the power transmission area to be evaluated.
8. A line loss evaluation device is characterized by comprising:
the data acquisition module is used for acquiring historical line loss data;
the interval combination module is used for dividing the historical line loss data into a plurality of intervals according to different division types and combining the intervals to obtain a plurality of interval combinations;
the scoring table determining module is used for determining the scoring in a plurality of continuous statistical periods aiming at each interval combination to obtain a line loss scoring table;
the target line loss calculation module is used for calculating the target line loss in a preset period of the power transmission interval to be evaluated;
and the scoring module is used for searching corresponding scores from the line loss scoring table based on the target line loss.
9. A computer device, comprising:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the line loss evaluation method of any one of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a line loss evaluation method according to any one of claims 1 to 7.
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| CN115524534A (en) * | 2022-11-04 | 2022-12-27 | 广东欢联电子科技有限公司 | Line loss testing method and system for communication cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115524534A (en) * | 2022-11-04 | 2022-12-27 | 广东欢联电子科技有限公司 | Line loss testing method and system for communication cable |
| CN115524534B (en) * | 2022-11-04 | 2023-02-28 | 广东欢联电子科技有限公司 | Line loss testing method and system for communication cable |
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