CN115473216B - Method and system for improving power grid line loss calculation - Google Patents
Method and system for improving power grid line loss calculation Download PDFInfo
- Publication number
- CN115473216B CN115473216B CN202210606681.0A CN202210606681A CN115473216B CN 115473216 B CN115473216 B CN 115473216B CN 202210606681 A CN202210606681 A CN 202210606681A CN 115473216 B CN115473216 B CN 115473216B
- Authority
- CN
- China
- Prior art keywords
- line loss
- electricity consumption
- data set
- ammeter
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004364 calculation method Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000005611 electricity Effects 0.000 claims abstract description 140
- 230000002159 abnormal effect Effects 0.000 claims description 29
- 230000000694 effects Effects 0.000 claims description 8
- 238000003860 storage Methods 0.000 description 12
- 230000003287 optical effect Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/06—Energy or water supply
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Economics (AREA)
- Health & Medical Sciences (AREA)
- Human Resources & Organizations (AREA)
- Strategic Management (AREA)
- Water Supply & Treatment (AREA)
- General Health & Medical Sciences (AREA)
- Power Engineering (AREA)
- Marketing (AREA)
- Primary Health Care (AREA)
- Public Health (AREA)
- Tourism & Hospitality (AREA)
- Physics & Mathematics (AREA)
- General Business, Economics & Management (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a method and a system for improving power grid line loss calculation, comprising the following steps: for each target platform area, acquiring a voltage data set and a power consumption data set corresponding to the sub-ammeter in the target platform area; wherein the target area comprises at least one sub-ammeter; obtaining a line loss value of the target station area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each station area; judging whether the line loss value meets a preset condition or not; if yes, generating line loss state information; the line loss state information comprises at least one of a line loss value, a station area corresponding to the line loss value and a time for obtaining the line loss value. The invention can accurately acquire the line loss value of the target station area, and improves the accuracy of calculating the line loss value.
Description
Technical Field
The invention relates to the technical field of power distribution network line technologies, in particular to a method and a system for improving power grid line loss calculation.
Background
The distribution network of the power system is increasingly large and complex, but the power utilization rate is reduced due to serious line loss, and a large amount of resources are wasted.
At present, in the process of calculating the total electric quantity of the station area, the line loss is generally used as a fixed value, and the characteristics of the line are not considered, so that the calculated total electric quantity has larger deviation. Therefore, a method for precisely calculating the line loss according to the characteristics of the line itself is required.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above-mentioned problems associated with the prior art methods of improving the calculation of line losses in a power grid.
Therefore, the invention aims to provide a method for improving the line loss calculation of the power grid, which realizes the calculation of the line loss, improves the accuracy of the line loss calculation and provides convenience for the overhaul of staff.
In order to solve the technical problems, the invention provides the following technical scheme: the method for improving the power grid line loss calculation comprises the steps of aiming at a target area, acquiring a voltage data set and a power consumption data set corresponding to a branch ammeter in the target area; obtaining a line loss value of a target platform area according to a voltage data set, a power consumption data set, a power factor and a line loss coefficient of the target platform area; judging whether the line loss value meets a preset condition or not; if yes, generating line loss state information.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: the method for acquiring the voltage data set and the power consumption data set corresponding to the sub-ammeter in the target station area comprises the following steps: periodically acquiring voltage data, and forming a voltage data group based on each voltage data; and periodically acquiring electricity consumption data, and forming an electricity consumption data set based on the electricity consumption data.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: calculating a line loss value of each target station area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target station area, wherein the line loss formula is as follows:
LL is line loss, P is the number of sub-meters in the target area, beta jk As the coefficient of the line loss,
for the electricity consumption of the j ammeter at instant i +.>
For the electricity consumption of the k ammeter at the moment of i, U j For voltages at all moments of j ammeter, U k For the voltage at all times of the k meter, +.>
For the power factor of j ammeter, ">
Is the power factor of k ammeter.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: according to the line loss formula, the total electricity meter power supply quantity of the station area can be calculated, wherein the total electricity meter power supply quantity is equal to the sum of the accumulated electricity consumption of the branch electricity meters, the fixed loss value of the station area and the sum of the line loss values, and the formula is as follows:
wherein y (i) is the total electricity meter power supply quantity,
for j electricity meter power supply quantity at moment i, e j Estimating the metering error for the branch ammeter, e 0 To fix loss beta jk For the line loss coefficient, P is the number of users in the area, U j For the voltage of j ammeter, U k For the voltage of k ammeter>
For the power factor of j ammeter, ">
For the power factor of k ammeter, e k The metering error is estimated for the k-meter,
and (5) supplying power to the k ammeter at the moment i.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: calculating the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient through a line loss formula to obtain line loss, wherein the method comprises the following steps of:
obtaining a line loss formula through a station area loss formula and phase information of alternating current;
the loss formula of the target station area is as follows:
Δt is a preset interval duration, α ij The coefficient of regularization,
for the power consumption of all sub-meters at time i, < >>
And the electricity consumption of the j ammeter at all moments.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: after the voltage data set and the electricity consumption data set corresponding to the sub-ammeter in the target platform area are obtained, the method further comprises the following steps: judging whether abnormal data exists in the electricity consumption data set or not based on a preset judging rule; if yes, the abnormal data are removed from the electricity consumption data set.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: determining whether abnormal data exists in the electricity consumption data set based on a preset determination rule comprises the following steps: and when any electricity consumption value in the electricity consumption data set is 0, judging that the electricity consumption data corresponding to the electricity consumption value is abnormal data, wherein the electricity consumption data comprises the electricity consumption value and the electricity consumption value acquisition time.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: and after the line loss state information is generated, sending out early warning information corresponding to the line loss state information, wherein the expression form of the early warning information comprises at least one of voice, text and sound effect.
The invention also comprises an improved power grid line loss calculation system, which comprises a data acquisition module, a power distribution module and a power consumption module, wherein the data acquisition module is used for acquiring a voltage data set and a power consumption data set corresponding to the branch electric meters in each target area; wherein the target area comprises at least one sub-ammeter; the line loss value calculation module is used for obtaining the line loss value of each target station area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of the target station area; the judging module is used for judging whether the line loss value accords with a preset condition; and the information generation module is used for generating line loss state information when the line loss value accords with a preset condition.
As a preferred embodiment of the method for improving the calculation of the line loss of the power grid according to the invention, the method comprises the following steps: the line loss state information comprises at least one of a line loss value, a station area corresponding to the line loss value and a time for obtaining the line loss value.
The invention has the beneficial effects that: and obtaining a voltage data set and a power consumption data set corresponding to the branch ammeter in each target area by aiming at each target area, and obtaining the line loss value of the area according to the voltage data set, the power consumption data set, the power factor and the line loss coefficient of each target area. And judging whether the line loss value meets a preset condition, and if so, generating line loss state information. The invention realizes the acquisition of the line loss value of the target station area and improves the accuracy of the calculation of the line loss value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a flow chart of a method for improving power grid line loss calculation according to the present invention.
Fig. 2 is a circuit diagram of a method of improving the line loss calculation of a power grid according to the present invention.
FIG. 3 is a flow chart of a system for improving power grid line loss calculation according to the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1, a flow chart of a line loss calculation method provided by an embodiment of the present invention is applicable to a case of calculating line loss of a station, and as shown in fig. 1, the line loss calculation method of the embodiment of the present invention specifically includes the following steps:
the method comprises the steps that firstly, voltage data sets and electricity consumption data sets corresponding to the branch electricity meters in each target area are obtained; wherein the station area comprises at least one sub-ammeter. Optionally, the target area includes a total electric meter and a plurality of branch electric meters, the total electric meter is used for recording the power supply quantity of the transformer in the target area, and the branch electric meter is used for recording the power consumption quantity of each user in the target area. The voltage data set refers to a series of voltage data acquired according to a preset acquisition period. The electricity consumption data set refers to a series of electricity consumption data acquired according to a preset acquisition period. The collection period of the voltage data and the collection period of the electricity consumption data may be the same collection period. The voltage data set comprises a plurality of voltage data, and the voltage data comprises a voltage value and a voltage acquisition time. The electricity consumption data set comprises a plurality of electricity consumption data, and the electricity consumption data comprises an electricity consumption value and the collection time of the electricity consumption.
Specifically, a voltage data set and a power consumption data set corresponding to the sub-ammeter in the target area are obtained. Alternatively, the voltage data can be obtained through a sensor, and the electricity consumption data can be obtained through calculation according to the indication value of the ammeter. And preparing for the subsequent calculation of the line loss by acquiring the voltage data set and the electricity consumption data set.
It should be noted that, loss exists in the line between the transformer and each user in the transformer area, and the embodiment of the invention can calculate the line loss value in the transformer area, thereby improving the accuracy of line loss calculation.
Step two, obtaining a line loss value of each target area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target area; the power factor and the line loss coefficient may be preset. The line loss value is a value obtained through calculation, and can express the loss condition of the line. Alternatively, the power factor corresponding to each meter may be the same or different.
Specifically, the line loss value of the station area is determined according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target station area, and the line loss value is calculated more accurately through the mode.
Further, in an embodiment of the present invention, obtaining a voltage data set and a power consumption data set corresponding to a sub-electric meter in a target station area includes: periodically acquiring voltage data, and forming a voltage data group based on each voltage data; and periodically acquiring electricity consumption data, and forming an electricity consumption data set based on the electricity consumption data.
Specifically, voltage data are repeatedly acquired according to a preset time interval, for example, the preset time interval is 1ms, the acquisition period is 60s, a series of voltage data are obtained, and voltage data sets are sequentially arranged according to the acquisition time. And similarly, acquiring a power consumption data set. Optionally, the data of each acquisition period is used for calculating the line loss value sequentially, and the data volume is sufficient and is updated quickly, so that whether the subsequent line is abnormal or not is conveniently determined based on the line loss value, and the staff can overhaul in time.
Thirdly, judging whether the line loss value meets a preset condition or not; the preset condition includes whether the line loss value exceeds a preset threshold value or is within a preset range. The preset threshold may be set according to the number of electricity meters for the station area and the line condition, which is not particularly limited herein. Similarly, the preset range is the same as the preset threshold setting principle.
Specifically, the line loss value is judged based on a preset condition, if the line loss value meets the preset condition, line loss state information is generated, and if the line loss value does not meet the preset condition, the data of the target station area are circularly acquired.
Thirdly, generating line loss state information; the line loss state information includes at least one of a line loss value, a station area corresponding to the line loss value, and a time for obtaining the line loss value.
Specifically, line loss state information is generated, so that the staff can check the line loss state information conveniently. Optionally, when the status-showing instruction is received, the line loss status information is shown based on the status-showing instruction. The line loss state information can be displayed on a display interface, a mobile phone terminal and a tablet personal computer. The content displayed may be: 2022.3.2 And (3) line loss of the XX platform region reaches a YY value which exceeds a line loss threshold value, and line maintenance of the platform region is recommended.
Optionally, when the line loss state information is generated, whether the transformer is in light-load operation is determined according to the size of the area and the number of users, so that advice information corresponding to the operation number of the transformer is obtained. When the transformer is in light operation, the fixed loss is larger than the variable loss, and at the moment, if one operation transformer is closed, the total power loss of the transformer is reduced, so that the number of operation transformers is adjusted to obtain the reduction of network electric energy loss, and the line loss is reduced.
Further, different line loss preset ranges and overhaul suggestions corresponding to the different line loss preset ranges are preset. When the line loss value is calculated to be within a certain line loss preset range, determining an overhaul suggestion based on the line loss preset range, wherein the generated line loss state information comprises the overhaul suggestion. For example, the line loss preset range (1% -3% ] corresponds to a first level of service advice including checking the lines of the bay, and the line loss preset range (3% -5% ] corresponds to a second level of service advice including checking the respective lines of the bay and replacing the cables/wires used for the lines accordingly.
Further, in the embodiment of the present invention, obtaining a line loss value of a station area according to a voltage data set, a power consumption data set, a power factor and a line loss coefficient of each target station area includes: calculating a voltage data set, a power consumption data set, a power factor and a line loss coefficient through a line loss formula to obtain line loss;
the line loss formula is as follows:
LL is line loss, P is the number of sub-meters in the target area, beta jk As the coefficient of the line loss,
for the electricity consumption of the j ammeter at instant i +.>
For the electricity consumption of the k ammeter at the moment of i, U j For voltages at all moments of j ammeter, U k For the voltage at all times of the k meter, +.>
For the power factor of j ammeter, ">
Is the power factor of k ammeter. Note that j and k are meter identifications, but are distinguishable meters, alternatively represented as indexes. The j and k appearing in the following formulas are all of the same meaning. In the embodiment of the invention, the power factors of the sub-electric meters can be set to be the same.
Specifically, the total electricity meter power supply quantity of the station area can be calculated according to the line loss formula, wherein the total electricity meter power supply quantity is equal to the sum of the accumulated electricity consumption of the branch electricity meters, the fixed loss value of the station area and the sum of the line loss values.
In the embodiment of the invention, the calculation formula for the total electricity meter power supply amount is as follows:
wherein y (i) is the total electricity meter power supply quantity,
for j electricity meter power supply quantity at moment i, e j Estimating the metering error for the branch ammeter, e 0 To fix loss beta jk For the line loss coefficient, P is the number of users in the area, U j For the voltage of j ammeter, U k For the voltage of k ammeter>
For the power factor of j ammeter, ">
For the power factor of k ammeter, e k The metering error is estimated for the k-meter,
and (5) supplying power to the k ammeter at the moment i. It should be understood that j and k are only used herein to distinguish between different meters, although j and k may be replaced with the numbers 1 and 2 to distinguish between different meters.
The line loss formula is as follows:
to make the line calculation more accurate, the line loss can be calculated by, for example, for the circuit diagram shown in fig. 2, U 0 Representing the voltage of the power supply, U 1 、U 2 、U 3 The voltages representing the three measuring points can be supplied by the transformer of the type of the transformer area in fig. 2. The calculated line loss is:
wherein Δt isMetering cycle duration, delta phi i Is the sum of the electricity consumption of three metering points at the moment i, delta phi j Represents the electricity consumption of j metering points, alpha ij Representing regular coefficients, U i Indicating the voltage value at time i, U j The voltage value at the j metering point is indicated. The regular coefficient refers to a coefficient in the ridge regression method.
Further, in the embodiment of the present invention, calculating the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient through a line loss formula to obtain a line loss includes:
obtaining a line loss formula through a station area loss formula and phase information of alternating current;
the area loss formula is as follows:
wherein deltat is the duration of a preset interval, alpha ij Regular coefficient, delta phi i For the electricity consumption of all sub-meters at the moment i, delta phi j And the electricity consumption of the j ammeter at all moments.
Through the above calculation method for fig. 2, a zone loss formula can be obtained, and the above formula is converted into the following formula in consideration of the phase relation of the alternating current:
the line loss formula of the embodiment of the invention is obtained, and the line loss value is more accurate through the line loss formula of the embodiment of the invention.
According to the technical scheme of the embodiment of the invention, the voltage data set and the electricity consumption data set corresponding to the electricity distribution meters in the target area are obtained for each target area, and the line loss value of the area is obtained according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target area. And judging whether the line loss value meets a preset condition, and if so, generating line loss state information. The technical scheme of the embodiment of the invention realizes the acquisition of the line loss value of the target station area and improves the accuracy of line loss value calculation.
Example 2
Referring to fig. 1, a second embodiment of the present invention is shown, which is different from the first embodiment in that: the embodiment of the present invention adds a step of determining an abnormality of electricity consumption data based on the alternative scheme of the above embodiment, where technical terms identical to or similar to those of the above embodiment will not be repeated, and the line loss calculation method provided by the embodiment of the present invention specifically includes the following steps:
the first step, for each target area, a voltage data set and a power consumption data set corresponding to the sub-ammeter in the target area are obtained.
Step two, judging whether abnormal data exists in the electricity consumption data set or not based on a preset judging rule; if yes, eliminating abnormal data from the electricity consumption data set; the preset determination rule refers to a rule for determining whether the power consumption data is abnormal data. For example, when a certain electricity consumption data is 0 in the electricity consumption data set, it is determined that the electricity consumption data is abnormal. Or when the electricity consumption value at a certain moment is smaller than the electricity consumption value at the previous moment in the electricity consumption data group arranged according to the time sequence, judging that the electricity consumption data at the moment is abnormal data.
Specifically, the electricity consumption data set is judged according to a preset judging rule, whether abnormal data exist in the electricity consumption data set is judged, the abnormal data are removed from the electricity consumption data set, and the influence on the subsequent calculation of the line loss value is avoided.
Further, in an embodiment of the present invention, determining whether abnormal data exists in the electricity consumption data set based on a preset determination rule includes: when any electricity consumption value in the electricity consumption data set is 0, judging that the electricity consumption data corresponding to the electricity consumption value is abnormal data; the electricity consumption data comprise electricity consumption values and electricity consumption value acquisition moments.
Specifically, when any power consumption value is 0, it is determined that the power consumption data corresponding to the power consumption value is abnormal data. At this time, the electricity meter may be abnormal, so that the electricity consumption value is 0, and the abnormal data is deleted in order to avoid affecting the subsequent calculation of the line loss value. Optionally, when the electricity consumption value is determined to be 0, a prompt message is sent to prompt a worker to overhaul the sub-ammeter corresponding to the electricity consumption value, and whether the sub-ammeter fails or not is determined.
Thirdly, obtaining the line loss value of the station area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target station area.
And a fourth unit for determining whether the line loss value meets a preset condition. Specifically, the line loss value is judged based on a preset condition, if the line loss value meets the preset condition, line loss state information is generated, and if the line loss value does not meet the preset condition, the data of the target station area are circularly acquired.
Fifthly, generating line loss state information; further, in an embodiment of the present invention, after the generating the line loss status information, the method includes: and sending out early warning information corresponding to the line loss state information, wherein the expression form of the early warning information comprises at least one of voice, text and sound effect.
The early warning information may include line loss status information and advice information.
Specifically, early warning information is generated according to the line loss state information, and workers are reminded of carrying out line maintenance on the station area corresponding to the line loss state information. Optionally, the early warning information can be sent to a mobile phone terminal, a tablet computer and a computer. The early warning information can be broadcast in a voice mode, line loss state information and advice information can be displayed in a text mode, and staff can be prompted in a sound effect mode, for example, early warning prompt sound effect is sent out in a mobile phone terminal so as to send out an alarm to the staff. Of course, it may also be displayed in the form of a flashing light. It should be understood that when the early warning information is displayed in a flashing light and sound effect manner, only the prompt effect is provided, and no line loss state information and suggestion information are included.
According to the technical scheme, the voltage data sets and the electricity consumption data sets corresponding to the power dividing meters in the target areas are obtained for each target area, whether the electricity consumption data sets have abnormal data or not is judged based on a preset judging rule, and if so, the abnormal data are removed from the electricity consumption data sets. And obtaining the line loss value of the station area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target station area, judging that the line loss value meets the preset condition, and generating line loss state information. By the technical scheme of the embodiment of the invention, the acquired electricity consumption data set is processed, abnormal data are removed, and the rest structure for calculating the line loss value is ensured to be the same as that of the embodiment 1.
Example 3
Referring to fig. 3, in order to provide an improved line loss calculation system according to the present invention, a line loss calculation method according to any embodiment of the present invention may be implemented, and the improved line loss calculation system includes functional modules and beneficial effects corresponding to the implementation method. The system comprises: the device comprises a data acquisition module, a line loss value calculation module, a judgment module and an information generation module; wherein:
the data acquisition module is used for acquiring a voltage data set and a power consumption data set corresponding to the branch electric meters in each target area; wherein, the station area comprises at least one sub-ammeter; the line loss value calculation module is used for obtaining the line loss value of the station area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target station area; the judging module is used for judging whether the line loss value accords with a preset condition; the information generation module is used for generating line loss state information if yes; the line loss state information includes at least one of a line loss value, a station area corresponding to the line loss value, and a time for obtaining the line loss value.
Further, in an embodiment of the present invention, the data acquisition module is further configured to: periodically acquiring voltage data, and forming a voltage data group based on each voltage data; and periodically acquiring electricity consumption data, and forming an electricity consumption data set based on the electricity consumption data.
Further, in the embodiment of the present invention, the line loss value calculation module is further configured to: calculating a voltage data set, a power consumption data set, a power factor and a line loss coefficient through a line loss formula to obtain line loss; the line loss formula is as follows:
LL is line loss, P is the number of sub-meters in the target area, beta jk As the coefficient of the line loss,
for the electricity consumption of the j ammeter at instant i +.>
For the electricity consumption of the k ammeter at the moment of i, U j For voltages at all moments of j ammeter, U k For the voltage at all times of the k meter, +.>
For the power factor of j ammeter, ">
Is the power factor of k ammeter.
Further, in the embodiment of the present invention, the line loss value calculation module is further configured to: obtaining a line loss formula through a station area loss formula and phase information of alternating current; the area loss formula is as follows:
Δt is a preset interval duration, α ij The coefficient of regularization,
for the power consumption of all sub-meters at time i, < >>
And the electricity consumption of the j ammeter at all moments.
Further, in an embodiment of the present invention, the apparatus further includes: the abnormal data judging module is used for judging whether abnormal data exist in the power consumption data set or not based on a preset judging rule; if yes, the abnormal data are removed from the electricity consumption data set.
Further, in the embodiment of the present invention, the abnormal data determining module is further configured to: and when any electricity consumption value in the electricity consumption data set is 0, judging the electricity consumption data corresponding to the electricity consumption value as abnormal data, wherein the electricity consumption data comprises the electricity consumption value and the electricity consumption value acquisition time.
Further, in an embodiment of the present invention, the apparatus further includes: the early warning information sending module is used for sending early warning information corresponding to the line loss state information, wherein the expression form of the early warning information comprises at least one of voice, text and sound effect.
According to the technical scheme of the embodiment of the invention, the voltage data set and the electricity consumption data set corresponding to the electricity distribution meters in the target area are obtained for each target area, and the line loss value of the area is obtained according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of each target area. And judging whether the line loss value meets a preset condition, and if so, generating line loss state information. The technical scheme of the embodiment of the invention realizes the acquisition of the line loss value of the target station area and improves the accuracy of line loss value calculation.
It should be noted that, each module included in the above system is only divided according to the functional logic, but not limited to the above division, so long as the corresponding function can be implemented; in addition, the specific names of the functional modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the embodiments of the present invention.
The system also includes an electronic device implementing the system, which is embodied in the form of a general purpose computing device. Components of an electronic device may include, but are not limited to: one or more processors or processing units, a system memory, and a bus that connects the different system components (including the system memory and the processing units).
Bus means one or more of several types of bus structures including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, micro channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Electronic devices typically include a variety of computer system readable media. Such media can be any available media that can be accessed by the electronic device and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) and/or cache memory. The electronic device may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, a storage system may be used to read from and write to a non-removable, nonvolatile magnetic medium (not shown in the figures, commonly referred to as a "hard disk drive"), and a magnetic disk drive may be provided for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from and writing to a removable, nonvolatile optical disk such as a CD-ROM, DVD-ROM, or other optical media. In these cases, each drive may be coupled to the bus through one or more data medium interfaces. The memory may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the embodiments of the invention.
A program/utility having a set (at least one) of program modules may be stored, for example, in a memory, such program modules including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules typically carry out the functions and/or methods of the embodiments described herein.
The electronic device may also communicate with one or more external devices (e.g., keyboard, pointing device, display, etc.), with one or more devices that enable a user to interact with the electronic device, and/or with any device (e.g., network card, modem, etc.) that enables the electronic device to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface. And, the electronic device may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through a network adapter. The network adapter communicates with other modules of the electronic device via a bus. It should be appreciated that other hardware and/or software modules may be used in connection with an electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit executes various functional applications and data processing by running a program stored in the system memory, for example, implementing the line loss calculation method provided by the embodiment of the present invention.
Further, embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are for performing a line loss calculation method comprising:
for each target platform area, acquiring a voltage data set and a power consumption data set corresponding to the sub-ammeter in the target platform area; wherein the target area comprises at least one sub-ammeter; obtaining a line loss value of each target station area according to a voltage data set, a power consumption data set, a power factor and a line loss coefficient of the target station area; judging whether the line loss value meets a preset condition or not; if yes, generating line loss state information; the line loss state information comprises at least one of a line loss value, a station area corresponding to the line loss value and a time for obtaining the line loss value.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having 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 portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for embodiments of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (6)
1. A method for improving power grid line loss calculation, characterized by: comprises the steps of,
aiming at a target platform area, acquiring a voltage data set and a power consumption data set corresponding to the sub-ammeter in the target platform area;
obtaining a line loss value of a target platform area according to a voltage data set, a power consumption data set, a power factor and a line loss coefficient of the target platform area;
judging whether the line loss value meets a preset condition or not;
if yes, generating line loss state information;
the method for acquiring the voltage data set and the power consumption data set corresponding to the sub-ammeter in the target station area comprises the following steps:
periodically acquiring voltage data, and forming a voltage data group based on each voltage data;
periodically acquiring electricity consumption data, and forming an electricity consumption data group based on the electricity consumption data;
the preset time interval is 1ms, the acquisition period is 60s, a series of voltage data are obtained, and the voltage and electricity consumption data sets are sequentially arranged according to the acquisition time;
the loss formula of the target station area is as follows:
Δt is a preset interval duration, α kj The coefficient of regularization,
for j electricity consumption of electricity meter at all time points, < >>
U for the electricity consumption of the k ammeter at all moments k Representing the voltage values of all the moments of the k ammeter, U j The voltage values of all moments of the j ammeter are represented;
further comprises:
judging whether abnormal data exists in the electricity consumption data set or not based on a preset judging rule;
if yes, eliminating the abnormal data from the electricity consumption data set;
further comprises:
when any electricity consumption value in the electricity consumption data set is 0, judging that the electricity consumption data corresponding to the electricity consumption value is abnormal data, wherein the electricity consumption data comprises the electricity consumption value and the electricity consumption value acquisition time;
when the electricity consumption value at a certain moment is smaller than the electricity consumption value at the previous moment in the electricity consumption data group arranged according to the time sequence, judging the electricity consumption data at the moment as abnormal data;
the line loss preset range (1% -3% ] corresponds to a first-level overhaul proposal comprising checking the lines of the station area, and the line loss preset range (3% -5% ] corresponds to a second-level overhaul proposal comprising checking each line of the station area and replacing the cables/wires used by the lines correspondingly.
2. A method of improving power grid line loss calculation as in claim 1, wherein: the line loss value is related to a voltage data set, a power consumption data set, a power factor and a line loss coefficient of the target station area, and the line loss formula is as follows:
LL is line loss, P is the number of sub-meters in the target area, beta jk As the coefficient of the line loss,
for the electricity consumption of the j ammeter at instant i +.>
For the electricity consumption of the k ammeter at the moment of i, U j For voltage values at all moments of j ammeter, U k For the voltage at all times of the k meter, +.>
For the power factor of j ammeter, ">
Is the power factor of k ammeter.
3. A method of improving power grid line loss calculation as in claim 2, wherein: according to the line loss formula, the total electricity meter power supply quantity of the station area can be calculated, wherein the total electricity meter power supply quantity is equal to the sum of the accumulated electricity consumption of the branch electricity meters, the fixed loss value of the station area and the sum of the line loss values, and the formula is as follows:
wherein y (i) is the total electricity meter power supply quantity,
for j electricity meter power supply quantity at moment i, e j Estimating the metering error for the branch ammeter, e 0 To fix loss beta jk For the line loss coefficient, P is the number of users in the area, U j For voltage values at all moments of j ammeter, U k For the voltage of all moments of the k ammeter +.>
For the power factor of j ammeter, ">
For the power factor of k ammeter, e k Estimating the metering error for k ammeter,/->
And (5) supplying power to the k ammeter at the moment i.
4. A method of improving power grid line loss calculation as in claim 3, wherein: and after the line loss state information is generated, sending out early warning information corresponding to the line loss state information, wherein the expression form of the early warning information comprises at least one of voice, text and sound effect.
5. An improved line loss calculation system for use in the method of any of claims 1 to 4, comprising:
the data acquisition module is used for acquiring a voltage data set and a power consumption data set corresponding to the branch electric meters in the target area aiming at the target area; wherein the target area comprises at least one sub-ammeter;
the line loss value calculation module is used for obtaining the line loss value of each target station area according to the voltage data set, the electricity consumption data set, the power factor and the line loss coefficient of the target station area;
the judging module is used for judging whether the line loss value accords with a preset condition;
and the information generation module is used for generating line loss state information when the line loss value accords with a preset condition.
6. The improved line loss calculation system of claim 5, wherein: the line loss state information comprises at least one of a line loss value, a station area corresponding to the line loss value and a time for obtaining the line loss value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606681.0A CN115473216B (en) | 2022-05-31 | 2022-05-31 | Method and system for improving power grid line loss calculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606681.0A CN115473216B (en) | 2022-05-31 | 2022-05-31 | Method and system for improving power grid line loss calculation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115473216A CN115473216A (en) | 2022-12-13 |
| CN115473216B true CN115473216B (en) | 2023-06-06 |
Family
ID=84363384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210606681.0A Active CN115473216B (en) | 2022-05-31 | 2022-05-31 | Method and system for improving power grid line loss calculation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115473216B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115619594B (en) * | 2022-12-21 | 2023-03-10 | 南京六的平方信息技术有限公司 | Wisdom management system based on engineering construction equipment power consumption data |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371185A (en) * | 2020-04-17 | 2020-07-03 | 南京大全自动化科技有限公司 | Line loss monitoring system and method based on distribution transformer terminal |
| CN111693795A (en) * | 2020-03-30 | 2020-09-22 | 贵州电网有限责任公司 | Intelligent electric meter-based transformer area line loss rate evaluation and abnormity judgment method |
| CN113435610A (en) * | 2021-06-22 | 2021-09-24 | 国家电网有限公司 | Method for determining grading line loss based on low-voltage Internet of things sensing terminal |
| CN113962504A (en) * | 2021-05-21 | 2022-01-21 | 国网河北省电力有限公司衡水供电分公司 | Power distribution network planning scheme cost-benefit ratio calculation method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995962A (en) * | 2014-05-06 | 2014-08-20 | 国家电网公司 | Online real-time calculation and analysis method of equipped wire loss |
| CN110442625A (en) * | 2019-06-18 | 2019-11-12 | 国网甘肃省电力公司电力科学研究院 | A kind of same period line loss comparative analysis method based on theoretical line loss caluclation |
| CN111612053B (en) * | 2020-05-14 | 2023-06-27 | 国网河北省电力有限公司电力科学研究院 | Calculation method for reasonable interval of line loss rate |
| CN112035784B (en) * | 2020-07-16 | 2024-04-09 | 中国电力科学研究院有限公司 | Method and system for determining loss of low-voltage transformer area based on electricity consumption acquisition data |
| CN112698261A (en) * | 2020-11-25 | 2021-04-23 | 国网湖南省电力有限公司 | Fault early warning method and device for intelligent electric energy meter |
| CN114519514B (en) * | 2022-01-27 | 2023-09-19 | 佰聆数据股份有限公司 | Low-voltage transformer area reasonable line loss value measuring and calculating method, system and computer equipment |
-
2022
- 2022-05-31 CN CN202210606681.0A patent/CN115473216B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693795A (en) * | 2020-03-30 | 2020-09-22 | 贵州电网有限责任公司 | Intelligent electric meter-based transformer area line loss rate evaluation and abnormity judgment method |
| CN111371185A (en) * | 2020-04-17 | 2020-07-03 | 南京大全自动化科技有限公司 | Line loss monitoring system and method based on distribution transformer terminal |
| CN113962504A (en) * | 2021-05-21 | 2022-01-21 | 国网河北省电力有限公司衡水供电分公司 | Power distribution network planning scheme cost-benefit ratio calculation method |
| CN113435610A (en) * | 2021-06-22 | 2021-09-24 | 国家电网有限公司 | Method for determining grading line loss based on low-voltage Internet of things sensing terminal |
Non-Patent Citations (1)
| Title |
|---|
| 配电网线损在线监测系统与计算分析研究;杨柳等;《自动化与仪器仪表》(第1期);25-28页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115473216A (en) | 2022-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109615152B (en) | Wind power generation prediction method and product based on cost-oriented gradient ascending regression tree | |
| CN112528041B (en) | Scheduling term specification verification method based on knowledge graph | |
| CN115473216B (en) | Method and system for improving power grid line loss calculation | |
| CN116544999B (en) | Method, device, equipment and medium for determining installed capacity of energy storage system | |
| CN115049232A (en) | Method and system for judging station area abnormity | |
| CN113268403A (en) | Time series analysis and prediction method, device, equipment and storage medium | |
| CN111461577A (en) | Line loss calculation method, device, equipment and storage medium | |
| CN113743667A (en) | Method, device, equipment and storage medium for predicting power consumption of transformer area | |
| CN112150033A (en) | Express cabinet system management method and device and electronic equipment | |
| CN117332898A (en) | New energy small time scale power time sequence rolling prediction method based on machine learning | |
| CN114548673B (en) | Emission reduction index monitoring method and device | |
| CN115577705A (en) | Method, device and equipment for generating text processing model and storage medium | |
| CN114839554A (en) | Battery alarm method and device, electronic equipment and storage medium | |
| CN114782001A (en) | Power grid infrastructure project optimization method and system based on life cycle cost | |
| CN112560437A (en) | Text smoothness determination method and device and target model training method and device | |
| CN112669077A (en) | Software pricing system | |
| CN112560430B (en) | Error correction method and device for numerical content in text and electronic equipment | |
| CN110826898A (en) | Sorting method, sorting device, computer equipment and storage medium | |
| CN112528183B (en) | Webpage component layout method and device based on big data, electronic equipment and medium | |
| CN114435273B (en) | Engine starting capability determining method and device, electronic equipment and storage medium | |
| CN116991693B (en) | Test method, device, equipment and storage medium | |
| CN112148285B (en) | Interface design method and device, electronic equipment and storage medium | |
| EP4099319A1 (en) | Wake-up index monitoring method and apparatus, and electronic device | |
| CN116992209A (en) | New energy capacity credibility calculation method and device | |
| CN111414398A (en) | Data analysis model determination method and device and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |