CN116169794A - Prompting device and prompting method for power system - Google Patents
Prompting device and prompting method for power system Download PDFInfo
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- CN116169794A CN116169794A CN202310460423.0A CN202310460423A CN116169794A CN 116169794 A CN116169794 A CN 116169794A CN 202310460423 A CN202310460423 A CN 202310460423A CN 116169794 A CN116169794 A CN 116169794A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- 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
- Y04S10/40—Display of information, e.g. of data or controls
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Abstract
The prompting device and the prompting method for the electric power system can display the power consumption of the power distribution circuit of the power transformation and distribution station in a maneuvering way on the time point change by acquiring the regression line I, and can display the power consumption of the power distribution circuit of the power transformation and distribution station in a history way by placing the regression line I and the regression line II in the rectangular coordinate system I for displaying; the reduction critical quantity obtained by the partial criticality of the current harmonic quantity is stronger in compatibility, so that the reduction effect of the current harmonic quantity can be ensured; when the queue of the current harmonic quantity group is cut, the step-by-step cutting is performed through the stop bit in the queue, so that the obtained decrement critical quantity of the queue is more accurate, and the decrement function of executing decrement storage on the current harmonic quantity group through the decrement critical quantity which is more accurate and more compatible is stronger.
Description
Technical Field
The invention belongs to the technical field of power systems, and particularly relates to a prompting device and a prompting method for a power system.
Background
The system is a unified whole formed by secondary facilities such as power generation, power supply (power transmission, transformation and distribution), power utilization facilities, regulation control and relay protection and safety automatic devices, metering devices, dispatching automation, power communication and the like which are required for guaranteeing the normal operation of the power utilization facilities. The power system is an electric energy production and consumption system which is composed of links such as a power plant, a power transmission and transformation circuit, a power supply and distribution station, electricity consumption and the like. The system has the functions of converting primary energy in nature into electric energy through a power generation device, and supplying the electric energy to each user through power transmission, transformation and distribution. In order to realize the function, the power system is also provided with corresponding information and control systems in various links and different levels, and the production process of the electric energy is measured, regulated, controlled, protected, communicated and scheduled so as to ensure that a user obtains safe and high-quality electric energy.
In the operation and maintenance of the power system, monitoring is often performed on the power consumption of the power distribution circuit of the power transformation and distribution station and the current harmonic of the main transformer inlet cabinet line of the power transformation and distribution station, so as to prompt the monitor of the power consumption of the power distribution circuit of the power transformation and distribution station and the current harmonic of the main transformer inlet cabinet line of the power transformation and distribution station.
However, at present, the current harmonic monitoring of the power consumption of the power distribution circuit of the power distribution station and the current harmonic of the main power line cabinet of the power distribution station is simply performed and displayed by the collected power consumption of the power distribution circuit of the power distribution station, the collected power consumption of the main power line cabinet of the power distribution station and the collected current harmonic of the main power line cabinet of the power distribution station, and the collected power consumption of the power distribution circuit of the power distribution station and the collected current harmonic of the main power line cabinet of the power distribution station are not displayed flexibly in time point change, and the collected power consumption of the power distribution circuit of the power distribution station and the collected power consumption of the main power line cabinet of the power distribution station are not displayed in a history.
Compared with the power consumption of a distribution circuit of a power distribution station and the power consumption of a main power inlet cabinet line of the power distribution station, in practical application, the power consumption of the distribution circuit of the power distribution station and the power consumption of the main power inlet cabinet line of the power distribution station are much smaller than the storage amount of a monitoring computer compared with the current harmonic amount of the main power inlet cabinet line, so that when the current harmonic amount is stored, the corresponding storage space is reduced by performing decrement treatment on the current harmonic amount, the current commonly used decrement mode is an LZW algorithm, the current LZW algorithm is adjacent harmonic amount which is the same as the current harmonic amount in the current harmonic amount group, a number of characters are replaced by a signal character representing the current harmonic amount, if the current harmonic amount which is the same continuously is not small, the LZW algorithm has a good decrement function, but the independent harmonic amount in the current harmonic amount group is directly unfavorable for the decrement function after the decrement is performed by using the LZW algorithm; the current harmonic quantity can form a plurality of independent harmonic quantities which are different from adjacent harmonic quantities due to the fluctuation of the current harmonic quantity, so that when the current LZW algorithm is used for carrying out decrement storage on the current harmonic quantity, the current harmonic quantity decrement can not be really achieved, otherwise, the storage space of the current harmonic quantity can be enlarged, and the decrement function is not good.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a prompting device and a prompting method for an electric power system, which are used for acquiring a regression line I, carrying out calculation on the stored power consumption of a power distribution circuit at each collecting time point I in yesterday by using a Levenberg-Marquardt algorithm to acquire a regression line II, and placing the regression line I and the regression line II in a rectangular coordinate system I for display, so that the acquired regression line I can flexibly display the power consumption of the power distribution circuit of a power substation on the time point variation, and the regression line I and the regression line II are placed in the rectangular coordinate system I for display, so that the power consumption of the power distribution circuit of the power substation can be displayed in a history period in a comparison manner; the power consumption of the main transformer inlet cabinet circuit of each month of the current year and the power consumption of the main transformer inlet cabinet circuit of each month of the last year are displayed in a rectangular coordinate system II, so that the power consumption of the main transformer inlet cabinet circuit of the transformer substation can be displayed in a comparison manner in a historical period; and obtaining a regression line III, and placing the regression line III in a rectangular coordinate system III for display, so that the magnitude of the current harmonic of the main transformer inlet cabinet line of the transformer and distribution station can be flexibly displayed on the time point change. In addition, the current harmonic quantity group is divided into a plurality of subgroups to execute analysis, and the key degree analysis of the current harmonic quantity in the subgroups is carried out through the key degree of each subgroup; obtaining the attribute bit and radian between attribute bits of the subgroup to reflect the variation condition of the current harmonic quantity in the subgroup, wherein the obtained subgroup has high key degree reliability; the current harmonic quantity in the sub-group is divided into a current harmonic quantity running high quantity and a current harmonic quantity running low quantity, analysis treatment is respectively carried out on the current harmonic quantities with different fluctuation actions to obtain a running high amplitude and a running low amplitude, the fluctuation condition of the current harmonic quantity in each sub-group can be carefully reflected, partial criticality of each current harmonic quantity in the sub-group is obtained according to the running high amplitude, the running low amplitude and the criticality of the current harmonic quantity in the sub-group, the acquisition of the partial criticality is more accurate, and the fluctuation attribute of the introduced current harmonic quantity is used for executing the calculation of the partial criticality so as to be more fit with the fluctuation attribute of the actual current harmonic quantity; the method also obtains a plurality of queues in the current harmonic quantity group through the preset capacity, obtains the decrement critical quantity of the queues according to the partial criticality of the current harmonic quantity in the queues, has better decrement critical quantity compatibility through the partial criticality of the current harmonic quantity, and can ensure the decrement effect of the current harmonic quantity; when the queue of the current harmonic quantity group is cut, the step-by-step cutting is performed through the stop bit in the queue, so that the obtained decrement critical quantity of the queue is more accurate, and the decrement function of executing decrement storage on the current harmonic quantity group through the decrement critical quantity which is more accurate and more compatible is more correct.
The invention adopts the following technical scheme.
A method of prompting for an electrical power system, comprising:
step 1: the method comprises the steps that an ammeter I of measuring equipment collects power consumption of a power distribution circuit of a power substation and transmits a collection time point I of the power consumption of the power distribution circuit and the power consumption of the power distribution circuit to a controller, an ammeter II of the measuring equipment collects power consumption of a main power inlet cabinet line of the power substation and transmits a collection time point II of the power consumption of the main power inlet cabinet line and the power consumption of the main power inlet cabinet line to the controller, and a current harmonic measuring instrument of the measuring equipment collects current harmonic quantity of the main power inlet cabinet line of the power substation and transmits a collection time point III of the current harmonic quantity of the main power inlet cabinet line and the current harmonic quantity of the main power inlet cabinet line to the controller;
step 2: the controller transmits the power consumption of the power distribution circuit, the power consumption of the main transformer inlet cabinet line of the power distribution station, the collection time point II of the power consumption, the current harmonic quantity of the main transformer inlet cabinet line and the collection time point III of the power consumption of the power distribution circuit, the collection time point II of the power consumption and the collection time point III of the power consumption to the monitoring computer through the wireless communication equipment;
step 3: and the monitoring computer stores the collected power consumption of the power distribution circuit, the power consumption of the main transformer inlet cabinet line of the power distribution station and the current harmonic quantity of the main transformer inlet cabinet line and performs comparison display.
Preferably, the method of control display specifically comprises:
step 3-1-1: the monitoring computer immediately displays the collected power consumption of the power distribution circuit on a display screen thereof, synchronously uses a Levenberg-Marquardt algorithm to execute operation on the power consumption of the power distribution circuit at each collecting time point I in the day to obtain a regression line I, also uses the Levenberg-Marquardt algorithm to execute operation on the stored power consumption of the power distribution circuit at each collecting time point I in the yesterday to obtain a regression line II, and places the regression line I and the regression line II in a rectangular coordinate system I for display;
step 3-1-2: the monitoring computer displays the power consumption of the collected main transformer incoming cabinet circuit on a display screen of the monitoring computer in real time, and obtains the power consumption of the main transformer incoming cabinet circuit in each month of the current year and the power consumption of the main transformer incoming cabinet circuit in each month of the last year according to the power consumption of the collected main transformer incoming cabinet circuit, and then displays the power consumption of the main transformer incoming cabinet circuit in each month of the current year and the power consumption of the main transformer incoming cabinet circuit in each month of the last year in a rectangular coordinate system II in the form of a histogram;
step 3-1-3: the monitoring computer displays the current harmonic quantity of the collected main transformer incoming line cabinet line on a display screen of the monitoring computer in real time, synchronously utilizes the Levenberg-Marquardt algorithm to execute operation on the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point three in the day to obtain a regression line three, and places the regression line three in a rectangular coordinate system three for display.
Preferably, the method for storing the current harmonic quantity of the main transformer incoming line cabinet line comprises the following steps:
step 3-2-1: obtaining a current harmonic quantity group of a main transformer incoming line cabinet line;
step 3-2-2: dividing the current harmonic quantity group into a plurality of subgroups, obtaining radian between attribute bits of each subgroup, and obtaining the criticality of the subgroup according to the radian between the attribute bits;
step 3-2-3: dividing the total current harmonic quantity in the corresponding subgroup into a current harmonic quantity high quantity and a current harmonic quantity low quantity according to attribute bits; respectively obtaining the high-amplitude of the high-amplitude current harmonic wave quantity and the low-amplitude of the low-amplitude current harmonic wave quantity; according to the criticality of the subgroup, the high-level-shift amplitude of the current harmonic quantity and the low-level-shift amplitude of the current harmonic quantity, partial criticality of each current harmonic quantity is respectively obtained;
step 3-2-4: a source queue of a current harmonic quantity group is obtained by using a preset capacity, a decrement critical quantity is obtained according to partial criticality of each current harmonic quantity in the source queue, and a stop bit in the source queue is obtained according to the decrement critical quantity; and obtaining the whole queues in the current harmonic quantity group according to the preset capacity and the pause bit, obtaining the decrement type harmonic quantity of the current harmonic quantity group according to the decrement critical quantity of each queue, and executing storage.
Preferably, the method for dividing the current harmonic quantity group into a plurality of subgroups specifically comprises the following steps:
initially, for a set of current harmonics in a collection period, it includes
The current harmonic quantity is defined as +.>
，/>
Represents->
Collecting period, & lt>
Current harmonic quantity representing first collection time point, < >>
Current harmonic quantity representing second collection time point, < >>
Represents->
Collecting the current harmonic quantity of the time point, namely the number of the current harmonic quantity in the whole current harmonic quantity group; carrying out operation on the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point III of the corresponding collecting time period of the current harmonic quantity group by using a Levenberg-Marquardt algorithm to obtain a corresponding current harmonic quantity regression line;
then, the segmentation is performed on the current harmonic regression line obtained by using the Levenberg-Marquardt algorithm.
Preferably, the method for executing segmentation on the current harmonic quantity regression line obtained by using the Levenberg-Marquardt algorithm specifically comprises the following steps:
the valley points in the current harmonic quantity regression line are used as segmentation limits, a segmented regression line exists among 2 valley points, each segmented regression line has corresponding current harmonic quantity in the current harmonic quantity group, thus each segmented regression line forms a subgroup in the corresponding current harmonic quantity in the current harmonic quantity group, namely a subgroup corresponding regression line, and the subgroup corresponding regression line is a regression line with a single valley top.
A reminder device for an electrical power system, comprising:
the system comprises a measuring device, a controller, a wireless communication device and a monitoring computer, wherein the measuring device and the wireless communication device are connected with the controller, and the controller is in communication connection with the monitoring computer in a wireless network through the wireless communication device;
the measuring equipment comprises an ammeter I, an ammeter II and a current harmonic measuring instrument, wherein the ammeter I is used for collecting the electricity consumption of a power distribution loop of a power substation and transmitting the collecting time point I of the electricity consumption of the power distribution loop and the electricity consumption of the power distribution loop to the controller; the controller is used for transmitting the power consumption of the power distribution circuit and the collection time point I thereof, the power consumption of the main transformer inlet cabinet line of the power distribution station and the collection time point II thereof, the current harmonic quantity of the main transformer inlet cabinet line and the collection time point III thereof to the monitoring computer through the wireless communication equipment.
Preferably, the module running on the monitoring computer comprises a comparison display module for displaying the collected power consumption of the power distribution circuit on a display screen thereof in real time, synchronously executing operation on the power consumption of the power distribution circuit at each collecting time point I of the day by using a Levenberg-Marquardt algorithm to obtain a regression line I, executing operation on the stored power consumption of the power distribution circuit at each collecting time point I of the yesterday by using the Levenberg-Marquardt algorithm to obtain a regression line II, and displaying the regression line I and the regression line II in a rectangular coordinate system I; the power consumption of the collected main transformer incoming cabinet lines is displayed on a display screen in real time, the power consumption of the main transformer incoming cabinet lines in each month of the current year and the power consumption of the main transformer incoming cabinet lines in each month of the last year are obtained according to the power consumption of the collected main transformer incoming cabinet lines, and then the power consumption of the main transformer incoming cabinet lines in each month of the current year and the power consumption of the main transformer incoming cabinet lines in each month of the last year are displayed in a rectangular coordinate system II; and (3) immediately displaying the current harmonic quantity of the collected main transformer incoming line cabinet line on a display screen of the main transformer incoming line cabinet line, synchronously operating the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point III on the day by using a Levenberg-Marquardt algorithm to obtain a regression line III, and displaying the regression line III in a rectangular coordinate system III.
Preferably, the module running on the monitoring computer further comprises a storage module for acquiring a current harmonic quantity group of the main transformer incoming line cabinet line; dividing the current harmonic quantity group into a plurality of subgroups, obtaining radian between attribute bits of each subgroup, and obtaining the criticality of the subgroup according to the radian between the attribute bits; dividing the total current harmonic quantity in the corresponding subgroup into a current harmonic quantity high quantity and a current harmonic quantity low quantity according to attribute bits; respectively obtaining the high-amplitude of the high-amplitude current harmonic wave quantity and the low-amplitude of the low-amplitude current harmonic wave quantity; according to the criticality of the subgroup, the high-level-shift amplitude of the current harmonic quantity and the low-level-shift amplitude of the current harmonic quantity, partial criticality of each current harmonic quantity is respectively obtained; a source queue of a current harmonic quantity group is obtained by using a preset capacity, a decrement critical quantity is obtained according to partial criticality of each current harmonic quantity in the source queue, and a stop bit in the source queue is obtained according to the decrement critical quantity; and obtaining the whole queues in the current harmonic quantity group according to the preset capacity and the pause bit, obtaining the decrement type harmonic quantity of the current harmonic quantity group according to the decrement critical quantity of each queue, and executing storage.
Preferably, the storage module is further configured to store, for a collection period, a set of current harmonics including
The current harmonic quantity is defined as +.>
，/>
Represents->
Collecting period, & lt>
Current harmonic quantity representing first collection time point, < >>
Current harmonic quantity representing second collection time point, < >>
Represents->
Collecting the current harmonic quantity of the time point, namely the number of the current harmonic quantity in the whole current harmonic quantity group; applying a Levenberg-Marquardt algorithm to a set of current harmonics for each respective collection period of the set of current harmonicsCollecting the current harmonic quantity of the main transformer incoming cabinet line at the third time, and performing operation to obtain a corresponding current harmonic quantity regression line; then, the segmentation is performed on the current harmonic regression line obtained by using the Levenberg-Marquardt algorithm.
Preferably, the storage module is further configured to use valley points in the current harmonic quantity regression line as a segmentation limit, there is a segmented regression line between 2 valley points, each segmented regression line has a corresponding current harmonic quantity in the current harmonic quantity group, so that each segmented regression line forms a subgroup in the current harmonic quantity group, that is, a subgroup corresponds to a regression line, and the subgroup corresponds to a regression line having a single valley top.
Compared with the prior art, the invention has the beneficial effects that the regression line I is obtained, the calculation is also carried out on the power consumption of the power distribution circuit stored at each collecting time I in yesterday by using the Levenberg-Marquardt algorithm to obtain the regression line II, the regression line I and the regression line II are placed in the rectangular coordinate system I for display, so that the power consumption of the power distribution circuit of the power transformation and distribution station can be flexibly displayed on the time point variation by obtaining the regression line I, and the power consumption of the power distribution circuit of the power transformation and distribution station can be displayed in the rectangular coordinate system I for comparison and display on the history period by placing the regression line I and the regression line II; the power consumption of the main transformer inlet cabinet circuit of each month of the current year and the power consumption of the main transformer inlet cabinet circuit of each month of the last year are displayed in a rectangular coordinate system II, so that the power consumption of the main transformer inlet cabinet circuit of the transformer substation can be displayed in a comparison manner in a historical period; and obtaining a regression line III, and placing the regression line III in a rectangular coordinate system III for display, so that the magnitude of the current harmonic of the main transformer inlet cabinet line of the transformer and distribution station can be flexibly displayed on the time point change. In addition, the current harmonic quantity group is divided into a plurality of subgroups to execute analysis, and the key degree analysis of the current harmonic quantity in the subgroups is carried out through the key degree of each subgroup; obtaining the attribute bit and radian between attribute bits of the subgroup to reflect the variation condition of the current harmonic quantity in the subgroup, wherein the obtained subgroup has high key degree reliability; the current harmonic quantity in the sub-group is divided into a current harmonic quantity running high quantity and a current harmonic quantity running low quantity, analysis treatment is respectively carried out on the current harmonic quantities with different fluctuation actions to obtain a running high amplitude and a running low amplitude, the fluctuation condition of the current harmonic quantity in each sub-group can be carefully reflected, partial criticality of each current harmonic quantity in the sub-group is obtained according to the running high amplitude, the running low amplitude and the criticality of the current harmonic quantity in the sub-group, the acquisition of the partial criticality is more accurate, and the fluctuation attribute of the introduced current harmonic quantity is used for executing the calculation of the partial criticality so as to be more fit with the fluctuation attribute of the actual current harmonic quantity; the method also obtains a plurality of queues in the current harmonic quantity group through the preset capacity, obtains the decrement critical quantity of the queues according to the partial criticality of the current harmonic quantity in the queues, has better decrement critical quantity compatibility through the partial criticality of the current harmonic quantity, and can ensure the decrement effect of the current harmonic quantity; when the queue of the current harmonic quantity group is cut, the step-by-step cutting is performed through the stop bit in the queue, so that the obtained decrement critical quantity of the queue is more accurate, and the decrement function of executing decrement storage on the current harmonic quantity group through the decrement critical quantity which is more accurate and more compatible is more correct.
Drawings
FIG. 1 is a flow chart of steps 1 to 3 of the present invention;
FIG. 2 is a partial component block diagram of a power system reminder device according to the present invention;
FIG. 3 is a flow chart of steps 3-1-1 through 3-1-3 of the present invention;
FIG. 4 is a flow chart of steps 3-2-1 through 3-2-4 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely expressed with reference to the drawings in the embodiments of the present invention. The embodiments expressed in this application are merely examples of some, but not all, of the inventions. Based on the spirit of the present invention, one of ordinary skill in the art would obtain additional embodiments without inventive faculty, all falling within the scope of the invention.
As shown in fig. 1, the prompting method for a power system according to the present invention includes:
step 1: the method comprises the steps that an ammeter I of measuring equipment collects power consumption of a power distribution circuit of a power substation and transmits a collection time point I of the power consumption of the power distribution circuit and the power consumption of the power distribution circuit to a controller, an ammeter II of the measuring equipment collects power consumption of a main power inlet cabinet line of the power substation and transmits a collection time point II of the power consumption of the main power inlet cabinet line and the power consumption of the main power inlet cabinet line to the controller, and a current harmonic measuring instrument of the measuring equipment collects current harmonic quantity of the main power inlet cabinet line of the power substation and transmits a collection time point III of the current harmonic quantity of the main power inlet cabinet line and the current harmonic quantity of the main power inlet cabinet line to the controller; the collection time point is the time point when the corresponding measuring device collects the corresponding amount.
Step 2: the controller transmits the power consumption of the power distribution circuit, the power consumption of the main transformer inlet cabinet line of the power distribution station, the collection time point II of the power consumption, the current harmonic quantity of the main transformer inlet cabinet line and the collection time point III of the power consumption of the power distribution circuit, the collection time point II of the power consumption and the collection time point III of the power consumption to the monitoring computer through the wireless communication equipment; the power consumption of the power distribution circuit, the power consumption of the main transformer inlet cabinet line of the power distribution station and the current harmonic quantity of the main transformer inlet cabinet line are all transmitted to the monitoring computer according to the sequence of the collected time points.
Step 3: and the monitoring computer stores the collected power consumption of the power distribution circuit, the power consumption of the main transformer inlet cabinet line of the power distribution station and the current harmonic quantity of the main transformer inlet cabinet line and performs comparison display.
In a preferred but non-limiting embodiment of the present invention, as shown in fig. 3, the method for comparison display specifically comprises:
step 3-1-1: the monitoring computer immediately displays the collected power consumption of the power distribution circuit on a display screen thereof, synchronously uses a Levenberg-Marquardt algorithm to execute operation on the power consumption of the power distribution circuit at each collecting time point I in the day to obtain a regression line I, also uses the Levenberg-Marquardt algorithm to execute operation on the stored power consumption of the power distribution circuit at each collecting time point I in the yesterday to obtain a regression line II, and places the regression line I and the regression line II in a rectangular coordinate system I for display; the X axis of the rectangular coordinate system is the time point, and the Y axis is the power consumption of the power distribution circuit.
Step 3-1-2: the monitoring computer displays the power consumption of the collected main transformer incoming cabinet circuit on a display screen of the monitoring computer in real time, and obtains the power consumption of the main transformer incoming cabinet circuit in each month of the current year and the power consumption of the main transformer incoming cabinet circuit in each month of the last year according to the power consumption of the collected main transformer incoming cabinet circuit, and then displays the power consumption of the main transformer incoming cabinet circuit in each month of the current year and the power consumption of the main transformer incoming cabinet circuit in each month of the last year in a rectangular coordinate system II in the form of a histogram; the X axis of the rectangular coordinate system II is month, and the Y axis is the electricity consumption of the main transformer incoming line cabinet circuit. The method for obtaining the electricity consumption of the main transformer incoming cabinet line of each month of the current year and the electricity consumption of the main transformer incoming cabinet line of each month of the last year according to the collected electricity consumption of the main transformer incoming cabinet line comprises the following steps: the electricity consumption of the main transformer incoming cabinet line collected in the last round of each month of the current year (the last round is the time point of the last month) is subtracted by the electricity consumption of the main transformer incoming cabinet line collected in the last round of the last month of the current year, the obtained electricity consumption is taken as the electricity consumption of the main transformer incoming cabinet line in each month of the current year, and the obtained electricity consumption is taken as the electricity consumption of the main transformer incoming cabinet line in each month of the current year.
Step 3-1-3: the monitoring computer displays the current harmonic quantity of the collected main transformer incoming line cabinet line on a display screen of the monitoring computer in real time, synchronously utilizes the Levenberg-Marquardt algorithm to execute operation on the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point three in the day to obtain a regression line three, and places the regression line three in a rectangular coordinate system three for display. The X axis of the rectangular coordinate system III is the time point, and the Y axis is the current harmonic quantity of the main transformer incoming line cabinet circuit.
In a preferred but non-limiting embodiment of the present invention, as shown in fig. 4, a method for storing current harmonic content of a main transformer incoming line cabinet line includes:
step 3-2-1: obtaining a current harmonic quantity group of a main transformer incoming line cabinet line;
compared with the power consumption of the distribution circuit of the power substation and the power consumption of the main transformer inlet cabinet line of the power substation, in practical application, the power consumption of the distribution circuit of the power substation and the power consumption of the main transformer inlet cabinet line of the power substation are much less than the current harmonic quantity of the main transformer inlet cabinet line, and then the corresponding storage space is reduced by performing decrement treatment on the current harmonic quantity when the current harmonic quantity exists.
According to the method, 1min is used as a collecting period, the current harmonic quantity of the main transformer incoming cabinet circuit in each collecting period is obtained, the collecting rate of the current harmonic quantity of the main transformer incoming cabinet circuit is 1ms, the current harmonic quantity of the main transformer incoming cabinet circuit is collected, and then a current harmonic quantity group formed by a plurality of current harmonic quantities can be obtained in the collecting period.
In general cases, the current harmonic quantity of the main transformer incoming cabinet line (the current harmonic quantity can be the set main transformer incoming cabinet line
Sub-current harmonic value, ">
An integer higher than one) is often located just like +.>
In the category of (2), the current harmonic quantity of the main transformer incoming line cabinet circuit is accompanied with a plurality of independent harmonic quantities in a collecting period, namely, the current harmonic quantity is different from the adjacent current harmonic quantity, and the current harmonic quantity group is not good in decrement efficiency by applying the conventional LZW algorithm, so that the current harmonic quantity group is taken as analysis after execution of objects to be decremented.
Step 3-2-2: dividing the current harmonic quantity group into a plurality of subgroups, obtaining radian between attribute bits of each subgroup, and obtaining the criticality of the subgroup according to the radian between the attribute bits;
in general, the elements forming the fluctuation of the current harmonic quantity group are not few, and the elements such as the load increase and decrease, the voltage fluctuation, the current fluctuation and the like of the main transformer incoming line cabinet circuit can form the fluctuation of the current harmonic quantity, so that the fluctuation of the current harmonic quantity of a user is not low within 1 min; the current harmonic quantity in the current harmonic quantity group is not small, and because the fluctuation of the current harmonic quantity is not low, the current harmonic quantity group often has not small independent harmonic quantity, so that the analysis of the current harmonic quantity group is facilitated, the current harmonic quantity group is divided into a plurality of subgroups according to the fluctuation condition of the current harmonic quantity group, and the analysis of each subgroup is performed.
Carrying out operation on the current harmonic quantities of the main transformer inlet cabinet circuit at each collecting time point III of the collecting period by using a Levenberg-Marquardt algorithm to obtain corresponding current harmonic quantity regression lines; and obtaining all valley points in the current harmonic quantity regression line, dividing the current harmonic quantity regression line into more than one regression line by using each valley point as a dividing limit, and obtaining corresponding subgroups in the current harmonic quantity groups corresponding to each divided regression line.
In a preferred but non-limiting embodiment of the present invention, a method for splitting a set of current harmonics into subsets, specifically comprises:
initially, for a set of current harmonics in a collection period, it includes
The current harmonic quantity is defined as +.>
，/>
Represents->
Collecting period, & lt>
Representing the current harmonic content at the first collection point,/>
current harmonic quantity representing second collection time point, < >>
Represents->
Collecting the current harmonic quantity of the time point, namely the number of the current harmonic quantity in the whole current harmonic quantity group; the inner interval of 1ms is a collecting time point, a Levenberg-Marquardt algorithm is applied to a current harmonic quantity group, the current harmonic quantity of a main transformer inlet cabinet circuit of each collecting time point three of a corresponding collecting time period of the current harmonic quantity group is operated to obtain a corresponding current harmonic quantity regression line, the X axis of a rectangular coordinate system where the current harmonic quantity regression line is located is a different collecting time point, and the Y axis is the corresponding current harmonic quantity of each collecting time point; the collection points here are all collection points three.
Then, the segmentation is performed on the current harmonic regression line obtained by using the Levenberg-Marquardt algorithm.
In a preferred but non-limiting embodiment of the present invention, the method for performing segmentation on the current harmonic quantity regression line obtained by using the Levenberg-Marquardt algorithm specifically comprises:
the valley points in the current harmonic quantity regression line are used as segmentation limits, a segmented regression line exists among 2 valley points, each segmented regression line has corresponding current harmonic quantity in the current harmonic quantity group, thus each segmented regression line forms a subgroup in the corresponding current harmonic quantity in the current harmonic quantity group, namely a subgroup corresponding regression line, and the subgroup corresponding regression line is a regression line with a single valley top.
In general, the current harmonic quantity of the main transformer incoming line cabinet line is always stable, so that the current harmonic quantity is always gradually increased or decreased in a gradual flow under the general condition, when the harmonic quantity of the current harmonic quantity suddenly changed occurs, the harmonic quantity is analyzed in a focusing mode, so that the criticality of the harmonic quantity is not low, and when the current harmonic quantity is reduced later, the critical quantity of the reduced current harmonic quantity is not high, the accuracy of the reduced data is ensured, and the critical quantity of the reduced current harmonic quantity is not high, and the critical quantity of the reduced current harmonic quantity is not low, so that the analysis of the criticality of each current harmonic quantity in the sub-group is performed.
In a preferred but non-limiting embodiment of the present invention, a method for obtaining criticality of a subgroup specifically comprises:
initially, obtaining the criticality of the sub-group, wherein the regression line corresponding to each sub-group is a regression line of a valley top, so that a valley top can be obtained in the regression line corresponding to the sub-group; the start point, the valley point and the end point in the corresponding regression line of the subgroup are attribute bit one, attribute bit two and attribute bit three respectively.
Thus, the first regression line and the last regression line obtained by splitting the current harmonic quantity regression line often have no valley points, so for the first regression line and the last regression line, if there are no valley points, the attribute bits of the corresponding subgroup are the start point and the end point on the regression line.
Then, radian among attribute bits is obtained, wherein the radian among attribute bits comprises radian I and radian II;
in a preferred but non-limiting embodiment of the present invention, a method for obtaining radians between attribute bits, specifically comprises: on the regression lines corresponding to the subgroups, the current harmonic quantity corresponding to the regression line segment between the starting point and the valley point is treated by a gradient descent method to obtain a linear regression line, a smaller radian formed between the linear regression line and the transverse direction is obtained, and the radian is defined as radian one; similarly, the current harmonic quantity corresponding to the regression line between the valley point and the end point on the regression line corresponding to the subgroup is treated by a gradient descent method to obtain a linear regression line, a smaller radian formed between the linear regression line and the transverse direction is obtained, and the radian is defined as a radian two.
And then, obtaining the criticality of the subgroup according to the attribute bit and radian among the attribute bits in the regression line corresponding to the subgroup.
In a preferred but non-limiting embodiment of the present invention, the criticality calculation formula is:
here the number of the elements is the number,
represents a criticality; />
Representative subgroup->
The first attribute harmonic quantity of (2), namely the current harmonic quantity corresponding to the starting point in the regression line corresponding to the subgroup; />
Representative subgroup->
The second attribute harmonic quantity, namely the current harmonic quantity corresponding to the valley point in the regression line corresponding to the subgroup; />
Representative subgroup->
Three, namely the current harmonic quantity corresponding to the end point in the regression line corresponding to the subgroup; />
Representing radian I, namely radian between the starting point and the valley vertex in the regression line corresponding to the subgroup; />
Representing radian II, namely radian between Gu Dingdian and the end point in the regression line corresponding to the subgroup;/>
represents the standard deviation one; />
Representing a second standard deviation; />
Representing the parameter +.>
A dispersion normalization operation is performed.
In a preferred, but non-limiting embodiment of the present invention, the method for obtaining the first standard deviation comprises: because the current harmonic quantity in the subgroup is correspondingly related to the point on the regression line, the attribute harmonic quantity corresponding to the attribute bit I, the attribute bit II and the attribute bit III can be correspondingly obtained in the subgroup, the interval quantity between each adjacent two current harmonic quantities between the attribute harmonic quantity I and the attribute harmonic quantity II is calculated, and then the standard deviation of the interval quantity between the adjacent two current harmonic quantities between the attribute harmonic quantity I and the attribute harmonic quantity II is obtained, wherein the standard deviation is the standard deviation I; the amount of separation between the two current harmonics is the amount of the current harmonic of which the amount is higher, minus the other current harmonic.
Similarly, the method for obtaining the second standard deviation comprises the following steps: calculating the interval between each adjacent two current harmonic quantity between the attribute harmonic quantity II and the attribute harmonic quantity III, and then obtaining the standard deviation of the interval between the adjacent two current harmonic quantities of the whole of the attribute harmonic quantity II and the attribute harmonic quantity III, wherein the standard deviation is the standard deviation II.
In a preferred but non-limiting embodiment of the present invention, since the subgroup corresponding to the first regression line and the subgroup corresponding to the last regression line often have no valley points, that is, the first regression line and the last regression line are in an increasing or decreasing state, the calculation formula of the criticality of the corresponding subgroup is:
Here the number of the elements is the number,
represents a criticality; />
Representing the highest current harmonic quantity on the corresponding regression line of the subgroup; />
Representing the lowest current harmonic quantity on the corresponding regression line of the subgroup, wherein the point of the highest current harmonic quantity corresponding to the lowest current harmonic quantity is the starting point or the end point on the regression line; />
Representing radian, the obtaining method is similar to the radian I and the radian II, a linear regression line is obtained by treating the current harmonic quantity between the starting point and the end point on the corresponding regression line of the subgroup by using a gradient descent method, and the smaller radian formed between the linear regression line and the transverse direction is obtained, wherein the radian is ++>
The higher the radian value is, the higher the speed of current harmonic quantity variation in the subgroup is represented; />
Representing standard deviation, its acquisition method is similar to standard deviation one and standard deviation two, and its channel subgroupObtaining the interval quantity of all adjacent current harmonic quantities between the first current harmonic quantity and the last current harmonic quantity in the subgroup, namely deriving a standard deviation from the interval quantity of all adjacent current harmonic quantities between the first current harmonic quantity and the last current harmonic quantity in the subgroup, wherein the higher the standard deviation is, the higher the fluctuation of the current harmonic quantity in the subgroup is represented, and the poor the smoothness of the current harmonic quantity in the subgroup is; / >
Representing the parameter +.>
Performing a dispersion normalization operation; />
The function of multiplying by the constant by two is to ensure that the respective criticality amounts of the subgroups are similar.
Step 3-2-3: dividing the total current harmonic quantity in the corresponding subgroup into a current harmonic quantity high quantity and a current harmonic quantity low quantity according to attribute bits; respectively obtaining the high-amplitude of the high-amplitude current harmonic wave quantity and the low-amplitude of the low-amplitude current harmonic wave quantity; according to the criticality of the subgroup, the high-level-shift amplitude of the current harmonic quantity and the low-level-shift amplitude of the current harmonic quantity, partial criticality of each current harmonic quantity is respectively obtained;
in a preferred but non-limiting embodiment of the present invention, the current harmonic quantity group is divided into a plurality of subgroups by step 3-2-2, and each subgroup corresponds to a regression line at the valley top, so that a high current harmonic quantity running amount and a low current harmonic quantity running amount can be identified on the regression line corresponding to each subgroup, the current harmonic quantity between the starting point and the valley top on the regression line corresponding to the subgroup in the present application is defined as a current harmonic quantity running amount, and the current harmonic quantity running amount comprises Gu Dingdian; the current harmonic quantity between the valley point and the end point on the regression line corresponding to the subgroup is defined as the current harmonic quantity low quantity which does not contain Gu Dingdian; the stage of high current harmonic quantity and low current harmonic quantity are often generated in a collecting period, the stage of high current harmonic quantity and the stage of low current harmonic quantity are similar, the stage of high current harmonic quantity and the stage of low current harmonic quantity are very obvious in difference, the precision of current harmonic analysis is improved, the extra current harmonic quantity is considered with higher emphasis, the reduced current harmonic quantity is precise, and therefore, partial criticality of each current harmonic quantity is obtained according to the relation between the different current harmonic quantity and the current harmonic quantity;
If the first regression line and the last regression line have no valley points, the first regression line is represented as a state that the current harmonic quantity continuously goes low, and the last regression line is represented as a state that the current harmonic quantity continuously goes high, namely the current harmonic quantity in the first regression line is represented as the current harmonic quantity low, and the current harmonic quantity in the last regression line is represented as the current harmonic quantity high;
obtaining a first standard deviation of a high current harmonic quantity and a second standard deviation of a low current harmonic quantity; the standard deviation is multiplied by the radian to obtain a quantity with a high amplitude; the standard deviation is multiplied by radian two to get a quantity of low amplitude.
Just like the acquisition of the high-going amplitude of the high-going quantity of the current harmonic quantity and the low-going amplitude of the low-going quantity of the current harmonic quantity corresponding to the subgroup, the high-going amplitude is:
，/>
representing walking high amplitude +.>
Representing radian between the starting point and the valley point in the corresponding regression line of the subgroup, namely radian I, which is used for representing the high speed of current harmonic quantity between the starting point and the valley point in the corresponding regression line of the subgroup, wherein the higher the radian I quantity is, the higher the speed of current harmonic quantity is; />
Representing standard deviation one, representing fluctuation between the total current harmonics between the starting point and the valley point, i.e. the total current harmonics in the subgroup Fluctuation among wave quantity traveling high quantities is obtained by taking the standard deviation of all adjacent current harmonic quantity traveling high quantities at intervals, the higher the standard deviation is, the higher the fluctuation quantity among the current harmonic quantities is, and the stability of the harmonic quantity is poor in the period of the current harmonic quantity traveling high quantities; the walk-down amplitude is: />
，/>
Representing walk low amplitude, +.>
Representing radian between Gu Dingdian and the end point in the regression line corresponding to the subgroup, namely radian II, which is used for representing the rate of current harmonic quantity falling between Gu Dingdian and the end point in the regression line corresponding to the subgroup, wherein the higher the radian II quantity is, the higher the rate of current harmonic quantity falling is; />
Representing the second standard deviation, the fluctuation of the total current harmonic quantity between Gu Dingdian and the end point, namely the fluctuation of the total current harmonic quantity in the subgroup, which is obtained by measuring the standard deviation of the total current harmonic quantity at intervals of the total adjacent current harmonic quantity, wherein the higher the standard deviation is, the higher the fluctuation quantity between the current harmonic quantities is, and the poor stability of the harmonic quantity is during the period of the current harmonic quantity being low.
The method comprises the steps of dividing a subgroup into a current harmonic quantity high-going quantity and a current harmonic quantity low-going quantity according to three attribute bits in corresponding regression lines of each subgroup, and obtaining partial criticality of a current harmonic quantity sequence according to the high-going quantity and the low-going quantity of each subgroup after obtaining the high-going quantity and the low-going quantity of the current harmonic quantity in each subgroup; the method comprises the steps of taking random current harmonic quantity in current harmonic quantity traveling high quantities of current subgroups as target quantity, selecting other current harmonic quantity traveling high quantities with the same current harmonic quantity as the target quantity, defining the selected current harmonic quantity traveling high quantities into corresponding subgroups, obtaining partial criticality of the target quantity according to the traveling high amplitude of the current harmonic quantity traveling high quantities of the corresponding subgroups and the criticality of the subgroup where the target quantity is located, obtaining interval quantity between the traveling high amplitude of the current harmonic quantity corresponding to the target quantity and the traveling high amplitude of the current harmonic quantity traveling high quantities in the corresponding subgroups, obtaining negative first power after each interval quantity is increased, integrating all reciprocal values and adding negative numbers to combine Euler numbers to execute power operation, and obtaining the quantity after power operation and multiplying the obtained quantity by the criticality of the subgroup corresponding to the target quantity.
In a preferred but non-limiting embodiment of the present invention, the partial criticality calculation formula is:
here the number of the elements is the number,
a portion of criticality representing the amount of interest; />
Representing the criticality of the subgroup in which the quantity of interest is located; />
Representing the number of subgroups with the same amount of current harmonics as the target amount, i.e. the number of corresponding subgroups; />
A step-up amplitude representing a step-up amount of the current harmonic quantity at which the target quantity is located; />
Represents->
The current harmonic quantity of each corresponding subgroup is high by a high quantity; />
Representing Euler number;
In the above manner, the partial criticality corresponding to each current harmonic in the current sub-group current harmonic running high amount can be obtained, the partial criticality of each current harmonic in the current harmonic running low amount is obtained according to the same manner as the partial criticality of each current harmonic in the current harmonic running high amount is obtained, when the partial criticality of each current harmonic in the current harmonic running low amount is obtained, the operation is performed for the running low amplitude corresponding to the current harmonic running low amount, the random current harmonic in the bar current harmonic running low amount is defined as the harmonic to be treated, another current harmonic running low amount with the same current harmonic as the harmonic to be treated is selected, and the sub-group with the selected current harmonic running low amount is defined as the adaptive group; obtaining the interval quantity between the walk-down amplitude of the walk-down quantity of the current harmonic quantity to be treated and the walk-down amplitude of the walk-down quantity of the current harmonic quantity in each adaptation group, obtaining the negative first power after the increment of each interval quantity, adding the minus sign to the accumulation of the whole reciprocal to combine with the Euler number to execute the power operation, wherein the quantity obtained after the power operation is multiplied by the criticality of the subgroup corresponding to the target quantity is the partial criticality of the target quantity.
According to the method of obtaining the partial criticality of the current harmonic quantity in one subgroup, the partial criticality of the total current harmonic quantity in the other subgroup is obtained, so that the partial criticality of the total current harmonic quantity in the current harmonic quantity group is obtained, and a partial criticality group is formed:
，/>
represents->
Collecting period, & lt>
Part of the criticality of the current harmonic quantity representing the first collection point, < ->
Current harmonic quantity representing second collection time pointPart of the criticality,/->
Represents the first
A portion of the criticality of the current harmonic content of the time point is collected.
Step 3-2-4: a source queue of a current harmonic quantity group is obtained by using a preset capacity, a decrement critical quantity is obtained according to partial criticality of each current harmonic quantity in the source queue, and a stop bit in the source queue is obtained according to the decrement critical quantity; and obtaining the whole queues in the current harmonic quantity group according to the preset capacity and the pause bit, obtaining the decrement type harmonic quantity of the current harmonic quantity group according to the decrement critical quantity of each queue, and executing storage.
Because the current LZW algorithm has poor function of reducing independent harmonic quantity and the current harmonic quantity group often has a plurality of independent harmonic quantity which is different from adjacent current harmonic quantity, when the current LZW algorithm is used for treatment, an independent harmonic quantity is formed into a capacity field and a current harmonic quantity, and the storage capacity is increased, the capacity field is not given to the independent harmonic quantity, the capacity field during the reduction is equivalent to a bit stream, and the highest capacity is constrained to be 2 4 Then the capacity field of the correct harmonic quantity after the LZW algorithm is applied is a 1-bit quantity, and the current harmonic quantity is a plurality of bits according to the real collection condition, so when the LZW algorithm is demodulated, when the last quantity adjacent to the current non-one bit quantity in the LZW algorithm is also a non-1-bit quantity, the current harmonic quantity corresponding to the current non-1-bit quantity is an independent harmonic quantity, and the capacity of the independent harmonic quantity is one; when the last amount adjacent to the current non-1-bit amount is not the non-1-bit amount in the LZW algorithm, the current harmonic amount corresponding to the current non-1-bit amount is a non-independent harmonic amount.
Thus, because the present application sets the maximum capacity of the LZW algorithm to be 2 4 When analyzing the current harmonic quantity group, a capacity of 2 is set 4 And the highest decrement threshold of the set queue is ten, 2 according to the capacity 4 Can be in the queue ofThe current harmonic quantity group is migrated to obtain a plurality of queues, the use capacity is 2 4 The analysis is performed on a source queue obtained by first moving back on the current harmonic quantity group, wherein the current harmonic quantity in the source queue is 2 in front of the head in the current harmonic quantity group 4 Obtaining the reduction critical quantity in the source queue according to the partial criticality of the total current harmonic quantity in the source queue, obtaining the average value of the partial criticality corresponding to the total current harmonic quantity in the source queue, and taking the quantity obtained by subtracting the constant value from the average value as the fluctuation quantity; the fluctuation amount is multiplied by a preset maximum decrement threshold amount and the decrement threshold amount of the source queue is obtained by downward integer.
In a preferred but non-limiting embodiment of the present invention, the formula for the decrement threshold of the source queue is:
here the number of the elements is the number,
representing a deweighting threshold for the source queue; />
Represents the%>
Partial criticality of current harmonic quantity; />
The higher the average value of the partial criticality representing the total current harmonic quantity in the source queue, the higher the partial criticality representing each current harmonic quantity in the source queue, and the lower the critical quantity is given for the more critical current harmonic quantity, so as to ensure that the loss of critical current harmonic quantity decrement is not high, so that>
The higher the amount of (2), the more the fluctuation amount
The lower the amount of (2), the corresponding +.>
The lower the amount of (c), the ten is the highest decrement critical amount set in the present application. />
Correspondingly, when the part of the criticality of each current harmonic quantity in the source queue is not high, the higher the corresponding decrement critical quantity of the source queue is, the decrement function of each current harmonic quantity in the source queue is improved.
Then, a stop bit is obtained according to the decrement threshold of the source queue, and the stop bit and the preset capacity 2 are used 4 Obtaining a later queue in the current harmonic quantity group, and performing decrement storage on each current harmonic quantity in each queue; calculating the interval between the first current harmonic quantity in the source queue and the second current harmonic quantity in the source queue, and if the interval is lower than the decrement threshold, calculating the average of the first current harmonic quantity and the second current harmonic quantity in the source queue and integrating the first current harmonic quantity and the second current harmonic quantity downwards (downwards integers means that 
Operator to operate) to obtain a new quantity; calculating the interval between the new quantity and the third current harmonic quantity in the source queue, and if the interval is lower than the decrement critical quantity, calculating the mean value of the third current harmonic quantity in the new quantity endogenous queue and obtaining a closer new quantity in an downward integer mode; and calculating the interval between the new quantity and the fourth current harmonic quantity in the source queue, wherein the current harmonic quantity when the interval is not lower than the decrement critical quantity is continuously obtained as a reference quantity, and the last current harmonic quantity of the reference quantity in the source queue is a stop bit.
The method for taking the stall bit with the source queue example is: at the beginning, the interval between the first current harmonic quantity and the second current harmonic quantity in the source queue is determined to be not lower than the decrement critical quantity
When the first current harmonic quantity is determined
And second current harmonic quantity->
Likewise, the first current harmonic quantity is calculated>
And second current harmonic quantity->
The mean value between them is then integer downwards to obtain the new value +.>
Then, the new amount ++>
And third current harmonic quantity->
The amount of the interval between is not lower than the decrement threshold>
In->
When the new amount is determined->
Just as the third current harmonic quantity, the new quantity is +>
And the third current harmonic quantity is again derived to average value and is further integrated downwards to obtain a more recent new quantity, then the new quantity and the fourth current harmonic quantity are identified, and the method is continued until the interval quantity between the new quantity and the current harmonic quantity is not lower than the decrement critical quantity- >
Obtaining a pause bit, and if the interval between the new current harmonic and the fourth current harmonic is not lower than a decrement threshold, determining that the fourth current harmonic is a reference current, determining that the reference current is a source queueThe last current harmonic in the column is the dwell bit, i.e., the third current harmonic is the dwell bit.
Using the adjacent next current harmonic quantity of the pause bit as a starting point quantity, and using the position of the starting point quantity in the current harmonic quantity group as a first harmonic quantity to obtain a new queue (the harmonic quantity in the new queue is the current harmonic quantity sequentially filled in sequence after the starting point quantity in the current harmonic quantity group), wherein the capacity of the queue is the same as the preset capacity; obtaining the decrement critical quantity of the queue, obtaining the pause bit according to the decrement critical quantity of the queue, summing the number of current harmonic quantity before the pause bit in the queue, equating the number into a bit stream, and forming the decrement harmonic quantity of the current harmonic quantity before the pause bit in the queue by the bit stream and the new quantity corresponding to the pause bit; if the in-queue stall bit is the first current harmonic quantity, the current harmonic quantity before the in-queue stall bit is the first current harmonic quantity; the reduced harmonic quantity of the current harmonic quantity in the whole queue corresponding to the current harmonic quantity group is obtained, and then the obtained reduced harmonic quantity of the current harmonic quantity group is stored.
Thus, according to the position of the pause in the current harmonic quantity group and the preset capacity 2 4 The next queue is obtained, i.e. the next point adjacent to the stop bit is used as the starting point quantity, the starting point quantity is used as the first current harmonic quantity to obtain a new queue, and the capacity of the queue is the preset capacity 2 4 The method comprises the steps of carrying out a first treatment on the surface of the The subsequent queue is continuously constructed by acquiring the pause bit in each queue, thereby acquiring the whole queue corresponding to the current harmonic quantity group.
In addition, the current harmonics are decremented by the decrement threshold in the queue, if the source queue has a first current harmonic, i.e., the first current harmonic in the source queue
And second current harmonic quantity->
Interval of interval->
The first current harmonic quantity is determined>
Is an independent harmonic quantity, directly stores the first current harmonic quantity +.>
To reduce the space for storing the independent harmonic wave quantity and improve the decrement function; if the stall bit in the source queue is not the first current harmonic quantity, the number of total current harmonics before the stall bit through the source queue is defined as +.>
，/>
Is less than the highest capacity 2 of the source queue 4 The new amount corresponding to the stop bit is defined as +.>
Then the reduced harmonic quantity of the current harmonic quantity before the pause bit in the source queue is +. >
，/>
Is the number->
An equivalent bitstream; at this time, when a new queue is acquired according to the stop bit, the source queue is used for the +.>
The harmonic quantity of the current harmonic quantity corresponding to the current harmonic quantity group is taken as the starting point quantity, and the current harmonic quantity is 2 according to the capacity 4 A new queue is obtained on the current harmonic quantity group, wherein the first current harmonic quantity in the queue is the +.>
Current harmonic quantity, if->
The amount of (2) 4 Then->
The current harmonic quantity is the seventeenth current harmonic quantity in the current harmonic quantity group, and the seventeenth current harmonic quantity is used at the moment>
Deducing the critical quantity of decrement in the queue with the current harmonic quantity as the starting point quantity, wherein the critical quantity of decrement in the queue is +>
，/>
Represents a decrement threshold amount, ">
Representing the>
Partial criticality of current harmonic quantity; and according to the decrement critical quantity in the queue at this time, the current harmonic quantity stop bit in the queue is identified, and the decrement is respectively carried out on the independent harmonic quantity and the non-independent harmonic quantity.
In the above manner, the current harmonic amounts in the entire series of the current harmonic amount group are analyzed to obtain the independent harmonic amounts and the dependent harmonic amounts of the entire series, and the independent harmonic amounts and the dependent harmonic amounts are respectively decremented, so that the decremented harmonic amounts of the current harmonic amount group in the collection period are obtained, and the decremented harmonic amounts are stored; by reading the decrement harmonic quantity afterwards, the corresponding current harmonic quantity is analyzed, and the method can be used as usual.
In summary, the present application obtains a set of current harmonics; dividing the current harmonic quantity group into a plurality of subgroups, obtaining attribute bits of each subgroup and radians among the attribute bits, and obtaining the criticality of the subgroup according to the attribute bits and the radians among the attribute bits; dividing the total current harmonic quantity in the corresponding subgroup into a current harmonic quantity high quantity and a current harmonic quantity low quantity according to attribute bits; respectively obtaining the high-amplitude of the high-amplitude current harmonic wave quantity and the low-amplitude of the low-amplitude current harmonic wave quantity; obtaining partial criticality of each current harmonic quantity traveling high according to the traveling high amplitude of the current harmonic quantity and the criticality of the subgroup, and obtaining partial criticality of each current harmonic quantity traveling low according to the traveling low amplitude of the current harmonic quantity and the criticality of the subgroup; a source queue of a current harmonic quantity group is obtained by using a preset capacity, a decrement critical quantity is obtained according to partial criticality of each current harmonic quantity in the source queue, and a stop bit in the source queue is obtained according to the decrement critical quantity; obtaining the whole queues in the current harmonic quantity group according to the preset capacity and the pause bit, obtaining the decrement harmonic quantity of the current harmonic quantity group according to the decrement critical quantity in each queue, and executing storage; the harmonic quantity decrement precision is guaranteed, and the functions of harmonic quantity decrement and storage are improved.
As shown in fig. 2, a prompting device for an electric power system according to the present invention includes:
the system comprises a measuring device, a controller, a wireless communication device and a monitoring computer, wherein the measuring device and the wireless communication device are connected with the controller, and the controller is in communication connection with the monitoring computer in a wireless network through the wireless communication device; the controller can be a PLC or a singlechip; the wireless communication device can be a 4G module and the wireless network can be a 4G network.
The measuring equipment comprises an ammeter I, an ammeter II and a current harmonic measuring instrument, wherein the ammeter I is used for collecting the electricity consumption of a power distribution loop of a power substation and transmitting the collecting time point I of the electricity consumption of the power distribution loop and the electricity consumption of the power distribution loop to the controller; the controller is used for transmitting the power consumption of the power distribution circuit and the collection time point I thereof, the power consumption of the main transformer inlet cabinet line of the power distribution station and the collection time point II thereof, the current harmonic quantity of the main transformer inlet cabinet line and the collection time point III thereof to the monitoring computer through the wireless communication equipment.
In a preferred but non-limiting embodiment of the present invention, the module running on the monitor computer includes a comparison display module for displaying the collected power consumption of the power distribution circuit on the display screen thereof in real time, synchronously performing an operation on the power consumption of the power distribution circuit at each collecting time point one of the day by using a Levenberg-Marquardt algorithm to obtain a regression line one, and performing an operation on the stored power consumption of the power distribution circuit at each collecting time point one of the yesterday by using a Levenberg-Marquardt algorithm to obtain a regression line two, and displaying the regression line one and the regression line two in a rectangular coordinate system one; the power consumption of the collected main transformer incoming cabinet lines is displayed on a display screen in real time, the power consumption of the main transformer incoming cabinet lines in each month of the current year and the power consumption of the main transformer incoming cabinet lines in each month of the last year are obtained according to the power consumption of the collected main transformer incoming cabinet lines, and then the power consumption of the main transformer incoming cabinet lines in each month of the current year and the power consumption of the main transformer incoming cabinet lines in each month of the last year are displayed in a rectangular coordinate system II; and (3) immediately displaying the current harmonic quantity of the collected main transformer incoming line cabinet line on a display screen of the main transformer incoming line cabinet line, synchronously operating the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point III on the day by using a Levenberg-Marquardt algorithm to obtain a regression line III, and displaying the regression line III in a rectangular coordinate system III.
In a preferred but non-limiting embodiment of the present invention, the module running on the monitoring computer further comprises a storage module for obtaining a current harmonic quantity set of the main transformer line cabinet circuit; dividing the current harmonic quantity group into a plurality of subgroups, obtaining radian between attribute bits of each subgroup, and obtaining the criticality of the subgroup according to the radian between the attribute bits; dividing the total current harmonic quantity in the corresponding subgroup into a current harmonic quantity high quantity and a current harmonic quantity low quantity according to attribute bits; respectively obtaining the high-amplitude of the high-amplitude current harmonic wave quantity and the low-amplitude of the low-amplitude current harmonic wave quantity; according to the criticality of the subgroup, the high-level-shift amplitude of the current harmonic quantity and the low-level-shift amplitude of the current harmonic quantity, partial criticality of each current harmonic quantity is respectively obtained; a source queue of a current harmonic quantity group is obtained by using a preset capacity, a decrement critical quantity is obtained according to partial criticality of each current harmonic quantity in the source queue, and a stop bit in the source queue is obtained according to the decrement critical quantity; and obtaining the whole queues in the current harmonic quantity group according to the preset capacity and the pause bit, obtaining the decrement type harmonic quantity of the current harmonic quantity group according to the decrement critical quantity of each queue, and executing storage.
In a preferred but non-limiting embodiment of the present invention, the storage module is further configured to store a set of current harmonics for a collection period, including
The current harmonic quantity is defined as +.>
，/>
Represents->
Collecting period, & lt>
Current harmonic quantity representing first collection time point, < >>
Current harmonic quantity representing second collection time point, < >>
Represents->
Collecting the current harmonic quantity of the time point, namely the number of the current harmonic quantity in the whole current harmonic quantity group; applying a Levenberg-Marquardt algorithm to a current harmonic quantity group to collect time points of a corresponding collecting period of the current harmonic quantity groupThirdly, carrying out operation on the current harmonic quantity of the main transformer incoming line cabinet circuit to obtain a corresponding current harmonic quantity regression line; then, the segmentation is performed on the current harmonic regression line obtained by using the Levenberg-Marquardt algorithm.
In a preferred but non-limiting embodiment of the present invention, the storage module is further configured to use the valley points in the current harmonic quantity regression line as a segmentation limit, and there is a segmented regression line between 2 valley points, where each segmented regression line has a corresponding current harmonic quantity in the current harmonic quantity group, so that each segmented regression line forms a subgroup with a corresponding current harmonic quantity in the current harmonic quantity group, that is, a subgroup corresponds to a regression line, and the subgroup corresponds to a regression line with a single valley top.
Compared with the prior art, the invention has the beneficial effects that the regression line I is obtained, the calculation is also carried out on the power consumption of the power distribution circuit stored at each collecting time I in yesterday by using the Levenberg-Marquardt algorithm to obtain the regression line II, the regression line I and the regression line II are placed in the rectangular coordinate system I for display, so that the power consumption of the power distribution circuit of the power transformation and distribution station can be flexibly displayed on the time point variation by obtaining the regression line I, and the power consumption of the power distribution circuit of the power transformation and distribution station can be displayed in the rectangular coordinate system I for comparison and display on the history period by placing the regression line I and the regression line II; the power consumption of the main transformer inlet cabinet circuit of each month of the current year and the power consumption of the main transformer inlet cabinet circuit of each month of the last year are displayed in a rectangular coordinate system II, so that the power consumption of the main transformer inlet cabinet circuit of the transformer substation can be displayed in a comparison manner in a historical period; and obtaining a regression line III, and placing the regression line III in a rectangular coordinate system III for display, so that the magnitude of the current harmonic of the main transformer inlet cabinet line of the transformer and distribution station can be flexibly displayed on the time point change.
In addition, the current harmonic quantity group is divided into a plurality of subgroups to execute analysis, and the key degree analysis of the current harmonic quantity in the subgroups is carried out through the key degree of each subgroup; obtaining the attribute bit and radian between attribute bits of the subgroup to reflect the variation condition of the current harmonic quantity in the subgroup, wherein the obtained subgroup has high key degree reliability; the current harmonic quantity in the sub-group is divided into a current harmonic quantity running high quantity and a current harmonic quantity running low quantity, analysis treatment is respectively carried out on the current harmonic quantities with different fluctuation actions to obtain a running high amplitude and a running low amplitude, the fluctuation condition of the current harmonic quantity in each sub-group can be carefully reflected, partial criticality of each current harmonic quantity in the sub-group is obtained according to the running high amplitude, the running low amplitude and the criticality of the current harmonic quantity in the sub-group, the acquisition of the partial criticality is more accurate, and the fluctuation attribute of the introduced current harmonic quantity is used for executing the calculation of the partial criticality so as to be more fit with the fluctuation attribute of the actual current harmonic quantity; the method also obtains a plurality of queues in the current harmonic quantity group through the preset capacity, obtains the decrement critical quantity of the queues according to the partial criticality of the current harmonic quantity in the queues, has better decrement critical quantity compatibility through the partial criticality of the current harmonic quantity, and can ensure the decrement effect of the current harmonic quantity; when the queue of the current harmonic quantity group is cut, the step-by-step cutting is performed through the stop bit in the queue, so that the obtained decrement critical quantity of the queue is more accurate, and the decrement function of executing decrement storage on the current harmonic quantity group through the decrement critical quantity which is more accurate and more compatible is more correct.
The present disclosure can be a system, method, and/or computer program product. The computer program product can include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to perform various aspects of the present disclosure.
The computer readable auxiliary medium can be a tangible power grid line capable of holding and auxiliary instructions for execution of the power grid line operations by the instructions. The computer readable accessory medium can be, but is not limited to, an electric accessory grid line, a magnetic accessory grid line, an optical accessory grid line, an electromagnetic accessory grid line, a semiconductor accessory grid line, or any suitable combination of the foregoing. Still further examples (non-enumerated list) of the computer-readable storage medium include: portable computer disk, hard disk, random Access Memory (RAM), read-only memory (RyM), erasable programmable read-only memory (EPRyM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (HD-RyM), digital versatile disk (DXD), memory stick, floppy disk, mechanical coded power grid lines, punch cards or bump structures in grooves like instructions attached thereto, optionally properly merging with the above. Computer-readable storage media as used herein are not to be construed as transient messages themselves, such as radio waves or otherwise freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or otherwise transfer medium (just like optical pulses through a transmission line cable), or electrical messages transferred through wires.
The computer readable program instructions expressed herein can be downloaded from a computer readable storage medium to the respective extrapolated/processed power grid lines, or downloaded to an external computer or external storage power grid line via a wireless network, like the internet, a local area network, a wide area network, and/or a wireless network. Wireless networks can include copper transfer cables, transmission line transfer, wireless transfer, routers, firewalls, switches, WIFI device computers, and/or edge servers. The wireless network adapter card or wireless network port in each of the extrapolated/processed power grid lines receives computer-readable program instructions from the wireless network and forwards the computer-readable program instructions to let the computer-readable storage medium in each of the extrapolated/processed power grid lines.
The computer program instructions for performing the operations of the present disclosure can be assembler instructions, instruction set architecture (lSA) instructions, machine-related instructions, microcode, firmware instructions, condition definition values, or source code or object code written in a random convergence of one or more programming languages, including an object oriented programming language such as Sdallqala, H++ or the like, as opposed to conventional procedural programming languages, such as the "H" language or similar programming languages. The computer readable program instructions can be executed entirely on the client computer, partly on the client computer, as a single software package, partly on the client computer and partly on a remote computer or entirely on the remote computer or server. In a modality involving a remote computer, the remote computer can be connected to the client computer through a wireless network of an arbitrary type, including a local area network (LAb) or a wide area network (UAb), or can be connected to an external computer (as if an internet service provider were employed to connect through the internet). In some embodiments, the various aspects of the present disclosure are achieved by personalizing an electronic circuit, like a programmable logic circuit, a field programmable gate array (disposal platform), or a Programmable Logic Array (PLA), with a status value of a computer readable program instruction.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, and any modifications and equivalents are intended to be encompassed by the scope of the claims.
Claims (10)
1. A method for prompting a power system, comprising:
step 1: the method comprises the steps that an ammeter I of measuring equipment collects power consumption of a power distribution circuit of a power substation and transmits a collection time point I of the power consumption of the power distribution circuit and the power consumption of the power distribution circuit to a controller, an ammeter II of the measuring equipment collects power consumption of a main power inlet cabinet line of the power substation and transmits a collection time point II of the power consumption of the main power inlet cabinet line and the power consumption of the main power inlet cabinet line to the controller, and a current harmonic measuring instrument of the measuring equipment collects current harmonic quantity of the main power inlet cabinet line of the power substation and transmits a collection time point III of the current harmonic quantity of the main power inlet cabinet line and the current harmonic quantity of the main power inlet cabinet line to the controller;
Step 2: the controller transmits the power consumption of the power distribution circuit, the power consumption of the main transformer inlet cabinet line of the power distribution station, the collection time point II of the power consumption, the current harmonic quantity of the main transformer inlet cabinet line and the collection time point III of the power consumption of the power distribution circuit, the collection time point II of the power consumption and the collection time point III of the power consumption to the monitoring computer through the wireless communication equipment;
step 3: and the monitoring computer stores the collected power consumption of the power distribution circuit, the power consumption of the main transformer inlet cabinet line of the power distribution station and the current harmonic quantity of the main transformer inlet cabinet line and performs comparison display.
2. The method for prompting a power system according to claim 1, wherein the method for contrast display specifically comprises:
step 3-1-1: the monitoring computer immediately displays the collected power consumption of the power distribution circuit on a display screen thereof, synchronously uses a Levenberg-Marquardt algorithm to execute operation on the power consumption of the power distribution circuit at each collecting time point I in the day to obtain a regression line I, also uses the Levenberg-Marquardt algorithm to execute operation on the stored power consumption of the power distribution circuit at each collecting time point I in the yesterday to obtain a regression line II, and places the regression line I and the regression line II in a rectangular coordinate system I for display;
step 3-1-2: the monitoring computer displays the power consumption of the collected main transformer incoming cabinet circuit on a display screen of the monitoring computer in real time, and obtains the power consumption of the main transformer incoming cabinet circuit in each month of the current year and the power consumption of the main transformer incoming cabinet circuit in each month of the last year according to the power consumption of the collected main transformer incoming cabinet circuit, and then displays the power consumption of the main transformer incoming cabinet circuit in each month of the current year and the power consumption of the main transformer incoming cabinet circuit in each month of the last year in a rectangular coordinate system II in the form of a histogram;
Step 3-1-3: the monitoring computer displays the current harmonic quantity of the collected main transformer incoming line cabinet line on a display screen of the monitoring computer in real time, synchronously utilizes the Levenberg-Marquardt algorithm to execute operation on the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point three in the day to obtain a regression line three, and places the regression line three in a rectangular coordinate system three for display.
3. The method according to claim 1, wherein the storing of the current harmonic content of the main transformer line-in cabinet line is performed by:
step 3-2-1: obtaining a current harmonic quantity group of a main transformer incoming line cabinet line;
step 3-2-2: dividing the current harmonic quantity group into a plurality of subgroups, obtaining radian between attribute bits of each subgroup, and obtaining the criticality of the subgroup according to the radian between the attribute bits;
step 3-2-3: dividing the total current harmonic quantity in the corresponding subgroup into a current harmonic quantity high quantity and a current harmonic quantity low quantity according to attribute bits; respectively obtaining the high-amplitude of the high-amplitude current harmonic wave quantity and the low-amplitude of the low-amplitude current harmonic wave quantity; according to the criticality of the subgroup, the high-level-shift amplitude of the current harmonic quantity and the low-level-shift amplitude of the current harmonic quantity, partial criticality of each current harmonic quantity is respectively obtained;
Step 3-2-4: a source queue of a current harmonic quantity group is obtained by using a preset capacity, a decrement critical quantity is obtained according to partial criticality of each current harmonic quantity in the source queue, and a stop bit in the source queue is obtained according to the decrement critical quantity; and obtaining the whole queues in the current harmonic quantity group according to the preset capacity and the pause bit, obtaining the decrement type harmonic quantity of the current harmonic quantity group according to the decrement critical quantity of each queue, and executing storage.
4. A method for providing a hint to a power system according to claim 3, wherein the method for dividing the group of current harmonics into a plurality of subgroups specifically comprises:
initially, for a set of current harmonics in a collection period, it includes
The current harmonic quantity is defined as +.>
，/>
Represents->
Collecting period, & lt>
Representing the current harmonic content at the first collection point,
current harmonic quantity representing second collection time point, < >>
Represents->
Collecting the current harmonic quantity of the time point, namely the number of the current harmonic quantity in the whole current harmonic quantity group; carrying out operation on the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point III of the corresponding collecting time period of the current harmonic quantity group by using a Levenberg-Marquardt algorithm to obtain a corresponding current harmonic quantity regression line;
Then, the segmentation is performed on the current harmonic regression line obtained by using the Levenberg-Marquardt algorithm.
5. The method according to claim 4, wherein the method for performing segmentation on the regression line of the harmonic current obtained by using the Levenberg-Marquardt algorithm comprises:
the valley points in the current harmonic quantity regression line are used as segmentation limits, a segmented regression line exists among 2 valley points, each segmented regression line has corresponding current harmonic quantity in the current harmonic quantity group, thus each segmented regression line forms a subgroup in the corresponding current harmonic quantity in the current harmonic quantity group, namely a subgroup corresponding regression line, and the subgroup corresponding regression line is a regression line with a single valley top.
6. A reminder device for an electric power system, comprising:
the system comprises a measuring device, a controller, a wireless communication device and a monitoring computer, wherein the measuring device and the wireless communication device are connected with the controller, and the controller is in communication connection with the monitoring computer in a wireless network through the wireless communication device;
the measuring equipment comprises an ammeter I, an ammeter II and a current harmonic measuring instrument, wherein the ammeter I is used for collecting the electricity consumption of a power distribution loop of a power substation and transmitting the collecting time point I of the electricity consumption of the power distribution loop and the electricity consumption of the power distribution loop to the controller; the controller is used for transmitting the power consumption of the power distribution circuit and the collection time point I thereof, the power consumption of the main transformer inlet cabinet line of the power distribution station and the collection time point II thereof, the current harmonic quantity of the main transformer inlet cabinet line and the collection time point III thereof to the monitoring computer through the wireless communication equipment.
7. The prompting device for a power system according to claim 6 wherein the module running on the monitoring computer comprises a comparison display module for displaying the collected power consumption of the power distribution circuit on a display screen thereof in real time, synchronously operating the power consumption of the power distribution circuit at each collecting time point one of the day by using a Levenberg-Marquardt algorithm to obtain a regression line one, operating the power consumption of the power distribution circuit at each collecting time point one of the yesterday by using the Levenberg-Marquardt algorithm to obtain a regression line two, and displaying the regression line one and the regression line two in a rectangular coordinate system one; the power consumption of the collected main transformer incoming cabinet lines is displayed on a display screen in real time, the power consumption of the main transformer incoming cabinet lines in each month of the current year and the power consumption of the main transformer incoming cabinet lines in each month of the last year are obtained according to the power consumption of the collected main transformer incoming cabinet lines, and then the power consumption of the main transformer incoming cabinet lines in each month of the current year and the power consumption of the main transformer incoming cabinet lines in each month of the last year are displayed in a rectangular coordinate system II; and (3) immediately displaying the current harmonic quantity of the collected main transformer incoming line cabinet line on a display screen of the main transformer incoming line cabinet line, synchronously operating the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point III on the day by using a Levenberg-Marquardt algorithm to obtain a regression line III, and displaying the regression line III in a rectangular coordinate system III.
8. The power system reminder device of claim 6, wherein the modules running on the monitoring computer further comprise a storage module for taking a set of current harmonics of the main transformer cabinet line; dividing the current harmonic quantity group into a plurality of subgroups, obtaining radian between attribute bits of each subgroup, and obtaining the criticality of the subgroup according to the radian between the attribute bits; dividing the total current harmonic quantity in the corresponding subgroup into a current harmonic quantity high quantity and a current harmonic quantity low quantity according to attribute bits; respectively obtaining the high-amplitude of the high-amplitude current harmonic wave quantity and the low-amplitude of the low-amplitude current harmonic wave quantity; according to the criticality of the subgroup, the high-level-shift amplitude of the current harmonic quantity and the low-level-shift amplitude of the current harmonic quantity, partial criticality of each current harmonic quantity is respectively obtained; a source queue of a current harmonic quantity group is obtained by using a preset capacity, a decrement critical quantity is obtained according to partial criticality of each current harmonic quantity in the source queue, and a stop bit in the source queue is obtained according to the decrement critical quantity; and obtaining the whole queues in the current harmonic quantity group according to the preset capacity and the pause bit, obtaining the decrement type harmonic quantity of the current harmonic quantity group according to the decrement critical quantity of each queue, and executing storage.
9. The power system of claim 8, wherein the storage module is further configured to store, for a collection period, a set of current harmonics comprising
The current harmonic quantity is defined as +.>
，
Represents->
Collecting period, & lt>
Current harmonic quantity representing first collection time point, < >>
Current harmonic quantity representing second collection time point, < >>
Represents->
Collecting the current harmonic quantity of the time point, namely the number of the current harmonic quantity in the whole current harmonic quantity group; carrying out operation on the current harmonic quantity of the main transformer incoming line cabinet line at each collecting time point III of the corresponding collecting time period of the current harmonic quantity group by using a Levenberg-Marquardt algorithm to obtain a corresponding current harmonic quantity regression line; then, the segmentation is performed on the current harmonic regression line obtained by using the Levenberg-Marquardt algorithm.
10. The apparatus of claim 9, wherein the storage module is further configured to use a valley point in the regression line of the current harmonic as a slicing boundary, and there is a sliced regression line between 2 valley points, each sliced regression line having a corresponding current harmonic in the current harmonic set, such that each sliced regression line forms a subset of the corresponding current harmonic in the current harmonic set, i.e., a subset of the corresponding regression lines, and the subset of the corresponding regression lines is a regression line having a single valley top.
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