CN107478926B - Power utilization monitoring device and method - Google Patents
Power utilization monitoring device and method Download PDFInfo
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- CN107478926B CN107478926B CN201710573864.6A CN201710573864A CN107478926B CN 107478926 B CN107478926 B CN 107478926B CN 201710573864 A CN201710573864 A CN 201710573864A CN 107478926 B CN107478926 B CN 107478926B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q50/06—Electricity, gas or water supply
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
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Abstract
The invention discloses a power consumption monitoring device, comprising: the electric energy detection part is connected to the electric bus and used for detecting the current on the electric bus, acquiring the time domain waveform of the current, classifying the current characteristics and corresponding the current characteristics to the state of the electric appliance; the electrical appliance management system is connected with each electrical appliance and can receive the electrical appliance state information sent by each electrical appliance in real time; the electrical appliance management system is connected with the electric energy detection part; the electric appliance state information at least comprises current electric appliance power information. The invention has the beneficial effects that: (1) the using state of the electric appliance can be determined according to the current characteristics on the electric bus; (2) the fixed power consumption can be determined by combining different using states of the electrical appliance.
Description
Technical Field
The invention relates to the field of electric energy monitoring, in particular to an electricity utilization monitoring device and method.
Background
With the spread of various household appliances, real-time monitoring of the respective household appliances becomes a problem that must be considered. Conventional home devices typically have a rated operating power, and when the actual power used by the home device is greater than the rated power, the home device itself detects an abnormal change in the power and issues an alarm. In the prior art, a means is also adopted, in which an electric energy meter counts the current actual power consumption in real time, defines a power threshold, and sends an alarm to a user when the actual power consumption exceeds the power threshold, so as to reduce the danger caused by abnormal power consumption of the household appliance. However, this method needs to set the power threshold in advance, and the setting of the power threshold is often set by the user according to the actual life experience, and is not scientific. The prior art can only realize the limitation of the power consumption of the electrical appliance, but cannot play a role in monitoring the power consumption of the electrical appliance.
Disclosure of Invention
The invention aims to provide an electricity utilization monitoring device and method, which can be used for more accurately monitoring the use state of an electric appliance.
Specifically, the invention is realized by the following technical scheme:
an electricity usage monitoring device, the device comprising:
the electric energy detection part is connected to the electric bus and used for detecting the current on the electric bus, acquiring the time domain waveform of the current, classifying the current characteristics and corresponding the current characteristics to the state of the electric appliance;
the electrical appliance management system is connected with each electrical appliance and can receive the electrical appliance state information sent by each electrical appliance in real time; the electrical appliance management system is connected with the electric energy detection part; the electric appliance state information at least comprises current electric appliance power information;
the electric energy detection part comprises a tabulation storage unit, a characteristic quantity storage unit and a comparison unit, wherein the tabulation storage unit is used for producing a corresponding relation table of the electric appliance state information at a plurality of preset verification moments and the corresponding characteristic quantity at a plurality of preset verification moments and storing the corresponding relation table; the tabulation storage unit stores the corresponding relation between the state combination of each electrical appliance and the current characteristic quantity in a mode of making a comparison table;
the electric energy detection part comprises a comparison unit, a comparison unit and a comparison unit, wherein the comparison unit is used for comparing the characteristic quantity obtained at the next preset verification time with the standard characteristic quantity data in the corresponding relation table respectively, determining the current state of each electric appliance and comparing the electricity utilization rule; the comparison unit is specifically used for obtaining the characteristic quantity at each preset verification moment, comparing the characteristic quantity detected at each moment with the characteristic quantity stored in the tabulation storage unit at the corresponding moment, determining the deviation of the power utilization rule, and alarming when the deviation is overlarge;
the electric energy detection part comprises an electricity utilization abnormity judgment module, the difference value between the theoretical total power and the current measured total power of the electric appliance is calculated according to the determined state of the electric appliance, and if the difference value is greater than a preset threshold value, the electric energy detection part initially judges that electric leakage exists; and reporting the initial leakage information to a maintenance company, feeding back error-free information by the maintenance company after the maintenance is carried out, regarding the difference value as fixed power consumption if the difference value of the same total power is repeated in the current state of the electric appliance, and counting the electric energy wasted by the fixed power consumption in the future statistics.
Preferably, the power detection unit includes:
the total power consumption measuring module is used for measuring the current total power consumption;
the current time domain data storage unit is used for storing the detected current time domain signals in a digitized form;
the analysis unit is used for carrying out frequency domain conversion on the current time domain signals in the current time domain data storage unit at a plurality of preset verification moments to obtain a plurality of corresponding frequency domain data;
a feature quantity extracting unit, configured to extract a feature quantity for the plurality of frequency domain data;
and the electrical appliance state parameter receiving unit is used for receiving the state information of each electrical appliance, which is sent by the electrical appliance management system at the corresponding preset verification time.
Preferably, the analysis unit is specifically configured to, at a preset verification time, obtain time domain waveforms of a preset length of time before and after the preset verification time, perform frequency domain conversion, and obtain frequency domain data as frequency domain data corresponding to the current preset verification time.
Preferably, the power consumption abnormality judgment module determines theoretical power of each electrical appliance according to the determined state of the electrical appliance, calculates theoretical total power according to the theoretical power, receives total power consumption measured by the total power consumption measurement module, calculates a difference value between the total power consumption and the theoretical total power, and sends an electric leakage alarm to the maintenance company if the difference value is greater than a preset threshold value.
Preferably, the power consumption abnormality judgment module can also receive error-free information sent by a maintenance company, and if the error-free information is received for multiple times under the condition of the same electrical appliance and the difference values are the same, the difference value is used as the fixed power consumption under the current electrical appliance condition, and different fixed power consumption is determined according to the electrical appliance condition at different moments.
A method of monitoring electricity usage, the method comprising:
a tabulation phase and a monitoring phase, the tabulation phase including:
step 1: the electric energy detection part acquires a current time domain waveform on the power bus and stores the time domain waveform in a current time domain data storage unit;
step 2: the analysis unit performs frequency domain conversion on the current time domain signals in the current time domain data storage unit at a plurality of preset verification moments to obtain a plurality of corresponding frequency domain data;
and step 3: a characteristic quantity extraction unit extracts characteristic quantities of the plurality of frequency domain data;
and 4, step 4: the electrical appliance state parameter receiving unit receives the state information of each electrical appliance sent by the electrical appliance management system at the corresponding preset verification time;
and 5: the table making and storing unit makes corresponding relations between the electric appliance state information at a plurality of preset verification moments and the corresponding characteristic quantities at a plurality of preset verification moments into corresponding relation tables for storage;
the monitoring phase comprises:
step 6: the electric energy detection part acquires a current time domain signal at a preset verification moment;
and 7: the analysis unit carries out frequency domain conversion on the current time domain signal at the preset verification moment to obtain frequency domain data;
and 8: a characteristic quantity extraction unit extracts the characteristic quantity of the frequency domain data;
and step 9: the comparison unit compares the characteristic quantity with standard characteristic quantity data in a corresponding relation table in the tabulation storage unit to determine the current states of all the electric appliances and compare the power utilization rules; the comparison unit obtains the characteristic quantity at each preset verification moment, compares the characteristic quantity detected at each moment with the characteristic quantity stored in the tabulation storage unit at the corresponding moment, determines the deviation of the electricity utilization rule, and gives an alarm when the deviation is overlarge;
step 10: the power utilization abnormity judgment module calculates the difference value between the theoretical total power and the current measured total power of the electric appliance according to the determined state of the electric appliance, and if the difference value is greater than a preset threshold value, the electric leakage is judged initially; reporting the initial leakage judgment information to a maintenance company;
step 11: after the overhaul company does not have errors, feeding back error-free information to the power utilization abnormality judgment module;
step 12: the power utilization abnormity judging module judges whether the times of the difference of the same total power in the current state of the electric appliance exceed a time threshold value, and if so, the difference value is used as the fixed consumed power.
Preferably, the step 7 specifically includes:
the analysis unit acquires time domain waveforms of preset length of time before and after a preset verification time, performs frequency domain conversion on the acquired time domain waveforms, and uses the acquired frequency domain data as frequency domain data corresponding to the current preset verification time.
Preferably, the step 10 specifically includes:
under the condition of electric leakage, the electricity utilization abnormity judgment module sends the corresponding electric appliance state to the maintenance company, and the maintenance company sets the corresponding electric appliance to be in the corresponding electric appliance state during maintenance to perform actual detection.
The invention has the beneficial effects that: (1) the using state of the electric appliance can be determined according to the current characteristics on the electric bus; (2) the fixed power consumption can be determined by combining different using states of the electrical appliance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an electricity consumption monitoring device according to the present invention;
FIG. 2 is a schematic diagram of an electric energy detecting portion of an electric monitoring device according to the present invention;
FIG. 3 is a schematic diagram of converting current time domain data into frequency domain data according to the present invention;
FIG. 4 is a schematic diagram of comparison of current time domain data-frequency domain data-features provided by the present invention;
fig. 5 is a schematic view of a power consumption monitoring process according to the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The present invention will be described in detail below by way of examples.
An electricity consumption monitoring apparatus, as shown in fig. 1, the apparatus comprising:
and the electric energy detection part is connected to the electric bus and used for detecting the current on the electric bus, acquiring the time domain waveform of the current, classifying the current characteristics and corresponding the current characteristics to the state of the electric appliance.
The electrical appliance management system is connected with each electrical appliance and can receive the electrical appliance state information sent by each electrical appliance in real time; the electrical appliance management system is connected with the electric energy detection part; the electric appliance state information at least comprises current electric appliance power information;
the electric energy detection part comprises an electric energy detection part and an electric power utilization abnormity judgment module, the difference value between the theoretical total power and the current measured total power of the electric appliance is calculated according to the determined state of the electric appliance, and if the difference value is greater than a preset threshold value, the electric energy detection part initially judges that electric leakage exists; and reporting the initial leakage information to a maintenance company, feeding back error-free information by the maintenance company after the maintenance is carried out, regarding the difference value as fixed power consumption if the difference value of the same total power is repeated in the current state of the electric appliance, and counting the electric energy wasted by the fixed power consumption in the future statistics.
Specifically, in order to consider the use cost, the electrical appliance management system can be used by a single household in a renting mode, when the electrical appliance management system is rented by the household, the electrical appliance management system can be connected with each electrical appliance, and the electrical appliance management system can acquire the current state of the electrical appliance related to the use power from the electrical appliance in real time, for example, the electrical appliance is three variable frequency air conditioners, namely an air conditioner a, an air conditioner B and an air conditioner C, and the parameter related to the air conditioner power has the current rated power of each air conditioner. Therefore, when the user uses the air conditioner for a period of time (such as one month), the relationship between the rated power combination and the power consumption current of the three inverter air conditioners can be obtained. Further, frequency domain analysis is carried out on the total power utilization current, frequency domain characteristics are obtained, and the rated power combination of the variable frequency air conditioner corresponds to the total current frequency domain characteristics one to one.
Further, as shown in fig. 2, the power detection unit includes:
and the total power consumption measuring module is used for measuring the current total power consumption. Specifically, the total power consumption measuring module may perform an integral operation on the detected current over a certain time length, and then average the detected current over the time length to obtain the total power consumption over the time length. The time length is taken as short as possible to make the instantaneous power calculation more accurate.
And the current time domain data storage unit is used for storing the detected current time domain signals in a digitized form.
The electric energy detection part digitally quantizes the total current flowing through the A/D converter, corresponds the current value at the current moment to the current value at the current moment one by one and stores the current value in the current time domain data storage unit, namely stores the current time domain waveform in the current time domain data storage unit.
And the analysis unit is used for carrying out frequency domain conversion on the current time domain signals in the current time domain data storage unit at a plurality of preset verification moments to obtain a plurality of corresponding frequency domain data. Furthermore, the obtained current time domain data can be filtered through a low-frequency filter, only a high-frequency component capable of reflecting the state change of the electric appliance is obtained, and then frequency domain conversion is carried out on the high-frequency component.
Specifically, the analysis unit acquires time domain waveforms of preset length of time before and after the preset verification time at the preset verification time, performs frequency domain conversion, and uses the acquired frequency domain data as frequency domain data corresponding to the current preset verification time. As shown in fig. 3, the current time domain data from time 0 to time t has been stored in the current time domain data storage unit, and the preset verification times t1, t2 and t3 are included in the time 0 to time t, so that at each preset verification time, the current time domain data within the time length of 2 Δ t is subjected to frequency domain analysis by taking the time as the center and advancing the time length of Δ t forwards and backwards, and a corresponding frequency spectrum is obtained.
And the characteristic quantity extraction unit is used for extracting the characteristic quantity of the plurality of frequency domain data. As shown in fig. 4, the current time domain waveform, the current frequency domain pattern, and the feature amount can be associated with each other by the operations of the analyzing means and the feature amount extracting means.
The extracted feature vector can be used as the feature quantity of the corresponding frequency spectrum by adopting the existing method for extracting the feature vector of the frequency domain data.
And the electrical appliance state parameter receiving unit is used for receiving the state information of each electrical appliance, which is sent by the electrical appliance management system at the corresponding preset verification time. The state information of the electric appliance at least comprises power information of the electric appliance at a corresponding preset verification moment.
And the tabulation storage unit is used for making the corresponding relation between the electric appliance state information at the plurality of preset verification moments and the corresponding characteristic quantities at the plurality of preset verification moments into a corresponding relation table and storing the corresponding relation table.
The tabulation storage unit stores the corresponding relation between the state combination of each electrical appliance and the current characteristic quantity in a mode of making a comparison table, so that the current electrical appliance which is used can be determined in a table look-up mode and what the use state of each electrical appliance is as long as the characteristic quantity of the current is known. The electricity utilization habits of the users are usually counted by taking the day as a unit, and as mentioned above, the electrical appliance management system can be used by a single household in a renting mode, so that the statistics of 'time-current characteristics-electrical appliance use states' is carried out once every day when the electrical appliance management system is used by the household of the user, so that the electricity utilization laws of the household of the user are obtained, and the electricity utilization laws are also stored in the tabulation storage unit so as to compare the electricity utilization laws every day.
And the comparison unit is used for comparing the obtained characteristic quantities at the next preset verification moment with the standard characteristic quantity data in the corresponding relation table respectively, determining the current states of the electric appliances and comparing the power utilization rules.
| Time of day | Current characteristics | Using state of electrical appliance |
| 13:00 | Feature 1 | The power of the air conditioner C is 25, the power of the air conditioner B is 20, and the power of the air conditioner A is 15 |
| 14:00 | Feature 2 | The power of the air conditioner C is 20, the power of the air conditioner B is 16, and the power of the air conditioner A is 24 |
| 15:00 | Feature 3 | The power of the air conditioner C is 18, the power of the air conditioner B is 26, and the power of the air conditioner A is 20 |
TABLE 1
Table 1 merely shows an example of a "time-current characteristic-consumer usage status" table, in which the status of each consumer is different at different times and the corresponding current characteristic is different. In actual use, the time value, the characteristic number and the usage state of the electrical appliance are much more than those shown in table 1. However, also taking table 1 as an example, once the comparison unit determines that the characteristic of the total current at a certain preset verification time is 1, the use conditions of the current electrical appliances are "the power of the air conditioner C is 25, the power of the air conditioner B is 20, and the power of the air conditioner a is 15" through table 1, and the current total power can be calculated according to the power of each air conditioner.
Further, the comparison unit is specifically configured to obtain the feature quantity at each preset verification time, compare the feature quantity detected at each time with the feature quantity stored in the tabulation storage unit at the corresponding time, determine a deviation of the power consumption law, and alarm when the deviation is too large.
On the day when the electrical appliance management system is not used, the comparison unit can detect the characteristic quantity of the total current at different preset verification moments every day, and the service state of each electrical appliance is determined by a method of looking up a comparison table according to the characteristic quantity of the total current. Also taking table 1 as an example, table 1 records the usage of the electrical appliance in a normal situation, and it is assumed that 14: 00, the calculated current characteristic is characteristic 4, and the using states of the electrical appliances corresponding to the characteristic 4 are that "the power of the air conditioner C is 30, the power of the air conditioner B is 26, and the power of the air conditioner a is 34", and the power of each electrical appliance in such an electrical appliance using state is far higher than that in a normal condition 14: when the power of each electrical appliance in the electrical appliance use state at 00 hours, the day 14: when the household appliances of the user are abnormal in use at 00 hours, an abnormal alarm is sent to the user.
The power utilization abnormity judgment module calculates the difference value between the theoretical total power of the electric appliance and the current measured total power according to the determined state of the electric appliance, and if the difference value is greater than a preset threshold value, the electric leakage is judged initially; and reporting the initial leakage information to a maintenance company, feeding back error-free information by the maintenance company after the maintenance is carried out, regarding the difference value as fixed power consumption if the difference value of the same total power is repeated in the current state of the electric appliance, and counting the electric energy wasted by the fixed power consumption in the future statistics.
Further, the power utilization abnormity judgment module determines theoretical power of each electric appliance according to the determined state of the electric appliance, calculates theoretical total power according to the theoretical power, receives total power utilization measured by the total power utilization measurement module, calculates a difference value of the total power utilization minus the theoretical total power, and sends an electric leakage alarm to a maintenance company if the difference value is greater than a preset threshold value.
Similarly, taking table 1 as an example, when the total current characteristic is obtained at a certain preset verification time as characteristic 2, and the corresponding electrical appliance states in table 1 are "air conditioner C power is 20, air conditioner B power is 16, and air conditioner a power is 24", theoretically the total power is 20+16+24 is 60, but the currently measured total power is 80, which indicates that in the 80 powers, in addition to 60 for electrical appliance operation, the electrical power of 20 is consumed without any reason, and it is highly likely that a part of the electrical power is lost due to electric leakage. When the electric leakage phenomenon is generated through pre-judgment, the electricity utilization monitoring device reports the phenomenon to a maintenance company, and the reported content comprises the theoretical total electricity utilization power and the actually measured total electricity utilization power when the pre-judgment electric leakage occurs at present and the state of an electric appliance corresponding to the current characteristic. The overhaul company further confirms whether the electric leakage of the electric appliance occurs in the user home or whether a lawbreaker steals the electric appliance in the user home by dispatching overhaul personnel to overhaul and the like.
Further, the power consumption abnormality judgment module can also receive error-free information sent by a maintenance company, and if the error-free information is received for multiple times under the condition of the same electrical appliance and the difference values are the same, the difference value is used as the fixed power consumption under the current electrical appliance condition, and different fixed power consumption is determined according to the electrical appliance condition at different moments.
In practical use of an electrical appliance, the current rated power of the electrical appliance given by an electrical appliance manufacturer is only the power theoretically achieved by the electrical appliance when the electrical appliance is used singly, but a household electrical appliance network is complex and variable, and a plurality of different electrical appliances are used in a mixed manner and usually have mutual influences which are unexpected or difficult to explain and analyze theoretically, so that additional consumption of electric energy is generated. In the invention, the reason and the action mechanism of the mutual influence are not explored, but only from the aspect of practical use, how much extra power loss occurs in the current specific using state of the electric appliance is determined more practically, and the power loss under the specific condition is recorded. When the maintenance company receives the pre-judgment leakage alarm under the same condition for multiple times, but no actual damage of the electric appliance is found after the maintenance is finished, for example, the alarm content is' theoretical total power is 60, actual total power is 80, and the state of the electric appliance is as follows: the power of the air conditioner C is 20, the power of the air conditioner B is 16, and the power of the air conditioner a is 24 ", but the maintainer does not find that the air conditioner is damaged or abnormal through the inspection of the air conditioner, which indicates that the generated power difference value of 20 is not caused by electric leakage or electricity stealing by people, but three air conditioners generate extra power loss under the premise of common use (but does not know why the generated power difference value is generated, and only clearly shows that the generated power loss is a natural phenomenon which inevitably occurs under the current state of the electric appliance), and the extra power of 20 is recorded as the fixed consumed power under the specific condition of 'the power of the air conditioner C is 20, the power of the air conditioner B is 16, and the power of the air conditioner a is 24'. The above "theoretical total power is 60 and measured total power is 80" is only an example to show the difference between the theoretical total power and the measured total power, but the difference between the theoretical total power and the measured total power may be any value in practice.
The present invention also provides a power consumption monitoring method, as shown in fig. 5, the method including:
a tabulation phase and a monitoring phase, the tabulation phase including:
s101: the electric energy detection part acquires a current time domain waveform on the power bus and stores the time domain waveform in the current time domain data storage unit.
S102: the analysis unit performs frequency domain conversion on the current time domain signals in the current time domain data storage unit at a plurality of preset verification moments to acquire a plurality of corresponding frequency domain data.
S103: the feature quantity extraction unit extracts feature quantities of the plurality of frequency domain data.
S104: and the electrical appliance state parameter receiving unit receives the state information of each electrical appliance, which is sent by the electrical appliance management system at the corresponding preset verification time.
S105: and the tabulation storage unit is used for producing a corresponding relation table of the electric appliance state information at a plurality of preset verification moments and the corresponding characteristic quantities at a plurality of preset verification moments and storing the corresponding relation table.
The monitoring phase comprises:
s106: the electric energy detection part acquires a current time domain signal at a preset verification time.
S107: the analysis unit carries out frequency domain conversion on the current time domain signal at the preset verification time to obtain frequency domain data.
S108: a feature quantity extraction unit extracts a feature quantity from the frequency domain data.
S109: and the comparison unit compares the characteristic quantity with the standard characteristic quantity data in the corresponding relation table in the tabulation storage unit, determines the current state of each electric appliance and compares the power utilization rule.
S110: the power utilization abnormity judgment module calculates the difference value between the theoretical total power and the current measured total power of the electric appliance according to the determined state of the electric appliance, and if the difference value is greater than a preset threshold value, the electric leakage is judged initially; and reporting the initial leakage judgment information to a maintenance company.
S111: and after the overhaul company is correct, the correct information is fed back to the power utilization abnormality judgment module.
S112: the power utilization abnormity judging module judges whether the times of the difference of the same total power in the current state of the electric appliance exceed a time threshold value, and if so, the difference value is used as the fixed consumed power.
Further, the S107 specifically includes:
the analysis unit acquires time domain waveforms of preset length of time before and after a preset verification time, performs frequency domain conversion on the acquired time domain waveforms, and uses the acquired frequency domain data as frequency domain data corresponding to the current preset verification time.
Further, the S109 includes: the comparison unit obtains the characteristic quantity at each preset verification time, compares the characteristic quantity detected at each time with the characteristic quantity stored in the tabulation storage unit at the corresponding time, determines the deviation of the power utilization rule, and gives an alarm when the deviation is overlarge.
Further, the feature quantity may be a feature vector obtained according to a frequency spectrum, a deviation of the electricity usage law may be determined by calculating a difference between a modulus of the feature vector obtained at a preset verification time and a modulus of the feature vector stored in the tabulation storage unit, and when the difference between the moduli is greater than a preset modulus difference threshold, it is determined that the deviation is too large, and an alarm is given to a user.
Further, the S110 specifically includes:
under the condition of electric leakage, the electricity utilization abnormity judgment module sends the corresponding electric appliance state to the maintenance company, and the maintenance company sets the corresponding electric appliance to be in the corresponding electric appliance state during maintenance to perform actual detection.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An electricity consumption monitoring apparatus, comprising:
the electric energy detection part is connected to the electric bus and used for detecting the current on the electric bus, acquiring the time domain waveform of the current, classifying the current characteristics and corresponding the current characteristics to the state of the electric appliance;
the electrical appliance management system is connected with each electrical appliance and can receive the electrical appliance state information sent by each electrical appliance in real time; the electrical appliance management system is connected with the electric energy detection part; the electric appliance state information at least comprises current electric appliance power information;
the electric energy detection part comprises a tabulation storage unit, a characteristic quantity storage unit and a comparison unit, wherein the tabulation storage unit is used for producing a corresponding relation table of the electric appliance state information at a plurality of preset verification moments and the corresponding characteristic quantity at a plurality of preset verification moments and storing the corresponding relation table; the tabulation storage unit stores the corresponding relation between the state combination of each electrical appliance and the current characteristic quantity in a mode of making a comparison table;
the electric energy detection part comprises a comparison unit, a comparison unit and a comparison unit, wherein the comparison unit is used for comparing the characteristic quantity obtained at the next preset verification time with the standard characteristic quantity data in the corresponding relation table respectively, determining the current state of each electric appliance and comparing the electricity utilization rule; the comparison unit is specifically used for obtaining the characteristic quantity at each preset verification moment, comparing the characteristic quantity detected at each moment with the characteristic quantity stored in the tabulation storage unit at the corresponding moment, determining the deviation of the power utilization rule, and alarming when the deviation is overlarge;
the electric energy detection part comprises an electricity utilization abnormity judgment module, the difference value between the theoretical total power and the current measured total power of the electric appliance is calculated according to the determined state of the electric appliance, and if the difference value is greater than a preset threshold value, the electric energy detection part initially judges that electric leakage exists; and reporting the initial leakage information to a maintenance company, feeding back error-free information by the maintenance company after the maintenance is carried out, regarding the difference value as fixed power consumption if the difference value of the same total power is repeated in the current state of the electric appliance, and counting the electric energy wasted by the fixed power consumption in the future statistics.
2. The electricity consumption monitoring device according to claim 1, wherein the electric energy detection portion includes:
the total power consumption measuring module is used for measuring the current total power consumption;
the current time domain data storage unit is used for storing the detected current time domain signals in a digitized form;
the analysis unit is used for carrying out frequency domain conversion on the current time domain signals in the current time domain data storage unit at a plurality of preset verification moments to obtain a plurality of corresponding frequency domain data;
a feature quantity extracting unit, configured to extract a feature quantity for the plurality of frequency domain data;
and the electrical appliance state parameter receiving unit is used for receiving the state information of each electrical appliance, which is sent by the electrical appliance management system at the corresponding preset verification time.
3. The electricity consumption monitoring device according to claim 2, wherein the analysis unit is specifically configured to, at a preset verification time, obtain time domain waveforms a preset length of time before and after the preset verification time, perform frequency domain conversion, and obtain frequency domain data as frequency domain data corresponding to the current preset verification time.
4. The electricity consumption monitoring device according to claim 1, wherein the electricity consumption abnormality determining module determines theoretical power of each electrical appliance according to the determined state of the electrical appliance, calculates theoretical total power according to the theoretical power, receives the total electricity consumption measured by the total electricity consumption power measuring module, calculates a difference value between the total electricity consumption power and the theoretical total power, and sends an electric leakage alarm to a maintenance company if the difference value is greater than a preset threshold value.
5. The electricity consumption monitoring device according to claim 4, wherein the electricity consumption abnormality determining module is further capable of receiving error-free information sent by a maintenance company, and if the error-free information is received for a plurality of times in the state of the same electrical appliance and the difference is the same, the difference is used as the fixed consumed power in the current electrical appliance state, and different fixed consumed powers are determined according to the states of the electrical appliances at different times.
6. A method of monitoring power usage, the method comprising:
a tabulation phase and a monitoring phase, the tabulation phase including:
step 1: the electric energy detection part acquires a current time domain waveform on the power bus and stores the time domain waveform in a current time domain data storage unit;
step 2: the analysis unit performs frequency domain conversion on the current time domain signals in the current time domain data storage unit at a plurality of preset verification moments to obtain a plurality of corresponding frequency domain data;
and step 3: a characteristic quantity extraction unit extracts characteristic quantities of the plurality of frequency domain data;
and 4, step 4: the electrical appliance state parameter receiving unit receives the state information of each electrical appliance sent by the electrical appliance management system at the corresponding preset verification time;
and 5: the table making and storing unit makes corresponding relations between the electric appliance state information at a plurality of preset verification moments and the corresponding characteristic quantities at a plurality of preset verification moments into corresponding relation tables for storage;
the monitoring phase comprises:
step 6: the electric energy detection part acquires a current time domain signal at a preset verification moment;
and 7: the analysis unit carries out frequency domain conversion on the current time domain signal at the preset verification moment to obtain frequency domain data;
and 8: a characteristic quantity extraction unit extracts the characteristic quantity of the frequency domain data;
and step 9: the comparison unit compares the characteristic quantity with standard characteristic quantity data in a corresponding relation table in the tabulation storage unit to determine the current states of all the electric appliances and compare the power utilization rules; the comparison unit obtains the characteristic quantity at each preset verification moment, compares the characteristic quantity detected at each moment with the characteristic quantity stored in the tabulation storage unit at the corresponding moment, determines the deviation of the electricity utilization rule, and gives an alarm when the deviation is overlarge;
step 10: the power utilization abnormity judgment module calculates the difference value between the theoretical total power and the current measured total power of the electric appliance according to the determined state of the electric appliance, and if the difference value is greater than a preset threshold value, the electric leakage is judged initially; reporting the initial leakage judgment information to a maintenance company;
step 11: after the overhaul company does not have errors, feeding back error-free information to the power utilization abnormality judgment module;
step 12: the power utilization abnormity judging module judges whether the times of the difference of the same total power in the current state of the electric appliance exceed a time threshold value, and if so, the difference value is used as the fixed consumed power.
7. The electricity consumption monitoring method according to claim 6, wherein the step 7 specifically includes:
the analysis unit acquires time domain waveforms of preset length of time before and after a preset verification time, performs frequency domain conversion on the acquired time domain waveforms, and uses the acquired frequency domain data as frequency domain data corresponding to the current preset verification time.
8. The electricity consumption monitoring method according to claim 6, wherein the step 10 specifically includes:
under the condition of electric leakage, the electricity utilization abnormity judgment module sends the corresponding electric appliance state to the maintenance company, and the maintenance company sets the corresponding electric appliance to be in the corresponding electric appliance state during maintenance to perform actual detection.
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| CN109443395B (en) * | 2018-09-18 | 2022-03-04 | 中国电力科学研究院有限公司 | Method and system for judging whether energy consumption intensity multipoint measurement difference value exceeds limit value |
| CN109270849B (en) * | 2018-11-01 | 2020-05-26 | 杭州鸿雁电器有限公司 | Safety early warning method under cooperative control of building electrical appliances |
| CN109670526A (en) * | 2018-11-09 | 2019-04-23 | 全球能源互联网研究院有限公司 | A kind of interference source type discrimination method, device, equipment and the storage medium of power grid |
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