CN111708925A - Intelligent household appliance load identification system and method for residential user - Google Patents
Intelligent household appliance load identification system and method for residential user Download PDFInfo
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Abstract
The invention provides an intelligent household appliance load identification system for a resident user, which comprises a load identification device, a power grid monitoring platform, a user side and a flexible load socket, wherein the load identification device is arranged between an electric appliance and a general electric meter and is used for identifying the load of the electric appliance, acquiring the load curve of the electric appliance, converting the load curve into a digital signal and transmitting the digital signal to the power grid monitoring platform; the power grid monitoring platform is used for comparing the digital signal with the proportioning database to generate an analysis result and transmitting the analysis result to a user side; the system comprises a database, a user side binding instruction and a matching database, wherein the database is used for receiving the user side binding instruction, processing the binding instruction and generating the matching database; the user side receives an analysis result; the user side is also used for sending a binding instruction to the power grid monitoring platform. The load identification is installed at the input end of the main ammeter in a non-invasive way without changing the indoor circuit and the circuit of the electric appliance, so that the use of a large number of sensors is reduced, and the safety and the high efficiency are realized.
Description
Technical Field
The invention relates to the technical field of load identification, in particular to an intelligent household appliance load identification system and method for residential users.
Background
Due to the improvement of living standard, more and more electric appliances are used in common families, for example, an air conditioner is arranged in each room, a water heater is arranged in a toilet and a kitchen, a rice cooker, a microwave oven, an electric kettle and the like are arranged in the kitchen, so that the electric appliances use electric power resources, the electric energy used by each electric appliance is different, and a user cannot know the power consumption and the power consumption condition of each electric appliance. The intelligent household electricity safety monitoring system comprises an intelligent household electricity monitoring module, an intelligent household electricity monitoring platform and an intelligent terminal, wherein the intelligent household electricity monitoring module acquires intelligent household electricity information based on a wireless sensor network and sends the acquired intelligent household electricity information to the intelligent household electricity monitoring platform, and the intelligent household electricity monitoring platform is used for receiving, storing and displaying the intelligent household electricity information, comparing the intelligent household electricity information with a normal threshold value, and outputting an alarm signal if the intelligent household electricity information exceeds the normal threshold value; the intelligent terminal is connected with the intelligent household electricity monitoring platform through a communication network and used for accessing intelligent household electrical quantity information in the intelligent household electricity monitoring platform in real time. The intelligent household electricity monitoring module is used for acquiring electric quantity information of intelligent household appliances based on a wireless sensor network, a plurality of sensors are required to be correspondingly arranged on a plurality of electric appliances, the sensors need to be installed to change indoor circuits or change access ends of the electric appliances, and the sensors are invasive changes, on one hand, a plurality of sensors are required, the sensors are power-consuming, and the consumed electric quantity is large; on the other hand, the quality of the sensor is uneven, the sensor is not monitored, when the sensor breaks down, electric leakage can be caused, and potential safety hazards exist.
Disclosure of Invention
The invention solves the problems of large power consumption and potential safety hazard caused by the fact that the sensors are installed in an invasive mode in household power safety monitoring, provides the household appliance load intelligent identification system for the residential users, does not change the lines of indoor lines and electric appliances, and installs load identification at the input end of a main ammeter in a non-invasive mode, so that the use of a large number of sensors is reduced, and the safety and the high efficiency are realized.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an intelligent household appliance load identification system for residential users comprises a load identification device, a power grid monitoring platform, a user side and a flexible load socket,
the load identification device is arranged between the electric appliance and the main ammeter and is used for identifying the load of the electric appliance, acquiring the load curve of the electric appliance, converting the load curve into a digital signal and transmitting the digital signal to the power grid monitoring platform;
the power grid monitoring platform is used for comparing the digital signal with the proportioning database to generate an analysis result and transmitting the analysis result to a user side; the system comprises a database, a user side binding instruction and a matching database, wherein the database is used for receiving the user side binding instruction, processing the binding instruction and generating the matching database;
the user side receives an analysis result; the user side is also used for sending a binding instruction to the power grid monitoring platform;
the flexible load socket is used for connecting a common household socket and a variable frequency household appliance with real-time variable power consumption, recording the power consumption of the variable frequency household appliance and transmitting the power consumption to the load identification device.
The binding instruction comprises the actual use power of each household appliance, and the power grid monitoring platform is used for carrying out permutation and combination processing on the actual use power of each household appliance to generate a proportioning database. The power grid monitoring platform compares the digital signals acquired by the load identification device with the proportioning database, analyzes the service condition and the power consumption of the corresponding household appliance, reduces the use of the sensor and the non-invasive installation of the load identification device, saves the monitoring cost, reduces the potential safety hazard caused by the self fault of the sensor, and is safe and efficient.
Preferably, the load identification device comprises a power supply module, a load identification module, a timing module and a wireless transmission module, wherein the input end of the power supply module is connected with the output end of an electric appliance, the input end of the power supply module is connected with a general electric meter, and the power supply module is electrically connected with the load identification module, the timing module and the wireless transmission module; the load identification module identifies and records the change condition of the input load, and is electrically connected with the timing module; the timing module is used for timing loads, converting the acquired change condition of the input loads into a load curve in a time axis mode, and converting the load curve into a digital signal; the wireless transmission module is electrically connected with the timing module and transmits the acquired digital signals to the power grid monitoring platform.
Preferably, the load identification device is further provided with a self-checking module, and the self-checking module is electrically connected with the power supply module, the load identification module, the timing module and the wireless transmission module and is used for monitoring the real-time working states of the power supply module, the load identification module and the timing module.
If the self-checking module detects the equipment fault, the fault type is transmitted to the power grid monitoring platform through the wireless transmission module, and then the power grid monitoring platform sends the fault information to the user side. The self-checking module is arranged to prevent the loss of monitoring on the electric appliance due to the self fault of the load identification device, so that the household electric appliance is safer.
As preferred, flexible load socket, including ground wire inserted sheet, zero line inserted sheet, live wire inserted sheet and wiring hole, the wiring hole is used for connecting frequency conversion domestic appliance's plug, live wire inserted sheet cover is equipped with the mutual-inductor, it has control chip to connect between zero line inserted sheet and the live wire inserted sheet, the mutual-inductor is connected with the control chip electricity.
The voltage change of mutual-inductor response live wire inserted sheet, transmit control chip with voltage change, control chip passes through voltage change, the calculation obtains the power change, and change power, change into the signal output of certain wave frequency to live wire inserted sheet and zero line inserted sheet, the rethread live wire inserted sheet inserts live wire and zero line inserted sheet and inserts live wire and zero line output to load identification module, let load identification module discern, load identification module turns into power signal with the signal of certain wave frequency, transmit electric wire netting monitoring platform.
Preferably, the flexible load socket is provided with a phase controller, the phase controller is electrically connected with the control chip, and the phase controller controls the current of the control chip to be conducted when the current passes through the vicinity of the alternating current zero point.
The purpose is to reduce the loss of the electric quantity of the control chip, thereby reducing the electric quantity used for monitoring the electric equipment by a user.
The intelligent household appliance load identification system for the resident users is characterized by identifying unidentified flexible loads and specifically comprises the following steps: s1, collecting the power consumption of the user by the intelligent electric meter at the frequency f to obtain sampling points, and fitting a daily load curve of the user according to the sampling points;
s2, extracting a positive transient segment and a negative transient segment of the daily load curve of the user, and taking the condition that the amplitude of power change in delta t exceeds a preset value P1 as a transient judgment condition;
s3, taking two ends of the positive transient segment and the negative transient segment as first class feature points, counting the number N1 of the first class feature points, and sequentially connecting all the first class feature points along a time axis by a broken line to form a broken line graph;
s4, connecting all sampling points in sequence along the time axis direction by using line segments, traversing the sampling points, judging whether the included angle between two line segments connecting the sampling points is greater than a preset value, if the included angle is greater than the preset value, bringing the sampling points into a second type of characteristic points, and counting the number N2 of the second type of characteristic points;
s5, if the difference value between N2 and N1 exceeds the preset value, discarding the daily load curve of the user on the current day, and executing the step S1 again on the second day, otherwise, entering the step S6;
s6, deleting the second type of characteristic points far away from the first type of characteristic points, connecting the remaining second type of characteristic points by a broken line, and then fitting the curve to be used as an adjusting load curve;
s7, to adjust the load curve, to re-extract the positive transient segment and the negative transient segment,
s8, establishing a power transient table according to the positive transient segment and the negative transient segment;
and S9, matching the power transient segments according to the power transient table, matching the negative transient segments with the positive transient segments if the negative transient segments with equivalent power can be found within a set time length S after the time stamps of the positive transient segments, associating the negative transient segments with the positive transient segments if a plurality of matched negative transient segments exist, generating a load identification record for the matched positive transient segments and negative transient segments, and storing the associated time stamps of the positive transient segments and the negative transient segments.
Preferably, the power transient table includes a number of values of a rated positive transient power and a total number corresponding to the number, where the rated positive transient power is an average power of a positive transient segment of the same class, and a classification process of the positive transient segment of the same class is as follows:
s801, counting the number of positive transient segments, the power of the positive transient segments and the power of the negative transient segments within a period of time T;
s802, sequencing the residual positive transient power, and classifying positive transient segments by an error range of 2%; during classification, positive transient segments and negative transient segments with power variation smaller than 1W need to be removed.
Preferably, the step S9 specifically includes:
when the number N of the rated positive transient power is larger than or equal to a set value N, whether the power of a negative transient segment matched with the rated positive transient power exists or not is judged within a set time length S, if yes, a load identification record is generated, and if not, a mark is not identified.
Preferably, the set time period S is 24h or 48 h.
Preferably, the setting process of the set time length S includes: and continuously switching on and off the lamp at a first set frequency to set the set time length S to be 24h, and continuously switching on and off the lamp at a second set frequency to set the set time length S to be 48h, wherein the first set frequency is 1S, the second set frequency is 2S, and the error between the time interval of turning on and off the lamp and the set first set frequency and second set frequency is less than 1%.
The invention has the following beneficial effects: due to the non-invasive installation of the load identification device, the use of the sensor is reduced, the monitoring cost is saved, the potential safety hazard caused by the self fault of the sensor is reduced, and the safety and the high efficiency are realized; the self-checking module is arranged to avoid the loss of monitoring on the electric appliance caused by the self fault of the load identification device, so that the household electric appliance is safer.
Drawings
FIG. 1 is a system configuration diagram of the present embodiment;
FIG. 2 is a schematic view of the flexible load socket of the present embodiment;
wherein: 1. The system comprises a load identification device 2, an electrical appliance 3, a general electric meter 4, a power grid monitoring platform 5, a user terminal 6, a power supply module 7, a load identification module 8, a timing module 9, a wireless transmission module 10, a self-checking module 11, an alarm module 12, a fuse 13, a washing machine 14, an air conditioner 15, a television 16, a microwave oven 17, an electric cooker 18, a flexible load socket 19, a ground wire insertion piece 20, a zero wire insertion piece 21, a live wire insertion piece 22, a wiring hole 23, a mutual inductor 24, a control chip 25 and a phase controller.
Detailed Description
Example (b):
the present embodiment proposes an intelligent household appliance load identification system for residential users, referring to fig. 1 and 2, comprising a load identification device 1, a power grid monitoring platform 4, a user terminal 5 and a flexible load socket 18,
the load identification device 1 is arranged between the electric appliance 2 and the main electric meter 3 and is used for identifying the load of the electric appliance 2, acquiring the load curve of the electric appliance 2, converting the load curve into a digital signal and transmitting the digital signal to the power grid monitoring platform 4; the load identification device 1 comprises a power supply module 6, a load identification module 7, a timing module 8 and a wireless transmission module 9,
the input end of the power supply module 6 is connected with the output end of the electric appliance 2, the input end of the power supply module 6 is connected with the general electric meter 3, and the power supply module 6 is electrically connected with the load identification module 7, the timing module 8 and the wireless transmission module 9;
the load identification module 7 identifies and records the change condition of the input load, and the load identification module 7 is electrically connected with the timing module 8;
the timing module 8 is used for timing loads, converting the acquired change condition of the input loads into a load curve in a time axis mode, and converting the load curve into a digital signal;
the wireless transmission module 9 is electrically connected with the timing module 8 and transmits the acquired digital signals to the power grid monitoring platform 4.
The load identification device 1 is further provided with a self-checking module 10, wherein the self-checking module 10 is electrically connected with the power supply module 6, the load identification module 7, the timing module 8 and the wireless transmission module 9 and is used for monitoring the real-time working states of the power supply module 6, the load identification module 7 and the timing module 8.
If the self-checking module detects the equipment fault, the fault type is transmitted to the power grid monitoring platform through the wireless transmission module, and then the power grid monitoring platform sends the fault information to the user side. The self-checking module is arranged to prevent the loss of monitoring on the electric appliance due to the self fault of the load identification device, so that the household electric appliance is safer.
The load identification device 1 is provided with an alarm module 11, and the alarm module 11 is electrically connected with a self-checking module 10. The alarm module 11 is an audible and visual alarm. When the self-checking module detects abnormal conditions, the audible and visual alarm is started to remind the user.
The power grid monitoring platform 4 is used for comparing the digital signal with the proportioning database to generate an analysis result and transmitting the analysis result to the user terminal 5; the system comprises a database, a user terminal 5 and a binding instruction, wherein the database is used for receiving the binding instruction of the user terminal 5, processing the binding instruction and generating a proportioning database;
the user end 5 receives the analysis result; the user terminal 5 is also used for sending a binding instruction to the power grid monitoring platform 4
And the flexible load socket 18 is used for connecting a common household socket and a variable frequency household appliance with real-time variable power consumption, recording the power consumption of the variable frequency household appliance and transmitting the power consumption to the load identification device 1. Flexible load socket 18, including ground wire inserted sheet 19, zero line inserted sheet 20, live wire inserted sheet 21 and wiring hole 22, the wiring hole is used for connecting frequency conversion domestic appliance's plug, and live wire inserted sheet 21 cover is equipped with mutual-inductor 23, has connect control chip 24 between zero line inserted sheet 20 and the live wire inserted sheet 21, and mutual-inductor 23 is connected with control chip 24 electricity. The flexible load socket 18 is provided with a phase controller 25, the phase controller 25 is electrically connected with the control chip 24, and the phase controller 25 controls the conduction of the current of the control chip 24 when the current passes through the vicinity of the alternating current zero point. The purpose is to reduce the loss of the electric quantity of the control chip, thereby reducing the electric quantity used for monitoring the electric equipment by a user.
The voltage change of mutual-inductor response live wire inserted sheet, transmit control chip with voltage change, control chip passes through voltage change, the calculation obtains the power change, and change power, change into the signal output of certain wave frequency to live wire inserted sheet and zero line inserted sheet, the rethread live wire inserted sheet inserts live wire and zero line inserted sheet and inserts live wire and zero line output to load identification module, let load identification module discern, load identification module turns into power signal with the signal of certain wave frequency, transmit electric wire netting monitoring platform.
A fuse 12 is connected between the power module 6 and the electrical appliance 2. The fuse has the function of preventing the load identification device from being burnt out by large current generated when the electrical appliance is in short circuit, and the service life of the load identification device is prolonged. The electric appliances 2 are a washing machine 13, an air conditioner 14, a television 15, a microwave oven 16 and an electric cooker 17 which are connected in parallel, the user side 5 is a mobile phone app, and the mobile phone app is convenient and visual to operate in a mobile and visual mode.
The binding instruction comprises the actual use power of each household appliance, and the power grid monitoring platform is used for carrying out permutation and combination processing on the actual use power of each household appliance to generate a proportioning database. The power grid monitoring platform compares the digital signals acquired by the load identification device with the proportioning database, analyzes the service condition and the power consumption of the corresponding household appliance, reduces the use of the sensor and the non-invasive installation of the load identification device, saves the monitoring cost, reduces the potential safety hazard caused by the self fault of the sensor, and is safe and efficient.
The invention also provides an intelligent household appliance load identification method for the resident user, which adopts the intelligent household appliance load identification system for the resident user to identify the unidentified flexible load, and specifically comprises the following steps:
s1, collecting the power consumption of the user by the intelligent electric meter at the frequency f to obtain sampling points, and fitting a daily load curve of the user according to the sampling points;
s2, extracting a positive transient segment and a negative transient segment of the daily load curve of the user, and taking the condition that the amplitude of power change in delta t exceeds a preset value P1 as a transient judgment condition;
s3, taking two ends of the positive transient segment and the negative transient segment as first class feature points, counting the number N1 of the first class feature points, and sequentially connecting all the first class feature points along a time axis by a broken line to form a broken line graph;
s4, connecting all sampling points in sequence along the time axis direction by using line segments, traversing the sampling points, judging whether the included angle between two line segments connecting the sampling points is greater than a preset value, if the included angle is greater than the preset value, bringing the sampling points into a second type of characteristic points, and counting the number N2 of the second type of characteristic points;
s5, if the difference value between N2 and N1 exceeds the preset value, discarding the daily load curve of the user on the current day, and executing the step S1 again on the second day, otherwise, entering the step S6;
s6, deleting the second type of characteristic points far away from the first type of characteristic points, connecting the remaining second type of characteristic points by a broken line, and then fitting the curve to be used as an adjusting load curve;
s7, to adjust the load curve, to re-extract the positive transient segment and the negative transient segment,
s8, establishing a power transient table according to the positive transient segment and the negative transient segment; the power transient table comprises a plurality of numerical values of rated positive transient power and the corresponding total number of the numerical values, the rated positive transient power is the average power of the positive transient segments of the same class, and the classification process of the positive transient segments of the same class is as follows: reference is made to the following table:
| rated positive transient power | Total number of |
| |
13 |
| 12W | 24 |
| 30W | 41 |
| |
23 |
| … | … |
S801, counting the number of positive transient segments, the power of the positive transient segments and the power of the negative transient segments within a period of time T;
s802, sequencing the residual positive transient power, and classifying positive transient segments by an error range of 2%; during classification, positive transient segments and negative transient segments with power variation smaller than 1W need to be removed.
And S9, matching the power transient segments according to the power transient table, matching the negative transient segments with the positive transient segments if the negative transient segments with equivalent power can be found within a set time length S after the time stamps of the positive transient segments, associating the negative transient segments with the positive transient segments if a plurality of matched negative transient segments exist, generating a load identification record for the matched positive transient segments and negative transient segments, and storing the associated time stamps of the positive transient segments and the negative transient segments.
Step S9 specifically includes:
and when the number N of the rated positive transient power is larger than or equal to a set value N, whether the power of a negative transient segment matched with the rated positive transient power exists or not is judged within a set time length S, if yes, a load identification record is generated, and if not, a mark is not identified.
The set time length S is 24h or 48h, and the setting process comprises the following steps: the lamp is continuously switched on and off at a first set frequency, the set time length S is set to be 24h, the lamp is continuously switched on and off at a second set frequency, the set time length S is set to be 48h, the first set frequency is 1S, the second set frequency is 2S, and the error between the time interval of switching on and switching off the lamp and the set first set frequency and the set second set frequency is less than 1%.
If the user cooperates with the single household appliances which are turned on in turn, the identification process is simplified, the household appliances corresponding to the load can be quickly known, the power change of the household appliances with non-flexible power, namely pure-resistance household appliances, can be directly identified constantly, the working power of the household appliances with flexible power, namely the household appliances working in a frequency conversion mode, such as computers, air conditioners and the like, is not fixed, the power of the household appliances needs to be collected within a certain time, a power transient table is established, the pairing of power transient segments is carried out according to the power transient table, the load information and the power consumption are identified, and the line change of indoor lines and the line change of the household appliances are not carried out.
The classified positive transient segment takes the average power of the classified positive transient segment as the rated positive transient power, so that the load identification accuracy is favorably improved, meanwhile, the positive transient segment with the power change smaller than 1W is removed, the positive transient segment with the small-range power change is filtered, the load identification efficiency is favorably improved, statistics is carried out in one month, the use frequency of the household appliance in one month can be obtained, and the follow-up more comprehensive analysis of the power utilization condition of a user is favorably carried out.
For the household appliances with flexible power, namely the household appliances working in a variable frequency mode, the power in the opening and closing processes is equivalent, the power in the working process is constantly changed, the power transient is inconsistent, when the number N of the rated positive transient power is larger than or equal to a set value N in a period of time, the classified positive transient segment corresponding to the rated positive transient power can be considered to belong to a class of household appliances working in a variable frequency mode, if the power of the negative transient segment matched with the rated positive transient power can be found in a set time S, the working period of the class of household appliances working in the variable frequency mode can be found, a load identification record is generated, and a user can know the household appliances corresponding to the load identification record.
The absolute value of the power of the negative transient segment is 0-2% different from the absolute value of the rated positive transient power, and the pairing is considered to be successful.
The invention has the following advantages: due to the non-invasive installation of the load identification device, the use of the sensor is reduced, the monitoring cost is saved, the potential safety hazard caused by the self fault of the sensor is reduced, and the safety and the high efficiency are realized; the self-checking module is arranged to avoid the loss of monitoring on the electric appliance caused by the self fault of the load identification device, so that the household electric appliance is safer.
Claims (10)
1. An intelligent household appliance load identification system for resident users is characterized by comprising a load identification device (1), a power grid monitoring platform (4), a user side (5) and a flexible load socket (18),
the load identification device (1) is arranged between the electric appliance (2) and the general electric meter (3) and is used for identifying the load of the electric appliance (2), acquiring the load curve of the electric appliance (2), converting the load curve into a digital signal and transmitting the digital signal to the power grid monitoring platform (4);
the power grid monitoring platform (4) is used for comparing the digital signals with the proportioning database to generate an analysis result and transmitting the analysis result to the user side (5); the system comprises a database, a user side (5) and a database, wherein the database is used for receiving a binding instruction of the user side and processing the binding instruction to generate a ratio database;
the user side (5) receives the analysis result; the user side (5) is also used for sending a binding instruction to the power grid monitoring platform (4);
the flexible load socket (18) is used for connecting a common household socket and a variable frequency household appliance with real-time variable power consumption, recording the power consumption of the variable frequency household appliance and transmitting the power consumption to the load identification device (1).
2. An intelligent household appliance load identification system for residential users as claimed in claim 1, wherein said load identification device (1) comprises a power supply module (6), a load identification module (7), a timing module (8) and a wireless transmission module (9),
the input end of the power supply module (6) is connected with the output end of the electric appliance (2), the input end of the power supply module (6) is connected with the general electric meter (3), and the power supply module (6) is electrically connected with the load identification module (7), the timing module (8) and the wireless transmission module (9);
the load identification module (7) identifies and records the change condition of the input load, and the load identification module (7) is electrically connected with the timing module (8);
the timing module (8) is used for timing loads, converting the acquired change condition of the input loads into a load curve in a time axis mode, and converting the load curve into a digital signal;
the wireless transmission module (9) is electrically connected with the timing module (8) and transmits the acquired digital signals to the power grid monitoring platform (4).
3. The intelligent household appliance load identification system for the resident users as claimed in claim 2, wherein the load identification device (1) is further provided with a self-checking module (10), and the self-checking module (10) is electrically connected with the power supply module (6), the load identification module (7), the timing module (8) and the wireless transmission module (9) and is used for monitoring the real-time working states of the power supply module (6), the load identification module (7) and the timing module (8).
4. The household appliance load intelligent identification system for the resident users according to claim 1, characterized in that, the flexible load socket (18) comprises a ground wire inserting piece (19), a zero line inserting piece (20), a live wire inserting piece (21) and a wiring hole (22), the wiring hole is used for connecting a plug of a variable frequency household appliance, the live wire inserting piece (21) is sleeved with a mutual inductor (23), a control chip (24) is connected between the zero line inserting piece (20) and the live wire inserting piece (21), and the mutual inductor (23) is electrically connected with the control chip (24).
5. An intelligent household appliance load identification system for residential users as claimed in claim 4, wherein said flexible load socket (18) is provided with a phase controller (25), said phase controller (25) is electrically connected with the control chip (24), said phase controller (25) controls the current of the control chip (24) to be conducted when the current passes near the zero point of the alternating current.
6. An intelligent household appliance load identification method for residential users, which adopts the intelligent household appliance load identification system for residential users as claimed in claim 1, and is characterized in that the method for identifying unidentified flexible loads specifically comprises the following steps: s1, collecting the power consumption of the user by the intelligent electric meter at the frequency f to obtain sampling points, and fitting a daily load curve of the user according to the sampling points;
s2, extracting a positive transient segment and a negative transient segment of the daily load curve of the user, and taking the condition that the amplitude of power change in delta t exceeds a preset value P1 as a transient judgment condition;
s3, taking two ends of the positive transient segment and the negative transient segment as first class feature points, counting the number N1 of the first class feature points, and sequentially connecting all the first class feature points along a time axis by a broken line to form a broken line graph;
s4, connecting all sampling points in sequence along the time axis direction by using line segments, traversing the sampling points, judging whether the included angle between two line segments connecting the sampling points is greater than a preset value, if the included angle is greater than the preset value, bringing the sampling points into a second type of characteristic points, and counting the number N2 of the second type of characteristic points;
s5, if the difference value between N2 and N1 exceeds the preset value, discarding the daily load curve of the user on the current day, and executing the step S1 again on the second day, otherwise, entering the step S6;
s6, deleting the second type of characteristic points far away from the first type of characteristic points, connecting the remaining second type of characteristic points by a broken line, and then fitting the curve to be used as an adjusting load curve;
s7, to adjust the load curve, to re-extract the positive transient segment and the negative transient segment,
s8, establishing a power transient table according to the positive transient segment and the negative transient segment;
and S9, matching the power transient segments according to the power transient table, matching the negative transient segments with the positive transient segments if the negative transient segments with equivalent power can be found within a set time length S after the time stamps of the positive transient segments, associating the negative transient segments with the positive transient segments if a plurality of matched negative transient segments exist, generating a load identification record for the matched positive transient segments and negative transient segments, and storing the associated time stamps of the positive transient segments and the negative transient segments.
7. An intelligent identification method for household electrical appliance loads of residential users as claimed in claim 6, wherein said power transient table comprises a plurality of values of rated positive transient power and the corresponding total number thereof, said rated positive transient power being the average power of the same type of positive transient segment, the classification process of the same type of positive transient segment is as follows:
s801, counting the number of positive transient segments, the power of the positive transient segments and the power of the negative transient segments within a period of time T;
s802, sequencing the residual positive transient power, and classifying positive transient segments by an error range of 2%; during classification, positive transient segments and negative transient segments with power variation smaller than 1W need to be removed.
8. The method as claimed in claim 6, wherein said step S9 comprises:
when the number N of the rated positive transient power is larger than or equal to a set value N, whether the power of a negative transient segment matched with the rated positive transient power exists or not is judged within a set time length S, if yes, a load identification record is generated, and if not, a mark is not identified.
9. An intelligent household appliance load identification method as claimed in claim 8, wherein the set time length S is 24h or 48 h.
10. An intelligent household electrical appliance load identification method for residential users as claimed in claim 9, wherein said setting of said set time duration S comprises: and continuously switching on and off the lamp at a first set frequency to set the set time length S to be 24h, and continuously switching on and off the lamp at a second set frequency to set the set time length S to be 48h, wherein the first set frequency is 1S, the second set frequency is 2S, and the error between the time interval of turning on and off the lamp and the set first set frequency and second set frequency is less than 1%.
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