Device for improving useful energy conversion rate of electric appliance and power-saving control algorithm

Abstract

The invention discloses a device for improving the useful energy conversion rate of an electric appliance and a power-saving control algorithm. The method comprises the steps of S1, intelligent sensing; s2, data analysis; s3, generating a strategy; s4, displaying the data; the invention relates to the technical field of energy-saving management. According to the device for improving the useful energy conversion rate of the electric appliance and the power-saving control algorithm, the power-saving control algorithm is set, harmonic removal operation in a line is realized, then a historical data peak threshold value is extracted and compared with current data, a peak value is predicted and analyzed, and meanwhile, the balance condition of three-phase current and voltage is determined; and the phase difference between the current digital signal and the voltage digital signal is analyzed, the data analysis operation is carried out in the real-time data acquisition operation, the management operation with higher efficiency is realized, the transmission regulation and control are carried out according to the energy-saving strategy obtained after the analysis, and the energy-saving management with higher degree is completed. And the energy consumption of the electrical equipment for a long time is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving management, and in particular to a device for improving the useful energy conversion rate of electrical appliances and a power-saving control algorithm. Background Art

[0002] With the continuous growth of energy demand and the increasing awareness of environmental protection, improving the energy utilization efficiency of electrical appliances and reducing energy consumption have become important directions in the development of current electrical technology. Currently, most electrical equipment has low energy conversion efficiency during operation due to various factors such as design, control strategy, and operating environment, resulting in a large amount of energy being wasted.

[0003] The reference patent name is: A building energy equipment energy-saving management system based on the Internet of Things cloud platform (patent publication number: CN114648209A, patent publication date: 2022-06-21), including an electric energy generation prediction module, a solar energy management module, an electric energy parameter analysis module, a cloud computing module and an electrical equipment control module; the solar energy management module compares the total electric energy generation with the load demand. When the total electric energy generation is greater than the load demand, solar energy is used to power household electrical appliances. When the total electric energy generation is less than or equal to the load demand, the public power grid powers household electrical appliances; the cloud computing module screens out dispatchable equipment based on the historical usage data of household electrical appliances and user preferences, and then formulates a power consumption strategy based on the real-time peak and valley electricity prices. The electrical equipment control module adjusts the start and stop time and operating power of household electrical appliances based on the power consumption strategy.

[0004] Based on the description in the above-mentioned documents, during the use of existing electrical appliances, internal electrical energy pollution caused by three-phase imbalance, harmonic interference, and voltage and current fluctuations results in excessive energy consumption of the appliances. In addition, when problems are discovered in the actual processing process, feedback and regulation operations will increase the loss cost and pose a safety hazard. Therefore, the present invention provides a device for improving the useful energy conversion rate of electrical appliances and a power-saving control algorithm. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a device for improving the useful energy conversion rate of electrical appliances and a power-saving control algorithm, which solves the problem of internal power pollution caused by three-phase imbalance, harmonic interference, and voltage and current fluctuations during the use of existing electrical appliances, resulting in excessive energy consumption of electrical appliances.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a power-saving control algorithm for improving the useful energy conversion rate of electrical appliances, comprising:

[0007] S1. Intelligent sensing: The sensor array is used to collect the operating parameters and environmental parameters of the electrical appliances, convert the collected analog signals into digital signals, transmit them to the data analysis step for processing, and store the data in the database;

[0008] S2. Data Analysis: Build a data analysis model. Extract digital signals and introduce them into the data analysis model to first remove harmonics from the line. Then extract the peak threshold of historical data, compare it with the current data, and predict the peak value for analysis. Simultaneously, determine the balance of three-phase current and voltage, and analyze the phase difference between the current and voltage digital signals. Generate the analysis results and transmit them.

[0009] S3, Strategy Generation: Based on the analysis results, the required adjustment strategy is formed and transmitted to the corresponding execution unit for control;

[0010] S4. Data display: The analysis results and generated strategies are presented in the form of charts and text.

[0011] Preferably, the operation of collecting the operating parameters and environmental parameters of the electrical appliance in S1 is:

[0012] Set the same collection time node to collect current, voltage and power data during the operation of the appliance;

[0013] The internal and external temperature and humidity data of the appliance are collected, and the historical data thresholds are compared with the current collected data, and the control unit is used to control the environmental parameters;

[0014] The data is classified, extracted and processed to form a table with positioning function.

[0015] Preferably, the operation of forming a table with a positioning function is:

[0016] The table uses the data categories to be collected as column titles and the timestamps corresponding to the collected time nodes as row titles. The square where the vertical position of the column title intersects the horizontal position of the row title is the result column.

[0017] Then, the collected data text content is matched with the column and row headers of the table. After matching the same header content, the collected numerical results are filled into the result column;

[0018] And realize the verification operation of the data in the result column, and realize the modification and compensation of the data.

[0019] Preferably, the operation of establishing the data analysis model in S2 is:

[0020] Establish a coordinate axis, with time as the horizontal axis and current data and voltage data as the vertical axis, starting from the starting point, and the horizontal axis and the vertical axis are perpendicular to each other;

[0021] The nodes of the horizontal axis are determined with the same time period, and the nodes of the vertical axis are determined with the reasonable range values of the current data and voltage data, and the nodes are equidistant;

[0022] The digital signal is then transmitted to the data analysis model to form a waveform diagram to implement the analysis operation.

[0023] Preferably, the harmonic removal operation in the line implemented in S2 is:

[0024] After the waveform data is introduced into the coordinate axis, the extended window is set to move on the waveform and the waveform curve segment is clarified;

[0025] After the waveform curve is smoothed, an ideal sine waveform is introduced for comparison. Multiple comparison points are set in the vertical axis direction, and a ray is established along the horizontal direction of the horizontal axis. The first intersection with the waveform curve segment and the sine waveform is marked as reference point A. m and B m , compare the values of the reference points to determine the harmonic data that does not meet the requirements.

[0026] Preferably, the operation of moving the expansion window on the waveform graph and clarifying the curve segments of the waveform graph is:

[0027] Set the expansion window to F(u, v), where u refers to the length of the expansion window's border parallel to the horizontal axis, and v refers to the width of the expansion window's border parallel to the vertical axis. The expansion window moves by a distance of L each time, and the movement direction is to keep the lower left corner of the current expansion window moving to the intersection of the current expansion window and the waveform curve segment to achieve the next waveform curve segment acquisition;

[0028] Based on F(u, v), each waveform curve segment image is expanded k times, and the expanded waveform curve segment is segmented, with the change point of each waveform curve segment change as the segmentation point. The change of the waveform curve segment is the change of the curve's amplitude, and the connection between adjacent segmentation points is realized;

[0029] The midpoints of two adjacent line segments are extracted and connected to form the required line segment, and the midpoint of the required line segment is set as the connection point. Then, the connection points are connected in sequence through smooth curves in the order of time nodes to form a new waveform curve segment, and the starting point and end point of the new waveform curve segment are consistent with the starting point and end point of the historical waveform curve segment.

[0030] Preferably, the operation of comparing the values of the reference points to determine the harmonic data that does not meet the requirements is:

[0031] Based on reference point A m and B m , extract the values corresponding to the horizontal axis positions as X cm and X dm , and X cm Indicates that the horizontal axis value corresponding to the mth reference point A is X c , X dm Indicates that the horizontal axis value corresponding to the mth reference point B is X d ;

[0032] By comparing X from the first reference point to the mth reference point cm and X dm The value between the two sets is set to [e1, e2], and there is , the waveform curve segment at the current reference point does not meet the requirements.

[0033] Preferably, the operation of extracting the peak threshold of historical data, comparing it with the current data, and predicting the peak value for analysis in S2 is:

[0034] By extracting the optimized current waveform curve, determining the periodic curve segment of the current waveform curve;

[0035] The intersection of the current waveform curve and the horizontal axis is determined at the horizontal axis, and the first periodic curve segment is from the second intersection point to the fourth intersection point, and the adjacent equidistant periodic curve segments after the fourth intersection point are extracted in sequence to achieve coverage comparison of adjacent periodic curve segments, and the periodic curve segments with the same number of coverage times are normal periodic curve segments;

[0036] The peak value of the normal cycle curve segment is extracted, and the peak value of the normal cycle curve segment is compared with the historical data peak value threshold. If the peak value of the normal cycle curve segment exceeds the threshold, it is predicted that a current suppression operation is required.

[0037] Preferably, the operation of determining the balance between the three-phase current and voltage in S2 is:

[0038] The voltage data of phase A, phase B and phase C are extracted and formed into voltage waveform curve segments;

[0039] Then, judgment nodes are set at equal intervals on the horizontal axis to determine whether the values of the waveform curve segments of phases A, B, and C on the vertical axis are equal. If they are not equal, an unbalanced feedback of the three-phase current and voltage is formed;

[0040] The operation of S2 for analyzing the phase difference between the current and voltage digital signals is as follows:

[0041] By extracting the current waveform curve, determining the periodic curve segment of the current waveform curve;

[0042] Then, the voltage waveform curve of the current electrical appliance in the same time period is introduced, and the voltage waveform curve is introduced into the coordinate axis to realize comparison with the current waveform curve;

[0043] The intersection points of the current and voltage digital signals on the horizontal axis are determined in sequence, and whether they are the same is determined by the phase difference between the intersection points. When abnormal data is generated, the control feedback of the equipment is realized.

[0044] The present invention also discloses a device for improving the useful energy conversion rate of electrical appliances, including electrical equipment, a collection cabinet, a power-saving cabinet and a touch display screen. The power-saving cabinet realizes the regulation of useless energy in the circuit through a built-in intelligent chip, power-saving algorithm processing, dI / dt suppression and harmonic removal.

[0045] The present invention provides a device and power-saving control algorithm for improving the useful energy conversion rate of electrical appliances. Compared with the existing technology, it has the following advantages:

[0046] 1. The device for improving the useful energy conversion rate of electrical appliances and the power-saving control algorithm are provided with a power-saving control algorithm. By implementing the harmonic removal operation in the line, the peak threshold of historical data is extracted and compared with the current data to predict the peak value for analysis. At the same time, the balance of three-phase current and voltage is determined, and the phase difference between the current and voltage digital signals is analyzed. The data analysis operation is performed simultaneously with the operation of real-time data collection to achieve more efficient management operations, and transmission control is performed based on the energy-saving strategy obtained after analysis, completing a higher degree of energy-saving management, so that the energy consumption of electrical equipment over a long period of time can be optimized.

[0047] 2. The device for improving the useful energy conversion rate of electrical appliances and the power-saving control algorithm establish a data analysis model, extract digital signals and introduce them into the data analysis model to first achieve harmonic removal in the line, thereby using an extended window to move on the waveform graph and achieve a clear operation of the waveform curve segment. It can not only effectively identify the influence of other curve segments, but also optimize the curve, better realize the evaluation operation of subsequent data, and ensure more accurate subsequent data processing after feedback optimization of harmonic data.

[0048] 3. The device for improving the useful energy conversion rate of electrical appliances and the power-saving control algorithm realize feedback of current suppression operation by predicting data peak value, realize regulation feedback of three-phase power of equipment by unbalanced situation of three-phase current and voltage, and determine regulation feedback when abnormality occurs by analyzing the phase difference between current and voltage digital signals. In combination with this, various energy-saving control operations are realized, making it possible for electrical appliances to realize energy-saving operation with greater possibility, and significantly improving the efficiency of useful energy of electrical appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a principle block diagram of the power saving control algorithm of the present invention;

[0050] Figure 2 The following is a flowchart of the operation of establishing the data analysis model of the present invention;

[0051] Figure 3 FIG. 4 is an operational flow chart of the harmonic removal operation of the present invention. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] See also Figure 1-Figure 3 , the present invention provides three technical solutions:

[0054] Embodiment 1: A power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance, comprising:

[0055] S1. Intelligent sensing: The sensor array is used to collect the operating parameters and environmental parameters of the electrical appliances, convert the collected analog signals into digital signals, transmit them to the data analysis step for processing, and store the data in the database;

[0056] S2. Data Analysis: Build a data analysis model. Extract digital signals and introduce them into the data analysis model to first remove harmonics from the line. Then extract the peak threshold of historical data, compare it with the current data, and predict the peak value for analysis. Simultaneously, determine the balance of three-phase current and voltage, and analyze the phase difference between the current and voltage digital signals. Generate the analysis results and transmit them.

[0057] S3, Strategy Generation: Based on the analysis results, the required adjustment strategy is formed and transmitted to the corresponding execution unit for control;

[0058] S4. Data display: The analysis results and generated strategies are presented in the form of charts and text.

[0059] By setting up a power-saving control algorithm, the harmonic removal operation in the line is realized, and then the peak threshold of historical data is extracted to compare with the current data and predict the peak to achieve analysis. At the same time, the balance of three-phase current and voltage is determined, and the phase difference between the current and voltage digital signals is analyzed. The data analysis operation is performed simultaneously with the real-time data collection operation to achieve more efficient management operations, and transmission control is carried out based on the energy-saving strategy obtained after analysis, completing a higher degree of energy-saving management, so that the energy consumption of electrical equipment over a long period of time can be optimized.

[0060] In the embodiment of the present invention, the operation of collecting the operating parameters and environmental parameters of the electrical appliance in S1 is as follows:

[0061] Set the same collection time node to collect current, voltage and power data during the operation of the appliance;

[0062] The internal and external temperature and humidity data of the appliance are collected, and the historical data thresholds are compared with the current collected data, and the control unit is used to control the environmental parameters;

[0063] The data is classified, extracted and processed to form a table with positioning function.

[0064] In the embodiment of the present invention, the operations for forming a table with a positioning function are as follows:

[0065] The table uses the data categories to be collected as column titles and the timestamps corresponding to the collected time nodes as row titles. The square where the vertical position of the column title intersects the horizontal position of the row title is the result column.

[0066] Then, the collected data text content is matched with the column and row headers of the table. After matching the same header content, the collected numerical results are filled into the result column;

[0067] And realize the verification operation of the data in the result column, and realize the modification and compensation of the data.

[0068] In the embodiment of the present invention, the operation of establishing the data analysis model in S2 is:

[0069] Establish a coordinate axis, with time as the horizontal axis and current data and voltage data as the vertical axis, starting from the starting point, and the horizontal axis and the vertical axis are perpendicular to each other;

[0070] The nodes of the horizontal axis are determined with the same time period, and the nodes of the vertical axis are determined with the reasonable range values of the current data and voltage data, and the nodes are equidistant;

[0071] The digital signal is then transmitted to the data analysis model to form a waveform diagram to implement the analysis operation.

[0072] In the embodiment of the present invention, the harmonic removal operation in the line implemented in S2 is:

[0073] After the waveform data is introduced into the coordinate axis, the extended window is set to move on the waveform and the waveform curve segment is clarified;

[0074] After the waveform curve is smoothed, an ideal sine waveform is introduced for comparison. Multiple comparison points are set in the vertical axis direction, and a ray is established along the horizontal direction of the horizontal axis. The first intersection with the waveform curve segment and the sine waveform is marked as reference point A. m and B m , compare the values of the reference points to determine the harmonic data that does not meet the requirements.

[0075] In the embodiment of the present invention, the operation of moving the expansion window on the waveform graph and clarifying the curve segments of the waveform graph is as follows:

[0076] Set the expansion window to F(u, v), where u refers to the length of the expansion window's border parallel to the horizontal axis, and v refers to the width of the expansion window's border parallel to the vertical axis. The expansion window moves by a distance of L each time, and the movement direction is to keep the lower left corner of the current expansion window moving to the intersection of the current expansion window and the waveform curve segment to achieve the next waveform curve segment acquisition;

[0077] Based on F(u, v), each waveform curve segment image is expanded k times, and the expanded waveform curve segment is segmented, with the change point of each waveform curve segment change as the segmentation point. The change of the waveform curve segment is the change of the curve's amplitude, and the connection between adjacent segmentation points is realized;

[0078] The midpoints of two adjacent line segments are extracted and connected to form the required line segment, and the midpoint of the required line segment is set as the connection point. Then, the connection points are connected in sequence through smooth curves in the order of time nodes to form a new waveform curve segment, and the starting point and end point of the new waveform curve segment are consistent with the starting point and end point of the historical waveform curve segment.

[0079] In the embodiment of the present invention, the operation of comparing the values of the reference points to determine the harmonic data that does not meet the requirements is:

[0080] Based on reference point A m and B m , extract the values corresponding to the horizontal axis positions as X cm and X dm , and X cmIndicates that the horizontal axis value corresponding to the mth reference point A is X c , X dm Indicates that the horizontal axis value corresponding to the mth reference point B is X d ;

[0081] By comparing X from the first reference point to the mth reference point cm and X dm The value between the two sets is set to [e1, e2], and there is , the waveform curve segment at the current reference point does not meet the requirements.

[0082] Among them, by establishing a data analysis model and extracting digital signals and introducing them into the data analysis model, the harmonic removal operation in the line is first realized, and then the expansion window is used to move on the waveform graph and realize the clarification operation of the waveform curve segment. It can not only effectively identify the influence of other curve segments, but also optimize the curve, better realize the evaluation operation of subsequent data, and after the feedback of harmonic data is optimized, it ensures that the subsequent data processing is more accurate.

[0083] In the embodiment of the present invention, the operation of extracting the peak threshold of historical data, comparing it with the current data, and predicting the peak value for analysis in S2 is as follows:

[0084] By extracting the optimized current waveform curve, determining the periodic curve segment of the current waveform curve;

[0085] The intersection of the current waveform curve and the horizontal axis is determined at the horizontal axis, and the first periodic curve segment is from the second intersection point to the fourth intersection point, and the adjacent equidistant periodic curve segments after the fourth intersection point are extracted in sequence to achieve coverage comparison of adjacent periodic curve segments, and the periodic curve segments with the same number of coverage times are normal periodic curve segments;

[0086] The peak value of the normal cycle curve segment is extracted, and the peak value of the normal cycle curve segment is compared with the historical data peak value threshold. If the peak value of the normal cycle curve segment exceeds the threshold, it is predicted that a current suppression operation is required.

[0087] In the embodiment of the present invention, the operation of determining the balance between the three-phase current and voltage in S2 is:

[0088] The voltage data of phase A, phase B and phase C are extracted and formed into voltage waveform curve segments;

[0089] Then, judgment nodes are set at equal intervals on the horizontal axis to determine whether the values of the waveform curve segments of phases A, B, and C on the vertical axis are equal. If they are not equal, an unbalanced feedback of the three-phase current and voltage is formed;

[0090] The operation of S2 for analyzing the phase difference between the current and voltage digital signals is as follows:

[0091] By extracting the current waveform curve, determining the periodic curve segment of the current waveform curve;

[0092] Then, the voltage waveform curve of the current electrical appliance in the same time period is introduced, and the voltage waveform curve is introduced into the coordinate axis to realize comparison with the current waveform curve;

[0093] The intersection points of the current and voltage digital signals on the horizontal axis are determined in sequence, and whether they are the same is determined by the phase difference between the intersection points. When abnormal data is generated, the control feedback of the equipment is realized.

[0094] Among them, the feedback of current suppression operation is realized by predicting the data peak, the control feedback of the three-phase power of the equipment is realized by the imbalance of three-phase current and voltage, and the control feedback when an abnormality occurs is determined by analyzing the phase difference between the current and voltage digital signals. In this way, various energy-saving control operations are realized in combination, so that electrical appliances can achieve energy-saving operations with a greater possibility and significantly improve the efficiency of the useful energy of electrical appliances.

[0095] Example 2: The difference compared to Example 1 is that the present invention also discloses a device for improving the useful energy conversion rate of electrical appliances, including electrical equipment, a collection cabinet, a power-saving cabinet and a touch display screen. The power-saving cabinet realizes the regulation of useless energy in the circuit through built-in intelligent chip, power-saving algorithm processing, dI / dt suppression, and harmonic removal.

[0096] Example 3: The difference between Example 1 and Example 2 is that the same multiple 1.5KW air-conditioning compressors are used, and the traditional electrical control algorithm and the power-saving control algorithm of the present invention are used to implement the application operation of the equipment. Then, the operating efficiency, standby power consumption, and harmonic distortion rate are recorded. The results are shown in Table 1:

[0097] Table 1 Data record table

[0098]

[0099] In summary, after the power-saving control algorithm of the present invention is applied to the device, its operating efficiency is improved, and the standby power consumption and harmonic distortion rate are greatly reduced, thereby achieving better energy-saving management operations.

[0100] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0101] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0102] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A power-saving control algorithm for improving the useful energy conversion rate of electrical appliances, characterized by: include: S1. Intelligent sensing: The sensor array is used to collect the operating parameters and environmental parameters of the appliance, convert the collected analog signals into digital signals, transmit them to the data analysis step for processing, and store the data in the database; S2. Data Analysis: Build a data analysis model. Extract digital signals and introduce them into the data analysis model to first remove harmonics from the line. Then extract the peak threshold of historical data, compare it with the current data, and predict the peak value for analysis. Simultaneously, determine the balance of three-phase current and voltage, and analyze the phase difference between the current and voltage digital signals. Generate the analysis results and transmit them. S3, Strategy Generation: Based on the analysis results, the required adjustment strategy is formed and transmitted to the corresponding execution unit for control; S4. Data display: The analysis results and generated strategies are presented in the form of charts and text.

2. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 1, characterized in that: The operation of collecting the operating parameters and environmental parameters of the electrical appliance in S1 is as follows: Set the same collection time node to collect current, voltage and power data during the operation of the appliance; The internal and external temperature and humidity data of the appliance are collected, and the historical data thresholds are compared with the current collected data, and the control unit is used to control the environmental parameters; The data is classified, extracted and processed to form a table with positioning function.

3. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 2, characterized in that: The operation of forming a table with positioning function is as follows: The table uses the data categories to be collected as column titles and the timestamps corresponding to the collected time nodes as row titles. The square where the vertical position of the column title intersects the horizontal position of the row title is the result column. Then, the collected data text content is matched with the column and row headers of the table. After matching the same header content, the collected numerical results are filled into the result column; And realize the verification operation of the data in the result column, and realize the modification and compensation of the data.

4. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 1, characterized in that: The operation of establishing the data analysis model in S2 is: Establish a coordinate axis, with time as the horizontal axis and current data and voltage data as the vertical axis, starting from the starting point, and the horizontal axis and the vertical axis are perpendicular to each other; The nodes of the horizontal axis are determined with the same time period, and the nodes of the vertical axis are determined with the reasonable range values of the current data and voltage data, and the nodes are equidistant; The digital signal is then transmitted to the data analysis model to form a waveform diagram to implement the analysis operation.

5. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 1, characterized in that: The harmonic removal operation in the line implemented in S2 is: After the waveform data is introduced into the coordinate axis, the extended window is set to move on the waveform and the waveform curve segment is clarified; After the waveform curve is smoothed, an ideal sine waveform is introduced for comparison. Multiple comparison points are set in the vertical axis direction, and a ray is established along the horizontal direction of the horizontal axis. The first intersection with the waveform curve segment and the sine waveform is marked as reference point A. m and B m , compare the values of the reference points to determine the harmonic data that does not meet the requirements.

6. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 5, characterized in that: The operation of moving the extended window on the waveform graph and clarifying the curve segments of the waveform graph is as follows: Set the expansion window to F(u, v), where u refers to the length of the expansion window's border parallel to the horizontal axis, and v refers to the width of the expansion window's border parallel to the vertical axis. The expansion window moves by a distance of L each time, and the movement direction is to keep the lower left corner of the current expansion window moving to the intersection of the current expansion window and the waveform curve segment to achieve the next waveform curve segment acquisition; Based on F(u, v), each waveform curve segment image is expanded k times, and the expanded waveform curve segment is segmented, with the change point of each waveform curve segment change as the segmentation point. The change of the waveform curve segment is the change of the curve's amplitude, and the connection between adjacent segmentation points is realized; The midpoints of two adjacent line segments are extracted and connected to form the required line segment, and the midpoint of the required line segment is set as the connection point. Then, the connection points are connected in sequence through smooth curves in the order of time nodes to form a new waveform curve segment, and the starting point and end point of the new waveform curve segment are consistent with the starting point and end point of the historical waveform curve segment.

7. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 5, characterized in that: The operation of comparing the values of the reference points to determine the harmonic data that does not meet the requirements is: Based on reference point A m and B m , extract the values corresponding to the horizontal axis positions as X cm and X dm , and X cm Indicates that the horizontal axis value corresponding to the mth reference point A is X c , X dm Indicates that the horizontal axis value corresponding to the mth reference point B is X d ; By comparing X from the first reference point to the mth reference point cm and X dm The value between the two sets is set to [e1, e2], and there is , the waveform curve segment at the current reference point does not meet the requirements.

8. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 1, characterized in that: The operation of extracting the peak threshold of historical data in S2, comparing it with the current data and predicting the peak value for analysis is as follows: By extracting the optimized current waveform curve, determining the periodic curve segment of the current waveform curve; The intersection of the current waveform curve and the horizontal axis is determined at the horizontal axis, and the first periodic curve segment is from the second intersection point to the fourth intersection point, and the adjacent equidistant periodic curve segments after the fourth intersection point are extracted in sequence to achieve coverage comparison of adjacent periodic curve segments, and the periodic curve segments with the same number of coverage times are normal periodic curve segments; The peak value of the normal cycle curve segment is extracted, and the peak value of the normal cycle curve segment is compared with the historical data peak value threshold. If the peak value of the normal cycle curve segment exceeds the threshold, it is predicted that a current suppression operation is required.

9. The power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to claim 1, characterized in that: The operation of determining the balance of three-phase current and voltage in S2 is: The voltage data of phase A, phase B and phase C are extracted and formed into voltage waveform curve segments; Then, judgment nodes are set at equal intervals on the horizontal axis to determine whether the values of the waveform curve segments of phases A, B, and C on the vertical axis are equal. If they are not equal, an unbalanced feedback of the three-phase current and voltage is formed; The operation of S2 for analyzing the phase difference between the current and voltage digital signals is as follows: By extracting the current waveform curve, determining the periodic curve segment of the current waveform curve; Then, the voltage waveform curve of the current electrical appliance in the same time period is introduced, and the voltage waveform curve is introduced into the coordinate axis to realize comparison with the current waveform curve; The intersection points of the current and voltage digital signals on the horizontal axis are determined in sequence, and whether they are the same is determined by the phase difference between the intersection points. When abnormal data is generated, the control feedback of the equipment is realized.

10. A device for improving the useful energy conversion rate of an electrical appliance, implemented by using the power-saving control algorithm for improving the useful energy conversion rate of an electrical appliance according to any one of claims 1 to 9, characterized in that: It includes electrical equipment, collection cabinets, power-saving cabinets and touch screens. The power-saving cabinets regulate useless energy in the line through built-in intelligent chips, power-saving algorithm processing, dI / dt suppression and harmonic removal.

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