Direct-current electric energy tracing method, system and equipment considering dynamic characteristics

Abstract

The invention discloses a direct current electric energy traceability method, system and device considering dynamic characteristics, and relates to the technical field of electric energy metering traceability. The technical key points are as follows: a direct-current electric energy meter uploads electricity consumption data and identification information of electricity consumption each time to a server; the server associates and stores the metering date, the metering starting time, the metering ending time, the load information, the direct current electricity consumption and the alternating current electricity consumption included in the electricity consumption data with the identification information, and counts the total electricity consumption of the metering date; the direct-current electric energy meter receives query information for querying historical electricity consumption, generates a query request according to the query information and sends the query request to the server; and the server queries the power consumption data according to the query request and sends a query result to the queried direct current electric energy meter. The direct-current electricity consumption and the alternating-current electricity consumption are respectively subjected to time dynamic measurement, so that accurate and rapid source tracing of data of the direct-current electric energy meter is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy metering traceability, and in particular to a direct current electric energy traceability method, system and device taking into account dynamic characteristics. Background Art

[0002] DC energy meters are widely used in DC panels, solar power supply, electric vehicle charging, telecommunication base stations, subways and other places that require DC power. The metering data of the energy meter is the basis for charging electricity fees, so the energy meter must have upward traceability.

[0003] For DC loads, the applied DC power can be transformed by a DC / DC converter or rectified by AC power. However, when the voltage is transformed by a DC / DC converter (for example, charging an electric car), there is still reactive power flowing between the rechargeable battery and the power supply. When AC power is rectified into DC, although the DC grid has been filtered, its voltage still contains a lot of harmonics, resulting in the metering data of the existing energy meter not being the actual power consumption data of the load.

[0004] Therefore, in the presence of the above-mentioned "noise", how to accurately trace the source of DC power consumption is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The present invention provides a direct current electric energy source tracing method, system and device taking into account dynamic characteristics, so as to solve the problem of how to accurately measure and trace the source of a direct current electric energy meter under "clutter" conditions.

[0006] The present invention is achieved through the following technical solutions:

[0007] A first aspect of the present invention provides a method for tracing the source of direct current power taking into account dynamic characteristics, comprising:

[0008] Measuring the electricity consumption data of each electricity consumption of the DC electric energy meter, the electricity consumption data includes the measurement date, measurement start time, measurement end time, load information, DC power consumption and AC power consumption; wherein,

[0009] The DC power consumption is obtained by accumulating the instantaneous power of the DC power meter over time, and the AC power consumption is obtained by accumulating the AC power of the DC power meter over time;

[0010] Uploading the power consumption data and identification information of the DC power meter to a server;

[0011] Receiving query information for querying historical power consumption, generating a query request according to the query information and sending the query request to the server;

[0012] Receive the query result returned by the server according to the query request, and display the query result.

[0013] The present invention measures the power consumption data of the DC energy meter each time and uploads it to the server for storage and management, and can trace the data through any DC energy meter. The DC power consumption and AC power consumption are dynamically measured over time, the metering data is accurate, the DC power consumption is used as the billing basis, the cost is reasonable, and the DC energy meter data is accurately and quickly traced.

[0014] Furthermore, the instantaneous power of the DC electric energy meter is obtained in the following manner:

[0015] Using a voltage sensor to collect the voltage signal of the DC energy meter to obtain a first voltage signal U1, and passing the first voltage signal through a first DC blocking capacitor to obtain a second voltage signal U2;

[0016] Using a current sensor to collect the current signal of the DC energy meter to obtain a first current signal I1, and passing the first current signal through a second DC blocking capacitor to obtain a second current signal I2;

[0017] Calculate instantaneous power: P t =U1 I1-U1 I2-U2 I 1+ U2 I2; where P t Represents the instantaneous power at time t. U1 and U2 both use the voltage signal at time t, and I1 and I2 both use the current signal at time t.

[0018] Furthermore, the AC power of the DC energy meter is calculated as: P' t =U2 I1+U1 I2; where P' t It represents the AC power at time t. U1 and U2 use the voltage signal at time t, and I1 and I2 use the current signal at time t.

[0019] Furthermore, the method also includes issuing a warning message if the AC power consumption exceeds a threshold.

[0020] Further, the query information includes one or more of date query information, time query information and load query information;

[0021] The date query information is used to query the DC power consumption and / or AC power consumption on the corresponding measurement date;

[0022] The time query information is used to query the DC power consumption and / or AC power consumption between the corresponding metering start time and metering end time;

[0023] The load query information is used to query the DC power consumption and / or AC power consumption of the corresponding load.

[0024] Furthermore, the time query information includes a query period and a query time;

[0025] When the user inputs a query period, the query results include DC power consumption and / or AC power consumption whose metering start time and metering end time are both within the query period;

[0026] When the user inputs a query time, the query result includes the DC power consumption and / or AC power consumption between the metering start time and the metering end time including the query time.

[0027] Furthermore, the electricity consumption data of each electricity consumption of the DC electric energy meter includes:

[0028] Detect the current in the circuit. When it is detected that there is current in the circuit, start measuring the power consumption and record the start time of measurement. When it is detected that there is no current in the circuit, end the measurement and record the end time of measurement and the power consumption this time.

[0029] A second aspect of the present invention provides a method for tracing the source of direct current power taking into account dynamic characteristics, comprising:

[0030] Receive power consumption data and identification information sent by a DC power meter, associate and store the measurement date, measurement start time, measurement end time, load information, DC power consumption and AC power consumption included in the power consumption data with the identification information, and count the total power consumption on the measurement date;

[0031] A query request from a DC electric energy meter is received, power consumption data is queried according to the query request, and the query result is sent to the queried DC electric energy meter.

[0032] A third aspect of the present invention provides a DC power source tracing system taking into account dynamic characteristics, comprising: a DC power meter, a server, and a communication module for establishing communication between the DC power meter and the server;

[0033] The DC energy meter uploads the power consumption data and identification information of each power consumption to the server;

[0034] The server associates and stores the metering date, metering start time, metering end time, load information, DC power consumption and AC power consumption included in the power consumption data with the identification information, and counts the total power consumption on the metering date; wherein,

[0035] The DC power consumption is obtained by accumulating the instantaneous power of the DC power meter over time, and the AC power consumption is obtained by accumulating the AC power of the DC power meter over time;

[0036] The DC electric energy meter receives query information for querying historical power consumption, generates a query request according to the query information, and sends the query request to the server;

[0037] The server queries the power consumption data according to the query request, and sends the query result to the queried DC power meter.

[0038] A fourth aspect of the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the DC power tracing method taking into account dynamic characteristics as described in any one of the first aspects of the present invention.

[0039] Compared with the prior art, the present invention has the following advantages and beneficial effects

[0040] By measuring DC power consumption and AC power consumption separately, the influence of AC components such as reactive power and harmonics on electricity billing is eliminated, making the measurement accurate and the cost calculation reasonable. Taking into account the dynamic characteristics, the instantaneous power and AC power are accumulated over the metering time to obtain accurate metering data.

[0041] The reactive power and harmonic AC power consumption are measured as the status monitoring data of the power meter, and the operating status of the power meter can also be monitored.

[0042] The electricity consumption data of each measurement, including the measurement date, measurement start time, measurement end time, load information, DC power consumption and AC power consumption, is uploaded to the server for unified management and storage. The server can be accessed through any DC energy meter to query the total power, load and time consumption data, so as to achieve precise and accurate traceability of electricity consumption data from the macro and micro levels. When querying electricity consumption data according to the query time, users do not need to remember the exact time and can quickly trace the source. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0044] Figure 1 is a flow chart of a direct current power source tracing method taking into account dynamic characteristics according to an embodiment of the present invention;

[0045] Figure 2 is a flow chart of another direct current power source tracing method taking into account dynamic characteristics according to an embodiment of the present invention;

[0046] Figure 3 It is an interactive flow chart of a DC power source tracing method taking into account dynamic characteristics according to an embodiment of the present invention;

[0047] Figure 4 The invention is a block diagram of a DC power source tracing system taking into account dynamic characteristics according to an embodiment of the invention. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0049] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to or inherent to other steps or units of the device.

[0050] The terms used in the various embodiments of the application are only used to describe the purpose of specific embodiments and are not intended to limit the various embodiments of the application. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as the meanings commonly understood by ordinary technicians in the field of the various embodiments of the application. The terms (such as the terms defined in the dictionary generally used) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in the various embodiments of the application.

[0051] Example 1

[0052] This embodiment provides a DC power source tracing method taking into account dynamic characteristics, which is applied to a DC power meter, such as Figure 1 Shown is a flow chart of a DC power source tracing method taking into account dynamic characteristics of this embodiment, which includes the following steps.

[0053] S1, measures the electricity consumption data of each electricity consumption by the DC energy meter.

[0054] The metered electricity consumption data includes metering date, metering start time, metering end time, load information, DC power consumption and AC power consumption.

[0055] Among them, the measurement date is a natural day, such as XX / XX / XX. The power consumption of the energy meter on each measurement date is recorded, and statistics and analysis can be performed on a single metering device or power consumption area. The metering start time, metering end time, and power consumption between the start time and the end time of this measurement exist in the form of a set of data pairs. The start time and the end time are recorded, and statistical analysis can be performed on single power consumption, power consumption period, and power consumption frequency. Load information refers to the equipment information of power-consuming equipment such as DC panels, electric vehicles, telecommunications base stations, and subways. It can be information such as equipment type, model, and factory identification that can distinguish different loads. Power consumption is the energy consumption measured by the energy meter once, that is, the energy consumption of the load between the start time and the end time of this measurement, including DC power consumption and AC power consumption.

[0056] In order to accurately measure the power consumption of the load, the power consumption measurement of the DC energy meter is divided into DC power consumption measurement and AC power consumption measurement to avoid the "clutter" of the energy meter affecting the accuracy of billing. At the same time, to avoid the influence of circuit voltage and current fluctuations on the accuracy of metering data, the instantaneous power is integrated over the metering time by taking into account dynamic characteristics, so as to obtain accurate metering data. That is, the DC power consumption is obtained by accumulating the instantaneous power of the DC energy meter over time, and the AC power consumption is obtained by accumulating the AC power of the DC energy meter over time.

[0057] S2, uploading the electricity consumption data and the identification information of the electricity meter to the server.

[0058] The energy meter uploads data immediately after a single measurement is completed, or it can temporarily store the power consumption data in the energy meter and set a fixed time to send it. Each time the power consumption data is uploaded, its own identification information is sent together with the power consumption data. The identification information of the energy meter is used to identify the identity of each energy meter, such as assigning an identity ID to each energy meter in advance, or using the factory parameters of the energy meter as its identity, which is convenient for tracing the source according to the energy meter and the server's management of multiple energy meters.

[0059] The server receives the electricity consumption data of multiple energy metering devices, associates and stores the metering data of each energy meter with its identification information, stores the start time, end time and power consumption of a single metering as a set of associated data, and counts the total power consumption of each metering device on each natural date, the total power consumption of each load and other statistical information, so that the corresponding data can be queried through the association relationship of historical data. By counting the total power consumption, the power consumption can be traced back to the source at a macro level. The server can be used for query and traceability of any energy meter, and through different statistical and query methods, it can achieve fine traceability of the total power consumption and the determined load as well as the determined power consumption time period.

[0060] S3, receiving query information for querying historical power consumption, generating a query request according to the query information and sending it to the server;

[0061] The electric energy meter receives the query information input by the user, generates a query request together with the query information and its identification information and sends it to the server. The server queries the corresponding power consumption data according to the query information carried in the query request and returns the query result to the electric energy meter that sent the information.

[0062] The electric energy meter is set with an interactive query entry for users to input query information, and the format of the query information can be preset, such as query by load information, query by electricity consumption date, query by electricity consumption time, etc.

[0063] The query information can be user input or automatically sent by the electricity meter according to the set program. For example, a fixed sending time is set to request the statistical results of its own electricity consumption data from the server to obtain statistical data such as total electricity consumption for one day, total electricity consumption for half a month, and electricity consumption time.

[0064] S4, receiving the query result returned by the server according to the query request, and displaying the query result.

[0065] Through the above steps, accurate and rapid traceability of DC meter data is achieved, and detailed traceability of total power, determined load or determined time period is achieved by inputting query information into the DC energy meter.

[0066] In one embodiment, the query information format preset by the DC power meter includes a date query format, a time query format, and a load query format. The date query format is such as "XX year XX month XX day", the time query format is such as "2:00pm-3:30pm", "XX year XX month XX day, 18:00pm-22:00pm", "XX year XX month XX day, 9:00am", and the load query format is such as "electric vehicle", "DC panel", "XX electric vehicle-XX (equipment model)".

[0067] The query information that can be input by the user includes one or more of date query information, time query information, and load query information.

[0068] When the date query information is input, the DC energy meter generates a query request with the date query information and its own identification information and sends it to the server. Since the server associates and stores each power consumption measurement with the measurement start time, measurement end time, measurement date, load information, and the identification information of the DC energy meter, the server can query the corresponding associated data according to the identification information and date query information in the query request, and return the query results such as the associated power consumption (DC power consumption, AC power consumption), measurement time (measurement start time, measurement end time), and load information to the DC energy meter for display.

[0069] Similarly, when the input information is time query information, the DC power meter generates a query request using the time query information and its own identification information and sends it to the server. The server queries the associated power consumption data based on the identification information and time query information in the query request, and returns the query results such as the associated power consumption, metering time, and load information to the DC power meter for display.

[0070] If the query information is "XX / XX / XX, 18:00pm-22:00pm", the power consumption data measured by the queried DC power meter during the time period of XX / XX / XX and 18:00pm-22:00pm will be returned, including a single power consumption data or the total power consumption, and may also include other data such as load information and metering time associated with the power consumption data.

[0071] If the query information is "XX year XX month XX day, 9:00am", the matching metering time (metering start time to metering end time) includes the electricity consumption data at XX year XX month XX day, 9:00am. By querying according to time, users do not need to remember the exact electricity consumption time, and can quickly trace the source.

[0072] The user can also input only the load query information, and the server will query the power consumption data of the corresponding load according to the load information, and query the power consumption data of the load in the power consumption data of the DC power meter with the ID according to the DC power meter's ID and load information. Or the user can input the comprehensive query information of "date query information / time query information+load query information", and the server will query the power consumption data of the DC power meter with the ID corresponding to the load at the date / time.

[0073] The queried power consumption includes two items: DC power consumption and AC power consumption, and may also include the total power consumption of DC and AC. When the server returns the query result, it may return at least one of the DC power consumption, AC power consumption, and the total power consumption of DC and AC according to the query type.

[0074] In one embodiment, the service life of the electric energy meter is improved by detecting the current in the circuit to start / end measurement. When no current flows in the circuit, the electric energy meter is in a dormant state. When current flows in the circuit, the electric energy meter is awakened and starts measuring, and records the time when the measurement starts. When no current flows in the circuit again, the measurement ends, and the end time of the measurement and the current power consumption are recorded.

[0075] In one embodiment, in order to accurately measure the DC power consumption and AC power consumption, a voltage sensor is used to collect the voltage signal of the DC power meter as the first voltage signal U1, and the AC component of the first voltage signal U1 is obtained through a first DC blocking capacitor as the second voltage signal U2. A current sensor is used to collect the current signal of the DC power meter as the first current signal I1, and the AC component of the first current signal I1 is obtained through a second DC blocking capacitor as the second current signal I2.

[0076] The product of the first voltage signal U1 and the first current signal I1 is subtracted from the product of the first voltage signal U1 and the second current signal I2, and then the product of the second voltage signal U2 and the first current signal I1 is subtracted, and finally the product of the second voltage signal U2 and the second current signal I2 is added to obtain the instantaneous power.

[0077] The AC power is obtained by summing the product of the second voltage signal U2 and the first current signal I1 and the product of the first voltage signal U1 and the second current signal I2.

[0078] The expression of instantaneous power is:

[0079] P t =U1 I1-U1 I2-U2 I 1+ U2I2

[0080] The expression of AC power is:

[0081] P' t =U2 I1+U1 I2

[0082] In the above two formulas, P t represents the instantaneous power at time t, P' t Represents the AC power at time t. U1 and U2 both use the voltage signal at time t, and I1 and I2 both use the current signal at time t.

[0083] The instantaneous power and AC power are accumulated over time during the measurement period to obtain the actual DC power consumption and the actual AC power consumption during each measurement period.

[0084] In view of the dynamic change characteristics of the power grid, the present invention completely screens out reactive power and harmonics when measuring DC power consumption, and measures AC power consumption generated by reactive power and harmonics when measuring AC power consumption, thereby improving the accuracy of measurement.

[0085] Furthermore, if the AC power consumption exceeds a threshold, a warning message is sent to a controller of the DC power meter.

[0086] Example 2

[0087] This embodiment provides a DC power source tracing method taking into account dynamic characteristics, which is applied to a server, such as Figure 2 The flowchart of the DC power source tracing method taking into account dynamic characteristics shown in the figure includes:

[0088] S2-1, receiving the power consumption data and identification information sent by the DC power meter, associating and storing the metering date, metering start time, metering end time, load information, DC power consumption and AC power consumption included in the power consumption data with the identification information, and counting the total power consumption on the metering date.

[0089] S3-1, receiving a query request from a DC energy meter, querying power consumption data according to the query request, and sending the query result to the queried DC energy meter.

[0090] The server receives the electricity consumption data of multiple energy metering devices, associates and stores the metering data of each energy meter with its identification information, stores the start time, end time and power consumption of a single metering as a set of associated data, and counts the total power consumption of each metering device on each natural date, the total power consumption of each load and other statistical information, so that the corresponding data can be queried through the association relationship of historical data. It can be used for query and traceability of any energy metering device, and through different statistical and query methods, it can achieve fine traceability of total power, determined loads, and determined power consumption time periods.

[0091] The server receives a query request from any DC energy meter, and queries the corresponding power consumption data according to the query information and identification information carried in the query request. The query information includes one or more of date query information, time query information, and load query information.

[0092] When the query information includes date query information, the server searches the stored power consumption data for power consumption data associated with the identification information and whose metering date is equal to the query date, and sends the query result to the queried DC power meter. When receiving the uploaded data, the server stores the identification information of all DC power meters, so the query result can be sent to the corresponding query device according to the identification information.

[0093] When the query information includes time query information, the server searches the stored power consumption data for power consumption data associated with the identification information and whose metering time is within the query time period, and sends the query result to the queried DC power meter. For example, if the power meter identification is "001", and the query time is "October 01, 24, 18:00pm-22:00pm", the power consumption data 1 (October 01, 24, 18:20pm-20:53pm, DC power consumption P1, AC power consumption Q1, load 1, identification 001) and power consumption data 2 (October 01, 24, 20:20pm-21:30pm, DC power consumption, AC power consumption, load 3, identification 001) that meet the conditions are queried, and the power consumption data 1 and power consumption data 2 are sent to the DC power meter 001.

[0094] When the query information includes load query information, the server queries the stored power consumption data for the power consumption data corresponding to the load and associated with the identification information, and sends the query result to the queried DC power meter.

[0095] Example 3

[0096] This embodiment provides a DC power source tracing system taking into account dynamic characteristics, such as Figure 3 , Figure 4 As shown, the system includes a DC power meter, a server, and a communication module for establishing communication between the DC power meter and the server. The system is used to execute the DC power source tracing method taking into account dynamic characteristics in Embodiment 1 and Embodiment 2, including the following interactive process:

[0097] The DC energy meter uploads the power consumption data and identification information of each power consumption to the server;

[0098] The server associates and stores the measurement date, measurement start time, measurement end time, load information, DC power consumption and AC power consumption included in the power consumption data with the identification information, and counts the total power consumption on the measurement date;

[0099] The DC energy meter receives the query information for querying the historical power consumption, generates a query request according to the query information and sends it to the server;

[0100] The server queries the power consumption data according to the query request and sends the query result to the queried DC power meter.

[0101] Among them, the DC electric energy meter accumulates and measures its instantaneous power over time to obtain the DC power consumption, and accumulates and measures its AC power over time to obtain the AC power consumption.

[0102] Example 4

[0103] This embodiment provides an electronic device, which includes a processor, a memory, and a communication device. The number of processors in the electronic device can be one or more, and the processor, the memory, and the communication device can be connected via a bus or other means.

[0104] The memory is a computer-readable storage medium that can be used to store software programs, computer executable programs, and modules. The processor executes various functional applications and data processing of the electronic device by running the software programs, instructions, and modules stored in the memory to implement the method of Embodiment 1 or Embodiment 2 of the present invention.

[0105] The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0106] Example 5

[0107] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the method of Embodiment 1 or Embodiment 2 of the present invention is implemented. The storage medium may be a ROM / RAM, a magnetic disk, an optical disk, or the like.

[0108] Example 6

[0109] This embodiment provides a computer program product. When the computer program product runs on a computer, it enables the computer to execute the method of Embodiment 1 or Embodiment 2 of the present invention.

[0110] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A DC power source tracing method taking into account dynamic characteristics, characterized in that: The method comprises: Measuring the electricity consumption data of each electricity consumption of the DC electric energy meter, the electricity consumption data includes the measurement date, measurement start time, measurement end time, load information, DC power consumption and AC power consumption; wherein, The DC power consumption is obtained by accumulating the instantaneous power of the DC power meter over time, and the AC power consumption is obtained by accumulating the AC power of the DC power meter over time; Uploading the power consumption data and identification information of the DC power meter to a server; Receiving query information for querying historical power consumption, generating a query request according to the query information and sending the query request to the server; Receive the query result returned by the server according to the query request, and display the query result.

2. The DC power source tracing method taking into account dynamic characteristics according to claim 1 is characterized in that: The instantaneous power of the DC energy meter is obtained as follows: Using a voltage sensor to collect the voltage signal of the DC energy meter to obtain a first voltage signal U1, and passing the first voltage signal through a first DC blocking capacitor to obtain a second voltage signal U2; Using a current sensor to collect the current signal of the DC energy meter to obtain a first current signal I1, and passing the first current signal through a second DC blocking capacitor to obtain a second current signal I2; Calculate instantaneous power: P t =U1 I1-U1 I2-U2 I 1+ U2 I2; Among them, P t It represents the instantaneous power at time t. U1 and U2 use the voltage signal at time t, and I1 and I2 use the current signal at time t.

3. The DC power source tracing method taking into account dynamic characteristics according to claim 2 is characterized in that: The AC power of the DC energy meter is calculated as: P' t =U2 I1+U1 I2; Among them, P' t It represents the AC power at time t. U1 and U2 use the voltage signal at time t, and I1 and I2 use the current signal at time t.

4. The DC power source tracing method taking into account dynamic characteristics according to claim 1, characterized in that: The method further includes issuing a warning message if the AC power consumption exceeds a threshold.

5. The DC power source tracing method taking into account dynamic characteristics according to claim 1, characterized in that: The query information includes one or more of date query information, time query information and load query information; The date query information is used to query the DC power consumption and / or AC power consumption on the corresponding measurement date; The time query information is used to query the DC power consumption and / or AC power consumption between the corresponding metering start time and metering end time; The load query information is used to query the DC power consumption and / or AC power consumption of the corresponding load.

6. The DC power source tracing method taking into account dynamic characteristics according to claim 5, characterized in that: The time query information includes the query period and the query time; When the user inputs a query period, the query results include DC power consumption and / or AC power consumption whose metering start time and metering end time are both within the query period; When the user inputs a query time, the query result includes the DC power consumption and / or AC power consumption between the metering start time and the metering end time including the query time.

7. The DC power source tracing method taking into account dynamic characteristics according to claim 1, characterized in that: The electricity consumption data of each electricity consumption of the DC electric energy meter includes: Detect the current in the circuit. When it is detected that there is current in the circuit, start measuring the power consumption and record the start time of measurement. When it is detected that there is no current in the circuit, end the measurement and record the end time of measurement and the power consumption this time.

8. A DC power source tracing method taking into account dynamic characteristics, characterized in that: include: Receive power consumption data and identification information sent by a DC power meter, associate and store the measurement date, measurement start time, measurement end time, load information, DC power consumption and AC power consumption included in the power consumption data with the identification information, and count the total power consumption on the measurement date; A query request from a DC electric energy meter is received, power consumption data is queried according to the query request, and the query result is sent to the queried DC electric energy meter.

9. A DC power source tracing system taking into account dynamic characteristics, characterized in that: include: A direct current electric energy meter, a server, and a communication module for establishing communication between the direct current electric energy meter and the server; The DC energy meter uploads the power consumption data and identification information of each power consumption to the server; The server associates and stores the metering date, metering start time, metering end time, load information, DC power consumption and AC power consumption included in the power consumption data with the identification information, and counts the total power consumption on the metering date; wherein, The DC power consumption is obtained by accumulating the instantaneous power of the DC power meter over time, and the AC power consumption is obtained by accumulating the AC power of the DC power meter over time; The DC electric energy meter receives query information for querying historical power consumption, generates a query request according to the query information, and sends the query request to the server; The server queries the power consumption data according to the query request, and sends the query result to the queried DC power meter.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the direct current power tracing method taking into account dynamic characteristics as described in any one of claims 1-7 is implemented.

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