Distributed power generation multi-user green electricity tracing method and system based on consumption decomposition

Abstract

This invention discloses a method and system for tracing green electricity sources for distributed generation based on absorption decomposition, belonging to the field of green power technology. The method determines the state of the medium-voltage and low-voltage distribution sections based on the real-time power at the junction meters. Utilizing Kirchhoff's first law, and based on the states of the medium-voltage and low-voltage distribution sections, as well as the electrical parameters of the medium-voltage and low-voltage distribution sections, generation terminals, and consumption terminals, it calculates and determines the total electricity consumption, total generation, and total absorption of the medium-voltage distribution section; the total grid supply, total absorption within the section, and total absorption outside the section for the low-voltage distribution section; and the grid supply, absorption within the section, and absorption outside the section for the consumption terminals. This achieves absorption decomposition of electricity within the medium-voltage regional power grid, solving the technical problem that existing methods cannot perform absorption decomposition of electricity within the medium-voltage regional power grid under distributed hybrid network conditions.

Description

Technical Field

[0001] This invention relates to the field of green power technology, and in particular to a method and system for tracing the source of green electricity from distributed generation to multiple users based on absorption and decomposition. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Within a medium-voltage regional power grid, the grid connection point is located in a medium-voltage distribution section. Below the medium-voltage distribution section, there are multiple low-voltage transformers. When each transformer's low-voltage distribution section has multiple distributed generation terminals and multiple power consumption terminals, each terminal user's electricity load may come from photovoltaic power generation within the low-voltage distribution section below this transformer, photovoltaic power generation within the low-voltage distribution sections below other transformers, or power supply from the external national grid. Since each power consumption terminal only has one electricity meter, it is impossible to obtain the grid power supply, the electricity consumption within the section, and the electricity consumption outside the section for each power consumption terminal through direct measurement.

[0004] In related technologies, regional green electricity source tracing and accounting are performed using active power distribution matrices and nodal load active power distribution matrices. However, this method can only calculate the proportion of green electricity and non-green electricity, and cannot further calculate the proportion of green electricity derived from the power and electricity consumed within the same transformer section and the power and electricity consumed outside the section by other transformers outside the section. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a method and system for tracing the source of green electricity from distributed generation to multiple users based on absorption decomposition. This method can calculate the grid power consumption, intra-segment absorption power consumption, and extra-segment absorption power consumption for each power terminal, each low-voltage distribution segment, and the entire medium-voltage distribution segment through the absorption decomposition algorithm.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Firstly, a multi-user green electricity source tracing method for distributed generation based on absorption decomposition is proposed, including:

[0008] Obtain the real-time power, total grid power supply and total grid-connected power of the metering in the medium-voltage distribution section, the real-time power, total grid-connected power and positive active power displayed on the metering in the low-voltage distribution section, the power generation and power generation of the power generation terminal, and the power consumption and power consumption of the power consumption terminal.

[0009] Based on the real-time power of the meter at the medium-voltage distribution section and the real-time power of the meter at the low-voltage distribution section, determine the status of the medium-voltage distribution section and the status of the low-voltage distribution section.

[0010] Using Kirchhoff's first law, and based on the states of the medium-voltage and low-voltage distribution sections, the real-time power, total grid supply, and total grid connection power of the medium-voltage distribution section, the real-time power, total grid connection power, and positive active power displayed on the meter of the low-voltage distribution section, the power generation and power generation of the generating terminals, and the power consumption and power consumption of the consumer terminals, the total power consumption, total power generation, and total power consumption of the medium-voltage distribution section, the total grid supply, total power consumption within the section, and total power consumption outside the section of the low-voltage distribution section, and the grid supply, power consumption within the section, and power consumption outside the section of the consumer terminals are calculated and determined.

[0011] Furthermore, when the real-time power of the meter at the medium-voltage distribution section is less than 0, the medium-voltage distribution section is determined to be in a power generation and grid connection state; when the real-time power of the meter at the medium-voltage distribution section is greater than 0, the medium-voltage distribution section is determined to be in an external power supply state.

[0012] When the real-time power of the meter at the low-voltage distribution section is less than 0, the low-voltage distribution section is determined to be in a power generation and grid connection state; when the real-time power of the meter at the low-voltage distribution section is greater than 0, the low-voltage distribution section is determined to be in an external power supply state.

[0013] Furthermore, the process of calculating and determining the total electricity consumption, total electricity generation, and total electricity absorption of the medium-voltage distribution section is as follows:

[0014] Calculate the sum of the generated electricity of all generating terminals within the medium-voltage distribution section to obtain the total generated electricity of the medium-voltage distribution section;

[0015] The total electricity consumption of the medium-voltage distribution section is calculated by subtracting the total electricity generated by the medium-voltage distribution section from the total electricity fed into the grid by the medium-voltage distribution section.

[0016] The total electricity consumption of the medium-voltage distribution section is calculated by adding the total grid power supply of the medium-voltage distribution section to the total electricity consumption of the medium-voltage distribution section.

[0017] Furthermore, the process of calculating and determining the total grid power supply, total power consumption within the low-voltage distribution section, and total power consumption outside the section includes:

[0018] Calculate the sum of the generated electricity of all generating terminals within the low-voltage distribution section to obtain the total generated electricity of the low-voltage distribution section;

[0019] Subtract the total grid-connected electricity of the low-voltage distribution section from the total electricity generated by the low-voltage distribution section to obtain the total electricity absorbed within the low-voltage distribution section.

[0020] Based on the real-time power of the meter at the low-voltage distribution section, the status of the low-voltage distribution section, the real-time power of the meter at the medium-voltage distribution section, and the status of the medium-voltage distribution section, the total power absorbed outside the low-voltage distribution section is calculated and determined.

[0021] The total external power consumption of the low-voltage distribution section is calculated and determined based on the total external power consumption of the low-voltage distribution section.

[0022] The total grid power supply of the low-voltage distribution section is obtained by subtracting the total off-site power consumption of the low-voltage distribution section from the positive active power displayed at the low-voltage distribution section gate meter.

[0023] Furthermore, the process of calculating and determining the total external absorption power of the low-voltage distribution section includes:

[0024] The actual power loss of the transformer in the low-voltage distribution section is calculated based on the real-time power of the meter at the low-voltage distribution section.

[0025] Based on the real-time power of the meter at the low-voltage distribution section, the actual power loss of the transformer in the low-voltage distribution section, the status of the low-voltage distribution section, the real-time power of the meter at the medium-voltage distribution section, and the status of the medium-voltage distribution section, calculate and determine the total external absorption power of the medium-voltage distribution section and the total external absorption distribution input of the low-voltage distribution section.

[0026] The total power absorbed outside the low-voltage distribution section is calculated based on the real-time power at the gate of the low-voltage distribution section, the actual power loss of the transformer in the low-voltage distribution section, the total power absorbed outside the medium-voltage distribution section, and the total input of the power absorbed outside the low-voltage distribution section.

[0027] Furthermore, the process of calculating and determining the grid-supplied electricity, intra-segment absorbed electricity, and inter-segment absorbed electricity for the electricity consumption terminal includes:

[0028] Calculate the sum of the electricity consumption of all electrical terminals within the low-voltage distribution section to obtain the total electricity consumption of the low-voltage distribution section;

[0029] Calculate the proportion of the electricity consumption of the power consumption terminal in the total electricity consumption of the low-voltage distribution section, and multiply this proportion by the total electricity consumption within the low-voltage distribution section to obtain the electricity consumption of the power consumption terminal within the section.

[0030] Calculate the proportion of the power consumption of the power terminal in the total power consumption of all power terminals under the low-voltage distribution section, and multiply this proportion by the total power absorption outside the low-voltage distribution section and the state of the low-voltage distribution section to obtain the power absorption outside the power terminal.

[0031] The external absorption capacity of the power consumption terminal is calculated and determined based on the external absorption capacity of the power consumption terminal.

[0032] Calculate the sum of the electricity consumption within the segment and the electricity consumption outside the segment of the electricity consumption terminal to obtain the total electricity consumption of the electricity consumption terminal;

[0033] The grid supply power of the power consumption terminal is calculated by subtracting the total electricity consumption of the power consumption terminal from the electricity consumption of the power consumption terminal.

[0034] Secondly, a distributed generation multi-user green electricity traceability system based on absorption and decomposition is proposed, including:

[0035] The electrical parameter acquisition unit is used to acquire the real-time power, total grid power supply and total grid power of the medium-voltage distribution section, the real-time power, total grid power and positive active power displayed on the low-voltage distribution section, the power generation and power generation of the power generation terminal, and the power consumption and power consumption of the power consumption terminal.

[0036] The distribution section status determination unit is used to determine the status of the medium-voltage distribution section and the low-voltage distribution section based on the real-time power of the meter at the medium-voltage distribution section and the real-time power of the meter at the low-voltage distribution section.

[0037] The absorption decomposition unit is used to calculate and determine the total energy consumption, total energy generation, and total energy absorption of the medium-voltage distribution section, the total grid-connected energy consumption, and total grid-connected energy consumption of the low-voltage distribution section, based on the state of the medium-voltage distribution section, the state of the low-voltage distribution section, the real-time power of the meter at the control point of the medium-voltage distribution section, the total grid-connected energy consumption, and the positive active energy consumption displayed at the control point of the low-voltage distribution section, the power generation and energy consumption of the power generation terminal, and the power consumption and energy consumption of the power consumption terminal.

[0038] Thirdly, a computer device is proposed, the device comprising:

[0039] A processor, adapted to execute computer programs;

[0040] A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the distributed generation multi-user green electricity traceability method based on absorption decomposition proposed in the first aspect.

[0041] Fourthly, a computer-readable storage medium is proposed, which stores a computer program adapted to be loaded and executed by a processor for the distributed generation multi-user green electricity traceability method based on absorption decomposition proposed in the first aspect.

[0042] Fifthly, a computer program product is proposed, which includes a computer program. When the computer program is executed by a processor, it implements the distributed generation multi-user green electricity traceability method based on absorption decomposition proposed in the first aspect.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] This invention proposes a method and system for tracing the source of distributed generation green electricity for multiple users based on absorption decomposition. The method determines the state of the medium-voltage distribution segment and the low-voltage distribution segment by using the real-time power of the meter at the medium-voltage distribution segment and the real-time power of the meter at the low-voltage distribution segment. Then, based on the state of the medium-voltage distribution segment and the low-voltage distribution segment, Kirchhoff's first law is used to calculate and determine the total electricity consumption, total electricity generation, and total absorption of the medium-voltage distribution segment; the total grid supply, total absorption within the segment, and total absorption outside the segment of the low-voltage distribution segment; and the grid supply, absorption within the segment, and absorption outside the segment of the electricity user terminal. This achieves the decomposition calculation of electricity consumption in the medium-voltage regional power grid.

[0045] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0046] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0047] Figure 1 This is a flowchart of the distributed generation multi-user green electricity source tracing method based on absorption decomposition proposed in this embodiment of the invention;

[0048] Figure 2 This is a hardware acquisition network diagram used in the distributed generation multi-user green electricity tracing method based on absorption decomposition proposed in this embodiment of the invention.

[0049] Figure 3 This is an architecture diagram of the distributed generation multi-user green electricity source tracing method based on absorption decomposition proposed in an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of the power supply network to which the distributed generation multi-user green electricity tracing method based on absorption decomposition proposed in this embodiment of the invention is applicable;

[0051] Figure 5 This is the high-voltage power distribution section energy decomposition process proposed in the embodiments of the present invention;

[0052] Figure 6 This is the low-voltage power distribution section energy decomposition process proposed in the embodiments of the present invention;

[0053] Figure 7 This is the user terminal electricity consumption decomposition process proposed in the embodiments of the present invention.

[0054] The components include: 1. Multifunctional electricity meter, 2. Gateway, 3. Fiber optic cable, 4. Switch, 5. Server, 6. Host computer, 7. Power supply interface, 8. Medium-voltage settlement point gate meter, 9. Low-voltage distribution section gate meter, 10. Power generation terminal, 11. Power consumption terminal, and 12. Transformer. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0056] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0057] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0058] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0059] The distributed generation multi-user green electricity traceability method based on absorption decomposition proposed in this invention embodiment is applied to, for example... Figure 4 In the medium-voltage regional power supply network shown, a medium-voltage settlement point meter 8 is installed at the 10kV medium-voltage cabinet at the lower end of the power supply interface 7. The medium-voltage settlement point meter 8 is used to obtain the real-time power of the medium-voltage distribution section. Total power supply Total electricity consumption ;in, ; ; and These are the displayed positive active energy and the displayed reverse active energy in Table 8 at the medium-voltage settlement point, respectively.

[0060] Multiple low-voltage distribution sections are set up under the medium-voltage distribution section. Each low-voltage distribution section is equipped with a transformer 12, and a low-voltage distribution section gate meter 9 is installed at the lower end of the transformer 12. The low-voltage distribution section gate meter 9 is used to obtain the real-time power of the low-voltage distribution section gate meter. Total electricity consumption and the positive active power displayed on the meter. ;in, ; and These are the displayed reverse active energy and displayed forward active energy in Table 9 at the low-voltage distribution section checkpoint, respectively.

[0061] Each low-voltage distribution section is also equipped with multiple power consumption terminals 11 and multiple power generation terminals 10. Each power generation terminal 10 and each power consumption terminal 11 is equipped with a multi-functional electricity meter 1. The multi-functional electricity meter 1 installed at the power generation terminal 10 is used to obtain the power generation and electricity consumption of the power generation terminal. The multi-functional electricity meter 1 installed at the 11 electricity terminals is used to obtain the power consumption and electricity consumption of the electricity terminals. .

[0062] like Figure 2 , Figure 3 As shown, the electrical parameters collected by the multi-functional electricity meter and each gateway meter are transmitted to the data acquisition software deployed in the server 5 through gateway 2, optical fiber 3 and switch 4. The server 5 decomposes the received power and electricity consumption to obtain the total power consumption, total power generation and total power consumption of the medium-voltage distribution section, the total grid power supply, total power consumption within the section and total power consumption outside the section of the low-voltage distribution section, and the grid power supply, power consumption within the section and power consumption outside the section of the power consumption terminal. The server 5 then presents the results calculated by the server 5 to the host computer 6.

[0063] The distributed generation multi-user green electricity tracing method based on absorption decomposition proposed in this invention uses a power absorption decomposition algorithm to calculate all power parameters of the medium-voltage settlement point table 8, low-voltage distribution section table 9, generation terminal 10, and consumption terminal 11 every 30 seconds, decomposing the corresponding external absorption power and integrating it. Simultaneously, all power-related parameters and external absorption electricity data are stored in a real-time database. Using an electricity absorption decomposition algorithm, all electricity data of the medium-voltage settlement point table 8, low-voltage distribution section table 9, generation terminal 10, and consumption terminal 11 are calculated every hour. The calculation results are first read from the data acquisition software and the real-time database, then the total electricity consumption, total generation electricity, and total absorption electricity of the entire medium-voltage distribution section, the total grid supply electricity and total internal absorption electricity of the low-voltage distribution section, and the grid supply electricity and internal absorption electricity of the consumption terminal are calculated. Statistics are performed on an hourly, daily, monthly, and yearly basis, and the results are stored in a relational database.

[0064] The distributed generation multi-user green electricity tracing method based on absorption decomposition proposed in this invention uses Kirchhoff's first law and the nodal current balance theory as the main physical principle of the absorption decomposition algorithm. It treats both the medium-voltage settlement point meter 8 and the low-voltage distribution section meter 9 as nodes, ensuring that the energy flowing into and out of each node is equal. Real-time calculations and periodic meter readings are performed on the power and energy consumption of each node. Mathematical algorithms are used to achieve the absorption decomposition calculation of power and energy consumption. The computer's cyclic computing capability is used to reverse-calculate the low-voltage distribution section meter 9 node from the power user terminal 11, then reverse-calculate the medium-voltage settlement point meter 8 node to obtain the external absorption power. Finally, the low-voltage distribution section meter 9 node and the power user terminal 11 are calculated forward, thus enabling the entire system to operate.

[0065] like Figure 1 As shown in the embodiments of the present invention, the distributed generation multi-user green electricity source tracing method based on absorption decomposition includes:

[0066] Obtain the real-time power of the gate meter in the medium-voltage power distribution section Total power supply Total electricity consumption Real-time power at the gate of the low-voltage distribution section Total electricity consumption and the positive active power displayed on the meter. The power generation capacity and electricity generation of the power generation terminal and the power consumption of the power terminal. and power consumption ;

[0067] Based on the real-time power of the meter at the medium-voltage distribution section and the real-time power of the meter at the low-voltage distribution section, determine the status of the medium-voltage distribution section and the status of the low-voltage distribution section.

[0068] Using Kirchhoff's first law, based on the states of the medium-voltage and low-voltage distribution sections, the real-time power, total grid power supply, and total grid-connected power of the medium-voltage distribution section, and the real-time power and total grid-connected power of the low-voltage distribution section's meters... The total active power displayed on the meter is positive. The power generation and electricity consumption of the power generation terminal, and the power consumption and electricity consumption of the power consumption terminal are calculated to determine the total electricity consumption, total power generation and total electricity consumption of the medium-voltage distribution section, the total grid power supply, total electricity consumption within the section and total electricity consumption outside the section of the low-voltage distribution section, and the grid power supply, electricity consumption within the section and electricity consumption outside the section of the power consumption terminal.

[0069] The absorption factor is used to characterize the state of each distribution segment.

[0070] When the real-time power of the meter at the medium-voltage distribution section is less than 0, the medium-voltage distribution section is determined to be in the state of generating electricity and connecting to the grid; when the real-time power of the meter at the medium-voltage distribution section is greater than 0, the medium-voltage distribution section is determined to be in the state of external power supply.

[0071] When the real-time power of the meter at the low-voltage distribution section is less than 0, the low-voltage distribution section is determined to be in a power generation and grid connection state; when the real-time power of the meter at the low-voltage distribution section is greater than 0, the low-voltage distribution section is determined to be in an external power supply state.

[0072] The concept of the absorption factor δ is introduced to distinguish whether a corresponding distribution segment is in a state of generating electricity and connecting to the grid or in a state of external power supply. This relies on the real-time power meter at the gate of the medium-voltage distribution segment. Real-time power at the junction of low-voltage distribution sections The calculation is performed using the following formula:

[0073] Positive absorption factor of low-voltage distribution section : ;

[0074] Inverse absorption factor of low-voltage distribution section : .

[0075] For example:

[0076] like If the low-voltage distribution section where transformer #1 is located is in an external power supply state, all the power generated by the power generation terminal within the section is consumed, and power still needs to be supplied from outside the section. However, the power supplied from outside the section may come from the power grid or from the power generation terminal of other distribution sections.

[0077] like If the low-voltage distribution section where transformer #1 is located is in a state of generating electricity and connecting to the grid, the power generated by the power generation terminal within the section is not fully absorbed, and some of the power is fed back to outside the section.

[0078] Positive absorption factor of medium voltage distribution section : ;

[0079] Inverse absorption factor of medium voltage distribution section : .

[0080] In some embodiments, such as Figure 5 As shown, the process of calculating and determining the total electricity consumption, total electricity generation, and total electricity absorption of a medium-voltage distribution section is as follows:

[0081] The total electricity generation of the medium-voltage distribution section is obtained by summing the electricity generated by all generating terminals within the medium-voltage distribution section. ;

[0082] ;

[0083] In the formula, n represents the number of generating terminals in the i-th low-voltage distribution segment. This refers to the number of low-voltage distribution sections within the medium-voltage distribution section. Let be the power generation of the generation terminal s in the i-th low-voltage distribution section of the medium-voltage distribution section.

[0084] The total power generation of the medium-voltage distribution section Subtract the total grid-connected electricity from the medium-voltage distribution section The total electricity consumption of the medium-voltage distribution section is calculated. ;

[0085] ;

[0086] The total grid power supply of the medium voltage distribution section Total electricity consumption including medium-voltage distribution sections The total power consumption of the medium-voltage distribution section was calculated. .

[0087] .

[0088] Based on this, the green electricity rate of the medium-voltage distribution section was also calculated. :

[0089] .

[0090] In some embodiments, such as Figure 6 As shown, the total grid power supply of the low-voltage distribution section is calculated and determined. Total electricity consumption within the section and the total electricity consumption outside the section The process includes:

[0091] The total power generation of the low-voltage distribution section is obtained by summing the power generation of all generating terminals within the low-voltage distribution section. ;

[0092] ；

[0093] The total power generation of the low-voltage distribution section Subtract the total grid-connected electricity from the low-voltage distribution section To obtain the total electricity consumption within the low-voltage distribution section ;

[0094] ;

[0095] Based on the real-time power at the gate of the low-voltage distribution section, the current status of the low-voltage distribution section, the real-time power at the gate of the medium-voltage distribution section, and the current status of the medium-voltage distribution section, the total external power absorption capacity of the low-voltage distribution section is calculated and determined. ;

[0096] Based on the total power absorption capacity outside the low-voltage distribution section Calculate and determine the total external power consumption of the low-voltage distribution section. ;

[0097] ;

[0098] In the formula, t represents time.

[0099] The meter will display positive active power. Subtract the total electricity consumption outside the low-voltage distribution section Obtain the total grid power supply of the low-voltage distribution section ;

[0100] .

[0101] Based on this, the total electricity consumption of the low-voltage distribution section was also calculated. and the green electricity rate of low-voltage distribution sections ;

[0102] ;

[0103] .

[0104] Among them, the total power absorption capacity outside the low-voltage distribution section is calculated and determined. The process includes:

[0105] According to the real-time power of the low-voltage distribution section's gate meter Calculate and determine the actual power loss of transformers in low-voltage distribution sections. ;

[0106] ;

[0107] In the formula, The no-load loss of the transformer at the upper end of Table 9 at the low-voltage distribution section gate;

[0108] The load loss of the transformer at the upper end of Table 9 at the low-voltage distribution section gate;

[0109] This refers to the power factor of the distribution section under Table 9 at the low-voltage distribution section checkpoint.

[0110] According to the real-time power of the low-voltage distribution section's gate meter Actual power loss of transformers in low-voltage distribution sections Status of low-voltage distribution sections and real-time power at the control points of medium-voltage distribution sections. Based on the status of the medium-voltage distribution section, calculate and determine the total external power absorption capacity of the medium-voltage distribution section. and the total input of the low-voltage distribution section's external absorption and distribution ;

[0111] ;

[0112] ;

[0113] According to the real-time power of the low-voltage distribution section's gate meter Actual power loss of transformers in low-voltage distribution sections Total external power consumption of medium-voltage distribution sections and the total input of the low-voltage distribution section's external absorption and distribution Calculate and determine the total power absorption capacity outside the low-voltage distribution section. ;

[0114] .

[0115] In some embodiments, such as Figure 7 As shown, the grid power supply of the electricity terminal is calculated and determined. Electricity consumption within the section and external power consumption The process includes:

[0116] Calculate the sum of the power consumption of all electrical terminals within the low-voltage distribution section to obtain the total power consumption of the low-voltage distribution section. ;

[0117] ;

[0118] In the formula, This represents the power consumption of terminal j in the i-th low-voltage distribution section within the medium-voltage distribution section.

[0119] Calculate the total electricity consumption of the power consumption terminal in the low-voltage distribution section. The percentage of the total electricity consumed within the low-voltage distribution section is multiplied by this percentage. Obtain the electricity consumption within the segment of the power consumption terminal. ;

[0120] ;

[0121] Calculate the power consumption of the electrical terminal. Total power consumption of all electrical terminals under low-voltage distribution section The percentage of the total power absorbed outside the low-voltage distribution section is multiplied by this percentage. Based on the status of the low-voltage distribution section, obtain the off-site power absorption capacity of the power consumption terminal. ;

[0122] ;

[0123] ;

[0124] In the formula, Let be the power consumption of terminal j in the i-th low-voltage distribution section of the medium-voltage distribution section.

[0125] According to the power absorption capacity outside the power consumption terminal Calculate and determine the external power consumption of the power consumption terminal. ;

[0126] ;

[0127] Calculate the electricity consumption within the segment of the power consumption terminal. and the external consumption of electricity at the power consumption terminal The sum of these amounts yields the total electricity consumption of the power-consuming terminals. ;

[0128] ;

[0129] Electricity consumption of power-consuming terminals Subtract the total electricity consumption of the power consumption terminal Calculate and determine the grid power supply of the power consumption terminal. ;

[0130] .

[0131] Based on this, the green electricity rate of the electricity consumption terminals was also calculated. ;

[0132] .

[0133] This invention calculates electricity consumption data every hour, performing meter readings daily, monthly, and yearly at regular intervals, thereby determining the electricity consumption data for each day, month, and year.

[0134] Before calculating various energy consumption data such as the total energy consumption, total energy generation, and total energy absorption of medium-voltage distribution sections, the total grid supply, total energy absorption within and outside low-voltage distribution sections, and the grid supply, energy absorption within and outside power consumption of power-consuming terminals, this embodiment of the invention also calculates the total power consumption within the low-voltage distribution section. Total power generation within the section Total power absorption within the section Total power connected to the grid within the segment Total power absorption Total grid power Real-time absorption rate and real-time green electricity rate Total generating capacity of medium-voltage distribution section Total power consumption Total power absorption Total Internet Power Total grid power Real-time absorption rate and real-time green electricity rate and the external absorption power of the power consumption terminal Total power absorption Power supply Real-time green electricity rate Total electricity generation .

[0135] ;

[0136] ;

[0137] In the formula, This represents the total power generation capacity of all generating terminals within the low-voltage distribution section.

[0138] ;

[0139] In the formula, Let be the power generation capacity of the generating terminal j in the i-th low-voltage distribution segment.

[0140] When the low-voltage distribution section is in the state of generating electricity and connecting to the grid ( <0, =1, =0) and This indicates that all power consumption at all terminals in the low-voltage distribution section comes from power generation, therefore the total power consumption within the low-voltage distribution section is... This refers to the total power absorbed within the low-voltage distribution section; when the low-voltage distribution section is in an external power supply state ( >=0, =0, =1) and This means that all generated electricity is absorbed, and the total generating capacity of all generating terminals within the low-voltage distribution section is [data missing]. This refers to the total power absorbed within the low-voltage distribution section.

[0141] ;

[0142] ;

[0143] ;

[0144] ;

[0145] ;

[0146] ;

[0147] ;

[0148] ;

[0149] ;

[0150] ;

[0151] ;

[0152] ;

[0153] ;

[0154] .

[0155] The power absorption capacity within the power consumption terminal and the power absorption capacity outside the power consumption terminal are respectively calculated based on the power consumption of the power consumption terminal. Total power consumption within the low-voltage distribution section Percentage conversion:

[0156] ;

[0157] ;

[0158] The total power parameters of the power terminal are calculated as follows:

[0159] ;

[0160] = ;

[0161] ;

[0162] ;

[0163] .

[0164] In each calculation cycle of this invention, all power parameters are calculated first to obtain the power absorbed outside the segment, and then the electricity absorbed outside the segment is integrated before the calculation of the electricity parameters is started.

[0165] The distributed generation multi-user green electricity tracing method based on absorption decomposition proposed in this invention, without adding extra meters or independent green power lines, enables real-time calculation and decomposition of power consumption, low-voltage node, and high-voltage node for each power terminal, each segment's absorption power, external absorption power, grid-supplied power, grid-connected power, power generation, and power consumption within a hybrid distributed generation and distributed power consumption network system. Without adding extra meters or independent green power lines, it also enables real-time calculation and decomposition of electricity consumption, external absorption power, grid-supplied power, grid-connected power, power generation, and power consumption within the segment's absorption capacity, grid-connected power, grid-connected power, power generation, and power consumption within a hybrid distributed generation and distributed power consumption network system. This finer decomposition provides a more intuitive understanding of the power generation and consumption balance in each area of ​​the distributed distribution network.

[0166] This invention also proposes a distributed generation multi-user green electricity traceability system based on absorption decomposition, including:

[0167] The electrical parameter acquisition unit is used to acquire the real-time power, total grid power supply and total grid power of the medium-voltage distribution section, the real-time power, total grid power and positive active power displayed on the low-voltage distribution section, the power generation and power generation of the power generation terminal, and the power consumption and power consumption of the power consumption terminal.

[0168] The distribution section status determination unit is used to determine the status of the medium-voltage distribution section and the low-voltage distribution section based on the real-time power of the meter at the medium-voltage distribution section and the real-time power of the meter at the low-voltage distribution section.

[0169] The absorption decomposition unit is used to calculate and determine the total energy consumption, total energy generation, and total energy absorption of the medium-voltage distribution section, the total grid-connected energy consumption, and total grid-connected energy consumption of the low-voltage distribution section, based on the state of the medium-voltage distribution section, the state of the low-voltage distribution section, the real-time power of the meter at the control point of the medium-voltage distribution section, the total grid-connected energy consumption, and the positive active energy consumption displayed at the control point of the low-voltage distribution section, the power generation and energy consumption of the power generation terminal, and the power consumption and energy consumption of the power consumption terminal.

[0170] It should be noted that the above embodiments of the distributed generation multi-user green electricity traceability system based on absorption decomposition are only illustrated with the above functional module divisions when performing user green electricity traceability analysis. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the equipment can be divided into different functional modules to complete all or part of the functions described above. Furthermore, the distributed generation multi-user green electricity traceability system based on absorption decomposition provided in the above embodiments and the distributed generation multi-user green electricity traceability method embodiments based on absorption decomposition belong to the same concept. The specific implementation process is detailed in the method embodiments and will not be repeated here.

[0171] The present invention also discloses a computer device, the device comprising:

[0172] A processor, adapted to execute computer programs;

[0173] A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the distributed generation multi-user green electricity traceability method based on absorption decomposition proposed in this embodiment of the invention.

[0174] The present invention also discloses a computer-readable storage medium storing a computer program adapted for loading and executing by a processor the distributed generation multi-user green electricity traceability method based on absorption decomposition proposed in the embodiments of the present invention.

[0175] The present invention also discloses a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the distributed generation multi-user green electricity traceability method based on absorption decomposition proposed in the embodiments of the present invention.

[0176] The method proposed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0177] Those skilled in the art will recognize that the units and algorithm steps described in conjunction with the embodiments herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0178] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for tracing the source of green electricity from distributed generation to multiple users based on absorption and decomposition, characterized in that, include: Obtain the real-time power, total grid power supply and total grid-connected power of the metering in the medium-voltage distribution section, the real-time power, total grid-connected power and positive active power displayed on the metering in the low-voltage distribution section, the power generation and power generation of the power generation terminal, and the power consumption and power consumption of the power consumption terminal. Based on the real-time power of the meter at the medium-voltage distribution section and the real-time power of the meter at the low-voltage distribution section, determine the status of the medium-voltage distribution section and the status of the low-voltage distribution section. Using Kirchhoff's first law, based on the states of the medium-voltage and low-voltage distribution sections, the real-time power, total grid supply, and total grid connection power of the medium-voltage distribution section, the real-time power, total grid connection power, and positive active power displayed on the meter of the low-voltage distribution section, the power generation and power generation of the generating terminals, and the power consumption and power consumption of the power consumption terminals, the total power consumption, total power generation, and total power consumption of the medium-voltage distribution section, the total grid supply, total power consumption within the section, and total power consumption outside the section of the low-voltage distribution section, and the grid supply, power consumption within the section, and power consumption outside the section of the power consumption terminals are calculated and determined. The process of calculating and determining the total grid power supply, total power consumption within the low-voltage distribution section, and total power consumption outside the section includes: Calculate the sum of the generated electricity of all generating terminals within the low-voltage distribution section to obtain the total generated electricity of the low-voltage distribution section; Subtract the total grid-connected electricity of the low-voltage distribution section from the total electricity generated by the low-voltage distribution section to obtain the total electricity absorbed within the low-voltage distribution section. According to the real-time power of the low-voltage distribution section's gate meter Calculate and determine the actual power loss of transformers in low-voltage distribution sections. ; ； In the formula, The no-load loss of the transformer at the upper end of the low-voltage distribution section gate meter; The load loss of the transformer at the upper end of the low-voltage distribution section gate meter; The power factor of the distribution section below the low-voltage distribution section gate meter; According to the real-time power of the low-voltage distribution section's gate meter Actual power loss of transformers in low-voltage distribution sections Status of low-voltage distribution sections and real-time power at the control points of medium-voltage distribution sections. Based on the status of the medium-voltage distribution section, calculate and determine the total external power absorption capacity of the medium-voltage distribution section. and the total input of the low-voltage distribution section's external absorption and distribution ; ； ； In the formula, The positive absorption factor for low-voltage distribution sections. The positive absorption factor for medium-voltage power distribution sections. The inverse absorption factor for low-voltage distribution sections; According to the real-time power of the low-voltage distribution section's gate meter Actual power loss of transformers in low-voltage distribution sections Total external power consumption of medium-voltage distribution sections and the total input of the low-voltage distribution section's external absorption and distribution Calculate and determine the total power absorption capacity outside the low-voltage distribution section. ; The total external power consumption of the low-voltage distribution section is calculated and determined based on the total external power consumption of the low-voltage distribution section. The total grid power supply of the low-voltage distribution section is obtained by subtracting the total off-site power consumption of the low-voltage distribution section from the positive active power displayed at the gate meter.

2. The distributed generation multi-user green electricity source tracing method based on absorption decomposition as described in claim 1, characterized in that, When the real-time power of the meter at the medium-voltage distribution section is less than 0, the medium-voltage distribution section is determined to be in the state of generating electricity and connecting to the grid; when the real-time power of the meter at the medium-voltage distribution section is greater than 0, the medium-voltage distribution section is determined to be in the state of external power supply. When the real-time power of the meter at the low-voltage distribution section is less than 0, the low-voltage distribution section is determined to be in a power generation and grid connection state; when the real-time power of the meter at the low-voltage distribution section is greater than 0, the low-voltage distribution section is determined to be in an external power supply state.

3. The distributed generation multi-user green electricity source tracing method based on absorption decomposition as described in claim 1, characterized in that, The process of calculating and determining the total electricity consumption, total electricity generation, and total electricity absorption of a medium-voltage distribution section is as follows: Calculate the sum of the generated electricity of all generating terminals within the medium-voltage distribution section to obtain the total generated electricity of the medium-voltage distribution section; The total electricity consumption of the medium-voltage distribution section is calculated by subtracting the total electricity generated by the medium-voltage distribution section from the total electricity fed into the grid by the medium-voltage distribution section. The total electricity consumption of the medium-voltage distribution section is calculated by adding the total grid power supply of the medium-voltage distribution section to the total electricity consumption of the medium-voltage distribution section.

4. The distributed generation multi-user green electricity source tracing method based on absorption decomposition as described in claim 1, characterized in that, The process of calculating and determining the grid-supplied electricity, intra-section absorbed electricity, and inter-section absorbed electricity for the power consumption terminal includes: Calculate the sum of the electricity consumption of all electrical terminals within the low-voltage distribution section to obtain the total electricity consumption of the low-voltage distribution section; Calculate the proportion of the electricity consumption of the power consumption terminal in the total electricity consumption of the low-voltage distribution section, and multiply this proportion by the total electricity consumption within the low-voltage distribution section to obtain the electricity consumption of the power consumption terminal within the section. Calculate the proportion of the power consumption of the power terminal in the total power consumption of all power terminals under the low-voltage distribution section, and multiply this proportion by the total power absorption outside the low-voltage distribution section and the state of the low-voltage distribution section to obtain the power absorption outside the power terminal. The external absorption capacity of the power consumption terminal is calculated and determined based on the external absorption capacity of the power consumption terminal. Calculate the sum of the electricity consumption within the segment and the electricity consumption outside the segment of the electricity consumption terminal to obtain the total electricity consumption of the electricity consumption terminal; The grid supply power of the power consumption terminal is calculated by subtracting the total electricity consumption of the power consumption terminal from the electricity consumption of the power consumption terminal.

5. A system for implementing the distributed generation multi-user green electricity source tracing method based on absorption decomposition according to any one of claims 1-4, characterized in that, include: The electrical parameter acquisition unit is used to acquire the real-time power, total grid power supply and total grid power of the medium-voltage distribution section, the real-time power, total grid power and positive active power displayed on the low-voltage distribution section, the power generation and power generation of the power generation terminal, and the power consumption and power consumption of the power consumption terminal. The distribution section status determination unit is used to determine the status of the medium-voltage distribution section and the low-voltage distribution section based on the real-time power of the meter at the medium-voltage distribution section and the real-time power of the meter at the low-voltage distribution section. The absorption decomposition unit is used to calculate and determine the total energy consumption, total energy generation, and total energy absorption of the medium-voltage distribution section, the total grid-connected energy consumption, and total grid-connected energy consumption of the low-voltage distribution section, based on the state of the medium-voltage distribution section, the state of the low-voltage distribution section, the real-time power of the meter at the control point of the medium-voltage distribution section, the total grid-connected energy consumption, and the positive active energy consumption displayed at the control point of the low-voltage distribution section, the power generation and energy consumption of the power generation terminal, and the power consumption and energy consumption of the power consumption terminal.

6. An electronic device, characterized in that, The device includes: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the distributed generation multi-user green electricity traceability method based on absorption decomposition as described in any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program adapted to be loaded by a processor and executed by the distributed generation multi-user green electricity tracing method based on absorption decomposition as described in any one of claims 1-4.

8. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the distributed generation multi-user green electricity traceability method based on absorption decomposition as described in any one of claims 1-4.

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