A method and system for generating a frozen file for substation metering test

Abstract

The application belongs to the technical field of substation metering test, and particularly relates to a substation metering test frozen file generation method and system. The method obtains busbar associated line interval information and transformer interval information according to substation system specification description (SSD) in substation system configuration file (SCD), and then generates interval information list of the busbar and interval information list of the main transformer. The method calculates power energy data sequence of each outgoing line interval and power energy data sequence of each side of the main transformer in each voltage level according to the interval information list and set loss and power flow distribution parameters. The method generates corresponding frozen files according to set file name and data format rules. The method does not consume time for operation of power energy metering devices, thereby reducing time for generating frozen files and improving efficiency of generating frozen files.

Description

Technical Field

[0001] This invention belongs to the field of substation metering and testing technology, specifically relating to a method and system for generating frozen files for substation metering and testing. Background Technology

[0002] The substation monitoring system specification, "Technical Specification for Independent and Controllable New Generation Substation Secondary Systems, Series Specification 1: Application Functions of Substation Control Systems," stipulates that substation monitoring systems must possess energy loss analysis capabilities. The specification requires energy loss calculation based on frozen files; therefore, testing this function necessitates the use of frozen files. Frozen files are files stored by metering devices to collect important data at specific moments during grid operation. Data types include metering, demand, measurement, and events. Frozen files are generated and stored during the operation of the metering device; daily, monthly, and yearly frozen files are generated at fixed times each day, month, and year, respectively. If a frozen file covering a specific time period is needed, it can only be obtained after the energy metering device has been running for the corresponding period, which is time-consuming. Furthermore, the energy loss analysis function needs to meet the requirements of different substation main wiring diagrams and varying loss data on-site. Therefore, a universal and efficient method for generating frozen files is needed to improve the testing efficiency of the energy loss analysis function. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for generating frozen files for substation metering and testing, in order to solve the problem of low efficiency in the method of obtaining frozen files for a period of time only after the power metering device has been running for a certain period of time.

[0004] To address the aforementioned technical problems, this invention provides a method for generating a freeze file for substation metering and testing, comprising the following steps:

[0005] 1) Parse the primary equipment connection relationship according to the substation system specification description in the substation system configuration file, generate the bus-associated line bay information and transformer bay information according to the voltage level, generate the bus bay information list according to the bus-associated line bay information, and generate the main transformer bay information list according to the transformer bay information.

[0006] 2) Calculate the electrical energy data sequence of each outgoing line bay in each voltage level based on the bus bay information list and the set loss and power flow distribution; calculate the electrical energy data sequence of each side of the main transformer based on the main transformer bay information list and the set loss and power flow distribution parameters.

[0007] 3) Generate corresponding frozen files by taking the electrical energy data sequences of each outgoing line bay in each voltage level and the electrical energy data sequences of each side of the main transformer according to the set file name and data format rules.

[0008] The beneficial effects are as follows: The method of this invention obtains the corresponding bay information list from the substation system specification description, and calculates the electrical energy data sequence of each outgoing bay at each voltage level and the electrical energy data sequence of each side of the main transformer based on this bay information list and the set loss and power flow distribution parameters. Therefore, the frozen file is generated quickly based on the calculated electrical energy data sequence. Since this process does not require the operation time of the electrical energy metering device but generates the corresponding frozen file using existing data, the time consumed by the operation of the electrical energy metering device is eliminated, thereby reducing the time for generating the frozen file and improving the efficiency of generating the frozen file.

[0009] Further, in step 1), the method for generating the bus bay information list based on the line bay information associated with the bus includes: traversing non-bus bay devices under the same voltage level, and if the connection point connected by this device is the same as the connection point defined in the bus bay, then adding the bay of the non-bus bay device to the bus bay information list.

[0010] Furthermore, the method for generating a bus bay information list based on the line bay information associated with the bus also includes: traversing non-bus bays under the same voltage level, traversing the equipment in the non-bus bay, and if two equipment in the non-bus bay have the same connection point as the connection point defined in different bus bays, then the bay is deleted from the bus bay information list.

[0011] Further, in step 1), the method for generating the main transformer's interval information list based on the transformer interval information includes: traversing the intervals under each voltage level, and if the connection point of the equipment in the interval is the same as the connection point of the equipment in the main transformer interval, then adding the interval to the main transformer's interval information list.

[0012] The method of this invention is based on the substation topology connection information in the SCD (Substation System Configuration File). By parsing the SSD (Substation System Specification Description), the required topology information can be calculated to meet the needs of different substation main wiring. Furthermore, the frozen file generated by the method in this embodiment is generated quickly; that is, based on the topology connection relationship, and according to the initialization data and setting parameters, the frozen file is quickly generated by software.

[0013] Further, in step 2), the method for obtaining the electrical energy data sequence of each outgoing line interval in each voltage level includes: obtaining the initial electrical energy value of the incoming line according to the bus interval information list; obtaining the total electrical energy of the outgoing line intervals of each voltage level according to the initial electrical energy value of the incoming line and the bus loss setting value of each voltage level; and obtaining the electrical energy data sequence of each outgoing line interval in each voltage level by multiplying the total electrical energy of the outgoing line intervals by the power flow distribution percentage value configured for the interval in the set loss.

[0014] Furthermore, the calculation formulas for obtaining the electrical energy data sequence of each outgoing line interval in each voltage level include: Mouti = Mtotal × pi1; where Mtotal is the total electrical energy of outgoing line bays of the same voltage level, k1 is the bus loss setting value of the voltage level, Mi is the initial electrical energy value of incoming line i, n is the total number of incoming lines, Mouti is the electrical energy value of outgoing line bay i, and pi1 is the power flow distribution percentage value configured for the bay.

[0015] The method of the present invention improves the efficiency of generating freeze files by setting bus loss settings in the loss settings and power flow allocation percentages in the power flow allocation settings, and then obtaining the electrical energy data sequence required to generate freeze files through corresponding calculation formulas.

[0016] Further, in step 2), the method for obtaining the electrical energy data sequence of each side of the main transformer includes: obtaining the electrical energy data sequence of the high-voltage side of the main transformer from the electrical energy data sequence of each outgoing line interval in each voltage level according to the interval name; obtaining the electrical energy value of the low-voltage side of the main transformer according to the electrical energy data sequence of the high-voltage side of the main transformer and the transformer loss setting value; and obtaining the electrical energy sequence of each side of the main transformer by multiplying the electrical energy value of the low-voltage side of the main transformer and the power flow distribution percentage value of the low-voltage side of the transformer in the set loss.

[0017] Furthermore, the calculation formulas for the electrical energy data sequence of each side of the main transformer include: Mtotall=(1-k2)×Mptrh, Mptrli=Mtotall×pi2; where Mtotall is the total electrical energy on the low-voltage side of the transformer, k2 is the loss setting value of the transformer, Mptrh is the electrical energy value on the high-voltage side of the main transformer, Mptrli is the electrical energy value on the low-voltage side i of the transformer, and pi2 is the power flow distribution percentage value on the low-voltage side i of the transformer.

[0018] The method of the present invention improves the efficiency of generating frozen files by setting a transformer loss setting value in the loss setting and a transformer low-voltage side power flow distribution percentage value in the power flow distribution setting, and then obtaining the electrical energy data sequence required to generate frozen files through corresponding calculation formulas.

[0019] Further, in step 2), the method for obtaining the electrical energy data sequence of each outgoing line bay in each voltage level includes: obtaining the busbar and its associated bay list information of non-high voltage level according to the bus bay information list; obtaining the electrical energy data sequence of the low-voltage side bay of the main transformer associated with the voltage level from the electrical energy sequence of each side of the main transformer according to the bay name; obtaining the total electrical energy of the outgoing line bay of the same voltage level according to the electrical energy data sequence of the low-voltage side bay of the main transformer and the bus loss setting value of the voltage level; and obtaining the electrical energy data sequence of each outgoing line bay in each voltage level by multiplying the total electrical energy of the outgoing line bay by the power flow distribution percentage value configured for the bay in the set loss.

[0020] The method of this invention, when generating the electrical energy data sequence of each outgoing line bay in a non-high voltage level, utilizes the electrical energy data sequence of the main transformer low-voltage side bay associated with that voltage level from the electrical energy sequence of each side of the main transformer. The electrical energy data sequence of the main transformer low-voltage side bay utilizes the electrical energy data sequence of each outgoing line bay in each voltage level. The electrical energy data sequence of each outgoing line bay in each voltage level is obtained based on the bus bay information list and the set loss and power flow distribution calculation. Therefore, this method of obtaining the electrical energy data sequence of each outgoing line bay in a non-high voltage level is still based on the electrical energy data sequence of each outgoing line bay in each voltage level obtained by calculating the electrical energy data sequence of each outgoing line bay in each voltage level according to the bus bay information list and the set loss and power flow distribution.

[0021] To address the aforementioned technical problems, this invention also provides a system for generating frozen files for substation metering tests, including a memory and a processor. The processor executes instructions to implement the steps of the method for generating frozen files for substation metering tests described above, and achieves the same beneficial effects as the method. Attached Figure Description

[0022] Figure 1 This is a flowchart of the method for generating frozen files for substation metering and testing according to the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Example of a method for generating frozen files for substation metering and testing:

[0025] To improve the efficiency of generating freeze files for a given period and to accommodate different loss data required for power loss analysis at different substations, this embodiment uses the substation system configuration description (SCD) as a base. It parses the substation system specification description and centralized metering device information within the SCD to obtain the raw data needed for generating freeze files for the corresponding substations. Based on this raw data and the corresponding calculation process in this embodiment, the electrical energy data in the freeze file is obtained, and the corresponding freeze file is generated based on this electrical energy data. This embodiment's method is based on the substation system configuration description, which includes the substation system specification description (SSD) and centralized metering device information. The centralized metering device is an energy metering device that simultaneously receives voltage and current sampling values ​​from multiple substation bays and performs metering and centralized data processing. The freeze file generated in this embodiment is used to calculate electrical energy loss. Substation electrical energy loss calculation includes three categories: bus imbalance, transformer loss, and total substation loss. Each type of loss uses the associated bay electrical energy data as calculation data, and the loss is calculated based on the power flow relationship. The centralized metering device collects electricity measurement data from all bays across the entire station. Each Logical Device (LD) collects electricity measurement data from one bay. The LD's description information is the bay name, and the LD in the frozen file name must be consistent with the name of each LD in the centralized metering device. For example... Figure 1 Based on the SCD model and the centralized metering device model, the steps for generating the freeze file are as follows:

[0026] 1) Topology information generation.

[0027] The method in this embodiment generates bus-associated line and transformer (bus tie and bus branch intervals ignored) interval information according to voltage level based on the primary device connection relationship in the SSD; the mapping information includes a list of bus level and interval information. Specifically, the topology information generation method includes:

[0028] 1.1) Bus identification: Within the same voltage level, EBUS obtains information on all busbars within that voltage level based on the equipment type;

[0029] 1.2) Spare section list information generation: Traverse non-busbar spare section equipment under the same voltage level. If the connection point (connectivityNode) connected to the primary equipment is the same as the connection point (ConnectivityNode) defined in the busbar spare section, then the spare section is connected to the busbar and the spare section is added to the spare section information list.

[0030] 1.3) Removing Bus Ties and Bus Branch Interchanges: Since loss calculations do not require consideration of operating modes, bus tie or bus branch interchanges need to be removed from the interchange information list. The removal process is as follows: Traverse the non-busbar interchanges under the same voltage level, traverse the equipment within the non-busbar interchange, and if two devices in the non-busbar interchange have the same connection point (connectivityNode) as the connection point (connectivityNode) defined in different busbar interchanges, then the interchange is a bus tie or bus branch interchange, and then the interchange is removed from the interchange information list.

[0031] 1.4) Main transformer identification: At the highest voltage level, all main transformer information is obtained according to the equipment type PTR;

[0032] 1.5) Identification of the main transformer bays: Traverse the bays under each voltage level. If the connection point (connectivityNode) of the equipment in the bay is the same as the connection point (ConnectivityNode) of the equipment in the main transformer bay, then the bay is connected to the main transformer and the bay is added to the main transformer's bay list.

[0033] 2) Power direction setting.

[0034] Based on the needs of loss analysis calculation, a certain number of incoming lines (flow direction is inflow to the bus) are set, and the configuration information is the interval name. If the interval is not configured as an incoming line type, it will default to an outgoing line interval (flow direction is outflow to the bus).

[0035] 3) Loss and power flow distribution settings.

[0036] The bus losses are set progressively from high to low based on the voltage level (or randomly generated, between 0 and 0.01), and the power flow distribution percentage of the outgoing line bays at that voltage level is set (or randomly generated, the sum of the power flow distribution percentages of all outgoing line bays should be 1) to calculate the electrical energy data of each outgoing line bay.

[0037] Each transformer has its transformer loss set, and a low-voltage side power flow distribution percentage is set (or randomly generated, the sum of all low-voltage side bay power flow distribution percentages should be 1) to calculate the electrical energy data of the main transformer's low-voltage side bay.

[0038] 4) Initialize incoming data.

[0039] The four energy data points for each incoming line interval at the highest voltage level—forward total active energy, reverse total active energy, forward total reactive energy, and reverse total reactive energy—are initialized to a random number greater than 0. Then, each type of energy is gradually increased according to a defined change value to generate a sequence of 1000 (the number of data points can be set as needed) energy data points. These data points serve as the initial energy data for the incoming line for a certain period.

[0040] 5) Generation of electrical energy data for the bus-associated bay at the highest voltage level.

[0041] 5.1) Based on the topology information generated in step 1), obtain the list information of the highest voltage level bus and its associated bays.

[0042] 5.2) Calculate the total electrical energy of the outgoing lines at the highest voltage level. The calculation method is as follows:

[0043] Where Mtotal is the total electrical energy of the outgoing line intervals at the same voltage level, k1 is the bus loss setting value for that voltage level (this value is the bus loss set step by step from high to low according to the voltage level in step 3), Mi is the initial electrical energy value of incoming line i, and n is the total number of incoming lines.

[0044] 5.3) Calculation of outgoing line electrical energy data, the calculation method is as follows:

[0045] Mouti = Mtotal × pi1; where Mouti is the energy value of outgoing line interval i, pi1 is the power flow distribution percentage value configured for this interval (i.e., in step 3, the power flow distribution percentage of outgoing line intervals under this voltage level is set), and Mtotal is the total energy of outgoing line intervals, which is calculated by the calculation method in step 5.2).

[0046] 5.4) Iterative calculation:

[0047] Steps 5.2) and 5.3) are repeated 1000 times to calculate 1000 electrical energy data sequences for each outgoing line interval in the highest voltage level. Since step 4) generates a sequence of 1000 electrical energy data by gradually increasing each type of electrical energy according to a set change value, each incoming line has 1000 initial electrical energy values. Therefore, in this embodiment, step 5.2)...

[0048] 5.3) Repeat 1000 times to obtain 1000 electrical energy data sequences corresponding to 1000 initial electrical energy values ​​for each incoming line.

[0049] 6) Calculation of electrical energy data on the low-voltage side of the transformer.

[0050] 6.1) Based on the topology information generated in step 1), obtain the list information of each transformer and its associated bay.

[0051] 6.2) Obtain 1000 electrical energy data sequences Mptrh from the cyclic calculation results of step 5.4) based on the interval name.

[0052] 6.3) Calculate the total electrical energy on the low-voltage side of the main transformer. The calculation method is as follows:

[0053] Mtotall = (1-k2) × Mptrh; where Mtotall is the total electrical energy on the low-voltage side of the transformer, k2 is the transformer loss setting value (this value is the transformer loss setting for each transformer in step 3), and Mptrh is the electrical energy value on the high-voltage side of the main transformer.

[0054] 6.4) Calculation of low-voltage side electrical energy data, the calculation method is as follows:

[0055] Mptrli = Mtotall × pi2; where Mptrli is the electrical energy value of the low-voltage side i of the transformer, pi2 is the power flow distribution percentage value of the low-voltage side i of the transformer (this value is the power flow distribution percentage set in step 3), and Mtotall is the total electrical energy of the low-voltage side of the transformer, which is calculated by the calculation method in step 6.3).

[0056] 6.5) Iterative calculation:

[0057] Steps 6.3) and 6.4) are repeated 1000 times to calculate 1000 electrical energy data sequences for each side of the main transformer. Since the electrical energy data sequences for the high-voltage side of the main transformer obtained in step 6.2) are 1000, steps 6.3) and 6.4) are repeated 1000 times to obtain 1000 electrical energy data sequences for each side of the main transformer corresponding to the 1000 electrical energy data for the high-voltage side of the main transformer.

[0058] 7) Generation of busbar association bay data for non-highest voltage levels.

[0059] 7.1) Based on the topology information generated in step 1), obtain the list information of buses and their associated bays that are not at the highest voltage level.

[0060] 7.2) Based on the bay name, obtain the 1000 electrical energy data sequences Mptrl of the low-voltage side bay of the main transformer associated with this voltage level from the cyclic calculation results of step 6.5;

[0061] 7.3) Calculate the total electrical energy of the outgoing lines at this voltage level. The calculation method is as follows:

[0062] Mtotal = (1-k3) × Mptrl, where Mtotal is the total electrical energy of the outgoing line intervals at the same voltage level; k3 is the bus loss setting value for that voltage level (this value is the bus loss set step by step from high to low according to the voltage level in step 3); Mptrl is the electrical energy data of the low-voltage side of the main transformer obtained in step 7.2).

[0063] 7.4) Calculation of outgoing line electrical energy data, the calculation method is as follows:

[0064] Mouti = Mtotal × pi3; where Mouti is the energy value of outgoing line interval i, pi3 is the power flow distribution percentage value configured for this interval (i.e., in step 3, the power flow distribution percentage of outgoing line intervals under this voltage level is set), and Mtotal is the total energy of outgoing line intervals, calculated by the calculation method in step 7.3).

[0065] 7.5) Iterative calculation.

[0066] Steps 7.3) and 7.4) are repeated 1000 times to calculate 1000 electrical energy data sequences for each outgoing line bay in this voltage level. Since step 7.2) obtains 1000 electrical energy data sequences for the low-voltage side bay of the main transformer associated with this voltage level, steps 7.3) and 7.4) are repeated 1000 times to obtain 1000 electrical energy data sequences for each outgoing line bay in this voltage level.

[0067] 8) Freeze file generation.

[0068] Based on the 1000 electrical energy data sequences generated in steps 5), 6), and 7), 1000 frozen files are generated sequentially for each interval; the names and data formats of the frozen files are generated in accordance with the requirements of the "Technical Specification for Secondary Systems of Independent and Controllable New Generation Substations - Device Series Specification 7 - Centralized Metering Devices".

[0069] The method in this embodiment is based on topology connections to quickly construct a data generation model, adapting to the needs of different main wiring configurations. Specifically, this method uses substation topology connection information in the SCD (Substation Data Center) to parse the SSD and calculate the required topology information, meeting the needs of different substation main wiring configurations. Furthermore, the frozen file generated by this method is rapid; based on the topology connection relationships, initialization data, and set parameters, the frozen file is quickly generated by software. Test data on the generation speed of this method is as follows:

[0070] 1 8 3400 186 2 14 6150 350

[0071] Therefore, the increased speed of generating frozen files leads to a corresponding increase in the testing efficiency of substation energy loss analysis functions based on these frozen files, which in turn increases the testing speed of substation energy loss analysis algorithms.

[0072] Example of a system for generating frozen files for substation metering and testing:

[0073] The system in this embodiment includes a memory and a processor. The processor is used to execute instructions to implement the steps of the method for generating frozen files for substation metering tests. The steps of the method for generating frozen files for substation metering tests have been described in detail in the embodiment of the method for generating frozen files for substation metering tests, and will not be repeated here.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A method for generating a freeze file for substation metering and testing, characterized in that, Includes the following steps: 1) Parse the primary equipment connection relationship according to the substation system specification description in the substation system configuration file, generate the bus-associated line bay information and transformer bay information according to the voltage level, generate the bus bay information list according to the bus-associated line bay information, and generate the main transformer bay information list according to the transformer bay information. 2) Obtain the initial energy value Mi of incoming line i from the bus bay information list. Based on the initial energy value Mi of this incoming line and the bus loss setting value k1 for each voltage level, use the formula... The total electrical energy Mtotal of each voltage level outgoing line bay is calculated, where n is the total number of incoming lines. The electrical energy value of each outgoing line bay at each voltage level is obtained by multiplying Mtotal by the power flow distribution percentage value configured for each outgoing line bay in the set loss settings, thus obtaining the electrical energy data sequence of each outgoing line bay. Based on the bay name, the high-voltage side electrical energy value Mptrh of the main transformer is obtained from the electrical energy data sequence of each outgoing line bay at each voltage level. Based on this high-voltage side electrical energy value and the main transformer loss setpoint k2, the energy is calculated using the formula... The total electrical energy Mtotall on the low-voltage side of the transformer is calculated. The electrical energy value of the low-voltage side i of the transformer is obtained by multiplying Mtotall by the power flow distribution percentage value of the low-voltage side i of the transformer in the set loss. Then, the electrical energy data sequence of each side of the main transformer is obtained. 3) Generate corresponding frozen files by taking the electrical energy data sequences of each outgoing line bay in each voltage level and the electrical energy data sequences of each side of the main transformer according to the set file names and data format rules.

2. The method for generating a frozen file for substation metering and testing according to claim 1, characterized in that, In step 1), the method for generating the bus bay information list based on the line bay information associated with the bus includes: traversing non-bus bay devices under the same voltage level, and if the connection point connected by this device is the same as the connection point defined in the bus bay, then adding the bay of the non-bus bay device to the bus bay information list.

3. The method for generating frozen files for substation metering and testing according to claim 2, characterized in that, The method for generating a bus bay information list based on the line bay information associated with the bus also includes: traversing non-bus bays under the same voltage level, traversing the equipment in the non-bus bay, and if two equipment in the non-bus bay have the same connection point as the connection point defined in different bus bays, then the bay is deleted from the bus bay information list.

4. The method for generating a frozen file for substation metering and testing according to claim 1, characterized in that, In step 1), the method for generating the main transformer's interval information list based on the transformer interval information includes: traversing the intervals under each voltage level, and if the connection point of the equipment in the interval is the same as the connection point of the equipment in the main transformer interval, then adding the interval to the main transformer's interval information list.

5. The method for generating a frozen file for substation metering and testing according to claim 1, characterized in that, In step 2), the method for obtaining the electrical energy data sequence of each outgoing line bay includes: obtaining the busbar and its associated bay list information of non-high voltage level according to the bus bay information list; obtaining the electrical energy data sequence of the low-voltage side bay of the main transformer associated with the voltage level from the electrical energy sequence of each side of the main transformer according to the bay name; obtaining the total electrical energy of the outgoing line bay of the same voltage level according to the electrical energy data sequence of the low-voltage side bay of the main transformer and the bus loss setting value of the voltage level; and obtaining the electrical energy data sequence of each outgoing line bay in each voltage level by multiplying the total electrical energy of the outgoing line bay by the power flow distribution percentage value configured for the bay in the set loss.

6. A system for generating frozen files for substation metering and testing, characterized in that, The system includes a memory and a processor. The processor executes instructions to implement a method for generating freeze files for substation metering tests. The method for generating freeze files for substation metering tests includes the following steps: 1) Parse the primary equipment connection relationship according to the substation system specification description in the substation system configuration file, generate the bus-associated line bay information and transformer bay information according to the voltage level, generate the bus bay information list according to the bus-associated line bay information, and generate the main transformer bay information list according to the transformer bay information. 2) Obtain the initial energy value Mi of incoming line i from the bus bay information list. Based on the initial energy value Mi of this incoming line and the bus loss setting value k1 for each voltage level, use the formula... The total electrical energy Mtotal of each voltage level outgoing line bay is calculated, where n is the total number of incoming lines. The electrical energy value of each outgoing line bay at each voltage level is obtained by multiplying Mtotal by the power flow distribution percentage value configured for each outgoing line bay in the set loss settings, thus obtaining the electrical energy data sequence of each outgoing line bay. Based on the bay name, the high-voltage side electrical energy value Mptrh of the main transformer is obtained from the electrical energy data sequence of each outgoing line bay at each voltage level. Based on this high-voltage side electrical energy value and the main transformer loss setpoint k2, the energy is calculated using the formula... The total electrical energy Mtotall on the low-voltage side of the transformer is calculated. The electrical energy value of the low-voltage side i of the transformer is obtained by multiplying Mtotall by the power flow distribution percentage value of the low-voltage side i of the transformer in the set loss. Then, the electrical energy data sequence of each side of the main transformer is obtained. 3) Generate corresponding frozen files by taking the electrical energy data sequences of each outgoing line bay in each voltage level and the electrical energy data sequences of each side of the main transformer according to the set file names and data format rules.

7. The substation metering and testing freeze file generation system according to claim 6, characterized in that, In step 1), the method for generating the bus bay information list based on the line bay information associated with the bus includes: traversing non-bus bay devices under the same voltage level, and if the connection point connected by this device is the same as the connection point defined in the bus bay, then adding the bay of the non-bus bay device to the bus bay information list.

8. The substation metering and testing freeze file generation system according to claim 7, characterized in that, The method for generating a bus bay information list based on the line bay information associated with the bus also includes: traversing non-bus bays under the same voltage level, traversing the equipment in the non-bus bay, and if two equipment in the non-bus bay have the same connection point as the connection point defined in different bus bays, then the bay is deleted from the bus bay information list.

9. The substation metering and testing freeze file generation system according to claim 6, characterized in that, In step 1), the method for generating the main transformer's interval information list based on the transformer interval information includes: traversing the intervals under each voltage level, and if the connection point of the equipment in the interval is the same as the connection point of the equipment in the main transformer interval, then adding the interval to the main transformer's interval information list.

10. The substation metering and testing freeze file generation system according to claim 6, characterized in that, In step 2), the method for obtaining the electrical energy data sequence of each outgoing line bay includes: obtaining the busbar and its associated bay list information of non-high voltage level according to the bus bay information list; obtaining the electrical energy data sequence of the low-voltage side bay of the main transformer associated with the voltage level from the electrical energy sequence of each side of the main transformer according to the bay name; obtaining the total electrical energy of the outgoing line bay of the same voltage level according to the electrical energy data sequence of the low-voltage side bay of the main transformer and the bus loss setting value of the voltage level; and obtaining the electrical energy data sequence of each outgoing line bay in each voltage level by multiplying the total electrical energy of the outgoing line bay by the power flow distribution percentage value configured for the bay in the set loss.

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