Optimization method and device for load bearing of radiation power supply line

Abstract

The present invention provides a method and device for optimizing the load bearing of a radiation power supply line, the method comprising: collecting line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; calculating the maximum load of the radiation power supply line according to the line impedance parameters, the transformer impedance parameters and the power supply impedance parameters; and determining the load capacity that can be connected to the radiation power supply line based on the maximum load. The present invention can ensure that the system voltage level meets the requirements after the load is connected and does not exceed the agreed capacity of the line.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a method and device for optimizing load bearing of a radiation power supply line. Background Art

[0002] For a long time, due to the remote geographical location, backward power grid construction and poor power quality in low-density areas, the regional economic and social development and the lives of local residents have been seriously affected. In recent years, the electrification rate in low-density areas has been greatly improved. With the transformation of the distribution network in recent years, a power supply mode of ring network connection and radial power supply has gradually been formed, and the power supply reliability has been greatly improved.

[0003] At present, radial power supply lines are widely used in distribution networks. In low-density areas with relatively weak system grids, radial power supply lines may have low voltage problems due to long power supply distances, and when the load is large, it may cause power supply line overload problems. How to reasonably plan the load capacity that can be connected to radial power supply lines so that the line protocol capacity can be fully utilized without causing the voltage at the end of the line to be too low is a problem that radial power lines need to solve. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a method and device for optimizing the load bearing of a radial power supply line, ensuring that the voltage level meets the requirements after the load is connected and does not exceed the agreed capacity of the radial power supply line.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for optimizing load bearing of a radiation power supply line, comprising:

[0007] Collect line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line;

[0008] Calculate the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter;

[0009] The load capacity accessible to the radiation power supply line is determined based on the maximum load.

[0010] Furthermore, before collecting the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line, it also includes:

[0011] Perform transformation ratio reduction processing on the radiation power supply line to obtain the equivalent line of the radiation power supply line;

[0012] Correspondingly, the collecting of line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line includes:

[0013] Collect line impedance parameters, transformer impedance parameters and power supply impedance parameters of equivalent lines.

[0014] The step of calculating the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter comprises:

[0015] Based on the first constraint condition, the first load of the radiation power supply line is calculated according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the first constraint condition includes: the voltage at the load access position is less than or equal to the lower limit of the voltage level;

[0016] If the first load is less than or equal to the agreed load of the radiation power supply line, the first load is determined to be the maximum load of the radiation power supply line.

[0017] Furthermore, it also includes:

[0018] If the first load is greater than the agreed load of the radiation power supply line, then based on the second constraint condition, the second load of the radiation power supply line is calculated according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the second constraint condition includes: the voltage at the load access location is less than or equal to the lower limit of the voltage level, and the total load of the radiation power supply line is equal to the agreed load of the radiation power supply line;

[0019] The second load is determined to be the maximum load of the radiation power supply line.

[0020] In a second aspect, the present invention provides a device for optimizing load bearing of a radiation power supply line, comprising:

[0021] A collection module, used for collecting line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line;

[0022] A calculation module, used for calculating the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter;

[0023] The optimization module is used to determine the load capacity that can be connected to the radial power supply line based on the maximum load.

[0024] Furthermore, it also includes:

[0025] A processing module, used for performing transformation ratio reduction processing on the radiation power supply line to obtain an equivalent line of the radiation power supply line;

[0026] Correspondingly, the acquisition module includes:

[0027] The acquisition unit is used to acquire line impedance parameters, transformer impedance parameters and power supply impedance parameters of the equivalent line.

[0028] Wherein, the calculation module includes:

[0029] A first calculation unit is used to calculate a first load of the radiation power supply line based on a first constraint condition according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the first constraint condition includes: a voltage at a load access position is less than or equal to a lower limit of a voltage level;

[0030] The first judgment unit is configured to determine that the first load is a maximum load of the radiation power supply line if the first load is less than or equal to the agreed load of the radiation power supply line.

[0031] Furthermore, it also includes:

[0032] A second calculation unit is configured to calculate a second load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter based on a second constraint condition if the first load is greater than the agreed load of the radiation power supply line; wherein the second constraint condition includes: the voltage at the load access position is less than or equal to the lower limit of the voltage level, and the total load of the radiation power supply line is equal to the agreed load of the radiation power supply line;

[0033] The second judgment unit is used to determine that the second load is the maximum load of the radiation power supply line.

[0034] In a third aspect, the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for optimizing the load bearing of a radiation power supply line when executing the program.

[0035] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for optimizing the load bearing of a radiation power supply line.

[0036] It can be seen from the above technical scheme that the present invention provides a method and device for optimizing the load bearing of a radiation power supply line, by collecting the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; calculating the maximum load of the radiation power supply line according to the line impedance parameters, the transformer impedance parameters and the power supply impedance parameters; and determining the load capacity that can be connected to the radiation power supply line based on the maximum load. It can ensure that the system voltage level meets the requirements after the load is connected and does not exceed the agreed capacity of the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of a first process of a method for optimizing load bearing of a radiation power supply line in an embodiment of the present invention.

[0039] Figure 2 It is a second flow chart of the method for optimizing the load bearing of the radiation power supply line in the embodiment of the present invention.

[0040] Figure 3 It is a schematic diagram of a radiation power supply line in a method for optimizing load bearing of a radiation power supply line according to an embodiment of the present invention.

[0041] Figure 4 It is a schematic diagram of an equivalent line in the method for optimizing load bearing of a radiation power supply line according to an embodiment of the present invention.

[0042] Figure 5 It is a schematic diagram of the structure of a device for optimizing load bearing of a radiation power supply line in an embodiment of the present invention.

[0043] Figure 6 Schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The present invention provides an embodiment of a method for optimizing load bearing of a radiation power supply line, see Figure 1 The method for optimizing the load bearing of the radiation power supply line specifically includes the following contents:

[0046] S101: collecting line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line;

[0047] It should be noted that the line impedance parameters refer to the impedance and reactance on the transmission line during the power transmission process; the transformer impedance parameters refer to the impedance and reactance on the transformer during the power transmission process; and the power supply impedance parameters refer to the voltage and reactance on the power supply system side during the power transmission process.

[0048] S102: Calculating the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter;

[0049] In this step, the radiation power supply lines have the following relationship:

[0050]

[0051]

[0052] Among them, R T is the impedance of the transformer, R L is the impedance of the transmission line, j represents the imaginary part, is the voltage vector at the load connection location, is the vector of the power supply system voltage, k is the transformation ratio between the high voltage side and the low voltage side of the transformer; X'0 = X0 / k 2 , X0 is the reactance of the power supply system, X T is the reactance of the transformer, X L is the reactance of the transmission line; is the current vector of the power supply system, S is the load, P is the active power, Q is the reactive power, is the complex conjugate of the current.

[0053] It will be appreciated that all voltages are phase voltages (the voltage of each phase to ground).

[0054] Before calculating the maximum load of the radial power supply line, it is necessary to determine the power factor of the load S Power Factor If the calculated load S is different, the power factor The calculation formula is as follows:

[0055]

[0056] Specific calculations of the maximum load of the radiation power supply line include:

[0057] Based on the first constraint condition, the first load of the radiation power supply line is calculated according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the first constraint condition includes: the voltage at the load access position is less than or equal to the lower limit of the voltage level;

[0058] (1) When calculating, set the voltage U at the load connection location j Equal to the lower limit of the voltage level U set , that is U j =U set . Will U j =U set Substituting into equation (1), we obtain the current I. Then, using equation (2), we substitute the current I into equation (2) to obtain the first load S, which is the maximum load under the first constraint condition.

[0059] If the first load is less than or equal to the agreed load of the radiation power supply line, the first load is determined to be the maximum load of the radiation power supply line.

[0060] In this step, the following formula (3) is used to determine whether the first load S of the radiation power supply line exceeds the agreed load S of the radiation power supply line: set , if the requirements of inequality (3) are met, then the first load S calculated by formula (2) is determined to be the maximum load that the radiation power supply line can carry.

[0061]

[0062] Further, if the first load is greater than the agreed load of the radiation power supply line, the second load of the radiation power supply line is calculated based on the second constraint condition according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the second constraint condition includes: the voltage at the load access position is less than or equal to the lower limit of the voltage level, and the total load of the radiation power supply line is equal to the agreed load of the radiation power supply line;

[0063] (2) In the specific calculation, if the requirements of inequality (3) are not met, it means that the first load S obtained by the above solution only meets the first constraint (only the constraint of voltage level), and the total load of the radial power supply line exceeds the agreed load S of the radial power supply line. set , the maximum load that the radial power supply line can carry should be recalculated. Let the inequality sign of formula (3) be equal, that is, the total power of the radial power supply line is equal to the agreed capacity S of the radial power supply line. set , Substituting formula (1) and formula (2) into formula (3), we can obtain U j and I, and then use formula (2) to obtain the second load. The second load is determined to be the maximum load of the radiation power supply line.

[0064] Considering that the calculation of step (2) is performed after step (1), it must satisfy U j ≥U set Therefore, the second load calculated in step (2) is the maximum load that can be connected to the radial power supply line.

[0065] S103: Determine the load capacity that can be connected to the radiation power supply line based on the maximum load.

[0066] In this step, after determining the maximum load that can be connected to the radial power supply line, the load capacity that can be connected is determined based on the maximum load to ensure that the connected load capacity does not exceed the maximum load, thereby ensuring that the system voltage level meets the requirements after the load is connected and does not exceed the agreed capacity of the line.

[0067] From the above description, it can be seen that the method for optimizing the load bearing of the radiation power supply line provided in the embodiment of the present invention collects the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; calculates the maximum load of the radiation power supply line according to the line impedance parameters, the transformer impedance parameters and the power supply impedance parameters; and determines the load capacity that can be connected to the radiation power supply line based on the maximum load. It can ensure that the system voltage level meets the requirements after the load is connected and does not exceed the agreed capacity of the line.

[0068] In one embodiment of the present invention, see Figure 2 , before step S101 in the method for optimizing the load bearing of the radiation power supply line, specifically includes the following contents:

[0069] S100: performing transformation ratio reduction processing on the radiation power supply line to obtain an equivalent line of the radiation power supply line;

[0070] Correspondingly, the step S101 of collecting the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line includes:

[0071] S1011: Collect line impedance parameters, transformer impedance parameters, and power supply impedance parameters of the equivalent line.

[0072] In this embodiment, determine Figure 3 The radiation power supply line shown in FIG. 1 is subjected to transformation ratio reduction processing to obtain the following Figure 4 Equivalent lines are shown.

[0073] Among them: Figure 3 and Figure 4 As shown in the figure, U0 and X0 are the voltage and reactance of the 110kV power supply system, U0' and X0' are the voltage and reactance of the 110kV power supply system converted to the 35kV transmission line side, U0'=U0 / k, X0'=X0 / k 2 , k is the transformer ratio (high voltage side to low voltage side).

[0074] X T , R T is the reactance and impedance of the 110 / 35kV transformer (reduced to the 35kV side).

[0075] X L , R L The reactance and impedance of the 35kV transmission line.

[0076] U1 is the 110kV side voltage of the 110 / 35kV transformer (U1' is the voltage converted to the 35kV side), U i is the 35kV side voltage of the 110 / 35kV transformer, U j The voltage at the load connection location.

[0077] It should be noted that U0(U0'), R T , R L 、X0(X0'),X T , X L , S set is a known quantity. The rest are unknown quantities, including U j , I, S (S includes P and Q, P and Q can be obtained through S and calculated).

[0078] From the above description, it can be seen that the optimization method for load carrying of radial power supply lines provided in the embodiment of the present invention ensures that the system voltage level meets the requirements after the load is connected and does not exceed the agreed capacity of the line. An optimization method for the load size that can be connected to the radial power supply line is formed, which has guiding significance for the load planning of the radial power supply line.

[0079] The embodiment of the present invention provides a specific implementation of a radiation power supply line load carrying optimization device that can realize all the contents of the radiation power supply line load carrying optimization method, see Figure 5 The radiation power supply line load carrying optimization device specifically includes the following contents:

[0080] The acquisition module 10 is used to acquire line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line;

[0081] A calculation module 20, configured to calculate a maximum load of a radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter;

[0082] The optimization module 30 is used to determine the load capacity that can be connected to the radial power supply line based on the maximum load.

[0083] Furthermore, it also includes:

[0084] A processing module, used for performing transformation ratio reduction processing on the radiation power supply line to obtain an equivalent line of the radiation power supply line;

[0085] Correspondingly, the acquisition module includes:

[0086] The acquisition unit is used to acquire line impedance parameters, transformer impedance parameters and power supply impedance parameters of the equivalent line.

[0087] Wherein, the calculation module includes:

[0088] A first calculation unit is used to calculate a first load of the radiation power supply line based on a first constraint condition according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the first constraint condition includes: a voltage at a load access position is less than or equal to a lower limit of a voltage level;

[0089] The first judgment unit is configured to determine that the first load is a maximum load of the radiation power supply line if the first load is less than or equal to the agreed load of the radiation power supply line.

[0090] Furthermore, it also includes:

[0091] A second calculation unit is configured to calculate a second load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter based on a second constraint condition if the first load is greater than the agreed load of the radiation power supply line; wherein the second constraint condition includes: the voltage at the load access position is less than or equal to the lower limit of the voltage level, and the total load of the radiation power supply line is equal to the agreed load of the radiation power supply line;

[0092] The second judgment unit is used to determine that the second load is the maximum load of the radiation power supply line.

[0093] The embodiment of the device for optimizing the load bearing of a radiation power supply line provided by the present invention can be specifically used to execute the processing flow of the embodiment of the method for optimizing the load bearing of a radiation power supply line in the above embodiment. Its functions will not be repeated here, and reference may be made to the detailed description of the above method embodiment.

[0094] From the above description, it can be seen that the radiation power supply line load carrying optimization device provided in the embodiment of the present invention collects the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; calculates the maximum load of the radiation power supply line according to the line impedance parameters, transformer impedance parameters and power supply impedance parameters; and determines the load capacity that can be connected to the radiation power supply line based on the maximum load. It can ensure that the system voltage level meets the requirements after the load is connected and does not exceed the agreed capacity of the line.

[0095] The present application provides an embodiment of an electronic device for implementing all or part of the content of the method for optimizing the load bearing of a radiation power supply line. The electronic device specifically includes the following content:

[0096] A processor, a memory, a communications interface and a bus; wherein the processor, the memory and the communications interface communicate with each other through the bus; the communications interface is used to realize information transmission between related devices; the electronic device can be a desktop computer, a tablet computer and a mobile terminal, etc., but the present embodiment is not limited thereto. In the present embodiment, the electronic device can be implemented with reference to the embodiment of the method for realizing the optimization of the load bearing of the radiation power supply line and the embodiment of the device for realizing the optimization of the load bearing of the radiation power supply line, and the contents thereof are incorporated herein, and the repeated parts are not repeated.

[0097] Figure 6 FIG. 9 is a schematic block diagram of the system structure of the electronic device 9600 according to an embodiment of the present application. Figure 6 As shown, the electronic device 9600 may include a central processor 9100 and a memory 9140; the memory 9140 is coupled to the central processor 9100. It is worth noting that Figure 6 is exemplary; other types of structures may also be used to supplement or replace this structure to implement telecommunication functions or other functions.

[0098] In one embodiment, the optimization function of the load bearing of the radiation power supply line may be integrated into the central processor 9100. The central processor 9100 may be configured to perform the following control:

[0099] Collect line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line;

[0100] Calculate the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter;

[0101] The load capacity accessible to the radiation power supply line is determined based on the maximum load.

[0102] From the above description, it can be seen that the electronic device provided in the embodiment of the present application collects the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; calculates the maximum load of the radiation power supply line according to the line impedance parameters, the transformer impedance parameters and the power supply impedance parameters; and determines the load capacity that can be connected to the radiation power supply line based on the maximum load. It can ensure that the system voltage level meets the requirements after the load is connected and does not exceed the protocol capacity of the line.

[0103] In another embodiment, the radiation power line load-bearing optimization device can be configured separately from the central processor 9100. For example, the radiation power line load-bearing optimization device can be configured as a chip connected to the central processor 9100, and the radiation power line load-bearing optimization function can be realized through the control of the central processor.

[0104] like Figure 6 As shown, the electronic device 9600 may also include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is worth noting that the electronic device 9600 does not necessarily have to include Figure 6 In addition, the electronic device 9600 may also include Figure 6 For components not shown, reference may be made to the prior art.

[0105] like Figure 6 As shown, the central processing unit 9100 is sometimes also referred to as a controller or an operation control, and may include a microprocessor or other processor device and / or logic device, which receives input and controls the operation of various components of the electronic device 9600.

[0106] The memory 9140 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory or other suitable devices. The above-mentioned information related to the failure may be stored, and a program for executing the relevant information may also be stored. The CPU 9100 may execute the program stored in the memory 9140 to implement information storage or processing, etc.

[0107] The input unit 9120 provides input to the central processing unit 9100. The input unit 9120 is, for example, a key or a touch input device. The power supply 9170 is used to provide power to the electronic device 9600. The display 9160 is used to display display objects such as images and texts. The display may be, for example, an LCD display, but is not limited thereto.

[0108] The memory 9140 may be a solid-state memory, such as a read-only memory (ROM), a random access memory (RAM), a SIM card, etc. It may also be a memory that saves information even when the power is off, can be selectively erased, and is provided with more data, examples of which are sometimes referred to as EPROMs, etc. The memory 9140 may also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application / function storage unit 9142, which is used to store application programs and function programs or processes for executing the operation of the electronic device 9600 through the central processor 9100.

[0109] The memory 9140 may also include a data storage unit 9143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 9144 of the memory 9140 may include various drivers for communication functions of the electronic device and / or for executing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0110] The communication module 9110 is a transmitter / receiver 9110 that sends and receives signals via an antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processor 9100 to provide input signals and receive output signals, which may be the same as the case of a conventional mobile communication terminal.

[0111] Based on different communication technologies, multiple communication modules 9110 may be provided in the same electronic device, such as a cellular network module, a Bluetooth module and / or a wireless LAN module, etc. The communication module (transmitter / receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide an audio output via the speaker 9131 and receive an audio input from the microphone 9132, thereby realizing a common telecommunication function. The audio processor 9130 may include any suitable buffer, decoder, amplifier, etc. In addition, the audio processor 9130 is also coupled to the central processor 9100, so that recording can be performed on the local machine through the microphone 9132, and the sound stored on the local machine can be played through the speaker 9131.

[0112] The embodiment of the present invention also provides a computer-readable storage medium capable of implementing all the steps in the method for optimizing the load bearing of the radiation power supply line in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the method for optimizing the load bearing of the radiation power supply line in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0113] Collect line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line;

[0114] Calculate the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter;

[0115] The load capacity accessible to the radiation power supply line is determined based on the maximum load.

[0116] From the above description, it can be seen that the computer-readable storage medium provided in the embodiment of the present invention collects the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; calculates the maximum load of the radiation power supply line according to the line impedance parameters, the transformer impedance parameters and the power supply impedance parameters; and determines the load capacity that can be connected to the radiation power supply line based on the maximum load. It can ensure that the system voltage level meets the requirements after the load is connected and does not exceed the protocol capacity of the line.

[0117] Although the present invention provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in sequence or in parallel according to the method shown in the embodiments or the drawings (for example, in a parallel processor or multi-threaded processing environment).

[0118] It should be understood by those skilled in the art that the embodiments of this specification may be provided as methods, devices (systems) or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0119] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0120] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0121] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. The present invention is not limited to any single aspect, any single embodiment, or any combination and / or replacement of these aspects and / or embodiments. Moreover, each aspect and / or embodiment of the present invention can be used alone or in combination with one or more other aspects and / or embodiments thereof.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A method for optimizing load bearing of a radiation power supply line, characterized in that: include: Collect line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; Calculate the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; Determine the load capacity that can be connected to the radial power supply line based on the maximum load; The step of calculating the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter comprises: Based on the first constraint condition, the first load of the radiation power supply line is calculated according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the first constraint condition includes: the voltage at the load access position is less than or equal to the lower limit of the voltage level; If the first load is less than or equal to the agreed load of the radiation power supply line, determining the first load as the maximum load of the radiation power supply line; Among them, the radiation power supply line has the following relationship: Among them, R T is the impedance of the transformer, R L is the impedance of the transmission line, j represents the imaginary part, is the voltage vector at the load connection location, is the vector of the power supply system voltage, k is the transformation ratio between the high voltage side and the low voltage side of the transformer; X'0 = X0 / k 2 , X0 is the reactance of the power supply system, X T is the reactance of the transformer, X L is the reactance of the transmission line; is the current vector of the power supply system, S is the load, P is the active power, Q is the reactive power, is the complex conjugate of the current; When calculating, set the voltage U at the load connection location j Equal to the lower limit of the voltage level U set , that is U j =U set ;Change U j =U set Substitute into formula (1) to obtain the current I; then use formula (2) to substitute the current I into formula (2) to obtain the first load S, which is the maximum load under the first constraint condition; Wherein, determining the load capacity accessible to the radiation power supply line based on the maximum load includes: The following formula (3) is used to determine whether the first load S of the radiation power supply line exceeds the agreed load S of the radiation power supply line: set , if the requirement of inequality (3) is met, then the first load S calculated by formula (2) is determined to be the maximum load that the radiation power supply line can carry; 2. The method for optimizing load bearing of a radiation power supply line according to claim 1, characterized in that: Before collecting the line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line, it also includes: Perform transformation ratio reduction processing on the radiation power supply line to obtain the equivalent line of the radiation power supply line; Correspondingly, the collecting of line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line includes: Collect line impedance parameters, transformer impedance parameters and power supply impedance parameters of equivalent lines.

3. The method for optimizing load bearing of a radiation power supply line according to claim 1, characterized in that: Also includes: If the first load is greater than the agreed load of the radiation power supply line, then based on the second constraint condition, the second load of the radiation power supply line is calculated according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the second constraint condition includes: the voltage at the load access location is less than or equal to the lower limit of the voltage level, and the total load of the radiation power supply line is equal to the agreed load of the radiation power supply line; Determining that the second load is the maximum load of the radiation power supply line; Here, let the inequality sign in equation (3) be an equality sign, that is, the total power of the radial power supply line is equal to the agreement capacity S of the radial power supply line. set , Substituting formula (1) and formula (2) into formula (3), we can obtain U j and I, and then use formula (2) to obtain the second load. The calculated second load is the maximum load that can be connected to the radiation power supply line.

4. A device for optimizing load bearing of a radiation power supply line, characterized in that: include: A collection module, used for collecting line impedance parameters, transformer impedance parameters and power supply impedance parameters of the radiation power supply line; A calculation module, used for calculating the maximum load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; An optimization module, used for determining the load capacity accessible to the radial power supply line based on the maximum load; Wherein, the calculation module includes: A first calculation unit is used to calculate a first load of the radiation power supply line based on a first constraint condition according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter; wherein the first constraint condition includes: a voltage at a load access position is less than or equal to a lower limit of a voltage level; a first judging unit, configured to determine that the first load is the maximum load of the radiation power supply line if the first load is less than or equal to the agreed load of the radiation power supply line Among them, the radiation power supply line has the following relationship: Among them, R T is the impedance of the transformer, R L is the impedance of the transmission line, j represents the imaginary part, is the voltage vector at the load connection location, is the vector of the power supply system voltage, k is the transformation ratio between the high voltage side and the low voltage side of the transformer; X'0 = X0 / k 2 , X0 is the reactance of the power supply system, X T is the reactance of the transformer, X L is the reactance of the transmission line; is the current vector of the power supply system, S is the load, P is the active power, Q is the reactive power, is the complex conjugate of the current; When calculating, set the voltage U at the load connection location j Equal to the lower limit of the voltage level U set , that is U j =U set ;Change U j =U set Substitute into formula (1) to obtain the current I; then use formula (2) to substitute the current I into formula (2) to obtain the first load S, which is the maximum load under the first constraint condition; Wherein, the optimization module is specifically used for: The following formula (3) is used to determine whether the first load S of the radiation power supply line exceeds the agreed load S of the radiation power supply line: set , if the requirement of inequality (3) is met, then the first load S calculated by formula (2) is determined to be the maximum load that the radiation power supply line can carry; 5. The device for optimizing load bearing of radiation power supply line according to claim 4, characterized in that: Also includes: A processing module, used for performing transformation ratio reduction processing on the radiation power supply line to obtain an equivalent line of the radiation power supply line; Correspondingly, the acquisition module includes: The acquisition unit is used to acquire line impedance parameters, transformer impedance parameters and power supply impedance parameters of the equivalent line.

6. The device for optimizing load bearing of radiation power supply line according to claim 4, characterized in that: Also includes: A second calculation unit is configured to calculate a second load of the radiation power supply line according to the line impedance parameter, the transformer impedance parameter and the power supply impedance parameter based on a second constraint condition if the first load is greater than the agreed load of the radiation power supply line; wherein the second constraint condition includes: the voltage at the load access position is less than or equal to the lower limit of the voltage level, and the total load of the radiation power supply line is equal to the agreed load of the radiation power supply line; A second judgment unit, used to determine that the second load is the maximum load of the radiation power supply line; Here, let the inequality sign in equation (3) be an equality sign, that is, the total power of the radial power supply line is equal to the agreement capacity S of the radial power supply line. set , Substituting formula (1) and formula (2) into formula (3), we can obtain U j and I, and then use formula (2) to obtain the second load. The calculated second load is the maximum load that can be connected to the radiation power supply line.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method for optimizing the load bearing of the radiation power supply line according to any one of claims 1 to 3 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for optimizing the load bearing of a radiation power line according to any one of claims 1 to 3 are implemented.

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