Power regulation method and device for adjustable source and load in power distribution network, and medium

Abstract

Disclosed in the present invention are a power regulation method and device for an adjustable source and load in a power distribution network and a medium. The method comprises: if the head-end node voltage of the current line in a power distribution network is lower than the lower limit of a compliance range, on the basis of current values and single adjustable values of an adjustable power source and an adjustable load in the current line, adjusting the adjustable power source and the adjustable load, such that the head-end node voltage is within the compliance range; and, if the head-end node voltage is greater than the upper limit of the compliance range, adjusting the adjustable power source on the basis of the current value and the single adjustable value of the adjustable power source, such that the head-end node voltage is within the compliance range. The present invention provides the power regulation method and device for an adjustable source and load in a power distribution network and a medium, which classify the head-end node voltage of the power distribution network into two cases and make a corresponding adjustment on the basis of the adjustable power source and the adjustable load so as to adjust the head-end node voltage to the compliance range to reduce feeder line voltage fluctuations, solving the problem that it is difficult to regulate voltages of feeder lines containing adjustable sources and loads to overcome the problem of large feeder line voltage fluctuations.

Description

A method, device and medium for adjustable source load power regulation in power distribution networks Technical Field

[0001] This invention relates to the technical field of adjustable source load power regulation, and in particular to an adjustable source load power regulation method, device and medium for power distribution networks. Background Technology

[0002] With the increasing number of adjustable power source devices such as distributed power sources and charging piles in the power grid, and these devices mainly connected at the feeder and downstream grid levels, the operating state of feeder voltage is gradually exhibiting randomness and fluctuations. Furthermore, the inherent operating characteristics of these devices mean that voltage regulation equipment such as reactive power compensation alone cannot effectively meet the voltage stability requirements of the feeders. Traditional feeder stability maintenance involves regularly inspecting and maintaining power equipment to ensure its normal operation, and establishing a comprehensive power grid event monitoring and prediction system to monitor key nodes of the power grid in real time, promptly identify potential faults, and perform predictive analysis to reduce the impact of equipment failures on feeder voltage stability.

[0003] However, in traditional feeders, due to the relatively small voltage fluctuations, voltage regulation equipment for feeders with large voltage fluctuations is often not provided. Furthermore, due to the combined effects of various factors such as the characteristics of distributed power sources and charging piles, the influence of grid connection level, the limitations of voltage regulation equipment, the increase in system complexity, and technical challenges, the rapid increase in the number of adjustable source loads connected to the grid can easily lead to large feeder voltage fluctuations, making it difficult to ensure the stability of the grid's own operation. Summary of the Invention

[0004] This invention provides a method, device, and medium for adjusting the power of adjustable source loads in a power distribution network, in order to solve the problem of large voltage fluctuations in feeders containing adjustable source loads.

[0005] Obtain grid connection data of the distribution network;

[0006] According to the grid connection data, if the voltage of the first node of the current line in the distribution network is less than the lower limit of the qualified range, the grid connection power of the adjustable power source and the load of the adjustable load are adjusted according to the current value and single adjustable value of the adjustable power source and the adjustable load in the current line, so that the voltage of the first node is within the qualified range; wherein, the current line includes adjustable source load;

[0007] If the voltage at the first node is greater than the upper limit of the qualified range, the grid-connected power of the adjustable power supply is adjusted according to the current value and the single adjustable value of the adjustable power supply so that the voltage at the first node is within the qualified range.

[0008] This invention categorizes the voltage at the head-end node of the distribution network into two cases and adjusts the voltage using different methods. Since adjustable power supplies can raise the voltage by increasing output and lower the voltage by decreasing output, they can address both the issue of voltage exceeding the lower limit and the issue of voltage exceeding the upper limit. However, because the load is determined by the users, the distribution network cannot actively increase the load; therefore, adjustable loads can only raise the voltage by decreasing the load. Thus, this solution raises the voltage at the head-end node when the voltage is below the lower limit of the acceptable range, bringing it within the acceptable range and ensuring stable feeder voltage. Conversely, it raises the voltage at the head-end node when the voltage is above the upper limit of the acceptable range, also ensuring stable feeder voltage. This case-by-case adjustment maximizes the effectiveness of adjustable power supplies and adjustable loads.

[0009] Compared to existing technologies, this invention divides the voltage at the head node of the distribution network into two cases: one below the lower limit of the qualified range and the other above the upper limit of the qualified range. It then adjusts the voltage at the head node according to the adjustable power source and the adjustable load, thereby reducing feeder voltage fluctuations. This solves the problem of large feeder voltage fluctuations, which is difficult to regulate the voltage of feeders with adjustable source loads.

[0010] As a preferred embodiment, based on the current values ​​and single adjustable values ​​of the adjustable power supply and adjustable load in the current line, the grid-connected power of the adjustable power supply and the load of the adjustable load are adjusted so that the voltage of the first-end node is within the qualified range, specifically:

[0011] If the first adjustable power source in the current line does not meet the first preset condition, the grid-connected power of the first adjustable power source is adjusted to the sum of the current power value of the first adjustable power source and the single adjustable power, and the voltage of the first node is made to be within the qualified range by traversing the adjustable power sources in the distribution network.

[0012] If the first adjustable power supply meets the first preset condition and the first adjustable load in the current line meets the second preset condition, the load of the first adjustable load is adjusted to the difference between the current load value of the first adjustable load and the single adjustable power, and the adjustable loads in the distribution network are traversed to ensure that the voltage of the first node is within the qualified range.

[0013] In this preferred embodiment, when the first adjustable power source does not meet the first preset condition, the grid-connected power of the first adjustable power source is adjusted to the sum of the current power value of the first adjustable power source and the single adjustable power. This maximizes the effectiveness of the first adjustable power source within the range of the single adjustable power. Furthermore, by traversing all adjustable power sources in the distribution network and setting the power value of all adjustable power sources to the maximum value, the voltage at the beginning node of the line is increased, placing it within the qualified range.

[0014] When the first adjustable power supply does not meet the first preset condition and the first adjustable load meets the second preset condition, the load of the first adjustable load is adjusted to the difference between the current load value of the first adjustable load and the single adjustable power. This maximizes the effectiveness of the adjustable load within the range of the single adjustable power. In the distribution network, when the adjustable load reduces its power consumption, the current on the line decreases, which reduces the voltage drop. This means that the voltage drop between the beginning of the line and the load decreases, so the voltage at the beginning node will increase compared to before, thereby increasing the voltage. By traversing the adjustable load, the voltage at the beginning node can be raised to the qualified range.

[0015] As the preferred option, the first preset scenario is as follows:

[0016] Calculate the sum of the current power value and the single adjustable power value of the first adjustable power source to obtain the first power source value;

[0017] The case where the first power value is greater than the maximum power value of the first adjustable power supply is taken as the first preset case.

[0018] In this preferred embodiment, if the sum of the current power value and the single adjustable power of the first adjustable power source is greater than the maximum power value of the first adjustable power source, it indicates that the increaseable output of the first adjustable power source has reached its limit. This situation is set as the first preset situation. This is to determine whether the increaseable output of a single power source has reached its limit and whether it has the ability to increase output further during the process of increasing the voltage by increasing the output of the adjustable power source. If it does not have the ability, the next adjustable power source is adjusted. If it does have the ability, the current adjustable power source is adjusted to maximize its effectiveness.

[0019] As a preferred option, the second preset situation is as follows:

[0020] The first load value is obtained by calculating the difference between the current load value and the single adjustable power of the first adjustable load.

[0021] The case where the first load value is greater than zero is taken as the second preset case.

[0022] In this preferred embodiment, if the difference between the current load value of the first adjustable load and the single adjustable power is greater than zero, it indicates that the increase in output of the first adjustable load has not yet reached its limit. This situation is set as the second preset situation. This is to determine whether the load reduction capability of a single load has reached its limit in the process of increasing voltage by reducing the load, so as to maximize the effectiveness of the adjustable load.

[0023] As a preferred embodiment, the grid-connected power of the adjustable power supply is adjusted based on its current value and a single adjustable value, so that the voltage at the first-end node is within the qualified range. Specifically:

[0024] In the third preset case, the grid-connected power of the first adjustable power supply in the current line is adjusted to the difference between the current power value of the first adjustable power supply and the single adjustable power.

[0025] Traverse the adjustable power sources in the distribution network to ensure that the voltage of the first node is within the qualified range.

[0026] This preferred solution adjusts the grid-connected power of the first adjustable power source to the difference between its current power value and the single adjustable power value. By iterating through all adjustable power sources in the distribution network and setting the power values ​​of all adjustable power sources to their minimum values, the voltage at the beginning of the line is reduced to within the acceptable range. Furthermore, since adjustable power sources can raise the voltage by increasing output and lower the voltage by decreasing output, they can address both the issue of voltage exceeding the lower limit and the issue of voltage exceeding the upper limit by increasing output and decreasing output, respectively.

[0027] As a preferred embodiment, the third preset condition is specifically as follows:

[0028] The difference between the current power value and the single adjustable power value of the first adjustable power supply is calculated to obtain the second power supply value;

[0029] The case where the second power value is greater than zero is taken as the third preset case.

[0030] The present invention also provides an adjustable source-load power regulation device for distribution networks, including a data module, a lower limit adjustment module and an upper limit adjustment module;

[0031] The data module is used to acquire grid connection data of the power distribution network;

[0032] The lower limit adjustment module is used to adjust the grid-connected power of the adjustable power source and the load of the adjustable load based on the current value and single adjustable value of the adjustable power source and adjustable load in the current line, according to the grid connection data, if the voltage of the first node of the current line in the distribution network is less than the lower limit of the qualified range, so that the voltage of the first node is within the qualified range; wherein, the current line includes adjustable source load;

[0033] The upper limit adjustment module is used to adjust the grid-connected power of the adjustable power supply according to the current value and single adjustable value of the adjustable power supply if the voltage of the first-end node is greater than the upper limit of the qualified range, so that the voltage of the first-end node is within the qualified range.

[0034] As a preferred embodiment, the lower limit adjustment module includes a power supply unit and a load unit;

[0035] The power supply unit is configured to, if the first adjustable power supply in the current line does not meet the first preset condition, adjust the grid-connected power of the first adjustable power supply to the sum of the current power value of the first adjustable power supply and the single adjustable power, and make the voltage of the first node within the qualified range by traversing the adjustable power supplies in the distribution network.

[0036] The load unit is configured to, if the first adjustable power supply meets the first preset condition and the first adjustable load in the current line meets the second preset condition, adjust the load of the first adjustable load to the difference between the current load value of the first adjustable load and the single adjustable power, and traverse the adjustable loads in the distribution network to ensure that the voltage of the first-end node is within the qualified range.

[0037] As the preferred option, the first preset scenario is as follows:

[0038] Calculate the sum of the current power value and the single adjustable power value of the first adjustable power source to obtain the first power source value;

[0039] The case where the first power value is greater than the maximum power value of the first adjustable power supply is taken as the first preset case.

[0040] As a preferred option, the second preset situation is as follows:

[0041] The first load value is obtained by calculating the difference between the current load value and the single adjustable power of the first adjustable load.

[0042] The case where the first load value is greater than zero is taken as the second preset case.

[0043] As a preferred embodiment, the upper limit adjustment module includes a difference unit and an adjustment unit;

[0044] The difference unit is used to adjust the grid-connected power of the first adjustable power source in the current line to the difference between the current power value of the first adjustable power source and the single adjustable power under the third preset condition.

[0045] The adjustment unit is used to traverse the adjustable power sources in the distribution network to ensure that the voltage of the first node is within the qualified range.

[0046] As a preferred embodiment, the third preset condition is specifically as follows:

[0047] The difference between the current power value and the single adjustable power value of the first adjustable power supply is calculated to obtain the second power supply value;

[0048] The case where the second power value is greater than zero is taken as the third preset case.

[0049] This application also provides a storage medium storing a computer program, which is called and executed by a computer to implement the adjustable source load power regulation method for a distribution network as described above. Attached Figure Description

[0050] Figure 1 is a flowchart illustrating an adjustable source load power regulation method for a distribution network provided in an embodiment of this application;

[0051] Figure 2 is a schematic diagram of the control process provided in an embodiment of this application;

[0052] Figure 3 is a schematic diagram of the structure of an adjustable source load power regulation device for a power distribution network provided in an embodiment of this application. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "several" means two or more.

[0055] The adjustable source load power regulation method for distribution networks provided in this application embodiment is mainly applied to situations where a large number of adjustable source loads are connected, and it is necessary to achieve autonomous voltage regulation through feeders containing adjustable source loads, thereby reducing large fluctuations in feeder voltage caused by the fluctuations of the adjustable loads themselves and ensuring feeder voltage stability.

[0056] Example 1:

[0057] Please refer to Figure 1. An embodiment of this application provides a method for adjusting the power of a power distribution network, including steps S1 to S3. The specific implementation steps are as follows:

[0058] S1. Obtain grid connection data of the distribution network.

[0059] Step S1 in this embodiment of the application is specifically as follows:

[0060] Obtain grid connection data of the distribution network; wherein, the grid connection data includes the current load value (S) of each adjustable load. lnowj ), single-cycle adjustable power (S) loncej ); the current power value (S) of each adjustable power supply pnowi ), single-cycle adjustable power (S) poncei ) and maximum power value (S) pmaxi It also includes the voltage (U) at the beginning of the current line;

[0061] Based on the grid connection data, the number of adjustable loads connected to the grid is denoted as m, the number of adjustable power sources connected to the grid is denoted as n, and the adjustable loads are numbered LOAD1, LOAD2, ..., LOAD1 in order of distance from the beginning of the line. j ... LOAD m The adjustable power supplies are numbered POWER1, POWER2, ​​..., POWER according to their distance from the beginning of the line. i ... POWER n ;

[0062] Furthermore, j is the current adjustable load number, j∈m; i is the current adjustable power supply number, i∈n.

[0063] S2. Based on the grid connection data, if the voltage of the first node of the current line in the distribution network is less than the lower limit of the qualified range, adjust the grid connection power of the adjustable power source and the load of the adjustable load according to the current value and single adjustable value of the adjustable power source and adjustable load in the current line, so that the voltage of the first node is within the qualified range; wherein, the current line includes adjustable source load.

[0064] Step S2 in this embodiment includes S2.1 to S2.4; wherein, S2.1 is the measure taken when the voltage (U) at the beginning node of the current line is within the acceptable range, S2.2 is the process of setting the first preset situation and the second preset situation, S2.3 is the measure taken to adjust the adjustable power supply when the voltage (U) at the beginning node is less than the lower limit of the acceptable range, and S2.4 is the measure taken to adjust the adjustable load when the voltage (U) at the beginning node is less than the lower limit of the acceptable range, specifically as follows:

[0065] S2.1 According to the grid connection data, if the voltage (U) of the current line's first node is within the qualified range, then this round of the process ends; the qualified range can be manually set, and its default value is [9.3kV, 10.7kV].

[0066] S2.2 Calculate the current power value S of the first adjustable power supply. pnowi and single-time adjustable power S poncei The sum of these values ​​yields the first power supply value;

[0067] The case where the first power supply value is greater than the maximum power value of the first adjustable power supply (S) pnowi +S poncei >S pmaxi This is the first preset case.

[0068] Calculate the current load value S of the first adjustable load. lnowj and single-time adjustable power S loncej The difference is used to obtain the first load value;

[0069] The case where the first load value is greater than zero (S) lnowj -S loncej >0) is the second preset case.

[0070] It should be noted that the first embodiment of this application was completed under the condition that the current line contains adjustable source load.

[0071] In embodiment S2.2 of this application, if the sum of the current power value and the single adjustable power of the first adjustable power supply is greater than the maximum power value of the first adjustable power supply, it indicates that the increaseable output of the first adjustable power supply has reached its limit. This situation is set as the first preset situation. This is to determine whether the increaseable output of a single power supply has reached its limit and whether it has the ability to increase output more during the process of increasing the output of the adjustable power supply to improve the voltage. That is, whether the adjustable power supply can solve the problem of voltage falling below the lower limit by increasing output. If not, the next adjustable power supply is adjusted; if so, the current adjustable power supply is adjusted to maximize the effectiveness of the current adjustable power supply.

[0072] Furthermore, if the difference between the current load value and the single adjustable power of the first adjustable load is greater than zero, it indicates that the increase in output of the first adjustable load has not yet reached its limit. This situation is set as the second preset situation. This is to determine whether the load reduction capability of a single load has reached its limit in the process of increasing voltage by reducing the load, so as to maximize the effectiveness of the adjustable load.

[0073] S2.3 If the voltage (U) at the beginning node of the current line in the distribution network is less than the lower limit of the qualified range, let i = n;

[0074] If the first adjustable power supply POWER in the current line i The first preset condition is not met (i.e., S is satisfied). pnowi +S poncei ≤S pmaxi Then the first adjustable power supply POWER i Grid-connected power S pnowi Adjust to the first adjustable power supply. i Current power value S pnowi and single-time adjustable power S poncei The sum of (i.e., S) pnowi =S pnowi +S poncei ); Obtain the adjusted line start-end node voltage (U0). If it is within the acceptable range, the process ends.

[0075] If the adjusted line start-point node voltage (U0) is not within the acceptable range, then let i = i-1. If i > 0, then according to the first adjustable power supply POWER... i The previous adjustable power supply POWER i-1 Reassess whether the first preset condition is met and make corresponding adjustments. In this way, traverse the adjustable power sources in the distribution network to ensure that the voltage (U) of the first node is within the qualified range, and the current process ends.

[0076] S2.4 After traversing the adjustable power sources in the distribution network (i.e., i≤0), let j=m;

[0077] If the first adjustable power supply POWER i Satisfying the first preset condition (i.e., satisfying S) pnowi +S poncei >S pmaxi And the first adjustable load in the current line LOAD j Satisfying the second preset condition (i.e., satisfying S) lnowj -S loncej If the load is greater than 0, then the first adjustable load will be loaded. j Load S lnowj Adjust to the current load value S of the first adjustable load. lnowjand single-time adjustable power S loncej The difference (i.e., S) lnowj =S lnowj -S loncej ); Obtain the adjusted line start-end node voltage (U1). If it is within the acceptable range, the current process ends.

[0078] If the adjusted line head node voltage (U1) is not within the acceptable range, then let j = j-1. If j > 0, then according to the first adjustable load LOAD... j Previous adjustable load j-1 Reassess whether the second preset condition is met and make corresponding adjustments. In this way, traverse the adjustable loads in the distribution network to ensure that the voltage (U) of the first node is within the qualified range, and the current process ends.

[0079] If the voltage (U) at the first node is still below the lower limit of the acceptable range after both the adjustable power supply and the adjustable load have been adjusted, it is considered that the problem of the voltage falling below the lower limit cannot be solved by the line itself, and the control system will issue an alarm.

[0080] Overall, in embodiment S2 of this application, when the first adjustable power source does not meet the first preset condition, the grid-connected power of the first adjustable power source is adjusted to the sum of the current power value of the first adjustable power source and the single adjustable power. This maximizes the effectiveness of the first adjustable power source within the range of the single adjustable power. By traversing the adjustable power sources in the distribution network, the power values ​​of all adjustable power sources are set to the maximum value, thereby improving the voltage of the first node of the line and placing it within the qualified range.

[0081] When the first adjustable power supply does not meet the first preset condition and the first adjustable load meets the second preset condition, the load of the first adjustable load is adjusted to the difference between the current load value of the first adjustable load and the single adjustable power. This maximizes the effectiveness of the adjustable load within the range of the single adjustable power. In the distribution network, when the adjustable load reduces its power consumption, the current on the line decreases, which reduces the voltage drop. This means that the voltage drop between the beginning of the line and the load decreases, so the voltage at the beginning node will increase compared to before, thereby increasing the voltage. By traversing the adjustable load, the voltage at the beginning node can be raised to the qualified range.

[0082] S3. If the voltage at the first node is greater than the upper limit of the qualified range, adjust the grid-connected power of the adjustable power supply according to the current value and the single adjustable value of the adjustable power supply so that the voltage at the first node is within the qualified range.

[0083] Step S3 in this embodiment includes S3.1 to S3.2; wherein, S3.1 is the process of setting a third preset condition, and S3.2 is the measure taken to adjust the adjustable power supply when the voltage (U) at the first node is greater than the upper limit of the qualified range, specifically as follows:

[0084] S3.1 Calculate the first adjustable power supply POWER i Current power value S pnowi and single-time adjustable power S poncei The difference is used to obtain the second power supply value;

[0085] The case where the second power supply value is greater than zero (i.e., S) pnowi -S poncei >0) is the third preset case.

[0086] In embodiment S3.1 of this application, the difference between the current power value of the first adjustable power supply and the single adjustable power is greater than zero, indicating that the first adjustable power supply is currently in normal working condition and has a certain power reserve or adjustment capability to cope with possible voltage changes. The problem of voltage exceeding the upper limit can be solved by reducing the output power.

[0087] S3.2 If the voltage (U) at the first node is greater than the upper limit of the qualified range, let i = n;

[0088] Under the third preset condition (i.e., satisfying S) pnowi -S poncei >0), the first adjustable power supply POWER in the current line i Grid-connected power S pnowi Adjust to the current power value S of the first adjustable power supply pnowi and single-time adjustable power S poncei The difference (i.e., S) pnowi =S pnowi -S poncei ), obtain the adjusted line start node voltage (U2), and if it is within the qualified range, the process ends;

[0089] If the adjusted line start-up node voltage (U2) is not within the acceptable range, or if the start-up node voltage (U) is greater than the upper limit of the acceptable range and does not meet the third preset condition (i.e., S) pnowi -S poncei If i > 0, then let i = i - 1. If i > 0, then according to the first adjustable power supply POWER... i The previous adjustable power supply POWER i Reassess whether the third preset condition is met and make corresponding adjustments. In this way, traverse the adjustable power sources in the distribution network to ensure that the voltage (U) of the first node is within the qualified range, and the current process ends.

[0090] After all adjustable power supplies have been adjusted (i.e., i≤0), if the voltage (U) at the first node is still greater than the upper limit of the acceptable range, it is considered that the problem of the voltage exceeding the upper limit cannot be solved by the line itself, and the control system will alarm.

[0091] To illustrate the application of the embodiments of this application, the following example demonstrates Embodiment 1 of this application:

[0092] 1. At 12:00 on April 6, 2023, the adjustable source load of a certain feeder needs to be optimized.

[0093] 2. There are 3 adjustable loads and 2 adjustable power supplies for this feeder. The adjustable loads are numbered as LOAD1, LOAD2, and LOAD3 according to their distance from the beginning of the feeder, and the adjustable power supplies are numbered as POWER1 and POWER2.

[0094] 3. Obtain the current load value S for each adjustable load. lnow1 =0.5MW, S lnow2 =1MW, S lnow3 =0.2MW, single adjustable power value S lonce1 =0.1MW, S lonce2 =0.05MW, S lonce3 =0.2MW; Current power value S of each adjustable power source pnow1 =1MW, S pnow2 =2MW, single adjustable power value S ponce1 =0.1MW, S ponce2 =0.05MW, maximum power value S pnow1 =2MW, S pnow2 =2.5MW.

[0095] 4. The current starting voltage is 9.1kV.

[0096] 5. After increasing the adjustable power supply of POWER2 to its maximum power of 2MW, the voltage at the beginning of the feeder was measured to be 9.25kV; then, when the adjustable power supply of POWER1 was increased to 2.4MW, the voltage at the beginning of the feeder was measured to be 9.36kV. This round of the process is now complete.

[0097] In embodiment S3.2 of this application, the grid-connected power of the first adjustable power source is adjusted to the difference between the current power value of the first adjustable power source and the single adjustable power. Furthermore, by traversing all adjustable power sources in the distribution network and setting the power values ​​of all adjustable power sources to their minimum values, the voltage at the beginning node of the line is reduced to within the acceptable range. Moreover, since adjustable power sources can raise the voltage by increasing output and lower the voltage by decreasing output, they can address both the issue of voltage exceeding the lower limit and the issue of voltage exceeding the upper limit by increasing output and decreasing output, respectively.

[0098] To apply the embodiments of this application, please refer to Figure 2. Figure 2 is a schematic diagram of the control process provided by the embodiments of this application, illustrating the process of controlling a feeder voltage in this embodiment. The following is a general description of this process with reference to Figure 2:

[0099] (1) Obtain the number of adjustable loads connected to the grid (m) and the number of adjustable power sources connected to the grid (n), and number the adjustable loads in order of distance from the beginning of the line as LOAD1, LOAD2, ..., LOAD1. j , ..., LOAD m The adjustable power supplies are numbered POWER1, POWER2, ​​..., POWER according to their distance from the beginning of the line. i ... POWER n .

[0100] (2) Obtain the current load value (S) of each adjustable load. lnowj ) and single-cycle adjustable power (S loncej ), j∈m; and obtain the current power value (S) of each adjustable power source. pnowi ), single-cycle adjustable power (S) poncei ) and maximum power value (S) pmaxi ), i∈n.

[0101] (3) Obtain the current line start node voltage (U).

[0102] (4) If the voltage (U) at the beginning of the line is within the acceptable range, the process ends; otherwise, proceed to step (5).

[0103] (5) If the voltage (U) at the beginning of the line is less than the lower limit of the qualified range, proceed to step (6); otherwise proceed to step (16).

[0104] (6) Let i=n.

[0105] (7) If S pnowi +S poncei >S pmaxi If yes, proceed to step (10); otherwise, proceed to step (8).

[0106] (8) The POWER i The grid-connected power of the adjustable power supply is adjusted to S. pnowi =S pnowi +S poncei .

[0107] (9) Obtain the adjusted line start node voltage (U). If it is within the qualified range, the process ends; otherwise, proceed to step (7).

[0108] (10) Let i = i-1. If i > 0, proceed to step (7); otherwise, proceed to step (11).

[0109] (11) Let j = m.

[0110] (12) If S lnowj -S loncej If the value is >0, proceed to step (13); otherwise, proceed to step (15).

[0111] (13) Load the first LOAD j The load adjustment of the adjustable load is S. lnowj =S lnowj -S loncej .

[0112] (14) Obtain the adjusted line start node voltage (U). If it is within the qualified range, the current process ends; otherwise, proceed to step (12).

[0113] (15) Let j = j-1. If j > 0, proceed to step (12). Otherwise, the system will issue an alarm and the current process will end.

[0114] (16) Let i=n.

[0115] (17) If S pnowi -S poncei If the value is >0, proceed to step (18); otherwise, proceed to step (20).

[0116] (18) The POWER i The grid-connected power of the adjustable power supply is adjusted to S. pnowi =S pnowi -S poncei .

[0117] (19) Obtain the adjusted line start node voltage (U). If it is within the qualified range, the current process ends; otherwise, proceed to step (17).

[0118] (20) Let i = i-1. If i > 0, proceed to step (17). Otherwise, the system will issue an alarm and the current process will end.

[0119] Overall, this embodiment has the following beneficial effects:

[0120] This invention categorizes the voltage at the head-end node of a distribution network into two cases and adjusts the voltage using different methods. Since adjustable power supplies can raise the voltage by increasing output and lower it by decreasing output, they can address both the issue of voltage exceeding the lower limit and the issue of voltage exceeding the upper limit. However, because the load is determined by the user, the distribution network cannot actively increase the load; therefore, adjustable loads can only raise the voltage by decreasing the load. Thus, this solution raises the voltage at the head-end node when the voltage is below the lower limit of the acceptable range, bringing it within the acceptable range and ensuring stable feeder voltage. Conversely, it raises the voltage at the head-end node when the voltage is above the upper limit of the acceptable range, also ensuring stable feeder voltage. This case-by-case adjustment maximizes the effectiveness of adjustable power supplies and loads, addressing the difficulty of voltage regulation for feeders with adjustable loads and overcoming large feeder voltage fluctuations.

[0121] Example 2:

[0122] Please refer to Figure 3. An embodiment of this application provides an adjustable source-load power regulation device for a distribution network, including a data module 10, a lower limit adjustment module 20, and an upper limit adjustment module 30.

[0123] Among them, data module 10 is used to acquire grid connection data of the distribution network;

[0124] The lower limit adjustment module 20 is used to adjust the grid-connected power of the adjustable power source and the load of the adjustable load according to the current value and single adjustable value of the adjustable power source and adjustable load in the current line, based on the grid connection data, if the voltage of the first node of the current line in the distribution network is less than the lower limit of the qualified range, so that the voltage of the first node is within the qualified range; wherein, the current line includes adjustable source load.

[0125] The upper limit adjustment module 30 is used to adjust the grid-connected power of the adjustable power supply according to the current value and the single adjustable value of the adjustable power supply if the voltage of the first-end node is greater than the upper limit of the qualified range, so that the voltage of the first-end node is within the qualified range.

[0126] In one embodiment, data module 10 specifically comprises:

[0127] Obtain grid connection data of the distribution network; wherein, the grid connection data includes the current load value (S) of each adjustable load. lnowj ), single-cycle adjustable power (S) loncej ); the current power value (S) of each adjustable power supply pnowi ), single-cycle adjustable power (S) poncei ) and maximum power value (S)pmaxi It also includes the voltage (U) at the beginning of the current line;

[0128] Based on the grid connection data, the number of adjustable loads connected to the grid is denoted as m, the number of adjustable power sources connected to the grid is denoted as n, and the adjustable loads are numbered LOAD1, LOAD2, ..., LOAD1 in order of distance from the beginning of the line. j , ..., LOAD m The adjustable power supplies are numbered POWER1, POWER2, ​​..., POWER according to their distance from the beginning of the line. i ... POWER n ;

[0129] Furthermore, j is the current adjustable load number, j∈m; i is the current adjustable power supply number, i∈n.

[0130] In one embodiment, the lower limit adjustment module 20 includes a qualified unit, a first unit, a second unit, a power supply unit, and a load unit. The qualified unit represents the measures taken when the voltage (U) at the beginning of the current line is within the qualified range. The first and second units represent the process of setting a first preset condition and a second preset condition. The power supply unit represents the measures taken to adjust the adjustable power supply when the voltage (U) at the beginning of the line is less than the lower limit of the qualified range. The load unit represents the measures taken to adjust the adjustable load when the voltage (U) at the beginning of the line is less than the lower limit of the qualified range. Specifically:

[0131] The qualified unit is used to determine the end of the current process if the voltage (U) of the first node of the current line is within the qualified range based on the grid connection data. The qualified range can be manually set, and its default value is [9.3kV, 10.7kV].

[0132] The first unit is used to calculate the current power value S of the first adjustable power supply. pnowi and single-time adjustable power S poncei The sum of these values ​​yields the first power supply value;

[0133] The first unit is also used to handle cases where the first power supply value is greater than the maximum power value of the first adjustable power supply (S). pnowi +S poncei >S pmaxi This is the first preset case.

[0134] The second unit is used to calculate the current load value S of the first adjustable load. lnowj and single-time adjustable power S loncej The difference is used to obtain the first load value;

[0135] The second unit is also used to handle cases where the first load value is greater than zero (S). lnowj -Sloncej >0) is the second preset case.

[0136] It should be noted that Embodiment 2 of this application was completed under the condition that the current line contains adjustable source load.

[0137] In the first and second units of the embodiments of this application, if the sum of the current power value and the single adjustable power of the first adjustable power supply is greater than the maximum power value of the first adjustable power supply, it indicates that the increaseable output of the first adjustable power supply has reached its limit. This situation is set as the first preset situation. This is to determine whether the increaseable output of a single power supply has reached its limit and whether it has the ability to increase output more during the process of increasing the output of the adjustable power supply to improve the voltage. That is, whether the adjustable power supply can solve the problem of voltage falling below the lower limit by increasing output. If not, the next adjustable power supply is adjusted; if so, the current adjustable power supply is adjusted to maximize its effectiveness.

[0138] Furthermore, if the difference between the current load value and the single adjustable power of the first adjustable load is greater than zero, it indicates that the increase in output of the first adjustable load has not yet reached its limit. This situation is set as the second preset situation. This is to determine whether the load reduction capability of a single load has reached its limit in the process of increasing voltage by reducing the load, so as to maximize the effectiveness of the adjustable load.

[0139] The power supply unit is used to set i = n if the voltage (U) at the beginning node of the current line in the distribution network is less than the lower limit of the qualified range.

[0140] The power supply unit is also used to provide the first adjustable power supply POWER in the current line. i The first preset condition is not met (i.e., S is satisfied). pnowi +S poncei ≤S pmaxi Then the first adjustable power supply POWER i Grid-connected power S pnowi Adjust to the first adjustable power supply. i Current power value S pnowi and single-time adjustable power S poncei The sum of (i.e., S) pnowi =S pnowi +S poncei ); Obtain the adjusted line start-end node voltage (U0). If it is within the acceptable range, the process ends.

[0141] The power supply unit is also used to, if the adjusted line start-end node voltage (U0) is not within the acceptable range, set i = i-1; if i > 0, then according to the first adjustable power supply POWER... i The previous adjustable power supply POWER i-1Reassess whether the first preset condition is met and make corresponding adjustments. In this way, traverse the adjustable power sources in the distribution network to ensure that the voltage (U) of the first node is within the qualified range, and the current process ends.

[0142] The load unit is used to set j = m after traversing the adjustable power sources in the distribution network (i.e., i ≤ 0);

[0143] The load unit is also used if the first adjustable power supply POWER i Satisfying the first preset condition (i.e., satisfying S) pnowi +S poncei >S pmaxi And the first adjustable load in the current line LOAD j Satisfying the second preset condition (i.e., satisfying S) lnowj -S loncej If the load is greater than 0, then the first adjustable load will be loaded. j Load S lnowj Adjust to the current load value S of the first adjustable load. lnowj and single-time adjustable power S loncej The difference (i.e., S) lnowj =S lnowj -S loncej ); Obtain the adjusted line start-end node voltage (U1). If it is within the acceptable range, the current process ends.

[0144] The load unit is also used to determine if the adjusted line head node voltage (U1) is not within the acceptable range, in which case j = j-1, and if j > 0, then according to the first adjustable load LOAD... j Previous adjustable load j-1 Reassess whether the second preset condition is met and make corresponding adjustments. In this way, traverse the adjustable loads in the distribution network to ensure that the voltage (U) of the first node is within the qualified range, and the current process ends.

[0145] The load unit is also used to determine if, after both the adjustable power supply and the adjustable load have been adjusted, the voltage (U) at the first end node is still below the lower limit of the acceptable range. If so, it is assumed that the problem of the voltage falling below the lower limit cannot be resolved by the line itself, and the control system will issue an alarm.

[0146] Overall, in this application embodiment, when the first adjustable power supply does not meet the first preset condition, the lower limit adjustment module 20 adjusts the grid-connected power of the first adjustable power supply to the sum of the current power value of the first adjustable power supply and the single adjustable power. This maximizes the effectiveness of the first adjustable power supply within the range of the single adjustable power. By traversing the adjustable power supplies in the distribution network, the power values ​​of all adjustable power supplies are set to the maximum value, thereby improving the voltage of the first node of the line and placing it within the qualified range.

[0147] When the first adjustable power supply does not meet the first preset condition and the first adjustable load meets the second preset condition, the load of the first adjustable load is adjusted to the difference between the current load value of the first adjustable load and the single adjustable power. This maximizes the effectiveness of the adjustable load within the range of the single adjustable power. In the distribution network, when the adjustable load reduces its power consumption, the current on the line decreases, which reduces the voltage drop. This means that the voltage drop between the beginning of the line and the load decreases, so the voltage at the beginning node will increase compared to before, thereby increasing the voltage. By traversing the adjustable load, the voltage at the beginning node can be raised to the qualified range.

[0148] In one embodiment, the upper limit adjustment module 30 includes a third unit, a difference unit, and an adjustment unit; wherein, the third unit is the process of setting a third preset condition, and the difference unit and the adjustment unit are measures taken to adjust the adjustable power supply when the voltage (U) at the first terminal node is greater than the upper limit of the qualified range, specifically:

[0149] The third unit is used to calculate the first adjustable power supply POWER. i Current power value S pnowi and single-time adjustable power S poncei The difference is used to obtain the second power supply value;

[0150] The third unit is also used to handle cases where the second power supply value is greater than zero (i.e., S). pnowi -S poncei >0) is the third preset case.

[0151] In the third unit of this application embodiment, the difference between the current power value of the first adjustable power supply and the single adjustable power is greater than zero, indicating that the first adjustable power supply is currently in normal working condition and has a certain power reserve or adjustment capability to cope with possible voltage changes. The problem of voltage exceeding the upper limit can be solved by reducing the output power.

[0152] The difference unit is used to set i = n if the voltage (U) at the first node is greater than the upper limit of the qualified range;

[0153] The difference unit is also used in the third preset case (i.e., satisfying S). pnowi -S poncei >0), the first adjustable power supply POWER in the current line i Grid-connected power S pnowi Adjust to the current power value S of the first adjustable power supply pnowi and single-time adjustable power S poncei The difference (i.e., S) pnowi =S pnowi -S poncei ), obtain the adjusted line start node voltage (U2), and if it is within the qualified range, the process ends;

[0154] The adjustment unit is used if the adjusted line head node voltage (U2) is not within the acceptable range, or if the head node voltage (U) is greater than the upper limit of the acceptable range and does not meet the third preset condition (i.e., S). pnowi -S poncei If i > 0, then let i = i - 1. If i > 0, then according to the first adjustable power supply POWER... i The previous adjustable power supply POWER i Reassess whether the third preset condition is met and make corresponding adjustments. In this way, traverse the adjustable power sources in the distribution network to ensure that the voltage (U) of the first node is within the qualified range, and the current process ends.

[0155] The adjustment unit is used to determine if, after all adjustable power supplies have been adjusted (i.e., i≤0), the voltage (U) at the first node is still greater than the upper limit of the acceptable range. If so, it is considered that the problem of the voltage exceeding the upper limit cannot be solved by the line itself, and the control system will alarm.

[0156] To illustrate the application of the embodiments of this application, the following example demonstrates Embodiment Two of this application:

[0157] 1. At 12:00 on April 6, 2023, the adjustable source load of a certain feeder needs to be optimized.

[0158] 2. There are 3 adjustable loads and 2 adjustable power supplies for this feeder. The adjustable loads are numbered as LOAD1, LOAD2, and LOAD3 according to their distance from the beginning of the feeder, and the adjustable power supplies are numbered as POWER1 and POWER2.

[0159] 3. Obtain the current load value S for each adjustable load. lnow1 =0.5MW, S lnow2 =1MW, S lnow3 =0.2MW, single adjustable power value S lonce1 =0.1MW, S lonce2 =0.05MW, S lonce3 =0.2MW; Current power value S of each adjustable power source pnow1 =1MW, S pnow2 =2MW, single adjustable power value S ponce1 =0.1MW, S ponce2 =0.05MW, maximum power value S pnow1 =2MW, S pnow2 =2.5MW.

[0160] 4. The current starting voltage is 9.1kV.

[0161] 5. After increasing the adjustable power supply of POWER2 to its maximum power of 2MW, the voltage at the beginning of the feeder was measured to be 9.25kV; then, when the adjustable power supply of POWER1 was increased to 2.4MW, the voltage at the beginning of the feeder was measured to be 9.36kV. This round of the process is now complete.

[0162] In this embodiment, the difference unit and adjustment unit adjust the grid-connected power of the first adjustable power source to the difference between the current power value of the first adjustable power source and the single adjustable power. Furthermore, by traversing all adjustable power sources in the distribution network and setting the power values ​​of all adjustable power sources to their minimum values, the voltage at the beginning node of the line is reduced to within the acceptable range. Moreover, since adjustable power sources can raise the voltage by increasing output and lower the voltage by decreasing output, they can address both the issue of voltage exceeding the lower limit and the issue of voltage exceeding the upper limit by increasing output and decreasing output, respectively.

[0163] To apply the embodiments of this application, please refer to Figure 2. Figure 2 is a schematic diagram of the control process provided by the embodiments of this application, showing the process of controlling the feeder voltage in Embodiment 2. The following is a general description of this process with reference to Figure 2:

[0164] (1) Obtain the number of adjustable loads connected to the grid (m) and the number of adjustable power sources connected to the grid (n), and number the adjustable loads in order of distance from the beginning of the line as LOAD1, LOAD2, ..., LOAD j ... LOAD m The adjustable power supplies are numbered POWER1, POWER2, ​​..., POWER according to their distance from the beginning of the line. i ... POWER n .

[0165] (2) Obtain the current load value (S) of each adjustable load. lnowj ) and single-cycle adjustable power (S loncej ), j∈m; and obtain the current power value (S) of each adjustable power source. pnowi ), single-cycle adjustable power (S) poncei ) and maximum power value (S) pmaxi ), i∈n.

[0166] (3) Obtain the current line start node voltage (U).

[0167] (4) If the voltage (U) at the beginning of the line is within the acceptable range, the process ends; otherwise, proceed to step (5).

[0168] (5) If the voltage (U) at the beginning of the line is less than the lower limit of the qualified range, proceed to step (6); otherwise proceed to step (16).

[0169] (6) Let i=n.

[0170] (7) If S pnowi +S poncei >S pmaxi If yes, proceed to step (10); otherwise, proceed to step (8).

[0171] (8) The POWER i The grid-connected power of the adjustable power supply is adjusted to S. pnowi =S pnowi +S poncei .

[0172] (9) Obtain the adjusted line start node voltage (U). If it is within the qualified range, the process ends; otherwise, proceed to step (7).

[0173] (10) Let i = i-1. If i > 0, proceed to step (7); otherwise, proceed to step (11).

[0174] (11) Let j = m.

[0175] (12) If S lnowj -S loncej If the value is >0, proceed to step (13); otherwise, proceed to step (15).

[0176] (13) Load the first LOAD j The load adjustment of the adjustable load is S. lnowj =S lnowj -S loncej .

[0177] (14) Obtain the adjusted line start node voltage (U). If it is within the qualified range, the current process ends; otherwise, proceed to step (12).

[0178] (15) Let j = j-1. If j > 0, proceed to step (12). Otherwise, the system will issue an alarm and the current process will end.

[0179] (16) Let i=n.

[0180] (17) If S pnowi -S poncei If the value is >0, proceed to step (18); otherwise, proceed to step (20).

[0181] (18) The POWER i The grid-connected power of the adjustable power supply is adjusted to S. pnowi =S pnowi -S poncei .

[0182] (19) Obtain the adjusted line start node voltage (U). If it is within the qualified range, the current process ends; otherwise, proceed to step (17).

[0183] (20) Let i = i-1. If i > 0, proceed to step (17). Otherwise, the system will issue an alarm and the current process will end.

[0184] Overall, this embodiment has the following beneficial effects:

[0185] This invention categorizes the voltage at the head-end node of a distribution network into two cases and adjusts the voltage using different methods. Since adjustable power supplies can raise the voltage by increasing output and lower it by decreasing output, they can address both the issue of voltage exceeding the lower limit and the issue of voltage exceeding the upper limit. However, because the load is determined by the user, the distribution network cannot actively increase the load; therefore, adjustable loads can only raise the voltage by decreasing the load. Thus, this solution raises the voltage at the head-end node when the voltage is below the lower limit of the acceptable range, bringing it within the acceptable range and ensuring stable feeder voltage. Conversely, it raises the voltage at the head-end node when the voltage is above the upper limit of the acceptable range, also ensuring stable feeder voltage. This case-by-case adjustment maximizes the effectiveness of adjustable power supplies and loads, addressing the difficulty of voltage regulation for feeders with adjustable loads and overcoming large feeder voltage fluctuations.

[0186] Example 3:

[0187] This application provides a computer-readable storage medium, which includes a stored computer program, wherein the computer program controls the device where the computer-readable storage medium is located to execute the aforementioned adjustable source load power regulation method for a power distribution network when it is running.

[0188] The adjustable source-load power regulation method for power distribution networks, when implemented as a software functional unit and used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0189] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for adjusting source-load power control in a distribution network, characterized in that, include: Obtain grid connection data of the distribution network; According to the grid connection data, if the voltage of the first node of the current line in the distribution network is less than the lower limit of the qualified range, the grid connection power of the adjustable power source and the load of the adjustable load are adjusted according to the current value and single adjustable value of the adjustable power source and the adjustable load in the current line, so that the voltage of the first node is within the qualified range; wherein, the current line includes adjustable source load; If the voltage at the first node is greater than the upper limit of the qualified range, the grid-connected power of the adjustable power supply is adjusted according to the current value and the single adjustable value of the adjustable power supply so that the voltage at the first node is within the qualified range.

2. The adjustable source-load power regulation method for a distribution network as described in claim 1, characterized in that, Based on the current and single-adjustment values ​​of the adjustable power supply and adjustable load in the current line, adjust the grid-connected power of the adjustable power supply and the load of the adjustable load so that the voltage of the first-end node is within the qualified range, specifically: If the first adjustable power source in the current line does not meet the first preset condition, the grid-connected power of the first adjustable power source is adjusted to the sum of the current power value of the first adjustable power source and the single adjustable power, and the voltage of the first node is made to be within the qualified range by traversing the adjustable power sources in the distribution network. If the first adjustable power supply meets the first preset condition and the first adjustable load in the current line meets the second preset condition, the load of the first adjustable load is adjusted to the difference between the current load value of the first adjustable load and the single adjustable power, and the adjustable loads in the distribution network are traversed to ensure that the voltage of the first node is within the qualified range.

3. The adjustable source-load power regulation method for a distribution network as described in claim 2, characterized in that, The first presupposition is as follows: Calculate the sum of the current power value and the single adjustable power value of the first adjustable power source to obtain the first power source value; The case where the first power value is greater than the maximum power value of the first adjustable power supply is taken as the first preset case.

4. The adjustable source-load power regulation method for a distribution network as described in claim 2, characterized in that, The second preset situation is as follows: The first load value is obtained by calculating the difference between the current load value and the single adjustable power of the first adjustable load. The case where the first load value is greater than zero is taken as the second preset case.

5. The adjustable source-load power regulation method for a distribution network as described in claim 1, characterized in that, The grid-connected power of the adjustable power supply is adjusted based on its current value and single adjustable value to ensure that the voltage at the first-end node is within the acceptable range. Specifically: In the third preset case, the grid-connected power of the first adjustable power source in the current line is adjusted to the difference between the current power value of the first adjustable power source and the single adjustable power. Traverse the adjustable power sources in the distribution network to ensure that the voltage of the first node is within the qualified range.

6. The adjustable source-load power regulation method for a distribution network as described in claim 5, characterized in that, The third preset condition is as follows: The difference between the current power value and the single adjustable power value of the first adjustable power supply is calculated to obtain the second power supply value; The case where the second power value is greater than zero is taken as the third preset case.

7. A power control device for adjustable source-load in a power distribution network, characterized in that, It includes a data module, a lower limit adjustment module, and an upper limit adjustment module; The data module is used to acquire grid connection data of the distribution network; The lower limit adjustment module is used to adjust the grid-connected power of the adjustable power source and the load of the adjustable load based on the current value and single adjustable value of the adjustable power source and adjustable load in the current line, according to the grid connection data, if the voltage of the first node of the current line in the distribution network is less than the lower limit of the qualified range, so that the voltage of the first node is within the qualified range; wherein, the current line includes adjustable source load; The upper limit adjustment module is used to adjust the grid-connected power of the adjustable power supply according to the current value and single adjustable value of the adjustable power supply if the voltage of the first-end node is greater than the upper limit of the qualified range, so that the voltage of the first-end node is within the qualified range.

8. The adjustable source-load power regulation device for a distribution network as described in claim 7, characterized in that, The lower limit adjustment module includes a power supply unit and a load unit; The power supply unit is configured to, if the first adjustable power supply in the current line does not meet the first preset condition, adjust the grid-connected power of the first adjustable power supply to the sum of the current power value of the first adjustable power supply and the single adjustable power, and make the voltage of the first node within the qualified range by traversing the adjustable power supplies in the distribution network. The load unit is configured to, if the first adjustable power supply meets the first preset condition and the first adjustable load in the current line meets the second preset condition, adjust the load of the first adjustable load to the difference between the current load value of the first adjustable load and the single adjustable power, and traverse the adjustable loads in the distribution network to ensure that the voltage of the first-end node is within the qualified range.

9. The adjustable source-load power regulation device for a distribution network as described in claim 8, characterized in that, The first presupposition is as follows: Calculate the sum of the current power value and the single adjustable power value of the first adjustable power source to obtain the first power source value; The case where the first power value is greater than the maximum power value of the first adjustable power supply is taken as the first preset case.

10. The adjustable source-load power regulation device for a distribution network as described in claim 8, characterized in that, The second preset situation is as follows: The first load value is obtained by calculating the difference between the current load value and the single adjustable power of the first adjustable load. The case where the first load value is greater than zero is taken as the second preset case.

11. The adjustable source-load power regulation device for a distribution network as described in claim 7, characterized in that, The upper limit adjustment module includes a difference unit and an adjustment unit; The difference unit is used to adjust the grid-connected power of the first adjustable power source in the current line to the difference between the current power value of the first adjustable power source and the single adjustable power under the third preset condition. The adjustment unit is used to traverse the adjustable power sources in the distribution network to ensure that the voltage of the first node is within the qualified range.

12. The adjustable source-load power regulation device for a distribution network as described in claim 11, characterized in that, The third preset condition is as follows: The difference between the current power value and the single adjustable power value of the first adjustable power supply is calculated to obtain the second power supply value; The case where the second power value is greater than zero is taken as the third preset case.

13. A storage medium, characterized in that, The storage medium stores a computer program, which is called and executed by a computer to implement any one of the adjustable source load power regulation methods for distribution networks as described in claims 1 to 6.

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