Method and device for determining regulation capability boundary of power regulation device in power distribution network

Abstract

The invention provides a method and device for determining the regulation capability boundary of a power regulation device in a power distribution network, and relates to the field of electrical engineering and the field of power equipment regulation. The method comprises the steps of obtaining a power distribution network topology; processing the outflow voltage of the outflow node, the inflow voltage of the inflow node, the line impedance of the interconnection line and the maximum compensation voltage of the power regulation device node based on a line current limiting condition to obtain a node voltage phase difference value boundary of the inflow node; processing the inflow voltage, the outflow voltage and different node voltage phase difference values in the node voltage phase difference value boundary based on a node power expression in response to the condition that the node voltage phase difference value boundary meets a preset flexible access condition, and obtaining a power regulation range of the power regulation device; and determining an adjustment capability boundary of the power adjustment device based on the power adjustment range.

Description

Technical Field

[0001] The present disclosure relates to the fields of electrical engineering and power equipment regulation, and more specifically, to a method, device, electronic device, and readable storage medium for determining a regulation capability boundary of a power regulation device in a distribution network. Background Art

[0002] As the operation of distribution networks presents a rapidly increasing complexity, traditional distribution networks are difficult to operate stably when dealing with dynamic loads and power supply fluctuations. In particular, as the penetration rate of distributed energy devices in distribution networks continues to increase, there are problems in distribution networks such as difficulty in mutual assistance between power equipment, insufficient power transfer capacity, and reduced power supply reliability. Summary of the invention

[0003] In view of this, the present disclosure provides a method, a device, an electronic device, and a readable storage medium for determining a regulation capability boundary of a power regulation device in a power distribution network.

[0004] One aspect of the present disclosure provides a method for determining a regulation capability boundary of a power regulation device in a distribution network, comprising: obtaining a distribution network topology, wherein the distribution network topology comprises interconnected lines, power regulation device nodes, outflow nodes and inflow nodes; processing an outflow voltage of the outflow node, an inflow voltage of the inflow node, a line impedance of the interconnected line and a maximum compensation voltage of the power regulation device node based on a line current limiting condition to obtain a node voltage phase difference value boundary of the inflow node, wherein the line current limiting condition indicates that when the power regulation device injects a maximum compensation voltage, the line current of the interconnected line is less than a preset current value, and the node voltage phase difference value boundary indicates a phase interval of a phase difference value between an outflow voltage phase of the outflow node and an inflow voltage phase of the inflow node; in response to the node voltage phase difference value boundary satisfying a preset flexible access condition, processing the inflow voltage and the outflow voltage, as well as different node voltage phase difference values ​​in the node voltage phase difference value boundary based on a node power expression to obtain a power regulation range of the power regulation device; and determining the regulation capability boundary of the power regulation device based on the power regulation range.

[0005] Another aspect of the present disclosure provides a device for determining the regulation capability boundary of a power regulation device in a distribution network, including: an acquisition module, used to acquire the distribution network topology, wherein the distribution network topology includes interconnected lines, power regulation device nodes, outflow nodes and inflow nodes; a first acquisition module, used to process the outflow voltage of the outflow node, the inflow voltage of the inflow node, the line impedance of the interconnected line and the maximum compensation voltage of the power regulation device node based on the line current limiting condition, to obtain the node voltage phase difference value boundary of the inflow node, wherein the line current limiting condition represents that when the power regulation device injects the maximum compensation voltage, the The line current of the interconnected line is less than a preset current value, and the node voltage phase difference value boundary represents the phase interval of the phase difference value between the outflow voltage phase of the outflow node and the inflow voltage phase of the inflow node; a power regulation range acquisition module is used to respond to the node voltage phase difference value boundary satisfying the preset flexible access condition, and process the inflow voltage and the outflow voltage, as well as different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the node power expression to obtain the power regulation range of the power regulation device; and a first determination module is used to determine the regulation capability boundary of the power regulation device based on the power regulation range.

[0006] Another aspect of the present disclosure provides an electronic device, including: one or more processors; and a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method as described above.

[0007] Another aspect of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the above method when executed.

[0008] Another aspect of the present disclosure provides a computer program product, which includes computer executable instructions, and when the instructions are executed, are used to implement the method as described above.

[0009] According to an embodiment of the present disclosure, the node voltage phase difference value boundary is determined by utilizing the line current limiting condition to process the outflow voltage, the inflow voltage and the line impedance, and when the node voltage phase difference value boundary satisfies the preset flexible access condition, the node power expression is utilized to process the inflow voltage and the outflow voltage, as well as different node voltage phase difference values ​​in the node voltage phase difference value boundary to determine the power regulation range of the power regulation device. The power regulation capability range of the power compensation device in the distribution network topology can be analyzed more accurately. By determining the regulation capability boundary according to the power regulation range, the device capacity can be set more accurately according to the regulation capability boundary to avoid the configuration of too large a capacity of the power compensation device, thereby improving the operating stability and power supply quality of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0011] Figure 1 An exemplary system architecture to which a method for determining a regulation capability boundary of a power regulation device in a power distribution network can be applied according to an embodiment of the present disclosure is schematically shown;

[0012] Figure 2 A flow chart schematically shows a method for determining a regulation capability boundary of a power regulation device in a power distribution network according to an embodiment of the present disclosure;

[0013] Figure 3 A schematic diagram schematically shows a distribution network topology according to an embodiment of the present disclosure;

[0014] Figure 4 A node power regulation capability curve diagram according to an embodiment of the present disclosure is schematically shown;

[0015] Figure 5 A schematic diagram schematically shows a distribution network topology according to another embodiment of the present disclosure;

[0016] Figure 6 A schematic diagram schematically shows a node power regulation capability curve diagram according to another embodiment of the present disclosure;

[0017] Figure 7 A schematic diagram schematically shows a node power regulation capability curve diagram according to another embodiment of the present disclosure;

[0018] Figure 8 A block diagram schematically shows a device for determining a regulation capability boundary of a power regulation device in a power distribution network according to an embodiment of the present disclosure; and

[0019] Fig. 9A block diagram of an electronic device suitable for implementing a method for determining a regulation capability boundary of a power regulation device in a power distribution network according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0020] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0021] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0022] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0023] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0024] In the embodiments of the present disclosure, the collection, updating, analysis, processing, use, transmission, provision, disclosure, storage, etc. of the data involved (for example, including but not limited to user personal information) are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information, network security, and national security.

[0025] In the embodiments of the present disclosure, the user's authorization or consent is obtained before obtaining or collecting the user's personal information.

[0026] The inventors found that although the flexible interconnected regulating devices in the distribution network have strong power flow control capabilities, their high cost makes large-scale deployment difficult. This not only limits its scope of application in the distribution network, but also puts the distribution network operating costs under great pressure. At the same time, the flexible interconnected regulating devices in the distribution network usually have a large capacity, and the power regulation capacity boundaries of power regulating devices such as hybrid transformers in the distribution network are not clear. It is difficult to accurately adjust the operating parameters of the power compensation device during the operation of the distribution network to provide stable power supply to the user side, resulting in a lot of waste of the capacity of the regulating device. The higher capacity also increases the operating cost of the distribution network.

[0027] The embodiment of the present disclosure provides a method, device, electronic device and readable storage medium for determining the regulation capability boundary of a power regulation device in a distribution network. The method for determining the regulation capability boundary of a power regulation device in a distribution network includes: obtaining a distribution network topology, wherein the distribution network topology includes interconnected lines, power regulation device nodes, outflow nodes and inflow nodes; processing the outflow voltage of the outflow node, the inflow voltage of the inflow node, the line impedance of the interconnected line and the maximum compensation voltage of the power regulation device node based on the line current limiting condition, and obtaining the node voltage phase difference value boundary of the inflow node, the line current limiting condition characterizing that the line current of the interconnected line is less than the preset current value when the power regulation device injects the maximum compensation voltage, and the node voltage phase difference value boundary characterizing the phase interval of the phase difference value between the outflow voltage phase of the outflow node and the inflow voltage phase of the inflow node; in response to the node voltage phase difference value boundary satisfying the preset flexible access condition, processing the inflow voltage and the outflow voltage based on the node power expression, and different node voltage phase difference values ​​in the node voltage phase difference value boundary, and obtaining the power regulation range of the power regulation device; and determining the regulation capability boundary of the power regulation device based on the power regulation range.

[0028] According to an embodiment of the present disclosure, the node voltage phase difference value boundary is determined by utilizing the line current limiting condition to process the outflow voltage, the inflow voltage and the line impedance, and when the node voltage phase difference value boundary satisfies the preset flexible access condition, the node power expression is utilized to process the inflow voltage and the outflow voltage, as well as different node voltage phase difference values ​​in the node voltage phase difference value boundary to determine the power regulation range of the power regulation device. The power regulation capability range of the power compensation device in the distribution network topology can be analyzed more accurately. By determining the regulation capability boundary according to the power regulation range, the device capacity can be set more accurately according to the regulation capability boundary to avoid the configuration of too large a capacity of the power compensation device, thereby improving the operating stability and power supply quality of the distribution network.

[0029] It should be noted that in order to clearly illustrate the method for determining the regulation capability boundary of a power regulation device in a distribution network provided in an embodiment of the present disclosure, the technical terms involved in the embodiment of the present disclosure may be explained with reference to the following symbols.

[0030] , indicating that the voltage amplitude of the outflow voltage at the outflow node is V i , the outflow voltage phase is 0. , indicating that the voltage amplitude of the inflow voltage flowing into the node is V j , the inflow voltage phase is δ. It should be understood that in the embodiment of the present disclosure, the outflow voltage phase is 0°, and the inflow voltage phase is δ, so δ can also represent the node voltage phase difference value between the outflow node i and the inflow node j.

[0031] , which means that the voltage amplitude of the compensation voltage injected into the interconnection line by the power conditioning device (such as a hybrid transformer) is V C , the compensation voltage phase is θ. is the interconnection line current; I ij is the interconnection line current value, φ is the interconnection line current phase. i +wQ i and P j +wQ j are the outflow power into node i and the inflow power into node j respectively. C +wQ C The compensation power injected into the interconnection line by the power conditioning device node. i , P j and P C Respectively represent active power, Q i , Q j and Q C They represent reactive power and w represents the imaginary part coefficient.

[0032] R and X are the equivalent resistance and equivalent reactance of the interconnection lines respectively.

[0033] Figure 1 The exemplary system architecture of the method for determining the regulation capability boundary of a power regulation device in a power distribution network according to an embodiment of the present disclosure is schematically shown. It should be noted that: Figure 1 What is shown is merely an example of a system architecture to which the embodiments of the present disclosure can be applied, in order to help those skilled in the art understand the technical content of the present disclosure, but it does not mean that the embodiments of the present disclosure cannot be used in other devices, systems, environments or scenarios.

[0034] like Figure 1As shown, the system architecture 100 according to this embodiment may include a first terminal device 101, a second terminal device 102, a third terminal device 103, a network 104, and a server 105. The network 104 is used to provide a medium for a communication link between the first terminal device 101, the second terminal device 102, the third terminal device 103, and the server 105. The network 104 may include various connection types, such as wired and / or wireless communication links, etc.

[0035] The user may use the first terminal device 101, the second terminal device 102, and the third terminal device 103 to interact with the server 105 through the network 104 to receive or send messages, etc. Various communication client applications may be installed on the first terminal device 101, the second terminal device 102, and the third terminal device 103, such as shopping applications, web browser applications, search applications, instant messaging tools, email clients, and / or social platform software, etc. (only for example).

[0036] The first terminal device 101, the second terminal device 102, and the third terminal device 103 may be various electronic devices having display screens and supporting web browsing, including but not limited to smart phones, tablet computers, laptop computers, desktop computers, and the like.

[0037] The server 105 may be a server that provides various services, such as a background management server (only as an example) that provides support for websites browsed by users using the first terminal device 101, the second terminal device 102, and the third terminal device 103. The background management server may analyze and process the received data such as user requests, and feed back the processing results (such as web pages, information, or data obtained or generated according to user requests) to the terminal device.

[0038] It should be noted that the method for determining the regulation capability boundary of the power regulation device in the distribution network provided by the embodiment of the present disclosure can generally be executed by the server 105. Accordingly, the device for determining the regulation capability boundary of the power regulation device in the distribution network provided by the embodiment of the present disclosure can generally be set in the server 105. The method for determining the regulation capability boundary of the power regulation device in the distribution network provided by the embodiment of the present disclosure can also be executed by a server or server cluster that is different from the server 105 and can communicate with the first terminal device 101, the second terminal device 102, the third terminal device 103 and / or the server 105. Accordingly, the device for determining the regulation capability boundary of the power regulation device in the distribution network provided by the embodiment of the present disclosure can also be set in a server or server cluster that is different from the server 105 and can communicate with the first terminal device 101, the second terminal device 102, the third terminal device 103 and / or the server 105. Alternatively, the method for determining the regulation capability boundary of the power regulation device in the distribution network provided by the embodiment of the present disclosure may also be performed by the first terminal device 101, the second terminal device 102, or the third terminal device 103, or may also be performed by other terminal devices different from the first terminal device 101, the second terminal device 102, or the third terminal device 103. Accordingly, the device for determining the regulation capability boundary of the power regulation device in the distribution network provided by the embodiment of the present disclosure may also be provided in the first terminal device 101, the second terminal device 102, or the third terminal device 103, or may be provided in other terminal devices different from the first terminal device 101, the second terminal device 102, or the third terminal device 103.

[0039] It should be understood that Figure 1 The number of terminal devices, networks and servers in the embodiment is only for illustration. Any number of terminal devices, networks and servers may be provided according to the implementation requirements.

[0040] Figure 2 A flow chart of a method for determining a regulation capability boundary of a power regulation device in a power distribution network according to an embodiment of the present disclosure is schematically shown.

[0041] like Figure 2 As shown, the method for determining the regulation capability boundary of a power regulation device in a power distribution network in this embodiment includes operations S210 to S240.

[0042] In operation S210 , a distribution network topology is acquired.

[0043] In operation S220, the outflow voltage of the power outflow node, the inflow voltage of the power inflow node, the line impedance of the interconnected line and the maximum compensation voltage of the power conditioning device node are processed based on the line current limiting condition to obtain the node voltage phase difference value boundary of the inflow node.

[0044] In operation S230, in response to the node voltage phase difference value boundary satisfying the preset flexible access condition, the inflow voltage and the outflow voltage, as well as different node voltage phase difference values ​​in the node voltage phase difference value boundary are processed based on the node power expression to obtain the power regulation range of the power regulation device.

[0045] In operation S240 , based on the power adjustment range, an adjustment capability boundary of the power adjustment device is determined.

[0046] According to an embodiment of the present disclosure, the distribution network topology includes interconnected lines, power conditioning device nodes, power outflow nodes, and power inflow nodes. The outflow node can represent a node that provides power to the interconnected line, and the inflow node can represent a node that obtains power from the interconnected line. For example, the outflow node can represent a power generation device, and the inflow node can represent a user-side node. It should be noted that the direction of power transfer between the electrically connected outflow node and the inflow node is from the outflow node to the inflow node, and it is not used to limit the outflow node to an electrical equipment node for power generation.

[0047] According to an embodiment of the present disclosure, a power conditioning device node may represent a power conditioning device disposed between an outflow node and an inflow node, the power conditioning device being used to regulate the electric power flowing into the inflow node. The power conditioning device node includes a hybrid transformer node. The hybrid transformer node represents a hybrid transformer disposed in a distribution network.

[0048] In one example, the hybrid transformer can be a Sen transformer (Sen transformer, or ST). By constructing a distribution network topology including a Sen transformer, the Sen transformer can be flexibly interconnected with the power equipment nodes in the distribution network, and the power flow control of the distribution network system can be achieved based on the tap control mechanism and thyristor compensation mechanism, thereby improving the operating stability and efficiency of the distribution network.

[0049] It should be noted that the power regulator node can also represent other types of power regulators, such as large-capacity fully controlled power electronic devices, etc. The embodiments of the present disclosure do not limit the specific device type of the power regulator represented by the power regulator node, as long as it can regulate the electric power flowing into the node.

[0050] Figure 3 A schematic diagram of a power distribution network topology according to an embodiment of the present disclosure is schematically shown.

[0051] like Figure 3 As shown, the distribution network topology 300 can be simplified as Figure 3The circuit diagram shown. The distribution network topology 300 includes an outflow node N210, a power conditioning device node N230 and an outflow node N220. The outflow node N210, the power conditioning device node N230 and the outflow node N220 are electrically connected through an interconnection line. The outflow node N210, the power conditioning device node N230 and the outflow node N220 represent the AC system i, the hybrid transformer and the AC system j in the distribution network respectively.

[0052] , indicating that the voltage amplitude of the outflow voltage of the outflow node N210 is V i , the outflow voltage phase is 0. , indicating that the voltage amplitude of the voltage flowing into the node N220 is V j , the inflow voltage phase is δ. It should be understood that in the embodiment of the present disclosure, the outflow voltage phase is 0°, and the inflow voltage phase is δ, so δ can also represent the node voltage phase difference value between the outflow node i and the inflow node j.

[0053] , which means that the voltage amplitude of the compensation voltage injected into the interconnection line by the power conditioning device node N230 (such as a hybrid transformer) is V C , the compensation voltage phase is θ. Among them, , compensation voltage The direction of can be the same as or opposite to the direction of the voltage flowing out of the node N210.

[0054] It should be noted that Figure 3 The power conditioning device node N230 shown includes a primary winding N231 connected in parallel with the AC system i and the AC system j, and a secondary winding N232 connected in series with the AC system i and the AC system j.

[0055] is the interconnection line current; I ij is the interconnection line current value, φ is the interconnection line current phase. i +wQ i and P j +wQ j are the outflow power into node i and the inflow power into node j respectively. C +wQ C The compensation power injected into the interconnection line by the power conditioning device node. i , P j and P C Represent active power, Q i , Q j and Q C They represent reactive power and w represents the imaginary part coefficient.

[0056] R and X are the equivalent resistance and equivalent reactance of the interconnection lines respectively.

[0057] It should be noted that the method for determining the adjustment capability boundary of the power adjustment device in the distribution network provided in the embodiment of the present disclosure can refer to Figure 3 The symbols shown are used to explain the technical terms involved in the embodiments of the present disclosure, and the embodiments of the present disclosure are not described in detail here.

[0058] According to an embodiment of the present disclosure, the line current limiting condition represents that when the power regulating device injects the maximum compensation voltage, the line current of the interconnected line is less than the preset current value. The node voltage phase difference value boundary represents the phase interval of the phase difference value between the outflow voltage phase out of the node and the inflow voltage phase into the node.

[0059] In one example, the line current limiting condition can be expressed as the following formula (1).

[0060] (1);

[0061] The preset flexible access condition can be expressed as the following formula (2).

[0062] (2);

[0063] Where δ represents the node voltage phase difference between the outflow voltage phase and the inflow voltage phase, I max is the maximum rated line current of the interconnected lines, The voltage amplitude of the maximum compensation voltage injected into the interconnection line by the power conditioning device, Z represents the impedance of the interconnection line, for example, Z=R 2 +X 2 In this example, the preset current value of the interconnected line may be the maximum rated line current. By calculating multiple different inflow voltages and outflow voltages in formula (1) through operation, multiple node voltage phase difference values ​​satisfying formula (2) may be obtained. In this way, the node voltage phase difference value boundary may be determined based on the difference value range formed by the calculated multiple node voltage phase difference values.

[0064] It should be understood that the preset flexible access condition may also constrain the voltage amplitudes of the outflow voltage and the inflow voltage to satisfy the condition of the above formula (2).

[0065] In one example, when a power conditioning device is used to realize flexible interconnection with a distribution network, it is necessary to first insert a voltage with the same amplitude and opposite direction as the voltage difference between the two lines in the connection point line through a series transformer to realize soft connection in advance, so that the current of the interconnected line is adjusted in a smaller current range, and then the injected compensation voltage is adjusted to the target value according to the optimization requirements. Therefore, the maximum line current obtained after the maximum compensation voltage is injected can be set to 0, and the node voltage phase difference value is used as the preset flexible interconnection condition for realizing flexible interconnection. At this time, the ability of the power conditioning device to adjust the active power to the inflow node at the front end of the phase angle is limited. The line current limiting condition and the preset flexible interconnection condition can be expressed based on formulas (3) and (4) respectively. Thus, the hybrid transformer as a power conditioning device can play a flexible power regulation role.

[0066] (3);

[0067] (4);

[0068] According to an embodiment of the present disclosure, a node power expression can represent the functional relationship between the inflow voltage, outflow voltage, compensation voltage and node voltage phase difference value, and the node power. The node power determined based on the functional relationship can be at least one of the outflow power, inflow power and compensation power. The node power expression is used to process different inflow voltages, outflow voltages, compensation voltages and node voltage phase difference values ​​to obtain multiple node powers. And based on the multiple node powers, the power regulation range of the power regulation device for the outflow node or the inflow node in the distribution network under different compensation voltage conditions is determined.

[0069] According to an embodiment of the present disclosure, determining the adjustment capability boundary of the power adjustment device based on the power adjustment range may include using the power adjustment range as the adjustment capability boundary. However, it is not limited to this, and a power adjustment boundary map or a power adjustment boundary table may be generated based on the power adjustment range to facilitate querying or browsing the power adjustment range, so as to obtain the adjustment capability of the power adjustment device more quickly, thereby improving the operation stability and operation efficiency of the distribution network.

[0070] According to the method for determining the regulation capability boundary of the power regulation device in the distribution network provided by the embodiment of the present disclosure, the power regulation capability of the voltage-compensated power regulation equipment in the flexible interconnection of the distribution network can be quantitatively characterized, avoiding focusing on the optimization of the distribution network topology to transform the distribution network, and improving the optimization efficiency and optimization accuracy of the distribution network topology, thereby improving the systematic evaluation of the regulation capability of the power equipment in the distribution network in actual operation and giving full play to the operation potential of the power equipment.

[0071] In one example, the outflow node parameters, inflow node parameters and interconnection line parameters set in the distribution network, and the input of the distribution network load access location and size can be used to construct the distribution network topology.

[0072] The hybrid transformer can be connected to the topology of the distribution network, where the primary winding of the hybrid transformer is connected in parallel to the interconnection line, and the excitation voltage is provided by the parallel side node (or inflow node) in the interconnection line. The secondary winding of the hybrid transformer is connected in series to the interconnection line to provide a series compensation voltage. After AC chopping voltage regulation, the hybrid transformer can provide compensation voltage to the interconnection line with a specific compensation voltage amplitude and an arbitrary voltage phase angle between the outflow node and the inflow node connected at both ends, thereby realizing voltage compensation and power regulation between the interconnection lines of the distribution network.

[0073] In one example, taking the A phase voltage of the hybrid transformer as an example, the compensation voltage component obtained by the primary winding transformer and the AC chopper circuit on the parallel side is , and It can be expressed by formula group (5).

[0074] (5);

[0075] In formula (5), k a1 , k b3 , k c2 are the voltage regulation coefficients of the hybrid transformer A phase voltage, and the voltage magnitude is determined by the transformer ratio on the parallel side and the duty cycle of the AC chopper circuit. The compensation voltages of the hybrid transformer B and C phases can be deduced in the same way. The compensation voltage injected into the interconnected line by the hybrid transformer can be expressed as formula (6).

[0076] (6);

[0077] in, are the three-phase voltages of the secondary winding on the series side of the hybrid transformer, They are the three-phase voltages of the primary windings on the parallel side; , and They are the compensation voltage components obtained by the parallel transformer and the AC chopper circuit from the three-phase voltages A, B, and C. The compensation voltage components of the hybrid transformer are adjustable in amplitude at each component, and the phase difference is 120°.

[0078] According to the embodiments of the present disclosure, when the voltage phase angles of the nodes at both ends of the hybrid transformer differ too much, the current of the interconnected line still exceeds the limit after the primary winding on the series side of the hybrid transformer injects the maximum compensation voltage in the opposite direction into the interconnected line. For safety reasons, the flexible interconnection of the hybrid transformer cannot be achieved at this time. When , the functional relationship between the compensation voltage and the interconnection line current can be expressed based on the following combination of formulas (7) and (8).

[0079] (7);

[0080] (8);

[0081] in, and are the real and imaginary parts of the interconnection line current respectively.

[0082] Further rearranging formulas (7) and (8) can determine the expression of the interconnection line current as formula (9).

[0083] (9);

[0084] Based on formula (9), in order to realize flexible interconnection of hybrid transformers, the current in the interconnected line after injecting the reverse maximum compensation voltage cannot exceed the maximum line current I max , so the line current limiting condition can be determined based on formula (9) and expressed as formula (1).

[0085] According to an embodiment of the present disclosure, the node power expression includes an outflow power expression and an inflow power expression. The outflow power expression characterizes the functional relationship between the compensation voltage parameter of the power regulation device and the outflow power flowing out of the node. The inflow power expression characterizes the functional relationship between the compensation voltage parameter of the power regulation device and the inflow power flowing into the node.

[0086] In one example, the outflow power expression and the inflow power expression can be expressed based on the following formulas (10) and (11), respectively.

[0087] (10);

[0088] (11);

[0089] According to an embodiment of the present disclosure, processing the inflow voltage and the outflow voltage based on the node power expression, and different node voltage phase difference values ​​in the node voltage phase difference value boundary, to obtain the power regulation range of the power regulation device may include: processing the inflow voltage V based on the outflow power expression and the inflow power expressioni and the outflow voltage V j , and different node voltage phase difference values ​​δ in the node voltage phase difference value boundary, obtain the outflow power and inflow power corresponding to the node voltage phase difference value; and based on the outflow power and inflow power, determine the node power adjustment range of the power compensation device under the target node voltage condition.

[0090] According to an embodiment of the present disclosure, the target node voltage condition characterizes the outflow voltage corresponding to the outflow power, and the outflow voltage corresponding to the outflow power. The outflow voltage corresponding to the outflow power can be understood as the associated outflow power and the outflow voltage, for example, it can be understood as the outflow voltage set to obtain the preset outflow power. Correspondingly, the inflow voltage corresponding to the inflow power can be understood as the associated inflow power and the inflow voltage, for example, it can be understood as the inflow voltage set to obtain the preset inflow power.

[0091] In one example, the target voltage condition may be understood as a set target outflow voltage and a set target inflow voltage.

[0092] In one example, the inflow voltage V may be processed based on the above formulas (10) and (11): i and the outflow voltage V j , and the different node voltage phase difference values ​​δ in the node voltage phase difference value boundary, as well as the resistance R and reactance X of the interconnection line, to obtain the compensation voltage parameter V set C The corresponding inflow power and outflow power.

[0093] According to an embodiment of the present disclosure, by determining different compensation voltage parameters V C Corresponding to the inflow power and outflow power, a hybrid transformer can be constructed as a power compensation device under different compensation voltage parameters V C The power compensation device is determined based on the difference between the outflow power and the inflow power under different compensation voltage parameters V C conditions, and the node power regulation range under multiple set inflow voltage or outflow voltage conditions.

[0094] In one example, for an outflow node i, the outflow power direction of the outflow node is taken as positive, and the outflow power P output by the outflow node i is i +wQ i It can be expressed as formula (12) and (13).

[0095] (12);

[0096] (13);

[0097] Formulas (12) and (13) can be further used to obtain the relationship between the outflow power output from the outflow node i and the compensation voltage and the compensation voltage phase as shown in formula (10).

[0098] In one example, for an inflow node j, the inflow power direction of the inflow node j is taken as positive, and the outflow power P output from the inflow node j is j +wQ j It can be expressed as formula (14) and (15).

[0099] (14);

[0100] (15);

[0101] Formulas (14) and (15) can be further sorted out to obtain the relationship between the inflow power into node j and the compensation voltage and the compensation voltage phase as shown in formula (11).

[0102] According to an embodiment of the present disclosure, the node power expression also includes a compensation power expression, which characterizes the functional relationship between the compensation voltage parameter of the power regulation device node and the compensation power of the power regulation device node.

[0103] In one example, the compensation power expression can be expressed as formula (16)

[0104] (16);

[0105] According to an embodiment of the present disclosure, the power regulation range of the power regulation device is obtained by processing the incoming voltage and the outgoing voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the node power expression, including: processing the incoming voltage and the outgoing voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the compensation power expression, to obtain the compensation power regulation range of the power regulation device.

[0106] According to an embodiment of the present disclosure, the compensation power adjustment range may include a power range of the compensation power that the power adjustment device can inject into the interconnection line.

[0107] In one example, for the power conditioning device, the direction of the injected grid power is taken as positive, and the compensation power P C +wQ C and compensation voltage parameter V C The relationship between can be expressed as formula (17) and (18).

[0108] (17);

[0109] (18);

[0110] Further rearranging formulas (17) and (18) yields the relationship between the compensation power injected into the interconnected line in series by the hybrid transformer as a power regulation device and the compensation voltage and compensation voltage phase as shown in formula (16).

[0111] According to an embodiment of the present disclosure, based on the power adjustment range, determining the adjustment capability boundary of the power adjustment device may include: determining a node power adjustment capability curve graph based on the node power adjustment range and at least one node power difference value. The node power difference value may represent the power difference between the inflow node and the outflow node. Alternatively, the node power difference value may represent the compensation power of the power compensation device.

[0112] In one example, the active power difference between the inflow node and the outflow node, and the reactive power difference between the inflow node and the outflow node may be represented.

[0113] Figure 4 A node power regulation capability curve diagram according to an embodiment of the present disclosure is schematically shown.

[0114] like Figure 4 As shown, the voltage difference between the outgoing voltage and the incoming voltage is , and δ=-0.5°, the node power regulation capability curves of different power compensation devices are as follows Figure 4 As shown. The horizontal axis represents the active power regulation amount of the power compensation device, that is, the active power in the compensation power provided by the power compensation device. The vertical axis represents the reactive power regulation amount of the power compensation device, that is, the reactive power in the compensation power provided by the power compensation device. Among them, the first closed boundary L411 represents the node power regulation capability boundary curve of the back-to-back voltage source converter (B2B VSC) as a power regulation device, and the second closed boundary L412 represents the node power regulation capability boundary curve of the hybrid transformer as a power regulation device; TCST represents the node power regulation point of the dual-core Sen transformer (Two Core Sen Transformer).

[0115] According to an embodiment of the present disclosure, the method for determining the regulation capability boundary of a power regulation device in a distribution network also includes: processing the maximum compensation voltage, inflow voltage, outflow voltage and node voltage phase difference value boundaries based on the maximum apparent power expression to obtain the maximum apparent power; and determining the regulation capability attribute of the power regulation device node based on the regulation power difference value between the maximum apparent power and the inflow power.

[0116] According to an embodiment of the present disclosure, the regulation capability attribute represents the difference between the capacity of the power regulation device and the inflow power regulation range.

[0117] According to an embodiment of the present disclosure, the capacity of the power conditioning device can be expressed based on the maximum apparent power of the power conditioning device. The inflow power regulation range can be expressed as the variation range of the inflow power during the operation of the power conditioning device.

[0118] According to the embodiments of the present disclosure, in addition to the impedance loss of the interconnected lines, after the power regulation device such as the hybrid transformer is introduced into the distribution network, the power change between the outflow node and the inflow node can be composed of two parts: active power and reactive power. The active power injected into the interconnected lines through the hybrid transformer is always less than the overall regulation amount of the final compensation power. The difference between the maximum apparent power and the inflow power is related to the voltage amplitude of the compensation voltage, the compensation voltage phase angle, the interconnected line impedance and the node voltage phase difference value, which enables the hybrid transformer to have the ability to achieve a larger range of inflow power regulation with a smaller equipment capacity.

[0119] In one example, the adjustment capability attribute d can be expressed as formula (19).

[0120] (19);

[0121] The adjustment capability attribute d can be determined based on the following formula (20).

[0122] (20);

[0123] in, It represents the maximum apparent power, which can be understood as the capacity of the power conditioning device. It indicates the adjustment range of the inflow power, which can be understood as the variation range of the inflow power.

[0124] According to an embodiment of the present disclosure, when the adjustment capability attribute d is less than or equal to 0, the relationship between the inflow voltage, the outflow voltage, the maximum compensation voltage and the node voltage phase difference value boundary can be obtained, satisfying the condition shown in formula (21).

[0125] (twenty one);

[0126] If the distribution network feeder nodes connected to the hybrid transformer meet the voltage phase critical conditions shown in the above formula (21), the hybrid transformer can meet the power mutual assistance requirements of the distribution network system based on a smaller capacity. As the node phase difference and voltage difference between the outflow node and the inflow node decrease, the maximum power range that can be adjusted by the hybrid transformer with the same equipment capacity will gradually increase, and the hybrid transformer's characteristic of adjusting from small to large will become more prominent.

[0127] According to an embodiment of the present disclosure, the method for determining the regulation capability boundary of a power regulation device in a distribution network further includes: updating the access position of a topological node in the distribution network topology in response to the node voltage phase difference value boundary not satisfying a preset flexible access condition.

[0128] According to an embodiment of the present disclosure, a topological node includes at least one of the following: an inflow node, an outflow node, and a power regulating device node.

[0129] According to an embodiment of the present disclosure, when the boundary of the node voltage phase difference value does not meet the preset flexible access condition, the access position of the topological node can be updated so that the preset flexible access condition can be met in the updated distribution network topology, so as to efficiently design and characterize the adjustment capability of the power compensation device and improve the operating efficiency of the distribution network.

[0130] Figure 5 A schematic diagram of a power distribution network topology according to another embodiment of the present disclosure is schematically shown.

[0131] Figure 6 A schematic diagram of a node power regulation capability curve diagram according to another embodiment of the present disclosure is schematically shown.

[0132] Figure 7 A schematic diagram of a node power regulation capability curve diagram according to yet another embodiment of the present disclosure is schematically shown.

[0133] Combination Figures 5 to 7 As shown, the computing power distribution network topology 500 may include 21 topological nodes numbered 1 to 21, and the 21 topological nodes may be represented as nodes 1 to 21. In order to verify the effectiveness of the method provided in the embodiment of the present disclosure, verification is performed based on the distribution network system corresponding to the computing power distribution network topology 500. The voltage reference of the distribution network system is 10.5 kV, and the structure of the distribution network system is as follows: Figure 5As shown in the computing power distribution network topology 500 in . Before the hybrid transformer is connected to the distribution network system, the voltage amplitude of the outflow voltage of node 7 is 1.036, the outflow voltage phase is -0.295°, and the voltage amplitude of the inflow voltage of node 16 is 1.036, and the inflow voltage phase is -0.295°. If a hybrid transformer is installed between node 7 and node 16 to realize flexible interconnection between feeders, the interconnection line impedance is 0.729+w2.0484Ω, the maximum line current limit of the interconnection line is set to 866A, and the maximum voltage compensation coefficient of the hybrid transformer is set to 0.1. By executing the method provided in the embodiment of the present disclosure, the critical value of the node voltage phase difference value boundary between node 7 and node 16 that meets the preset flexible interconnection conditions can be obtained as 17.8°. Among them, PV represents a photovoltaic output node, and WT represents a wind output node. Node 1 and node 11 can represent power station nodes.

[0134] Further, according to formula (21) in the above embodiment, the phase difference critical value for achieving power mutual assistance between interconnected line feeders can be calculated to be 5.4°. The above critical value calculation results are all greater than the actual node phase difference value of 1.7° between node 7 and node 16, indicating that the hybrid transformer can be safely connected between node 7 and node 16 and can play a power regulation role.

[0135] Based on the above hybrid transformer access conditions, when the maximum voltage regulation coefficient of the hybrid transformer is 0.1, the power regulation capacity of the hybrid transformer under different voltage amplitudes and phase angles is shown in Table 1. The load access location and load power size of the user end are shown in Table 2, and the network parameters of the computing power distribution network topology 500 are shown in Table 3.

[0136] Table 1 Power regulation capability of hybrid transformer under different voltage amplitude and phase angle conditions

[0137]

[0138] Table 2 Load access location and size

[0139]

[0140] Table 3 Distribution network topology network line parameters

[0141]

[0142] like Figure 5The first boundary line L611, the second boundary line L612, the third boundary line L613, the fourth boundary line L614 and the fifth boundary line L615 shown represent the node power regulation capability boundary curves of the hybrid transformer when the voltage difference between the inflow voltage and the outflow voltage is 0.02 kV, 0.03 kV, 0.04 kV, 0.05 kV and 0.06 kV respectively.

[0143] like Figure 5 The sixth boundary line L711, the seventh boundary line L712, the eighth boundary line L713, the ninth boundary line L714 and the tenth boundary line L715 shown represent the node power regulation capability boundary curves of the hybrid transformer when the node voltage phase difference values ​​between the incoming voltage phase and the outgoing voltage phase are 3°, 1.5°, 0.03°, -1.5° and -3° respectively.

[0144] According to the embodiments of the present disclosure, when the voltage between the inflow node and the outflow node on both sides connected to the hybrid transformer meets the preset flexible interconnection conditions, the hybrid transformer can adjust the power flow between the connected feeders within its operating range, and has the ability to achieve a larger range of power regulation for the inflow node with a smaller hybrid transformer capacity, which provides a quantitative analysis method for the application of hybrid transformers in the flexible interconnection of distribution networks, helps to reasonably utilize the cost advantages of semi-controlled flexible interconnection equipment, and promotes the comprehensive flexible construction of distribution networks.

[0145] Figure 8 A block diagram of a device for determining a regulation capability boundary of a power regulation device in a power distribution network according to an embodiment of the present disclosure is schematically shown.

[0146] like Figure 8 As shown, the device 800 for determining the regulation capability boundary of a power regulation device in a power distribution network includes an acquisition module 810 , a first acquisition module 820 , a power regulation range acquisition module 830 and a first determination module 840 .

[0147] An acquisition module 810 is used to acquire a distribution network topology, wherein the distribution network topology includes interconnected lines, power conditioning device nodes, power outflow nodes, and power inflow nodes;

[0148] A first obtaining module 820 is used to process the outflow voltage of the power outflow node, the inflow voltage of the power inflow node, the line impedance of the interconnected line and the maximum compensation voltage of the power conditioning device node based on the line current limiting condition to obtain the node voltage phase difference value boundary of the inflow node, the line current limiting condition indicates that when the power conditioning device injects the maximum compensation voltage, the line current of the interconnected line is less than the preset current value, and the node voltage phase difference value boundary indicates the phase interval of the phase difference value between the outflow voltage phase of the outflow node and the inflow voltage phase of the inflow node;

[0149] A power regulation range obtaining module 830 is used to obtain a power regulation range of the power regulating device by processing the inflow voltage and the outflow voltage and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the node power expression in response to the node voltage phase difference value boundary satisfying the preset flexible access condition; and

[0150] The first determination module 840 is configured to determine a limit of an adjustment capability of the power adjustment device based on the power adjustment range.

[0151] According to an embodiment of the present disclosure, the node power expression includes an outflow power expression and an inflow power expression. The outflow power expression characterizes the functional relationship between the compensation voltage parameter of the power regulation device and the outflow power flowing out of the node. The inflow power expression characterizes the functional relationship between the compensation voltage parameter of the power regulation device and the inflow power flowing into the node.

[0152] According to an embodiment of the present disclosure, the power adjustment range obtaining module 830 includes: a first processing unit and a first determining unit.

[0153] The first processing unit is used to process the inflow voltage and the outflow voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the outflow power expression and the inflow power expression, and obtain the outflow power and the inflow power corresponding to the node voltage phase difference value.

[0154] The first determination unit is used to determine the node power adjustment range of the power compensation device in the target node voltage condition based on the outflow power and the inflow power, wherein the target node voltage condition represents the outflow voltage corresponding to the outflow power and the outflow voltage corresponding to the outflow power.

[0155] According to an embodiment of the present disclosure, the first determining module 840 includes a second determining unit.

[0156] The second determining unit is used to determine a node power adjustment capability curve diagram based on the node power adjustment range and at least one node power difference value.

[0157] According to an embodiment of the present disclosure, the node power expression also includes a compensation power expression, which characterizes the functional relationship between the compensation voltage parameter of the power regulation device node and the compensation power of the power regulation device node.

[0158] According to an embodiment of the present disclosure, the power adjustment range obtaining module 830 includes a first obtaining unit.

[0159] The first obtaining unit is used to process the inflow voltage and the outflow voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the compensation power expression to obtain the compensation power adjustment range of the power adjustment device.

[0160] According to an embodiment of the present disclosure, the device 800 for determining the regulation capability boundary of a power regulation device in a power distribution network further includes: a maximum apparent power obtaining module and a regulation capability attribute determining module.

[0161] The maximum apparent power acquisition module is used to process the maximum compensation voltage, the inflow voltage, the outflow voltage and the node voltage phase difference value boundary based on the maximum apparent power expression to obtain the maximum apparent power.

[0162] The regulation capability attribute determination module is used to determine the regulation capability attribute of the power regulation device node based on the regulation power difference value between the maximum apparent power and the inflow power, and the regulation capability attribute represents the difference between the capacity of the power regulation device and the inflow power regulation range.

[0163] According to an embodiment of the present disclosure, the power conditioning device node includes a hybrid transformer node.

[0164] According to an embodiment of the present disclosure, the device 800 for determining the regulation capability boundary of a power regulation device in a power distribution network further includes an updating module.

[0165] An updating module is used to update the access position of a topological node in a distribution network topology in response to a node voltage phase difference value boundary not satisfying a preset flexible access condition, wherein the topological node includes at least one of the following: an inflow node, an outflow node, and a power regulating device node.

[0166] According to the embodiments of the present invention, any one or more of the modules, units, and sub-units, or at least part of the functions of any one of them, can be implemented in one module. According to the embodiments of the present invention, any one or more of the modules, units, and sub-units can be split into multiple modules for implementation. According to the embodiments of the present invention, any one or more of the modules, sub-modules, units, and sub-units can be at least partially implemented as hardware circuits, such as field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), systems on chips, systems on substrates, systems on packages, application-specific integrated circuits (ASICs), or can be implemented by hardware or firmware in any other reasonable way of integrating or packaging circuits, or can be implemented in any one of the three implementation methods of software, hardware, and firmware, or in any appropriate combination of any of them. Alternatively, according to the embodiments of the present invention, one or more of the modules, units, and sub-units can be at least partially implemented as computer program modules, and when the computer program modules are run, the corresponding functions can be performed.

[0167] It should be noted that the device part for determining the regulation capability boundary of the power regulation device in the distribution network in the embodiment of the present disclosure corresponds to the method part for determining the regulation capability boundary of the power regulation device in the distribution network in the embodiment of the present disclosure, and the specific reference numbers in the description of the device part for determining the regulation capability boundary of the power regulation device in the distribution network are used for the method part for determining the regulation capability boundary of the power regulation device in the distribution network, which will not be repeated here.

[0168] Fig. 9 A block diagram of an electronic device suitable for implementing a method for determining a regulation capability boundary of a power regulation device in a power distribution network according to an embodiment of the present disclosure is schematically shown. Fig. 9 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0169] like Fig. 9 As shown, the electronic device 900 according to an embodiment of the present disclosure includes a processor 901, which can perform various appropriate actions and processes according to the program stored in () ROM (read-only memory) 902 or the program loaded from the storage part 908 to the RAM (random access memory) 903. The processor 901 may include, for example, a general-purpose microprocessor (such as a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (for example, an application-specific integrated circuit (ASIC)), etc. The processor 901 may also include an on-board memory for caching purposes. The processor 901 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present disclosure.

[0170] In RAM 903, various programs and data required for the operation of electronic device 900 are stored. Processor 901, ROM 902 and RAM 903 are connected to each other via bus 904. Processor 901 performs various operations of the method flow according to the embodiment of the present disclosure by executing the program in ROM 902 and / or RAM 903. It should be noted that the program can also be stored in one or more memories other than ROM 902 and RAM 903. Processor 901 can also perform various operations of the method flow according to the embodiment of the present disclosure by executing the program stored in the one or more memories.

[0171] According to an embodiment of the present disclosure, the electronic device 900 may further include an input / output (I / O) interface 905, which is also connected to the bus 904. The electronic device 900 may further include one or more of the following components connected to the input / output (I / O) interface 905: an input portion 906 including a keyboard, a mouse, etc.; an output portion 907 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 908 including a hard disk, etc.; and a communication portion 909 including a network interface card such as a LAN card, a modem, etc. The communication portion 909 performs communication processing via a network such as the Internet. A drive 910 is also connected to the input / output (I / O) interface 905 as needed. A removable medium 911, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 910 as needed, so that a computer program read therefrom is installed into the storage portion 908 as needed.

[0172] According to an embodiment of the present disclosure, the method flow according to an embodiment of the present disclosure can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 909, and / or installed from the removable medium 911. When the computer program is executed by the processor 901, the above-mentioned functions defined in the system of the embodiment of the present disclosure are executed. According to an embodiment of the present disclosure, the system, equipment, device, module, unit, etc. described above can be implemented by a computer program module.

[0173] The present disclosure also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiments; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present disclosure is implemented.

[0174] According to an embodiment of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium. For example, it may include, but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, apparatus, or device.

[0175] For example, according to an embodiment of the present disclosure, the computer-readable storage medium may include the ROM 902 and / or the RAM 903 described above and / or one or more memories other than the ROM 902 and the RAM 903 .

[0176] An embodiment of the present disclosure also includes a computer program product, which includes a computer program, which contains program code for executing the method provided by the embodiment of the present disclosure. When the computer program product is run on an electronic device, the program code is used to enable the electronic device to implement the method provided by the embodiment of the present disclosure for determining the regulation capability boundary of a power regulation device in a distribution network.

[0177] When the computer program is executed by the processor 901, the above functions defined in the system / device of the embodiment of the present disclosure are executed. According to the embodiment of the present disclosure, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0178] In one embodiment, the computer program may be based on a tangible storage medium such as an optical storage device, a magnetic storage device, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of a signal on a network medium, and downloaded and installed through the communication part 909, and / or installed from a removable medium 911. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0179] According to an embodiment of the present disclosure, the program code for executing the computer program provided by the embodiment of the present disclosure can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (for example, using an Internet service provider to connect through the Internet).

[0180] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram may represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box may also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions. It can be understood by those skilled in the art that the features recorded in the various embodiments of the present disclosure can be combined and / or combined in a variety of ways, even if such a combination or combination is not explicitly recorded in the present disclosure. In particular, without departing from the spirit and teaching of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0181] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A method for determining the regulation capability boundary of a power regulation device in a distribution network, characterized in that: The method comprises: Acquire a distribution network topology, wherein the distribution network topology includes interconnected lines, power conditioning device nodes, power outflow nodes, and power inflow nodes; Based on the line current limiting condition, the outflow voltage of the power outflow node, the inflow voltage of the power inflow node, the line impedance of the interconnected line and the maximum compensation voltage of the power conditioning device node are processed to obtain the node voltage phase difference value boundary of the inflow node, wherein the line current limiting condition indicates that when the power conditioning device injects the maximum compensation voltage, the line current of the interconnected line is less than the preset current value, and the node voltage phase difference value boundary indicates the phase interval of the phase difference value between the outflow voltage phase of the outflow node and the inflow voltage phase of the inflow node; In response to the node voltage phase difference value boundary satisfying a preset flexible access condition, the inflow voltage and the outflow voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary are processed based on a node power expression to obtain a power adjustment range of the power adjustment device; and Based on the power adjustment range, an adjustment capability boundary of the power adjustment device is determined.

2. The method according to claim 1, characterized in that The node power expression includes an outflow power expression and an inflow power expression, wherein the outflow power expression represents a functional relationship between a compensation voltage parameter of the power regulating device and the outflow power of the outflow node, and the inflow power expression represents a functional relationship between a compensation voltage parameter of the power regulating device and the inflow power of the inflow node; Wherein, the power regulation range of the power regulation device is obtained by processing the inflow voltage and the outflow voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the node power expression, including: Based on the outflow power expression and the inflow power expression, the inflow voltage and the outflow voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary are processed to obtain the outflow power and the inflow power corresponding to the node voltage phase difference value; and Based on the outflow power and the inflow power, a node power adjustment range of the power compensation device in a target node voltage condition is determined, wherein the target node voltage condition represents an outflow voltage corresponding to the outflow power and an inflow voltage corresponding to the outflow power.

3. The method according to claim 2, characterized in that Based on the power adjustment range, determining the adjustment capability boundary of the power adjustment device includes: A node power adjustment capability curve graph is determined based on the node power adjustment range and at least one of the node power difference values.

4. The method according to claim 2, characterized in that: The node power expression also includes a compensation power expression, which represents a functional relationship between a compensation voltage parameter of the power regulating device node and the compensation power of the power regulating device node; Wherein, the power regulation range of the power regulation device is obtained by processing the inflow voltage and the outflow voltage, and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on the node power expression, including: The inflow voltage and the outflow voltage, as well as different node voltage phase difference values ​​in the node voltage phase difference value boundary are processed based on the compensation power expression to obtain a compensation power adjustment range of the power adjustment device.

5. The method according to claim 3, characterized in that: The method further comprises: Processing the maximum compensation voltage, the inflow voltage, the outflow voltage and the node voltage phase difference value boundary based on the maximum apparent power expression to obtain the maximum apparent power; and Based on the regulated power difference value between the maximum apparent power and the inflow power, a regulation capability attribute of the power regulation device node is determined, where the regulation capability attribute represents the difference between the capacity of the power regulation device and the inflow power regulation range.

6. The method according to claim 1, characterized in that The power conditioning device node includes a hybrid transformer node.

7. The method according to claim 1, characterized in that The method further comprises: In response to the node voltage phase difference value boundary not satisfying the preset flexible access condition, the access position of the topological node in the distribution network topology is updated, wherein the topological node includes at least one of the following: the inflow node, the outflow node, and the power regulation device node.

8. A device for determining the regulation capability limit of a power regulation device in a distribution network, characterized in that: The device comprises: An acquisition module, used for acquiring a distribution network topology, wherein the distribution network topology includes interconnected lines, power conditioning device nodes, power outflow nodes, and power inflow nodes; A first obtaining module is used to process the outflow voltage of the power outflow node, the inflow voltage of the power inflow node, the line impedance of the interconnected line and the maximum compensation voltage of the power regulation device node based on the line current limiting condition to obtain the node voltage phase difference value boundary of the inflow node, wherein the line current limiting condition indicates that when the power regulation device injects the maximum compensation voltage, the line current of the interconnected line is less than a preset current value, and the node voltage phase difference value boundary indicates the phase interval of the phase difference value between the outflow voltage phase of the outflow node and the inflow voltage phase of the inflow node; a power regulation range obtaining module, configured to obtain a power regulation range of the power regulating device by processing the inflow voltage and the outflow voltage and different node voltage phase difference values ​​in the node voltage phase difference value boundary based on a node power expression in response to the node voltage phase difference value boundary satisfying a preset flexible access condition; and The first determining module is used to determine the adjustment capability boundary of the power adjustment device based on the power adjustment range.

9. An electronic device, comprising: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, enables the processor to implement the method according to any one of claims 1 to 7.

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