Evaluation method and device considering transient characteristics of active power distribution network, and medium

Abstract

The invention discloses an evaluation method and device considering transient characteristics of an active power distribution network, and a medium. The method comprises the steps that parameter values of elements in the active power distribution network are changed for multiple times in a plurality of preset step lengths, preset disturbance is applied to the active power distribution network after the parameter values are changed each time, and active power and reactive power of a connection point of the active power distribution network and a main network are obtained; according to the active power and the reactive power, respectively calculating measurement indexes of different stages of the active power distribution network of each parameter value change; according to the measurement indexes of different stages, calculating a comprehensive measurement evaluation index of the active power distribution network of each parameter value change; and determining the importance degree of each parameter of the active power distribution network according to the comprehensive measurement evaluation index of the multiple changes of each parameter value.

Description

Technical Field

[0001] The present invention relates to the technical field of active distribution network model simulation, and more specifically, to an evaluation method, device and medium considering transient characteristics of an active distribution network. Background Art

[0002] The access of a large number of distributed photovoltaics has gradually transformed the traditional passive distribution network into a more complex active distribution network, and the load-side characteristics of the power grid have undergone significant changes. The study of the action law, dynamic characteristics and impact on the safety and stability of the power grid after the large-scale distributed photovoltaics are connected to the power grid must be based on an active distribution network model with the same actual operating characteristics. The accuracy of the model parameters is directly related to the reliability and authenticity of the simulation results. When the power system is close to a stable state, a small parameter change may cause a huge change in the system state, and even cause the system to become unstable. However, the analysis of the transient characteristics evaluation indicators of the existing active distribution network is inaccurate, which may lead to system instability. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an evaluation method, device and medium taking into account the transient characteristics of an active power distribution network.

[0004] According to one aspect of the present invention, there is provided an evaluation method considering transient characteristics of an active power distribution network, comprising:

[0005] The parameter values ​​of the components in the active distribution network are changed multiple times with multiple preset step sizes, and a preset disturbance is applied to the active distribution network after each parameter value change to obtain the active power and reactive power of the connection point between the active distribution network and the main grid;

[0006] Calculate the measurement indicators of the active distribution network at different stages for each parameter value change based on active power and reactive power;

[0007] According to the measurement indicators at different stages, the comprehensive measurement evaluation indicators of the active distribution network are calculated for each parameter value change;

[0008] According to the comprehensive measurement evaluation index of multiple changes of each parameter value, the importance of each parameter of the active distribution network is determined.

[0009] Optionally, the parameter values ​​of the components in the active distribution network are changed multiple times with multiple preset step sizes, and a disturbance is applied to the active distribution network after each parameter value change to obtain the active power and reactive power of the connection point between the active distribution network and the main grid, including:

[0010] Obtain parameter values ​​of components in active distribution network;

[0011] Applying a preset disturbance to the active distribution network to obtain the initial active power and initial reactive power of the connection point between the active distribution network and the main grid;

[0012] The parameter value is changed multiple times with multiple preset step sizes to obtain multiple changes in active power and multiple changes in reactive power at the connection point between the active distribution network and the main grid;

[0013] The active power and reactive power of the connection point between the active distribution network and the main grid are determined according to the initial active power, the initial reactive power, the multiple changes in active power and the multiple changes in reactive power.

[0014] Optionally, the calculation formula for the measurement indicators at different stages is:

[0015]

[0016] In the formula, S P1 Represents the active power measurement index of the first stage of the active distribution network T1-T2; S Q1 Represents the reactive power measurement index of the first stage of the active distribution network T1-T2; S P2 Represents the active power measurement index of the second stage of the active distribution network T2-T3; S Q2 It represents the reactive power measurement index of the second stage of the active distribution network T2-T3; T1 represents the time when the disturbance occurs; T2 represents the time when the disturbance is removed; T3 represents the time when the power response curve of the active distribution network recovers to the initial steady state after the disturbance is removed; P(t) represents the active power curve; Q(t) represents the reactive power curve; P0 represents the steady-state value of active power; Q0 represents the steady-state value of reactive power.

[0017] Optionally, the calculation formula of the comprehensive measurement evaluation index is:

[0018]

[0019]

[0020] In the formula, S P1，i It represents the measurement index of active power after the first stage parameter change of active distribution network T1-T2 for the i-th time; S P2，i It represents the measurement index of active power after the second stage parameter i-th change of active distribution network T2-T3; S P0 It represents the measurement index of active power when the parameters of active distribution network remain unchanged; S Q0 It represents the reactive power measurement index when the active distribution network does not change; η P1 Represents the comprehensive evaluation index of the active power of the first stage of the active distribution network T1-T2; η Q1 Represents the comprehensive evaluation index of reactive power in the first stage of active distribution network T1-T2; η P2 Represents the comprehensive evaluation index of the active power of the second stage of the active distribution network T2-T3; η Q2Represents the comprehensive evaluation index of reactive power in the second stage of active distribution network T2-T3; η m1 Represents the comprehensive evaluation index of the first stage of the active distribution network T1-T2; η m2 It represents the comprehensive evaluation index of the second stage of the active distribution network T2-T3.

[0021] According to another aspect of the present invention, there is provided an evaluation device taking into account transient characteristics of an active power distribution network, comprising:

[0022] An acquisition module is used to change the parameter values ​​of the components in the active distribution network multiple times with multiple preset step sizes, and apply a preset disturbance to the active distribution network after each parameter value change, to obtain the active power and reactive power of the connection point between the active distribution network and the main grid;

[0023] A first calculation module is used to calculate the measurement index of the active distribution network at different stages of each parameter value change according to the active power and the reactive power;

[0024] The second calculation module is used to calculate the comprehensive measurement evaluation index of the active distribution network for each parameter value change according to the measurement indexes at different stages;

[0025] The determination module is used to determine the importance of each parameter of the active distribution network according to the comprehensive measurement evaluation index of multiple changes of each parameter value.

[0026] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, and the computer program is used to execute the method described in any one of the above aspects of the present invention.

[0027] According to another aspect of the present invention, an electronic device is provided, comprising: a processor; a memory for storing instructions executable by the processor; the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method described in any one of the above aspects of the present invention.

[0028] Therefore, the present invention takes into account the stage characteristics of the transient characteristics of the active distribution network and realizes the accurate extraction of the key parameters of the transient characteristics of the active distribution network. The present invention can accurately extract the key parameters of the active distribution network through the proposed method, improve the cognitive ability of the high-proportion new energy power system, and improve the new clean energy consumption capacity, which has high application value and social significance. It can effectively solve the problem of inaccurate analysis of the transient characteristics evaluation indicators of the existing active distribution network, but the application scenario is not limited to this. In the passive distribution network and the new energy station, more accurate key parameters can be obtained according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0030] Figure 1 is a flow chart of an evaluation method considering transient characteristics of an active power distribution network provided by an exemplary embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of an active power curve after disturbance setting in a calculation example provided by an exemplary embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of a reactive power curve after disturbance setting in a calculation example provided by an exemplary embodiment of the present invention;

[0033] Figure 4 is a schematic structural diagram of an evaluation device considering transient characteristics of an active power distribution network provided by an exemplary embodiment of the present invention;

[0034] Figure 5 This is a structure of an electronic device provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0035] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

[0036] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0037] Those skilled in the art can understand that the terms "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices or modules, etc., and neither represent any specific technical meaning nor indicate the necessary logical order between them.

[0038] It should also be understood that, in the embodiments of the present invention, “plurality” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0039] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0040] In addition, the term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0041] It should also be understood that the description of the various embodiments of the present invention focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0042] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0044] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0045] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] Embodiments of the present invention can be applied to electronic devices such as terminal devices, computer systems, servers, etc., which can operate with many other general or special computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments and / or configurations suitable for use with electronic devices such as terminal devices, computer systems, servers, etc. include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, small computer systems, large computer systems, and distributed cloud computing technology environments including any of the above systems, etc.

[0047] Electronic devices such as terminal devices, computer systems, servers, etc. can be described in the general context of computer system executable instructions (such as program modules) executed by computer systems. Generally, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in a distributed cloud computing environment, where tasks are performed by remote processing devices linked through a communication network. In a distributed cloud computing environment, program modules can be located on local or remote computing system storage media including storage devices.

[0048] Exemplary Methods

[0049] Figure 1 FIG. 1 is a flow chart of an evaluation method considering transient characteristics of an active power distribution network provided by an exemplary embodiment of the present invention. This embodiment can be applied to electronic devices, such as Figure 1 As shown, the evaluation method 100 considering the transient characteristics of the active distribution network includes the following steps:

[0050] Step 101, changing the parameter values ​​of the components in the active distribution network multiple times with multiple preset step sizes, and applying a preset disturbance to the active distribution network after each parameter value change, to obtain the active power and reactive power of the connection point between the active distribution network and the main grid;

[0051] Step 102, calculating the measurement index of the active distribution network at different stages of each parameter value change according to the active power and the reactive power;

[0052] Step 103, calculating the comprehensive measurement evaluation index of the active distribution network for each parameter value change according to the measurement indexes at different stages;

[0053] Step 104: Determine the importance of each parameter of the active distribution network according to the comprehensive measurement evaluation index of multiple changes of each parameter value.

[0054] Specifically, the present invention takes into account the stage characteristics of the transient characteristics of the active distribution network and realizes the accurate extraction of the key parameters of the transient characteristics of the active distribution network. The present invention can accurately extract the key parameters of the active distribution network through the proposed method, improve the cognitive ability of the high-proportion new energy power system, and improve the new clean energy consumption capacity, which has high application value and social significance.

[0055] The present invention can effectively solve the problem of inaccurate analysis of transient characteristic evaluation indicators of existing active distribution networks, but the application scenarios are not limited to this. More accurate key parameters can be obtained according to the present invention in passive distribution networks and new energy stations.

[0056] The present invention provides an evaluation index considering the transient characteristics of an active power distribution network. The technical solution proposed by the present invention includes the following steps.

[0057] Step 1: Obtain parameter values ​​of components in the active distribution network.

[0058] Step 2: Apply disturbance to obtain the active power and reactive power of the connection point between the active distribution network and the main grid.

[0059] Step 3: Change the parameter values ​​of the same components in the active distribution network in a certain step size.

[0060] Step 4: Apply the same disturbance as step 2 to obtain the active and reactive power at the connection point between the active distribution network and the main grid.

[0061] Step 5: Calculate the measurement indicators of the active distribution network at different stages, as shown in the following formula:

[0062]

[0063] In the formula, S P1 Represents the active power measurement index of the first stage of the active distribution network; S Q1 Represents the reactive power measurement index of the first stage of the active distribution network; S P2 Represents the active power measurement index of the second stage of the active distribution network; S Q2 It represents the reactive power measurement index of the second stage of the active distribution network; T1 represents the time when the disturbance occurs; T2 represents the time when the disturbance is removed; T3 represents the time when the power response curve of the active distribution network recovers to the initial steady state after the disturbance is removed; P(t) represents the active power curve; Q(t) represents the reactive power curve; P0 represents the steady-state value of active power; Q0 represents the steady-state value of reactive power.

[0064] Step 6: Repeat steps 3, 4 and 5, and change the parameters n times;

[0065] Step 7: Calculate the comprehensive measurement and evaluation index of the active distribution network, as shown in the following formula:

[0066]

[0067]

[0068] In the formula, S P1，i It represents the measurement index of active power after the i-th change of the parameters in the first stage of the active distribution network;

[0069] In the formula, S P2，i It represents the measurement index of active power after the second stage parameter of active distribution network changes for the i-th time; S P0 It represents the measurement index of active power when the parameters of active distribution network remain unchanged; SQ0 It represents the reactive power measurement index when the active distribution network does not change; η P1 Represents the comprehensive evaluation index of the active power of the first stage of the active distribution network; η Q1 Represents the comprehensive evaluation index of reactive power in the first stage of active distribution network; η P2 Represents the comprehensive evaluation index of the active power of the second stage of the active distribution network; η Q2 Represents the comprehensive evaluation index of the reactive power of the second stage of the active distribution network; η m1 Represents the comprehensive evaluation index of the first stage of active distribution network; η m2 It represents the comprehensive evaluation index of the second stage of active distribution network.

[0070] The present invention provides an evaluation index considering the transient characteristics of an active distribution network, and constructs a distribution network for the transient characteristics of an active distribution network based on ADPSS, in which there are a total of 340 distributed photovoltaics. A voltage drop fault is set in the main network, the fault lasts for 0.1s, and the voltage drops to 0p.u. Figure 2 is the active power of the active distribution network after the disturbance, Figure 3 is the reactive power of the active distribution network after the disturbance.

[0071] The specific implementation example of the present invention is carried out according to the following steps.

[0072] Step 1: Obtain parameter values ​​of components in the active distribution network.

[0073] Step 2: Apply disturbance to obtain the active power and reactive power of the connection point between the active distribution network and the main grid.

[0074] Step 3: Change the parameter values ​​of the same components in the active distribution network by 70%.

[0075] Step 4: Apply the same disturbance as step 1 to obtain the active and reactive power at the connection point between the active distribution network and the main grid when the parameter changes by 70%.

[0076] Step 5: Calculate the measurement indicators of the active distribution network at different stages according to equations (1) to (4), as shown in Tables 1 to 3.

[0077] Table 1 Measurement indicators of induction motor parameters in the first stage of active distribution network

[0078]

[0079] Table 2 Measurement indicators of induction motor parameters in the second stage of active distribution network

[0080]

[0081] Table 3 Measurement indicators of distributed photovoltaic parameters in the first stage of active distribution network

[0082]

[0083] Table 4 Measurement indicators of distributed photovoltaic parameters in the second stage of active distribution network

[0084]

[0085] X in the table s Indicates stator leakage reactance; X r Indicates rotor leakage reactance; X m represents the magnetizing reactance; T J Represents the transient open circuit time constant; R r represents the rotor resistance; S0 represents the slip of the induction motor; k P2 Indicates the proportional coefficient of the active current setting value of distributed photovoltaic; k Q1 Represents the reactive current proportionality coefficient of distributed photovoltaic; k prate Indicates the recovery slope of distributed photovoltaic active current; I Qset Indicates the set value of distributed photovoltaic reactive current; I psetlvrt Indicates the starting value of distributed photovoltaic active current in the second stage.

[0086] Step 6: Change the parameter values ​​to 80%, 120%, and 140% respectively, and repeat steps 3 to 5, as shown in Tables 5 to 8, and the parameters are changed 4 times cumulatively;

[0087] Table 5 Evaluation indexes of induction motor parameters in the first stage of active distribution network

[0088]

[0089] Table 6 Comprehensive evaluation indexes of induction motor parameters in the second stage of active distribution network

[0090]

[0091] Table 7 Measurement indicators of distributed photovoltaic parameters in the first stage of active distribution network

[0092]

[0093]

[0094] Table 8 Measurement indicators of distributed photovoltaic parameters in the second stage of active distribution network

[0095]

[0096] Step 7: Calculate the comprehensive measurement index of the active distribution network according to equations (5) to (10). The calculation results are shown in Tables 9 to 12.

[0097] Table 9 Comprehensive evaluation indexes of induction motor parameters in the first stage of active distribution network

[0098]

[0099] Table 10 Comprehensive evaluation indexes of induction motor parameters in the second stage of active distribution network

[0100]

[0101] Table 11 Comprehensive evaluation indicators of distributed photovoltaic parameters in the first stage of active distribution network

[0102]

[0103]

[0104] Table 12 Comprehensive evaluation indicators of distributed photovoltaic parameters in the second stage of active distribution network

[0105]

[0106] According to the above implementation steps, the evaluation index considering the transient characteristics of the active distribution network of the present invention is implemented, and the key parameters affecting the transient characteristics of the active distribution network are extracted.

[0107] The first stage of the induction motor parameters that affect the active power of the active distribution network are R r , S0, X m , X r 、T J , X s The order of influence on reactive power from large to small is S0, R r , X r , X m 、T J , X s In the second stage, the influence on the active power of the active distribution network is R r , S0, X m , X r , X s 、T J The influence on reactive power from large to small is R r , S0, X r , X m 、T J , X s The comprehensive evaluation index shows that R r The first stage of the distributed photovoltaic parameters that have an impact on the external characteristics of the active distribution network includes k P2 , k Q1,I Qset , but according to the indicators, the impact is small. The second stage has the following impacts on the active power of the active distribution network from large to small: k prate , k P2 ,I psetlvrt , k Q1 The order of influence on reactive power from large to small is k Q1 , k P2 ,I Qset , k prate ,I psetlvrt The comprehensive evaluation index shows that k prate The impact on the external characteristics of the active distribution network is the greatest.

[0108] The present invention provides an evaluation index considering the transient characteristics of an active distribution network, and constructs a distribution network for the transient characteristics of an active distribution network based on ADPSS, in which there are a total of 340 distributed photovoltaics. A voltage drop fault is set in the main network, the fault lasts for 0.1s, and the voltage drops to 0p.u. Figure 2 is the active power of the active distribution network after the disturbance, Figure 3 is the reactive power of the active distribution network after the disturbance.

[0109] Therefore, the present invention takes into account the stage characteristics of the transient characteristics of the active distribution network and realizes the accurate extraction of the key parameters of the transient characteristics of the active distribution network. The present invention can accurately extract the key parameters of the active distribution network through the proposed method, improve the cognitive ability of the high-proportion new energy power system, and improve the new clean energy consumption capacity, which has high application value and social significance. It can effectively solve the problem of inaccurate analysis of the transient characteristics evaluation indicators of the existing active distribution network, but the application scenario is not limited to this. In the passive distribution network and the new energy station, more accurate key parameters can be obtained according to the present invention.

[0110] Exemplary Devices

[0111] Figure 4 FIG. 1 is a schematic diagram of a structure of an evaluation device considering transient characteristics of an active power distribution network provided by an exemplary embodiment of the present invention. Figure 4 As shown, the device 400 includes:

[0112] The acquisition module 410 is used to change the parameter values ​​of the components in the active distribution network multiple times with multiple preset step sizes, and apply a preset disturbance to the active distribution network after each parameter value change, so as to obtain the active power and reactive power of the connection point between the active distribution network and the main grid;

[0113] A first calculation module 420, configured to calculate measurement indicators of the active power distribution network at different stages of each parameter value change according to active power and reactive power;

[0114] A second calculation module 430 is used to calculate the comprehensive measurement evaluation index of the active distribution network for each parameter value change according to the measurement indexes at different stages;

[0115] The determination module 440 is used to determine the importance of each parameter of the active power distribution network according to the comprehensive measurement evaluation index of multiple changes of each parameter value.

[0116] Optionally, the acquisition module 410 includes:

[0117] A first acquisition submodule is used to obtain parameter values ​​of components in the active power distribution network;

[0118] The second acquisition submodule is used to apply a preset disturbance to the active distribution network to obtain the initial active power and initial reactive power of the connection point between the active distribution network and the main grid;

[0119] The third acquisition submodule is used to change the parameter value multiple times with multiple preset step sizes to obtain the multiple changes of active power and reactive power of the connection point between the active distribution network and the main grid;

[0120] The determination submodule is used to determine the active power and reactive power of the connection point between the active distribution network and the main grid according to the initial active power, the initial reactive power, the multiple changes in active power and the multiple changes in reactive power.

[0121] Optionally, the calculation formula for the measurement indicators at different stages is:

[0122] In the formula, S P1 Represents the active power measurement index of the first stage of the active distribution network T1-T2; S Q1 Represents the reactive power measurement index of the first stage of the active distribution network T1-T2; S P2 Represents the active power measurement index of the second stage of the active distribution network T2-T3; S Q2 It represents the reactive power measurement index of the second stage of the active distribution network T2-T3; T1 represents the time when the disturbance occurs; T2 represents the time when the disturbance is removed; T3 represents the time when the power response curve of the active distribution network recovers to the initial steady state after the disturbance is removed; P(t) represents the active power curve; Q(t) represents the reactive power curve; P0 represents the steady-state value of active power; Q0 represents the steady-state value of reactive power.

[0123] Optionally, the calculation formula of the comprehensive measurement evaluation index is:

[0124]

[0125] In the formula, S P1，i It represents the measurement index of active power after the first stage parameter change of active distribution network T1-T2 for the i-th time; SP2，i It represents the measurement index of active power after the second stage parameter i-th change of active distribution network T2-T3; S P0 It represents the measurement index of active power when the parameters of active distribution network remain unchanged; S Q0 It represents the reactive power measurement index when the active distribution network does not change; η P1 Represents the comprehensive evaluation index of the active power of the first stage of the active distribution network T1-T2; η Q1 Represents the comprehensive evaluation index of reactive power in the first stage of active distribution network T1-T2; η P2 Represents the comprehensive evaluation index of the active power of the second stage of the active distribution network T2-T3; η Q2 Represents the comprehensive evaluation index of reactive power in the second stage of active distribution network T2-T3; η m1 Represents the comprehensive evaluation index of the first stage of the active distribution network T1-T2; η m2 It represents the comprehensive evaluation index of the second stage of the active distribution network T2-T3.

[0126] Exemplary Electronic Devices

[0127] Figure 5 This is a structure of an electronic device provided by an exemplary embodiment of the present invention. Figure 5 As shown, the electronic device 50 includes one or more processors 51 and a memory 52 .

[0128] The processor 51 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0129] The memory 52 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 51 may run the program instructions to implement the methods of the software programs of the various embodiments of the present invention described above and / or other desired functions. In one example, the electronic device may also include: an input device 53 and an output device 54, which are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0130] In addition, the input device 53 may also include, for example, a keyboard, a mouse, etc.

[0131] The output device 54 can output various information to the outside. The output device 54 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto.

[0132] Of course, to simplify, Figure 5 Only some of the components related to the present invention in the electronic device are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, the electronic device may further include any other appropriate components according to specific application conditions.

[0133] Exemplary computer program products and computer-readable storage media

[0134] In addition to the above-mentioned methods and devices, an embodiment of the present invention may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present invention described in the above-mentioned "Exemplary Method" section of this specification.

[0135] The computer program product may be written in any combination of one or more programming languages ​​to write program code for performing the operations of the embodiments of the present invention, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0136] In addition, an embodiment of the present invention may also be a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present invention described in the above “Exemplary Method” section of this specification.

[0137] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, system or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0138] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and facilitation of understanding, rather than limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0139] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0140] The block diagrams of the devices, systems, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, systems, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0141] The method and system of the present invention may be implemented in many ways. For example, the method and system of the present invention may be implemented by software, hardware, firmware or any combination of software, hardware, firmware. The above order of steps for the method is only for illustration, and the steps of the method of the present invention are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present invention may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.

[0142] It should also be noted that in the system, device and method of the present invention, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the present invention. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined here can be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown here, but in accordance with the widest range consistent with the principles and novel features disclosed here.

[0143] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. An evaluation method considering transient characteristics of active distribution network, characterized in that: include: The parameter values ​​of the components in the active distribution network are changed multiple times with multiple preset step sizes, and a preset disturbance is applied to the active distribution network after each parameter value change to obtain the active power and reactive power of the connection point between the active distribution network and the main grid; Calculating measurement indicators of the active power distribution network at different stages of each parameter value change according to the active power and the reactive power; Calculate the comprehensive measurement evaluation index of the active distribution network for each parameter value change according to the measurement indexes at different stages; The importance of each parameter of the active power distribution network is determined according to a comprehensive measurement evaluation index of multiple changes of each parameter value.

2. The method according to claim 1, characterized in that The parameter values ​​of the components in the active distribution network are changed multiple times with multiple preset steps, and disturbances are applied to the active distribution network after each parameter value change to obtain the active power and reactive power of the connection point between the active distribution network and the main grid, including: Obtaining parameter values ​​of components in the active power distribution network; Applying the preset disturbance to the active distribution network to obtain the initial active power and initial reactive power of the connection point between the active distribution network and the main grid; The parameter value is changed multiple times with multiple preset step sizes to obtain multiple changes in active power and multiple changes in reactive power of the connection point between the active distribution network and the main grid; The active power and reactive power of the connection point between the active power distribution network and the main grid are determined according to the initial active power, the initial reactive power, the multiple changes in active power and the multiple changes in reactive power.

3. The method according to claim 1, characterized in that: The calculation formula of the measurement indicators at different stages is: In the formula, S P1 Represents the active power measurement index of the first stage of the active distribution network T1-T2; S Q1 Represents the reactive power measurement index of the first stage of the active distribution network T1-T2; S P2 Represents the active power measurement index of the second stage of the active distribution network T2-T3; S Q2 It represents the reactive power measurement index of the second stage of the active distribution network T2-T3; T1 represents the time when the disturbance occurs; T2 represents the time when the disturbance is removed; T3 represents the time when the power response curve of the active distribution network recovers to the initial steady state after the disturbance is removed; P(t) represents the active power curve; Q(t) represents the reactive power curve; P0 represents the steady-state value of active power; Q0 represents the steady-state value of reactive power.

4. The method according to claim 3, characterized in that The calculation formula of the comprehensive measurement evaluation index is: In the formula, S P1，i It represents the measurement index of active power after the first stage parameter change of active distribution network T1-T2 for the i-th time; S P2，i It represents the measurement index of active power after the second stage parameter i-th change of active distribution network T2-T3; S P0 It represents the measurement index of active power when the parameters of active distribution network remain unchanged; S Q0 It represents the reactive power measurement index when the active distribution network does not change; η P1 Represents the comprehensive evaluation index of the active power of the first stage of the active distribution network T1-T2; η Q1 Represents the comprehensive evaluation index of reactive power in the first stage of active distribution network T1-T2; η P2 Represents the comprehensive evaluation index of the active power of the second stage of the active distribution network T2-T3; η Q2 Represents the comprehensive evaluation index of reactive power in the second stage of active distribution network T2-T3; η m1 Represents the comprehensive evaluation index of the first stage of the active distribution network T1-T2; η m2 It represents the comprehensive evaluation index of the second stage of the active distribution network T2-T3.

5. An evaluation device considering transient characteristics of an active distribution network, characterized in that: include: An acquisition module is used to change the parameter values ​​of the components in the active distribution network multiple times with multiple preset step sizes, and apply a preset disturbance to the active distribution network after each parameter value change, to obtain the active power and reactive power of the connection point between the active distribution network and the main grid; A first calculation module, used to calculate the measurement index of the active power distribution network at different stages of each parameter value change according to the active power and the reactive power; A second calculation module is used to calculate the comprehensive measurement evaluation index of the active distribution network for each parameter value change according to the measurement indexes at different stages; The determination module is used to determine the importance of each parameter of the active power distribution network according to the comprehensive measurement evaluation index of multiple changes of each parameter value.

6. The device according to claim 5, characterized in that Get modules, including: A first acquisition submodule, used to obtain parameter values ​​of components in the active power distribution network; A second acquisition submodule is used to apply the preset disturbance to the active distribution network to obtain the initial active power and initial reactive power of the connection point between the active distribution network and the main grid; A third acquisition submodule is used to change the parameter value multiple times with multiple preset step sizes to obtain multiple changes of active power and multiple changes of reactive power of the connection point between the active distribution network and the main grid; The determination submodule is used to determine the active power and reactive power of the connection point between the active distribution network and the main grid according to the initial active power, the initial reactive power, the multiple changes in active power and the multiple changes in reactive power.

7. The device according to claim 5, characterized in that The calculation formula of the measurement indicators at different stages is: In the formula, S P1 Represents the active power measurement index of the first stage of the active distribution network T1-T2; S Q1 Represents the reactive power measurement index of the first stage of the active distribution network T1-T2; S P2 Represents the active power measurement index of the second stage of the active distribution network T2-T3; S Q2 It represents the reactive power measurement index of the second stage of the active distribution network T2-T3; T1 represents the time when the disturbance occurs; T2 represents the time when the disturbance is removed; T3 represents the time when the power response curve of the active distribution network recovers to the initial steady state after the disturbance is removed; P(t) represents the active power curve; Q(t) represents the reactive power curve; P0 represents the steady-state value of active power; Q0 represents the steady-state value of reactive power.

8. The device according to claim 7, characterized in that The calculation formula of the comprehensive measurement evaluation index is: In the formula, S P1，i It represents the measurement index of active power after the first stage parameter change of active distribution network T1-T2 for the i-th time; S P2，i It represents the measurement index of active power after the second stage parameter i-th change of active distribution network T2-T3; S P0 It represents the measurement index of active power when the parameters of active distribution network remain unchanged; S Q0 It represents the reactive power measurement index when the active distribution network does not change; η P1 Represents the comprehensive evaluation index of the active power of the first stage of the active distribution network T1-T2; η Q1 Represents the comprehensive evaluation index of reactive power in the first stage of active distribution network T1-T2; η P2 Represents the comprehensive evaluation index of the active power of the second stage of the active distribution network T2-T3; η Q2 Represents the comprehensive evaluation index of reactive power in the second stage of active distribution network T2-T3; η m1 Represents the comprehensive evaluation index of the first stage of the active distribution network T1-T2; η m2 It represents the comprehensive evaluation index of the second stage of the active distribution network T2-T3.

9. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to execute the method according to any one of claims 1 to 4.

10. An electronic device, characterized in that: The electronic device comprises: processor; a memory for storing instructions executable by the processor; The processor is used to read the executable instructions from the memory and execute the instructions to implement the method described in any one of claims 1 to 4.

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