Method and device for determining equipment power disturbance sharing quantity and storage medium

Abstract

The invention discloses an equipment power disturbance sharing amount determination method and device and a storage medium, which are suitable for a hybrid electric power system, the hybrid electric power system comprises network construction type equipment and network following type equipment, and the method comprises the following steps: taking an active power disturbance node in the hybrid electric power system as a target power disturbance node; a process of generating power disturbance by the hybrid power system is divided into a plurality of different stages, and the plurality of different stages comprise a power disturbance distribution stage, an inertia response stage, a frequency modulation stage and a steady state stage; and determining the equipment power disturbance sharing amount of the hybrid power system in each stage based on the target power disturbance node. According to the method, the equipment power disturbance sharing amount of the hybrid power system at different stages in the power disturbance process can be accurately determined, so that the calculation accuracy of the equipment power disturbance sharing amount of the hybrid power system can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a method, a device and a storage medium for determining a power disturbance sharing amount of equipment. Background Art

[0002] The power system is gradually developing towards a high proportion of new energy and a high proportion of power electronic equipment (double high). Traditional synchronous generators can effectively maintain the stability of the system frequency due to their inertia and primary frequency regulation capabilities. However, most new energy equipment (such as wind power and photovoltaics) use power electronic interfaces to access the power grid, usually using grid-following control, which does not have instantaneous power sharing capabilities and inertia support, resulting in reduced system frequency anti-interference capabilities.

[0003] In order to improve the frequency response of the system, the introduction of grid-following equipment and grid-forming equipment with additional frequency control has become an important approach. Grid-forming equipment simulates the characteristics of synchronous machines through virtual synchronous machine control, provides inertia and primary frequency modulation response. However, different types of power electronic equipment have different power distribution mechanisms in hybrid systems. Especially when considering system delays, the power disturbances in the grid-following and grid-forming hybrid systems have different distribution rules at different stages. The existing method for determining the power sharing amount of equipment after power disturbance is difficult to accurately determine the power disturbance sharing amount of different equipment at each stage after the power disturbance. Summary of the invention

[0004] The present invention provides a method, device and storage medium for determining the power disturbance sharing amount of equipment, so as to solve the technical problem that the existing method for determining the power disturbance sharing amount of equipment after power disturbance is difficult to accurately determine the power disturbance sharing amount of different equipment at each stage after power disturbance.

[0005] The present invention provides a method for determining a power disturbance sharing amount of a device, which is applicable to a hybrid power system, wherein the hybrid power system includes a grid-forming device and a grid-following device, and the method for determining a power disturbance sharing amount of the device includes:

[0006] Taking the active power disturbance node in the hybrid power system as the target power disturbance node;

[0007] The process of generating power disturbance by the hybrid power system is divided into a plurality of different stages, wherein the plurality of different stages include a power disturbance distribution stage, an inertia response stage, a frequency adjustment stage and a steady state stage;

[0008] Based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system in each stage is determined.

[0009] Furthermore, determining the equipment power disturbance sharing amount of the hybrid power system at each stage based on the target power disturbance node includes:

[0010] In the power disturbance distribution stage, only the real power network structure is considered, and at the moment of disturbance, the generated power disturbance is distributed among the network-forming devices according to the synchronous power coefficient of the target power disturbance node;

[0011] Calculating a first target power coefficient in the power disturbance allocation phase based on the target power disturbance node and the real electrical distance;

[0012] The device power disturbance share in the power disturbance allocation phase is calculated according to the first target power coefficient.

[0013] Furthermore, the determining, based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system at each stage further includes:

[0014] In the inertia response stage, considering the virtual impedance control of the real power network structure industry, based on the target power disturbance node, the real electrical distance and the electrical distance virtualized by the virtual inertia control, the second target synchronous power coefficient of the inertia response stage is calculated;

[0015] The device power disturbance sharing amount in the inertia response phase is calculated according to the second target synchronous power coefficient.

[0016] Furthermore, the determining, based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system at each stage further includes:

[0017] In the frequency mediation stage, a joint solution is performed based on the spatiotemporal distribution characteristics of the frequency and the closed-loop process of the hybrid power system to obtain the equipment power disturbance sharing amount in the frequency mediation stage.

[0018] Furthermore, a joint solution is performed based on the frequency spatiotemporal distribution characteristics and the closed-loop process of the hybrid power system to obtain the equipment power disturbance sharing amount in the frequency adjustment stage, including:

[0019]

[0020] Among them, the 1st to nth devices are network-building devices, and the n+1st to n+mth devices are network-following devices with additional control. i and are the power disturbance sharing of the i-th networking device, ΔP j and are the power disturbance sharing and frequency change rate of the jth grid-following device, ΔP k is the power disturbance of the target power disturbance point k, K i,k and K i,jThey represent the synchronization power coefficients between the power disturbance point and the i-th network-building device, and between the j-th network-following device and the i-th network-building device, respectively. Ji and T Jj are the virtual inertias of the i-th station network type and the j-th station network type, and F is the relationship coefficient.

[0021] Furthermore, the determining, based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system at each stage further includes:

[0022] In the steady-state stage, the power disturbance generated is distributed among all devices according to the damping coefficient of the hybrid power system, and the power disturbance sharing amount of the devices in the stable stage is determined according to the distribution situation.

[0023] The present invention also provides a device for determining a power disturbance sharing amount of equipment, comprising:

[0024] A target power disturbance node determination module, used for taking the active power disturbance node in the hybrid power system as the target power disturbance node;

[0025] A stage division module, used for dividing the process of generating power disturbance of the hybrid power system into a plurality of different stages, wherein the plurality of different stages include a power disturbance distribution stage, an inertia response stage, a frequency adjustment stage and a steady state stage;

[0026] The device power disturbance sharing amount determination module is used to determine the device power disturbance sharing amount of the hybrid power system in each stage based on the target power disturbance node.

[0027] Furthermore, the device power disturbance sharing amount determination module is also used for:

[0028] In the power disturbance distribution stage, only the real power network structure is considered, and at the moment of disturbance, the generated power disturbance is distributed among the network-forming devices according to the synchronous power coefficient of the target power disturbance node;

[0029] Calculating a first target power coefficient in the power disturbance allocation phase based on the target power disturbance node and the real electrical distance;

[0030] The device power disturbance share in the power disturbance allocation phase is calculated according to the first target power coefficient.

[0031] The present invention also provides a terminal device, comprising: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the method for determining the device power disturbance sharing amount as described above is implemented.

[0032] The present invention also provides a computer-readable storage medium, which includes a stored computer program; wherein, when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the method for determining the device power disturbance sharing amount as described above.

[0033] The embodiment of the present invention divides the process of the hybrid power system generating power disturbance into multiple different stages, wherein the multiple different stages include a power disturbance allocation stage, an inertia response stage, a frequency regulation stage and a steady-state stage. Based on the target power disturbance node, the equipment power disturbance share of the hybrid power system in each stage is determined. The equipment power disturbance share of the hybrid power system at different stages in the process of power disturbance can be accurately determined, thereby improving the accuracy of the calculation of the equipment power disturbance share of the hybrid power system.

[0034] Furthermore, the embodiment of the present invention calculates the equipment power disturbance sharing after the virtual impedance control based on the synchronous power coefficient considering the real power network structure and the virtual impedance control, and can accurately determine the equipment power disturbance sharing in the hybrid power system during the inertia response stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of a method for determining a device power disturbance sharing amount provided by an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of phased power disturbance distribution of a hybrid power system provided by an embodiment of the present invention;

[0037] Figure 3 It is a structural schematic diagram of a device for determining a device power disturbance sharing amount provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] See also Figure 1 The present invention provides a method for determining the power disturbance sharing amount of a device, which is applicable to a hybrid power system. The hybrid power system includes a grid-forming device and a grid-following device. The method for determining the power disturbance sharing amount of a device includes:

[0042] S1, taking the active power disturbance node in the hybrid power system as the target power disturbance node;

[0043] In the embodiment of the present invention, an active power disturbance node may be selected as a target power disturbance node.

[0044] In an embodiment of the present invention, the active power disturbance node can be determined according to actual needs. The target power disturbance node can be one or more. If there are multiple target power disturbance nodes, the frequency change relationship of each bus output of the synchronous power coefficient can be calculated for each target power disturbance node.

[0045] In an embodiment of the present invention, a typical active power disturbance node can be selected as a target power disturbance node according to the frequency safety requirements of the hybrid power system. For example, the target power disturbance node is selected as a load center node with large volatility and a high supply guarantee level, or a frequency safety N-1 unit node, or a start and end node of a high-voltage and large-capacity transmission line.

[0046] S2, dividing the process of generating power disturbance in the hybrid power system into a plurality of different stages, wherein the plurality of different stages include a power disturbance distribution stage, an inertia response stage, a frequency adjustment stage and a steady-state stage;

[0047] S3. Based on the target power disturbance node, determine the equipment power disturbance sharing amount of the hybrid power system in each stage.

[0048] The embodiment of the present invention divides the process of power disturbance generated by a hybrid power system into multiple different stages, wherein the multiple different stages include a power disturbance allocation stage, an inertia response stage, a frequency regulation stage and a steady-state stage, and determines the power disturbance share of the equipment in the hybrid power system in each stage based on the target power disturbance node. The power disturbance share of the equipment in the hybrid power system at different stages during the power disturbance can be accurately determined, thereby improving the accuracy of the calculation of the power disturbance share of the equipment in the hybrid power system.

[0049] In one embodiment, based on the target power disturbance node, determining the power disturbance sharing amount of the equipment in each stage of the hybrid power system includes:

[0050] In the power disturbance distribution stage, only the real power network structure is considered, and at the moment of disturbance, the generated power disturbance is distributed among the network-forming devices according to the synchronous power coefficient of the target power disturbance node;

[0051] A first target power coefficient of the power disturbance allocation phase is calculated based on the target power disturbance node and the real electrical distance;

[0052] The device power disturbance share in the power disturbance allocation phase is calculated according to the first target power coefficient.

[0053] In the embodiment of the present invention, the network-forming equipment is controlled by a virtual synchronous machine, which includes three control loops: power outer loop, voltage loop, and current loop. The establishment of the dq coordinate system on the machine side does not rely on a phase-locked loop but is established through a virtual rotor motion equation, based on which the function of network self-synchronization is realized. Therefore, similar to the synchronous machine, the power disturbance at the moment of disturbance is distributed among the network-forming equipment according to the synchronous power coefficient distribution, the calculation of the electrical distance only includes the real line part, and the first target power coefficient is K.

[0054] The calculation formula for equipment power disturbance sharing in the power disturbance distribution stage is as follows:

[0055]

[0056] In one embodiment, based on the target power disturbance node, determining the power disturbance sharing amount of the equipment in each stage of the hybrid power system further includes:

[0057] In the inertia response stage, considering the virtual impedance control of the real power network structure industry, the second target synchronous power coefficient of the inertia response stage is calculated based on the target power disturbance node, the real electrical distance and the electrical distance virtualized by the virtual inertia control;

[0058] According to the second target synchronous power coefficient, the equipment power disturbance sharing amount in the inertia response phase is calculated.

[0059] In the embodiment of the present invention, the virtual impedance control is to superimpose the virtual impedance voltage dq axis component U on the voltage loop. vid and U viq , the calculation formula is:

[0060]

[0061] Among them, U vid is the d-axis component of the virtual impedance voltage, U viq is the q-axis component of the virtual impedance voltage, R v is a virtual resistor, X v is the virtual reactance, i d is the d-axis component of the current, i q is the q-axis component of the current. It should be noted that in the embodiments of the present invention, the virtual resistance is ignored and only the influence of the virtual reactance is concerned. The virtual reactance virtualizes an impedance, which affects the calculation of the electrical distance and further affects the synchronous power coefficient. However, unlike the actual electrical distance, the virtual electrical distance is controlled with a certain control delay and is not completed instantly. After the virtual impedance control takes effect, the power disturbance is distributed among the meshing devices according to the synchronous power coefficient allocation K'. The calculation of the electrical distance in K' includes both the real line part and the virtual electrical distance. The meshing power disturbance share after the virtual impedance action, that is, the equipment power disturbance share in the inertia response stage, is calculated according to the following formula:

[0062]

[0063] In one embodiment, based on the target power disturbance node, determining the power disturbance sharing amount of the equipment in each stage of the hybrid power system further includes:

[0064] In the frequency regulation stage, a joint solution is performed based on the spatiotemporal distribution characteristics of the frequency and the closed-loop process of the hybrid power system to obtain the equipment power disturbance sharing in the frequency regulation stage.

[0065] In one embodiment, a joint solution is performed based on the frequency spatiotemporal distribution characteristics and the closed-loop process of the hybrid power system to obtain the equipment power disturbance sharing amount in the frequency regulation stage, including:

[0066]

[0067] Among them, the 1st to nth devices are network-building devices, and the n+1st to n+mth devices are network-following devices with additional control. i and are the power disturbance sharing of the i-th networking device, ΔP j and are the power disturbance sharing and frequency change rate of the jth grid-following device, ΔPk is the power disturbance of the target power disturbance point k, K i,k and K i,j They represent the synchronization power coefficients between the power disturbance point and the i-th network-building device, and between the j-th network-following device and the i-th network-building device, respectively. Ji and T Jj are the virtual inertias of the i-th station network type and the j-th station network type, and F is the relationship coefficient.

[0068] In the embodiment of the present invention, the grid-following type additional comprehensive inertia control is performed, and the frequency modulation power term ΔP related to the frequency is added to the power reference value. * , thus having virtual inertia and primary frequency modulation capability, as shown in the following formula:

[0069] ΔP * =(T J s+D)(-Δf)

[0070] When the grid-following inertia response occurs, the frequency of the entire network is inconsistent, and the spatial distribution of transient frequencies must be taken into account. The machine-side frequency is different from the frequencies of other nodes. For a hybrid system of grid-following and grid-forming equipment with additional control, the bus node frequency of the instantaneous frequency measurement point of the grid-following disturbance can be fully expressed by the frequency of the grid-forming type according to the line impedance distribution relationship.

[0071] Specifically, there are differences in the active-frequency response between the grid-following type with additional control and the grid-forming type. For the grid-forming type with voltage source characteristics, after the power disturbance occurs, it first changes its electromagnetic power, and then changes its speed under the control. The grid-following type equipment does not first change its power, but tracks the frequency change at the machine end caused by the frequency change of the grid-forming type, and then changes its own output power under the control, which in turn affects the electromagnetic power of the grid-forming type equipment.

[0072] According to the relationship between the required synchronous power coefficient and the frequency change rate of each bus in the system, the closed-loop process of power disturbance distribution of the hybrid system can be obtained, and the corresponding calculation formula can be written out for simultaneous solution. For the closed-loop process of power disturbance of the hybrid system including n grid-forming type and m grid-following type equipment with additional control, the calculation formula of the equipment power disturbance sharing amount in the Shanshu frequency adjustment stage is used to calculate the equipment power disturbance sharing amount in this stage.

[0073] In one embodiment, based on the target power disturbance node, determining the power disturbance sharing amount of the equipment in each stage of the hybrid power system further includes:

[0074] In the steady-state stage, the power disturbance generated is distributed among all devices according to the damping coefficient of the hybrid power system, and the power disturbance sharing amount of the devices in the stable stage is determined based on the distribution.

[0075] In the embodiment of the present invention, after allocating the power disturbance among all the devices, the power disturbance sharing amount of the devices in the stable phase is calculated according to the following formula:

[0076]

[0077] See also Figure 2 , which is a schematic diagram of phased power disturbance distribution in a hybrid power system provided in an embodiment of the present invention.

[0078] The implementation of the embodiments of the present invention has the following beneficial effects:

[0079] The embodiment of the present invention divides the process of power disturbance generated by a hybrid power system into multiple different stages, wherein the multiple different stages include a power disturbance allocation stage, an inertia response stage, a frequency regulation stage and a steady-state stage, and determines the power disturbance share of the equipment in the hybrid power system in each stage based on the target power disturbance node. The power disturbance share of the equipment in the hybrid power system at different stages during the power disturbance can be accurately determined, thereby improving the accuracy of the calculation of the power disturbance share of the equipment in the hybrid power system.

[0080] Furthermore, the power disturbance sharing of the equipment after the virtual impedance control is calculated based on the synchronous power coefficient considering the real power network structure and the virtual impedance control, which can accurately determine the power disturbance sharing of the equipment in the hybrid power system during the inertia response stage.

[0081] See also Figure 3 Based on the same inventive concept as the above embodiment, the present invention further provides a device for determining a power disturbance sharing amount of a device, comprising:

[0082] The target power disturbance node determination module 10 is used to use the active power disturbance node in the hybrid power system as the target power disturbance node;

[0083] The stage division module 20 is used to divide the process of generating power disturbance in the hybrid power system into a plurality of different stages, wherein the plurality of different stages include a power disturbance distribution stage, an inertia response stage, a frequency adjustment stage and a steady state stage;

[0084] The device power disturbance sharing amount determination module 30 is used to determine the device power disturbance sharing amount of the hybrid power system at each stage based on the target power disturbance node.

[0085] In one embodiment, the device power disturbance sharing amount determination module 30 is further used for:

[0086] In the power disturbance distribution stage, only the real power network structure is considered, and at the moment of disturbance, the generated power disturbance is distributed among the network-forming devices according to the synchronous power coefficient of the target power disturbance node;

[0087] A first target power coefficient of the power disturbance allocation phase is calculated based on the target power disturbance node and the real electrical distance;

[0088] The device power disturbance share in the power disturbance allocation phase is calculated according to the first target power coefficient.

[0089] In one embodiment, based on the target power disturbance node, determining the power disturbance sharing amount of the equipment in each stage of the hybrid power system further includes:

[0090] In the inertia response stage, considering the virtual impedance control of the real power network structure industry, the second target synchronous power coefficient of the inertia response stage is calculated based on the target power disturbance node, the real electrical distance and the electrical distance virtualized by the virtual inertia control;

[0091] According to the second target synchronous power coefficient, the equipment power disturbance sharing amount in the inertia response phase is calculated.

[0092] In one embodiment, based on the target power disturbance node, determining the power disturbance sharing amount of the equipment in each stage of the hybrid power system further includes:

[0093] In the frequency regulation stage, a joint solution is performed based on the spatiotemporal distribution characteristics of the frequency and the closed-loop process of the hybrid power system to obtain the equipment power disturbance sharing in the frequency regulation stage.

[0094] In one embodiment, a joint solution is performed based on the frequency spatiotemporal distribution characteristics and the closed-loop process of the hybrid power system to obtain the equipment power disturbance sharing amount in the frequency regulation stage, including:

[0095]

[0096] Among them, the 1st to nth devices are network-building devices, and the n+1st to n+mth devices are network-following devices with additional control. i and are the power disturbance sharing of the i-th networking device, ΔP j and are the power disturbance sharing and frequency change rate of the jth grid-following device, ΔP k is the power disturbance of the target power disturbance point k, K i,k and K i,j They represent the synchronization power coefficients between the power disturbance point and the i-th network-building device, and between the j-th network-following device and the i-th network-building device, respectively.Ji and T Jj are the virtual inertias of the i-th station network type and the j-th station network type, and F is the relationship coefficient.

[0097] In one embodiment, based on the target power disturbance node, determining the power disturbance sharing amount of the equipment in each stage of the hybrid power system further includes:

[0098] In the steady-state stage, the power disturbance generated is distributed among all devices according to the damping coefficient of the hybrid power system, and the power disturbance sharing amount of the devices in the stable stage is determined based on the distribution.

[0099] Accordingly, an embodiment of the present invention also provides a terminal device, comprising: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, it implements the method for determining the device power disturbance sharing amount of any one of the above embodiments.

[0100] The terminal device of this embodiment includes: a processor, a memory, and a computer program and computer instructions stored in the memory and executable on the processor. When the processor executes the computer program, each step in the above embodiment 1 is implemented, for example Figure 1 Alternatively, when the processor executes the computer program, the functions of each module / unit in the above-mentioned device embodiment, such as the device power disturbance sharing amount determination module 30, are implemented.

[0101] Exemplarily, the computer program can be divided into one or more modules / units, one or more modules / units are stored in a memory and executed by a processor to complete the present invention. One or more modules / units can be a series of computer program instruction segments that can perform specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device. For example, the device power disturbance sharing amount determination module 30 is used to determine the device power disturbance sharing amount of the hybrid power system at each stage based on the target power disturbance node.

[0102] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. The terminal device may include more or fewer components than shown in the diagram, or may combine certain components, or different components. For example, the terminal device may also include an input / output device, a network access device, a bus, etc.

[0103] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0104] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created according to the use of the mobile terminal, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Med ia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (F l ash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0105] Among them, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0106] Accordingly, an embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute a method for determining a device power disturbance sharing amount as described in any one of the above embodiments.

[0107] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining the amount of equipment power disturbance sharing, characterized in that: Applicable to a hybrid power system, the hybrid power system includes a grid-building device and a grid-following device, and the method for determining the power disturbance sharing amount of the device includes: Taking the active power disturbance node in the hybrid power system as the target power disturbance node; The process of generating power disturbance by the hybrid power system is divided into a plurality of different stages, wherein the plurality of different stages include a power disturbance distribution stage, an inertia response stage, a frequency adjustment stage and a steady state stage; Based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system in each stage is determined.

2. The method for determining the equipment power disturbance sharing amount according to claim 1, characterized in that: The determining, based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system at each stage comprises: In the power disturbance distribution stage, only the real power network structure is considered, and at the moment of disturbance, the generated power disturbance is distributed among the network-forming devices according to the synchronous power coefficient of the target power disturbance node; Calculating a first target power coefficient in the power disturbance allocation phase based on the target power disturbance node and the real electrical distance; The device power disturbance share in the power disturbance allocation phase is calculated according to the first target power coefficient.

3. The method for determining the equipment power disturbance sharing amount according to claim 1, characterized in that: The determining, based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system at each stage further includes: In the inertia response stage, considering the virtual impedance control of the real power network structure industry, based on the target power disturbance node, the real electrical distance and the electrical distance virtualized by the virtual inertia control, the second target synchronous power coefficient of the inertia response stage is calculated; The device power disturbance sharing amount in the inertia response phase is calculated according to the second target synchronous power coefficient.

4. The method for determining the equipment power disturbance sharing amount according to claim 1, characterized in that: The determining, based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system at each stage further includes: In the frequency mediation stage, a joint solution is performed based on the spatiotemporal distribution characteristics of the frequency and the closed-loop process of the hybrid power system to obtain the equipment power disturbance sharing amount in the frequency mediation stage.

5. The method for determining the equipment power disturbance sharing amount according to claim 4, characterized in that: Based on the frequency spatiotemporal distribution characteristics and the closed-loop process of the hybrid power system, a joint solution is performed to obtain the equipment power disturbance sharing amount in the frequency regulation stage, including: Among them, the 1st to nth devices are network-building devices, and the n+1st to n+mth devices are network-following devices with additional control. i and are the power disturbance sharing of the i-th networking device, ΔP j and are the power disturbance sharing and frequency change rate of the jth grid-following device, ΔP k is the power disturbance of the target power disturbance point k, K i,k and K i,j They represent the synchronization power coefficients between the power disturbance point and the i-th network-building device, and between the j-th network-following device and the i-th network-building device, respectively. Ji and T Jj are the virtual inertias of the i-th station network type and the j-th station network type, and F is the relationship coefficient.

6. The method for determining the equipment power disturbance sharing amount according to claim 1, characterized in that: The determining, based on the target power disturbance node, the equipment power disturbance sharing amount of the hybrid power system at each stage further includes: In the steady-state stage, the power disturbance generated is distributed among all devices according to the damping coefficient of the hybrid power system, and the power disturbance sharing amount of the devices in the stable stage is determined according to the distribution situation.

7. A device for determining the amount of equipment power disturbance sharing, characterized in that: include: A target power disturbance node determination module, used for taking the active power disturbance node in the hybrid power system as the target power disturbance node; A stage division module, used for dividing the process of generating power disturbance of the hybrid power system into a plurality of different stages, wherein the plurality of different stages include a power disturbance distribution stage, an inertia response stage, a frequency adjustment stage and a steady state stage; The device power disturbance sharing amount determination module is used to determine the device power disturbance sharing amount of the hybrid power system in each stage based on the target power disturbance node.

8. The device for determining the amount of equipment power disturbance sharing according to claim 7, wherein the device power disturbance sharing amount determining module is further used for: In the power disturbance distribution stage, only the real power network structure is considered, and at the moment of disturbance, the generated power disturbance is distributed among the network-forming devices according to the synchronous power coefficient of the target power disturbance node; Calculating a first target power coefficient in the power disturbance allocation phase based on the target power disturbance node and the real electrical distance; The device power disturbance share in the power disturbance allocation phase is calculated according to the first target power coefficient.

9. A terminal device, characterized in that: include: A processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the method for determining the device power disturbance sharing amount as described in any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program; wherein, when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the method for determining the device power disturbance sharing amount according to any one of claims 1 to 6.

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