Modeling simulation method and system for multiple new energy stations of regional power grid based on ADPSS

Abstract

The invention discloses a regional power grid multi-new energy station modeling simulation method and system based on ADPSS, and the method comprises the steps: carrying out the equivalence of new energy unit models of the same type according to single-machine multiplication, and carrying out the sub-circuit packaging of a single-machine multiplication model, and obtaining a single-machine multiplication packaging model; different types of single-machine multiplying packaging models are connected to a new energy station grid-connected point low-voltage side bus bar, and are connected to a system bus through a new energy station boosting transformer and a station bus resistor, and the single-station equivalent model is packaged to obtain a single-station equivalent packaging model; electromechanical interfaces of all grid-connected points are connected to the corresponding single-station equivalent packaging models through buses, and regional new energy coincidence rates are set to form a multi-station packaging model; electromechanical-electromagnetic network division is carried out, a system side is divided into an electromechanical sub-network, and a plurality of regional new energy stations are divided into an electromagnetic sub-network. Hybrid simulation is carried out based on electromechanical-electromagnetic sub-networks, and efficient and accurate simulation of electromagnetic transient characteristics of multiple new energy stations of a regional power grid can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic transient simulation modeling of power systems, and in particular relates to a regional power grid multi-new energy station modeling simulation method and system based on ADPSS. Background Art

[0002] The penetration rate of new energy in new power systems continues to increase, squeezing out the power generation space of conventional units, and traditional synchronous rotating equipment is gradually replaced by power electronic equipment. New energy has the characteristics of low inertia and weak anti-interference performance. After large-scale access, the system operation characteristics have undergone profound changes, and it is urgent to carry out power system simulation analysis and safety and stability verification considering new energy.

[0003] The dynamic characteristics of power electronic equipment are generally in the microsecond level. The millisecond-level electromechanical simulation described by traditional phasors can no longer meet the requirements. It is necessary to introduce a three-phase microsecond-level electromagnetic simulation model to carry out new energy characteristic analysis. If the full electromagnetic simulation model is used to carry out new energy operation characteristic analysis, the simulation efficiency will be greatly reduced due to the large number of electromagnetic computing nodes and high computing dimensions. Summary of the invention

[0004] The present invention provides a regional power grid multi-new energy station modeling and simulation method and system based on ADPSS, which are used to solve the technical problem that the simulation efficiency is greatly reduced due to the large number of electromagnetic computing nodes and high computing dimensions.

[0005] In a first aspect, the present invention provides a regional power grid multi-new energy station modeling and simulation method based on ADPSS, comprising: Obtain the type and quantity of each unit in the new energy station, perform equalization on the models of the same type of new energy units according to the multiplication of each unit, and perform sub-circuit packaging on the multiplication model of each unit to obtain a multiplication packaging model of each unit; Connect different types of single-machine multiplication packaging models to the low-voltage side busbar of the new energy station grid connection point, connect them to the system busbar through the new energy station step-up transformer and station busbar resistor, and package the single station equivalent model to obtain the single station equivalent packaging model; Connect the electromechanical interfaces of each grid connection point to the corresponding single-station equivalent packaging model through the busbar, set the regional new energy simultaneous rate, and form a multi-station packaging model; In the PSASP single-line diagram, electromechanical-electromagnetic subgrid is performed, the system side is included in the electromechanical subgrid, and the regional multiple renewable energy stations are included in the electromagnetic subgrid. Based on the set faults in the PSASP program, a simulation study on the electromagnetic transient characteristics of regional multiple renewable energy stations is carried out, wherein the electromechanical subgrid adopts the electromechanical model, and the electromagnetic subgrid adopts the constructed multi-station packaging model.

[0006] In a second aspect, the present invention provides a regional power grid multi-new energy station modeling and simulation system based on ADPSS, comprising: The first packaging module is configured to obtain the type and quantity of a single unit in a new energy station, perform equalization on models of new energy units of the same type according to the single unit multiplication, and perform sub-circuit packaging on the single unit multiplication model to obtain a single unit multiplication packaging model; The second packaging module is configured to connect different types of single-machine multiplied packaging models to the low-voltage side busbar of the new energy station grid connection point, connect them to the system busbar through the new energy station step-up transformer and the station busbar resistor, and package the single station equivalent model to obtain the single station equivalent packaging model; A setting module is configured to connect the electromechanical interface of each grid connection point to the corresponding single-station equivalent packaging model through the bus, set the regional new energy simultaneous rate, and form a multi-station packaging model; The partitioning module is configured to perform electromechanical-electromagnetic sub-networking in the PSASP single-line diagram, the system side is divided into the electromechanical sub-network, and the regional multiple renewable energy stations are divided into the electromagnetic sub-network. Based on the set faults in the PSASP program, a simulation study on the electromagnetic transient characteristics of the regional multiple renewable energy stations is carried out, wherein the electromechanical sub-network adopts the electromechanical model, and the electromagnetic sub-network adopts the constructed multi-station packaging model.

[0007] According to a third aspect, an electronic device is provided, comprising: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the steps of the regional power grid multi-new energy station modeling and simulation method based on ADPSS according to any embodiment of the present invention.

[0008] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the program instructions are executed by a processor, the processor executes the steps of the regional power grid multi-new energy station modeling and simulation method based on ADPSS according to any embodiment of the present invention.

[0009] The ADPSS-based regional power grid multi-renewable energy station modeling and simulation method and system of the present application, by gradually constructing a single-machine multiplication model, a single-station equivalent model and a multi-station packaging model, measures the multiplication power and station power, and conducts hybrid simulation based on the electromechanical-electromagnetic sub-network, it can realize efficient and accurate simulation of the electromagnetic transient characteristics of multiple renewable energy stations in the regional power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 A flowchart of a regional power grid multi-new energy station modeling and simulation method based on ADPSS provided in one embodiment of the present invention; Figure 2 A structural block diagram of a regional power grid multi-new energy station modeling and simulation system based on ADPSS provided in one embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] See also Figure 1 , which shows a flow chart of a regional power grid multi-new energy station modeling and simulation method based on ADPSS of the present application.

[0014] like Figure 1 As shown, the regional power grid multi-new energy station modeling and simulation method based on ADPSS specifically includes the following steps: Step S101, obtain the type and quantity of single machines in the new energy station, perform equalization on the models of new energy units of the same type according to the single machine multiplication, and perform sub-circuit packaging on the single machine multiplication model to obtain the single machine multiplication packaging model.

[0015] In this step, the single-machine output current of the multiplication resistor is obtained, and the output current of the controlled three-phase current source is adjusted to N-1 times the single-machine current to obtain the output power of the single-machine multiplication model, and the output power is N times the single-machine power; the instantaneous values ​​of the first three-phase voltage and the first three-phase current output by the single-machine multiplication model are obtained, and the active power and reactive power output by the single-machine multiplication model are calculated according to the instantaneous values ​​of the first three-phase voltage and the first three-phase current; the single-machine multiplication model is encapsulated by a sub-circuit to form a single-machine multiplication encapsulation model.

[0016] Step S102, connect different types of single-machine multiplied packaging models to the low-voltage side busbar of the new energy station grid connection point, connect them to the system busbar through the new energy station step-up transformer and the station busbar resistor, and package the single station equivalent model to obtain a single station equivalent packaging model.

[0017] In this step, the instantaneous values ​​of the second three-phase voltage and the second three-phase current output by the multi-type new energy unit multiplication packaging model are obtained, and the active power and reactive power of the new energy station are calculated according to the instantaneous values ​​of the second three-phase voltage and the second three-phase current; the system resistance and the infinite power supply are connected to the high-voltage side bus of the new energy station grid connection point, and the two states are switched by the switch, wherein the switch is closed in the initial stage, and the voltage source controls the grid connection point bus voltage to drive the new energy model to start, and the switch is disconnected after a few seconds, switching to the electromechanical interface to interact with the new energy model; the sub-circuit is used to encapsulate the single station equivalent model to form a single station equivalent packaging model.

[0018] Step S103, connecting the electromechanical interfaces of each grid connection point to the corresponding single-station equivalent packaging model via the bus, setting the regional new energy simultaneity rate, and forming a multi-station packaging model.

[0019] In this step, the new energy simultaneity rate is set, and the new energy simultaneity rate is transmitted to all single-station equivalent packaging models to form a multi-station packaging model, wherein the multi-station packaging model adjusts the output of the controlled current source.

[0020] Step S104, perform electromechanical-electromagnetic sub-networking in the PSASP single-line diagram, include the electromechanical sub-network on the system side, and include the regional multiple renewable energy stations in the electromagnetic sub-network, and conduct a simulation study on the electromagnetic transient characteristics of the regional multiple renewable energy stations based on the set faults in the PSASP program, wherein the electromechanical sub-network adopts an electromechanical model, and the electromagnetic sub-network adopts the constructed multi-station packaging model.

[0021] In this step, in the single-line diagram subnetwork, the boundaries are divided into the transmission lines of each renewable energy station, and the renewable energy units and their box-type transformers and the step-up transformers in the station are classified into the electromagnetic subnetwork; the component-level dynamic characteristics are analyzed based on the simulation curves of the renewable energy station and its components in the ADPSS program, and the station-level dynamic characteristics are studied through the simulation curves of the renewable energy station transmission lines in the PSASP program.

[0022] In summary, the method of the present application, by gradually constructing a single-machine multiplication model, a single-station equivalent model and a multi-station packaging model, measures the multiplication power and station power, and conducts hybrid simulation based on the electromechanical-electromagnetic sub-network, it can achieve efficient and accurate simulation of the electromagnetic transient characteristics of multiple renewable energy stations in the regional power grid.

[0023] See also Figure 2 , which shows a structural block diagram of a regional power grid multi-new energy station modeling and simulation system based on ADPSS of the present application.

[0024] like Figure 2 As shown, the regional power grid multi-new energy station modeling and simulation system 200 includes a first encapsulation module 210, a second encapsulation module 220, a setting module 230 and a division module 240.

[0025] Among them, the first packaging module 210 is configured to obtain the type and quantity of the single machine of the new energy station, perform equivalent value on the new energy unit model of the same type according to the single machine multiplication, and perform sub-circuit packaging on the single machine multiplication model to obtain the single machine multiplication packaging model; the second packaging module 220 is configured to connect different types of single machine multiplication packaging models to the low-voltage side busbar of the new energy station grid connection point, connect to the system busbar through the new energy station step-up transformer and the station busbar resistor, and package the single station equivalent model to obtain the single station equivalent packaging model; the setting module 23 0, configured to connect the electromechanical interface of each grid-connected point to the corresponding single-station equivalent packaging model through the bus, set the regional new energy simultaneity rate, and form a multi-station packaging model; the division module 240 is configured to perform electromechanical-electromagnetic sub-networking in the PSASP single-line diagram, the system side is divided into the electromechanical sub-network, and the regional multi-new energy station is divided into the electromagnetic sub-network. Based on the set faults in the PSASP program, a simulation study on the electromagnetic transient characteristics of the regional multi-new energy station is carried out, wherein the electromechanical sub-network adopts the electromechanical model, and the electromagnetic sub-network adopts the constructed multi-station packaging model.

[0026] It should be understood that Figure 2 Modules and references documented in Figure 1 Therefore, the operations and features described above for the method and the corresponding technical effects are also applicable to Figure 2 The modules in it will not be described in detail here.

[0027] In other embodiments, the embodiments of the present invention further provide a computer-readable storage medium having a computer program stored thereon, and when the program instructions are executed by a processor, the processor executes the regional power grid multi-new energy station modeling and simulation method based on ADPSS in any of the above method embodiments; As an implementation mode, the computer-readable storage medium of the present invention stores computer-executable instructions, and the computer-executable instructions are configured as follows: Obtain the type and quantity of each unit in the new energy station, perform equalization on the models of the same type of new energy units according to the multiplication of each unit, and perform sub-circuit packaging on the multiplication model of each unit to obtain a multiplication packaging model of each unit; Connect different types of single-machine multiplication packaging models to the low-voltage side busbar of the new energy station grid connection point, connect them to the system busbar through the new energy station step-up transformer and station busbar resistor, and package the single station equivalent model to obtain the single station equivalent packaging model; Connect the electromechanical interfaces of each grid connection point to the corresponding single-station equivalent packaging model through the busbar, set the regional new energy simultaneous rate, and form a multi-station packaging model; In the PSASP single-line diagram, electromechanical-electromagnetic subgrid is performed, the system side is included in the electromechanical subgrid, and the regional multiple renewable energy stations are included in the electromagnetic subgrid. Based on the set faults in the PSASP program, a simulation study on the electromagnetic transient characteristics of regional multiple renewable energy stations is carried out, wherein the electromechanical subgrid adopts the electromechanical model, and the electromagnetic subgrid adopts the constructed multi-station packaging model.

[0028] The computer-readable storage medium may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the regional power grid multi-new energy station modeling and simulation system based on ADPSS, etc. In addition, the computer-readable storage medium may include a high-speed random access memory, and may also include a memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the regional power grid multi-new energy station modeling and simulation system based on ADPSS via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0029] Figure 3 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention, such as Figure 3 As shown, the device includes: a processor 310 and a memory 320. The electronic device may also include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330 and the output device 340 may be connected via a bus or other means. Figure 3 In the example, the connection through the bus is taken as an example. The memory 320 is the above-mentioned computer-readable storage medium. The processor 310 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 320, that is, the regional power grid multi-new energy station modeling and simulation method based on ADPSS in the above-mentioned method embodiment is realized. The input device 330 can receive input digital or character information, and generate key signal input related to user settings and function control of the regional power grid multi-new energy station modeling and simulation system based on ADPSS. The output device 340 may include display devices such as display screens.

[0030] The electronic device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0031] As an implementation mode, the electronic device is applied to a regional power grid multi-renewable energy station modeling and simulation system based on ADPSS, and is used for a client, including: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can: Obtain the type and quantity of each unit in the new energy station, perform equalization on the models of the same type of new energy units according to the multiplication of each unit, and perform sub-circuit packaging on the multiplication model of each unit to obtain a multiplication packaging model of each unit; Connect different types of single-machine multiplication packaging models to the low-voltage side busbar of the new energy station grid connection point, connect them to the system busbar through the new energy station step-up transformer and station busbar resistor, and package the single station equivalent model to obtain the single station equivalent packaging model; Connect the electromechanical interfaces of each grid connection point to the corresponding single-station equivalent packaging model through the busbar, set the regional new energy simultaneous rate, and form a multi-station packaging model; In the PSASP single-line diagram, electromechanical-electromagnetic subgrid is performed, the system side is included in the electromechanical subgrid, and the regional multiple renewable energy stations are included in the electromagnetic subgrid. Based on the set faults in the PSASP program, a simulation study on the electromagnetic transient characteristics of regional multiple renewable energy stations is carried out, wherein the electromechanical subgrid adopts the electromechanical model, and the electromagnetic subgrid adopts the constructed multi-station packaging model.

[0032] Through the description of the above implementation modes, those skilled in the art can clearly understand that each implementation mode can be implemented by means of software plus a necessary general hardware platform, or of course by hardware. Based on such an understanding, the above technical solution can essentially or in other words be embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A regional power grid multi-new energy station modeling and simulation method based on ADPSS, characterized in that: include: Obtain the type and quantity of each unit in the new energy station, perform equalization on the models of the same type of new energy units according to the multiplication of each unit, and perform sub-circuit packaging on the multiplication model of each unit to obtain a multiplication packaging model of each unit; Connect different types of single-machine multiplication packaging models to the low-voltage side busbar of the new energy station grid connection point, connect them to the system busbar through the new energy station step-up transformer and station busbar resistor, and package the single station equivalent model to obtain the single station equivalent packaging model; Connect the electromechanical interfaces of each grid connection point to the corresponding single-station equivalent packaging model through the busbar, set the regional new energy simultaneous rate, and form a multi-station packaging model; In the PSASP single-line diagram, electromechanical-electromagnetic subgrid is performed, the system side is included in the electromechanical subgrid, and the regional multiple renewable energy stations are included in the electromagnetic subgrid. Based on the set faults in the PSASP program, a simulation study on the electromagnetic transient characteristics of regional multiple renewable energy stations is carried out, wherein the electromechanical subgrid adopts the electromechanical model, and the electromagnetic subgrid adopts the constructed multi-station packaging model.

2. According to the ADPSS-based regional power grid multi-new energy station modeling and simulation method according to claim 1, it is characterized in that: The method of obtaining the type and quantity of a single unit in a new energy station, performing equalization on the models of new energy units of the same type according to the single unit multiplication, and performing sub-circuit packaging on the single unit multiplication model to obtain the single unit multiplication packaging model includes: Obtain the output current of the single machine of the multiplied resistor, adjust the output current of the controlled three-phase current source to N-1 times the current of the single machine, and obtain the output power of the single machine multiplied model, where the output power is N times the power of the single machine; Obtaining instantaneous values ​​of a first three-phase voltage and a first three-phase current output by the single-machine multiplication model, and calculating active power and reactive power output by the single-machine multiplication model according to the instantaneous values ​​of the first three-phase voltage and the first three-phase current; The single-machine multiplication model is encapsulated by using sub-circuits to form a single-machine multiplication encapsulation model.

3. According to the ADPSS-based regional power grid multi-new energy station modeling and simulation method according to claim 1, it is characterized in that: The method of connecting different types of single-machine multiplication packaging models to the low-voltage side busbar of the new energy station grid connection point, connecting to the system busbar through the new energy station step-up transformer and the station busbar resistor, and packaging the single station equivalent model to obtain the single station equivalent packaging model includes: Obtain the instantaneous values ​​of the second three-phase voltage and the second three-phase current output by the multi-type new energy unit multiplication packaging model, and calculate the active power and reactive power of the new energy station according to the instantaneous values ​​of the second three-phase voltage and the second three-phase current; Connect the system resistance and infinite power supply to the high-voltage busbar at the grid-connected point of the new energy station, and switch the two states through the switch. In the initial stage, the switch is closed, and the voltage source controls the busbar voltage at the grid-connected point to drive the new energy model to start. After a few seconds, the switch is disconnected and switched to the electromechanical interface to interact with the new energy model. The sub-circuit is used to encapsulate the single-station equivalent model to form a single-station equivalent encapsulation model.

4. According to the ADPSS-based regional power grid multi-new energy station modeling and simulation method according to claim 1, it is characterized in that: The electromechanical interface of each grid connection point is connected to the corresponding single-station equivalent packaging model via the bus, and the regional new energy simultaneous rate is set to form a multi-station packaging model, which includes: The new energy simultaneity rate is set, and the new energy simultaneity rate is transmitted to all single-station equivalent packaging models to form a multi-station packaging model, wherein the multi-station packaging model adjusts the output of the controlled current source.

5. According to the ADPSS-based regional power grid multi-new energy station modeling and simulation method according to claim 1, it is characterized in that: The electromechanical-electromagnetic sub-network is performed in the PSASP single-line diagram, the system side is divided into the electromechanical sub-network, and the regional multi-new energy station is divided into the electromagnetic sub-network. Based on the set faults in the PSASP program, the electromagnetic transient characteristics simulation research of the regional multi-new energy station is carried out, including: In the single-line diagram subnetwork, the boundaries are divided into the outgoing lines of each new energy station, and the new energy units and their box-type transformers and the step-up transformers in the station are classified into the electromagnetic subnetwork; The component-level dynamic characteristics are analyzed based on the simulation curves of the new energy station and its components in the ADPSS program, and the station-level dynamic characteristics are studied through the simulation curves of the new energy station transmission lines in the PSASP program.

6. A regional power grid multi-new energy station modeling and simulation system based on ADPSS, characterized in that: include: The first packaging module is configured to obtain the type and quantity of a single unit in a new energy station, perform equalization on models of new energy units of the same type according to the single unit multiplication, and perform sub-circuit packaging on the single unit multiplication model to obtain a single unit multiplication packaging model; The second packaging module is configured to connect different types of single-machine multiplied packaging models to the low-voltage side busbar of the new energy station grid connection point, connect them to the system busbar through the new energy station step-up transformer and the station busbar resistor, and package the single station equivalent model to obtain the single station equivalent packaging model; A setting module is configured to connect the electromechanical interface of each grid connection point to the corresponding single-station equivalent packaging model through the bus, set the regional new energy simultaneous rate, and form a multi-station packaging model; The partitioning module is configured to perform electromechanical-electromagnetic sub-networking in the PSASP single-line diagram, the system side is divided into the electromechanical sub-network, and the regional multiple renewable energy stations are divided into the electromagnetic sub-network. Based on the set faults in the PSASP program, a simulation study on the electromagnetic transient characteristics of the regional multiple renewable energy stations is carried out, wherein the electromechanical sub-network adopts the electromechanical model, and the electromagnetic sub-network adopts the constructed multi-station packaging model.

7. An electronic device, characterized in that: include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

Images