Power load management simulation system, method, equipment and medium

Abstract

The invention provides a power load management simulation system, method and device and a medium. The power load management simulation system comprises a digital simulator, hardware and simulation software under a unified specification standard. The hardware comprises a calculation unit, an actual physical device and a simulation interface under a unified specification standard; the simulation software is used for providing a digital model and a simulation environment required by simulation; the calculation unit is used for acquiring the operation data of the actual physical device according to the digital model and processing the data; the digital simulator is used for performing power load management simulation on the processed operation data in combination with a digital model; the simulation system provides hardware and simulation software which are unified in specification and standard, compatibility and stability of the system can be guaranteed, integration complexity is reduced, and real-time performance and accuracy of simulation results are improved. In the simulation method, a simulation link sequence and an implementation method of each link under a standard are provided, so that the correctness and credibility of a power load management simulation result are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power load simulation, and in particular to a power load management simulation system, method, equipment and medium. Background Art

[0002] Power load management simulation technology refers to the technology of modeling, analyzing and predicting the load of power system by using mathematical models and computer technology, which belongs to the basic problem of power system operation and control. At present, the research on power load management simulation technology mainly includes the following aspects: 1) Load modeling method. It determines the structure and parameters of the load model, thus affecting the overall accuracy. Common load modeling methods include static load model, dynamic load model, comprehensive load model, etc. 2) Load forecasting method, which refers to predicting the load in the future period based on historical data and influencing factors, so as to provide a reference for the operation and dispatch of the power system. Common load forecasting methods include statistical-based methods, artificial intelligence-based methods, combination-based methods, etc. 3) Load management strategy. Load management strategy is the application target of load management simulation technology. It can formulate reasonable load control and optimization plans based on load models and forecasting results, thereby improving the safe, economical and efficient operation of the power system. Common load management strategies include demand response, demand side management, demand side resources, etc.

[0003] Existing simulation technologies for power load management include "CN117055375A, a digital twin load management digital-physical hybrid simulation method and system", such as Figure 1 As shown in the figure, by integrating the digital twin and semi-physical simulation platform for simulation, the accuracy of the simulation is guaranteed, which can meet the needs of the power system to a certain extent. However, the system requires a large amount of data input and processing, as well as compatibility and integration with different physical devices and software platforms to realize the communication and control of the digital twin. However, there may be multiple specifications and standards for the hardware, software and interfaces of the simulation system. Therefore, the compatibility between multiple different physical devices and software platforms in the power system is difficult to guarantee. There may be problems with data format and communication protocol mismatch during the integration process, affecting the overall stable operation of the system; which may lead to poor credibility of the load management simulation results and difficulty in reflecting the true characteristics of the load. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the present invention proposes a power load management simulation system, comprising: a digital simulator, hardware, and simulation software under a unified specification standard running on the hardware; the hardware comprises a computing unit under a unified specification standard, an actual physical device, and a simulation interface, the computing unit is connected to the actual physical device through the simulation interface;

[0005] The simulation software is used to construct a digital model required for simulation based on a simulation request and provide a simulation environment for the digital simulator to perform simulation;

[0006] The actual physical device is used to construct a physical simulation environment required for simulation based on the simulation request, and to control the operation of the actual physical device in the physical simulation environment based on the digital model;

[0007] The computing unit is used to obtain the operating data of the actual physical device according to the digital model and perform data processing on the operating data;

[0008] The digital simulator is used to perform power load management simulation on the processed operating data in the simulation environment in combination with the digital model to obtain a simulation result corresponding to the simulation request.

[0009] Optionally, the simulation software includes a modeling environment, a digital model library and a simulation environment:

[0010] The modeling environment is used to perform custom modeling and configuration-based modeling according to the simulation request to obtain a digital model required for simulation;

[0011] The digital model library includes a pre-built original digital model, which is used to perform configuration modeling in the modeling environment to build a digital model required for simulation based on the simulation request and the original digital model;

[0012] The simulation environment is used to provide an environment for the digital simulator to perform simulation based on the simulation request.

[0013] Optionally, the power load simulation includes one or more of the following: load timing simulation, distributed power supply operation timing simulation, user energy usage scenario simulation, digital power grid simulation, load management strategy simulation, load trading service simulation, virtual power plant precise regulation simulation, and load source, grid, load and storage coordinated control simulation.

[0014] Optionally, the digital model includes one or more of the following: a load characteristic model for simulating the user's load operation characteristics, a load adjustable potential model for regulating the user's power distribution, and a load control strategy model for regulating the equipment operation strategy.

[0015] Optionally, the actual physical device includes: interconnected customer power supply and utilization system simulation equipment, a physical simulation environment integrated measurement and control cabinet, and an intelligent device test bench;

[0016] The customer power supply and utilization system simulation device is used to construct a physical simulation environment required for simulation based on the simulation request;

[0017] The smart device test bench is used to provide an interface to connect a specific smart device to the physical simulation environment based on the simulation request;

[0018] The physical simulation environment integrated measurement and control cabinet is used to control the operation of the specific intelligent device and the customer power supply and utilization system simulation equipment in the physical simulation environment based on the digital model.

[0019] Optionally, the computing unit includes several core computing components;

[0020] The core computing components realize real-time data transmission and real-time processing through high-speed communication;

[0021] Each of the core computing components is communicatively connected with the actual physical device and the digital simulator via the simulation interface;

[0022] The core computing component includes one of the following: a central processing unit, a digital signal processor and a field programmable gate array.

[0023] Optionally, the simulation interface includes:

[0024] A physical signal interface, used for physical signal interaction between the digital model and the actual physical device, so as to realize control of the actual physical device by the digital model;

[0025] A communication interface for realizing digital signal interaction between the digital simulators and data interaction between the computing unit and the actual physical device;

[0026] A power interface, used to realize the interaction of physical signals between the actual physical devices;

[0027] A unified interface standard is set for the physical signal interface, the communication interface and the power interface respectively.

[0028] Optionally, the simulation software also includes a human-computer interface for users to edit parameters of the digital model, manage simulation case archives and files, provide real-time simulation process monitoring, and display the simulation results.

[0029] Based on the above inventive concept, the present invention proposes a power load management simulation method, comprising:

[0030] Obtain a simulation request for power load management, and build simulation software and configure hardware in the simulation system based on a simulation scenario corresponding to the simulation request, requirements for simulation performance, and simulation capabilities of a digital simulator in the simulation system;

[0031] Constructing an initial digital model required for simulation in the simulation software according to the simulation request, and verifying the initial simulation model to obtain a digital model that meets the simulation design requirements;

[0032] Based on the simulation request, a simulation experiment is performed in the simulation system using the digital model to obtain an initial simulation result, and the initial simulation result is checked to obtain a simulation result that meets the expected deviation;

[0033] The digital model, the simulation object in the simulation request, the process data of the simulation experiment and the simulation result are compiled into a simulation report.

[0034] Optionally, the step of constructing simulation software and configuring hardware in the simulation system based on the simulation scenario corresponding to the simulation request, the requirement for simulation performance, and the simulation capability of the digital simulator in the simulation system includes:

[0035] Determine the simulation scale, simulation step size and model refinement based on the simulation request and the simulation capability of the digital simulator in the simulation system;

[0036] Constructing simulation software that supports the simulation scale, the simulation step size, and the model precision;

[0037] The hardware in the simulation system is configured based on the simulation scale, the simulation scenario corresponding to the simulation request, and the requirement for simulation performance.

[0038] Optionally, configuring the hardware in the simulation system based on the simulation scale, the simulation scenario corresponding to the simulation request, and the requirement for simulation performance includes:

[0039] Configure a computing unit based on the simulation scale and the requirements of the simulation scenario corresponding to the simulation request on the operation and simulation performance of the simulation system;

[0040] Configuring an actual physical device based on a simulation scenario corresponding to the simulation request and requirements for simulation performance;

[0041] configuring a simulation interface based on the requirements of the digital model and the input and output signals of the actual physical device;

[0042] The computing unit and the actual physical device are connected via the simulation interface to form the hardware of the simulation system.

[0043] Optionally, configuring an actual physical device based on a simulation scenario corresponding to the simulation request and a requirement for simulation performance includes:

[0044] If the simulation request includes device debugging and performance testing, the actual physical device corresponding to the test should be configured;

[0045] If an AC / DC control and protection system having a dominant influence on the power grid state quantity is configured in the simulation scenario, then according to the simulation request's requirements on simulation performance, an actual physical device corresponding to the AC / DC control and protection system is configured;

[0046] In addition to the device debugging, performance testing and the AC / DC control and protection system, the actual physical device uses a digital model that is consistent with its own characteristics.

[0047] Optionally, verifying the initial simulation model to obtain a digital model that meets the simulation design requirements includes:

[0048] Adjusting the operation mode of the simulation operation of the initial digital model to be consistent with the comparison object;

[0049] Performing simulation under the operating mode to obtain a simulation curve of the initial digital model;

[0050] The simulation curve of the initial digital model is compared with the theoretical curve of the comparison object to obtain a deviation value, and a digital model that meets the simulation design requirements is obtained according to the deviation value and the deviation threshold.

[0051] Optionally, the checking the initial simulation result to obtain a simulation result that meets the expected deviation includes:

[0052] Determining a qualitative verification result of the simulation result based on a deviation between the simulation result and the result to be compared;

[0053] Based on the simulation result and the result to be compared, a credibility quantification index of the simulation result is calculated by using a residual analysis or a characteristic quantity analysis method to obtain a quantitative verification result of the simulation result;

[0054] Determine whether the simulation result exceeds the expected deviation according to the qualitative verification result or the quantitative verification result, and if so, re-perform the simulation test to obtain the simulation result until the simulation result meets the expected deviation;

[0055] The result to be compared includes one of the following: actual power grid execution recording, field test recording, non-real-time simulation result and theoretical analysis result.

[0056] In another aspect, the present application further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0057] The memory is used to store one or more programs;

[0058] When the one or more programs are executed by the at least one processor, an electric power load management simulation method as described above is implemented.

[0059] On the other hand, the present application also provides a computer-readable storage medium having an execution program stored thereon, and when the execution program is executed, the power load management simulation method as described above is implemented.

[0060] Compared with the closest prior art, the present invention has the following beneficial effects:

[0061] The present invention provides a power load management simulation system, comprising: a digital simulator, hardware, and simulation software under a unified specification standard running on the hardware; the hardware comprises a computing unit under a unified specification standard, an actual physical device, and a simulation interface, the computing unit being connected to the actual physical device via the simulation interface; the simulation software being used to construct a digital model required for simulation based on a simulation request, and providing a simulation environment for the digital simulator to perform simulation; the actual physical device being used to construct a physical simulation environment required for simulation based on the simulation request, and controlling the operation of the actual physical device in the physical simulation environment based on the digital model; the computing unit being used to obtain the operation information of the actual physical device according to the digital model; row data, and performs data processing on the operation data; the digital simulator is used to perform power load management simulation on the processed operation data in combination with the digital model in the simulation environment, and obtain a simulation result corresponding to the simulation request; the simulation system of the present invention provides hardware and simulation software using unified specifications and standards, which can ensure the compatibility between the actual physical devices, computing units and simulation software in the hardware, so that the system as a whole can operate stably, and the unified specifications of the simulation interface can reduce the complexity of integration, that is, it can ensure that the data format and communication protocol match during the integration process, improve the real-time and accuracy of the simulation results, so that the simulation system can accurately reflect the real characteristics of the load and meet the stable, safe and efficient operation of the power system.

[0062] The present invention provides a method for simulating power load management, comprising: obtaining a simulation request for power load management, and constructing simulation software and configuring hardware in the simulation system based on a simulation scenario corresponding to the simulation request, requirements for simulation performance, and simulation capabilities of a digital simulator in the simulation system; constructing an initial digital model required for simulation in the simulation software according to the simulation request, and verifying the initial simulation model to obtain a digital model that meets the simulation design requirements; based on the simulation request, performing a simulation experiment in the simulation system using the digital model to obtain an initial simulation result, and verifying the initial simulation result to obtain a simulation result that meets the expected deviation; the present invention provides a sequence of each link in the simulation method and a unified standard simulation method in each link, which is conducive to ensuring the correctness and credibility of the power load management simulation method and results; it is convenient to achieve comparability of two simulation systems under the same specification standard, so that the simulation technology of power load management can be effectively compared and evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a flow chart of a digital-physical hybrid simulation method for load management of digital twin;

[0064] Figure 2 A schematic diagram of the structure of a power load management simulation system provided by the present invention;

[0065] Figure 3 A schematic diagram of a power load management simulation method provided by the present invention Figure 1 ;

[0066] Figure 4 A schematic diagram of a power load management simulation method provided by the present invention Figure 2 ;

[0067] Figure 5 The present invention provides a schematic structural diagram of an electronic device. DETAILED DESCRIPTION

[0068] Although the existing power load management simulation system and method can meet the needs of the power system to a certain extent, due to the lack of standard specifications for the hardware, interface and process requirements of the load management simulation system, the compatibility between different physical devices and software platforms in the power system and the simulation results obtained through the process are difficult to guarantee, which may lead to the mismatch of data format and communication protocol during the integration process, affecting the overall stable operation of the system; the inconsistent interface will increase the complexity of integration, affect the real-time and accuracy of the simulation results, and ultimately lead to the lack of stability and reliability of the simulation system. In addition, the simulation system needs to be continuously updated and maintained to adapt to the changes and development of the current power system.

[0069] At the same time, the existing power load management simulation methods lack a unified load management simulation technical specification system and lack the content of load management simulation technical specifications that adapt to the changes in the power system, resulting in poor credibility of power load management simulation results, difficulty in reflecting the true characteristics of the load, and difficulty in meeting the needs of safe, economical and efficient operation of the power system. Its shortcomings are specifically manifested in: 1) Lack of hardware and operating environment requirements for power load management simulation systems. At present, there is no unified specification and standard for the hardware and operating environment of load management simulation systems at home and abroad, resulting in poor reliability, compatibility and interoperability of load management simulation systems. 2) Lack of functional requirements for load management simulation systems. At present, there is no complete system and framework for the functional requirements of load management simulation systems at home and abroad, resulting in incomplete functional coverage of load management simulation systems, poor functional effects, and difficult to measure and compare performance levels. 3) Lack of process requirements for load management simulation systems. At present, there is no unified process specification for load management simulation systems at home and abroad, resulting in low process efficiency and process quality of the system, and the simulation results obtained are difficult to be widely accepted, compared and verified.

[0070] In order to overcome the above problems and to carry out power load management simulation in accordance with the requirements of safety, reliability, economy and practicality, the present invention provides a power load management simulation system and method.

[0071] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0072] Example 1

[0073] The present invention provides a power load management simulation system, such as Figure 2 As shown, it includes: a digital simulator, hardware, and simulation software under a unified specification standard running on the hardware; the hardware includes a computing unit under a unified specification standard, an actual physical device, and a simulation interface, and the computing unit is connected to the actual physical device through the simulation interface;

[0074] The simulation software is used to construct a digital model required for simulation based on a simulation request and provide a simulation environment for the digital simulator to perform simulation;

[0075] The actual physical device is used to construct a physical simulation environment required for simulation based on the simulation request, and to control the operation of the actual physical device in the physical simulation environment based on the digital model;

[0076] The computing unit is used to obtain the operating data of the actual physical device according to the digital model and perform data processing on the operating data;

[0077] The digital simulator is used to perform power load management simulation on the processed operating data in the simulation environment in combination with the digital model to obtain a simulation result corresponding to the simulation request.

[0078] In the simulation system architecture, the power load simulation system hardware and simulation software are generally required to meet the following requirements:

[0079] a) Hardware should be equipped with computing units, simulation interfaces and actual physical devices according to different simulation scenarios such as power system simulation requests, device debugging and performance testing;

[0080] b) The simulation software should be able to configure the simulation scale and simulation step, and be able to coordinate the real-time digital simulator, simulation interface, digital simulation model (i.e. digital model) and actual physical device for digital simulation, and should meet the real-time, synchronization and stability requirements of digital simulation.

[0081] 1. Regarding the hardware in the simulation system:

[0082] (1) Calculation units under unified standards

[0083] The computing unit should have real-time digital simulation capabilities, specifically:

[0084] The computing unit includes several core computing components;

[0085] The core computing components can realize real-time data transmission and real-time processing through high-speed communication; the computing unit includes two forms: multi-core processor and multi-processor. The multi-core processor or multi-processor has high-speed communication capability, and can realize real-time digital simulation of power system through modular expansion and parallel computing;

[0086] The core computing component includes one of the following: a processor with strong computing capability, such as a central processing unit (CPU), a digital signal processor (DSP), and a field programmable gate array (FPGA).

[0087] Each of the core computing components is communicatively connected with the actual physical device and the digital simulator via the simulation interface;

[0088] At the same time, the calculation unit under the unified standard should also meet the following requirements:

[0089] The computing unit should be able to complete single-step calculation of digital models, simulation interface reading and writing, clock synchronization and other operations within a single simulation step time;

[0090] The computing unit should have the ability to interact with the simulation interface to input / output data. The interface connection should adopt data bus, optical fiber communication and other methods;

[0091] The computing unit should have the ability to concurrently input / output data with multiple simulation interfaces and ensure the synchronization between multiple simulation interfaces;

[0092] The computing unit should have an expansion interface and the ability to perform joint simulation with other digital simulators. The simulation system may include multiple digital simulators.

[0093] The computing unit receives data from the actual physical device and processes it according to the simulation model (a type of digital model). The processed results can be used to control the actual physical device to form a closed-loop feedback system. Real-time interaction: In many applications, the computing unit needs to process the input data of the physical device in real time and quickly generate output signals to control the physical device to ensure the real-time and accuracy of the system.

[0094] (2) Actual physical device under unified standard

[0095] The actual physical device includes: interconnected customer power supply and utilization system simulation equipment, physical simulation environment comprehensive measurement and control cabinet and intelligent device test bench;

[0096] The customer power supply and utilization system simulation device is used to build the physical simulation environment required for the simulation based on the simulation request; therefore, the customer power supply and utilization system simulation device in the simulation system should meet the requirements for building a physical simulation environment for multiple application scenarios including power grid simulation, multi-type energy load simulation, etc., and have scene simulation functions such as typical faults and load regulation;

[0097] The intelligent device test bench is used to provide an interface based on the simulation request to connect a specific intelligent device to the physical simulation environment; specifically, it is used to place and simulate various new types of load control, power safety monitoring and other intelligent devices, provide an IO (Input / Output) interface, and connect the intelligent device to the physical simulation environment; and can execute various control algorithms issued by the digital model and perform real-time monitoring and dynamic parameter adjustment on the actual physical device;

[0098] The physical simulation environment integrated measurement and control cabinet is used to control the operation of the specific intelligent device and the customer power supply and utilization system simulation equipment in the physical simulation environment based on the digital model; that is, it supports the execution of various control algorithms downloaded from the digital model in the simulation environment, and supports the monitoring and dynamic parameter adjustment of physical simulation environment variables;

[0099] The customer's power supply and utilization system simulation equipment provides a basic power grid simulation environment. The physical simulation environment integrated measurement and control cabinet executes control algorithms and performs monitoring and adjustments on this basis, while the intelligent device test bench focuses on testing specific intelligent devices and works in coordination with each other.

[0100] The actual physical device also includes a real-time / historical data server, which is used to deploy a simulation-specific real-time model database, realize the real-time integration of scientific simulation computing systems, digital simulation environments, physical simulation environments and third-party system data in the simulation system, support the storage and query of historical simulation results, and the import, storage and query of power grid companies and third-party data resources.

[0101] (3) Simulation interface under unified standard

[0102] The simulation interface includes a physical signal interface, a communication interface and a power interface, and unified interface standards are set for the physical signal interface, the communication interface and the power interface respectively.

[0103] The physical signal interface is used for the physical signal interaction between the digital model and the actual physical device to realize the control of the actual physical device by the digital model. Specifically, the physical signal interface has the ability to interact with the input / output data of the digital model and the actual physical device in real time, and the physical signal interface in the simulation system should also comply with the following provisions:

[0104] a) The physical signal interface function, conversion accuracy and delay should meet the requirements of the simulation scenario;

[0105] b) The number of input / output channels of the physical signal interface should be configurable and expandable;

[0106] c) When a power amplifier is used to convert a weak current signal into a strong current signal output, the overall error of the physical signal interface and the power amplifier should meet the requirement of "not introducing simulation errors within the design allowable range".

[0107] A communication interface is used to realize digital signal interaction between the digital simulators and data interaction between the computing unit and the actual physical device; the communication interface should meet the requirements of the national standard GB / T40601-2021, and the communication interface should support MQTT (Message Queuing Telemetry Transport, a message transmission protocol), Modbus (an industrial communication protocol) and other protocols, and flexibly adapt to the hardware equipment communication interface.

[0108] The power interface is used to realize the interaction of physical signals between the actual physical devices; the power interface should adopt a network decoupling interface model and be connected to the actual physical device through a four-quadrant power interface.

[0109] 2. For the simulation software in the simulation system:

[0110] The simulation software includes a modeling environment, a digital model library and a simulation environment:

[0111] The modeling environment is used to perform custom modeling and configuration-based modeling according to the simulation request to obtain the digital model required for the simulation; according to the scale and accuracy requirements of the simulation scenario, the electromagnetic transient or electromagnetic transient small-step modeling method is adopted, and the electromechanical transient modeling method can be selected when only the power frequency characteristics are concerned. When there are multiple modeling methods, they should be solved jointly through multi-rate simulation;

[0112] The digital model library includes a pre-built original digital model, which is used to perform configuration-based modeling in the modeling environment based on the simulation request and the original digital model to build a digital model required for simulation; and supports user-defined modeling;

[0113] The simulation environment is used to provide an environment for the digital simulator to perform simulation based on the simulation request, and to provide a platform for setting and running simulation scenarios, including defining the structure, parameters and operating conditions of the power system.

[0114] The simulation software also includes a human-computer interface. The simulation system uses a graphical human-computer interface and supports mainstream operating systems such as Windows and Linux. It is used for users to edit the parameters of the digital model, simulation conditions, manage simulation case archives and files, provide real-time simulation process monitoring, and display the simulation results.

[0115] In the simulation system, the simulation software, hardware and digital simulator are combined to perform power load simulation, and the power load simulation includes one or more of the following (i.e., multiple simulation functions): load timing simulation, distributed power supply operation timing simulation, user energy usage scenario simulation, digital power grid simulation, load management strategy simulation, load trading service simulation, virtual power plant precision control simulation and load source grid load storage coordinated control simulation. Specifically:

[0116] Load operation timing simulation should be able to generate various types of user load operation timing simulation, simulate load data of different types and industries, and support the timing occurrence of no less than 1,000 loads on a single machine.

[0117] Distributed power generation operation timing simulation should be able to generate various types of distributed power generation operation timing simulations, simulate the operation data of distributed photovoltaics, distributed wind turbines, energy storage, etc., and a single machine should support the operation timing of no less than 100 distributed power sources.

[0118] User energy usage scenario simulation should be able to carry out online simulation of typical customer energy usage equipment at multiple voltage levels, simulate the user's power grid structure, and support refined digital-physical hybrid simulation from the customer's power supply line to the important loads at the end. The single simulation analysis and evaluation time should be less than 1 minute, and the single evaluation calculation time should be less than 10 minutes.

[0119] Digital grid simulation should have the function of conducting online simulation of regional power grids, support the construction and operation simulation of 220kV and below main distribution network environments, and support the access simulation of loads and distributed power sources.

[0120] Load management strategy simulation should have the functions of building models and methods such as load single and cluster regulation characteristics, analysis of layered and zoned adjustable and controllable potential, and regulation baseline identification. It should have the functions of simulating and emulating load management scenarios such as large-scale load participation in demand response and orderly power consumption in different scenarios, and simulating the impact of load regulation on the power grid. It should support the setting of operating boundary conditions such as different weather conditions and holidays; it can also simulate the regulation targets of the power grid, issue instructions to the smart energy units, and simulate and verify the regulation strategies of the smart energy units.

[0121] Load trading service simulation should have the trading functions of load forecasting and trading price forecasting, and can flexibly adjust the types of electricity market trading products, trading rules, types of participating entities and basic parameter configurations. It should be able to adapt to the feasibility, effectiveness and adaptability of load participation in market transactions under different rules.

[0122] The simulation of precise control of virtual power plants should have the simulation functions of precise control and operation optimization strategies of customer-side source, grid, load and storage resources at multiple time scales such as seconds, minutes, hours, intraday and day-ahead. It should have the simulation functions of virtual power plants participating in demand response, peak load and frequency regulation, spot market, etc.

[0123] The load source, grid, load and storage coordinated control simulation should have the function of simulating basic scenarios of source, grid, load and storage on the user side, configure different parameters, take autonomous operation and economic operation as the goal, realize the coordinated control simulation between source, grid, load and storage, output coordinated control strategies, and guide users to reasonably configure different resources and design operation modes.

[0124] In addition, the simulation software should support refined digital-physical hybrid simulation from the customer's power supply line to the important terminal load, with a single simulation analysis and evaluation time of less than 1 minute and a single evaluation calculation time of less than 10 minutes.

[0125] The digital model in the simulation system includes one or more of the following: a load characteristic model for simulating the user's load operation characteristics, a load adjustable potential model for regulating the user's power distribution, and a load control strategy model for regulating the equipment operation strategy. Specifically:

[0126] The load characteristic model is used to provide a refined simulation model for segmented customers based on customer power data, meteorological data, and economic data, etc., by using big data analysis methods, and can characterize the operating characteristics of customer load resources. The load model for simulation users should adopt a typical static load model that includes static load characteristics, and a dynamic load model can be used for industries and regions;

[0127] The load adjustable potential model should integrate electricity consumption, meteorological, economic and other data, and be subdivided into industrial, commercial and residential adjustable load potential models based on the fusion of model-driven and data-driven, and micro-meso-macro cross-validation methods;

[0128] The load control strategy model is used to adjust and control user-side equipment by adopting voltage-type, current-type, frequency-type and other control strategies for industrial users' production loads and non-production loads, commercial and residential building air-conditioning loads, lighting equipment loads and other equipment, in combination with the real-time operating status of user equipment, to construct equipment-level, user-level and regional-level load control strategy models.

[0129] A power load management simulation system of the present invention provides hardware and simulation software under unified standard specifications, and specifically provides specifications for the simulation system architecture, including general requirements, hardware standards and simulation software standards, wherein the hardware standards include standards for actual physical devices, computing units and simulation interfaces, and the simulation software standards include modeling environment, digital model construction and function and performance requirements. Through the simulation software and hardware under unified standard specifications in the simulation system, the compatibility between the actual physical devices, computing units and simulation software in the hardware can be guaranteed, so that the system as a whole can run stably, and the unified specifications of the simulation interface can reduce the complexity of integration, that is, the problem of mismatch between data format and communication protocol during the integration process, improve the real-time and accuracy of the simulation results, so that the simulation system can accurately reflect the real characteristics of the load and meet the safe and efficient operation of the power system. At the same time, it is stipulated that a variety of simulation functions can be realized through the combination of software and hardware in the simulation system, so that the functions of the simulation system are fully covered and can meet the requirements of various simulation functions.

[0130] Example 2

[0131] Based on the above-mentioned power load management simulation system, the present invention provides a power load management simulation method, such as Figure 3 As shown, including:

[0132] S1. Obtain a simulation request for power load management, and build simulation software and configure hardware in the simulation system based on the simulation scenario corresponding to the simulation request, the requirements for simulation performance, and the simulation capability of the digital simulator in the simulation system;

[0133] S2. constructing an initial digital model required for simulation in the simulation software according to the simulation request, and verifying the initial simulation model to obtain a digital model that meets the simulation design requirements;

[0134] S3, based on the simulation request, using the digital model to perform a simulation experiment in the simulation system to obtain an initial simulation result, and verifying the initial simulation result to obtain a simulation result that meets the expected deviation;

[0135] S4. Compile the digital model, the simulation object in the simulation request, the process data of the simulation experiment and the simulation result into a simulation report.

[0136] Combination Figure 4 The power load management simulation method provided by the present invention is specifically described. The simulation process under the unified specification standard is generally required to include multiple links: hardware environment construction (configuring the hardware in the simulation system), software environment construction (building simulation software), initialization startup and verification, simulation experiment, simulation result verification, simulation result display and simulation report preparation, and multiple links in the entire simulation process should comply with GB / T 7261 (this standard is a national standard on basic test methods for relay protection and safety automatic devices), GB / T 22384 (this standard involves test methods for specific equipment or systems in power system simulation) and GB 38755 (this standard involves test and verification methods for specific aspects of power system simulation). Compliance with these standards ensures the standardization of the simulation process and helps to improve the credibility and comparability of the simulation results.

[0137] In step S1, S11, a simulation request for power load management is obtained.

[0138] S12: configuring the hardware in the simulation system based on the simulation scale, the simulation scenario corresponding to the simulation request, and the requirement for simulation performance.

[0139] 1) Based on the simulation scale and the simulation scenario corresponding to the simulation request, the computing unit is configured to meet the requirements of the simulation system operation and simulation scale and simulation performance. That is, the computing unit should meet the requirements of the simulation system operation, simulation scale and simulation performance.

[0140] 2) Configuring actual physical devices based on the simulation scenario corresponding to the simulation request and the requirements for simulation performance, including configuring the types and quantities of the actual physical devices.

[0141] If the simulation request includes device debugging and performance testing, the actual physical device corresponding to the test should be configured;

[0142] If an AC / DC control and protection system having a dominant influence on the power grid state quantity is configured in the simulation scenario, then according to the simulation request's requirements on simulation performance, an actual physical device corresponding to the AC / DC control and protection system is configured;

[0143] In addition to the device debugging, performance testing and the AC / DC control and protection system, the actual physical device uses a digital model that is consistent with its own characteristics.

[0144] Specifically, the simulation analysis before and after the execution of load management should meet the following requirements: the AC / DC control and protection systems that have a dominant influence on the transient and dynamic processes of grid state quantities such as grid voltage, power, and frequency after the execution of load management should be connected to the corresponding actual physical devices according to the requirements of the simulation performance of the simulation request; the rest can use built-in or external digital models that are consistent with the characteristics of the actual physical devices;

[0145] In addition, the simulation analysis of load operation characteristics should meet the following requirements: large-capacity DC control and protection devices, reactive power compensation devices, new energy power generation converter control devices, and other AC and DC control and protection systems that significantly affect the operation characteristics of the power grid and lack the accuracy of digital models should be connected to the corresponding actual physical devices according to the requirements of the simulation performance for the simulation request; the rest can use built-in or external digital models consistent with the characteristics of the actual physical devices.

[0146] That is, the configuration of the actual physical device should be carried out according to the simulation scenario and performance requirements to ensure that during device debugging, performance testing, load management execution before and after analysis, and load operation characteristics analysis, the necessary actual physical device can be connected or a digital model consistent with its characteristics can be used to ensure the accuracy and reliability of the simulation results.

[0147] 3) Configure the simulation interface based on the requirements of the input / output signals of the digital model and the actual physical device. That is, the types and quantities of the physical signal interface, communication interface and power interface in the simulation interface should be configured according to the requirements of the input / output signals of the digital model and the actual physical device, and the simulation interface should comply with all parts of GB / T26865 (a standard that specifies the data transmission protocol of the real-time dynamic monitoring system of the power system) and DL / T 860 (China's power industry standard).

[0148] 4) Connecting the computing unit and the actual physical device via the simulation interface to form the hardware of the simulation system.

[0149] S13, determining the simulation scale, simulation step and model precision based on the simulation request and the simulation capability of the digital simulator in the simulation system; and constructing simulation software that supports the simulation scale, the simulation step and the model precision.

[0150] The equivalent method of the simulation system can be selected according to the simulation requirements. The equivalent method can be divided into equivalent power supply, dynamic equivalent, broadband equivalent, etc. When equivalent exists, the dynamic characteristics of the power system should be consistent before and after the equivalent. The equivalent method is used to handle the simulation of large-scale power systems and reduce the calculation complexity by simplifying the model. When performing equivalent, it is necessary to ensure that the dynamic characteristics of the power system before and after the equivalent remain consistent to ensure the accuracy of the simulation results.

[0151] In step S2, an initial digital model required for simulation is constructed in the simulation software according to the simulation request, and the initial simulation model is verified to obtain a digital model that meets the simulation design requirements.

[0152] S21. Based on the simulation request, a simulation model required for a specific simulation is built in the simulation software. The simulation model includes a load characteristic model, a load adjustable potential model, a load control strategy model, etc. The simulation model is a type of digital model. The simulation model built here is recorded as an initial digital model.

[0153] S22, initializing and starting the simulation system.

[0154] For AC / DC hybrid power systems, the AC system should be initialized first, and then the DC system;

[0155] The AC system of power electronic equipment should initialize the conventional AC model first, and then initialize the power electronic equipment.

[0156] S23. Verification of the correctness of the simulation model. This should be verified through simulation curves, offline simulation results or theoretical curves. The deviation of the simulation curves should meet the design requirements. The simulation curves are simulation results.

[0157] Specifically, verifying the initial simulation model to obtain a digital model that meets the simulation design requirements includes:

[0158] Adjusting the operation mode of the simulation operation of the initial digital model to be consistent with the comparison object;

[0159] Performing simulation under the operating mode to obtain a simulation curve of the initial digital model;

[0160] Collect recorded data, offline simulation results and theoretical curves of actual equipment (operating parameters of the actual power grid in the power system), compare the simulation curve of the initial digital model with the theoretical curve of the comparison object, obtain the deviation value, and record the deviation value, and obtain a digital model that meets the simulation design requirements based on the deviation value and the deviation threshold.

[0161] In step S3, based on the simulation request, a simulation experiment is performed in the simulation system using the digital model to obtain an initial simulation result, and the initial simulation result is checked to obtain a simulation result that meets the expected deviation.

[0162] S31. Based on the simulation request, use the digital model to perform a simulation experiment in the simulation system to obtain an initial simulation result.

[0163] S32, verifying the initial simulation result to obtain a simulation result that meets the expected deviation, including:

[0164] The verification of simulation results (verification of the credibility of simulation results) is divided into qualitative analysis and quantitative analysis;

[0165] Determine the qualitative verification result of the simulation result based on the deviation between the simulation result and the result to be compared; the qualitative analysis can be performed by the user to determine the credibility of the simulation result based on observation and experience;

[0166] Based on the simulation result and the result to be compared, a credibility quantification index of the simulation result is calculated by using a residual analysis or a characteristic quantity analysis method to obtain a quantitative verification result of the simulation result;

[0167] Determine whether the simulation result exceeds the expected deviation according to the qualitative check result or the quantitative check result. If so, re-perform the simulation test (re-analyze the simulation logic and re-perform the simulation experiment) to obtain the simulation result until the simulation result meets the expected deviation;

[0168] The result to be compared includes one of the following: actual power grid execution recording, field test recording, non-real-time simulation result and theoretical analysis result.

[0169] The verification of simulation results is divided into static verification and dynamic verification. Static verification includes: the simulated static currents such as key bus voltage, main renewable energy output, total power load, and grid current distribution should be consistent with the grid operating conditions, and the error between the simulation results and the reference value (results to be compared) should meet the requirements of the test outline; dynamic verification includes: the simulated dynamic response conditions such as the amplitude of state quantity change, frequency characteristics, and short-circuit current level should be consistent with the simulation object; when there are comparison conditions, the error between the simulation results and the reference value (results to be compared) should meet the requirements of the test outline.

[0170] In step S4, the digital model, the simulation object in the simulation request, the process data of the simulation experiment and the simulation result are compiled into a simulation report.

[0171] Specifically, the contents of the simulation report should include: simulation scenario, simulation object in the simulation request, process data of the simulation test, simulation results, digital model and adjustment records.

[0172] The existing power load management simulation technology lacks a unified technical specification system, lacks technical specification content that adapts to changes in the power system, and lacks technical specification evaluation that considers multiple factors. The present invention provides a power load management simulation system and method, which takes into account the structural changes of the power system and major changes in load characteristics, updates and optimizes the methods under the standard specifications of each link in the power load management simulation method, and provides a unified standard construction and operation method for the hardware, software, environment construction, result verification, report preparation and other contents of the power load management simulation from two aspects: the system architecture and the process links of the simulation method. By providing a simulation method under a unified standard, the authenticity of the power load management simulation results can be guaranteed, the comparability and extensibility of the simulation technology can be improved, and effective comparison and evaluation can be made between power load management simulation technologies;

[0173] The present invention establishes a power load management simulation technology specification system (simulation system and simulation process under unified specification standards) to standardize the process, model, parameters, evaluation and other aspects of power load management simulation, which is conducive to ensuring the correctness and credibility of the power load management simulation method and results, and can improve the scientificity and effectiveness of power load management simulation technology;

[0174] The method designed through technical specifications of each link can flexibly respond to structural changes and load characteristics of the power system, so that it can adapt to new demands and new challenges of the power system; it improves the adaptability and advantages of power load management simulation technology; and by stipulating unified hardware and software construction standards and technical specifications of each process link, it can improve the efficiency and quality of the simulation method.

[0175] Example 3

[0176] like Figure 5 As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected via a bus; the memory may be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory may also be used to store data, which may be called and / or modified when the instructions are executed.

[0177] The processor may be a central processing unit (CPU), or 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. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in a storage medium to implement the corresponding method flow or corresponding functions, so as to implement the steps of a power load management simulation method in the above-mentioned embodiment.

[0178] Example 4

[0179] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in an electronic device for storing programs and data. It can be understood that the storage medium here can include both built-in storage media in electronic devices and, of course, extended storage media supported by electronic devices. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by a processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of a power load management simulation method in the above embodiment.

[0180] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0181] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0182] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0183] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0184] 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 its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are all within the protection scope of the claims to be approved.

Claims

1. A power load management simulation system, characterized in that: include: Digital simulators, hardware, and simulation software running on said hardware under uniform specification standards; The hardware includes a computing unit under a unified specification standard, an actual physical device and a simulation interface, wherein the computing unit is connected to the actual physical device via the simulation interface; The simulation software is used to construct a digital model required for simulation based on a simulation request and provide a simulation environment for the digital simulator to perform simulation; The actual physical device is used to construct a physical simulation environment required for simulation based on the simulation request, and to control the operation of the actual physical device in the physical simulation environment based on the digital model; The computing unit is used to obtain the operating data of the actual physical device according to the digital model and perform data processing on the operating data; The digital simulator is used to perform power load management simulation on the processed operating data in the simulation environment in combination with the digital model to obtain a simulation result corresponding to the simulation request.

2. The system according to claim 1, characterized in that The simulation software includes a modeling environment, a digital model library and a simulation environment: The modeling environment is used to perform custom modeling and configuration-based modeling according to the simulation request to obtain a digital model required for simulation; The digital model library includes a pre-built original digital model, which is used to perform configuration modeling in the modeling environment to build a digital model required for simulation based on the simulation request and the original digital model; The simulation environment is used to provide an environment for the digital simulator to perform simulation based on the simulation request.

3. The system according to claim 1, characterized in that The power load simulation includes one or more of the following: load timing simulation, distributed power supply operation timing simulation, user energy usage scenario simulation, digital power grid simulation, load management strategy simulation, load trading service simulation, virtual power plant precise regulation simulation and load source grid load storage coordinated control simulation.

4. The system according to claim 1, characterized in that The digital model includes one or more of the following: a load characteristic model for simulating the user's load operation characteristics, a load adjustable potential model for regulating the user's power distribution, and a load control strategy model for regulating the equipment operation strategy.

5. The system according to claim 1, wherein: The actual physical device includes: interconnected customer power supply and utilization system simulation equipment, physical simulation environment comprehensive measurement and control cabinet and intelligent device test bench; The customer power supply and utilization system simulation device is used to construct a physical simulation environment required for simulation based on the simulation request; The smart device test bench is used to provide an interface to connect a specific smart device to the physical simulation environment based on the simulation request; The physical simulation environment integrated measurement and control cabinet is used to control the operation of the specific intelligent device and the customer power supply and utilization system simulation equipment in the physical simulation environment based on the digital model.

6. The system according to claim 1, wherein: The computing unit includes several core computing components; The core computing components realize real-time data transmission and real-time processing through high-speed communication; Each of the core computing components is communicatively connected with the actual physical device and the digital simulator via the simulation interface; The core computing component includes one of the following: a central processing unit, a digital signal processor and a field programmable gate array.

7. The system according to claim 1, characterized in that The simulation interface comprises: A physical signal interface, used for physical signal interaction between the digital model and the actual physical device, so as to realize control of the actual physical device by the digital model; A communication interface for realizing digital signal interaction between the digital simulators and data interaction between the computing unit and the actual physical device; A power interface, used to realize the interaction of physical signals between the actual physical devices; A unified interface standard is set for the physical signal interface, the communication interface and the power interface respectively.

8. The system of claim 1, wherein: The simulation software also includes a human-machine interface for users to edit parameters of the digital model, manage simulation case archives and files, provide real-time simulation process monitoring, and display the simulation results.

9. A power load management simulation method, characterized in that: include: Obtain a simulation request for power load management, and build simulation software and configure hardware in the simulation system based on a simulation scenario corresponding to the simulation request, requirements for simulation performance, and simulation capabilities of a digital simulator in the simulation system; Constructing an initial digital model required for simulation in the simulation software according to the simulation request, and verifying the initial simulation model to obtain a digital model that meets the simulation design requirements; Based on the simulation request, a simulation experiment is performed in the simulation system using the digital model to obtain an initial simulation result, and the initial simulation result is checked to obtain a simulation result that meets the expected deviation; The digital model, the simulation object in the simulation request, the process data of the simulation experiment and the simulation result are compiled into a simulation report.

10. The method according to claim 9, characterized in that The step of constructing simulation software and configuring hardware in the simulation system based on the simulation scenario corresponding to the simulation request, the requirements for simulation performance, and the simulation capability of the digital simulator in the simulation system includes: Determine the simulation scale, simulation step size and model refinement based on the simulation request and the simulation capability of the digital simulator in the simulation system; Constructing simulation software that supports the simulation scale, the simulation step size, and the model refinement; The hardware in the simulation system is configured based on the simulation scale, the simulation scenario corresponding to the simulation request, and the requirement for simulation performance.

11. The method according to claim 10, characterized in that The configuring of the hardware in the simulation system based on the simulation scale, the simulation scenario corresponding to the simulation request, and the requirement for simulation performance includes: Configure a computing unit based on the simulation scale and the requirements of the simulation scenario corresponding to the simulation request on the operation and simulation performance of the simulation system; Configuring an actual physical device based on a simulation scenario corresponding to the simulation request and requirements for simulation performance; configuring a simulation interface based on the requirements of the digital model and the input and output signals of the actual physical device; The computing unit and the actual physical device are connected via the simulation interface to form the hardware of the simulation system.

12. The method according to claim 11, characterized in that The configuring of the actual physical device based on the simulation scenario corresponding to the simulation request and the requirement for simulation performance includes: If the simulation request includes device debugging and performance testing, the actual physical device corresponding to the test should be configured; If an AC / DC control and protection system having a dominant influence on the power grid state quantity is configured in the simulation scenario, then according to the simulation request's requirements on simulation performance, an actual physical device corresponding to the AC / DC control and protection system is configured; In addition to the device debugging, performance testing and the AC / DC control and protection system, the actual physical device uses a digital model that is consistent with its own characteristics.

13. The method according to claim 9, characterized in that The step of verifying the initial simulation model to obtain a digital model that meets the simulation design requirements includes: Adjusting the operation mode of the simulation operation of the initial digital model to be consistent with the comparison object; Performing simulation under the operating mode to obtain a simulation curve of the initial digital model; The simulation curve of the initial digital model is compared with the theoretical curve of the comparison object to obtain a deviation value, and a digital model that meets the simulation design requirements is obtained according to the deviation value and the deviation threshold.

14. The method according to claim 9, characterized in that The checking of the initial simulation result to obtain a simulation result that meets the expected deviation includes: Determining a qualitative verification result of the simulation result based on a deviation between the simulation result and the result to be compared; Based on the simulation result and the result to be compared, a credibility quantification index of the simulation result is calculated by using a residual analysis or a characteristic quantity analysis method to obtain a quantitative verification result of the simulation result; Determine whether the simulation result exceeds the expected deviation according to the qualitative verification result or the quantitative verification result, and if so, re-perform the simulation test to obtain the simulation result until the simulation result meets the expected deviation; The result to be compared includes one of the following: actual power grid execution recording, field test recording, non-real-time simulation result and theoretical analysis result.

15. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, an electric power load management simulation method as claimed in any one of claims 9 to 14 is implemented.

16. A computing device readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, an electric power load management simulation method as described in any one of claims 9 to 14 is implemented.

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