Long-time scale continuous simulation system and method for power grid dispatching cyber-physical system

Abstract

The present invention discloses a long-time-scale continuous simulation system and method for a power grid dispatching information-physical system, and belongs to the technical field of power grid simulation. The system includes: a long-time-scale simulation control module for a power grid dispatching information-physical system, which is used to receive and process various data sources and promote the long-time-scale continuous simulation process; a power grid continuous operation mode correction module, which is used to correct the operating status of various equipment; a continuous steady-state flow and frequency simulation module, which is used to calculate the unbalanced amount of power generation and consumption, ACE calculation, frequency calculation, tie line calculation and steady-state flow calculation; a power grid dispatching information-physical system interaction module, which is used for data interaction and sends the data of the continuous steady-state flow and frequency simulation module to the long-time-scale simulation control module of the power grid dispatching information-physical system. The method realizes the deduction of the power grid control, analysis and decision-making process driven by the external environment and regulation behavior, which is more realistic and appropriate to the actual regulation and operation process.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power simulation, and in particular relates to a long-time-scale continuous simulation system and method for a power grid dispatching information-physical system. Background Art

[0002] While supporting the safe and stable operation of the physical power grid, the information system also introduces new uncertainties. The physical system and the information system influence each other. Faults occurring in a single system will be coupled and diffused in the information-physical system, seriously threatening the safety of the power system. Therefore, the theory of information-physical systems can be used to study the mutual influence between the primary and secondary systems of the power grid. The information-physical system of power grid dispatching mainly includes dispatching automation master station, substation, communication and physical power grid. Its operation process includes analysis processes such as power generation planning, load forecasting, and new energy forecasting, control processes such as master-substation AGC and AVC, and physical power grid simulation process. At present, there is no long-term continuous simulation method that considers the entire process of control operation in the information-physical system of power grid dispatching.

[0003] At present, the steady-state simulation of power systems mainly includes conventional power flow calculation and dynamic power flow calculation. Conventional power flow calculation generally assumes that the unbalanced power generation and consumption of the system is borne by a balancing machine in the network, which corresponds to the power plant bus that is responsible for adjusting the system frequency in reality. However, in the actual operation of the power system, there are always various forms of disturbances, and acceleration power appears. Under the action of this power, the speed of the generator rotor will change, causing the system frequency to fluctuate. When considering the quasi-steady-state process, in addition to the load balancing part of the power shortage according to its frequency characteristics, the power shortage of the system will be balanced by the speed regulation system of all generators in the network. This process is the result of the coordinated action of multiple generators in the network. In order to simulate this process, a dynamic power flow calculation method is proposed.

[0004] Both of the above simulation methods assume that a fixed grid operation mode is used, and after superimposing one or more grid disturbance events, the state changes of the power system flow are calculated. However, the actual operation process of the power system is a continuous change process driven by load, power generation changes and disturbance events. Therefore, a long-time scale continuous simulation method for the power grid is proposed. Long-time scale continuous simulation is different from long-term dynamic simulation of the power grid. The latter is based on a single grid operation section and focuses more on the dynamic response of the power system after large-scale disturbances, such as generator loss or system behavior after load mutation. Long-time scale continuous simulation focuses on the change process of the whole network operation state after the system is disturbed during the long-time scale load change process.

[0005] The paper "Research on AGC Closed-Loop Test Capability Based on Real-Time Simulation" built a closed-loop environment of RTDS real-time simulation and power grid dispatching operation simulation mirror system, carried out AGC test verification, and selected AGC events of the actual power grid for simulation inversion, including AGC control response events under power disturbances in field tests and AGC response events of power grid system frequency fluctuations. The simulation calculation in this paper is based on the real section near the actual AGC action time. It is a fixed power grid operation section with constant load and power generation, which is inconsistent with the changing power grid operation mode during the actual AGC operation process, resulting in differences between the frequency calculation and the actual frequency. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention proposes a long-time-scale continuous simulation system and method for a power grid dispatching information-physical system. The system can solve the problem that the simulation of power grid fault anomalies under a single operating section is inconsistent with the actual real-time changing power grid operating state, and realizes the deduction of power grid control, analysis, and decision-making processes driven by external environment and regulation behavior, which is more realistic and appropriate to the actual regulation and operation process.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] In a first aspect, the present invention provides a long-time-scale continuous simulation method for a power grid dispatching cyber-physical system, comprising:

[0009] The long-time simulation control module of the power grid dispatching cyber-physical system is used to receive and process various data sources and promote the long-time continuous simulation process;

[0010] The power grid continuous operation mode correction module is used to correct the operating status of various equipment in long-term continuous simulation;

[0011] The continuous steady-state power flow and frequency simulation module is used to calculate the unbalanced amount of power generation and consumption, ACE calculation, frequency calculation, tie line calculation and steady-state power flow after correcting the operating status of various equipment;

[0012] The grid dispatching information-physical system interaction module is used for data interaction between the physical grid simulation environment and the information system simulation environment, and sends the data of the continuous steady-state power flow and frequency simulation module to the long-time scale simulation control module of the grid dispatching information-physical system.

[0013] As a further improvement of the present invention, in the long-time scale simulation control module of the power grid dispatching information-physical system, the data sources in the long-time scale continuous simulation include: time-series power grid operation mode samples, dispatching master station instructions and external disturbance events;

[0014] The time-series grid operation mode samples include complete actual grid operation modes and power generation plans, tie line plans, maintenance plans, load forecasts, and new energy forecast data. The time-series grid operation mode samples are advanced according to sample time intervals;

[0015] The dispatching master station instructions include AGC unit control instructions and AVC bus voltage, transformer tap, and capacitive reactor switching control instructions. The dispatching master station instructions are issued according to the automatic control calculation cycle of the real-time control center of the dispatching master station, and sent to the plant station simulation server through the RTU data acquisition and forwarding tool. The plant station simulation server parses and simulates the control instructions according to the substation control logic;

[0016] The external disturbance events include primary system events such as tripping, load loss, and unit offline, and secondary system events such as data jump and network abnormality.

[0017] As a further improvement of the present invention, in the power grid continuous operation mode correction module, for the physical power grid, the timing power grid operation mode sample is a long-process time-varying base state operation mode, which is advanced according to the sample clock; the dispatching master station instructions and external disturbance events are both events in the timing advancement process, the dispatching master station instructions are issued by the dispatching automation master station, and the external disturbance events are set manually.

[0018] As a further improvement of the present invention, in the power grid continuous operation mode correction module, the power grid continuous operation mode correction formula is as follows:

[0019]

[0020] Where t is the simulation clock, represents the operation mode of the power grid at time t, represents the sample of the sequential grid operation mode at time t, represents the event at the i-th moment, It represents the superposition of all event running states from the start of simulation to time t. f () is the correction method for the power grid operation mode under the sample and event dual-drive mode.

[0021] As a further improvement of the present invention, the three types of data sources of the sequential power grid operation mode samples, the dispatching master station instructions, and the external disturbance events are sorted according to the priority of external disturbance events, the dispatching master station instructions, and the sequential power grid operation mode samples, which have the lowest priority, and are corrected. Then, the operation state correction model of the device m at time t is as follows:

[0022]

[0023] In the formula, is the operating status of device m at time t; Is the flag of whether the device m has an external disturbance event at time t, if yes, it is 1, if not, it is 0; is the operating state of the device m at time t due to the external disturbance event; Whether device m has a control instruction flag at time t, if yes, it is 1, if not, it is 0; is the control instruction operation status of device m at time t; is the sample operating status of device m at time t.

[0024] As a further improvement of the present invention, in the power grid continuous operation mode correction module, if there is no dispatching master station instruction or external disturbance event causing the telesignal to change in the long-time continuous simulation, the equipment operation status tracks the status in the time-series power grid operation mode sample in real time; if the operation status of a certain device changes due to the dispatching master station instruction or external disturbance event at a certain moment, the operation status of this device after this moment no longer tracks the time-series power grid operation mode sample, and the device maintains the status in the dispatching master station instruction or external disturbance event, where the external disturbance event has a higher priority than the dispatching master station instruction, until the dispatching master station instruction or external disturbance event is received again.

[0025] As a further improvement of the present invention, in the power grid continuous operation mode correction module, for the units participating in the AGC automatic control mode, the unit AGC control instructions adopt different calculation logics according to different control modes, and the automatic control modes include AUTO mode, SCHE mode and BASE mode;

[0026] In AUTO mode, the basic power of the unit is taken from the current actual strategy, and the adjustment power is calculated according to different adjustment power modes;

[0027] In SCHE mode, the basic power of the unit is determined by the power generation plan curve of the power plant or unit. The power generation plan module of the analysis and decision-making center in the power grid dispatching information physical system will make real-time, intra-day and day-ahead plans according to the power grid simulation operation status. The power generation plan will be issued in the form of control instructions through AGC.

[0028] In BASE mode, the basic power of the unit is the given value at that time, and the AGC sends this given value as a control instruction.

[0029] As a further improvement of the present invention, in the continuous steady-state power flow and frequency simulation module, the unbalanced power generation and consumption is first calculated, and then ACE calculation, frequency calculation, tie line calculation and steady-state power flow calculation are carried out based on the unbalanced power generation and consumption value;

[0030] The calculation of power generation and consumption imbalance includes: in long-time continuous simulation, the power generation and consumption imbalance at time t is the sum of the load power change and the power change caused by the event between two consecutive samples;

[0031] ACE calculation includes: In TBC mode, ACE is the imbalance of power generation and consumption in the control area;

[0032] Frequency calculation includes: the target value of frequency change at time t is obtained by dividing the unbalanced power generation and consumption by the frequency characteristic coefficient of the AC synchronous power grid where the simulation area is located;

[0033] Tie line calculation: Tie lines are boundary lines, topologically connected to boundary equivalent units or equivalent loads; after calculating the total value of the tie line corridor at time t, it is evenly distributed to the boundary equivalent units or equivalent loads according to the association between the tie line and the boundary equivalent units or equivalent loads;

[0034] Steady-state power flow calculation: Steady-state power flow calculation is performed based on the power grid operation status at time t.

[0035] As a further improvement of the present invention, the frequency calculation requires joint frequency simulation and calculation of the primary frequency modulation process and the secondary frequency modulation process, including:

[0036] 1) If the frequency change reaches the primary frequency regulation threshold of the unit and reaches the primary frequency regulation hysteresis time, the primary frequency regulation action of the unit is triggered;

[0037] 2) If the unit receives an AGC command and the primary frequency regulation direction is the same as the AGC command direction, the overall frequency response value of the unit is the sum of the primary frequency regulation actual value and the secondary frequency regulation target value;

[0038] 3) If the unit does not receive the AGC instruction at this time or receives the AGC instruction and the primary frequency modulation direction is opposite to the AGC instruction direction, the AGC instruction is blocked and the primary frequency modulation action is responded to first;

[0039] 4) Calculate the load frequency characteristic response;

[0040] 5) After correcting the imbalance between power generation and consumption, the actual frequency is obtained.

[0041] As a further improvement of the present invention, the power grid dispatching information-physical system interaction module is also used for physical-to-information interaction and information-to-physical interaction, and includes an information module and a physical module; the information module is the communication process of the dispatching automation master station and its master substation, and the physical module is the long-term continuous simulation process of the power grid operation mode.

[0042] As a further improvement of the present invention, the physical-to-information interaction includes that the physical-to-information interaction is realized through the RTU data collection and forwarding tool; the content of the physical-to-information interaction includes substation signals, network-wide currents, frequencies, and ACE data;

[0043] The information-to-physical interaction includes two categories. One is the master station control instructions, which interact through the RTU data acquisition and forwarding tool. The interaction content includes AGC unit control instructions and AVC bus voltage, transformer tap, and capacitor switching control instructions; the other is auxiliary decision-making instructions, which interact through the message bus in the simulation system. The interaction content is fault handling instructions.

[0044] In a second aspect, the present invention provides a long-time-scale continuous simulation system for a power grid dispatching cyber-physical system, comprising:

[0045] In the long-time continuous simulation process, the long-time simulation control module of the power grid dispatching information-physical system receives various events from different sources in real time: if there is a control instruction from the master station, the substation control process simulation will be entered; if the time interval of the sequential operation sample is reached, the sample inversion server will send the sample of the sequential power grid operation mode at this moment, which will be received by the power grid simulation server; if there is an external disturbance event, the event simulation server will be entered;

[0046] The power grid continuous operation mode correction module corrects the operation status of all devices at this moment according to the power grid continuous operation mode correction method;

[0047] Continuous steady-state power flow and frequency simulation module, specifically performs:

[0048] 1) Calculate the unbalanced power generation and consumption of the power grid and ACE at this moment;

[0049] 2) If the frequency calculation cycle is reached, the primary and secondary frequency regulation combined frequency calculation module is entered; after the frequency calculation is completed, the imbalance between power generation and consumption is corrected;

[0050] 2) If the power flow calculation period is reached, based on the unbalanced power generation and consumption, the tie line calculation and steady-state power flow calculation are carried out simultaneously;

[0051] The power grid dispatching information-physical system interaction module forwards the simulation results of the whole network flow, ACE, frequency and substation signals of the physical system simulation environment to the dispatching master station front-end system through the RTU data acquisition and forwarding tool; forwards the master station control instructions of the information system simulation environment to the plant station simulation through the RTU data acquisition and forwarding tool; and forwards the auxiliary decision-making instructions to the event simulation server through the message bus.

[0052] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the long-time-scale continuous simulation method for the power grid dispatching information-physical system when executing the computer program.

[0053] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the long-time-scale continuous simulation method of the power grid dispatching information-physical system is implemented.

[0054] In a fifth aspect, the present invention provides a computer program product, comprising computer instructions, wherein the computer instructions instruct a computer to execute the long-time-scale continuous simulation method for a power grid dispatching information-physical system.

[0055] The beneficial effects of the present invention compared with the prior art are as follows:

[0056] The long-time-scale continuous simulation system of the power grid proposed in the present invention, the long-time-scale simulation control module of the power grid dispatching information-physical system can receive and process various data sources and advance the simulation clock process, and the power grid continuous operation mode correction module can correct the operating status of various equipment during the long-time-scale continuous simulation process. The continuous steady-state power flow and frequency simulation module can perform tie line calculation, ACE calculation, frequency calculation and steady-state power flow calculation, and the power grid dispatching information-physical system interaction module forwards data; therefore, the present invention can solve the problem that the simulation of power grid fault anomalies under a single operating section is inconsistent with the actual real-time changing power grid operating state, and realizes the deduction of power grid control, analysis, and decision-making processes driven by external environment and regulation behavior, which is more realistic and appropriate to the actual regulation operation process. The proposed power grid dispatching information-physical simulation system can jointly simulate the power grid dispatching information flow and energy flow, and provide a digital test verification environment for the full business of power grid dispatching such as regulation software quality management, regulation operation simulation, artificial intelligence training, and new technology verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the embodiments of the present invention or the drawings of related technical solutions in the prior art are introduced below. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0058] Figure 1 The overall architecture diagram of the long-time-scale continuous simulation system of the power grid dispatching cyber-physical system is provided for the present invention;

[0059] Figure 2 A schematic diagram of the evolution process of the power grid operation state provided by an embodiment of the present invention;

[0060] Figure 3 A flow chart of a long-time-scale continuous simulation method for a power grid dispatching information-physical system is provided for the present invention. DETAILED DESCRIPTION

[0061] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. For the step numbers in the following embodiments, they are only provided for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0062] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0063] Explanation of abbreviations and key terms:

[0064] CPS: Cyber-physical system, whose full English name is Cyber-physical system, is a complex system that integrates computing, communication and control. It closely connects physical entities with virtual network space through embedded computers and network technology to achieve real-time perception, dynamic control and information services.

[0065] AGC: Automatic Generation Control, the full name in English is Automatic Generation Control, which maintains the system frequency and / or interconnection line exchange power within a certain target range by automatically adjusting the active output of the generator sets in the dispatching area.

[0066] ACE: Area Control Error, also known as Area Control Error, is an important parameter for power system frequency control and tie-line power control. It is used to indicate the deviation between actual power generation and planned power generation in a control area.

[0067] FFC: Flat Frequency Control, which maintains the system frequency constant, is generally used in independently operated power systems or the main system of interconnected power systems.

[0068] FTC: Flat Tie-line Control, which maintains the constant exchange power of the tie line and is generally used in small systems.

[0069] TBC: Tie-line Bias Frequency Control, which detects frequency and tie-line exchange power deviations simultaneously. ACE responds to load changes in the area and is the most commonly used control method in interconnected regional power grids.

[0070] AVC: Automatic var-voltage control, automatic var-voltage control, refers to the use of computer systems and communication networks to calculate control strategies online according to the real-time operating conditions of the power grid, and automatically close-loop control of reactive and voltage regulation equipment to achieve reasonable reactive voltage distribution.

[0071] RTU: Remote Terminal Unit, Remote Terminal Unit, is a specially designed computer measurement and control unit, mainly used for long-distance communication and harsh industrial field environments.

[0072] SCADA: Supervisory Control and Data Acquisition system, is a system widely used in industrial automation and process control.

[0073] Time-series grid operation mode sample: referred to as sample, contains complete actual grid operation mode and power generation plan, interconnection line plan, maintenance plan, load forecast, new energy forecast and other data. It is a set of multi-section continuous operation mode data over a long period of time.

[0074] While supporting the safe and stable operation of the physical power grid, the information system also introduces new uncertainties. The physical system and the information system influence each other. Faults in a single system will be coupled and diffused in the information-physical system, seriously threatening the safety of the power system. Therefore, the theory of information-physical systems can be used to study the mutual influence between the primary and secondary systems of the power grid. The information-physical system of power grid dispatching mainly includes dispatching automation master station, substation, communication and physical power grid. Its operation process includes analysis processes such as power generation planning, load forecasting, and new energy forecasting, control processes such as master and substation AGC and AVC, and long-term continuous simulation processes of the physical power grid.

[0075] like Figure 1 As shown, the first object of the present invention is to provide a long-time-scale continuous simulation system for a power grid dispatching information-physical system, comprising:

[0076] The long-time simulation control module of the power grid dispatching cyber-physical system is used to receive and process various data sources and promote the long-time continuous simulation process;

[0077] The power grid continuous operation mode correction module is used to correct the operating status of various equipment in long-term continuous simulation;

[0078] The continuous steady-state power flow and frequency simulation module is used to calculate the unbalanced amount of power generation and consumption, ACE calculation, frequency calculation, tie line calculation and steady-state power flow after correcting the operating status of various equipment;

[0079] The grid dispatching information-physical system interaction module is used for data interaction between the physical grid simulation environment and the information system simulation environment, and sends the data of the continuous steady-state power flow and frequency simulation module to the long-time scale simulation control module of the grid dispatching information-physical system.

[0080] The present invention aims to provide a long-time-scale continuous simulation system for power grid dispatching cyber-physical systems. The system integrates multiple modules and can realize continuous and accurate simulation of power grids over long time scales to support the formulation and optimization of power grid dispatching decisions.

[0081] Among them, the long-time scale simulation control module of the power grid dispatching information-physical system: This module is responsible for receiving information from different data sources (such as meteorological data, load forecasting, equipment status monitoring, etc.), and promoting the long-time scale continuous simulation process based on this information. By integrating and processing various data sources, this module can simulate the operation status of the power grid at different time scales, providing a basis for subsequent simulation analysis.

[0082] Among them, the grid continuous operation mode correction module: in the long-term continuous simulation process, according to the actual operation status and expected changes of the grid, the operation status of various equipment (such as generator output, load level, etc.) is corrected. By updating the equipment status in real time or regularly, this module can ensure that the simulation results are closer to the actual grid operation.

[0083] Among them, the continuous steady-state power flow and frequency simulation module: after correcting the equipment status, a series of calculations are performed, including power generation and consumption imbalance calculation, ACE calculation, frequency calculation, tie line calculation and steady-state power flow calculation. These calculations can evaluate the stability and security of the power grid over a long period of time and provide key information for dispatching decisions.

[0084] Among them, the grid dispatching information-physical system interaction module: realizes data interaction between the physical grid simulation environment and the information system simulation environment, and sends the data of the continuous steady-state power flow and frequency simulation module to the long-term simulation control module of the grid dispatching information-physical system. Through data interaction, this module can ensure that the simulation system can reflect the actual state of the grid in real time, and support the feedback and optimization of simulation results.

[0085] By integrating multi-source data and making real-time corrections, the present invention can more accurately simulate the operating state of the power grid on a long time scale. The calculation results provided by the continuous steady-state power flow and frequency simulation module can provide key information for power grid dispatching decisions and support the formulation of more scientific and reasonable dispatching strategies. Through the feedback of simulation results, the present invention can support the continuous optimization and improvement of the power grid system and improve the safety and economy of the power grid. The present invention can adapt to simulation requirements in different time scales and different scenarios, and provide flexible support for power grid dispatching.

[0086] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0087] The long-time-scale continuous simulation in the information-physical system of power grid dispatching proposed in the present invention covers time scales from seconds to minutes, hours to days, and belongs to the category of steady-state simulation of power systems. It involves the simulation of the operating status of the physical power grid, the control process of substations and the operating status of power plants, the interaction between dispatching masters and substations, and the entire regulation process of monitoring, control, analysis and decision-making by the dispatching master station.

[0088] In particular, due to the inconsistency between the abnormal simulation of power grid faults under a single operating section and the actual real-time changing power grid operation status, a method for calculating the unbalanced power generation and consumption in the process of continuous steady-state power flow calculation is proposed to realize the dual-driven simulation of load changes and events over a long time scale.

[0089] As physical power grid simulation cannot accurately simulate the power grid dispatching operation process, a long-time scale simulation control method of power grid dispatching information-physical system and an interaction method of power grid dispatching information-physical system are proposed to realize the joint simulation of power grid dispatching information flow and energy flow.

[0090] The two major features of the long-time scale simulation system of the information-physical system for power grid dispatching provided by the embodiment of the present invention are: first, the fusion of information-physical systems, which requires the addition of information system simulation and information-physical system interactive simulation on the basis of traditional physical power grid simulation; second, the long-time scale proposed in the present invention covers time scales from seconds to minutes, hours to days. In the long-time scale continuous simulation, it is necessary to change from the traditional single-operation section independent simulation mode to the multi-operation section continuous simulation mode, and superimpose simulation events in the process. Optionally, the information system in the embodiment of the present invention is described by taking the dispatching automation master station and substation system as an example.

[0091] Therefore, in view of the characteristics of long-time simulation of power grid dispatching cyber-physical system, the overall architecture of the continuous simulation method proposed in the present invention is as follows: Figure 1 As shown, specifically including:

[0092] First, the long-time scale simulation control module of the information-physical system of the power grid dispatching is mainly used to receive and process various data sources and promote the long-time scale continuous simulation process.

[0093] Among them, the long-time scale simulation control module of the power grid dispatching information-physical system and the long-time scale continuous simulation of the power grid dispatching information-physical system have three types of data sources: one is the time-series power grid operation mode samples, the second is the dispatching master station instructions, and the third is the external disturbance events.

[0094] In the above scheme, the time-series grid operation mode samples contain complete actual grid operation modes and data such as power generation plans, interconnection line plans, maintenance plans, load forecasts, and new energy forecasts. The time-series grid operation mode samples are advanced according to the sample time intervals. In long-term continuous simulation, the grid simulation mainly tracks the load change curve and topology change mode in the sample to simulate the changes in electricity demand during long-term scheduling operations.

[0095] In the above scheme, the dispatching master station instructions include AGC unit control instructions and AVC bus voltage, transformer tap, capacitor switching and other control instructions. The dispatching master station instructions are issued according to the automatic control calculation cycle of the real-time control center of the dispatching master station, and are sent to the plant simulation server through the RTU data collection and forwarding tool. The plant simulation server parses and simulates the control instructions according to the substation control logic.

[0096] In the above scheme, external disturbance events include primary system events such as tripping and load loss, unit offline, and secondary system events such as data jump and network abnormality. They can be set manually or come from the auxiliary decision-making module of the dispatching master station. The auxiliary decision-making module is used to simulate the dispatcher's fault handling instructions.

[0097] Second, the grid continuous operation mode correction module is mainly used to correct the operating status of various equipment in long-term continuous simulation.

[0098] Among them, the grid continuous operation mode correction module, for the physical grid, the sequential grid operation mode sample is a long-process time-varying base state operation mode, which is advanced according to the sample clock; the dispatching master station instructions and external disturbance events are events in the sequential advancement process, the dispatching master station instructions are issued by the dispatching automation master station, and the external disturbance events are set manually. Therefore, the change of the grid operation mode in the entire long-time scale continuous simulation process is a dual-driven mode of samples and events. The evolution process of the grid operation state is shown in the figure below: Figure 2 shown.

[0099] The correction formula for the continuous operation mode of the power grid is as follows.

[0100]

[0101] Where t is the simulation clock, represents the operation mode of the power grid at time t, represents the sample of the sequential grid operation mode at time t, represents the event at the i-th moment, It represents the superposition of all event operation states from the beginning of simulation to time t, and f() is the correction method of the power grid operation mode under the dual-driving mode of samples and events.

[0102] For the three types of data sources, namely, sequential power grid operation mode samples, dispatching master station instructions, and external disturbance events, they are sorted according to the priority of external disturbance events, followed by dispatching master station instructions, and sequential power grid operation mode samples, and the operating status correction model of a certain device at time t is obtained as follows.

[0103]

[0104] In the formula, is the operating status of device m at time t; Is the flag of whether the device m has an external disturbance event at time t, if yes, it is 1, if not, it is 0; is the operating state of the device m at time t due to the external disturbance event; Whether device m has a control instruction flag at time t, if yes, it is 1, if not, it is 0; is the control instruction operation status of device m at time t; is the sample operating status of device m at time t.

[0105] This model indicates that the initial state value of a certain device comes from the sample of the time-series power grid operation mode. If there is no telesignal change caused by the dispatching master station command or external disturbance event in the long-term continuous simulation, the device operation state will track the state in the time-series power grid operation mode sample in real time. If the operation state of a certain device changes due to the dispatching master station command or external disturbance event at a certain moment, the operation state of this device after this moment will no longer track the time-series power grid operation mode sample, and always maintain the state in the dispatching master station command or external disturbance event, where the external disturbance event has a higher priority than the dispatching master station command until the dispatching master station command or external disturbance event is received again.

[0106] In particular, for units participating in the AGC automatic control mode, the unit AGC control instructions use different calculation logics depending on their control modes. Common automatic control modes include AUTO mode, SCHE mode and BASE mode. In AUTO mode, the basic power of the unit takes the current actual power, and the adjustment power is calculated according to different adjustment power modes; in SCHE mode, the basic power of the unit is determined by the power generation plan curve of the power plant or unit, and the power generation plan module of the analysis and decision center in the power grid dispatching information physical system will perform real-time, intra-day, and day-ahead planning according to the power grid simulation operation status, and its power generation plan will be issued through AGC in the form of control instructions; in BASE mode, the basic power of the unit is the given value at that time, which is generally set manually, and AGC will always issue this value as a control instruction.

[0107] In particular, for the new energy units participating in AGC, the output of the new energy units in the sample represents the maximum output capacity of the new energy at this moment. In order to ensure the consumption rate of new energy, the new energy AGC generally uses the "current output + output increment" method to issue instructions under the unlimited power state, where the output increment is generally taken as a certain proportion of the startup capacity. In order to simulate the change process of new energy output in long-term continuous simulation, each time a sample of the sequential power grid operation mode is received, the maximum output of the new energy unit at that time is corrected to the output of the new energy unit in the sample of the sequential power grid operation mode.

[0108] Third, the continuous steady-state power flow and frequency simulation module is mainly used for tie line calculation, ACE calculation, frequency calculation and steady-state power flow calculation.

[0109] Among them, in the continuous steady-state power flow and frequency simulation module, during the actual operation of the power grid, load changes or abnormal power grid faults will cause the unbalanced power generation and consumption in the control area, resulting in frequency changes in the control area and changes in the power flow of the interconnection line between the control area, thereby causing changes in ACE. Therefore, during the actual operation of the power grid, the unbalanced power generation and consumption is the independent variable, the frequency and the interconnection line are the dependent variables, and ACE is the calculation amount based on the frequency and the interconnection line. However, in long-term continuous simulation, since the interconnection line is a boundary line and is topologically connected to the boundary equivalent units or equivalent loads, if the unbalanced power generation and consumption in the control area is to be linked with the interconnection line, ACE is equated with the unbalanced power generation and consumption in the control area, and the frequency and the interconnection line are dependent variables based on the unbalanced power generation and consumption.

[0110] Therefore, the continuous steady-state power flow and frequency simulation module first calculates the unbalanced power generation and consumption, and then performs ACE calculation, frequency calculation and tie line calculation based on this value. The details are as follows:

[0111] 3.1) Calculation of power generation and consumption imbalance:

[0112] In long-time continuous simulation, the power generation and consumption imbalance at time t should be the sum of the load power change and the power change caused by the event between two consecutive samples.

[0113] Since the operation section at each moment in the time-series grid operation mode sample is balanced between power generation and consumption, the load change at time t should be the load change between the current sample and the previous sample. This load change is pre-shared by all units in the sample, but the part shared by the AGC unit should be the power generation and consumption imbalance in the continuous simulation of the continuous long time scale, which is used to trigger the AGC action in the grid dispatching information physical system. The calculation formula is as follows.

[0114]

[0115] Where t is the simulation clock represents the initial power generation and consumption imbalance at time t, represents the total load value in the sample at time t, represents the previous sample clock before this simulation clock, It represents the total load value in the previous sample at time t. It represents the total output value added of non-AGC units in the sample at time t, It represents the total added value of non-AGC unit output in the previous sample at time t, Indicates from The active power change value caused by all disturbance events up to time t.

[0116]

[0117] In the formula, is the corrected actual power generation and consumption imbalance at time t, is the change in all units caused by primary or secondary frequency regulation at time t, It is the change of all loads due to frequency change at time t.

[0118] 3.2) ACE calculation:

[0119] The most commonly used control mode in interconnected regional power grids is the TBC mode, which simultaneously detects frequency and tie line exchange power deviations, and ACE reflects load changes in the region. Therefore, in the TBC mode, ACE is the imbalance between power generation and consumption in the control area.

[0120]

[0121] 3.3) Secondary frequency modulation joint frequency calculation:

[0122] The calculation formula for the steady-state frequency change of the power grid is as follows.

[0123]

[0124] In the formula, is the target value of frequency change at time t, is the frequency characteristic coefficient of the AC synchronous power grid where the simulation area is located (for example, if the simulation area is Liaoning Province, then Take the frequency characteristic coefficient of Northeast Power Grid).

[0125] In the power grid dispatching cyber-physical system, it is necessary to perform joint frequency simulation and calculation on the primary frequency regulation process and the secondary frequency regulation process. The calculation logic is as follows:

[0126] 1) If the frequency change reaches the primary frequency regulation threshold of the unit and reaches the primary frequency regulation lag time, the primary frequency regulation action of this unit is triggered.

[0127] The target value of a frequency modulation action is

[0128] in, is the target value of the primary frequency regulation action of unit i at time t, is the rated power of unit i, is the frequency characteristic coefficient of unit i.

[0129] The actual value of frequency modulation in this calculation cycle

[0130] in, is the actual value of the primary frequency regulation target of unit i at time t, Calculate the period for frequency simulation, is the primary frequency regulation stabilization time of unit i.

[0131] 2) If the unit receives an AGC command at this time and the primary frequency regulation direction is the same as the AGC command direction, the overall frequency response value of the unit is the sum of the primary frequency regulation actual value and the secondary frequency regulation target value.

[0132]

[0133] in, is the actual value of the primary and secondary frequency response of unit i at time t, is the actual value of the secondary frequency regulation response of unit i at time t, which is calculated by the AGC command and the unit climbing rate.

[0134] 3) If the unit does not receive the AGC command at this time or receives the AGC command and the primary frequency modulation direction is opposite to the AGC command direction, the AGC command will be blocked and the primary frequency modulation action will be responded to first.

[0135]

[0136] 4) Calculation of load frequency characteristic response

[0137]

[0138] in, is the frequency response change of load j at time t, is the actual load of load j before frequency response at time t, is the frequency response coefficient of load j.

[0139] 5) After correcting the imbalance between power generation and consumption, the actual frequency value is obtained

[0140]

[0141] 3.4) Tie line calculation:

[0142] In the simulation model, the interconnection lines in the simulation area are boundary lines, which are topologically connected to boundary equivalent units or equivalent loads.

[0143]

[0144] In the formula, is the total value of the contact line corridor at time t, is the frequency characteristic coefficient of the power grid in the simulation area. (For example, if the simulation area is Liaoning Province, then Take the frequency characteristic coefficient of Liaoning power grid), is the planned value of the contact line corridor at time t, which is obtained from the sample.

[0145] Calculate Finally, it is evenly distributed to the boundary equivalent units or equivalent loads according to the relationship between the tie line and the boundary equivalent units or equivalent loads.

[0146] 3.5) Steady-state power flow calculation: Based on the grid operation status at time t, steady-state power flow calculation is performed.

[0147] The power grid dispatching information-physical system interaction module is mainly used for data forwarding between the physical power grid simulation environment and the information system simulation environment.

[0148] Fourth, the information module in the grid dispatching information-physical system is the communication process between the dispatching automation master station and its master substations, and the physical module is the long-term continuous simulation process of the grid operation mode. The interaction of the grid dispatching information-physical system includes the interaction from physical to information and from information to physical.

[0149] As an example, the interaction from physical to information is realized through RTU data collection and forwarding tools. The content of physical to information interaction includes substation signals, network-wide current, frequency, ACE and other data.

[0150] Furthermore, the interaction from information to physics and from physics to information includes two categories. One is the master station control instructions, which interact through the RTU data acquisition and forwarding tool. The interaction content includes AGC unit control instructions and AVC bus voltage, transformer tap, capacitor switching and other control instructions; the other is auxiliary decision-making instructions, which interact through the message bus in the simulation system. The interaction content is fault handling instructions, etc.

[0151] based on Figure 3 The second object of the present invention is to provide a long-time-scale continuous simulation method for a power grid dispatching information-physical system. Based on the above-mentioned long-time-scale continuous simulation system for a power grid dispatching information-physical system, the main simulation process includes the following steps:

[0152] Step (1) first enters the power grid steady-state continuous simulation control module. In the long-term continuous simulation process, various events from different sources are received in real time: if there is a master station control instruction, the substation control process simulation is entered; if the timing operation sample time interval is reached, the sample inversion server sends the timing power grid operation mode sample at this moment, which is received by the power grid simulation server; if there is an external disturbance event, the event simulation server is entered.

[0153] Step (2) then enters the power grid continuous operation mode correction module, and corrects the operating status of all devices at this moment according to the power grid continuous operation mode correction method.

[0154] Step (3) Then enter the continuous steady-state power flow and frequency simulation module

[0155] 1) First, calculate the unbalanced power generation and consumption of the power grid at this moment and calculate ACE;

[0156] 2) If the frequency calculation cycle is reached, the primary and secondary frequency regulation combined frequency calculation module is entered; after the frequency calculation is completed, the imbalance between power generation and consumption is corrected;

[0157] 2) If the power flow calculation period is reached, based on the unbalanced power generation and consumption of the power grid, the tie line calculation and steady-state power flow calculation are carried out simultaneously

[0158] Step (4) finally enters the information-physical system interaction module of the power grid dispatching, and forwards the simulation results of the physical system simulation environment, such as the whole network flow, ACE, frequency and substation signal, to the dispatching master station front-end system through the RTU data acquisition and forwarding tool; forwards the master station control instructions of the information system simulation environment to the plant station simulation through the RTU data acquisition and forwarding tool; and forwards the auxiliary decision-making instructions to the event simulation server through the message bus.

[0159] If there is human operation, the human operation will be converted into external disturbance event processing through the message bus.

[0160] The long-term and long-scale continuous simulation method for power grids proposed in this invention can solve the problem that the simulation of power grid fault anomalies under a single operating section is inconsistent with the actual real-time changing power grid operating state, and realizes the deduction of power grid control, analysis, and decision-making processes driven by external environment and regulation behavior, which is more realistic and appropriate to the actual regulation operation process. The proposed power grid dispatching information-physical simulation system architecture and interaction method can jointly simulate the power grid dispatching information flow and energy flow, and provide a digital test verification environment for all power grid dispatching services such as regulation software quality management, regulation operation simulation, artificial intelligence training, and new technology verification.

[0161] The method for correcting the continuous power grid operation mode in the embodiment of the present invention, the existing simulation is based on a single operation section, and it is impossible to solve the problem of joint simulation of multiple data sources under multiple operation sections. The power generation and consumption imbalance calculation method and the primary and secondary frequency modulation combined frequency calculation method in the continuous steady-state power flow calculation process, the power generation and consumption imbalance in the existing simulation is caused by a certain fault abnormality, and the power generation and consumption imbalance in the continuous long-term simulation of multiple operation sections is generated by the superposition of load changes and event changes in the sample, and the power grid dispatching information physical system is a long-term continuous simulation process that comprehensively considers the primary and secondary frequency modulation process of the power grid. Therefore, the present invention proposes a method for calculating the power generation and consumption imbalance in the continuous steady-state power flow calculation process and the primary and secondary frequency modulation combined frequency calculation method. The architecture and interactive method of the power grid dispatching information physical simulation system: The existing simulation focuses on the physical power grid simulation, and fails to achieve a one-to-one simulation of the physical power grid, plant station, dispatching master station and communication process, and cannot combine the power grid dispatching information flow with the energy flow, and cannot support the experimental verification of all business operations of the power grid dispatching operation. Therefore, the present invention proposes a power grid dispatching information physical simulation system architecture and interactive method.

[0162] The third object of the embodiment of the present invention is to provide an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the long-time-scale continuous simulation method of the power grid dispatching information-physical system when executing the computer program. It also includes a communication interface and a bus.

[0163] The fourth objective of an embodiment of the present invention is to provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the long-time-scale continuous simulation method of the power grid dispatching information-physical system is implemented.

[0164] A fifth objective of an embodiment of the present invention is to provide a computer program product, wherein the computer program product comprises computer instructions, wherein the computer instructions instruct a computer to execute the long-time-scale continuous simulation method of the power grid dispatching information-physical system.

[0165] Therefore, the application prospects of the system of the present invention can be directed to dispatchers at all levels, industrial companies, government agencies, scientific research universities, market members, and enterprises outside the system, providing control digital service information-physical joint simulation environment, technical services and consulting, software quality management, technology and market rule verification, and forming an open and shared "digital production line, test field, and quality inspection station."

[0166] 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.

[0167] 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.

[0168] 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, readable storage media, optical storage, etc.) containing computer-usable program codes.

[0169] 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.

[0170] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A long-time-scale continuous simulation system for a power grid dispatching cyber-physical system, characterized in that: include: The long-time simulation control module of the power grid dispatching cyber-physical system is used to receive and process various data sources and promote the long-time continuous simulation process; The power grid continuous operation mode correction module is used to correct the operating status of various equipment in long-term continuous simulation; The continuous steady-state power flow and frequency simulation module is used to calculate the unbalanced amount of power generation and consumption, ACE calculation, frequency calculation, tie line calculation and steady-state power flow after correcting the operating status of various equipment; The power grid dispatching information-physical system interaction module is used for data interaction between the physical power grid simulation environment and the information system simulation environment, and sends the data of the continuous steady-state power flow and frequency simulation module to the power grid dispatching information-physical system long-time scale simulation control module; In the long-time scale simulation control module of the power grid dispatching information-physical system, the data sources in the long-time scale continuous simulation include: time-series power grid operation mode samples, dispatching master station instructions and external disturbance events; The time-series grid operation mode samples include complete actual grid operation modes and power generation plans, tie line plans, maintenance plans, load forecasts, and new energy forecast data. The time-series grid operation mode samples are advanced according to sample time intervals; The dispatching master station instructions include AGC unit control instructions and AVC bus voltage, transformer tap, and capacitive reactor switching control instructions. The dispatching master station instructions are issued according to the automatic control calculation cycle of the real-time control center of the dispatching master station, and sent to the plant station simulation server through the RTU data acquisition and forwarding tool. The plant station simulation server parses and simulates the control instructions according to the substation control logic; The external disturbance events include primary system events such as tripping, load loss, and unit offline, and secondary system events such as data jump and network abnormality; For the three types of data sources of the sequential power grid operation mode samples, the dispatching master station instructions, and the external disturbance events, they are sorted according to the priority of external disturbance events, the dispatching master station instructions, and the sequential power grid operation mode samples, which have the lowest priority, and are corrected. The operation state correction model of device m at time t is as follows: In the formula, is the operating status of device m at time t; Is the flag of whether the device m has an external disturbance event at time t, if yes, it is 1, if not, it is 0; is the operating state of the device m at time t due to the external disturbance event; Is the flag of whether device m has a control instruction at time t, if yes, it is 1, if not, it is 0; is the control instruction operation status of device m at time t; is the sample operating status of device m at time t.

2. The long-time-scale continuous simulation system for power grid dispatching information-physical system according to claim 1, characterized in that: In the power grid continuous operation mode correction module, for the physical power grid, the sequential power grid operation mode sample is a long-process time-varying base state operation mode, which is advanced according to the sample clock; the dispatching master station instructions and external disturbance events are both events in the sequential advancement process, the dispatching master station instructions are issued by the dispatching automation master station, and the external disturbance events are set manually.

3. The long-time-scale continuous simulation system for power grid dispatching information-physical system according to claim 1, characterized in that: In the power grid continuous operation mode correction module, the power grid continuous operation mode correction formula is as follows: Where t is the simulation clock, represents the operation mode of the power grid at time t, represents the sample of the sequential grid operation mode at time t, represents the event at the i-th moment, It represents the superposition of all event running states from the start of simulation to time t. f () is the correction method for the power grid operation mode under the sample and event dual-drive mode.

4. The long-time-scale continuous simulation system for power grid dispatching information-physical system according to claim 1, characterized in that: In the power grid continuous operation mode correction module, if there is no dispatching master station instruction or external disturbance event causing the telesignal to change in the long-time continuous simulation, the equipment operation status will track the status in the time-series power grid operation mode sample in real time; if the operation status of a certain device changes due to the dispatching master station instruction or external disturbance event at a certain moment, the operation status of the device after this moment will no longer track the time-series power grid operation mode sample, and the device will maintain the status in the dispatching master station instruction or external disturbance event, where the external disturbance event has a higher priority than the dispatching master station instruction until the dispatching master station instruction or external disturbance event is received again.

5. The long-time-scale continuous simulation system for power grid dispatching information-physical system according to claim 1, characterized in that: In the power grid continuous operation mode correction module, for the units participating in the AGC automatic control mode, the unit AGC control instructions adopt different calculation logics according to different control modes, and the automatic control modes include AUTO mode, SCHE mode and BASE mode; In AUTO mode, the basic power of the unit is the current actual power, and the adjustment power is calculated according to different adjustment power modes; In SCHE mode, the basic power of the unit is determined by the power generation plan curve of the power plant or unit. The power generation plan module of the analysis and decision-making center in the power grid dispatching information physical system will make real-time, intra-day and day-ahead plans according to the power grid simulation operation status. The power generation plan will be issued in the form of control instructions through AGC. In BASE mode, the basic power of the unit is the given value at that time, and the AGC sends this given value as a control instruction.

6. The long-time-scale continuous simulation system for power grid dispatching information-physical system according to claim 1, characterized in that: In the continuous steady-state power flow and frequency simulation module, the unbalanced power generation and consumption is first calculated, and then ACE calculation, frequency calculation, tie line calculation and steady-state power flow calculation are carried out based on the unbalanced power generation and consumption value; The calculation of power generation and consumption imbalance includes: in long-time continuous simulation, the power generation and consumption imbalance at time t is the sum of the load power change and the power change caused by the event between two consecutive samples; ACE calculation includes: In TBC mode, ACE is the imbalance of power generation and consumption in the control area; Frequency calculation includes: the target value of frequency change at time t is obtained by dividing the unbalanced power generation and consumption by the frequency characteristic coefficient of the AC synchronous power grid where the simulation area is located; Tie line calculation: Tie lines are boundary lines, topologically connected to boundary equivalent units or equivalent loads; after calculating the total value of the tie line corridor at time t, it is evenly distributed to the boundary equivalent units or equivalent loads according to the association between the tie line and the boundary equivalent units or equivalent loads; Steady-state power flow calculation: Steady-state power flow calculation is performed based on the power grid operation status at time t.

7. The long-time-scale continuous simulation system for power grid dispatching cyber-physical system according to claim 6, characterized in that: The frequency calculation requires joint frequency simulation and calculation of the primary frequency modulation process and the secondary frequency modulation process, including: 1) If the frequency change reaches the primary frequency regulation threshold of the unit and reaches the primary frequency regulation hysteresis time, the primary frequency regulation action of the unit is triggered; 2) If the unit receives an AGC command and the primary frequency regulation direction is the same as the AGC command direction, the overall frequency response value of the unit is the sum of the primary frequency regulation actual value and the secondary frequency regulation target value; 3) If the unit does not receive the AGC instruction at this time or receives the AGC instruction and the primary frequency modulation direction is opposite to the AGC instruction direction, the AGC instruction is blocked and the primary frequency modulation action is responded to first; 4) Calculate the load frequency characteristic response; 5) After correcting the imbalance between power generation and consumption, the actual frequency is obtained.

8. The long-time-scale continuous simulation system for power grid dispatching cyber-physical system according to claim 1, characterized in that: The power grid dispatching information-physical system interaction module is also used for physical-to-information interaction and information-to-physical interaction, and includes an information module and a physical module; the information module is the communication process of the dispatching automation master station and its master substation, and the physical module is the long-term continuous simulation process of the power grid operation mode.

9. The long-time-scale continuous simulation system for power grid dispatching cyber-physical system according to claim 8, characterized in that: The physical-to-information interaction includes that the physical-to-information interaction is realized through the RTU data collection and forwarding tool; the content of the physical-to-information interaction includes substation signals, network-wide currents, frequencies, and ACE data; The information-to-physical interaction includes two categories. One is the master station control instructions, which interact through the RTU data acquisition and forwarding tool. The interaction content includes AGC unit control instructions and AVC bus voltage, transformer tap, and capacitor switching control instructions; the other is auxiliary decision-making instructions, which interact through the message bus in the simulation system. The interaction content is fault handling instructions.

10. A long-time-scale continuous simulation method for a power grid dispatching information-physical system, based on the long-time-scale continuous simulation system for a power grid dispatching information-physical system according to any one of claims 1 to 9, characterized in that: include: In the long-time continuous simulation process, the long-time simulation control module of the power grid dispatching information-physical system receives various events from different sources in real time: if there is a control instruction from the master station, the substation control process simulation will be entered; if the time interval of the sequential operation sample is reached, the sample inversion server will send the sample of the sequential power grid operation mode at this moment, which will be received by the power grid simulation server; if there is an external disturbance event, the event simulation server will be entered; The power grid continuous operation mode correction module corrects the operation status of all devices at this moment according to the power grid continuous operation mode correction method; Continuous steady-state power flow and frequency simulation module, specifically performs: 1) Calculate the unbalanced power generation and consumption of the power grid and ACE at this moment; 2) If the frequency calculation cycle is reached, the primary and secondary frequency regulation combined frequency calculation module is entered; after the frequency calculation is completed, the imbalance between power generation and consumption is corrected; 2) If the power flow calculation period is reached, based on the unbalanced power generation and consumption, the tie line calculation and steady-state power flow calculation are carried out simultaneously; The power grid dispatch information-physical system interaction module forwards the simulation results of the whole network power flow, ACE, frequency and substation signal of the physical system simulation environment to the dispatch master station front-end system through the RTU data acquisition and forwarding tool; forwards the master station control instructions of the information system simulation environment to the plant station simulation through the RTU data acquisition and forwarding tool; The auxiliary decision-making instructions are forwarded to the event simulation server through the message bus.

11. An electronic device, characterized in that: It includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the long-time-scale continuous simulation method for the power grid dispatching information-physical system as described in claim 10.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the long-time-scale continuous simulation method of the power grid dispatching information-physical system described in claim 10.

13. A computer program product, comprising computer instructions, characterized in that: The computer instructions instruct the computer to execute the long-time-scale continuous simulation method for the power grid dispatching information-physical system described in claim 10.

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