Power grid operation planning system and method based on digital simulation

Abstract

The invention relates to a power grid operation planning system and method based on digital simulation, and relates to the technical field of power grid planning and operation simulation. The system comprises a data acquisition module, a data processing module and an operation display module, the data acquisition module is used for acquiring original data, and the original data is associated with power grid planning; the data processing module is used for processing the original data to obtain a power grid operation planning result; and the operation display module is used for generating visual data based on the power grid operation planning result, and the visual data is used for operation display. In the prediction and simulation process of the power grid operation planning, original data is processed through the data acquisition module and the data processing module to obtain a result associated with the power grid operation planning, and then visual display is performed through the operation display module, so that comprehensive and efficient management and prediction of the power grid planning state are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid planning and operation simulation, and in particular to a power grid operation planning system and method based on digital simulation. Background Art

[0002] In the context of social development, the construction of new power systems has accelerated, and the large-scale access of distributed photovoltaics and microgrid clusters has brought huge challenges to the safe operation and detailed planning of the power grid.

[0003] Among the related technologies, operation and maintenance personnel usually rely on experience to carry out the operation and forecast construction of power grid planning.

[0004] However, in the relevant technologies, it is inefficient to optimize and adjust the grid operation strategy based on the experience of operation and maintenance personnel. At the same time, digital simulation technology lacks accurate description of the grid system, and operation and maintenance personnel cannot fully and intuitively grasp the real-time operation status of the grid, making it difficult to effectively improve the operation and maintenance efficiency. Summary of the invention

[0005] The present invention is about a power grid operation planning system and method based on digital simulation, which can comprehensively and efficiently manage and predict the power grid planning status. The technical solution is as follows:

[0006] On the one hand, a power grid operation planning system based on digital simulation is provided, which includes a data acquisition module, a data processing module and an operation display module;

[0007] The output end of the data acquisition module is connected to the input end of the data processing module, and the output end of the data processing module is connected to the output end of the operation display module;

[0008] The data acquisition module is used to collect raw data, and the raw data is associated with power grid planning;

[0009] The data processing module is used to process the raw data to obtain a power grid operation planning result;

[0010] The operation display module is used to generate visualization data based on the power grid operation planning result, and the visualization data is used for operation display.

[0011] In an optional embodiment, the data acquisition module is used to collect operating data of the bus, generator, load, transformer, shunt capacitor reactor, AC line, DC line, series capacitor reactor, switch and knife switch as the original data.

[0012] In an optional embodiment, the data acquisition module is connected to a device management database;

[0013] The equipment management database includes main equipment data, and the main equipment data includes at least one of equipment type data, equipment number data, equipment coordinate data and equipment operation data.

[0014] In an optional embodiment, the data processing module includes a network architecture topology module, a circuit model module, a load prediction module, and an operation stability calculation module;

[0015] The network architecture module is communicatively connected with the circuit model module, and the circuit model module is communicatively connected with the load prediction module and the operation stability calculation module respectively;

[0016] The network architecture topology module is used to simulate the power grid architecture;

[0017] The circuit model module is used to correspond to the power grid architecture configuration data;

[0018] The load forecasting module is used to generate load forecasting data;

[0019] The operation stability calculation module is used to predict power flow data.

[0020] In an optional embodiment, the data processing module is also used to generate the power grid operation planning result based on the load forecast data and the power flow data.

[0021] In an optional embodiment, the operation display module includes a format conversion module and a data display module;

[0022] The format conversion module is communicatively connected with the data display module;

[0023] The format conversion module is used to convert the format of the power grid operation planning result so as to input it into the data display module for display.

[0024] In an optional embodiment, the digital simulation-based power grid operation planning system is connected to the distribution automation system via a Kafka bus.

[0025] On the other hand, a method for power grid operation planning based on digital simulation is provided, wherein the method is applied to the power grid operation planning system based on digital simulation as claimed in any one of claims 1 to 7, and the method comprises:

[0026] Collect raw data through the data acquisition module;

[0027] Generate a power grid operation planning result based on the original data by the data processing module;

[0028] The operation display module generates visualization data based on the power grid operation planning result, and performs operation display on the visualization data.

[0029] In an optional embodiment, collecting raw data through a data collection module includes:

[0030] The data acquisition module collects the working data of the bus, generator, load, transformer, shunt capacitor reactor, AC line, DC line, series capacitor reactor, switch and knife switch, and combines the main equipment data as the original data. The main equipment data includes at least one of equipment type data, equipment number data, equipment coordinate data and equipment operation data.

[0031] The beneficial effects brought about by the technical solution provided by the present invention include at least:

[0032] In the process of prediction and simulation of power grid operation planning, the original data is processed through the data acquisition module and the data processing module to obtain the results related to the power grid operation planning, and then visualized through the operation display module, thus realizing comprehensive and efficient management and prediction of the power grid planning status. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic structural diagram of a power grid operation planning system based on digital simulation provided by an exemplary embodiment of the present invention is shown.

[0035] Figure 2 A structural schematic diagram of another power grid operation planning system based on digital simulation provided by an exemplary embodiment of the present invention is shown.

[0036] Figure 3 A schematic flow chart of a method for power grid operation planning based on digital simulation provided by an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] Figure 1A schematic diagram of the structure of a power grid operation planning system based on digital simulation provided by an exemplary embodiment of the present invention is shown. The system includes a data acquisition module 110, a data processing module 120 and an operation display module 130; the output end of the data acquisition module is connected to the input end of the data processing module, and the output end of the data processing module is connected to the output end of the operation display module; the data acquisition module is used to collect raw data, and the raw data is associated with the power grid planning; the data processing module is used to process the raw data to obtain the power grid operation planning result; the operation display module is used to generate visual data based on the power grid operation planning result, and the visual data is used for operation display.

[0039] Figure 2 FIG. 1 is a schematic diagram showing a structure of another power grid operation planning system based on digital simulation provided by an exemplary embodiment of the present invention. Figure 2 Further explanation of the power grid operation planning system is given.

[0040] In the embodiment of the present invention, the data acquisition module is used to collect the working data of the bus, generator, load, transformer, shunt capacitor reactor, AC line, DC line, series capacitor reactor, switch and knife switch as the original data. Figure 2 As shown, the data acquisition module 110 is also connected to the equipment management database 140, which includes main equipment data, including at least one of equipment type data, equipment number data, equipment coordinate data, and equipment operation data. In one example, the equipment coordinate data can be implemented as the GIS coordinates of the equipment.

[0041] Optionally, in an embodiment of the present invention, if Figure 2 As shown, the digital simulation power grid operation planning system is connected to the distribution automation system 160 via the Kafka bus 150. The distribution automation system includes the power D5000 system. The data form of the original data includes voltage, current, active power, reactive power and various equipment status data.

[0042] Please refer to Figure 2 In the embodiment of the present invention, the data processing module 120 includes a network architecture topology module 121, a circuit model module 122, a load prediction module 123 and an operation stability calculation module 124; the network architecture module 121 is connected in communication with the circuit model module 122, and the circuit model module 122 is connected in communication with the load prediction module 123 and the operation stability calculation module 124 respectively;

[0043] In an embodiment of the present invention, the network architecture topology module is used to simulate the power grid architecture; the circuit model module is used to correspond to the power grid architecture configuration data; the load prediction module is used to generate load prediction data; and the operation stability calculation module is used to predict the power flow data.

[0044] Exemplarily, the function of the grid topology module is to construct data objects of each point device corresponding to the device type according to the modeling parameters if one of the device types corresponds to a point device. If one of the device types corresponds to a line device, then the data objects of each line device corresponding to the device type are constructed according to the modeling parameters. According to the existence of a topological connection relationship between two device types in the device type, the topology data is constructed according to the location data of each device corresponding to the two device types.

[0045] The function of the circuit model module is to further add electrical property data according to the grid topology data to form a circuit model, including data such as power supply, PV, PQ nodes, etc., to facilitate subsequent electrical calculations.

[0046] In this case, the load forecasting module and the operation stability calculation module are two functional output modules of the system. Among them, the load forecasting module is mainly used for regional load forecasting. It can collect historical regional load data to train the load forecasting model. The model can select deep learning algorithms such as LSTM to forecast the future load of the region. Through future load changes, the grid structure can be optimized and adjusted.

[0047] Correspondingly, the operation stability calculation module uses conventional methods such as the Newton-Raphson method and the Gauss-Seidel method. It can be divided into: 1) Real-time operation flow calculation, which calculates the real-time flow based on the real-time collected power grid equipment operation data; 2) After the grid simulation optimization, the node data is simulated and set to perform power grid flow calculation to deduce whether the optimized power grid operation is stable.

[0048] The main steps of power grid flow calculation are as follows:

[0049] (1) Establish a power system model and collect grid data, including parameters of generators, transformers, transmission lines, loads and other equipment; construct the topology of the grid and clarify the connection relationship between nodes and branches. Nodes are divided into slack nodes (SlackBus): designate a node as a slack node, whose voltage amplitude and phase angle are known. PQ node (Load Bus): load node, known active power and reactive power demand. PV node (Generator Bus): generator node, known active power and voltage amplitude.

[0050] (2) Determine the initial conditions and set reference values ​​(such as reference voltage and reference power) to simplify the calculation; give the initial conditions such as the output power of the generator and the power consumption of the load. The voltage amplitude of the balancing node is set to 1.0 pu and the phase angle is set to 0 rad. The voltage amplitude and phase angle of the PQ node and PV node can be set to the initial values, usually 1.0 pu and 0 rad.

[0051] (3) Construct an equivalent circuit and convert the actual power grid into an equivalent circuit model, which includes equivalent impedance, admittance, etc.; merge the ground branches and simplify the equivalent circuit.

[0052] (4) Select the calculation method. The available power flow calculation methods include Newton-Raphson method,

[0053] Construct the node admittance matrix (Y), where (Y ij ) represents the admittance between node (i) and node (j).

[0054] Construct the Jacobian matrix, which is a 2(n-1) x 2(n-1) matrix, where (n) is the number of nodes. The Jacobian matrix is ​​divided into four sub-matrices:

[0055]

[0056] in:

[0057] (J 11 ) is the partial derivative matrix of ΔP with respect to Δθ, (J 12 ) is the partial derivative matrix of ΔP with respect to ΔV, (J 21 ) is the partial derivative matrix of ΔQ with respect to Δθ, (J 22 ) is the partial derivative matrix of ΔQ with respect to ΔV.

[0058] (5) Iterative solution: Solve the node voltage equations through an iterative process, and update the node voltage each time until the convergence criterion is met. Calculate the active power error (ΔP) and reactive power error (ΔQ) of each node.

[0059] ΔP i =P ical -P ispec

[0060] ΔQ i =Q ical -Q ispec

[0061] Among them, (P ical ) and (Q ical ) is the active and reactive power calculated based on the current voltage and phase angle, (P ispec ) and (Q ispec ) are the specified active and reactive powers.

[0062] (6) Calculate branch power and loss. Based on the obtained node voltage, calculate the complex power flow of each branch; calculate the power loss in the power grid.

[0063] Optionally, after obtaining the predicted data and power flow data, the data processing module can generate the power grid operation planning results.

[0064] In the embodiment of the present invention, please refer to Figure 2 The operation display module 130 includes a format conversion module 131 and a data display module 132; the format conversion module 131 is in communication with the data display module 132. The format conversion module is used to convert the format of the power grid operation planning result to input the data display module for display. In one example, the data display module is connected to a display screen of a computer device.

[0065] Figure 3 A schematic diagram of a process flow of a power grid operation planning method based on digital simulation provided by an exemplary embodiment of the present invention is shown, and the method is applied to Figure 1 or Figure 2 Taking the power grid operation system based on digital simulation as an example, the method includes:

[0066] Step 301, collecting raw data through a data collection module.

[0067] That is, in the embodiment of the present invention, the working data of the bus, generator, load, transformer, shunt capacitor reactor, AC line, DC line, series capacitor reactor, switch and knife switch are collected as original data through the data acquisition module, and the main equipment data of the equipment management database connected to itself is collected.

[0068] Step 302: Generate a power grid operation planning result based on the original data through a data processing module.

[0069] That is, in the embodiment of the present invention, the network architecture module, the circuit model module, the compliance prediction module and the stability calculation module are combined with the original data to generate the power grid operation planning result.

[0070] Step 303: Generate visual data based on the power grid operation planning result through the operation display module, and perform operation display on the visual data.

[0071] To sum up, the method provided in the embodiment of the present invention, during the process of prediction and simulation of power grid operation planning, processes the original data through the data acquisition module and the data processing module to obtain the results related to the power grid operation planning, and then visualizes them through the operation display module, thereby realizing comprehensive and efficient management and prediction of the power grid planning status.

[0072] The methods and systems provided by various embodiments of the present invention use a power grid graphical topology structure to build a model, thereby greatly reducing the time spent on data processing and improving the accuracy of digital power grid modeling results.

[0073] The methods and systems provided by various embodiments of the present invention can reduce the user's detection work on digital power grid services by running the display module, thereby greatly improving the energy efficiency of power grid management.

[0074] The methods and systems provided in various embodiments of the present invention can perform simulation calculations and deductions based on real-time data collected from the power grid, thereby improving the planning and early warning capabilities of the power grid.

[0075] The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power grid operation planning system based on digital simulation, characterized in that: The system includes a data acquisition module, a data processing module and an operation display module; The output end of the data acquisition module is connected to the input end of the data processing module, and the output end of the data processing module is connected to the output end of the operation display module; The data acquisition module is used to collect raw data, and the raw data is associated with power grid planning; The data processing module is used to process the raw data to obtain a power grid operation planning result; The operation display module is used to generate visualization data based on the power grid operation planning result, and the visualization data is used for operation display.

2. The power grid operation planning system based on digital simulation according to claim 1, characterized in that: The data acquisition module is used to collect the working data of the bus, generator, load, transformer, shunt capacitor reactor, AC line, DC line, series capacitor reactor, switch and knife switch as the original data.

3. The power grid operation planning system based on digital simulation according to claim 2, characterized in that: The data acquisition module is connected to a device management database; The equipment management database includes main equipment data, and the main equipment data includes at least one of equipment type data, equipment number data, equipment coordinate data and equipment operation data.

4. The power grid operation planning system based on digital simulation according to claim 1, characterized in that: The data processing module includes a network architecture topology module, a circuit model module, a load prediction module and an operation stability calculation module; The network architecture module is communicatively connected with the circuit model module, and the circuit model module is communicatively connected with the load prediction module and the operation stability calculation module respectively; The network architecture topology module is used to simulate the power grid architecture; The circuit model module is used to correspond to the power grid architecture configuration data; The load forecasting module is used to generate load forecasting data; The operation stability calculation module is used to predict power flow data.

5. The power grid operation planning system based on digital simulation according to claim 4, characterized in that: The data processing module is also used to generate the power grid operation planning result based on the load forecast data and the power flow data.

6. The power grid operation planning system based on digital simulation according to claim 1, characterized in that: The operation display module includes a format conversion module and a data display module; The format conversion module is communicatively connected with the data display module; The format conversion module is used to convert the format of the power grid operation planning result so as to input it into the data display module for display.

7. The power grid operation planning system based on digital simulation according to claim 1, characterized in that: The digital simulation-based power grid operation planning system is connected to the distribution automation system via the Kafka bus.

8. A method for power grid operation planning based on digital simulation, characterized in that: The method is applied to the power grid operation planning system based on digital simulation as claimed in any one of claims 1 to 7, and the method comprises: Collect raw data through the data acquisition module; Through the network architecture module, circuit model module, compliance prediction module and stability calculation module, the original data is combined to generate the power grid operation planning results; The operation display module generates visualization data based on the power grid operation planning result, and performs operation display on the visualization data.

9. The method for power grid operation planning based on digital simulation according to claim 8, characterized in that: The collecting of raw data by the data collection module includes: The data acquisition module collects the working data of the bus, generator, load, transformer, shunt capacitor reactor, AC line, DC line, series capacitor reactor, switch and knife switch, and combines the main equipment data as the original data. The main equipment data includes at least one of equipment type data, equipment number data, equipment coordinate data and equipment operation data.

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