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Electro-magnetic transient small-step simulation method and system

A simulation system, electromagnetic transient technology, applied in general control systems, control/regulation systems, instruments, etc., can solve the problems that general processor systems cannot meet real-time simulation requirements, high cost, and limited simulation scale, and can meet the needs of The effect of real-time requirements, low cost, and large simulation scale

Inactive Publication Date: 2018-10-09
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above simulation systems have their own shortcomings, such as high cost and limited simulation scale.
[0006] Due to various difficulties in real-time simulation of electromagnetic transients, traditional general-purpose processor systems cannot meet the needs of real-time simulation in the context of the expansion of power grid simulation scale and higher real-time requirements.

Method used

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Embodiment 1

[0037] The solution adopted by the present invention to solve the technical problem is: an electromagnetic transient simulation method based on an FPGA platform with a small step size, and hardware acceleration is performed for the electromagnetic transient simulation that the simulation software cannot meet the real-time requirement. The step size of the electromagnetic transient simulation is on the order of microseconds, and the simulation software cannot meet the real-time requirement, so it is completed on the small step size system of the present invention. The topology of the power grid, component parameter information, conductance matrix and its inverse matrix, and constant parameters required for simulation are formed from the large-step system, and the small-step system is initialized through data interaction. Afterwards, the small step size system independently performs parallel simulation iterative operations on each component, and solves the node current vector and...

Embodiment 2

[0057] Based on the same inventive concept, the present invention also provides an electromagnetic transient small-step simulation system based on FPGA platform, the system structure is as follows figure 2 As shown, it mainly includes the following modules: component area, core computing area, common storage module, size step interface module and top-level control module. Among them, the component area includes the calculation module, control module and node current accumulation module; the core calculation area is responsible for matrix operation; the public storage module is responsible for the storage of simulation data; the large and small step interface module is responsible for the large step simulation system and the electromagnetic transient small step The data interaction of the simulation system; the top-level control module is responsible for the overall timing logic and the generation of excitation signals. The large-step-size simulation system on the external ser...

Embodiment 3

[0060] Take a complete simulation process as an implementation example of this system. May wish to set the large step size to 50us, the small step size to 2us, the overall timing is as follows image 3 shown.

[0061] Step 1: Receive initialization data from the large-step simulation system, and the electromagnetic transient small-step simulation system of the FPGA platform writes and initializes the interactive data. The initialization data includes: network conductance matrix and its inverse matrix, component configuration information, constants and component variables required for electromagnetic transient small-step simulation.

[0062] Step 2, set the total simulation time t=0, and start the simulation.

[0063] Step 3, through the conductance inverse matrix G 2 -1 and nodal current vector I his The matrix multiplication of solves the nodal voltage vector V s . This operation is done by the core computing area.

[0064] Step 4, judging whether to select a new cond...

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Abstract

The invention relates to an electro-magnetic transient small-step simulation method and system, which performs sub-grid parallel simulation calculation on a power grid by cooperating with a large-stepsystem of an external server, wherein the large-step system completes sub-grid decoupling of the power grid, and the small-step simulation system completes electro-magnetic transient simulation calculation and returns a simulation result back to the large-step system through data interaction, thereby achieving a purpose of performing real-time simulation on the whole power grid and grasping the dynamic operating process of the power grid. According to the invention, an FPGA (Field Programmable Gate Array) is taken as a simulation platform, and the characteristics of low cost, high parallelization of calculation units and ability of being suitable for highly streamlined production of the FPGA are utilized, parallel simulation calculation is simultaneously performed on different grid components, the whole system is highly streamlined, and the working frequency and throughput of the system are guaranteed under the condition of ensuring the simulation accuracy.

Description

technical field [0001] The invention relates to a method and system for performing electromagnetic transient small-step simulation in power grid simulation, in particular to an electromagnetic transient small-step simulation method and system. Background technique [0002] Power grid simulation is divided into offline simulation and real-time simulation. The electromagnetic transient simulation program (Electro-MagneticTransient Program, EMTP) has been widely used in the offline simulation of the power grid, and the offline simulation software is generally installed on a server or workstation with strong computing power, and its simulation step size is on the order of 100us. The real-time simulation can grasp the actual working state of the power grid more quickly and accurately, which is of great significance to the safety assessment and troubleshooting of the power grid. [0003] At the same time, power grid simulation can also be divided into electromechanical transient ...

Claims

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Application Information

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IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 穆清张星王祥旭彭红英刘子新王峰陈绪江徐树文林因吴丹岳黄道姗黄霆刘智煖苏清梅
Owner CHINA ELECTRIC POWER RES INST
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