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Real-time simulation test method of power system electromagnetic transient state based on cuda parallel computing

An electromagnetic transient simulation and electromagnetic transient technology, applied in concurrent instruction execution, machine execution devices, etc., can solve problems such as expensive prices, achieve the effects of model simplification, processing problem solving, and simulation speed improvement

Inactive Publication Date: 2017-05-03
SHENZHEN KANGBIDA CONTROL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its expensive price, users are discouraged from it

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  • Real-time simulation test method of power system electromagnetic transient state based on cuda parallel computing
  • Real-time simulation test method of power system electromagnetic transient state based on cuda parallel computing

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Embodiment 1

[0029] figure 1 As shown, CUDA decomposes calculations into thread kernels one by one: kernel_1, kernel_2...kernel_M, and each thread kernel is handed over to each grid Grid to complete, and the grid Grid divides the task into blocks one by one. Here, the blocks managed by each grid Grid are limited. The Block layer directly manages each thread Thread. When performing real-time simulation of the electromagnetic transient state of the power system, 2k calculations are allocated to different threads Thread. Go, because the number of CUDA calculation cores is very large, when 2k is less than this number, the calculation can be decomposed into more parallel calculations in each 2k calculation, by developing an algorithm suitable for the CUDA program execution model, and reasonably setting the Block And the number of Threads can make full use of the powerful parallel processing capability of GPU to solve the problem of processing electromagnetic transient massive data.

Embodiment 2

[0031] figure 2 As shown, the electromagnetic transient simulation of the power system must consider the electromagnetic transient process of the generator stator winding and the line, and all of them must be described by differential equations. These are linear ordinary differential equations, which can be written in the following form after simple transformation:

[0032] dX / dt=F(X)+G(U) (1)

[0033] X is the system state variable matrix

[0034] Using the two-point Euler method (the principle of other methods is the same), that is

[0035] x i n+1 =X i n-1 +(2h)(dX i n / dt) (2)

[0036] Substituting (1) into (2), we get

[0037] x i n+1 =X i n-1 +(2h)(F i (X n )+G i (U n )) (3)

[0038] In order to ensure the numerical stability of the calculation method, the prediction-correction method is used to solve equations (3) and obtain equation (4). Here, X ip n+1 predicted value, X icn+1 is the correction value

[0039] x ip n+1 =X i n-1 +2h(F i (X ...

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Abstract

The invention discloses a test method for achieving electromagnetic transient real-time simulation of an electrical power system based on CUDA parallel computing. An electromagnetic transient simulation test host computer adopts a CPU (central processing unit) and GPU (ground power unit) mode; the GPU uses a CUDA platform parallel computing framework; the simulation test host computer is connected with collection devices of all channels of signals through the gigabit Ethernet; a model can be greatly simplified mainly based on of the digital substation simulation instead of the whole-network or whole system simulation, the traditional simulation speed can be increased by dozens of times or hundreds of times, and requirements of transformer substation electromagnetic transient real-time simulation computing are met; and compared with the cost of a large parallel computer or a professional parallel computer, the cost of the CUDA parallel computing platform is greatly reduced. According to the method, in the aspect of electromagnetic transient real-time simulation of the electrical power system, the performance is greatly improved, the cost is substantially reduced, and the method has a wide popularization value.

Description

technical field [0001] The invention relates to the field of electric power control, in particular to a method for realizing real-time simulation and testing of electric power system electromagnetic transient state based on CUDA parallel computing. Background technique [0002] The electromagnetic transient process and electromechanical transient process of power system are two physical processes characterized by different mathematical models and with different time constants. In traditional power system analysis tools, these two processes are usually digitally simulated separately. Among them, compared with the electromechanical transient simulation, the nonlinearity of the electromagnetic transient model and the instantaneousness of parameter changes greatly increase the calculation amount and calculation time of the simulation, and it is much more difficult to realize the real-time digital simulation of a system of a certain scale. With the interconnection of regional po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/38
Inventor 刘劲丁建义鄢军华张孝山刘正方
Owner SHENZHEN KANGBIDA CONTROL TECH
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