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A gpu thread design method for power flow Jacobian matrix calculation

A technology of power flow and design method, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., and can solve problems such as inability to program to give full play to the advantages of GPU, optimize thread design, etc.

Inactive Publication Date: 2017-11-14
STATE GRID CORP OF CHINA +3
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Problems solved by technology

Therefore, the calculation of the Jacobian matrix can be quickly completed through reasonable scheduling between the CPU and the GPU. Scholars at home and abroad have begun to study the method of accelerating the Jacobian of the GPU, but there is no in-depth optimization of the thread design. The design of computing threads has been studied on the Internet, and the thread computing method and data indexing method have not been studied in depth, so that the program cannot make full use of the advantages of the GPU.

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  • A gpu thread design method for power flow Jacobian matrix calculation
  • A gpu thread design method for power flow Jacobian matrix calculation
  • A gpu thread design method for power flow Jacobian matrix calculation

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Embodiment Construction

[0066] Such as figure 1 As shown, the present invention proposes a GPU thread design method based on a GPU-based power flow Jacobian matrix calculation using a mapping relationship to allocate computing resources. The method includes the following steps:

[0067] Assuming that the number of nodes in the power grid is n, the node admittance matrix Y{i, j, G, B} of the power grid is stored in the COO sparse format of row number, column number, conductance, and susceptance, and the index in the COO format is converted into CompressedSparseRow( CSR) row compression format, the row offset array vector is R, the node voltage phase angle vector is θ, and the voltage amplitude vector is V;

[0068] Step 1: Generate query table M H2Y , M N2Y , M J2Y , M L2Y

[0069] 1) Scan the node admittance matrix Y in COO format, select the elements corresponding to H matrix calculation and add them to the set H Y , generate query table M H2Y ;

[0070] a) Scan the line number i of each ele...

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Abstract

The invention discloses a GPU thread design method of power flow Jacobian matrix calculation. The method comprises the steps that: power grid data is input, and pre-processing is carried out on a node admittance matrix Y; a CPU calculates position mapping relation tables respectively between sub-matrix non-zero elements and node admittance matrix Y non-zero elements; the calculates position mapping relation tables respectively between sub-matrix non-zero elements and Jacobian matrix non-zero elements; in a GPU, injection power of each node is calculated by an injection power kernel function S; and in the GPU, non-zero elements in sub-matrixes are respectively calculated by Jacobian sub-matrix calculation kernel functions and stored in a Jacobian matrix. According to the invention, the calculation of Jacobian matrix non-zero elements is carried out by the sub-matrixes, and the judgment of branch structures of sub-matrix regional process belonging to the elements, which is required by the direct calculation process using a single kernel function, is avoided, so that the execution efficiency is improved; in addition, the non-zero elements in the sub-matrixes having identical calculation formulas are calculated in a centralized manner, so that the problem of unbalanced thread loads is solved, and the efficiency of parallel calculation is improved.

Description

technical field [0001] The invention belongs to the application field of high-performance computing in power systems, and in particular relates to a GPU thread design method for power flow Jacobian matrix calculation. Background technique [0002] Power flow calculation is the most widely used, basic and important electrical calculation in power system. In the study of power system operation mode and planning scheme, power flow calculation is required to compare the feasibility, reliability and economy of the operation mode or planning power supply scheme. At the same time, in order to monitor the operating status of the power system in real time, a large number of fast power flow calculations are also required. Therefore, when planning and designing the system and arranging the operation mode of the system, the offline power flow calculation is used; in the real-time monitoring of the power system operating status, the online power flow calculation is used. [0003] In th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 贾育培周赣冯燕钧罗雅迪李强林静怀张旭
Owner STATE GRID CORP OF CHINA
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