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GPU (graphic processing unit) based parallel power flow calculation system and method for large-scale power system

A large-scale power and system flow technology, applied in the direction of complex mathematical operations, etc., can solve problems such as frequent data access and writing, low program performance, and small data volume

Active Publication Date: 2014-03-05
STATE GRID CORP OF CHINA +1
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  • Description
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AI Technical Summary

Problems solved by technology

In the process of numerical decomposition of our program, the overall data volume is not large, but the number of data access and writing is frequent, which leads to low program performance

Method used

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  • GPU (graphic processing unit) based parallel power flow calculation system and method for large-scale power system
  • GPU (graphic processing unit) based parallel power flow calculation system and method for large-scale power system
  • GPU (graphic processing unit) based parallel power flow calculation system and method for large-scale power system

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Embodiment Construction

[0066] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0067] For a power network with N nodes (the ground is not included as a reference node), if the network structure and component parameters are known, the network equation can be expressed as

[0068] Y V · = I · - - - ( 1 )

[0069] In formula (1), Y is the N×N order node admittance matrix; is the N×1-dimensional node voltage column vector; Injects a current column vector for an N×1 dimensional node. If the non-linearity of the network elements and the phase-shifting transformer are not considered, then Y is a symmetric matrix.

[0070] In power system calculation, the given operating variable is the node injection power, not the node inject...

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Abstract

The invention relates to a GPU (graphic processing unit) based parallel power flow calculation system and method for a large-scale power system. The system comprises a symbol Jacobian matrix forming and decomposing module, an initialization module, a power flow equation right-hand side calculation module, a jacobian matrix assignment module, an LU decomposing module and a forward and backward substitution module; the symbol Jacobian matrix forming and decomposing module is located on a host side, and the host side transmits calculating data to an equipment side; the power flow equation right-hand side calculation module, the jacobian matrix assignment module, the LU decomposing module and the forward and backward substitution module are sequentially connected on the equipment side. The method includes (1) transmitting data needed by calculation to the host side entirely; (2) generating a symbol Jacobian matrix and performing symbol composition on the symbol Jacobian matrix; (3) transmitting a decomposition result by the host side to the equipment side; (4) executing power flow equation right-hand side calculation; (5) executing Jacobian matrix assignment; (6) executing LU decomposition; (7) executing forward and backward substitution.

Description

technical field [0001] The invention belongs to the technical field of power grid simulation, and in particular relates to a GPU-based large-scale power system power flow parallel computing system and a method thereof. Background technique [0002] The task of power flow calculation is to determine the operating status of the system according to the given operating conditions. Specifically, the wiring mode, parameters and operating conditions of the power grid are known, and the bus voltage, branch current, power and network loss of the power system in steady state operation are calculated. For the running system, through the power flow calculation, it can be judged whether the grid bus voltage, branch current and power exceed the limit, and if so, adjust the operation mode. For the power system being planned, the power flow calculation can provide a basis for selecting the power supply method and electrical equipment of the grid. In addition, the power flow calculation ca...

Claims

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Application Information

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IPC IPC(8): G06F17/16
Inventor 陈德扬江涵徐得超李亚楼
Owner STATE GRID CORP OF CHINA
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