Power system transient stability digital simulation computation model and algorithm thereof

A technology of transient stability and digital simulation, which is applied to electrical components, circuit devices, AC network circuits, etc., can solve the problems of difficult transient stability real-time digital simulation, large calculation amount of power grid simulation model, and complicated programming implementation, etc., to achieve reduction Effects of programming difficulty, calculation reduction, and simulation calculation simplification

Inactive Publication Date: 2014-03-05
CHINA THREE GORGES UNIV
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Problems solved by technology

In the traditional method of alternate solution, as described in the computer-network interface calculation methods 2 and 3, the dq-axis conversion calculation of each generator is carried out in the solution of the grid algebraic equations, so that the grid simulation model becomes a time-varying nonlinear algebraic equations , so the power grid simulation model has a large amount of calculation and the programming is more complicated
However, the Newton’s method described in Computer-Network Interface Calculation Method 4 is to simultaneously solve Equation 1 and Equation 2 in Equation (1). Although it has the advantages of high calculation accuracy, the amount of calculation per time step is also large, and the above methods are not easy to form Parallel computing model for real-time digital simulation of large-scale power system transient stability

Method used

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  • Power system transient stability digital simulation computation model and algorithm thereof
  • Power system transient stability digital simulation computation model and algorithm thereof
  • Power system transient stability digital simulation computation model and algorithm thereof

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Embodiment Construction

[0032] The specific solution process of the present invention is illustrated through three parts: the formation of the power grid simulation model, the formation of the generator set simulation model, and the alternate solution calculation of the simulation model.

[0033] 1. Formation of power grid simulation model

[0034] The grid mathematical model includes the generator stator winding voltage equation and the n-node grid complex linear algebraic equation YU=I, in which the variables in each generator stator winding voltage equation are the variable values ​​described on the same dq axis or xy synchronous coordinate axis , form the power grid simulation model according to this mathematical model.

[0035] When the generator considers the transient saliency effect, the voltage equation of the stator winding of the generator cannot be expressed by a simple complex number relationship, and the equations must be expressed separately for the d-axis and q-axis equivalent winding...

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Abstract

The invention provides a power system transient stability digital simulation computation model and an algorithm thereof, and belongs to the field of power system digital simulation. In the traditional machine-network interface algorithm, the conversion computation of a dq axis of each generator is solved in grid node voltage algebraic equations, so that the power system simulation model becomes time variant nonlinear algebraic equations. In the invention, the conversion computation of the dq axis of each generator is solved in a simulation model of each generator set, so that the power system simulation model becomes time invariant linear algebraic equations, and a calculated amount of the power system simulation model during alternate solving is largely reduced. The power system transient stability digital simulation computation employing alternate solving is simplified, a physical significance of the model is clearer, and the programming difficulty is remarkably reduced; and the computation of the simulation model of each generator set during alternate solving is decoupling, so the practical power system transient stability digital simulation parallel computation model can be formed.

Description

technical field [0001] The invention relates to a power system transient stability digital simulation calculation model and an algorithm thereof, belonging to the field of power system digital simulation. Background technique [0002] In transient stability analysis, the general form of the whole system mathematical model of power system can be written as: [0003] x · = f ( x , U ) I ( x , U ) = YU - - - ( ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 朱建国危雪刘淑军
Owner CHINA THREE GORGES UNIV
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