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A Simulation Method of Power System Transient Stability Based on Network Node Number Optimization

A network node and transient stability technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of not considering the power network nodes, etc., achieve the effect of shortening the path length, speeding up the solution, and improving the simulation speed

Inactive Publication Date: 2016-11-02
ZHEJIANG UNIV
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Problems solved by technology

They either aim at the minimum new element of factor table decomposition, or at the shortest average road length of all nodes. Although good results have been achieved, they do not consider the characteristics of the power network nodes themselves and the transient stability of the power system. The characteristics of the network equation, there is still room for improvement

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  • A Simulation Method of Power System Transient Stability Based on Network Node Number Optimization
  • A Simulation Method of Power System Transient Stability Based on Network Node Number Optimization
  • A Simulation Method of Power System Transient Stability Based on Network Node Number Optimization

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with accompanying drawing.

[0048] Such as figure 1 As shown, the present invention proposes a power system transient stability simulation method based on the smallest active predecessor node numbering algorithm with a small out-of-line degree, including the following steps

[0049] Step 1: Input the raw data and information of the power system;

[0050] Step 2: If figure 2 As shown, the node numbering algorithm of the power system network is optimized by using the minimum active predecessor node numbering algorithm with a small out-of-line degree:

[0051] 2.1 Initialization, set the number of numbered nodes n=0, each node number f(i)=0, indicating that it has not been numbered, i is the current position of the node, set each node F(i)='false', F(i) ='ture' indicates that node i is the last node added in the connected path subtree of the numbered nodes where it is located, that is, the boundary n...

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Abstract

The invention discloses a power system transient stability simulation method based on network node numbering optimization. A sparse vector technology is widely applied to power system calculation. However, existing network node numbering methods applied to sparse vectors aim to achieve the purpose that the average forward and backward substitution calculation amount of all nodes is the smallest, and the characteristic that forward and backward substitution only needs to be conducted on active nodes during transient stability simulation is not taken into consideration. According to the power system transient stability simulation method, the characteristic that the sparse structure of an independent vector of a network algebraic equation and the sparser structure of a solution vector are identical and decided during transient stability simulation is fully considered, the network nodes are divided into active nodes and passive nodes, the out-degrees of the nodes, the number of active precursor nodes and the number of the precursor nodes are fully considered, the network nodes are numbered, under the condition that the number of newly increased elements of a factor table is small, the average path length of the active nodes is made the smallest, and no requirement for the path tree lengths of the passive nodes exists. By the adoption of the power system transient stability simulation method, the calculation amount of solving a differential algebra equation set during transient stability simulation of a power system can be remarkably reduced.

Description

technical field [0001] The invention belongs to the field of power system automation, and in particular relates to a power system transient stability simulation method based on an algorithm for numbering the smallest active predecessor node with a small out-of-line degree. Background technique [0002] Power system transient stability analysis is one of the most basic and core contents in power system analysis and calculation. Advanced technologies such as online dynamic security analysis, security and stability emergency control, preventive control, and intelligent dispatching have been gradually required to be popularized and applied in power systems. The precondition for realizing these advanced technologies is fast, accurate and reliable transient stability simulation calculation for large-scale power systems. [0003] Numerical integration is the most accurate and reliable method for power system transient stability calculation. The biggest disadvantage of the numeric...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 肖谭南王建全高一凡黎萌张春燕张仲驰
Owner ZHEJIANG UNIV
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