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Load flow calculation solvability judging method of node type extension

A technology of power flow calculation and node type, which is applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve problems such as unsolvable power flow calculation, unbalanced distribution of known and unknown quantities of nodes, irreversible correction equation of power flow calculation, etc., to achieve Good versatility and the effect of reducing the amount of calculation

Inactive Publication Date: 2010-09-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the power flow calculation with node type expansion, due to the unbalanced distribution of the known and unknown quantities of the nodes, the correction equation of the power flow calculation may be irreversible, that is, the power flow calculation with node type expansion cannot be solved

Method used

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  • Load flow calculation solvability judging method of node type extension
  • Load flow calculation solvability judging method of node type extension

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Experimental program
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Embodiment 1

[0028] like figure 1 Shown IEEE 14 node system, wherein node 1 is the third node when classified by the step (1) of the inventive method, the seventh node when classified by the step (4) of the inventive method, i.e. the Vθ node; Nodes 2 and 3 are simultaneously the fourth node when classified by step (1) of the method of the present invention and the seventh node when classified by step (4) of the method of the present invention, i.e. PV nodes; nodes 6 and 8 are simultaneously By the second kind of node when step (1) classification of the inventive method and the sixth kind node when by the step (4) classification of the inventive method, i.e. 0 node; Node 4,14 is simultaneously by the step of the inventive method (1) first kind of node during classification and the fifth kind of node when step (4) classification of the inventive method, i.e. PQVθ type node; figure 1 The remaining nodes in are simultaneously the fourth type of nodes when classified by step (1) of the method ...

Embodiment 2

[0037] still like figure 1Shown IEEE 14 node system, wherein node 1 is the 3rd kind of node when classifying by the step (1) of the method of the present invention and the seventh kind of node when classifying by the step (4) of the method of the present invention, i.e. Vθ node ; Node 2,3 are simultaneously the fourth kind of node by the step (1) classification of the inventive method and the sixth kind of node when by the step (4) classification of the inventive method, i.e. P node; Node 6,8 simultaneously For the fourth type of node when classified by step (1) of the method of the present invention and the seventh type of node when classified by step (4) of the method of the present invention, i.e. PV nodes; nodes 13, 14 are simultaneously by the method of the present invention The fourth kind of node when step (1) is classified and the fifth kind of node when by the step (4) classification of the inventive method, i.e. the PQV type node; All the other nodes are simultaneous...

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Abstract

The invention relates to a load flow calculation solvability judging method of node type extension, which belongs to the technical field of electric power system dispatching and power grid simulation. The invention provides the load flow calculation solvability judging method of the node type extension, can easily judge the load flow calculation solvability of the node type extension. The criterion comprises that according to the given condition of the known quantity of each node, the method searches whether an effective communication channel exists between the redundant node of the known quantity and the insufficient node of the known quantity, if the communication channel satisfying the condition exists, the load flow calculation of the node type extension is solvable, otherwise the load flow calculation of the node type extension is unsolvable. The method of the invention has the advantages of having good universality and being adaptable to various node type distributions in load flow calculation of an electric power system; and the method of the invention is only based on the topological structure and the node type distribution condition of the electric power system, and requires no preparing calculation.

Description

technical field [0001] The invention relates to a method for judging the solvability of power flow calculation with node type expansion, and belongs to the technical fields of power system scheduling automation and power grid simulation. Background technique [0002] Power system power flow calculation is an important basis for power system analysis, and it is used in almost all fields of power system analysis, many of which involve power flow adjustment problems. The purpose of power flow adjustment can be easily realized through the power flow calculation with node type expansion. [0003] In the power system, each node has four relevant electrical quantities: node injected active power P, node injected reactive power Q, node voltage amplitude V and node voltage phase angle θ. For a system with N nodes, there are 4N related electrical quantities. In power flow calculation, 2N electrical quantities are known and the other 2N electrical quantities are unknown. The task of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 张伯明吴文传郭烨孙宏斌
Owner TSINGHUA UNIV
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