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Distributive analysis method of power system low frequency vibration

A power system, low-frequency oscillation technology, applied in the direction of reducing/preventing power oscillation, electrical components, circuit devices, etc., can solve problems that restrict the development of self-excitation methods

Active Publication Date: 2007-10-10
TSINGHUA UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above reasons restrict the development of the traditional self-excitation method

Method used

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  • Distributive analysis method of power system low frequency vibration
  • Distributive analysis method of power system low frequency vibration
  • Distributive analysis method of power system low frequency vibration

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0139] Example system description:

[0140] Take a 6-node 3-partition system as an example to illustrate the calculation process. The system includes 2 generators, 1 load, 6 buses, 3 lines and 3 transformer branches, as shown in Figure 7. System parameters (PSAT format):

[0141] Node information:

[0142] Bus.con=[...

[0143] 1 1.0 1 0 1 1;

[0144]2 1.0 1 0 2 1;

[0145] 3 1.0 1 0 3 1;

[0146] 4 1.0 1 0 1 1;

[0147] 5 1.0 1 0 2 1;

[0148] 6 1.0 1 0 3 1;];

[0149] Contact Line Information:

[0150] Line.con=[...

[0151] 6 5 100 1.0 50 0 0 0.032 0.161 0.306

[0152] 0 0 0 0 0;

[0153] 5 4 100 1.0 50 0 0 0.01 0.085 0.176

[0154] 0 0 0 0 0;

[0155] 6 4 100 1.0 50 0 0 0.017 0.092 0.158

[0156] 0 0 0 0 0;

[0157] 2 5 100 1.0 50 0 1.025 0 0.0625 0 0

[0158] 0 0 0 0;

[0159] 3 6 100 1.0 50 0 1.025 0 0.0586 0 0

[0160] 0 0 0 0;

[0161] 1 4 100 1.0 50 0 1.025 0 0.0576 0 0

[0162] 0 0 0 0];

[0163] Slack node information:

[0164] SW.con=[…

[0...

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Abstract

Belonging to the distributed simulation technique area for electric system, the disclosed method includes method for partitioning interconnected power grids with borderline partitions, and distributed calculating method (DCM) for left eigenvalue and right eigenvector of power system. DCM includes designing partitioned duplex system, distributed solving equivalent network parameter, borderline compatibility equation, and eigenvector. The invention is capable of calculating eigenvector relevant to low frequency oscillation modes from each partition so as to provide important reference for low frequency oscillation issue of interconnected power grids in large scale. The calculating procedure needs only few data including state variable of exchange boundary nodes between each partition and borderline partition. The invention is suitable to distributed environment of power grids, possessing better practicability.

Description

technical field [0001] The distributed analysis method of low-frequency oscillation of power system belongs to the technical field of distributed simulation of power system, more specifically, it relates to a small-disturbance stability analysis method of power system. Background technique [0002] In large-scale interconnected power systems, the relative swing of the rotor between generators or groups of generators often occurs and causes continuous oscillations in the absence of damping. The frequency range of oscillation is generally between 0.2 and 2.5Hz, so it is called low-frequency oscillation, or electromechanical oscillation. In recent years, low-frequency oscillations have also occurred in my country from time to time, seriously affecting the power transmission and safety and stability between power grids. In this case, research on low-frequency oscillations has attracted much attention. [0003] The operation and management of my country's regional interconnecte...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/24
Inventor 沈沉张旭王建陈颖卢强
Owner TSINGHUA UNIV
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