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A method and system for identifying strong correlation transmission section in transient power angle stability mode

A technology for transient power angle stabilization and power transmission cross-section, which is applied to electrical components, circuit devices, AC network circuits, etc., and can solve problems such as prone to misjudgment and unclear physical meaning

Active Publication Date: 2022-08-09
NARI TECH CO LTD +3
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Problems solved by technology

This method uses the line power fluctuation amplitude as the screening index of the line composed of the key transmission section of the transient power angle stability, the physical meaning is not clear, and it is easy to misjudgment

Method used

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  • A method and system for identifying strong correlation transmission section in transient power angle stability mode
  • A method and system for identifying strong correlation transmission section in transient power angle stability mode
  • A method and system for identifying strong correlation transmission section in transient power angle stability mode

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Embodiment 2

[0046] In this embodiment, the transient power angle stability mode refers to a model obtained by quantitative analysis of transient power angle stability based on time-domain simulation of the primary and secondary equipment detailed models of the power grid for a set expected fault under the set grid operation mode. Generator grouping mode. The generator grouping mode can be the dominant mode with the smallest transient power angle stability margin, or other non-dominant modes. The quantitative analysis method of transient power angle stability is the Extended Equal Area Method (EEAC).

[0047] On the basis of the above embodiment:

[0048] In S2, specifically, if the margin of TAS-M is not less than 0, calculating the voltage fluctuation index V of each node by formula (1) f ; If the margin of TAS-M is less than 0, first set N to 1, t 1 Set it to the time corresponding to δ(t) equal to 180°, and then calculate the voltage fluctuation index V of each node by formula (1). f...

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Abstract

The invention discloses a method and a system for identifying a strong correlation power transmission section in a transient power angle stability mode, and the difference between the rotor inertia center angles of the leading group generators and the lagging group generators in the transient power angle stability mode reaches a maximum value or 180 The node with the larger ratio of the average fluctuation amplitude of the node voltage to the initial value at the moment ° is regarded as the oscillation center associated node of the transient power angle stabilization mode, and the associated node of the oscillation center near the corresponding moment is directly connected to the voltage phase angle of each point on the branch The minimum value of the average deviation from the mean value of the rotor inertia center angle of the complementary group generators is used as a strong correlation indicator for the transient power angle stability mode of the branch, and the leading group generators and the lagging group generators are divided into two different connected network cut-set combinations The transmission section corresponding to the cut set with the smallest number of branches and the smallest sum of the strong correlation indicators of the transient power angle stability mode of the branches is regarded as the strong correlation transmission section of the transient power angle stability mode, which meets the actual needs of the power grid regulator and operator and is convenient for operation. master.

Description

technical field [0001] The invention relates to the technical field of power grid dispatching operation and control, in particular to a method and system for identifying a strongly correlated power transmission section in a transient power angle stability mode. Background technique [0002] Under the condition that the grid structure remains unchanged, the safety and stability of the power grid is mainly related to the generator output and load size of each node. In order to balance the changes in load / new energy power generation and maintain the voltage and frequency of the power grid, it is necessary to adjust the generator power in time. contribute. In order to control the safety and stability characteristics of the power grid, power grid regulators need to monitor the changes in load and power generation. Due to the large number of loads and generators, it is difficult to comprehensively monitor them. Usually, the power monitoring of transmission sections is used to judg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCY02E60/00
Inventor 徐泰山王轶禹任先成冯长有查显煜张金龙王毅徐奇峰
Owner NARI TECH CO LTD
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