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Method and system for identifying strong correlation power transmission section in transient power angle stabilization mode

A technology with stable transient power angle and power transmission section, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of easy misjudgment and unclear physical meaning, and achieve the effect of accurate results and easy to grasp.

Active Publication Date: 2019-06-11
NARI TECH CO LTD +3
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  • Abstract
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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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  • Method and system for identifying strong correlation power transmission section in transient power angle stabilization mode
  • Method and system for identifying strong correlation power transmission section in transient power angle stabilization mode
  • Method and system for identifying strong correlation power transmission section in transient power angle stabilization mode

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Embodiment 2

[0046] In this embodiment, the transient power angle stability mode refers to the quantitative analysis of the transient power angle stability based on the time domain simulation of the detailed model of the primary and secondary equipment of the power grid for the set expected fault under the set power 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 examples,

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

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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 stabilization mode. A node, in which the node voltage is greater than a ratio of an initial value average fluctuation amplitude and an initial value, is taken as an oscillation center correlation node in a transient power angle stabilization mode, when the rotorinertia central angle difference value of a leading front group generator and a lagging group generator in the transient power angle stabilization mode reaches the maximum value or close to 180 degrees; the maximum value in the average deviation between each point voltage phase angle in the direct connection branch of the oscillation center correlation node at the corresponding moment and the rotor inertia central angle mean value of a complementary group generator is used as a transient power angle stability mode strong correlation index of the branch; the leading front group generator and the lagging group generator are cut into a cutting combination of two different communication networks, and the power transmission section corresponding to the cutting combination with the least branches and the minimum sum of the branch transient power angle stability mode strong correlation index as the strong related power transmission section of the transient power angle stabilization mode; andthe power transmission section is matched with the actual requirements of the power grid regulation and control operation personnel and is convenient to 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 transmission section in a transient power angle stability mode. Background technique [0002] The safety and stability of the grid is mainly related to the generator output and load of each node under the condition that the grid structure remains unchanged. In order to balance the changes in load / new energy generation and maintain the voltage and frequency of the grid, it is necessary to adjust the generator in time. contribute. In order to control the safety and stability of the power grid, the power grid regulation operators need to monitor the changes in load and power generation. Due to the large number of loads and generators, it is difficult to monitor comprehensively. Usually, the power monitoring of the transmission section is used to judge the changes in the safety and stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(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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