Electric system low frequency oscillation aid decision making method based on operation mode sensitivity

An operation mode and technology to assist decision-making, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as adjustment strategies that do not have a quantifiable operating state of the power grid, and achieve adjustment, improve system damping, and suppress low frequency. oscillating effect

Active Publication Date: 2013-09-25
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
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Problems solved by technology

[0005] In the specific implementation process, the adjustment of the operation mode depends more on the experience and attempt...

Method used

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  • Electric system low frequency oscillation aid decision making method based on operation mode sensitivity
  • Electric system low frequency oscillation aid decision making method based on operation mode sensitivity
  • Electric system low frequency oscillation aid decision making method based on operation mode sensitivity

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Embodiment Construction

[0076] The specific embodiment of the present invention will be further described in detail in conjunction with the accompanying drawings.

[0077] This embodiment takes the active power of the unit in the operation mode as an example to make the following description. Generally speaking, the implementation process can be divided into four steps, which are:

[0078] Small disturbance stable calculation of the system;

[0079] Screening mode - establish an auxiliary decision-making optimization model;

[0080] Iterative solution to optimization problems;

[0081] Auxiliary decision policy table summary.

[0082] The flow of this embodiment is as follows figure 1 shown, including:

[0083] (1) Calculation of small disturbance stability:

[0084] Input relevant power grid parameters including load, generator, line, transformer, etc., and call the power flow program to calculate the steady state equilibrium point of the system; input includes generator, excitation regulator, ...

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Abstract

The invention discloses an electric system low frequency oscillation aid decision making method based on operation mode sensitivity. On account of low frequency oscillation possibly existing in an electric system, the operation of constructing objective function is performed to the sensitivity index of the operation mode by applying a characteristic value, and a policy table for adjusting the operation mode of the system is obtained through optimizing calculation, so that low frequency oscillation aid decision making is performed. The method combines the sensitivity index with an active adjustment scheme, the unit with the larger sensitivity index is utilized to take part in output adjustment, and the unit with the smaller sensitivity index performs output balance, so that the purposes that the operation mode (active power) of the electric system is adjusted to improve small-signal stability of the system and restrict the low frequency oscillation are realized. The method is also suitable for reactive and voltage adjustment aid decision making in the low frequency according to the sensitivity index.

Description

technical field [0001] The invention relates to the field of power system calculation, in particular to an auxiliary decision-making method for low-frequency oscillation of a power system based on operating mode sensitivity. Background technique [0002] With the development of the national economy and the continuous increase of electricity load, the power system is developing towards the direction of large-scale interconnected power grids. The commissioning of large-capacity thermal power plants, hydropower stations and new energy power generation, and the construction of UHV AC and DC power grids will connected into a whole. [0003] In the initial stage of the interconnection, the connection between the systems is still relatively weak, and the low-frequency oscillation of the power grid and the dynamic instability of the system are more serious. When the power of the transmission section increases or a large amount of power transfer occurs when a fault occurs, it is als...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 刘涛宋新立仲悟之汤涌吴国旸叶小晖王晓彤
Owner STATE GRID CORP OF CHINA
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