Emergency load shedding control method based on trace sensitivity

A trajectory sensitivity and control method technology, applied in the direction of climate sustainability, information technology support system, AC network voltage adjustment, etc., can solve the problem of large load shedding, poor economy, no consideration of transient power angle stability, transient Issues such as frequency safety and transient voltage safety

Active Publication Date: 2015-09-09
SHANDONG UNIV +3
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Problems solved by technology

[0005] In order to solve the above problems, the present invention proposes an emergency load shedding control method based on trajectory sensitivity. This method effectively solves the problem that traditional emergency load shedding control measures prevent large-capacity power supply shortage accidents. Considering the problem of ensuring

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  • Emergency load shedding control method based on trace sensitivity
  • Emergency load shedding control method based on trace sensitivity
  • Emergency load shedding control method based on trace sensitivity

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[0078] The present invention will be further described below in conjunction with the drawings and embodiments.

[0079] An emergency load shedding control method based on trajectory sensitivity includes the following steps:

[0080] Step 1: Read in the power system data through the computer, including node parameters, line parameters, generators, load parameters, etc.

[0081] Step 2: Determine the number of load shedding nodes to form the load shedding control vector P; determine the maximum load shedding amount of each load shedding node to form the maximum load shedding amount vector The selection of load shedding nodes and the maximum load shedding amount of each load shedding node can be customized by the user:

[0082] P=[p 1 ,p 2 ,...,p N ]

[0083] P ‾ = [ p ‾ 1 , p ‾ 2 , ... , p ‾ N ]

[0084] Among them, N represents the number of load shedding nodes.

[0085] Step 3: Set monitoring trajectory, transient safety and stability...

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Abstract

The present invention discloses an emergency load shedding control method based on trace sensitivity. The method comprises obtaining traces of post-accident state variables through power system transient numerical simulation, so as to solve transient security and stability allowance indicator vectors, and judging if solving emergency load shedding measures need to be carried out through transient security and stability constraint conditions; solving a trace sensitivity matrix of transient security and stability allowance indicators through power system transient numerical simulation and a numerical perturbation method, and linearizing the transient security and stability constraint conditions. The transient security and stability, including transient power angle stability, transient frequency security and transient voltage security of a post-accident system may be ensured, the load shedding cost is reduced, and economical efficiency of the measures is raised. Through trace sensitivity, the transient security and stability conditions are linearized, the original problem is converted into a linear programming problem, iteration solving is realized, and the rate of convergence is fast.

Description

technical field [0001] The invention relates to an emergency load shedding control method based on trajectory sensitivity. Background technique [0002] With the increase of power demand, in order to meet the power demand, the large-capacity power supply of the power system is gradually increasing, such as the construction of large-capacity thermal power units, the connection of UHV AC and DC, etc., when formulating emergency load shedding control measures for the power system, it is necessary to consider Bulk power supply shortage incidents due to these bulk power supplies being taken out of service. [0003] Large-capacity power supply shortage accidents are extreme accidents that will seriously deteriorate the transient safety and stability of the system in a short period of time. Transient security stability includes three aspects: transient power angle stability, transient frequency security and transient voltage security. When such extreme accidents occur, due to the...

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Application Information

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IPC IPC(8): H02J3/14
CPCY02B70/3225Y04S20/222
Inventor 张恒旭续昕李海峰罗凯明李威刘福锁李兆伟
Owner SHANDONG UNIV
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