Power system cascading failure mode prediction method

A power system and cascading failure technology, applied in the field of power system cascading failure mode prediction, can solve problems such as not considering meteorological factors and single topology

Inactive Publication Date: 2014-11-26
ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +1
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Problems solved by technology

[0004] At present, the biggest problem encountered in the establishment of power system cascading failure mode prediction indicators is: when establishing indicators for the real-time operating parameters of the power sys

Method used

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  • Power system cascading failure mode prediction method
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  • Power system cascading failure mode prediction method

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Embodiment

[0026] A method for predicting cascading failure modes of a power system includes the following steps:

[0027] Step a. Calculate the steady-state power flow of the system before the initial failure: adopt the load growth method of simultaneous increase of active and reactive power, and use the interior point method to obtain the power flow solution of the critical state before the initial failure of the system.

[0028] The interior point method is an optimization algorithm for solving nonlinear programming problems in the prior art. It can be used for the calculation of load margin in voltage stability problems, ATC (available transmission capacity), OPF (optimal power flow), etc., and it is in convergence And computing speed has irreplaceable advantages. The interior point method is used to calculate the critical state power flow of the system after the failure of the cascading failure, and the state variables of the power grid at the critical moment when the system may collapse...

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Abstract

The invention discloses a power system cascading failure mode prediction method, and relates to the technical field of power system cascading failure mechanism analysis. The power system cascading failure mode prediction method of the invention comprises the following steps: a, the steady-state power flow of a system before an initial failure is calculated; b, the comprehensive vulnerability index is calculated; c, the initial failure is determined; d, the comprehensive vulnerability index after failure is calculated; e, the comprehensive margin index Cij(s+1) of the system after failure is calculated; f, the (s+1)-level failure is determined; and g, whether the search termination condition is met is judged. According to the power system cascading failure mode prediction method of the invention, the possible cascading failure mode of the system is predicated by combining the power grid structure and state parameters, the predication indexes are combined with the actual situation of the power system, the calculation speed is high, a cascading failure set having a serious effect on the system is worked out and analyzed, and prevention of major blackout accidents caused by cascading failure can be enhanced.

Description

Technical field [0001] The invention relates to the technical field of power system cascading failure mechanism analysis, and in particular to a power system cascading failure mode prediction method. Background technique [0002] The large-scale interconnection of modern power grids has made the safety and stability of the power system more and more complicated, and bad weather will also cause the "fault aggregation" phenomenon of the components in the power system, resulting in many large-scale power outages in the power system. Had a catastrophic impact. Cascading failures are considered to be the main cause of these serious accidents. How to reasonably reflect the relationship between subsequent events and initial disturbances has become one of the hot spots in cascading failure mechanism analysis. Analyzing the development process of blackout accidents at home and abroad, it can be found that after the initial failure, the topology of the system changes, and certain componen...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
Inventor 白加林刘明忠唐建兴马覃峰袁汉云朱椤方王平李华强邱晓燕周步祥舒勤滕欢刘念陈实
Owner ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD
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