An emergency control method based on cascading fault damage degree index
A technology of damage degree and emergency control, applied in the direction of emergency protection circuit devices, AC network circuits, electrical components, etc., can solve the problems of not being able to formulate emergency control measures, long interval time, short interval time, etc.
Active Publication Date: 2018-02-13
NARI TECH CO LTD +2
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Problems solved by technology
In the initial stage of cascading failures, the time interval between two-level failures may be long, and it is even difficult to predict the occurrence of next-level failures through upper-level failures. Obviously, this stage is not suitable for implementing emergency control measures with high control costs; In the late stage of cascading fault development, the interval between two-level faults is short, and emergency control can be implemented at this stage, but it is generally too late to formulate precise emergency control measures based on real-time information
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[0025] The present invention will be described in further detail below with reference to the accompanying drawings and examples.
[0026] figure 1 It is a flowchart of the method of the present invention. according to figure 1 , when the method of the present invention is adopted, real-time operation data and security and stability control strategy information of the power grid are obtained in real time from the energy management system and the safety and stability control device through the communication interface, and the real-time operation data of the power grid includes network parameters and topology of the power grid, Generator output, load, and injection volume of each node of the system. The safety and stability control strategy information includes currently optional control measures, lines, transformers, and actual measured data of generators. When the power grid fails, execute figure 1 Steps 1)-4).
[0027] figure 1 Step 1 in the above describes the calculatio...
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The invention discloses an emergency control method based on a cascading failure damage degree index, which belongs to the technical field of electric power system and automation thereof. According to the operating state of the power system when cascading faults occur, the present invention evaluates the damage caused by cascading faults to the system, considers the impact of faults on the operating state of other components, network topology, and load loss, and then according to the initial fault caused Based on the redistribution of the power flow, the subordinate faults are predicted, and the degree of damage is evaluated on this basis, so as to assist in judging the development process of cascading faults according to the value of the damage degree and the growth trend, so as to judge whether emergency measures must be taken in time after the fault has occurred. Control measures, and then take corresponding countermeasures to block cascading failures.
Description
technical field [0001] The invention is used in the field of electric power system and its automation, more precisely, the invention relates to an emergency control method based on the damage degree index of cascading faults. Background technique [0002] With the rapid development of the power industry, with the access of a large number of new energy sources and the commissioning of flexible AC transmission equipment, the safe and stable operation of the power system is facing great challenges. Cascading failures of power systems with low probability and high risk may still occur under certain conditions. When cascading failures occur, timely and effective control measures must be taken to block them. In the initial stage of cascading failures, the time interval between two-level failures may be long, and it is even difficult to predict the occurrence of next-level failures through upper-level failures. Obviously, this stage is not suitable for implementing emergency contr...
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IPC IPC(8): H02H7/28H02J3/00
Inventor 薛峰周野宋晓芳严向前
Owner NARI TECH CO LTD