Analysis method and system for power system cascading failure risk under lightning disaster weather
A technology of cascading failures and lightning disasters, which is applied in the field of power systems and can solve problems such as rare cascading failures
Active Publication Date: 2020-11-03
GUANGZHOU POWER SUPPLY CO LTD +1
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- Claims
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Problems solved by technology
At present, relevant research mainly focuses on the impact of disaster weather on the failure probability of a certain line or the overall reliability of the power system, and the research on cascading failures caused by disaster weather is still relatively rare.
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[0027] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.
[0028] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly co...
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The invention relates to an analysis method and system for the power system cascading fault risk in the lightning disaster weather. The analysis method comprises the following steps: obtaining lightning information in three successive time periods according to a lightning monitoring and positioning system; identifying and dividing lightning zones, determining the center coordinates and the radiusof each lightning zone and determining the most likely moving paths of the lightning zones in different time periods; forecasting the number of lightning falls in the next time period and the information of each lightning zone; calculating the lightning trip-out probability of the line affected by the lightning disaster weather in the power system; simulating the cascading faults caused by the affected line; and calculating the risk of the cascading fault path and the cascading fault risk of the power system in the lightning disaster weather. The cascading fault risk of the power system in thelightning disaster weather can be warned in real time, and the method and the system can be used for analyzing and comparing the influence of different operation strategies or different constructionschemes on the power system risk in the lightning disaster weather.
Description
technical field [0001] The invention relates to the field of power systems, in particular to a method and system for analyzing the risk of cascading failures of power systems in lightning disaster weather. Background technique [0002] In recent years, there have been many power system blackouts around the world, which have caused huge economic losses and serious social impacts to various countries. Disastrous weather such as ice and snow, lightning, or typhoon is often the cause of power outages, such as the large-scale power outage caused by ice and snow in southern China in 2008, and the blackout caused by lightning faults in Brazil in November 2009. Most of these blackouts are caused by cascading failures. Therefore, it is of great significance to carry out the research on cascading fault search to prevent blackouts, reduce the risk of fault expansion, and ensure the safe and stable operation of the power system. [0003] The existing methods are mainly based on DC ste...
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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/0639G06Q50/06
Inventor 熊文林鸿基阳曾文福拴赵宏伟尚慧玉陈明辉
Owner GUANGZHOU POWER SUPPLY CO LTD