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       In recent years, the scale of transmission network in our country is more and more big, the structure is more complex, and worldwide by flow transfer blackouts in power system caused by the frequent occurrence of. Due to the fault and other factors, some bear important critical load line once removed and consequent transfer power flow and the backup protection, unreasonable action chain reaction, cascading trips may lead to system, and then lead to blackouts, bring inestimable loss to the social and economic. According to power flow transfer identification adaptive line backup protection, not only stand in the perspective of the whole grid for effective identification of susceptible to influence the flow transfer the key line, standing in the perspective of the design of relay protection on the line over load to effectively identify and improve the backup protection against transient resistance. Therefore, this research has important practical significance to prevent blackouts and related protection device reliability.

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5Â¥2016-03-03 11:23:58
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songmai: ½ð±Ò+100, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ·­ÒëµÄºÜºÃ лл´óÉñ 2016-03-03 21:17:01
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In recent years, China's electrical grid has gained the development of increasingly large scale and increasingly complex structure, however in the global view, large-scale blackout occurs frequently due to  power flow transferring. Due to some fault factors, some critical lines which undertake important loads are cut, it will cause negative chain reactions such as power flow transferring and improper operation of backup protection, which will probably cause system cascading trips. thus leading to large-scale blackouts and bringing inestimable loss of socio-economy. Regarding adaptive backup protection for identification line of power flow transfer, it is suggested not only to effectively identify the critical lines that are vulnerable to power flow transferring in the perspective of overall power grid, but also to effectively identify the overload and increase the resistance capacity of backup protection to transition resistance in the perspective of protective relay design. Therefore, this research is of vital significance to the prevention of large-scale blackouts and to improvement of reliability of backup protection.
6Â¥2016-03-03 12:07:51
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songmai: ½ð±Ò+50, ¡ï¡ï¡ïºÜÓаïÖú, лл ´óÉñ 2016-03-03 21:17:27
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