Section electric betweenness vulnerability estimation method of power system under wind power grid connection

Abstract

The invention discloses a section electric betweenness vulnerability estimation method of a power system under wind power grid connection. The method employs an interval number to describe the fluctuation of a wind power grid-connected power, the section electric betweenness method is proposed, a circuit section electric betweenness and a node section electric betweenness are respectively sequenced according to a possibility degree section sequence method, and a vulnerable circuit and a node in wind power grid connection are identified. By the method, the vulnerable circuit and the node in thewind power grid connection can be effectively and accurately identified; and compared with a traditional power system vulnerability estimation method, the method more conforms to actual running condition of the power system after wind power grid connection and has important guidance significance to prevention of large power failure of a wind power grid-connected power system.

Description

technical field [0001] The invention relates to the field of new energy grid-connected power systems, in particular to a method for assessing the vulnerability of interval electrical betweenness of the power system under wind power grid-connected. Background technique [0002] With the rapid development of the power grid, its topological structure and physical characteristics have become increasingly complex, which greatly increases the probability and risk of power grid blackouts. For example, on November 10, 2009, a nationwide large-scale blackout occurred in Brazil, and the load loss exceeded 24 million kilowatts, causing serious impact and huge economic losses. On March 31, 2015, a serious blackout occurred in Turkey. On March 21, 2018, due to a chain reaction triggered by the circuit breaker overload protection action, a large-scale blackout occurred in the Brazilian power grid. Studies have shown that most of these blackouts are caused by cascading failures caused by...

AI Technical Summary

Problems solved by technology

On March 21, 2018, a chain reaction was triggered after the overload protection action of the circuit breaker, resulting in a large-scale power outage in the Brazilian power grid

However, due to the randomness and volatility of wind power, electrical properties such as the injected power of connected nodes, node voltage, and grid power flow will fluctuate accordingly

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