Looped network quick splitting method and device

Abstract

The invention discloses a looped network quick splitting method. The looped network quick splitting method comprises: separately acquiring the voltages of two buses and the current of a bus coupler; separately acquiring contacts for tripping a bus coupler circuit breaker during backup protection actions of two main transformers; arranging a looped network operation pressure plate, and identifyinga looped network operation line; tripping the looped network operation line of the bus so as to achieve looped network quick splitting when the bus coupler circuit breaker is tripped during backup protection actions of the main transformers, and the bus coupler power direction flows to the bus. The invention also discloses a looped network quick splitting device for implementing the method. The invention solves the problem that the main transformer backup protection is not selectively tripped due to refusal of the single-weight line protection device, thereby causing the multi-station pressureloss, through the looped network quick splitting logic.

Description

technical field [0001] The invention relates to the field of power grid dispatching communication, in particular to a method and device for fast decoupling of a ring network. Background technique [0002] In order to meet the needs of rapid social and economic development, my country's power grid has gradually increased in scale and voltage level. After decades of rapid development, it has become one of the largest and most complex power grids in the world. The safe and stable operation of the power grid and the Power supply reliability requirements are getting higher and higher. 110kV power grid wiring generally adopts closed-loop design and open-loop operation, and multi-level series supply is common, and the reliability of power supply is not high. For areas with developed economy, heavy power supply load and serious shortage of 220kV power points, from the perspective of economy and reliability, the 110kV two-section busbars of 220kV substations are usually operated in p...

AI Technical Summary

Problems solved by technology

110kV power grid wiring generally adopts closed-loop design and open-loop operation, and multi-level series supply is common, and the reliability of power supply is not high

For areas with developed economy, heavy power supply load and serious shortage of 220kV power points, from the perspective of economy and reliability, the 110kV two-section busbars of 220kV substations are usually operated in parallel via bus-connection, and the double-circuit lines of 110kV lines are also operated in parallel. , due to the single configuration of 110kV system protection, when the 110kV line fails, and the corresponding protection device refuses to operate due to device failure, principle mismatch, setting error, etc., it may cause backup protection of all main transformers in the 220kV substation Leapfrog tripping, and non-selective expansion of the scope of power outages, resulting in voltage loss at multiple stations, seriously threatening the safety of the power grid

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