Control method and system for avoiding large-area power outages after partial power grid disconnection

Abstract

The embodiment of the invention discloses a control method and system for avoiding large-area blackout after local power network splitting, and aims at solving the technical problem that stability control after local power network splitting cannot be achieved due to the fact that a start-up dead zone exists in FCB of a traditional unit thermal power unit. The method disclosed by the embodiment of the invention comprises the steps of obtaining a fault instruction that a tie line of a regional power network and a main network is broken; carrying out splitting of the regional power network and an external power network through a preset splitting point according to the fault instruction and concertedly starting a first FCB strategy function corresponding to a unit in the split regional power network in the distance through first-level control; and if the FCB strategy function corresponding to the unit in the split regional power network is not concertedly started in the distance by the first-level control or splitting of the regional power network and the external power network cannot be carried out through the preset splitting point, splitting and starting a second FCB strategy function of a local unit in the regional power network through second-level control.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a control method and system for avoiding large-area power outages after partial power grids are disconnected. Background technique [0002] The continuous expansion of the scale of the modern interconnected grid greatly improves the performance of the power system and meets the rapid development of the national economy. At the same time, due to the expansion of power supply scale, the loss caused by grid failure will be even greater. The power system is recognized as the most complex man-made system. As a network structure, local faults may induce chain reactions, leading to large-scale blackouts and even the collapse of the entire power grid. How to minimize the scope of power outages and reduce the scale of power outages after a serious power grid failure is a thorny problem faced by the dispatching and operation of modern complex large power grids. At present, the rel...

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