A Lightning Tracking Based Electromechanical Disturbance Propagation Control Method for Interconnected Grid

Abstract

This application discloses a method for controlling the propagation of electromechanical disturbances in an interconnected grid based on lightning tracking, including: based on lightning detection and lightning prediction technology, performing lightning tracking and lightning strike prediction on two interconnected grid areas; adjusting the SMES on both sides of the interconnected grid in advance according to the prediction results The control strategy of the controller: the SMES controller on the power grid side in the non-lightning strike area adopts the disturbance zero transmission control strategy based on the disturbance propagation characteristics to isolate the disturbance propagation of the interconnected grid, and suppress the disturbance from spreading to the non-lightning strike area grid; the SMES controller on the grid side in the lightning strike area adopts The disturbance quelling strategy based on the transient energy function method accelerates the attenuation of the transient energy of the power grid in the fault area, and realizes the quelling control of the disturbance. The invention can restrain the disturbance from propagating to the power grid in the non-lightning strike area, and realize the fast pacification of the disturbance, so as to ensure the safe and stable operation of the entire interconnected power grid.

Description

technical field [0001] The invention belongs to the technical field of interconnection grid security, and relates to a method for controlling the transmission of electromechanical disturbances in an interconnection grid based on lightning tracking. Background technique [0002] With the continuous expansion of the scale of the power grid, the connection between the regional power grids is getting closer. In order to obtain greater economic benefits and promote the rational use of energy, the interconnection between the regional power grids has become an inevitable trend. As a complex dynamic system with high dimensionality, strong nonlinearity and hierarchical distribution, the regionally interconnected large power grid is always under the action of various random disturbances. Along with the development of the power system, lightning has always been a major natural factor that endangers the safety of the power grid and causes partial or large-scale power outages. [0003] ...

AI Technical Summary

Problems solved by technology

[0005] At present, the method of using energy storage devices to improve the stability of the power system starts from the perspective of enhancing the damping of the entire system. After a lightning strike occurs in a certain area of ​​the power grid, the power and frequency of the system will oscillate with the propagation of the disturbance, which may cause protection. The malfunction of the device may even make the system exceed its static stability limit, directly threatening the safe and stable operation of the power grid in multiple interconnected areas

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