A Precautionary Model of Power Grid Cascading Failure Based on Synergetic Theory

The synergetic concept on precaution of power system cascading failures is presented and a precautionary model for cascading failures is established,and system cascading failure risk coefficient that reflects the distance between operation point of power system and self-organized critical point as well as branch cascading failure risk coefficient that characterizes incident extent among branches of power system are led into the established model.By means of comparing the searching process of cascading failure mode with Chinese character input method for mobile phone,a hybrid method based cascading failure mode searching method is proposed.The search results by the proposed method show that by use of this model the threaten extent of cascading failures under different operating modes can be compared,and the solving process of this model can be used as the foundation to prevent single cascading failures.Thus the effectiveness and feasibility of the proposed model in the prevention of power system large-scale blackout is validated.