Intelligent power grid safety and stability early-warning and control method

Abstract

The invention relates to an emergency protection circuit device capable of completing automatic switching when an AC-DC power grid is in an abnormal state, and in particular relates to an intelligent warning and control method dedicated for ensuring safety and stability of the power grid. The method comprises the steps that: an intelligent control master station acquires real-time data of the power grid through an EMS (energy management system), and an intelligent control substation in each zone real-timely monitors the bus voltage of the zone, power-receiving channel overload, main transformer overload in the zone and voltage instability of the power grid in the zone, and starts the power grid safety and stability control operation; the acquired real-time data of the power grid is integrated with the information uploaded by each substation to real-timely form tide section data of the power grid, and the safety and stability of the power grid are evaluated online; and safety and stability early-warning information of the power grid is provided by using the real-time operation data of the power grid to realize safe and stable control of the power grid and to realize the function of the second line of defense of the power system. The method provided by the invention can ensure safe and stable operation of the power grid by regulating a stability control device according to the running condition of the power grid.

Description

Technical field [0001] The invention relates to an emergency protection circuit device that can complete automatic switching when an abnormal state occurs in an AC and a DC power grid, in particular to an intelligent early warning and control method dedicated to the safety and stability of the power grid. Background technique [0002] Energy Management System (EMS) is currently an important tool for online analysis of provincial and regional power grid dispatch centers. It plays an important role in assisting dispatchers in decision-making. It is an indispensable tool for dispatch centers. Its main functions are divided into basic functions and application functions. Consisting of parts. Basic functions include computer, operating system and EMS support system. Application functions include data acquisition and monitoring (SCADA), power generation control (AGC) and planning, and network analysis. Traditional EMS uses online data for analysis and calculation, but the application...

AI Technical Summary

Problems solved by technology

With the continuous increase of power receiving ratio and capacity of the power grid, as well as changes in the operation mode of the power grid, especially the implementation of partitioned operation, the potential threat to the security and stability of the power grid is increasing, and only the third line of defense is guaranteed. The stable operation of isolated partitions is relatively difficult. Once such an accident occurs, it is likely to cause the collapse of the local system, directly threatening the safety and stability of the partitioned power grid and even the entire large power grid.

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