Transient-state function comprehensive index based intelligent control method for power system transient stability

Abstract

The invention relates to a transient-state function comprehensive index based intelligent control method for power system transient stability. The intelligent control method is characterized by comprising the following steps of calculating a stability index of each branch in the oscillation process at a current running state, and determining a weakest branch and a transient stability state of a power grid; identifying most advanced power generator set; giving out active limit power adjusted by a power generator; giving out a suggested adjustment range adjusted by the power generator; and verifying whether transient stability is achieved or not. By the intelligent control method, comprehensive estimation can be made on system transient stability from angles of network potential energy and power generator kinetic energy, transient stability estimation and vulnerable cutest selection are carried out by means of branch potential energy, a control object is distinguished according to kinetic energy slope of the power generator, the adjusted suggested adjustment range is determined according to a function relation of the branch potential index and the active power of the power generator, and an intelligent control strategy for transient stability taking an energy system as a main line is built. The intelligent control method has the advantages of scientificness, reasonableness, simple computation, an accurate result, high engineering application value and the like, and is easy to implement.

Description

technical field [0001] The invention relates to the field of power system operation and control, and relates to a power system transient stability intelligent control method based on a transient energy function comprehensive index. Background technique [0002] With the interconnection of the national power grid, the transient stability of the power system has always been one of the main issues that people care about, which seriously affects the power transmission and the safe and stable operation of the power system. When the power grid is disturbed, if the transient stability control measures cannot be effectively taken, it will seriously affect the safe operation of the power grid, and if the measures are unreasonable, the system will lose stability and other serious consequences. Therefore, if an intelligent control strategy for transient stability of the interconnected grid can be constructed, it will provide an effective way for the prevention and control of transient ...

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Problems solved by technology

[0003] At present, in terms of improving and improving the transient stability control strategy of the interconnected grid, it is mainly based on the measurement of the power angle curve to construct the sensitivity of the generator power angle and the generator active power to adjust the generator output for regulation, and to use the power generation The optimal allocation is transformed into an optimization problem for solution, but the amount of information provided by the above methods is limited, and the control range is difficult to specify, making it difficult to achieve effective intelligent control

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