Correcting and controlling method of interconnecting structure for improving power-angle oscillation of hydroelectric generating set

Abstract

The invention relates to a correcting and controlling method of an interconnecting structure for improving the power-angle oscillation of a hydroelectric generating set, comprising the following steps of: increasing the association factor of the power-angle of the set and the gate opening based on the structural matrix analysis of a Hamiltonian model of the hydroelectric generating set, i.e. increasing the association among the parameters based on dynamic mechanism inter-associated with the system and designing a corresponding control law to be equivalent to the change of the structure; putting forward the variable structure control policy combined by the algorithm of the invention and the conventional control algorithm to realize control of the set through analyzing the applicability of the equivalent control low; and putting forward corresponding solutions for the problems of controlling to output phase step and the like. Simulation shows that the control algorithm provided by the invention can improve the oscillation characteristic of the power-angle of the set effectively and maintain the stability of the set even under lower damp.

Description

technical field The invention relates to the technical field of hydroelectric generating set control, in particular to an interconnection structure correction control method for improving power angle oscillation of a hydroelectric generating set. Background technique The weak damping problem existing in the long-distance networking of large hydroelectric generating units is an important factor affecting the stability of the power grid. Although the research and application of PSS and grid-side FACTS equipment provide an effective way to solve this problem. However, due to the complexity of the grid side, there are some difficulties in both theoretical analysis and practical application. Therefore, taking effective measures on the unit side to improve the stability of the weakly damped power system has always been a hot research topic. From the perspective of unit parameter oscillation characteristics, the power angle of the generator can reflect its mechanical and electri...

AI Technical Summary

Problems solved by technology

However, the internal parameter association mechanism provided by the Hamiltonian model has not been fully utilized in the study

The main reason is that the control design to improve system performance by controlling injection damping is in its infancy in theory and method, and some current applications can only deal with simple systems below the third order

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