Coordinated setting method of under-excitation limitation and loss-of-excitation protection based on power plane

Abstract

The invention provides a matched setting method of minimum excitation limiting and loss-of-field protection based on power plane. The method comprises the steps of calculating a pure power static stable boundary equation of a power generator on a power plane, calculating the static stable boundary according to a system least operation mode of the pure power static stable boundary equation, obtaining loss-of-field protection and minimum excitation limiting which are set according to the static stable boundary, then adjusting the matching coefficient between a minimum excitation limiting wire and the static stable boundary using the phase entering thickness of the power generator as a restraining condition, thereby ensuring matching between minimum excitation limiting and loss-of-field protection which is set according to static stability. The matched setting method has advantages of settling a technical problem of mismatching between minimum excitation limiting and loss-of-field protection of the power generator, improving coordinate matching capability between the power generator and a power grid, and improving stable operation level of an electric power system.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to a coordinative setting method of low excitation limitation and loss-of-excitation protection based on a power plane, which is mainly suitable for solving the technical problem of mismatch between low-excitation limitation and loss-of-excitation protection of generators. Background technique [0002] Scholars at home and abroad have done a lot of research on the cooperation between generator low excitation limit and loss of excitation protection. As the basis of coordination between under-excitation limitation and loss-of-excitation protection, the locus of the static stability boundary of the generator is very important. The static stability boundary of the generator is reflected in the machine end of the generator, and it is widely used: the stator criterion of the loss of excitation protection, the control criterion of the low excitati...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects and problems existing in the prior art that the generator low-excitation limitation and loss-of-excitation protection do not match, and to provide a generator low-excitation limitation and loss-of-excitation protection adaptive cooperation based on power plane low-excitation Coordination setting method of limit and loss of excitation protection

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