Analysis method of dynamic voltage based on monotonic control system theory

Abstract

The application discloses an analysis method for analyzing dynamic voltage based on monotone control system theory analysis, comprising the following steps: determining a mathematical model adopted by a power system, and obtaining a load node voltage expression, control variables and state variables according to the established mathematical model; constructing a power system input-output judgment expression according to the obtained control and state variables and the input-output monotone judgment condition, and analyzing the sign characteristics of the state components and the control components in the judgment expression according to mathematical properties; determining whether the input-output judgment expression is always greater than or equal to zero according to the sign characteristics of the variables, if yes, the system is a monotone system and satisfies the order preserving characteristics, so that the potential dynamic voltage problem is pre-judged by means of the monotone control characteristics. The application provides a novel mathematical analysis tool for the dynamic voltage problem of the power system, verifies the monotone control between the low-voltage load shedding control and the dynamic voltage, and is helpful to guide the control design and parameter selection.

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