Method and system for setting injection detection signal parameters and quantitatively evaluating injection effect

The invention discloses an injection detection signal parameter setting and injection effect quantitative evaluation method and system, and the method comprises the steps: determining a selection basis of a detection signal frequency/frequency band based on an injection equipment control performance constraint, a power grid operation constraint and a measurement equipment performance constraint, and determining the detection signal frequency/frequency band; based on injection equipment control performance constraints, power grid operation constraints and measurement equipment performance constraints, in combination with detection signal frequencies/frequency bands, determining a selection basis of detection signal amplitudes; determining an injection time period of the detection signal; defining the voltage fluctuation ratio of the converter sub-module as an evaluation index for quantitatively evaluating the influence of the active injection strategy on the control performance of the converter; and defining a