REN Jianmiao,XIAO Shiwu.Observability and Controllability Analysis of Sub-/Super-synchronous Components Based on Frequency Domain Oscillation Mode[J].Automation of Electric Power Systems,2023,47(3):30-39.
REN Jianmiao,XIAO Shiwu.Observability and Controllability Analysis of Sub-/Super-synchronous Components Based on Frequency Domain Oscillation Mode[J].Automation of Electric Power Systems,2023,47(3):30-39. DOI: 10.7500/AEPS20211123009.
Observability and Controllability Analysis of Sub-/Super-synchronous Components Based on Frequency Domain Oscillation Mode
When direct-driven wind turbine is connected to a weak AC power grid
it will cause sub-/super-synchronous oscillation of the power system. The amplitude of the generated supersynchronous component is generally different from that of the subsynchronous component
and the specific generation mechanism is not clearly explained. In this paper
based on the oscillation mode of the positive and negative sequence coupling impedance loop in the frequency domain
the observability and controllability of the sub-/super-synchronous components are quantitatively analyzed
and the observability and controllability laws of the sub/super-synchronous components are explained. First
the positive and negative sequence loop coupling impedance equation of the grid connected with frequency-domain direct-driven wind turbine system is established
the relationship between the sub-/super-synchronous component
the positive and negative sequence component
and the
dq
component is analyzed
and the cause of the unequal amplitude of the sub-/super-synchronous component is explained. Then
the expression of the degree of observability and controllability of sub-/super-synchronous oscillation mode on positive and negative sequence components and sub-/super-synchronous components is derived from a quantitative perspective
and the analysis of the degree of observability and controllability of sub-/super-synchronous components is realized. Finally
the sensitivity method is used to analyze the parameters that affect the magnitude of sub-/super-synchronization components
and the simulation results are verified against the theoretical analysis results.
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