Dynamic characteristics of inverter-based resources in bulk power systems - Sub- and super-synchronous control interactions
Dynamic characteristics of inverter-based resources in bulk power systems - Sub- and super-synchronous control interactions
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1 Scope Based on the interaction phenomenon and frequency range, this part of IEC 63401, which is a technical report, covers the "control interactions" in converter interfaced generators e.g, wind and PV with the frequency of the resulting oscillation below twice the system frequency. SSCI can be categorized into:
SSCI in DFIG is caused by the interaction between DFIG wind turbine converter controls and the series compensated network.
SSCI involving FSC (both type-4 wind turbine or PV generators) is caused by the interaction between wind turbine or solar PV's FSC controls and weak AC grid.
Figure 1 — Multi-frequency oscillations in the modern power system with high-share of renewables and power electronic converters
This technical report is organized into nine clauses. Clause 1 gives a brief introduction and highlights the scope of this document. Clause 4 presents the historical background of various types of subsynchronous oscillation (SSO) and revisits the terminologies, definitions, and classification in the context of classical SSR and emerging SSCI issues to better understand and classify the emerging interaction phenomena. Clause 5 provides the description, mechanism, and...
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