Small-Signal Angular Stability of a Power System Affected by Strong Dynamic Interactions Introduced from a Grid-Connected VSWG
Small-signal angular stability of a power system may be affected considerably by a grid-connected VSWG under the condition of open-loop modal resonance. This chapter introduces the concept of open-loop modal resonance. Why strong dynamic interactions may be induced by the grid-connected VSWG when the open-loop modal resonance happens is examined. Analysis is presented to indicate that the open-loop modal resonance may very likely degrade the small-signal angular stability of the power system. Both the grid-connected PMSG and DFIG are studied.
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