Dynamic Aggregation of Generating Unit Models

Improved low-voltage-ride-through capability of fixed-speed wind turbines using decentralised control of STATCOM with energy storage system

“…The conventional generation, wind generation and the total load in this system are 3760.48, 2432.93 and 6150.5 MW, respectively. We used aggregated wind generator [22] and synchronous generator models [23] for controller design. Two 150 kVA 2-level VSC-based STATCOM/ESS (95 F, 19 kJ) are connected to the system at buses 32 and 34 through shunt coupling transformers at 110 kV to regulate their respective terminal bus voltages at the point of common coupling (PCC).…”

Extensions, simplifications, and tests of synchronic modal equivalencing (SME)

“…The core model can also be obtained directly from (2), which requires less computation than first obtaining (4). A possible advantage of the core model over the standard swing-equation model is that its features may be more easily correlated with the detailed model (2). However, the linearized, undamped swing-equation model can be used instead of the core model in all that follows.…”

A model reduction approach for simulation of long-term voltage and frequency dynamics

“…Several other approaches were developed for aggregation of coherent generators. An approach based on least-square fitting of the transfer functions of coherent generators was proposed in [11]. A trajectory sensitivity method was used in [12] to determine the exciter parameters of the aggregated generators.…”