Damping Characteristics Improvement of a Wind-PV-thermal-bundled Power Systems by Coordinating Optimization of Controller Parameters

Research on improving low-frequency oscillation characteristics of wind power grid-connected power system with doubly-fed wind generator based on virtual impedance power system stabilizer

“…Combining Eqs. ( 4) and (5), the derivative of the potential after the transient reactance can be obtained as Eq. (6).…”

“…Numerous scholars now acknowledge that as the size of the power grid expands, its ability to dampen oscillations weakens. As a result, the growing number of DFIGs connected to the grid necessitates enhancing the damping capabilities of the system and effectively suppressing low-frequency oscillations [2][3][4][5].…”

Archives of Electrical Engineering

“…Various control techniques have been used to increase the damping ratio to suppress the LFO for power systems, such as power system stabilizers (PSSs) [3][4][5][6], flexible AC transmission systems (FACTSs) [7][8][9], and the additional damping control of HVDC [10,11]. The high controllability and fast response characteristics of HVDC can be used to damp LFO by adding supplementary control on the basis of original control, which was noted in [12][13][14][15][16][17][18][19][20][21][22].…”

“…6 𝑠 5 + 2.53×10 6 𝑠 4 + 5.09×10 7 𝑠 3 + + 2.75×10 8 𝑠 2 + 2.68×10 8 𝑠 + 6.62𝑠 𝑠 8 + 212.85𝑠 7 + 1.27×10 4 𝑠 6 + 1.50×10 5 𝑠 5 + + 1.16×10 6 𝑠 4 + 4.09×10 6 𝑠 3 + 9.44×10 6 𝑠 2 + 7.08×10 6 𝑠 + 1.66×10 6 .…”