Robust optimisation framework for SCED problem in mixed AC‐HVDC power systems with wind uncertainty

Filabadi, Milad Dehghani; Azad, Sahar Pirooz

doi:10.1049/iet-rpg.2019.1127

Cited by 10 publications

(2 citation statements)

References 35 publications

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“…The state and the algebraic variables are solved (9), where  denotes their trajectories during time-domain simulation. ( ) ( , )…”

Section: B Analytical Expression Of Trajectory Sensitivitymentioning

confidence: 99%

“…With the merit of large-capacity, long-distance transmission, the high-voltage DC (HVDC) is popular in recent years [1], [2], [3], which changes the power flow and the output of the synchronous generator (SG), and may be applied to suppress angular oscillation of the SGs in AC/UHVDC systems [4], [5], [6]. The existing research focuses on the optimal power distribution of the AC/HVDC [7], [8], [9] and the emergency support from the HVDC power [10], [11], [12],…”

Section: Introductionmentioning

confidence: 99%

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Suppression of Power Angle Oscillation Among Synchronous Generators by Optimizing Steady–State Power of High-Voltage DC

Cao,

Xia,

Tao

et al. 2023

IEEE Access

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In the power systems with high-voltage DC (HVDC) transmission, the angular oscillations among the synchronous generators (SGs) endanger the system security. The pre-fault power of the HVDC changes the power flow and affects the system dynamics, hence may be optimized to improve the system stability. However, the HVDC power does not appear in the system matrix, thus it is difficult to derive the analytical expression of the trajectory sensitivity (TS) for parameter optimization. Based on the power flow equations, the initial value of the TS is newly introduced in the sensitivities of the power angles of the SGs with respect to the intermediate variables and then to the DC powers. The imbalanced matrix of the TS is derived during the time-domain simulation. By setting the objective function as the integral of the square of the relative value of the SGs' power angle deviation with time, and summing the trajectory sensitivity for all time steps, the gradient information of the objective function to the DC powers is newly derived. The optimization model is solved with the interior point method to adjust the steady-state HVDC powers. The effect of the power optimization on the angular oscillation is verified with the time-domain simulation. The numerical results show that the objective function is reduced by 37.92%, and the oscillation amplitude is reduced by 35%.

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“…The state and the algebraic variables are solved (9), where  denotes their trajectories during time-domain simulation. ( ) ( , )…”

Section: B Analytical Expression Of Trajectory Sensitivitymentioning

confidence: 99%