Order reduction mechanism for large-scale continuous-time systems using substructure preservation with dominant mode

Tiwari, Sharad Kumar; Samant, Piyush; Shinhmar, Madhusudan; Kaur, Gagandeep

doi:10.1007/s12046-020-1296-5

Cited by 3 publications

(4 citation statements)

References 31 publications

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“…In this case, the author checks the closeness step response of four and reduced SEPIC converter. As shown in figure 4 and table 1, the rise time, settling time, maximum overshoot, and peak time of fourth order and reduced order SEPIC converter are approximately similar through Pade's approximation topology compared to other model order reduction topologies [10,25,27,31,35,37].…”

Section: ´´-´´+mentioning

confidence: 74%

“…The basic equation of the current across the load, the voltage and current across the shunt resistance, and the current through the diode is shown in figure 1(b) [28][29][30][31][32][33][34][35][36][37][38] and is derived from the single diode equivalent circuit of the solar PV array.…”

Section: Solar Pv Arraymentioning

confidence: 99%

“…The time domain analysis of the fourth-order system concerning reduced-order system response has been analyzed. The impact of I L1 input current with V C2 output capacitor voltage in reduced order is generalized as a negligible effect of I L2 output inductor current and V C1 coupling capacitor voltage [10,[35][36][37][38][39][40].…”

Section: ´´-´´+mentioning

confidence: 99%

“…On the other hand, system performance becomes sluggish due to the movement of poles toward RHP. It depends upon dynamic resistance of less than 1.4 Ω for nullifying the impact of nonlinearities [29][30][31][32][33][34][35][36].…”

Section: Closed Loop Control Of Pv-sepic Ga-based Controllermentioning

confidence: 99%

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Optimized virtual impedance solar restoration droop emulated SEPIC controller under low irradiation

Yadav,

Singh

2024

Eng. Res. Express

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This paper is focused on PV-based reduced order pade’s approximation SEPIC virtual impedance, restoration controller with parallel impedance emulation condition. However, the complexity of the higher-order SEPIC controller has been reduced and compared by Pade’s approximation with different reduction techniques. It covers the time response, oscillation, overshoot, dynamic performance and stability of the controller. The computational time and need of the sensor are less and occur better response compared to the other reduction technique under the solar irradiance variation. However, in PV, the dynamic resistance is generalized by nonlinear solar I-V curve dependent on the operating point as irradiance, temperature and its I-V curve. The non-linearity effect affectsthe stability of the system. TheSEPIC outer voltage and inner current controller with virtual impedance controller is used to enhance the stability, and comparative response demonstrated through the bode plot. A virtual impedance controller (VIC) cascaded with voltage restoration is used to minimize the voltage notching and oscillations under variation of inertia coefficients. The transient and dynamic performance of reduced order using a genetic algorithm controller has been used to demonstrate and discuss the PV-SEPIC system's stability.

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