Impact of variable negative solar resistance: modified virtual feed forwarded with feedback emulated inertia controller

Yadav, Mukhraj; Singh, Navdeep

doi:10.1080/01430750.2022.2029561

Cited by 5 publications

(15 citation statements)

References 28 publications

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“…Internal factors like temperature change and irradiance have a complete bearing on it [28][29][30][31][32]. In these systems, dynamic resistance regulates a higher-order controller through undampened natural frequency [30][31][32][33][34].…”

Section: Need and Solution Of Virtual Impedance Controller (Vic)mentioning

confidence: 99%

“…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%

“…It should be close to approximate crossover frequency for solar resistance effect taken as zero. The controller's equivalent Impedance to the solar system is seen [29,33,34].…”

Section: Reduced Order Parallel Impedance Emulation-based Voltage And...mentioning

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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Section: Need and Solution Of Virtual Impedance Controller (Vic)mentioning

confidence: 99%

Section: Solar Pv Arraymentioning

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 controller enhances the stability of DC systems using CPLs, linear or nonlinear feedback control methods have been used. Both nonlinear and linear approaches for stabilizing the system using CPL were intended in [19][20]. The feedforward controller is used to remove the output current disturbance of the PV system, expresses as (27),…”

Section: Current Feedforward Controllermentioning

confidence: 99%

“…Directly linking DC components simplifies the integration of renewable energy sources and reduces power conversion losses [19]. DC MGs are being used in a range of applications, including more electric aircraft, naval ships, and data centres [20]. Many loads' transient actions in power outputs can be ignored with advanced power electronic devices, and these loads can be modelled as CPLs [21].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Stability on Dc Microgrid Using Dual Seires Virtual Impedance Based Fuzzy Controller Under Variation of Constant Power Load

Yadav¹,

Singh

2023

Preprint

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This paper investigates the stability issue in direct current microgrid (DC MGs) due to linear and nonlinear constant power load (CPL). The deterioration can be damped out by inserting virtual resistances to minimize the impact of negative resistance of the CPL. However, large virtual resistances caused low stability region. This paper proposed a dual series virtual impedance with fuzzy logic-based voltage and current feed-forward controller. The dual series virtual impedance and a fuzzy logic (FL) are used for improvement of transient behaviour and steady-state error. However, the crossover frequency increased by inserting of CPL is minimized but, not much improved by virtual impedance controller. A fuzzy logic-based voltage and current feedforward controller moves from instable to stable region. With FL based current feedforward controller, the crossover frequency has been minimized from to 454 rad/sec to 23.8 rad/sec for 5 kW load. The feedforward current can not only improve the transient response but also mitigate the crossover frequency for small-signal modelling stability of microgrids. The comparative stability and transient performance have been demonstrated for variation of CPL (5–9 kW) and source. Different scenario variations of loads and source has been validated through simulated for power management by bidirectional converter.

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Improvement of stability on dc microgrid using dual series virtual impedance based fuzzy controller under variation of constant power load

Yadav,

Singh

2024

Microsyst Technol

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Impact of variable negative solar resistance: modified virtual feed forwarded with feedback emulated inertia controller

Cited by 5 publications

References 28 publications

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

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

Enhancement of Stability on Dc Microgrid Using Dual Seires Virtual Impedance Based Fuzzy Controller Under Variation of Constant Power Load

Improvement of stability on dc microgrid using dual series virtual impedance based fuzzy controller under variation of constant power load

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