Frequency‐adaptive complex‐coefficient filter‐based control for grid‐integrated PV system

Pandey, S. K.; Singh, Bhim; Modi, Gaurav

doi:10.1049/iet-gtd.2019.1820

Cited by 8 publications

(7 citation statements)

References 24 publications

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“…The PV plant is operating at unity power factor, with its governing equations presented in the Appendix of this paper. In this study, the common incremental conductance (InC) maximum power point tracking algorithm [26] has been implemented for the PV inverter in order to obtain the dc‐link voltage reference set‐point. This method has advantage over the perturb and observe (P&O) algorithm that can show poor MPP tracking under extreme perturbations in irradiance.…”

Section: Test Studies Results and Discussionmentioning

confidence: 99%

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

Arzani

Venayagamoorthy

2021

IET Generation Trans & Dist

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PV plant power excursions can have adverse implications on grid frequency. This phenomenon is observable due to inherently uncertain cloud transients across a local PV plant. Hence, provision of decision-based controllers for centralized power inverters becomes imperative for supporting local grid operations. Such controllers can be improved to better counteract minutes-based PV power deviations from its stable equilibrium. Thus, grid frequency deviations require further investigation at PV plant point of interconnection to the grid. In this research, single and spatially distributed utility-scale PV plants operation is studied on a real-time power system simulator, under fast-changing meteorological conditions at different PV site loading levels (P PV −re f). Software-in-the-loop Monte Carlo simulation is conducted and an empirical approach is proposed for characterizing minutes-based variations in grid frequency originating from PV plant operation, that is, power fluctuations at different P PV −re f. The power−frequency curve obtained at the PV site can be incorporated in form of an empirical frequency droop function in characteristics curve of adjacent auxiliary power source(s). A prominent feature of this adaptive frequency droop is that it considers PV site loading levels during different hours, giving it leverage over common practice constant droop(s). A hardware-in-the-loop platform is presented allowing field derivation of adaptive frequency droop curves using hardware PMU time-series data analytics.

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Section: Test Studies Results and Discussionmentioning

confidence: 99%

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

Arzani

Venayagamoorthy

2021

IET Generation Trans & Dist

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“…Our focus in this section is to extend the self-tuning filter (9) for the unbalanced grid in the 𝛼𝛽 coordinate (5). To facilitate this, let us assume that the states are…”

Section: Proposed Extended Self-tuning Filtermentioning

confidence: 99%

“…Grid-interfacing converters (GIC) [1][2][3][4][5][6][7][8][9][10][11][12][13] are almost ubiquitous in today's modern power system. GICs are used to integrate distributed energy sources, generate DC voltage through active rectification of the grid voltage, improve the power quality through active power filtering, maintain constant voltage at the sensitive load, emulate the grid voltage for power converter testing etc.…”

Section: Introductionmentioning

confidence: 99%

A Quasi open‐loop robust three‐phase grid‐synchronization technique for non‐ideal grid

Ahmed

Biricik

Benbouzid

2021

IET Generation Trans & Dist

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Development of advanced grid-synchronization technique for unbalanced and distorted grid is considered in this paper. In this context, self-tuning filter (STF) is considered to extract the fundamental component from the measured unbalanced and distorted voltages. Standard STF considers balanced grid voltages which is not always possible to ensure in the actual power grid. To mitigate this issue, an extended STF is proposed by analyzing the standard STF in the state-space framework. To make the proposed ESTF grid-following, a robust open-loop frequency estimator is also applied. The closed-loop system enjoys excellent filtering benefit from the extended STF side while taking advantage of the fast convergence speed property of the open-loop frequency estimation technique. Numerical simulation and experimental results with double second-order generalized integrator phase-locked loop are provided to validate the theoretical developments.

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“…In Ref. 37, it is suggested to regulate a grid integrated PV system using a CCF model. However, CCF is only used to trace the active load component, and a bandpass filter is employed to filter the grid voltage, which will not be effective for all adverse grid conditions.…”

Section: Introductionmentioning

confidence: 99%

An unprecedented control of 3‐phase grid tied solar photovoltaic‐hydrogen/bromine‐supercapacitor composite storage microgrid for pulse power load regulation under nonideal grid conditions

Behera

Saikia

2023

Int J Numerical Modelling

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Photovoltaic (PV) power penetration into the distribution grid has increased. PV power fluctuations, abrupt load changes, nonlinear loading, growing usage of portable electronic devices, electric cars low average power and comparatively high pulse power needs, and other factors translate into severe grid instability. As a result, in these circumstances, power exchange between PV and the utility grid becomes a difficult task. Therefore, this article proposes a hydrogen/bromine (H2/Br2) redox flow battery and supercapacitor composite energy storage for a three phase grid tied PV system with multifunctional active power filter support to ensure grid codes. Further, the system is equipped with an unprecedented control technique that encompasses: an adaptive frequency tuned complex coefficient filter‐phase locked loop that provides grid frequency and phase angle information under adverse grid conditions, a modified sparrow search algorithm tuned tilt integral derivative with filter plus double integral controllers are employed to regulate the control errors under various system dynamic and disturbance conditions, fractional order incremental conductance maximum power point tracking is incorporated to efficiently track the PV peak power irrespective of atmospheric variations, a holistic fast‐acting power based energy management control employed for efficient regulation of load power and smooth out the PV power variation, and PV feedforward control dynamics to enhances system dynamics by reducing oscillations under various atmospheric conditions. The aim is to attain a smooth power transition with the grid at the unit power factor under normal and nonideal grid conditions. With reactive power injection, the control also maintains the voltage profile. During all these operations, no trade‐off occurs with the system power quality. Matlab simulations and the real time simulation test bench results under unfavorable grid circumstances demonstrate the effectiveness of the proposed method, and system harmonics are well within bounds in all the scenarios undertaken.

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Frequency‐adaptive complex‐coefficient filter‐based control for grid‐integrated PV system

Cited by 8 publications

References 24 publications

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

An empirical approach to frequency droop characterization from utility‐scale photovoltaic plants operation in a power system

A Quasi open‐loop robust three‐phase grid‐synchronization technique for non‐ideal grid

An unprecedented control of 3‐phase grid tied solar photovoltaic‐hydrogen/bromine‐supercapacitor composite storage microgrid for pulse power load regulation under nonideal grid conditions

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