An Estimator of Solar Irradiance in Photovoltaic Arrays With Guaranteed Stability Properties

Carrasco, Miguel; Mancilla–David, Fernando; Ortega, Roméo

doi:10.1109/tie.2013.2281154

Cited by 31 publications

(40 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To assess the performance of the proposed estimators, realistic simulations were done for a PV system considered in other studies, whose parameters are I i r r , r e f =2.4207, I 0, r e f =1.996×10 −8 , R S , r e f =1.526×10 −2 , R P , r e f =6.4616, n r e f =1.1287, N S =1440, N P =400,

α_{T}^{'} = 0.01

.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The relation between these parameters, the reference temperature and irradiance, and the vector a of the IV characteristic is()

a_{1} = N_{P} I_{i r r, r e f} ((), \frac{G}{G_{r e f}}) false(1 + α_{T}^{'} false(T - T_{r e f} false) false),

a_{2} = N_{P} I_{0, r e f} {((), \frac{T}{T r e f})}^{3} e x p ((), \frac{E_{g, r e f} q}{k T_{r e f}} - \frac{E_{g} q}{k T}),

a_{3} = \frac{q}{N_{S} n_{r e f} k T}, a_{4} = R_{S, r e f} \frac{N_{S}}{N_{P}}, a_{5} = \frac{N_{P}}{N_{S} R_{P, r e f}} ((), \frac{G_{r e f}}{G}),

where

\begin{matrix} E_{g} & = E_{g} false(T false) = 1.16 - 4.73 \times 1 0^{- 4} \times \frac{T}{T + 636} false(e V false), \\ E_{g, r e f} & = E_{g} false(T_{r e f} false) . \end{matrix}

For the reference temperature T =308.82 K and irradiance G =967.71 W / m 2 thes...…”

Section: Simulation Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Identification of photovoltaic arrays' maximum power extraction point via dynamic regressor extension and mixing

Pyrkin

Mancilla–David

Ortega

et al. 2017

Adaptive Control & Signal

Self Cite

View full text Add to dashboard Cite

This paper deals with the problem of identification of photovoltaic arrays' maximum power extraction point-information that is encrypted in the current-voltage characteristic equation. We propose a new parameterisation of the classical five parameter model of this function that, combined with the recently introduced identification technique of dynamic regressor extension and mixing, ensures a fast and accurate estimation of all unknown parameters. A concavity property of the current-voltage characteristic equation is then exploited to directly identify the desired voltage operating point. Realistic numerical examples via computer simulations are presented to assess the performance of the proposed approach.

show abstract

α_{T}^{'} = 0.01

.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The relation between these parameters, the reference temperature and irradiance, and the vector a of the IV characteristic is()

a_{1} = N_{P} I_{i r r, r e f} ((), \frac{G}{G_{r e f}}) false(1 + α_{T}^{'} false(T - T_{r e f} false) false),

a_{2} = N_{P} I_{0, r e f} {((), \frac{T}{T r e f})}^{3} e x p ((), \frac{E_{g, r e f} q}{k T_{r e f}} - \frac{E_{g} q}{k T}),

a_{3} = \frac{q}{N_{S} n_{r e f} k T}, a_{4} = R_{S, r e f} \frac{N_{S}}{N_{P}}, a_{5} = \frac{N_{P}}{N_{S} R_{P, r e f}} ((), \frac{G_{r e f}}{G}),

where

\begin{matrix} E_{g} & = E_{g} false(T false) = 1.16 - 4.73 \times 1 0^{- 4} \times \frac{T}{T + 636} false(e V false), \\ E_{g, r e f} & = E_{g} false(T_{r e f} false) . \end{matrix}

For the reference temperature T =308.82 K and irradiance G =967.71 W / m 2 thes...…”

Section: Simulation Resultsmentioning

confidence: 99%

Identification of photovoltaic arrays' maximum power extraction point via dynamic regressor extension and mixing

Pyrkin

Mancilla–David

Ortega

et al. 2017

Adaptive Control & Signal

Self Cite

View full text Add to dashboard Cite

show abstract

“…The main drawback is that most of existing PV systems are not designed to disconnect and move to short circuit and open circuit conditions. Authors of [9] propose a globally convergent estimator of the irradiance starting from v, i and T measurements, assuming that the plant operates in MPPT mode and without extending the analysis to the power estimation. Finally, in [10] the reverse model approach is proposed to implement MPPT for a single panel by integrating irradiance measurements from a dedicated pyranometer for the identification phase only.…”

Section: State-of-the-artmentioning

confidence: 99%

A model-based filtering strategy to reconstruct the maximum power generation of curtailed photovoltaic installations: Application to forecasting

Scolari

Sossan

Paolone

2017

2017 IEEE Manchester PowerTech

View full text Add to dashboard Cite

Abstract-In this paper, we propose a model-based filtering strategy to reconstruct the maximum power production of a PV power plant thanks to integrating measurements of the PV cell temperature, system DC voltage and DC current. The filter relies on a reversed physical model of the targeted PV system and enables to, first, determine analytically the irradiance incident to the panels, and, second, estimate the DC power production as if the plant was operating in maximum power point tracking (MPPT) mode. We present how the approach can be used to reconstruct the maximum power value starting from a generic operating point. As an application, we show that the proposed strategy can improve time series-based solar power forecasting techniques, in particular when the production of the PV system is curtailed and thus the measured power does not correspond to the maximum available.

show abstract

“…Nevertheless, the converter is well suited for deployment in a PV system. In practice the MPP voltage varies strongly with temperature while the MPP current varies strongly with irradiance [12]. Thus under dynamic irradiance conditions the MPP voltage will change minimally, and the efficiency of the converter will be approximately constant as f s is adjusted for the new MPP.…”

Section: Interfacing the Converter With Pv Panelsmentioning

confidence: 99%

A high step-up transformerless DC/DC converter with flat efficiency

Ranjram

Simeonov

Lehn

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

View full text Add to dashboard Cite

This paper proposes a high step-up, transformerless, dc/dc converter suitable for applications where high efficiency at low power throughput is required. The proposed converter achieves high step-up dc/dc conversion through a resonant LC tank and realizes high-efficiency operation via the softswitching enabled by this resonant network. Flat efficiency is obtained via discontinuous conduction mode (DCM) operation of the converter. A burst operating mode is proposed for achieving increased efficiency operation. Finally, a 100V/800V, 650W prototype is implemented to experimentally validate the converter's operation, and flat efficiencies are measured over a wide operating range.

show abstract

An Estimator of Solar Irradiance in Photovoltaic Arrays With Guaranteed Stability Properties

Cited by 31 publications

References 30 publications

Identification of photovoltaic arrays' maximum power extraction point via dynamic regressor extension and mixing

Identification of photovoltaic arrays' maximum power extraction point via dynamic regressor extension and mixing

A model-based filtering strategy to reconstruct the maximum power generation of curtailed photovoltaic installations: Application to forecasting

A high step-up transformerless DC/DC converter with flat efficiency

Contact Info

Product

Resources

About