Integrated control of a stand-alone photovoltaic system based on decentralized DC-DC converters

Candido, Diogo Brum; Michels, Leandro; Hey, H.L.

doi:10.1109/isie.2010.5637580

Cited by 5 publications

(9 citation statements)

References 12 publications

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“…The BB SOC is compared with the two thresholds: minimum (SOC min ), and maximum (SOC max ), and determined directly from the BB voltage. The dc bus voltage is compared with the nominal voltage DCBVR reference

v_{dc}^{*}

, as well as with discrete high ( v h 1 , v h 2 , …) and low ( v l 1 , v l 2 , …) voltage comparison values, where

\dots < v_{l 3} < v_{l 2} < v_{l 1} < v_{dc}^{*} < v_{h 1} < v_{h 2} < v_{h 3} < \dots

The state machine proposed in [27] would have 10 operation modes (states), 11 input transition events, and 26 output transition events if applied to the system of Fig. 1.…”

Section: Power Management Of a Stand‐alone Pv System With Centralismentioning

confidence: 99%

“…Here, a simple method based on dc bus voltage levels using integer price values (…, $ − 1, $0, $1, $2, …) is proposed. Discrete dc bus voltage comparison values were adopted as in [26, 27], but without using complex state machines. The variable v level is an index generated by comparing the sampled dc bus voltage with the dc bus voltage levels limits (comparison values):

v_{level} (][, n) = ({, \begin{matrix} 1em4pt \\ ⋮ & ⋮ \\ 2, & v_{h 2} \leq v_{dc} (][, n) < v_{h 3} \\ 1, & v_{h 1} \leq v_{dc} (][, n) < v_{h 2} \\ 0, & v_{l 1} \leq v_{dc} (][, n) < v_{h 1} \\ - 1, & v_{l 2} \leq v_{dc} (][, n) < v_{l 1} \\ ⋮ & ⋮ \end{matrix})

where n is the sample in the price definition.…”

Section: Proposed Algorithmmentioning

confidence: 99%

“…If the same power management system were implemented with a Moore state machine, it would have a total of 18 states for a system with PV, BB, and load, as shown in Table 4. It is important to highlight that the systems of [26, 27] are not Moore state machines, but are also complex. The proposed technique divides this state machine into only a price formation equation and three price comparison tables.…”

Section: Advantages Of the Proposed Approach For Software Implementmentioning

confidence: 99%

“…These strategies can be classified into three groups: centralised, distributed, and hybrid [4]. In the centralised strategy [10, 11, 17–27], signals from power converters are sent to a centralised controller, which usually acts as a supervisor that prioritises and manages all elements. These management systems are usually based on complex state machines, and adding new sources, energy storages or loads with different priorities may increase the algorithm complexity, which can demand high programming effort.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Price‐based power management of off‐grid photovoltaic systems with centralised dc bus

Bellinaso

Schwertner

Michels

2016

IET Renewable Power Generation

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Power management of stand‐alone photovoltaic (PV) systems with centralised dc bus is usually performed using centralised algorithms based on complex state machines. This study proposes an intuitive and modular solution using a price‐based approach. The dc bus is considered a market environment where a fictitious energy price is defined according to energy scarcity. The converters that connect the PV generator, loads, and energy storages to the dc bus choose their operation modes in response to the price. The proposed approach was applied to a stand‐alone PV system with energy storage. Advantages of the proposed technique are scalability and intuitive programming effort due to the market analogy, so it may be helpful to developers of off‐grid PV systems. Experimental results have been carried out to validate the proposed approach, proved effective to manage this system.

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v_{dc}^{*}

, as well as with discrete high ( v h 1 , v h 2 , …) and low ( v l 1 , v l 2 , …) voltage comparison values, where

\dots < v_{l 3} < v_{l 2} < v_{l 1} < v_{dc}^{*} < v_{h 1} < v_{h 2} < v_{h 3} < \dots

The state machine proposed in [27] would have 10 operation modes (states), 11 input transition events, and 26 output transition events if applied to the system of Fig. 1.…”

Section: Power Management Of a Stand‐alone Pv System With Centralismentioning

confidence: 99%

v_{level} (][, n) = ({, \begin{matrix} 1em4pt \\ ⋮ & ⋮ \\ 2, & v_{h 2} \leq v_{dc} (][, n) < v_{h 3} \\ 1, & v_{h 1} \leq v_{dc} (][, n) < v_{h 2} \\ 0, & v_{l 1} \leq v_{dc} (][, n) < v_{h 1} \\ - 1, & v_{l 2} \leq v_{dc} (][, n) < v_{l 1} \\ ⋮ & ⋮ \end{matrix})

where n is the sample in the price definition.…”

Section: Proposed Algorithmmentioning

confidence: 99%

Section: Advantages Of the Proposed Approach For Software Implementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Price‐based power management of off‐grid photovoltaic systems with centralised dc bus

Bellinaso

Schwertner

Michels

2016

IET Renewable Power Generation

Self Cite

View full text Add to dashboard Cite

show abstract

“…Boost converters are used in several important applications, such as power factor correction devices, telecommunication systems, electric motor drivers and, more recently, in renewable energy sources . One problem of interest concerning the boost converter is to keep stability and good regulation of the output voltage for operation under large load variation .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Linear Quadratic Controllers with Stability Analysis for DC‐DC Boost Converters Under Large Load Range

Dupont¹,

Montagner²,

Pinheiro³

et al. 2012

Asian Journal of Control

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This paper presents four different control design strategies for linear quadratic regulators applied to DC-DC boost converters operating under large load range, pointing out advantages and drawbacks by means of a performance comparison. Two of the strategies are based on single controllers and the other two use a set of local controllers to cope with the entire load range. The robust stability of the closed-loop linearized system with the four control strategies is investigated via the existence of a common Lyapunov function, obtained in a fast and efficient way by the solution of linear matrix inequality conditions.

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PV Constant Voltage Control Strategy Based on Super-Twisting Sliding Mode Control

Gao,

Teng,

Wang

et al. 2023

2023 China Automation Congress (CAC)

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Integrated control of a stand-alone photovoltaic system based on decentralized DC-DC converters

Cited by 5 publications

References 12 publications

Price‐based power management of off‐grid photovoltaic systems with centralised dc bus

Price‐based power management of off‐grid photovoltaic systems with centralised dc bus

Comparison of Linear Quadratic Controllers with Stability Analysis for DC‐DC Boost Converters Under Large Load Range

PV Constant Voltage Control Strategy Based on Super-Twisting Sliding Mode Control

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