Control of a Bidirectional Cûk Converter Providing Charge/Discharge of a Battery Array Integrated in DC Buses of Microgrids

López-Santos, Oswaldo; Zambrano-Prada, David A.; Aldana-Rodríguez, Yeison Alejandro; Esquivel-Cabeza, Harold A.; García, Germain; Martínez-Salamero, L.

doi:10.1007/978-3-319-66963-2_44

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…In Equation ( 20) the voltage V C (s) must be considered as a disturbance; then, assuming its value as zero, the DC bus voltage is obtained for a maximum-current transfer function. Then, the output voltage can be indirectly regulated by configuring a nested loop architecture in which the outer controller regulating the output voltage gives the reference of the inner current loop [21,22]. By defining the PI controller transfer function in the classical way, we have:…”

Section: Discharging Mode Of the Capacitormentioning

confidence: 99%

“…The output of the outer loop defines whether the maximum value of the current is the I max value configured by the user or zero, deactivating the inner loop. In the case of the discharge control, also a nested loop is used, in which the PI controller defined in Equation (21) gives the reference for the current controller in order to regulate the input voltage of the critical load. Details of the circuit implementation are given in the results section.…”

Section: Complete Control Diagrammentioning

confidence: 99%

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Control of the Bidirectional Buck-Boost Converter Operating in Boundary Conduction Mode to Provide Hold-Up Time Extension

López-Santos

Urrego-Aponte²,

Tilaguy-Lezama

et al. 2018

Energies

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A hold-up time extension circuit (HTEC) is used to charge and discharge an auxiliary capacitor. This capacitor stores the energy required to extend the operation time of critical loads experiencing short duration failures (SDF) at the DC bus to which they are connected. This paper presents complete modeling and a control-wise approach to a parallel HTEC based on the bidirectional buck-boost converter, which operates in Boundary Conduction Mode (BCM) with a variable switching frequency. The circuit permanently regulates the voltage of the auxiliary capacitor as well as the voltage of the DC bus during SDF, which is uncommon in industrial versions of HTEC. Enforcing the operation in BCM allows a reduction in the size of the inductor in the converter without requiring additional control circuitry. The entire behavior of the proposed HTEC, in all its operation modes, was analyzed theoretically and validated using simulation and experimental results, showing the potential of the circuit to be used in real applications.

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Section: Discharging Mode Of the Capacitormentioning

confidence: 99%

Section: Complete Control Diagrammentioning

confidence: 99%

Control of the Bidirectional Buck-Boost Converter Operating in Boundary Conduction Mode to Provide Hold-Up Time Extension

López-Santos

Urrego-Aponte²,

Tilaguy-Lezama

et al. 2018

Energies

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“…The effort is primarily focused on providing a constant power supply to the BLDC for the hired during periods of low solar irradiation. This can be attained by utilizing an alternative source of energy like a battery through a bi-directional converter [17]. The battery which collects and stored itself by charging through regulated dc supply from the converter and supplying the electric energy by discharging itself to the load under required operating condition.…”

Section: Introductionmentioning

confidence: 99%

Improving Performance of Solar Array Fed BLDC Drive Using Firefly Algorithm Based High Gain Converter

Valantina Stephen, Vinod, Ramprasad Reddy

2024

jes

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The improved transient response of PID controller for improved Luo converter supplied Brushless DC (BLDC) motor using solar energy source is extensively investigated. The BLDC drive uses a hybrid PV system and battery-based power generation as a power source to assure continuous power supply to pump water regardless of solar insolation. The PV system serves as the main energy source, and the battery providing as a backup source that discharged its power only during inclement weather or at night if the photovoltaic panel is insufficient to operate the centrifugal pump. The solar panel feeds power into the battery, whenever water to the field is not required, thus there is no need for an extra power source to charge the batteries. The high output voltage gain DC-DC converter does not make any discomfit to the system performance in regards to irradiance variation, switching loss, or power loss by converter or motor side respectively. Moreover, current sensor, voltage sensor, and control circuits are completed excluded which enhance performance and the cost of the system get reduced effectively. A bidirectional charging control allows a bi-directional converter to alter the battery operation mode automatically. The overall system performance is validated using simulation and experimental setup.

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“…Another group of controllers corresponds to techniques operating with a variable switching frequency, such as sliding mode control (SMC) and model predictive control (MPC). Hysteresis-based sliding mode controllers can differ depending on the state variables (currents or voltages or both) involved in the sliding surface [30][31][32][33][34]. This control is usually implemented analogically by means of comparators and operational amplifiers, which has several advantages with respect to a possible digital implementation.…”

Section: Introductionmentioning

confidence: 99%

A Unified Multimode Control of a DC–DC Interlinking Converter Integrated into a Hybrid Microgrid

et al. 2019

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DC–DC interlinking converters (ILCs) allow bidirectional energy exchange between DC buses of different voltage levels in microgrids. This paper introduces a multimode control approach of a half-bridge DC–DC converter interlinking an extra-low-voltage DC (ELVDC) bus of 48 VDC and a low-voltage DC (LVDC) bus of 240 VDC within a hybrid microgrid. By using the proposed control, the converter can transfer power between the buses when the other converters regulate them, or it can ensure the voltage regulation of one of the buses, this originating from its three operation modes. The proposed control scheme is very simple and provides a uniform system response despite the dependence of the converter dynamic on the operating point and the selected mode. Simulation and experimental results validated the theoretical development and demonstrated the usefulness of the proposed scheme.

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Control of a Bidirectional Cûk Converter Providing Charge/Discharge of a Battery Array Integrated in DC Buses of Microgrids

Cited by 6 publications

References 13 publications

Control of the Bidirectional Buck-Boost Converter Operating in Boundary Conduction Mode to Provide Hold-Up Time Extension

Control of the Bidirectional Buck-Boost Converter Operating in Boundary Conduction Mode to Provide Hold-Up Time Extension

Improving Performance of Solar Array Fed BLDC Drive Using Firefly Algorithm Based High Gain Converter

A Unified Multimode Control of a DC–DC Interlinking Converter Integrated into a Hybrid Microgrid

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