Effect of Load Variations in DC-DC Converter

Husna, Asiya; Siraj, Siti Fatimah; Mat, M.H.

doi:10.1109/cimsim.2011.78

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…Current-mode control is one of the major control methods that is widely used in the topology of most Buck converters [27,28]. This technique has proven its vibrant performance and undeniable properties such as protection of short circuits [29]. Current-mode control has two major types: peak current-mode control and average current-mode control.…”

Section: Proposed Feedback Pid Control Schemementioning

confidence: 99%

Feedback PID Controller-Based Closed-Loop Fast Charging of Lithium-Ion Batteries Using Constant-Temperature–Constant-Voltage Method

Kaleem¹,

Khalil²,

Aslam³

et al. 2021

Electronics

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Lithium-ion batteries are the most used technology in portable electronic devices. High energy density and high power per mass battery unit make it preferable over other batteries. The existing constant-temperature and constant-voltage charging technique (CT–CV), with a closed loop, lacks a detailed design of control circuits, which can increase charging speed. This article addresses this research gap in a novel way by implementing a simpler feedback proportional integral and differential (PID) control to a closed-loop CT–CV charging circuit. Voltage-mode control (VMC) and average current-mode control (ACM) methods were implemented to maintain the battery voltage, current, and temperature at safe limits. As per simulation results, 23% faster charging is achieved by implementing VMC and almost 50% faster charging is attained by employing the ACM technique in the PID controller. Our proposed control strategy is validated experimentally, which yields up to 25% faster charging of a battery than the reference battery.

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Section: Proposed Feedback Pid Control Schemementioning

confidence: 99%

Feedback PID Controller-Based Closed-Loop Fast Charging of Lithium-Ion Batteries Using Constant-Temperature–Constant-Voltage Method

Kaleem¹,

Khalil²,

Aslam³

et al. 2021

Electronics

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“…The closed-loop voltage gain, G can be derived from Figure 5 using the reduction block method. By setting io to be 0, and the model can be simplified to (7). By setting vi* to 0, the model can be simplified to (8) to find the output impedance of the inverter…”

Section: Generalized Model Of Single-phase Invertermentioning

confidence: 99%

“…Whenever the operation of microgrid shifted to island mode, electric potential, E and frequency,  are considered to be maintained with several inverters working in parallel and sharing the load. These inverters act in regulating the voltage; amplitude and frequency, instead of different mode of operation like other converter [7]; besides providing the required current needed. However, the issue of power quality [8] that contributed by the existence of transient circulating current in line impedance [9] will lead to the system instability, thus can harmful the inverters [10] due to mismatch of the output voltage.…”

mentioning

confidence: 99%

Droop control technique for equal power sharing in islanded microgrid

Husna¹,

Roslan²,

Mat³

2019

IJPEDS

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This paper presents a droop control technique for equal power sharing in islanded microgrid. In this study, the proposed controller is based on the frequency droop method, is applied to a robust droop controller in parallel connected inverters. The previous robust droop controller deals with voltage droop method. A modification has been formed against this controller by adding a fuzzy logic controller with the frequency droop method. The only sharing error which is concentrated in this paper is the error in sharing the rated frequency among the inverters. By adapting fuzzy in the robust droop, it tries to eliminate the frequency error, hence that the frequency reference of the inverters keeps maintain at 50Hz. A derivation of generalized models of a single-phase parallel-connected inverter system is shown. The simulation results show that the proposed controller with FLC is able to improve the stability of frequency reference and the performance of power sharing between the inverters under the inductive line impedance.

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“…A number of works have been devoted to the simulation of DC-DC converters and therefore the simulations are not described in detail here, only the results are given [11][12][13][14][15]. Simulations were performed in SPICE and partly confirmed by Simulink.…”

Section: Introductionmentioning

confidence: 99%

Output Overvoltage in DC- DC Switching Converters in Case of Sudden Unloading

Hammerbauer

Štork

2021

2021 International Conference on Applied Electronics (AE)

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In present time the high efficiency switching DC/DC converters, e.g. buck and boost are often used. This work describes some problems of DC-DC converters, which can occur, when the load is suddenly disconnected or simultaneous disconnection of the load and the capacitor at the output. The results were derived both by simulation but also by measurement. A special measuring system has been developed for these measurements, which enables the realization of fault conditions. Therefore, measurements were performed on 2 different types of DC-DC converters. The results of simulations and measuring are presented in the work. Error conditions usually cause an overvoltage that can damage the equipment connected to the converter. A solution how to prevent overvoltage and thus damage connected systems is also described.

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Effect of Load Variations in DC-DC Converter

Cited by 7 publications

References 7 publications

Feedback PID Controller-Based Closed-Loop Fast Charging of Lithium-Ion Batteries Using Constant-Temperature–Constant-Voltage Method

Feedback PID Controller-Based Closed-Loop Fast Charging of Lithium-Ion Batteries Using Constant-Temperature–Constant-Voltage Method

Droop control technique for equal power sharing in islanded microgrid

Output Overvoltage in DC- DC Switching Converters in Case of Sudden Unloading

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