Dual-Loop Digital Control of a Three-Phase Power Supply Unit With Reduced Sensor Count

Tolani, Sanjay; Joshi, Sridhar; Sensarma, Parthasarathi

doi:10.1109/tia.2017.2761832

Cited by 10 publications

(8 citation statements)

References 28 publications

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“…We constructed a loop circuit network for the fault traveling waves’ simulation analysis in power relays on the MATLAB simulation platform. The loop circuit comprised three power supplies and four distributed parameter transmission lines; the three-phase power supply was adopted in the power supply model [ 29 , 30 ]. Table 1 lists the three power supplies’ parameter settings.…”

Section: Methodsmentioning

confidence: 99%

A security technology of power relay using edge computing

2021

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The purposes are to find the techniques suitable for the safety relay protection of intelligent substations and discuss the applicability of edge computing in relay protection. Regarding relay protection in intelligent substations, edge computing and optimized simulated annealing algorithm (OSAA) are combined innovatively to form an edge computing strategy. On this basis, an edge computing model is proposed based on relay fault traveling waves. Under different computing shunt tasks, OSAA can converge after about 1,100 iterations, and its computing time is relatively short. As the global optimal time delay reaches 0.5295, the corresponding computing time is 456.27s, apparently better than the linear search method. The proposed model can reduce the computing time significantly, playing an active role in the safe shunting of power relays. The simulation also finds that the voltage and current waveforms corresponding to the fault state of Phase A are consistent with the actual situations. To sum up, this model provides a reference for improving and optimizing intelligent substation relay protection.

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Section: Methodsmentioning

confidence: 99%

A security technology of power relay using edge computing

2021

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“…Finally, (22) and (25) are used in (26) to obtain (27), which represents the IBVM efficiency in terms of the parasitic losses. Also, it is important to highlight that this model does not include the switching losses.…”

Section: Efficiency Analysismentioning

confidence: 99%

“…To plot the efficiency as a function of the losses and output power, P o in (28) is rewritten as a function of V in 2 , which is assumed as the FC voltage at maximum power, in this case, 28.8 V as presented in Table 3. Assuming the same simplifications to obtain (22) and (25), the output power results in (29)…”

Section: Efficiency Analysismentioning

confidence: 99%

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Evaluation of an interleaved boost converter powered by fuel cells and connected to the grid via voltage source inverter

Fuzato

Aguiar

Bastos

et al. 2018

IET Power Electronics

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The connection of distributed generation systems powered by fuel cells (FCs) to the grid requires power electronics devices with high voltage gain, high capability of power processing and high levels of current absorbed from the direct current (dc) source. In this context, the authors propose the use of an interleaved boost with voltage multiplier (IBVM) converter connected to a FC and a voltage source inverter (VSI) to form a micro grid. To manage the power delivered by the FC in gridconnected operation, they propose two different control structures, mode 1 (FC cascade control) and mode 2 (controlling FC operating point). In mode 1, the dc-link voltage is adjusted by the dc/dc converter, while the injected current is controlled by the VSI. On the other hand, in mode 2, the VSI is responsible to keep the dc-link stable, while the dc/dc converter controls the current injected into the grid by means of the FC current reference. Since the VSI control structure has been exhaustively investigated in the literature, in this study, they evaluate the impact of the proposed control structures in the dc-side and also the IBVM efficiency. Finally, they conclude the study outlining the main points discussed.

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“…In order to regulate the ac voltage, power converters commonly use a double-loop [8]- [17] or a single-loop controller [18]- [23]. On the one hand, double-loop structures provide a stable system using simple (low-order) proportionalintegral (PI) or proportional-resonant (PR) controllers because they divide a complex plant model into two parts.…”

Section: Introductionmentioning

confidence: 99%

AC-Voltage Harmonic Control for Stand-Alone and Weak-Grid-Tied Converter

Pérez-Estévez

Doval-Gandoy

Guerrero

2020

IEEE Trans. on Ind. Applicat.

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This paper presents an ac voltage controller that can operate under a wide range of loads thanks to its high robustness to plant model variations. A robust voltage controller is required in a droop-controlled inverter that operates connected to a grid or in island mode with other generators. In such modes of operation, the voltage source converter (VSC) can experience large load impedance variations depending on the number of parallel generators or the grid impedance value. Concerning the controller performance, the transient response is improved by selectively minimizing the output impedance of the system at the frequencies that typically contain the largest components of the output current. Complete harmonic control is achieved due to its zero output impedance at a set of designselected frequencies. The proposed controller only measures the output voltage, and it contains a single-loop structure that uses all available bandwidth. In addition, a fast converter-current estimator provides protection against a fault and inrush output currents. The design process only requires, as input parameters, the LC filter values, the sampling frequency, and a set of harmonics where load-current circulation is expected.

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Dual-Loop Digital Control of a Three-Phase Power Supply Unit With Reduced Sensor Count

Cited by 10 publications

References 28 publications

A security technology of power relay using edge computing

A security technology of power relay using edge computing

Evaluation of an interleaved boost converter powered by fuel cells and connected to the grid via voltage source inverter

AC-Voltage Harmonic Control for Stand-Alone and Weak-Grid-Tied Converter

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