A multi-featured single-phase utility interface with reduced DC link capacitor for distributed power sources

In distribution networks with distributed power supplies, distributed power supplies can also be used as backup power sources to support the grid. If a distribution network contains multiple distributed power sources, the distribution network becomes a complex power grid with multiple power supplies. When a short-circuit fault occurs at a certain point on the power distribution network, the size, direction and duration of the short-circuit current are no longer single due to the existence of distributed power, and will vary with the location and capacity of the distributed power supply system. The change, in turn, affects the current in the grid, resulting in the generation and propagation of additional current. This power grid of power electronics will cause problems such as excessive standard mis-operation, abnormal heating of the converter and component burnout, and communication system failure. It is of great and practical significance to study the influence of distributed power in distributed power distribution networks.

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Optimum energy harvesting among distributed power sources with uniform voltage distribution

2012 IEEE Aerospace Conference ◽

10.1109/aero.2012.6187246 ◽

2012 ◽

Cited By ~ 4

Author(s):

K. Siri ◽

M. Willhoff

Keyword(s):

Energy Harvesting ◽

Voltage Distribution ◽

Power Sources ◽

Distributed Power ◽

Optimum Energy

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Single-Phase Inverter Deadbeat Control with One-Carrier-Period Lag

Electronics ◽

10.3390/electronics9010154 ◽

2020 ◽

Vol 9 (1) ◽

pp. 154

Author(s):

Wei Yao ◽

Jiamin Cui ◽

Wenxi Yao

Keyword(s):

Output Voltage ◽

Single Phase ◽

Harmonic Distortion ◽

Voltage Source ◽

Current Loop ◽

Deadbeat Control ◽

Additional Advantage ◽

Power Sources ◽

Pwm Inverter ◽

Single Phase Inverter

This paper presents a novel digital control scheme for the regulation of single-phase voltage source pulse width modulation (PWM) inverters used in AC power sources. The proposed scheme adopts two deadbeat controllers to regulate the inner current loop and the outer voltage loop of the PWM inverter. For the overhead of digital processing, the change of duty of PWM lags one carrier period behind the sampling signal, which is modeled as a first-order lag unit in a discrete domain. Based on this precise modeling, the deadbeat controllers make the inverter get a fast dynamic response, so that the inverter’s output voltage is obtained with a very low total harmonic distortion (THD), even when the load is fluctuating. The parameter sensitivity of the deadbeat control was analyzed, which shows that the proposed deadbeat control system can operate stably when the LC filter’s parameters vary within the range allowed. The experimental results of a 2kW inverter prototype show that the THD of the output voltage is less than 3% under resistive and rectifier loads, which verifies the feasibility of the proposed scheme. An additional advantage of the proposed scheme is that the parameter design of the controller can be fully programmed without the experience of a designer.

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Development of a Proposed Single-Phase Series Active Power Filter without External Power Sources

2019 International Conference on Smart Energy Systems and Technologies (SEST) ◽

10.1109/sest.2019.8849010 ◽

2019 ◽

Cited By ~ 3

Author(s):

Joao L. Torre ◽

Luis A. M. Barros ◽

Joao L. Afonso ◽

J. G. Pinto

Keyword(s):

Single Phase ◽

Active Power Filter ◽

Active Power ◽

Power Sources ◽

Power Filter ◽

External Power

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Self-oscillations at the frequency of subharmonics in nonlinear electric chains and systems

E3S Web of Conferences ◽

10.1051/e3sconf/201913901054 ◽

2019 ◽

Vol 139 ◽

pp. 01054 ◽

Cited By ~ 1

Author(s):

M.I. Ibadullaev ◽

A.N. Tovbaev ◽

A.Zh. Esenbekov

Keyword(s):

Single Phase ◽

Experimental Studies ◽

Power Lines ◽

Equivalent Model ◽

Critical Parameters ◽

Steady State Mode ◽

Power Sources ◽

Electric Circuits ◽

Three Phase ◽

Extensive Class

It is known that the occurrence and existence of autoparametric oscillations (AIC) at the subharmonic frequency (GHC) in power lines (power lines) and in power supply systems is extremely undesirable, since they cause ferroresonant overvoltages at different frequencies. At the same time, there is an extensive class of nonlinear electric circuits in which the excitation of the AIC at the frequency of the SGC forms the basis of frequency-converting devices serving as secondary power sources. It is shown that single-phase-three-phase nonlinear systems are, to one degree or another, equivalent circuits of power lines, the main elements of which are: longitudinal compensation capacitors, transverse compensation reactors, and transformers with non-linear characteristics. The regularities of the excitation of the GCC at the frequency (ω / 3) of the power lines were studied, theoretical and experimental studies of the equivalent model of single-phase-three-phase circuits with nonlinear inductance were carried out. For a theoretical analysis of the steady-state mode of SGK at a frequency (ω / 3) with inductive coupling, the frequency- energy approach is used. The conditions of existence and critical parameters of the circuit are determined, and the mechanism of the appearance of the SGC at the frequency (ω / 3) is also studied.

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Maximum Power Tracking with Uniform Time Division among distributed power sources

2015 IEEE 24th International Symposium on Industrial Electronics (ISIE) ◽

10.1109/isie.2015.7281560 ◽

2015 ◽

Author(s):

Kasemsan Siri

Keyword(s):

Maximum Power ◽

Power Sources ◽

Distributed Power ◽

Maximum Power Tracking ◽

Time Division

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Decentralized and Real-Time Power Dispatch Control for an Islanded Microgrid Supported by Distributed Power Sources

Energies ◽

10.3390/en6126439 ◽

2013 ◽

Vol 6 (12) ◽

pp. 6439-6454 ◽

Cited By ~ 20

Author(s):

Changsun Ahn ◽

Huei Peng

Keyword(s):

Real Time ◽

Power Sources ◽

Distributed Power ◽

Power Dispatch ◽

Islanded Microgrid

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Decarbonising power system with high share of renewables and optionally with or without nuclear, Slovenia case

Thermal Science ◽

10.2298/tsci201117342d ◽

2021 ◽

pp. 342-342

Author(s):

Joze Dimnik ◽

Peter Novak ◽

Simon Muhic

Keyword(s):

Power System ◽

System Analysis ◽

Energy System ◽

System Capacity ◽

Power Sources ◽

Distributed Power ◽

Electricity Grid ◽

National Power ◽

Analysis Computer ◽

Winter Time

The aim of this work is to highlight challenges, if there are any, in decarbonising national power system in Republic of Slovenia. National electricity grid was hourly simulated using EnergyPlan - Advanced energy system analysis computer model in circumstances where distributed power sources capacity exceeds peak system demand. The goal was to estimate the influence of 4400 MW distributed power production to the power grid with peak demand of up to 3000 MW, respecting the fact that distributed power sources partly meet demand in summer sunlight time, however modestly meets demand in winter time. Electricity demand in summer and winter time are of the same magnitude of order. Modest system capacity for electricity storage were respected and influence to cross border transmission demand was estimated. Chalenges related to grid stability were shown and how nuclear can improve grid stability is presented.

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