A theoretical bilevel control scheme for power networks with large-scale penetration of distributed renewable resources

Boroojeni, Kianoosh G.; Amini, M. Hadi; Nejadpak, Arash; Iyengar, S. Sitharama; Hoseinzadeh, Bakhtyar; Bak, Claus Leth

doi:10.1109/eit.2016.7535293

Cited by 36 publications

(18 citation statements)

References 12 publications

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“…Boroogeni et al [4] proposed a bi-level control framework in order to attain a smart distribution network which uses solar panels as source of energy encompassing several residential and commercial communities with high reliability. It also dispatches the available non-renewable power plants to enhance the reliability of the communities.…”

Section: Introductionmentioning

confidence: 99%

Exergy analysis of a hydrogen and water production process by a solar-driven transcritical CO 2 power cycle with Stirling engine

Naseri

Bidi

Ahmadi

et al. 2017

Journal of Cleaner Production

113

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 A novel cogeneration plant including Stirling engine to produce water and hydrogen. A dynamic RO model including recovery turbine for different permeate flow rate. About 8% reduction in exergy destruction in the system using ideal Stirling engine. More electrical power production, higher than both LNG and CO 2 power cycle. Electrolyzer-based ZLD approach by employing electrolyzer beside RO desalination. ACCEPTED MANUSCRIPT AbstractThis study attempts to go beyond the conventional framework of the integrated solar transcritical CO 2 power cycle works, aimed at further utilization of available exergy as much as possible. This paper proposed a novel system for hydrogen and fresh water production in which a Stirling engine used instead of a condenser, for the places with abundant access to solar radiation and sea, and least to freshwater sources. This proposal leads to further utilization of streams' exergy through the system instead of wasting to the environment, and further power production by the engine followed by the higher products. The electrolyzer employed beside Reverse Osmosis (RO) desalination system, and takes full advantages of highly concentrated brine stream of desalination, eliminating the wastewater rejection through proposed system leading to attaining a near-ZLD approach in fresh water and hydrogen production. This reduces the adverse impacts of desalination's wastewater on the environment. A thermodynamic and exergy analysis is carried out to compare the superiority of this study and investigate the effect of some key parameters on the overall performance of the system as well. The results showed that replacing the condenser by a Stirling engine reduces the exergy destruction through heat transfer from CO 2 to an LNG unit. Exergy destruction was reduced from 16.7% to 8.8% for the above configuration for an ideal Stirling engine that exploits it to produce extra power which its minimum is at least 9 kW and 15 kW higher than CO 2 and LNG power productions.Moreover, Entering RO brine stream, wasting 2.58 kW exergy, to the electrolyzer leads toNaClO and H 2 production besides removing brine stream. In a power plant, sodium hypochlorite is used for disinfection of cooling systems and hydrogen can be used as a source of energy in fuel cells. An examination of some thermodynamic factors showed that higher ACCEPTED MANUSCRIPT 2 CO 2 turbine inlet pressure has an optimum value in producing fresh water and hydrogen, while the higher CO 2 turbine inlet temperature slightly reduces the productions rate. The more recovery ratio also causes a sharp reduction in hydrogen production, whereas it has an optimum amount of fresh water production at recovery ratio equals to 0.47.

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Section: Introductionmentioning

confidence: 99%

Exergy analysis of a hydrogen and water production process by a solar-driven transcritical CO 2 power cycle with Stirling engine

Naseri

Bidi

Ahmadi

et al. 2017

Journal of Cleaner Production

113

View full text Add to dashboard Cite

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“…With increasing environmental awareness, renewable generation penetration has increased gradually [2][3][4][5][6]. There are several MGs already installed for providing the electricity for rural areas [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Robust Frequency and Voltage Stability Control Strategy for Standalone AC/DC Hybrid Microgrid

2017

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Abstract:The microgrid (MG) concept is attracting considerable attention as a solution to energy deficiencies, especially in remote areas, but the intermittent nature of renewable sources and varying loads cause many control problems and thereby affect the quality of power within a microgrid operating in standalone mode. This might cause large frequency and voltage deviations in the system due to unpredictable output power fluctuations. Furthermore, without any main grid support, it is more complex to control and manage the system. In past, droop control and various other coordination control strategies have been presented to stabilize the microgrid frequency and voltages, but in order to utilize the available resources up to their maximum capacity in a positive way, new and robust control mechanisms are required. In this paper, a standalone microgrid is presented, which integrates renewable energy-based distributed generations and local loads. A fuzzy logic-based intelligent control technique is proposed to maintain the frequency and DC (direct current)-link voltage stability for sudden changes in load or generation power. Also from a frequency control perspective, a battery energy storage system (BESS) is suggested as a replacement for a synchronous generator to stabilize the nominal system frequency as a synchronous generator is unable to operate at its maximum efficiency while being controlled for stabilization purposes. Likewise, a super capacitor (SC) and BESS is used to stabilize DC bus voltages even though maximum possible energy is being extracted from renewable generated sources using maximum power point tracking. This newly proposed control method proves to be effective by reducing transient time, minimizing the frequency deviations, maintaining voltages even though maximum power point tracking is working and preventing generators from exceeding their power ratings during disturbances. However, due to the BESS limited capacity, load switching (load shedding scheme) as last option is also introduced in this paper. Simulation results prove the effectiveness of the proposed control strategy from both frequency and voltage perspectives.

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“…Due to the page limit and the scope of the journal, the proof of the existence and global stability of such sliding-mode mechanism, as well as the selection of small number o can be referred to [30,31] for interested readers, which is based on Lyapunov theory. While the ratio k i /k 1 (i = 2, 3,· · · , n + 1) be chosen to put the poles of polynomial p n + (k 2 …”

Section: Nonlinear Observer Based Robust Passive Controlmentioning

confidence: 99%

“…Sustainable energy resources, such as wind, solar, tidal, biomass, etc., are naturally abundant, clean and have a much less harmful impact on the environment than fossil fuels [1]. Meanwhile, an enormous variety of large-scale renewable energy has been integrated into the smart grid [2], while the issue of management and energy shaping of demand side has been well addressed by the use of multi-agent systems in smart distribution [3]. Nowadays, doubly-fed induction generator (DFIG) has been widely employed into wind farm thanks to its merits of decoupled control of active/reactive power and partial-scale converters [4].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Observer-Based Robust Passive Control of Doubly-Fed Induction Generators for Power System Stability Enhancement via Energy Reshaping

Dong

Li²,

Wu³

et al. 2017

Energies

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Abstract:The large-scale penetration of wind power might lead to degradation of the power system stability due to its inherent feature of randomness. Hence, proper control designs which can effectively handle various uncertainties become very crucial. This paper designs a novel robust passive control (RPC) scheme of a doubly-fed induction generator (DFIG) for power system stability enhancement. The combinatorial effect of generator nonlinearities and parameter uncertainties, unmodelled dynamics, wind speed randomness, is aggregated into a perturbation, which is rapidly estimated by a nonlinear extended state observer (ESO) in real-time. Then, the perturbation estimate is fully compensated by a robust passive controller to realize a globally consistent control performance, in which the energy of the closed-loop system is carefully reshaped through output feedback passification, such that a considerable system damping can be injected to improve the transient responses of DFIG in various operation conditions of power systems. Six case studies are carried out while simulation results verify that RPC can rapidly stabilize the disturbed DFIG system much faster with less overshoot, as well as supress power oscillations more effectively compared to that of linear proportional-integral-derivative (PID) control and nonlinear feedback linearization control (FLC).

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A theoretical bilevel control scheme for power networks with large-scale penetration of distributed renewable resources

Cited by 36 publications

References 12 publications

Exergy analysis of a hydrogen and water production process by a solar-driven transcritical CO 2 power cycle with Stirling engine

Exergy analysis of a hydrogen and water production process by a solar-driven transcritical CO 2 power cycle with Stirling engine

Robust Frequency and Voltage Stability Control Strategy for Standalone AC/DC Hybrid Microgrid

Nonlinear Observer-Based Robust Passive Control of Doubly-Fed Induction Generators for Power System Stability Enhancement via Energy Reshaping

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