scholarly journals An Assessment on Harmonics Effect in Customer and the Distributed Power System during Grid Connection of Residential Fuel Cell System

2011 ◽  
Vol 60 (6) ◽  
pp. 1280-1285 ◽  
Author(s):  
Chan-Eom Park ◽  
Jin-Soo Jung ◽  
Woon-Ki Han
Keyword(s):  
Fuel Cell ◽  
Power System ◽  
Cell System ◽  
Fuel Cell System ◽  
Distributed Power ◽  
Grid Connection ◽  
Distributed Power System

scholarly journals Renewable/Fuel Cell Hybrid Power System Operation Using Two Search Controllers of the Optimal Power Needed on the DC Bus

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6111
Author(s):  
Nicu Bizon ◽  
Mircea Raceanu ◽  
Emmanouel Koudoumas ◽  
Adriana Marinoiu ◽  
Emmanuel Karapidakis ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Fuel Cell ◽  
Power System ◽  
Fuel Economy ◽  
Dynamic Load ◽  
Cell System ◽  
Fuel Cell System ◽  
Hybrid Power ◽  
Renewable Power ◽  
Dc Bus

In this paper, the optimal and safe operation of a hybrid power system based on a fuel cell system and renewable energy sources is analyzed. The needed DC power resulting from the power flow balance on the DC bus is ensured by the FC system via the air regulator or the fuel regulator controlled by the power-tracking control reference or both regulators using a switched mode of the above-mentioned reference. The optimal operation of a fuel cell system is ensured by a search for the maximum of multicriteria-based optimization functions focused on fuel economy under perturbation, such as variable renewable energy and dynamic load on the DC bus. Two search controllers based on the global extremum seeking scheme are involved in this search via the remaining fueling regulator and the boost DC–DC converter. Thus, the fuel economy strategies based on the control of the air regulator and the fuel regulator, respectively, on the control of both fueling regulators are analyzed in this study. The fuel savings compared to fuel consumed using the static feed-forward control are 6.63%, 4.36% and 13.72%, respectively, under dynamic load but without renewable power. With renewable power, the needed fuel cell power on the DC bus is lower, so the fuel cell system operates more efficiently. These percentages are increased to 7.28%, 4.94% and 14.97%.

Grid-Connected Inverter with Harmonic Compensation for Distributed Power System

2013 ◽  
Vol 313-314 ◽  
pp. 804-808
Author(s):  
Li Wang ◽  
Wen Xin Huang ◽  
Fei Fei Bu ◽  
Ying Hu
Keyword(s):  
Power System ◽  
Control Strategy ◽  
Reactive Power ◽  
Utilization Efficiency ◽  
Harmonic Compensation ◽  
Distributed Power ◽  
Grid Connection ◽  
Harmonic Pollution ◽  
Distributed Power System ◽  
Grid Connected Inverter

To solve the problem of harmonic pollution in distributed power system, a new type of grid-connected inverter with harmonic compensation is studied in this paper. This system adopts a unified control strategy with decoupled active and reactive power based on grid voltage orientation. Both the grid connection and harmonic compensation are realized together in one inverter, which improves the inverter’s utilization efficiency and protects the power grid from harmonic pollution. The simulation and experimental results are shown to prove the correctness of the control strategy.

scholarly journals A Small Hybrid Power System of Photovoltaic Cell and Sodium Borohydride Hydrolysis-Based Fuel Cell

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 278
Author(s):  
Mingxue Li ◽  
Huichao Deng ◽  
Yufeng Zhang ◽  
Chenjun Hou
Keyword(s):  
Fuel Cell ◽  
Power System ◽  
Power Management ◽  
Lithium Ion ◽  
Photovoltaic Cell ◽  
Power Source ◽  
Cell System ◽  
Fuel Cell System ◽  
Hybrid Power System ◽  
Hybrid Power

Although the hybrid power system that combines a photovoltaic cell and a lithium-ion battery is increasingly mature and practical, long-lifetime auxiliary power will be still needed in severe weather conditions. A small-volume hydrogen–oxygen fuel cell system based on the hydrolysis of NaBH4 is designed. The fuel cell system contains a tiny hydrogen generator, a hydrogen cleaner, and a small fuel cell stack consisting of three units in series. The relationship between the amount of catalyst and output performance is discussed. The long-time discharging results indicate that the fuel cell system has high power capacity. The compact design allows the fuel cell system to integrate the structure with a photovoltaic cell and lithium-ion cell and forms a hybrid power system with a small package. The power management circuit for these power sources without logic devices is designed and tested. The control strategy selects the photovoltaic–battery subsystem as the primary power source, and the fuel cell subsystem works as the backup power source to handle the circumstance when the energy stored in the battery is exhausted. The test results show that the power management system could switch the power supply automatically and timely under various emergency conditions, and the output voltage remains stable all the time.

scholarly journals Active Synchronous Control Strategy of Distributed Power Grid Connection Based on Mobile Network

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Liu Zhang ◽  
Shaohua Ma ◽  
Yangyang Ge ◽  
Cailian Gu ◽  
Hao Wang
Keyword(s):  
Power System ◽  
Control Strategy ◽  
Control Method ◽  
Power Grid ◽  
Mobile Network ◽  
Large Power ◽  
Distributed Power ◽  
Synchronous Control ◽  
Grid Connection ◽  
Distributed Power System

This paper presents an active synchronous control scheme for distributed power grid connection based on the mobile network. This scheme avoids the disadvantages of the traditional control method, such as long waiting time and low reliability, and can meet the requirements of “the hotplug online” distributed power grid connection. The scheme uses the mobile network to collect and detect voltage slip information between the distributed power system and large power grid before operation. When the voltage slip cannot meet the requirements of grid connection, the side voltage information of the distributed power system is actively regulated. The amplitude difference and phase difference signals are, respectively, adjusted by PI, and the generated adjustment signals are, respectively, sent to the corresponding controllers through the mobile network with different weight coefficients. After the receiver receives the regulated signal, it changes the amplitude and frequency of its output voltage by shifting the pendent characteristic curve, so as to realize the distributed power system side voltage and the large power grid side voltage eventually. Finally, simulation analysis and experiments are used to verify the effectiveness and practicability of the active synchronous control strategy.

Performance Analysis of a Floriculture Greenhouse Powered by Integrated Solar Photovoltaic Fuel Cell System

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
A. Ganguly ◽  
S. Ghosh
Keyword(s):  
Fuel Cell ◽  
Performance Analysis ◽  
Power System ◽  
Ventilation System ◽  
Cell System ◽  
Hydrogen Gas ◽  
Energy Deficit ◽  
Solar Photovoltaic ◽  
Fuel Cell System ◽  
Climatic Cycle

In this paper, the performance analysis of a floriculture greenhouse having a fan-pad ventilation system is presented. The greenhouse is powered by integrated solar photovoltaic–electrolyser–fuel cell system. Electrical energy is generated in an array of roof mounted solar photovoltaic modules and energy back up is provided through a combination of polymer electrolyte membrane (PEM) electrolyser and fuel cell system. Excess energy, after meeting the requirements of greenhouse during peak sunshine hours, is supplied to an electrolyser bank to generate hydrogen gas, which is consumed by PEM fuel cell stacks to support the power requirement during the energy deficit hours. The performance of greenhouse and its power system are analyzed for representative days of different seasons of a climatic cycle. The study shows that temperature inside the greenhouse can be maintained within permissible limits for cultivation of target flowers like varieties of rose using fan-pad ventilation. From the performance analysis of power system, it is observed that there is net accumulation of hydrogen gas for representative days of all seasons of a climatic cycle, the daylong cumulative gas generation being maximum in the month of December. The study reinforces the viability of a standalone, grid-independent greenhouse powered through solar energy.

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