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Journal articles on the topic 'Active power conditioning'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Augusto Oliveira Da Silva, Sergio, Leonardo Bruno Garcia Campanhol, Vinícius Dário Bacon, and Leonardo Poltronieri Sampaio. "Single-phase Grid-connected Photovoltaic System With Active Power Line Conditioning." Eletrônica de Potência 20, no. 1 (February 1, 2015): 8–18. http://dx.doi.org/10.18618/rep.2015.1.008018.

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2

Grady, W. M., M. J. Samotyj, and A. H. Noyola. "Survey of active power line conditioning methodologies." IEEE Transactions on Power Delivery 5, no. 3 (July 1990): 1536–42. http://dx.doi.org/10.1109/61.57998.

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3

Somlal, Jarupula, and M. Venu Gopala Rao. "Space Vector Modulated Hybrid Active Power Filter For Power Conditioning." i-manager's Journal on Electrical Engineering 5, no. 2 (December 15, 2011): 20–26. http://dx.doi.org/10.26634/jee.5.2.1580.

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4

Akagi, H. "New trends in active filters for power conditioning." IEEE Transactions on Industry Applications 32, no. 6 (1996): 1312–22. http://dx.doi.org/10.1109/28.556633.

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5

Barrero, F., S. Martinez, F. Yeves, and P. M. Martinez. "Active power filters for line conditioning: a critical evaluation." IEEE Transactions on Power Delivery 15, no. 1 (2000): 319–25. http://dx.doi.org/10.1109/61.847269.

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6

Azevedo, Helder J., José M. Ferreira, António P. Martins, and Adriano S. Carvalho. "An Active Power Filter with Direct Current Control for Power Quality Conditioning." Electric Power Components and Systems 36, no. 6 (May 26, 2008): 587–601. http://dx.doi.org/10.1080/15325000701801587.

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7

STEEB, H., A. MEHRMANN, W. SEEGER, and W. SCHNURNBERGER. "Solar hydrogen production: Photovoltaic/electrolyzer system with active power conditioning." International Journal of Hydrogen Energy 10, no. 6 (1985): 353–58. http://dx.doi.org/10.1016/0360-3199(85)90060-6.

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8

Farhoodnea, Masoud, Azah Mohamed, Hussain Shareef, and Hadi Zayandehroodi. "An enhanced premium power park configuration using active power and voltage conditioning devices." Control Engineering Practice 21, no. 11 (November 2013): 1542–52. http://dx.doi.org/10.1016/j.conengprac.2013.07.006.

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9

Barrero, F., S. Martinez, F. Yeves, F. Mur, and P. Martinez. "Universal and Reconfigurable to UPS Active Power Filter for Line Conditioning." IEEE Power Engineering Review 22, no. 8 (August 2002): 72. http://dx.doi.org/10.1109/mper.2002.4312533.

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Barrero, F., S. Martinez, F. Yeves, F. Mur, and P. M. Martinez. "Universal and reconfigurable to UPS active power filter for line conditioning." IEEE Transactions on Power Delivery 18, no. 1 (January 2003): 283–90. http://dx.doi.org/10.1109/tpwrd.2002.804014.

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11

Furga, G. Superti, E. Tironi, and G. Ubezio. "Sliding mode control for a combined active-passive power-conditioning equipment." European Transactions on Electrical Power 7, no. 2 (September 7, 2007): 85–90. http://dx.doi.org/10.1002/etep.4450070202.

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12

Wai, Rong-Jong, and Chun-Yu Lin. "Active Low-Frequency Ripple Control for Clean-Energy Power-Conditioning Mechanism." IEEE Transactions on Industrial Electronics 57, no. 11 (November 2010): 3780–92. http://dx.doi.org/10.1109/tie.2010.2040569.

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13

Dybko, Maxim, Sergey Brovanov, and Hong Hee Lee. "Multilevel NPC Converters in Parallel Connection for Power Conditioning Systems." Applied Mechanics and Materials 792 (September 2015): 189–96. http://dx.doi.org/10.4028/www.scientific.net/amm.792.189.

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This paper investigates a multilevel combined NPC converter for medium-and high-power energy storage systems and active power filters. The proposed multilevel NPC converter is composed of a parallel connection of multiple NPC converters using the current sharing reactors and involves the phase shifted PWM strategy for better energy quality performance. Using the switching function-based mathematical model, the proposed multilevel converter is evaluated to show the energy quality performance and fault tolerance of an energy storage system or active power filter. In addition, the switching frequency of circulating currents is analyzed to obtain its relationship with the converter parameters and maximum sharing reactor current ripple. The performance of the proposed multilevel converter is verified by simulation.

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14

Ünsal, Abdurrahman, Annette R. von Jouanne, and Virginia L. Stonick. "A DSP controlled resonant active filter for power conditioning in three-phase industrial power systems." Signal Processing 82, no. 11 (November 2002): 1743–52. http://dx.doi.org/10.1016/s0165-1684(02)00335-3.

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15

Dovgun, Valery, Sergei Temerbaev, Maxim Chernyshov, Viktor Novikov, Natalia Boyarskaya, and Elena Gracheva. "Distributed Power Quality Conditioning System for Three-Phase Four-Wire Low Voltage Networks." Energies 13, no. 18 (September 19, 2020): 4915. http://dx.doi.org/10.3390/en13184915.

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This paper presents distributed power quality conditioning system to compensate current and voltage distortions in three-phase four-wire networks caused by unbalanced non-linear single-phase loads. The proposed conditioning system consists of several hybrid filter units installed in various nodes for compensation of excessive neutral currents and voltage distortions in a selected area of the distribution network. The system is open and it can be easily modified by installation of new filter units. A novel hybrid filter design procedure based on filter frequency characteristics optimization in the parameters of passive and active parts is presented. A digital system of control signal computation for active filters based on the use of modern methods of spectral analysis is considered. The proposed digital control system enables selective compensation of fundamental and harmonic components. The mathematical model of the proposed power quality conditioning system is developed in the MatLab software. The simulated results show that the presented conditioning system reduces the level of neutral conductor currents and the voltage unbalance as well ensures harmonic compensation in three-phase four-wire networks.

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16

Rong-Jong Wai and Chun-Yu Lin. "Dual Active Low-Frequency Ripple Control for Clean-Energy Power-Conditioning Mechanism." IEEE Transactions on Industrial Electronics 58, no. 11 (November 2011): 5172–85. http://dx.doi.org/10.1109/tie.2011.2126533.

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17

Zhu, Jian-hong, Juping Gu, and Min Wu. "Grid-Friendly Active Demand Strategy on Air Conditioning Class Load." Applied Sciences 10, no. 18 (September 16, 2020): 6464. http://dx.doi.org/10.3390/app10186464.

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The growing number of accessed energy-efficient frequency conversion air conditioners is likely to generate a large number of harmonics on the power grid. The following shortage in the reactive power of peak load may trigger voltage collapse. Hence, this conflicts with people’s expectations for a cozy environment. Concerning the problems mentioned above, an active management scheme is put forward to balance the electricity use and the normal operation of air conditioning systems. To be specific, first, schemes to suppress the low voltage ride through (LVRT) and harmonic are designed. Second, to deaden the adverse effects caused by nonlinear group load running on the grid and prevent the unexpected accidents engendered from grid malfunction, the dynamic sensing information obtained by an online monitor is analyzed, which can be seen as an actively supervised mechanism. The combined application of active and passive filtering technology is studied as well. Third, the new energy storage is accessed reliably to cope with peak-cutting or grid breaking emergencies, and the fuzzy control algorithm is researched. Finally, system feasibility is verified by functional modules co-operation simulation, and active management target is achieved under scientific and reasonable state-of-charge (SOC) management strategy.

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18

Sahoo, Ashwin Kumar, Nalinikanta Mohanty, and Anupriya M. "Modeling and Simulation of Superconducting Magnetic Energy Storage Systems." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 3 (September 1, 2015): 524. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp524-537.

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This paper aims to model the Superconducting Magnetic Energy Storage System (SMES) using various Power Conditioning Systems (PCS) such as, Thyristor based PCS (Six-pulse converter and Twelve-pulse converter) and Voltage Source Converter (VSC) based PCS. Modeling and Simulation of Thyristor based PCS and VSC based PCS has been carried out. Comparison has also been carried out based on various criteria such as Total Harmonic Distortion (THD), active and reactive power control ability, control structure and power handling capacity. MATLAB/Simulink is used to simulate the various Power Conditioning Systems of SMES.

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19

Oliveira, Fernando M., Sérgio A. Oliveira da Silva, Fábio R. Durand, Leonardo P. Sampaio, Vinícius D. Bacon, and Leonardo B. G. Campanhol. "Grid‐tied photovoltaic system based on PSO MPPT technique with active power line conditioning." IET Power Electronics 9, no. 6 (May 2016): 1180–91. http://dx.doi.org/10.1049/iet-pel.2015.0655.

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20

Gupta, Nitin, S. P. Dubey, and S. P. Singh. "Neural network-based shunt active filter with direct current control for power quality conditioning." International Journal of Power Electronics 3, no. 6 (2011): 597. http://dx.doi.org/10.1504/ijpelec.2011.042803.

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21

Sung-Yeul Park, Chien-Liang Chen, and J. S. J. Lai. "A Wide-Range Active and Reactive Power Flow Controller for a Solid Oxide Fuel Cell Power Conditioning System." IEEE Transactions on Power Electronics 23, no. 6 (November 2008): 2703–9. http://dx.doi.org/10.1109/tpel.2008.2003959.

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22

Silva, Sérgio Augusto Oliveira da, Pedro F. Donoso-Garcia, Porfírio C. Cortizo, and Paulo F. Seixas. "A line-interactive UPS system implementation with series-parallel active power-line conditioning for three-phase, four-wire systems." Sba: Controle & Automação Sociedade Brasileira de Automatica 16, no. 2 (June 2005): 200–210. http://dx.doi.org/10.1590/s0103-17592005000200008.

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This paper presents a three-phase line-interactive uninterruptible power supply (UPS) system with active series-parallel power-line conditioning capabilities. Synchronous reference frame (SRF)-based controller is used for harmonic and reactive power compensation generated from any configuration of non-linear loads. Under normal line conditions the UPS system works with universal filtering capabilities, such as compensating the input currents and output voltages. Two three-phase pulsewidth modulation (PWM) converters, called series and parallel active filters, are used to perform the series and parallel active power-line compensation. The series active filter works as sinusoidal current source in phase with the input voltage, drawing from utility sinusoidal and balanced input currents with low total harmonic distortion (THD). The parallel active filter works as sinusoidal voltage source in phase with the input voltage, providing regulated and sinusoidal output voltages with low THD. The performance of the UPS system is evaluated in three-phase, four-wire systems. Experimental results are presented to confirm the theoretical studies.

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23

Jiang, Zhe, and Zhong Dong Yin. "Application of Super-Capacitor in Grid-Connected Photovoltaic Power Generation System." Applied Mechanics and Materials 291-294 (February 2013): 43–46. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.43.

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The impact of grid-connected photovoltaic power on power quality and reliability of power supply has gained more attention, with the continuous improvement of its generation capacity. This paper describes the power conditioning system of grid-connected photovoltaic power plants based on super-capacitor energy storage, which acts as the energy storage element to stabilize fluctuations in output active power of photovoltaic power generation system. Based on the configuration and principle of the power control system, a power and current double closed loop feedback hysteresis current control strategy is proposed in details, which controls the super capacitor energy storage system to absorb and complement the active power output fluctuations of the photovoltaic power generation system. The effectiveness and good operating performance of the device and control strategy are validated by simulation with PSCAD/ EMTDC.

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24

Ma, Chao-Tsung, and Yi-Hung Tian. "Design and Implementation of a SiC-Based VRFB Power Conditioning System." Micromachines 11, no. 12 (December 12, 2020): 1099. http://dx.doi.org/10.3390/mi11121099.

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An energy storage system using secondary batteries combined with advanced power control schemes is considered the key technology for the sustainable development of renewable energy-based power generation and smart micro-grids. The performance of energy storage systems in practical application mainly depends on their power conditioning systems. This paper proposes a silicon carbide-based multifunctional power conditioning system for the vanadium redox flow battery. The proposed system is a two-stage circuit topology, including a three-phase grid-tie inverter that can perform four-quadrant control of active and reactive power and a bi-directional multi-channel direct current converter that is responsible for the fast charging and discharging control of the battery. To achieve the design objectives, i.e., high reliability, high efficiency, and high operational flexibility, silicon carbide-based switching devices, and advanced digital control schemes are used in the construction of a power conditioning system for the vanadium redox flow battery. This paper first describes the proposed system topologies and controller configurations and the design methods of controllers for each converter in detail, and then results from both simulation analyses and experimental tests on a 5 kVA hardware prototype are presented to verify the feasibility and effectiveness of the proposed system and the designed controllers.

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Savarimuthu, Kirubaveni, Radha Sankararajan, and Sudha Murugesan. "Design and implementation of piezoelectric energy harvesting circuit." Circuit World 43, no. 2 (May 2, 2017): 63–71. http://dx.doi.org/10.1108/cw-12-2016-0065.

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Purpose The purpose of this paper is to present the design of a piezoelectric vibration energy generator with a power conditioning circuit to power a wireless sensor node. Frequency and voltage characterization of the piezoelectric energy harvester is performed. A single-stage AC–DC power converter that integrates the rectification and boosting circuit is designed, simulated and implemented in hardware. Design/methodology/approach The designed power conditioning circuit incorporates bridgeless boost rectification, a lithium ion battery as an energy storage unit and voltage regulation to extract maximum power from PZT-5H and to attain higher efficiency. The sensor node is modelled in active and sleep states on the basis of the power consumption. Dynamic modelling of the lithium ion battery with its state of charging and discharging is analysed. Findings The test result shows that the energy harvester produces a maximum power of 65.9 mW at the resonant frequency of 21.4 Hz. The designed circuit will operate even at a minimum input voltage of 0.5 V. The output from the harvester is rectified, boosted to a 7-V DC output and regulated to 3.3 V to the power C_Mote wireless sensor node. The conversion efficiency of the circuit is improved to 70.03 per cent with a reduced loss of 19.76 mW. Originality/value The performance of the energy harvester and the single-stage power conditioning circuit is analysed. Further, the design and implementation of the proposed circuit lead to an improved conversion efficiency of 70.03 per cent with a reduced loss of 19.76 mW. The vibration energy harvester is integrated with a power conditioning circuit to power a wireless sensor node C_Mote. The piezoelectric vibration energy harvester is implemented in real time to power C_Mote.

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26

Kudithi, Nageswara Rao, and Sakda Somkun. "Power flow management of triple active bridge for fuel cell applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (June 1, 2019): 672. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp672-681.

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<p>The power conditioning circuits which are used in fuel cell systems should carefully be designed to prolong the life span of the system, for the reason of the dynamic nature, such that the unexpected and extreme changes in load decreases the life of the fuel cells. This paper presents the triple active bridge (TAB) and it’s average small signal modelling, which is used for design of the system controllers for stable operation. The extended symmetrical optimum method is used for realized the proportional integral (PI) controller, to control the output/Load voltage and power flow in the fuel cell/Source with a guaranteed minimum phase margin for the system with a variable process gain in addition to other accepted desired performances. This method ensures the maximum phase margin at a minimum required value at the desired gain crossover frequency with a compromise between system’s peak overshoot, rise time and settling time. This model and this approach helps in designing TAB suitable for healthy and uninterrupted fuel cell power generation systems as a part of a renewable /clean energy system. MATLAB/Simulink is used to simulate the proposed controllers with TAB.</p>

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27

Wang, Shi Hong, Zhi Wei Huang, Pei Cheng Xie, Wei Ru Chen, Jiang Zeng, and Sen Ouyang. "Design and Implementation of the Controller of Active Power Filter Based on Dual-DSP." Applied Mechanics and Materials 543-547 (March 2014): 770–75. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.770.

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This paper has designed an active power filter control system with dual digital signal processor (DSP) core, which meets the requirements of functional and intelligent design of the active power filter (APF), and improves the real-time performance efficiency of the controller. Firstly, the structure of the controller hardware system design process, as well as major hardware modules were analyzed in detail; Then in-depth analysis of AD conditioning circuit module, analog-to-digital converter module, dual-port RAM modules and fault detection circuit module as well as the dual DSP program process was introduced. Finally the real-time performance and accuracy of the designed controller was proved by the performance test.

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Kudithi, Nageswara Rao, and Sakda Somkun. "Single Phase Power Generation System from Fuel Cell." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 4 (December 1, 2018): 1676. http://dx.doi.org/10.11591/ijpeds.v9.i4.pp1676-1684.

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Power conditioning circuits are required for the fuel cell systems due to its nature in energetic state. This paper proposed the small signal average modelling of a duel active bridge (DAB) DC-DC converter with LC filter, to generate the single phase AC power by using the H1000 fuel cell system. The controller is designed for the stable operation of the system. Implemented the controller, which gives the constant output voltage to DC-bus from the DAB DC-DC converter, this DC-bus voltage fed to the inverter, which inverts the DC-bus voltage to single Phase AC power with the LC-filter. The proposed system simulated in the MATLAB/Simulink.

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29

da Silva, S. A. O., P. F. Donoso-Garcia, P. C. Cortizo, and P. F. Seixas. "A three-phase line-interactive UPS system implementation with series-parallel active power-line conditioning capabilities." IEEE Transactions on Industry Applications 38, no. 6 (November 2002): 1581–90. http://dx.doi.org/10.1109/tia.2002.804760.

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30

Gil-González, Walter, and Oscar Danilo Montoya. "Active and reactive power conditioning using SMES devices with PMW-CSC: A feedback nonlinear control approach." Ain Shams Engineering Journal 10, no. 2 (June 2019): 369–78. http://dx.doi.org/10.1016/j.asej.2019.01.001.

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31

Bidyuk, B., R. Dechter, and E. Rollon. "Active Tuples-based Scheme for Bounding Posterior Beliefs." Journal of Artificial Intelligence Research 39 (September 30, 2010): 335–71. http://dx.doi.org/10.1613/jair.2945.

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The paper presents a scheme for computing lower and upper bounds on the posterior marginals in Bayesian networks with discrete variables. Its power lies in its ability to use any available scheme that bounds the probability of evidence or posterior marginals and enhance its performance in an anytime manner. The scheme uses the cutset conditioning principle to tighten existing bounding schemes and to facilitate anytime behavior, utilizing a fixed number of cutset tuples. The accuracy of the bounds improves as the number of used cutset tuples increases and so does the computation time. We demonstrate empirically the value of our scheme for bounding posterior marginals and probability of evidence using a variant of the bound propagation algorithm as a plug-in scheme.

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32

Kashif, Muhammad, Muhammad Sultan, and Zahid Mahmood Khan. "Alternative Air-Conditioning Options for Developing Countries." European Journal of Engineering Research and Science 2, no. 1 (January 31, 2017): 76. http://dx.doi.org/10.24018/ejers.2017.2.1.261.

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This study assesses the potential selection of efficient air-conditioning (AC) and cooling systems in order to avoid excess power consumption, mitigation of harmful refrigerants generated by the existing AC systems. Several varieties of active and passive air-conditioning systems i.e. heating ventilating air-conditioning (HVAC), vapor compression air-conditioning (VCAC) conventional direct evaporative cooling (DEC) and indirect evaporative cooling (IEC) and desiccant air-conditioning (DAC) systems are under practice for the cooling and dehumidification. The storage of agricultural products mainly based on product individual characteristics i.e. respiration rate, transpiration rate and moisture content of that product. Variant ambient air conditions and the type of application are the main parameters for the choice of air-conditioning system to get optimum performance. The DAC system subsidize the coefficient of performance (COP) in humid regions, coastal ranges of developing countries e.g. Karachi and Gawadar (Pakistan) with hot humid climatic conditions. In similar way, hottest regions of the country such as Sibbi, Jacobabad and Multan perform better results when incorporates with M-cycle evaporative cooling system. Variation in ambient air conditions directly affect the cooling load and the choice of sustainable air-conditioning system

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33

Vavilapalli, Sridhar, Umashankar Subramaniam, Sanjeevikumar Padmanaban, and Frede Blaabjerg. "Design and Controller-In-Loop Simulations of a Low Cost Two-Stage PV-Simulator." Energies 11, no. 10 (October 16, 2018): 2774. http://dx.doi.org/10.3390/en11102774.

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A PV-Simulator is a DC power source in which the current-voltage (I-V) characteristics of different PV arrays can be programmed. With a PV-simulator, the operation of the solar power conditioning systems can be validated at a laboratory level itself before actual field trials. In this work, design, operation and controls for a two-stage programmable PV-simulator required for the testing of solar power conditioning systems are presented. The proposed PV-simulator consists of a three-level T-type active front-end converter in the first stage and a buck-chopper-based DC-DC converter in the second stage. An active front-end rectifier using a three-level T-type IGBT-based converter is used at the input stage to help in operating the system at unity power factor. A DC-DC converter at the output stage of the simulator is regulated to obtain the I-V characteristics of the programmed PV-Array. Hardware-In-Loop simulations are carried out to validate the proposed system and the associated controls implemented in the controller. As a case study, this PV-simulator is programmed with electrical parameters of a selected PV-array and the characteristics obtained from the PV-simulator are compared with the actual PV-array characteristics. The dynamic response of the system for sudden changes in the load and sudden changes in irradiance values are studied.

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Machado, Birajara Soares, Ana Carolina Bione Kunicki, Edgard Morya, and Koichi Sameshima. "Spectral characteristics of the hippocampal LFP during contextual fear conditioning." Einstein (São Paulo) 10, no. 2 (June 2012): 140–44. http://dx.doi.org/10.1590/s1679-45082012000200005.

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OBJECTIVE: The hippocampus has an important role in the acquisition and recall of aversive memories. The objective of this study was to investigate the relationship among hippocampal rhythms. METHODS: Microeletrodes arrays were implanted in the hippocampus of Wistar rats. The animals were trained and tested in a contextual fear conditioning task. The training consisted in applying shocks in the legs. The memory test was performed 1 day (recent memory) or 18 days (remote memory) after training. We proposed a measure based on the FFT power spectrum, denominated "delta-theta ratio", to characterize the different behaviors (active exploration and freezing) and the memories types. RESULTS: The delta-theta ratio was able to distinguish recent and remote memories. In this study, the ratio for the 18-day group was smaller than for the 1-day group. Moreover, this measure was useful to distinguish the different behavior states – active exploration and freezing. CONCLUSIONS: The results suggest delta-theta oscillations could reflect the demands on information processing during recent and remote memory recalls.

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35

Kuznetsov, Pavel, Sergej Solyonyj, Yuriy Sychev, and Boris Abramovich. "Maintenance problems of PWM-inverters in power networks with distributed generation." MATEC Web of Conferences 161 (2018): 02010. http://dx.doi.org/10.1051/matecconf/201816102010.

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This article observes maintenance problems of PWM-Electric Drive in Power Networks with distributed generation (DG). Compared to conventional centralized networks harmonics disturbances and non-sinusoidal waveforms happen faster in DG networks due to bigger amount of non-linear loads (Frequency and Power AC and DC Converters, PWM-Electric Drive, etc.). As a result, general stability, power quality and uninterruptible power supply can be disturbed. In order to prevent these factors a complex of power conditioning measures is proposed in this article. It demonstrates the possible influence of Active Power Filters with selective harmonics compensation function implementation together with developed controller and preventive algorithm. Almost all modelling was performed in Matlab/Simulink software.

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Nechay, Bettina, Megan Snook, Harold Hearne, Ty McNutt, Victor Veliadis, Sharon Woodruff, R. S. Howell, David Giorgi, Joseph White, and Stuart Davis. "High-Yield 4H-SiC Thyristors for Wafer-Scale Interconnection." Materials Science Forum 717-720 (May 2012): 1171–74. http://dx.doi.org/10.4028/www.scientific.net/msf.717-720.1171.

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Modern power conditioning systems require large active area devices which can support high currents. Though the breakdown and thermal properties of SiC make it an excellent choice for power switching applications, active area size is currently limited due to material and processing defects. One alternative is to parallel discrete diced die to achieve large active areas. However, this increases cost and complexity through dicing, soldering, and forming multiple wire bonds. Furthermore, paralleling discrete devices increases package volume/weight and reduces power density. To overcome these issues and achieve devices of high current switching capabilities, thyristors were designed and fabricated for the purpose of wafer-scale interconnection - which avoids the need of dicing and bonding and can achieve significant current density improvement over the paralleled diced device approach. Discrete thyristors fabricated for interconnection exhibited excellent yields and good uniformity of both blocking and on-state characteristics, showing great promise for large-scale interconnection.

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Chen, Jian, Peng Li, Gangbing Song, Yu Tan, Yongjun Zheng, and Yu Han. "Systematic Development of a Wireless Sensor Network for Piezo-Based Sensing." Journal of Sensors 2018 (August 16, 2018): 1–12. http://dx.doi.org/10.1155/2018/9315364.

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A low-power wireless sensor/actuator network was specially developed and optimized for piezoceramic transducer-based active sensing applications. Wireless sensor network promises increased system flexibility, lower system cost, and increased robustness through decentralization. Piezoceramic signal conditioning circuit, actuating circuit, power management, and wireless microcontroller were integrated in the hardware design. IEEE 802.15.4 wireless stack protocol was implemented on the hardware, and user input/output management together with a shell provided easier debugging and configuring interface. The designed system provides a low-power wireless solution towards many applications such as wireless structural health monitoring and wireless structural vibration control.

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38

Beck, H. P., C. Sourkounis, and J. Wenske. "Statischer Synchronkonverter mit aktiver Dämpfungseinrichtung zur Energiekonditionierung (Static synchronous converter with active damping-circuit for use in power conditioning)." Electrical Engineering (Archiv fur Elektrotechnik) 81, no. 6 (April 23, 1999): 395–407. http://dx.doi.org/10.1007/s002020050066.

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39

Oliveira da Silva, S. A., P. Donoso-Garcia, P. C. Cortizo, and P. F. Seixas. "A line-interactive UPS system implementation with series-parallel active power-line conditioning for three-phase, four-wire systems." International Journal of Electrical Power & Energy Systems 26, no. 6 (July 2004): 399–411. http://dx.doi.org/10.1016/j.ijepes.2003.11.008.

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Proctor, David N., Jordan D. Miller, Niki M. Dietz, Christopher T. Minson, and Michael J. Joyner. "Reduced submaximal leg blood flow after high-intensity aerobic training." Journal of Applied Physiology 91, no. 6 (December 1, 2001): 2619–27. http://dx.doi.org/10.1152/jappl.2001.91.6.2619.

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This study evaluated the hypothesis that active muscle blood flow is lower during exercise at a given submaximal power output after aerobic conditioning as a result of unchanged cardiac output and blunted splanchnic vasoconstriction. Eight untrained subjects (4 men, 4 women, 23–31 yr) performed high-intensity aerobic training for 9–12 wk. Leg blood flow (femoral vein thermodilution), splanchnic blood flow (indocyanine green clearance), cardiac output (acetylene rebreathing), whole body O2 uptake (V˙o 2), and arterial-venous blood gases were measured before and after training at identical submaximal power outputs (70 and 140 W; upright 2-leg cycling). Training increased ( P < 0.05) peak V˙o 2(12–36%) but did not significantly change submaximalV˙o 2 or cardiac output. Leg blood flow during both submaximal power outputs averaged 18% lower after training ( P = 0.001; n = 7), but these reductions were not correlated with changes in splanchnic vasoconstriction. Submaximal leg V˙o 2 was also lower after training. These findings support the hypothesis that aerobic training reduces active muscle blood flow at a given submaximal power output. However, changes in leg and splanchnic blood flow resulting from high-intensity training may not be causally linked.

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Żmojda, Jacek, Piotr Miluski, Marcin Kochanowicz, Jan Dorosz, Agata Baranowska, Magdalena Leśniak, and Dominik Dorosz. "Luminescent properties of active optical fibers." Photonics Letters of Poland 11, no. 2 (July 1, 2019): 50. http://dx.doi.org/10.4302/plp.v11i2.908.

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Luminescent optical fibres are one of the most important photonics elements as they allow to construct high power fibre lasers and different unique optical sources in the broad range from UV to IR. The most important requirements cover efficient luminescence core materials and easily pumped optical fibre constructions. Depends on the applications the variety of optical fibres have been proposed based on glasses and polymers. In the paper some recent constructions developed in Bialystok Photonics Group have been shown. Full Text: PDF ReferencesA. Zajac, D. Dorosz, M. Kochanowicz, M. Skórczakowski, J. Świderski, "Fibre lasers - conditioning constructional and technological", Bull. Pol. Ac.: Tech. 58, 4 (2010) CrossRef M. Kochanowicz, J. Zmojda, P. Miluski, A. Baranowska, M. Leich, A. Schwuchow, M. Jager, M. Kuwik, J. Pisarska, W. A. Pisarski, D.Dorosz, "Tm3+/Ho3+ co-doped germanate glass and double-clad optical fiber for broadband emission and lasing above 2 µm", Optical Materials Express, 9, 3 (2019) CrossRef J. Zmojda, M. Kochanowicz, P. Miluski, W.A., Pisarski, J. Pisarska, R. Jadach, M. Sitarz, D. Dorosz, "Structural and optical properties of antimony-germanate-borate glass and glass fiber co-doped Eu3+ and Ag nanoparticles", Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 201 (2018) CrossRef P. Miluski, M. Kochanowicz, J. Zmojda, A. Baranowska, D. Dorosz, "Energy transfer of Tb(tmhd)3 - Rhodamine B in poly(methyl methacrylate) fiber for new photonic applications", Optical Materials 87, 132 (2019) CrossRef

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Massoud, Ahmed M., Stephen J. Finney, Andrew J. Cruden, and Barry W. Williams. "Three-Phase, Three-Wire, Five-Level Cascaded Shunt Active Filter for Power Conditioning, Using Two Different Space Vector Modulation Techniques." IEEE Transactions on Power Delivery 22, no. 4 (October 2007): 2349–61. http://dx.doi.org/10.1109/tpwrd.2007.905447.

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CH, Sri Prakash. "An Fundamental Current Reference Control Strategy for DSTATCOM under Various Load Situations." Indonesian Journal of Electrical Engineering and Computer Science 7, no. 3 (September 1, 2017): 606. http://dx.doi.org/10.11591/ijeecs.v7.i3.pp606-616.

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Effort for power quality enhancement is gradually raised in power transmission and distribution system. In a distribution system, it is a pre-requisite consumer related concern which is addressed by evading the mis-operation of massive power electronic load apparatus. Due to this, voltage/current harmonic distortions are acquired at common coupling point, which influences the disruption of quality power in a distribution system. A reliable and efficient active power conditioner is utilized for acquiring the power quality features in a three phase distribution system with attractive control objective. Over the classical conditioning techniques, a D-STATCOM plays a key role in a distribution system for power quality enhancement. Formal control objectives are adversed with incredible switching losses due to extreme harmonized frequencies in a reference current component. This paper proposes the imperative reference current extraction scheme for optimal functioning of DSTATCOM with reduced switching losses and gaining the incredible efficiency. The validation of DSTATCOM with proposed control strategy under several load situations (linear/non-linear & balanced/un-balanced) is evaluated by using Matlab/Simulink platform and simulation results are conferred.

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Lopez-Santos, Oswaldo, Sebastián Tilaguy-Lezama, Sandra Patricia Rico-Ramírez, and Luis Darío Cortes-Torres. "Operation of a Photovoltaic Microinverter as Active Power Filter using the single phase P-Q Theory and Sliding Mode Control." Ingeniería 22, no. 2 (May 5, 2017): 254. http://dx.doi.org/10.14483/udistrital.jour.reving.2017.2.a06.

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Context: Microinverters are widely used in modular photovoltaic installations but its operation with reduced power is limited to inject real power into the grid. One way to optimize the use of microinverters consist of providing them the Active Power Filtering (APF) capability, which allows its use as both distributed generation and compensation unit even under unfavorable conditions of insolation. With this approach, the output stage of the microinverter can provide reactive and distortive components of power in order to compensate power quality defects of a localized load.Method: This paper proposes a non-linear control strategy to integrate the APF function in a single-phase two-stage photovoltaic microinverter. The proposal involves the use of the single-phase P-Q theory to generate the current reference, sliding mode control to achieve a robust tracking of that reference and linear robust control to maintain the power balance regulating the DC-link voltage of the microinverter. The proposed control does not require the use of low-pass filters and in turn uses a recursive average computation improving the general performance of the system.Results: The theoretical approach is validated by means of simulation results in which appropriate levels of harmonic distortion are obtained in the grid-side current for different load types and power levels. The robustness of the control system is tested by applying disturbances in the harmonic content of the load current and its power level obtaining an appropriate dynamic performance adapted to the demands of the application.Conclusions: The main advantage of this proposal is the possibility to add the active filter function to coventional microinverters extending its capability to power conditioning only integrating some algorithms. A simple design method to ensure reliability, robustness and high power quality is detailed.Language: English

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Warren, M. L., and M. Wahlig. "Cost and Performance Goals for Commercial Active Solar Absorption Cooling Systems." Journal of Solar Energy Engineering 107, no. 2 (May 1, 1985): 136–40. http://dx.doi.org/10.1115/1.3267666.

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Economic and thermal performance analysis is used to determine cost goals for typical commercial active solar cooling systems to be installed between the years 1986 and 2000. Market penetration for heating, ventilating, and air conditioning systems depends on payback period, which is related to the expected return on investment. Postulating a market share for solar cooling systems increasing to 20 percent by the year 2000, payback and return on investment goals as a function of year of purchase are established. The incremental solar system cost goals must be equal to or less than the 20-year percent value of future energy savings, based on thermal performance analysis, at the desired return on investment. The methodology is applied to determine the allowable incremental solar system cost for commercial-scale, 25-ton absorption cooling systems based on the thermal performance predicted by recent simulation analysis, Methods for achieving these cost goals and expected solar cooling system costs will be discussed.

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House, John M., Kwangduk Douglas Lee, and Leslie K. Norford. "Controls and Diagnostics for Air Distribution Systems." Journal of Solar Energy Engineering 125, no. 3 (August 1, 2003): 310–17. http://dx.doi.org/10.1115/1.1592185.

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Fault detection and diagnostics applied to heating, ventilating, and air-conditioning (HVAC) equipment has been an active area of research over the past decade, with much of the work focusing on air distribution systems. Concurrent efforts have sought to improve the control of these systems. This paper discusses the relationship between controls and diagnostics for air distribution systems, provides an overview of the diagnostic literature for these systems, presents new findings from a diagnostic method that enables operational characteristics of individual HVAC components to be extracted from high-frequency measurements of whole-building power, and outlines research challenges that remain to be addressed.

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Cooper, Joshua H. F., Blake E. G. Collins, David R. Adams, Robert A. Robergs, and Cheyne E. Donges. "Limited Effects of Endurance or Interval Training on Visceral Adipose Tissue and Systemic Inflammation in Sedentary Middle-Aged Men." Journal of Obesity 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/2479597.

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Purpose. Limited data exists for the effects of sprint-interval training (SIT) and endurance training (ET) on total body composition, abdominal visceral adipose tissue, and plasma inflammation. Moreover, whether “active” or “passive” recovery in SIT provides a differential effect on these measures remains uncertain.Methods. Sedentary middle-aged men (n=62;49.5±5.8 y;29.7±3.7 kg·m2) underwent abdominal computed tomography, dual-energy X-ray absorptiometry, venepuncture, and exercise testing before and after the interventions, which included the following: 12 wks 3 d·wk−1 ET (n=15; 50–60 min cycling; 80% HRmax), SIT (4–10 × 30 s sprint efforts) with passive (P-SIT;n=15) or active recovery (A-SIT;n=15); or nonexercise control condition (CON;n=14). Changes in cardiorespiratory fitness, whole-body and visceral fat mass, and plasma systemic inflammation were examined.Results. Compared to CON, significant increases in interpolated power output (P-SIT,P<0.001; ET,P=0.012; A-SIT,P=0.041) and test duration (P-SIT,P=0.001; ET,P=0.012; A-SIT,P=0.046) occurred after training. Final VO2consumption was increased after P-SIT only (P<0.001). Despite >90% exercise compliance, there was no change in whole-body or visceral fat mass or plasma inflammation (P>0.05).Conclusion. In sedentary middle-aged men, SIT was a time-effective alternative to ET in facilitating conditioning responses yet was ineffective in altering body composition and plasma inflammation, and compared to passive recovery, evidenced diminished conditioning responses when employing active recovery.

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Sha, Deshang, Yaxiong Xu, Jiankun Zhang, and Yu Yan. "Current-Fed Hybrid Dual Active Bridge DC–DC Converter for a Fuel Cell Power Conditioning System With Reduced Input Current Ripple." IEEE Transactions on Industrial Electronics 64, no. 8 (August 2017): 6628–38. http://dx.doi.org/10.1109/tie.2017.2698376.

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Freitas Takami, Marcelo Hideo, Sérgio A. Oliveira da Silva, and Leonardo Poltronieri Sampaio. "Dynamic performance comparison involving grid‐connected PV systems operating with active power‐line conditioning and subjected to sudden solar irradiation changes." IET Renewable Power Generation 13, no. 4 (January 21, 2019): 587–97. http://dx.doi.org/10.1049/iet-rpg.2018.5810.

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Qian, S.-Y., and Z.-G. Ling. "The research and development of the solar house in China." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 212, no. 2 (March 1, 1998): 135–40. http://dx.doi.org/10.1243/0957650981536664.

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A brief recommendation about solar energy resources and the status of solar house research and development in China is introduced. The reasons for the slow development of an active solar house in the past is analysed. By combining with various research achievements, the passive solar house has had good advancement and applications. The demonstration transparent insulation material (TIM) solar house project in Shanghai is described as an example showing that with the development of solar material, absorbing and storage wall and air-conditioning measures, the passive and hybrid solar house has the potential to provide future wider applications in China.

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