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2021 IEEE Conference on Energy Conversion (CENCON)最新文献

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Performance of the Hybrid Photovoltaic-Thermoelectric Generator (PV-TEG) System under Malaysian Weather Conditions 马来西亚天气条件下混合光伏热电发电机(PV-TEG)系统的性能
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627257
U. A. Saleh, S. A. Jumaat, M. A. Johar, Wan Jamaluddin
This paper presents an evaluation of system performance in real atmospheric conditions for a hybrid photovoltaic-thermoelectric generator. The systems comprise a 2-unit of 100W PV panel, 196TEG modules and 92 heatsink as cooling unit for the TEG. The configuration is used to minimize the PV module temperature and improve system performance. The TEGs were mounted on a heat sink at the back side of the shingle. The hybrid system has demonstrated its potential to generate sufficient energy. The power output of the TEG was entirely dependent on the series connection and the temperature difference across the hot and cold sides of the TEG, while the PV power output is dependent on the solar radiation and effective cooling of the PV cell. This findings suggests that the hybrid system can produce better results than a PV stand-alone system in a sunny weather condition. In the sunny days of March 2021, the maximum generation capacity and efficiency were achieved with 23.65W for the system with air-based natural flow cooling than the PV alone. The findings also indicates a 13.69% increase in efficiency in sunny days, 1.75% in rainy days and 1.26% in cloudy days
本文对一种光电热电混合发电系统在实际大气条件下的性能进行了评价。该系统包括一个2单元的100W光伏面板,196TEG模块和92个散热器作为TEG的冷却单元。该配置主要用于降低光伏组件温度,提高系统性能。teg安装在瓦片背面的散热器上。这个混合系统已经证明了它产生足够能量的潜力。TEG的输出功率完全取决于串联连接和TEG冷热两侧的温差,而PV的输出功率取决于太阳辐射和PV电池的有效冷却。这一发现表明,在阳光充足的天气条件下,混合系统比单独的光伏系统产生更好的效果。在2021年3月的晴天,采用空气基自然流冷却的系统的最大发电量和效率为23.65W。研究结果还表明,晴天效率提高13.69%,雨天效率提高1.75%,阴天效率提高1.26%
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引用次数: 4
Lithium-Ion Cell Balancing Using Auxiliary Battery and DC/DC Unidirectional Converter 用辅助电池和DC/DC单向变换器平衡锂离子电池
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627298
Muhammad Hazwan Hashim, Mohd Saiful Jamaluddin, Mohd Hafidzuddin Sam Hun, M. J. Aziz, N. M. Nordin
The lithium-ion battery became commercially popular and used due to its salient characteristics such as high terminal voltage, energy density and power density of a single cell. However, if there is no proper power regulation during the process of both charging and discharging. In that case, the life span of the batteries will significantly decrease and leads to undesirable results such as fire or explosion at times. Proper power regulation is essentials, and battery management systems (BMS) are employed to circumvent these problems. SOC estimation, cell balancing, and thermal management are the common subsystems of the battery management system (BMS). This paper focuses on the cell balancing subsystem, where it is a crucial subsystem of the BMS that will efficiently prolong the battery life span. The active balancing topology used in this paper is a Single Switch Capacitor to performed module balancing and cell balancing within internal modules. The BMS is based on the pack modularization architecture, where a single capacitor is being installed for module-to-module balancing. As for internal module balancing, cells are balanced using a single capacitor with applications of Auxiliary Battery and DC/DC Unidirectional Converter for boost charging purposes. Finally, the simulation of the BMS is being modelled with MATLAB Simulink to validate the results of the implementation system.
锂离子电池因其高终端电压、能量密度和单电池功率密度等显著特性而在商业上流行和使用。但是,如果在充电和放电过程中没有适当的功率调节。在这种情况下,电池的寿命将大大减少,并导致诸如火灾或爆炸等不良后果。适当的功率调节是必不可少的,而电池管理系统(BMS)的使用可以规避这些问题。SOC评估、电池平衡和热管理是电池管理系统(BMS)的常见子系统。电池平衡子系统是电池管理系统中有效延长电池寿命的关键子系统。本文采用的有源平衡拓扑是单个开关电容,在内部模块内进行模块平衡和单元平衡。BMS基于封装模块化架构,其中单个电容器被安装用于模块到模块的平衡。至于内部模块平衡,电池使用单个电容器进行平衡,并应用辅助电池和DC/DC单向转换器进行升压充电。最后,利用MATLAB Simulink对BMS进行了仿真,验证了实现系统的结果。
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引用次数: 0
Open Fault Tolerant Method Using DPWM for Reducing Switching Loss in Three-Level Hybrid ANPC Inverter 利用DPWM降低三电平混合ANPC逆变器开关损耗的开放容错方法
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627299
Ha-Rang Jo, Youngjong Ko, Kyo-Beum Lee
This paper proposes an open fault tolerant control for reducing switching loss in a three-level Si/SiC hybrid active neutral-point clamped (HANPC) inverter. The Si/SiC hybrid ANPC inverter consists silicon (Si) switches and silicon-carbide (SiC) switches. The HANPC inverter is more economical compared to the full SiC ANPC inverter and the full SiC ANPC inverter provides the high efficiency and power density almost the same as the full-SiC ANPC inverter. The Si switches operate with the low switching frequency according to the fundamental frequency, and the SiC switches have the high switching frequency depend on the carrier-based switching methods. The HANPC inverter has two neutral-states which make the pole voltage zero. Even if one of the Si switches for generating the neutral-states has an open fault, therefore, the inverter can output the normal three-phase current with the tolerant control. When the open fault tolerant control is applied, however, the Si switches operate with the high switching frequency same as the SiC switches. As a result, the Si switches have the high switching loss and overheat. To solve this problem, the fault tolerant control using discontinuous pulse width modulation (DPWM) is proposed in this paper. The proposed method is verified through simulation results.
本文提出了一种开放式容错控制方法,用于降低三电平硅/碳化硅混合有源中性点箝位(HANPC)逆变器的开关损耗。硅/碳化硅混合ANPC逆变器由硅(Si)开关和碳化硅(SiC)开关组成。与全SiC ANPC逆变器相比,HANPC逆变器更经济,并且全SiC ANPC逆变器提供几乎与全SiC ANPC逆变器相同的高效率和功率密度。硅开关根据基频工作在低开关频率,碳化硅开关根据基于载波的开关方法工作在高开关频率。HANPC逆变器有两个中性状态,使极电压为零。因此,即使其中一个用于产生中性态的硅开关有开路故障,逆变器也可以在容限控制下输出正常的三相电流。然而,当应用开放容错控制时,Si开关以与SiC开关相同的高开关频率工作。因此,硅开关具有高的开关损耗和过热。为了解决这一问题,本文提出了采用不连续脉宽调制(DPWM)的容错控制方法。仿真结果验证了该方法的有效性。
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引用次数: 2
Zero-Sequence Circulating Current Suppression in Multi-paralleled Three-Level NPC Inverters under Unbalanced Operating Conditions 不平衡工况下多并联三电平NPC逆变器零序循环电流抑制
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627245
Jun-Hyeok Park, Kyo-Beum Lee
This paper presents methods for suppressing high-frequency (HF-) zero-sequence circulating current (ZSCC) generated by interleaved pulse width modulation (PWM) and low-frequency (LF-) ZSCC generated by inconsistent circuit parameters or inconsistent reference signals. In medium/$h$ igh power applications, three-level neutral-point-clamped (NPC) inverters are used in parallel connection to obtain high power rating. In this parallel operation, interleaved PWM is used to improve the quality of the output current with a small filter inductor. However, ZSCC increases due to the small filter inductor. The proposed methods for suppression of HF-ZSCC generated by interleaved PWM are alternative phase opposite disposition (APOD) PWM based on carrier modulation and double-reference PWM (DRPWM) based on reference signal modulation. Additionally, the method that injects an optimized zero-sequence voltage (ZSV) when LF-ZSCC is generated is added to suppress HF- and LF-ZSCC simultaneously. The ZSCC suppression performance is proved by the simulation results.
本文提出了抑制交错脉宽调制(PWM)产生的高频(HF-)零序循环电流(ZSCC)和抑制电路参数不一致或参考信号不一致产生的低频(LF-)零序循环电流的方法。在中/高功率应用中,三电平中性点箝位(NPC)逆变器并联使用以获得高额定功率。在这种并联操作中,交错脉宽调制被用来提高输出电流的质量与一个小的滤波电感。然而,由于滤波器电感小,ZSCC增加。本文提出了基于载波调制的交替相位对置PWM (APOD)和基于参考信号调制的双参考PWM (DRPWM)两种方法来抑制交错PWM产生的HF-ZSCC。此外,还增加了在产生LF-ZSCC时注入优化零序电压(ZSV)的方法,以同时抑制HF-和LF-ZSCC。仿真结果验证了ZSCC的抑制性能。
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引用次数: 2
Characterization and Optimization of Lattice-Matched InGaAs TPV Cell for Waste Heat Harvesting 晶格匹配InGaAs TPV电池余热收集的表征与优化
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627295
M. Gamel, P. Ker, H. J. Lee, M. Hannan
In0.53Ga0.47As III–V semiconductor material has attracted significant attention from thermophotovoltaic research community due to its excellent optical and electrical properties. Furthermore, a high crystal In0.53Ga0.47 As structure can be grown on a lattice-matched InP substrate, making it a suitable candidate for large-scale production. However, the predominant drawback of the cell is low conversion efficiency, and there is a lack of detailed analysis of the effect of waste heat temperatures on the cell performance. Therefore, this work aims to conduct a comprehensive analysis via optimizing the active junction and characterizing the In0.53Ga0.47 As TPV structure under different waste heat temperatures ranging from 800 to 2000 K. TCAD Silvaco software was used to simulate the output performance of the TPV cell. The simulation results were validated with the reported experimental results. Results show that the variation of base layer thicknesses significantly affect the cell performance, with a significant increase in efficiency from 6.98 to 18.2% at a radiation temperature of 1000 K, as the base thickness increased from 1 to 13 μm. For radiation's temperatures from 800 K to 2000 K, the efficiencies of the optimized TPV cells increased by more than 10% as compared to the reference structure. The results obtained from this study contribute to the understanding of the effects of various waste heat temperatures on the performance of In0.53Ga0.47 As TPV cell, as well as to provide useful guidelines to fabricate high-performance In0.53Ga0.47As TPV cell for various waste heat temperatures.
In0.53Ga0.47As III-V半导体材料因其优异的光学和电学性能而受到热光伏研究界的极大关注。此外,可以在晶格匹配的InP衬底上生长出高晶体In0.53Ga0.47 As结构,使其成为大规模生产的合适候选人。然而,该电池的主要缺点是转换效率低,并且缺乏对废热温度对电池性能影响的详细分析。因此,本工作旨在通过优化有源结和表征不同余热温度(800 - 2000 K)下In0.53Ga0.47 As TPV结构进行综合分析。采用TCAD Silvaco软件模拟TPV电池的输出性能。仿真结果与实验结果相吻合。结果表明,基材厚度的变化对电池的性能有显著影响,当基材厚度从1 μm增加到13 μm时,在辐射温度为1000 K时,电池的效率从6.98提高到18.2%。当辐射温度从800 K到2000 K时,优化后的TPV电池的效率比参考结构提高了10%以上。本研究的结果有助于了解不同余热温度对In0.53Ga0.47As TPV电池性能的影响,并为在不同余热温度下制备高性能In0.53Ga0.47As TPV电池提供有用的指导。
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引用次数: 0
Analysis of Droop Control for Emulating Grid Synchronization Mechanism 仿真网格同步机构的下垂控制分析
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627281
Ronald Jackson, S. A. Zulkifli, Muhamed Benbouzid, S. Salimin, M. H. Khan, G. Elhassan
This paper presents a comparative analysis of grid synchronization techniques for grid-connected power converters. The current paradigm in the power distribution system is the penetration of power inverters into the existing grid network. The analysis has been done through a comparative study method between the synchronous generator-droop control technique and the phase-locked loop (PLL). The main objective is to prove that droop control can emulate the conventional synchronization technique, PLL. The MATLAB simulation results have been provided to verify the studies.
本文对并网变流器的并网同步技术进行了比较分析。目前配电系统的模式是将逆变器插入现有的电网中。通过同步发电机下垂控制技术与锁相环(PLL)控制技术的对比研究方法进行了分析。主要目的是证明下垂控制可以模拟传统的同步技术锁相环。给出了MATLAB仿真结果来验证研究结果。
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引用次数: 0
Stability Analysis in a Grid-interactive Residential Nanogrid Using Markov Chains 基于马尔可夫链的网格-交互住宅纳米网格稳定性分析
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627253
Ahmed Tijjani Dahiru, Chee Wei Tan, Abba Lawan Bukar, K. Y. Lau, C. L. Toh, S. Salisu
Statistical tools are useful in analyzing the longterm techno-economic implications in system designs. Methods such as Monte Carlo simulations and Decision Tree were applied in renewable energy system analysis due to the stochastic parameters involved. However, the methods were cumbersome and data-intensive that required lots of empirical data. Assumptions such as scenario generation in providing the required data affect quality and speed of Monte Carlo implementations. While Decision Tree tends to be cumbersome and time consuming when involved in large transitions. This paper proposed a Markov Chains method to analyze the operational stability in a photovoltaic/wind/battery residential nanogrid interacting with main grid. The proposed method only required simple states' transition probabilities that form Markovian matrices. The simulated Markovian matrices hence produced probabilistic information with several options interpreted in decision making. Results obtained indicated Markovian matrices derived from transition probabilities in nanogrid's autonomous operations and main grid interactions produced steady-state probability ratios 0.5:0.5, 0.4667:0.5333, 0.4286:0.5714, and 0.3846:0.6154. The probabilistic information indicated that the nanogrid was able to achieved 38.46-61.54% autonomy range in the lifetime analysis. The Markov Chains' performance in the nanogrid/main grid energy trade-offs is envisaged to be improved by considering each transition state supplementing one another.
统计工具在分析系统设计中的长期技术经济影响方面是有用的。由于可再生能源系统的参数是随机的,所以采用蒙特卡罗模拟和决策树等方法进行系统分析。然而,这些方法繁琐且数据密集,需要大量的经验数据。提供所需数据的场景生成等假设会影响蒙特卡罗实现的质量和速度。而当涉及到大型转换时,决策树往往是繁琐和耗时的。本文提出了一种马尔可夫链方法来分析光伏/风能/电池住宅纳米电网与主电网相互作用时的运行稳定性。所提出的方法只需要简单状态的转移概率形成马尔可夫矩阵。模拟的马尔可夫矩阵因此产生了在决策中解释的几种选项的概率信息。结果表明,由纳米网格自主运行和主网格相互作用中的转移概率推导出的马尔可夫矩阵产生的稳态概率比分别为0.5:0.5、0.4667:0.5333、0.4286:0.5714和0.3846:0.6154。概率信息表明,纳米网格在寿命分析中能够达到38.46 ~ 61.54%的自治范围。马尔可夫链在纳米电网/主电网能量权衡中的性能可以通过考虑每个过渡状态相互补充而得到改善。
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引用次数: 0
Energy Management Strategy and Capacity Planning of an Autonomous Microgrid: A Comparative Study of Metaheuristic Optimization Searching Techniques 自主微电网的能量管理策略与容量规划:元启发式优化搜索技术的比较研究
Pub Date : 2021-10-25 DOI: 10.1109/CENCON51869.2021.9627311
Abba Lawan Bukar, Chee Wei Tan, K. Y. Lau, C. L. Toh, R. Ayop, Ahmed Tijjani Dahiru
Electricity generation using renewable energy-based microgrid (REM) is a prerequisite to achieve one of the cardinal objectives of sustainable development goals. Nonetheless, the optimum design and sizing of the REM is challenging. This is because the REM needs to supply the fluctuating demand considering the sporadic behaviour of the renewable energy sources (RES). This paper, therefore, proposes a nature-inspired metaheuristic optimization searching technique (MOST) to optimize the components of an autonomous microgrid integrating a diesel generator ${left(D_{text{GEN}}right)}$, battery bank, photovoltaic and wind turbine. In this regard, a cycle-charging energy management scheme (CEMS) control is proposed and implemented using a rule-based algorithm. The proposed CEMS provide a power delivery sequence for the different components of the microgrid. Subsequently, the CEMS is optimized using the metaheuristic optimization searching techniques (MOSTs). To benchmark, the paper compares the success of six different MOSTs. The simulation is performed for the climatic conditions of Yobe State, in northern Nigeria using MATLAB software. The comparative results show that the grasshopper optimization algorithm is found to yield a better result because it gives the least fitness function relative to other studied MOSTs. Remarkably, it outperforms the grey wolf optimizer, the ant lion optimizer, and the particle swarm optimization by ~ 3.0 percent, ~ 5.8 percent, and ~ 3.6 percent (equivalent to a cost savings of $8332.38, $4219.87, and $5144.64 from the target microgrid project). Results also indicate that the proposed CEMS adopted for the microgrid control strategy has led to the implementation of a clean and affordable energy system, as it's significantly minimized CO2 (by 92.3%), fuel consumption (by 92.4%), compared fossil fuel-based ${D_{text{GEN}}}$.
利用基于可再生能源的微电网发电是实现可持续发展目标的先决条件之一。然而,REM的最佳设计和尺寸是具有挑战性的。这是因为考虑到可再生能源(RES)的零星行为,REM需要提供波动的需求。因此,本文提出了一种受自然启发的元启发式优化搜索技术(MOST),以优化由柴油发电机${left(D_{text{GEN}}right)}$、电池组、光伏和风力涡轮机组成的自主微电网的组件。为此,提出了一种循环充电能量管理方案(CEMS),并采用基于规则的算法实现。所提出的CEMS为微电网的不同组成部分提供了一个电力输送顺序。随后,利用元启发式优化搜索技术(MOSTs)对CEMS进行优化。作为基准,本文比较了六种不同的most的成功。利用MATLAB软件对尼日利亚北部约贝州的气候条件进行了模拟。对比结果表明,相对于其他已研究的最优算法,蚱蜢优化算法给出的适应度函数最小,从而获得了更好的结果。值得注意的是,它比灰狼优化器、蚂蚁狮子优化器和粒子群优化器分别高出3.0%、5.8%和3.6%(相当于从目标微电网项目中节省了8332.38美元、4219.87美元和5144.64美元)。结果还表明,与基于化石燃料的${D_{text{GEN}} $相比,用于微电网控制策略的拟议CEMS导致了清洁和负担得起的能源系统的实施,因为它显着减少了二氧化碳(减少92.3%),燃料消耗(减少92.4%)。
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引用次数: 0
期刊
2021 IEEE Conference on Energy Conversion (CENCON)
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