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Author(s):
Yang Jie, Yang Jie, Zhang Jing, Sun Xinyi, Zhang Yingnan, Zheng Decong.
Page No : 1-9
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Protected: OPTIMIZATION OF PROCESS PARAMETERS OF BUCKWHEAT STRAW SEEDLING BOXING BASED ON MOPSO
Abstract
Abstract: Response surface methodology （RSM） is used to study the relationship between three physical properties of biomass seedling pot density, drop breakage rate and pressure breakage rate of buckwheat straw and molding pressure, dosage of binder and holding time. MOPSO optimization algorithm is used to carry out three response optimization analysis of process parameters. The experimental results show that when the pressure is 8-12 MPa, the amount of binder is 60%-90%, and the pressure holding time is 11-14 min, the seedling pot density can reach above 1.041 g/cm3, and the drop damage rate and pressure damage rate are below 2.97% and 2.65%, respectively. When the optimal molding parameters are pressure 11.73 MPa, binder dosage 60.5% and holding time 12.7 min, the seedling pot density reaches 1.168 g/cm3, and the drop damage rate are 2.52% and 2.58%, respectively.
Key words: biomass, optimization, physical properties, straw seedling pot, MOPSO
摘要： 采用响应面法研究荞麦秸秆生物质育苗钵密度、跌落破损率和承压破损率3个物理性能与成型压力、粘结剂用量及保压时间的关系,并应用多目标粒子群优化（MOPSO）算法对工艺参数进行三响应优化分析。试验结果表明：当压力为8~12 MPa、粘结剂用量为60%~90%、保压时间为11~14 min 时,育苗钵密度可达1.041 g/cm3以上,跌落破损率和承压破损率分别在2.97%和2.65%以下。最优成型工艺参数为压力11.73 MPa,粘结剂用量60.5%,保压时间12.7 min,此条件下育苗钵密度达到1.168 g/cm3,跌落破损率和承压破损率分别为2.52%和2.58%。
关键词: 生物质, 优化, 物理性能, 秸秆育苗钵, 多目标粒子群优化算法
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Author(s):
Yang Libin, Yu Kun, Zeng Xiangjun, Li Li, Wang Fuheng.
Page No : 1-10
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Protected: ARC SUPPRESSION AND LINE SELECTION METHOD FOR DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATION BASED ON INJECTION CURRENT REGULATION
Abstract
ARC SUPPRESSION AND LINE SELECTION METHOD FOR DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATION BASED ON INJECTION CURRENT REGULATION
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Author(s):
Pan Xiaotian, Pan Xiaotian, Zhong Zhaoping, Wang Wei, Zheng Xiang, Shen Zhaocheng, Deng Yue.
Page No : 10-16
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Protected: ENVIRONMENTAL IMPACT ASSESSMENT OF GASIFICATION SYNTHESIS OF DIFFERENT BIOMASS FOR PRODUCTION OF JET FUEL
Abstract
Abstract: The life cycle assessment method was used to evaluate the environmental impact of the gasification synthesis for the production of jet fuel from three types of biomass： maize stover, rice husk and poplar wood. Six types of environmental impacts, including global warming, acidification, eutrophication, photochemical ozone formation, human toxicity and solid waste, were selected to calculate the potential environmental impact of the three processes over their entire life cycles. The calculation results show that highest CO2 emissions in the production phase throughout the life cycle, with emission accounting for 69.13%-74.36%; minimal environmental impact during the transport phase, with each environmental impact potential accounting for less than 7%; maize stover is with the lowest environmental impact among the three biomass, and reducing the power consumption of the Fischer-Tropsch reactor can reduce the environmental impact of the maize stover process.
Key words: biomassenergy, life cycle, environmental impact, jet coal, gasification synthesis, inventory analysis
摘要： 采用生命周期评价方法对玉米秸秆、稻壳和杨木3种生物质的气化合成航空煤油工艺路线进行环境影响评价。选取全球变暖、酸化、富营养化、光化学污染、人体毒性和固体废弃物6种环境影响类型,对3种工艺路线的全生命周期进行环境影响潜值计算。计算结果表明：系统全生命周期中生产阶段排放最多的是CO2,占比为69.13%~74.36%;运输阶段环境影响最小,在各环境影响潜值中占比不足7%;玉米秸秆是3种生物质中环境影响最小的原料,减少费托合成反应器的耗电量可降低玉米秸秆工艺的环境影响。
关键词: 生物质能, 生命周期, 环境影响, 航空煤油, 气化合成, 清单分析
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Author(s):
Wang Daoguang, Wang Daoguang, Zhao Xing, Zhang Puyang.
Page No : 17-22
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Protected: EXPERIMENTAL STUDY ON TOWING BEHAVIOR OF BUCKET FOUNDATION PLATFORM
Abstract
Abstract: The towing process of bucket foundation platform under the condition of damaged middle compartment is experimentally studied. The motion behavior of the structure during the damaged sinking process and the inflated raising process is analyzed. The towing stability of the structure under different speed conditions is compared. The effects of the damage of the middle compartment and different speeds on the towing process of the structure are obtained. The test results show that the damage of the middle compartment has little impact on the towing stability of the bucket foundation platform. Therefore, the bucket foundation platform can be optimized, that is, the middle compartment of the foundation can be connected with the atmosphere to obtain better sinking effect.
Key words: offshore wind power, bucket foundation, damage of middle compartment, towing stability
摘要： 针对筒基平台在中舱破舱情况下的静水拖航过程进行试验研究,分析破舱下沉及打气上浮过程中结构的运动性态,并对比不同航速条件下结构的拖航稳性,得到了中舱破舱情况及不同航速对结构拖航过程的影响。试验结果表明,中舱破舱对筒基平台的拖航稳性影响较小,因此可对结构进行优化,即将基础中舱与大气连通,以获得更好的下沉效果。
关键词: 海上风电, 筒型基础, 中舱破舱, 拖航稳性
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Author(s):
Zhou Yang, Zhou Yang, Chen Jiachao, Zhang Junbiao, Song Zekun, Pan Yun, Yan Donghao.
Page No : 23-29
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Protected: ANALYSIS ON CHARACTERISTICS OF MEASURED LARGE WAVES IN SEAS ADJACENT TO ZHEJIANG
Abstract
Abstract: The wave characteristics under extreme weather conditions in the nearshore waters of Sanmen Bay in Zhejiang Province are presented based on field observation, and the differences between typhoon wave and cold wave are investigated. The observed wave parameters during typhoon and cold snap are analyzed by statistical analysis and regression analysis, and the variations of wave parameters and wave spectra during large wave processes are discussed. 5 typhoon wave processes and 1 cold wave process are observed during the whole year. The results show that when the low frequency swells are in a dominant position, the wave height has little correlation with the wind speed. However, when the high frequency wind seas are relatively large, the wave height and wind speed change synchronously. The sea waves during typhoons are mixed waves consisting of swells and wind seas. The wave spectra are mainly double-peaked, and there are also single-peaked spectra and multi-peaked spectra. The large waves during the cold snap are wind seas, and the wave spectra are mainly single-peaked.
Key words: typhoon wave, cold wave, regression analysis, wave spectrum, wind sea, swell
摘要： 采用现场测量方法分析浙江近岸海域在极端天气条件下的大浪特征,比较分析台风浪和寒潮大浪的差异,对台风浪和寒潮大浪过程的波参数进行统计分析、回归分析,结合风资料探讨波参数与谱变化特性,1年内共观测到5次台风浪过程和1次寒潮大浪过程。研究表明：涌浪作用较大时,波高和风速几乎无相关性;当风浪作用达到一定程度时,波高和风速呈同步变化趋势;研究海域的台风浪为区域内风浪和外海涌浪组成的混合浪,单峰谱、双峰谱和多峰谱为其波浪谱型,双峰谱最多;寒潮大浪过程为典型的风浪过程,其谱型为单峰谱。
关键词: 台风浪, 寒潮大浪, 回归分析, 波浪频谱, 风浪, 涌浪
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Author(s):
Ma Jiuchen, Ma Jiuchen, Lyu Linhai, Yang Jie, Cui Afeng, Wei Fan.
Page No : 30-39
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Protected: NUMERICAL SIMULATION OF FLUID SEEPAGE AND HEAT TRANSFER IN AQUIFER WITH LBM-MFLS COUPLED MODEL
Abstract
Abstract: Taking the multiple moving finite line heat sources（MFLS） operation mode as the research object, the unsteady state analytical solutions of the excess temperature in aquifer ΔTMFLS are obtained by applying space-time superposition principle, based upon the transient moving finite line heat source model. A calculation model coupled lattice Boltzmann method （LBM） and ΔTMFLS is established, according to introduce the discrete force source term into the Lattice Bhatnagar-Gross-Krook （LBGK） evolution equation of the velocity distribution function. The coupled model and the calculation method are validated by the data determined from the in-situ thermal re-sponse test. The results show that coupled LBM-ΔTMFLS simulation can well reproduce the evolution process of seepage velocity in aquifer which presents four successive stages of starting, declining, rising and stabilizing. With the decreasing of the porosity of aquifer, the movement space of virtual fluid particles reduces, consequently the collision probability of inter-particles and between particles and porous media increases, which leads to the kinetic energy loss enhancing, the descend range of seepage velocity increasing, and the recovery process retarding. While the inflow velocity increases, however, the influence degree of porosity on the hydrodynamic evolution of aquifer weakens. Meanwhile the directivity of the heat transport process in the aquifer enhances significantly.
Key words: geothermal energy, heat transfer, porous media, numerical models, aquifers, lattice Boltzmann method
摘要： 基于有限长移动线热源（MFLS）传热模型,根据时空叠加原理推导出含水层非稳态过余温度解析解ΔTMFLS;在格子单松弛模型（LBGK）的演化方程中引入离散力源项,建立格子Boltzmann法（LBM）与ΔTMFLS的耦合计算模型。通过热响应实验,验证耦合计算模型与求解方法的正确性。研究表明,在不同计算工况下含水层各区域的渗流速度均具有启动—下降—回升—稳定的4个连续阶段。随着含水层孔隙率的降低,虚拟流体粒子动能损失增大,渗流速度降幅增大,回升过程缓慢。然而随着进水流速的提高,孔隙率的变化对于含水层水动力场演化过程的影响程度减弱;含水层热量运移过程的方向性显著增强。
关键词: 地热能, 传热, 多孔介质, 数值模型, 含水层, 格子Boltzmann方法
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Author(s):
Wu Qingfeng, Yang Kaiyi, Yu Shaojuan, Liu Liqun, Chen Yutong, Dong Jia.
Page No : 40-47
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Protected: ACTIVE SOH COOPERATIVE CONTROL SCHEME OF MICROGRID ENERGY STORAGE SYSTEMS BASED ON NO-COMMUNICATION
Abstract
Aiming at the problem that the traditional P-f droop control cannot achieve the state of health （SOH） balance of distributed battery energy storage systems （DBESS） in the AC microgrid, this paper proposes an active SOH cooperative control scheme for DBESS in the microgrid based on no communication. The scheme studies the mechanism of droop control to adjust SOH, and adds the depth of discharge （DOD） information of DBESS to the traditional droop control, so that DBESS can translate the droop curve according to the SOH state, adjust the output active power of DBESS inverter, and realize the SOH cooperative control between DBESS groups. A small signal model is established to analyze the influence of control parameters on system stability. This scheme is an active control scheme, which has the advantages of no communication and shunt resistance and low cost. The feasibility and effectiveness of the proposed strategy are verified by simulation model and experimental platform.
Key words: battery pack, microgrids, decentralized control, state of health, cooperative control, depth of discharge
摘要： 针对传统有功功率-频率（P-f）下垂控制无法实现交流微电网内分布式电池储能系统（DBESS）健康状态（SOH）均衡问题,提出一种基于无通讯的微电网DBESS主动SOH协同控制方案。该方案研究下垂控制调节SOH机理,将DBESS放电深度（DOD）信息加入传统下垂控制,使DBESS能根据SOH状态平移下垂曲线,调节DBESS逆变器输出有功功率,实现DBESS组间SOH 协同控制。建立小信号模型分析控制参数对系统稳定性的影响。该方案属于主动控制方案,具有无通讯和分流电阻、造价低的优点。通过仿真模型和实验平台对所提策略的可行性和有效性进行验证。
关键词: 电池组, 微电网, 分散控制, 健康状态, 协同控制, 放电深度
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Author(s):
Yang Xueming, Yang Xueming, Tao Jiawei, Meng Fanxing, Li Chunbo .
Page No : 48-58
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Protected: MOLECULAR DYNAMICS STUDY ON THERMOPHYSICAL PROPERTIES OF Li2CO3/Na2CO3/K2CO3 AND THEIR MIXED MOLTEN SALT FOR HEAT STORAGE
Abstract
Abstract: Molecular dynamics （MD） simulations of density, specific heat capacity, viscosity and thermal conductivity of Li2CO3/Na2CO3/K2CO3 and its binary and ternary mixed molten salts were carried out and compared with the experimental results. The simulation results are in good agreement with the existing experimental data and simulation values. The results show that with the increasing of temperature, the density decreases and the distance between ions increases, which lead to the decrease of resistance to shear stress, indicating the negative temperature dependence of viscosity of the single-component, binary and ternary molten salts. For the thermal conductivity of molten salt, the single-component and the binary molten salt also show a negative temperature dependence, while the ternary molten salt tends to increase with the increase of temperature.
Key words: solar thermal power generation, carbonate, molecular dynamics, molten salt, specific heat, viscosity, thermal conductivity
摘要： 对Li2CO3/Na2CO3/K2CO3及其二元和三元混合熔融盐的密度、比热容、黏度、热导率进行分子动力学模拟（MD）,对比得出模拟结果与现有的实验数据和模拟值相近。结果表明：随着温度的升高,密度逐渐减小,离子之间的距离增加,导致对剪切应力的抵抗力变小,这说明单组分、二元和三元熔融盐黏度的负温度依赖性。对于熔融盐的热导率,单组分和二元熔融盐也呈现出负温度依赖性,而三元熔融盐趋势是随温度的升高呈上升状态。
关键词: 太阳能热发电, 碳酸盐, 分子动力学, 熔融盐, 比热, 黏度, 热导率
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Author(s):
Cheng Zhijiang, Cheng Zhijiang, Tian Feng, Yang Handi, Yang Tianxiang.
Page No : 59-66
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Protected: MODEL PREDICTIVE OPTIMAL CONTROL STRATEGY FOR MODULAR MULTILEVEL HYBRID CONVERTER BATTERY ENERGY STORAGE SYSTEM
Abstract
Abstract: Based on MMHC-BESS and combining MPC algorithm with duty cycle modulation idea, a model predictive optimal control strategy is proposed, which can effectively reduce the computational burden of the system. The control strategy uses the MPC algorithm to realize the power control, deduces the optimal output voltage through the discrete model of the converter, and uses the carrier phase shift modulation method to realize the switching signal output. At the same time, considering the voltage imbalance of the power grid, the MPC algorithm is used to suppress the negative sequence current and power fluctuation, which has a good ability of redundant fault-tolerant operation. Finally, the effectiveness and feasibility of the proposed control method are verified by the simulation model.
Key words: model predictive control, optimal control, battery energy storage system, MMHC-BESS, redundant fault tolerant control
摘要： 基于MMHC-BESS,将MPC算法与占空比调制思想结合,提出一种可有效减小系统计算负担的模型预测优化控制策略。控制策略利用MPC算法实现功率控制,通过变换器的离散模型反推出最优输出电压,采用载波移相调制方法实现开关信号输出。同时考虑电网电压不平衡状况,利用MPC算法对负序电流及功率波动进行抑制,具备较好的冗余容错运行能力。最后通过仿真模型验证了所提控制方法的有效性和可行性。
关键词: 模型预测控制, 优化控制, 电池储能系统, MMHC-BESS, 冗余容错控制
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Author(s):
Chen Ji, Chen Ji, Yuan Shouli, Liu Zhien.
Page No : 67-73
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Protected: TEMPERATURE CONTROL OF PEMFC BASED ON BAS IMPROVED PSO ALGORITHM
Abstract
Abstract: Effective proton exchange membrane fuel cell（PEMFC）thermal management is one of the key factors that improve the reliability and durability of fuel cell batteries. This article controls the temperature of the electric stack by controlling the duty cycle of the fan. In the control method, the method for improving the PSO optimization fuzzy PID control; the temperature model that is finally built by Matlab / Simulink is simulated： the method can effectively solve the time-variables, large lag and uncertainty of PEMFC temperature control. A strong coupling problem makes a decrease of 57% relative to traditional PID control overdrawl, and the response time is shortened to 27.8%, and the response speed is fast, robust, and less than a small control effect.
Key words: particle swarm optimization, thermal management, fuzzy control, PID control, PEMFC
摘要： 有效的质子交换膜燃料电池（PEMFC）热管理是提升其可靠性和耐久性的关键因素之一,该文通过控制PWM占空比来控制散热强度进而控制电池温度。在控制策略上,选用经改进的粒子群算法优化的模糊PID作为控制器,最后经Matlab/Simulink搭建的电堆温度模型仿真表明：该方法能有效解决PEMFC温度控制时变量多、强耦合的难题,使相对于传统的PID控制超调量下降57%,响应时间缩短27.8%,取得了响应速度快、超调小和鲁棒性强的控制效果。
关键词: 粒子群算法, 热管理, 模糊控制, PID控制, 质子交换膜燃料电池
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Author(s):
Wu Shengwei, Wu Shengwei, Fu Lirong, Liu Jinyi, Gong Penghua, Zhang Xiaosong, Liu Weifeng.
Page No : 74-79
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Protected: MASS TRANSFER SIMULATION AND PERFORMANCE STUDY OF PEMFC WITH NEW EXTENDED FLOW CHANNEL
Abstract
Abstract: A new flow channel with an extended area is proposed in this paper. The length of the extended area is 1, 2, and 4 mm, respectively. A three-dimensional isothermal steady-state model is established by COMSOL software. The results demonstrate that the performance of PEMFC with the novel flow channel is superior to that with the traditional straight channel. And the optimal extended length is 2 mm. At high current density, the extended channel can contribute to more uniform oxygen distribution and improve the removal of water. Increasing the number of extended areas after determining the optimal extended length will enhance fuel cell performance even more. The channel with double extended regions can increase the peak power density of PEMFC by 18.44% when compared to the traditional straight channel.
Key words: hydrogen energy, PEMFC, optimal design, numerical simulation, extend flow channel
摘要： 该文提出一种带有拓展区域的新型PEMFC流道,拓展区域长度分别设计为1、2和4 mm。采用COMSOL软件建立三维等温稳态模型并进行数值计算。结果表明：新型拓展流道PEMFC性能均优于传统直流道PEMFC,其最佳拓展长度为2 mm。在高电流密度下,拓展流道使氧气分布更加均匀,提升水的去除能力。当取最佳拓展长度时,增加拓展区域数量能进一步提升燃料电池性能,与传统直流道相比,双拓展区域的流道使PEMFC峰值功率密度提高了18.44%。
关键词: 氢能, 质子交换膜燃料电池, 优化设计, 数值模拟, 拓展流道
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Author(s):
Kuang Huizi, Li Wei, Wang Xu, Xu Ye, Liu Kaicheng, Tan Junyuan.
Page No : 80-87
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Protected: RESEARCH ON COMBINED SIMULATION AND OPTIMIZATION OF COOLING, HEATING AND POWER SYSTEM WITH SOLAR ENERGY
Abstract
Accurate architecture-load prediction and equipment-output calculation are the key to realize the operation optimization of integrated energy system. In this paper, the procedure of “load prediction-device simulation-software simulation-collaborative optimization” was firstly designed. Secondly, DeST software was used to predict the cooling and heating load and PVsyst software was exploited to calculate the photovoltaic power. Next, the power output of gas turbine was estimated by aid of simulation model. Finally, the obtained results based on above three processes were incorporated into pre-established operation optimization model in order to generate reasonable and efficient energy-provision scheme. Compared with traditional optimization model, the schedule pattern based on integrated method was beneficial to achieve balance between energy supply and demand, also was capable of providing a good demonstration for the operation and management of other similar systems.
Key words: solar energy, gas turbine, load forecasting, CCHP, device simulation, integrated modelling
摘要： 遵循“负荷预测-机理仿真-软件模拟-协同优化”的技术路线,在运用DeST软件预测上海某酒店全年逐时冷、热负荷、PVsyst软件计算光伏发电量和构建燃气轮机仿真模型计算能源输出的基础上,将上述计算结果输入预先构建的太阳能“冷-热-电”联供系统运行优化模型中,得到合理、可行的系统供能方案。相较于传统优化模型,运用集成方法得到的调度方案更有利于实现能源供需平衡,可为其他类似系统的运行和管理提供很好的示范。
关键词: 太阳能, 燃气轮机, 负荷预测, CCHP, 设备仿真, 集成建模
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Author(s):
Sekkal Mohammed Chakib, Ziani Zakarya, Meliani Sidi Mohammed.
Page No : 88-103
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Protected: COMPARATIVE ANALYSIS AND OPTIMIZATION OF WIND TURBINE PERFORMANCE: A CASE STUDY IN NAAMA, ALGERIA
Abstract
In our work, we conducted a comprehensive analysis comparing the experimental results with the modeled performance of a wind turbine located in the Naaama site in Algeria. Our primary objective was to evaluate the effectiveness and accuracy of the model in predicting the behavior of the wind turbine under real-world conditions.
To begin, we calculated the wind speed variations throughout the year at the Naaama site. This involved collecting meteorological data and employing mathematical calculations to determine the average and fluctuation patterns of wind speeds. Simultaneously, we carried out practical measurements of the power output using an actual wind turbine installed at the Naaama Center University, specifically the Salhi Ahmed facility.
Next, we employed a sophisticated program to model and simulate various physical parameters associated with the wind turbine. This encompassed factors such as blade length, turbine height, rotor diameter, and generator efficiency, among others. By inputting the meteorological data and the turbine's specifications into the program, we obtained a simulated performance profile of the wind turbine under different wind conditions.
To validate the accuracy of the model, a second set of experiments was conducted in the laboratory. These experiments involved subjecting the wind turbine to controlled wind speeds and comparing the obtained results with the model's predictions. The outcomes of this test indicated a close alignment between the experimental and modeled data, reinforcing the reliability of the model.
Additionally, we explored the optimization of the wind turbine design by investigating the ideal radius and the number of blades. Through extensive analysis and simulations, we evaluated various combinations of blade lengths and numbers to determine their impact on the turbine's performance. This endeavor aimed to enhance the overall efficiency and electricity production capacity of the wind turbine.
The results obtained from the Naaama site exhibited a significant level of satisfaction regarding the electricity production capabilities of wind farms. The comparison between the experimental and modeled data showcased a high degree of correlation, affirming the validity of the model and its potential applicability in other wind energy projects.
Overall, our work involved a thorough examination of the wind turbine's performance through a combination of experimental measurements, mathematical modeling, and simulation techniques. The findings contribute to the ongoing efforts to harness renewable energy sources, particularly wind power, for sustainable electricity generation.
摘要： 在我的工作中，我进行了一项综合分析，比较了位于阿尔及利亚的纳马（Naaama）站点的实验结果与风力发电机的建模性能。主要目标是评估模型在真实环境条件下预测风力发电机行为的有效性和准确性。
首先，我计算了纳马站点一年中的风速变化。这涉及收集气象数据，并进行数学计算，以确定风速的平均值和波动模式。同时，我利用安装在纳马大学萨利阿赫迈德中心的实际风力发电机进行功率输出的实际测量。
接下来，我使用先进的程序对与风力发电机相关的各种物理参数进行建模和模拟。这包括叶片长度、涡轮高度、转子直径和发电机效率等因素。通过将气象数据和涡轮规格输入程序，我得到了在不同风力条件下风力发电机的模拟性能概况。
为了验证模型的准确性，进行了第二组实验，这些实验涉及将风力发电机置于控制风速下，并将实验结果与模型的预测进行比较。这些测试的结果显示实验和模拟数据之间存在密切的一致性，证实了模型的可靠性。
此外，我还研究了风力发电机设计的优化，通过调查理想的半径和叶片数量来实现。通过广泛的分析和模拟，我评估了不同叶片长度和数量的组合对涡轮性能的影响。这项工作旨在提高风力发电机的整体效率和发电能力。
纳马站点的结果显示，人们对风力发电场的电力生产能力非常满意。实验和模拟数据之间的比较显示了很高的相关性，证明了模型的有效性及其在其他风能项目中的潜在适用性。
总的来说，我的工作通过实验测量、数学建模和仿真技术的结合，对风力发电机的性能进行了全面的研究。这些发现为利用可再生能源，特别是风能，进行可持续电力生产的不断努力做出了贡献。
| 14 |
Author(s):
Li Hong, Lin Lanxin, Zhao Xiaojun.
Page No : 104-119
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Protected: LOW CARBON ECONOMIC SCHEDULING OF ELECTRICITY-GAS-HEAT INTEGRATED ENERGY SYSTEM BASED ON DEMAND-SIDE USER RESPONSE ANALYSIS
Abstract
Abstract: In order to give full play to the interaction potential of both sides of supply and demand under the background of low-carbon economy,a bi-level low-carbon economy scheduling model of electricity-gas-heat integrated energy system（EGH-IES） considering integrated demand response（IDR） and carbon trading mechanism is proposed.Firstly,an IDR model considering the self-characteristics,coupling characteristics and load rebound effect of multi-energy loads and a comprehensive benefit model of weighing economic benefit,response mode and energy preference of users are proposed.Based on this,a bi-level optimal scheduling model is established. The upper model is the EGH-IES low-carbon economic optimal scheduling including the carbon trading mechanism based on rewards and punishments,and the lower model is IDR strategy. Then, the bi-level model is converted into a mixed integer linear programming problem by Karush-Kuhn-Tucker（KKT） condition, duality theorem and linearization method. Finally, the example analysis shows that considering carbon trading mechanism and multiple load characteristics can promote the joint optimization of supply and demand sides,and give full play to the low carbon economy of EGH-IES.
Key words: wind power, optimization, mathematical models, demand side management, electricity-gas-heat integrated energy system, carbon trading mechanism, load characteristics
摘要： 在低碳经济的背景下,为充分发挥供需双侧的互动潜力,提出一种考虑综合需求响应（IDR）和碳交易的电-气-热综合能源系统（EGH-IES）双层低碳经济调度模型。首先,提出考虑多能负荷自身特性、耦合特性和反弹效应的IDR模型和用户权衡经济效益、响应方式和用能偏好的综合效益模型。基于此,建立上层模型为引入奖惩阶梯型碳交易机制的EGH-IES低碳经济调度,下层模型为IDR策略的双层优化调度模型。然后,通过Karush-Kuhn-Tucker（KKT）条件、对偶定理和线性化方法将双层模型转换为混合整数线性规划问题进行求解。最后,算例分析表明,综合考虑碳交易和多元负荷特性能促进供需双侧的联合优化,充分发挥EGH-IES的经济低碳性。
关键词: 风电, 优化, 数学模型, 需求侧管理, 电-气-热综合能源系统, 碳交易机制, 负荷特性
| 15 |
Author(s):
Ziani Zakarya, Taleb Ihsen Yasser, Ghellai Nacera.
Page No : 110-117
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Protected: Enhancing Performance of a Nitride-Infused MQWEL PIN Photodiode Device through Optimization
Abstract
1. Abstract
A new consideration of new devices have prospect for solar and photodiodes applications for various stoichiometric parameters. Because can combine the materials to obtain alloys in various energy gap. Our simulation based SILVACO TCAD [1]. After give a good the stoichiometric parameter that must use to achieve high quantum efficiency injection current and spectral responsivity for different active layers. Following this, in the first part, we create a new structure with different graduate InGaN layers focusing particularly on semiconductor GaN.
In a second step, we will write methods of Simulation with silvaco with variation optic proprieties, stoichiometric proprieties and graduate layers. The results show that the InGaN photodiode has high responsivity compared to literature.
Keywords: nitride of element III, semiconductors GaN, structure zinc blend, Photodiode, optimization
摘要
对于各种化学计量参数，新设备的考虑在太阳能和光电二极管应用方面具有前景。因为可以将材料组合以获得不同能隙的合金。我们的模拟基于 SILVACO TCAD [1]。在确定必须使用的化学计量参数以实现高量子效率注入电流和不同活性层的光谱响应之后，首先我们创建了一个具有不同渐变 InGaN 层的新结构，特别关注半导体 GaN。
在第二步中，我们将介绍使用 Silvaco 进行模拟的方法，包括光学特性、化学计量特性和渐变层的变化。结果显示，与文献相比，InGaN 光电二极管具有较高的响应度。
关键词：III族氮化物、GaN半导体、锌刚石结构、光电二极管、优化
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Author(s):
He Hongsheng, Li Chun, Wang Bo, Li Shujun, Zhang Li.
Page No : 118-127
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Protected: MOLECULAR DYNAMICS STUDY ON THERMOPHYSICAL PROPERTIES OF Li2CO3/Na2CO3/K2CO3 AND THEIR MIXED MOLTEN SALT FOR HEAT STORAGE
Abstract
Abstract: In order to study the dynamic response of different floating wind farm platforms with offshore wind turbine under the combined action of wind, wave and current, 2×2 array floating wind farms based on OC3-Hywind Spar and ITI Energy Barge platform are established respectively. Combined with radiation and diffraction theory and finite element method, the hydrodynamic and aerodynamic loads are calculated by ocean engineering software AQWA and wind turbine simulation software FAST respectively, and the time-frequency response characteristics of the two floating wind farm platforms are analyzed. The results show that the frequency domain responses of both Spar and Barge platforms are concentrated in the low-frequency region below 2.00 rad/s. Among the two types of wind farms, the platforms of Spar wind farm have better stability in heave, pitch, roll, yaw four degrees of freedom and nacelle vibration acceleration. The magnitude of platform sway, surge and nacelle vibration acceleration are related to their position in the wind farm.
Key words: offshore wind turbines, wind farm, dynamic response, Spar platform, Barge platform
摘要： 为研究不同海上风力机漂浮式风电场平台风浪流联合作用下动态响应,分别建立基于OC3-Hywind Spar与ITI Energy Barge平台漂浮式风力机的2×2阵列漂浮式风电场,结合辐射/绕射理论与有限元方法,使用海洋工程软件AQWA及风力机仿真软件FAST分别进行水动力学与气动载荷计算,分析2种漂浮式风电场平台时频响应特性。结果表明：Spar与Barge平台频域响应均集中在2.00 rad/s以下低频区域,在2种风电场中,Spar风电场各平台在垂荡、纵摇、横摇、艏摇4自由度及机舱振动加速度上稳定性较好;风电场中平台横荡、纵荡及机舱振动加速度大小与其在风电场中所处位置有关。
关键词: 海上风力机, 风电场, 动态响应, Spar平台, Barge平台
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Author(s):
Liu Xia, Zhang Yi'nan, Wang Guofu, Zhang Mingming, Cao Huijing.
Page No : 128-138
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Protected: STUDY ON AERODYNAMIC NOISE OF WIND AIRFOIL BASED ON CONCAVE-CONVEX LEADING-EDGE METHOD
Abstract
Abstract: In this paper, the methods of experimental measurement and numerical calculation are used to analyze the control of the leading-edge protuberances on reducing the aerodynamic noise for the DU93-W-210 airfoil. The far-field microphone array is used to obtain the aerodynamic noise of the baseline airfoil and airfoil with leading-edge protuberances, and the result of flow field on airfoil surface is obtained through numerical calculation. Through analysis of the experimental and calculation results, it is found that, the method of leading-edge protuberances can effectively suppress the boundary layer separation, thereby controlling the vortex distribution and reducing the pressure fluctuation of the suction surface of the airfoil, disperses the large-scale shedding vortices, and decomposes it into the small-scale periodic shedding vortices with low-strength,which makes the leading-edge protuberances have a significant effect on the reducing of aerodynamic noise. Moreover, the effect of noise reduction is more prominent for wavy airfoil with the amplitude of 0.24c（c: the average chord length） and the wavelength of 0.11c.
Key words: leading-edge protuberance, wind airfoil, aerodynamic noise, numerical simulation, aerodynamic noise testing
摘要： 该文采用实验测量和数值计算相结合的方法,以DU93-W-210翼型为研究对象,研究仿生凹凸前缘结构对其降噪效果的影响。运用远场麦克风阵列获得光滑前缘翼型和凹凸前缘翼型的气动噪声,并通过数值计算得到翼型表面流场结果。通过对实验和数值计算结果的分析发现：凹凸前缘方法能有效抑制边界层分离,控制翼型吸力面涡量的团状分布,减小翼型表面的压力脉动,分解大尺度高强度脱落涡为小尺度低强度周期性脱落涡,使得仿生凹凸前缘翼型有明显的降低气动噪声的作用;具有凹凸前缘的幅值为0.24c（c为平均弦长）、波长为0.11c的仿生翼型降噪效果更为突出。
关键词: 凹凸前缘, 风力机翼型, 气动噪声, 数值模拟, 气动噪声测试
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