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Nigerian wind energy status 尼日利亚风能现状
Q4 ENERGY & FUELS Pub Date : 2023-11-04 DOI: 10.1177/0309524x231206559
Gbubemi Kevin Akporhonor, Smith Orode Otuagoma, Temisan Arnold Akporhonor
This review paper evaluates the current status of the Nigeria wind energy sector to identify the available Wind Energy Potential, Installed Wind Energy Capacity and Renewable Energy Policies in a bid to provide accurate information to aid the exploration and exploitation of wind energy across Nigeria. Consequently, the huge expanse between the wind energy Potential across Cities in Nigeria, the poor numbers of installed wind capacity and Nigeria’s Renewable Energy policies show low interest in Wind Energy in comparison to other RE sources. All this calls for further investment in the Nigerian wind energy sector
本综述评估了尼日利亚风能部门的现状,以确定可用的风能潜力、已安装的风能容量和可再生能源政策,以便为尼日利亚各地的风能勘探和开发提供准确的信息。因此,与其他可再生能源相比,尼日利亚各城市之间风能潜力的巨大差距、风能装机容量的不足以及尼日利亚的可再生能源政策表明,人们对风能的兴趣不高。所有这些都要求对尼日利亚风能部门进行进一步投资
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引用次数: 0
Numerical investigation into performance of Savonius wind turbine equipped with inner blades: Overlap ratio effect 内叶片Savonius风力机性能的数值研究:重叠比效应
Q4 ENERGY & FUELS Pub Date : 2023-11-04 DOI: 10.1177/0309524x231205282
Mohammad Mahdi Hassanshahi, Masoud Kharati-Koopaee
This research focuses on the effect of overlap ratio on the performance of Savonius rotor in the presence of inner blades in such a way that inner blade tip is parallel to the main blade tip and root. Findings reveal that at low overlap ratios, using inner blade that the inner blade tip is parallel to the main blade root leads to a higher power and torque coefficients than the other inner blade configuration and also conventional rotor. This research indicates that for the overlapped rotor and for the two inner blade configurations, the higher power and torque coefficients could be obtained at high and low tip speed ratios, respectively. Results show that for both inner blade configurations, the overlapped rotors overcome the negative torque generated by the non-overlapped one. It is also shown that at high overlap ratio, using inner blade has no advantage over the conventional rotor.
本文主要研究了内叶存在时,当内叶尖端平行于主叶尖端和根部时,重叠比对Savonius转子性能的影响。结果表明,在低重叠比条件下,采用内叶与主叶根平行的内叶结构可以获得比其他内叶结构和常规转子更高的功率和扭矩系数。研究表明,对于重叠转子和双内叶构型,在高、低叶尖速比时可以获得较高的功率系数和转矩系数。结果表明,对于两种内叶构型,重叠转子均能克服非重叠转子产生的负转矩。在高重叠比下,采用内叶并不比常规转子具有优势。
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引用次数: 0
Social welfare maximization in deregulated power market incorporating wind power plants using metaheuristic algorithm 基于元启发式算法的风电市场社会福利最大化研究
Q4 ENERGY & FUELS Pub Date : 2023-11-03 DOI: 10.1177/0309524x231204992
Ajay Swaroop Raturi, Raj Kumar Jarial, Yog Raj Sood, Ankur Maheshwari, Supriya Jaiswal
The increasing integration of renewable energy sources (RESs), particularly wind power plants (WPP), into deregulated power markets introduces complexities in optimizing social welfare (SW). This article proposes a recent metaheuristic algorithm to address this challenge and maximize SW while accounting for the presence of WPP and the inherent uncertainty associated with wind power forecasting. The proposed algorithm optimizes generation scheduling and demand-side bidding strategies in the deregulated power market to maximize SW while ensuring economic efficiency. To validate the effectiveness and robustness of the proposed algorithm, MATLAB simulations are conducted on IEEE 30 and IEEE 118-bus systems. The results demonstrate that the proposed algorithm provides promising solutions for maximizing SW, especially in the context of incorporating WPP. This research contributes to the advancement of power market optimization methods and promotes the seamless integration of RESs, fostering a more sustainable energy future.
可再生能源(RESs),特别是风力发电厂(WPP)日益融入解除管制的电力市场,这给优化社会福利(SW)带来了复杂性。本文提出了一种最近的元启发式算法来解决这一挑战,并在考虑WPP的存在和与风电预测相关的固有不确定性的同时最大化SW。该算法在放松管制的电力市场中优化发电计划和需求侧竞价策略,在保证经济效率的同时最大化发电容量。为了验证该算法的有效性和鲁棒性,在IEEE 30和IEEE 118总线系统上进行了MATLAB仿真。结果表明,本文提出的算法为最大限度地提高SW提供了有希望的解决方案,特别是在结合WPP的情况下。本研究有助于电力市场优化方法的发展,促进RESs的无缝集成,促进更可持续的能源未来。
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引用次数: 0
Modelling and testing of wind energy fed hybrid battery-supercapacitor energy storage operating in pulsed charging mode 脉冲充电模式下风能混合电池-超级电容器储能系统的建模与测试
Q4 ENERGY & FUELS Pub Date : 2023-11-03 DOI: 10.1177/0309524x231203689
Anupam Kumar, Arun Rathore
The use of renewable energy sources such as solar and wind causes fluctuations in power generation. Hence energy storage is necessary in standalone power systems. It is challenging to use batteries as power backups because they cannot handle rapid power fluctuations without compromising battery life. This paper proposes a hybrid energy storage system (HESS) for wind energy-based power systems that includes a battery for long-term energy management with a super capacitor for quick dynamic power regulation. Pulse charging of the proposed HESS is carried out with the help of a dual active bridge (DAB) converter. Pulse charging of the HESS will result into reduced stress on battery and eventually to a longer self-life. The operation of the wind energy fed hybrid battery-supercapacitor energy storage was investigated through simulation using MATLAB-Simulink. For validating the simulation results, an experimental test bench is created using a real DAB prototype and TI Piccolo-F280049 microcontroller.
使用太阳能和风能等可再生能源会引起发电量的波动。因此,在独立的电力系统中,能量存储是必要的。使用电池作为备用电源具有挑战性,因为它们无法在不影响电池寿命的情况下处理快速的电源波动。本文提出了一种用于风能发电系统的混合储能系统(HESS),该系统包括用于长期能量管理的电池和用于快速动态功率调节的超级电容器。在双有源桥(DAB)变换器的帮助下,对所提出的HESS进行脉冲充电。HESS脉冲充电可以减少对电池的压力,从而延长电池的使用寿命。利用MATLAB-Simulink对风电混合电池-超级电容器储能系统的运行进行了仿真研究。为了验证仿真结果,利用真实的DAB样机和TI Piccolo-F280049单片机搭建了实验测试平台。
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引用次数: 0
Wind farm supervisory controller design for power optimization in localized areas using adaptive learning game theory (ALGT) 基于自适应学习博弈论(ALGT)的局部区域功率优化风电场监控控制器设计
Q4 ENERGY & FUELS Pub Date : 2023-11-03 DOI: 10.1177/0309524x231199432
Vahid Fazlollahi, Farzad A Shirazi, Mostafa Taghizadeh
In this paper, a supervisory control concept for wind farms is proposed based on the neighboring wind turbines control functions in localized areas for power optimization considering wake effects. The flow control in wind farms to maximize power production is a challenging problem due to its time-varying nonlinear wake dynamics. Hence, we develop a method that authorizes coordination in a wind farm for a squarely payoff-based scenario where the turbines have access only to measurements from their neighbors via repeated interactions. Therefore, in order to maximize output power in a wind farm, an Adaptive Learning Game Theory (ALGT) method is introduced. This control scheme provides an interaction framework that constructs a series of common control functions. Here, in every iteration, each turbine chooses an independent decision according to a localized control law. The control objective of wind turbine [Formula: see text] determines how each turbine adjusts a decision at each iteration by processing available information.
本文提出了一种基于局部区域邻近风力机控制函数的风电场监督控制概念,以考虑尾流效应进行功率优化。由于风电场具有时变的非线性尾流动力学特性,为实现风力发电的最大化而控制风电场的流动是一个具有挑战性的问题。因此,我们开发了一种方法,授权风电场在完全基于收益的情况下进行协调,在这种情况下,涡轮机只能通过反复的相互作用获得相邻涡轮机的测量结果。因此,为了使风电场的输出功率最大化,引入了自适应学习博弈论(ALGT)方法。该控制方案提供了一个交互框架,该框架构建了一系列通用控制功能。这里,在每次迭代中,每个涡轮机根据一个局部控制律选择一个独立的决策。风力机的控制目标[公式:见文]决定了每个风力机如何通过处理可用信息来调整每次迭代的决策。
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引用次数: 0
Dynamic performance improvement of an isolated wind-diesel system with intelligently controlled supercapacitor energy storage system 智能控制超级电容储能系统对隔离型风电-柴油系统动态性能的改善
Q4 ENERGY & FUELS Pub Date : 2023-11-03 DOI: 10.1177/0309524x231203952
Gazala Rashid, Shameem Ahmad Lone, Mairaj Ud din Mufti
This paper aims to develop a supervisory control scheme to enhance the effectiveness and profitability of a small-rating super capacitor energy storage system (SCESS) used in load-frequency-control applications. The proposed approach, which uses one-step-ahead adaptive predictive control (APC), adeptly handles the operational limitations of the SCESS. For the purpose of online estimation of system parameters, the recursive least square (RLS) algorithm has been employed. The system can be characterized as a two input two output system, wherein the real and reactive powers required by the SCESS serve as control signals issued by the controller. The SCESS voltage is subject to constraints to limit energy trade within specific bounds. The proposed control scheme successfully maintains the voltage constraints of the SCESS while significantly reducing frequency and voltage deviations in the presence of two disturbances, viz; load disturbance and wind disturbance. The effectiveness of the proposed scheme is demonstrated through simulation experiments on an isolated hybrid wind diesel power system, which addresses several modeling and design aspects.
本文旨在开发一种监控方案,以提高用于负载频率控制应用的小额定值超级电容器储能系统(SCESS)的有效性和盈利能力。所提出的方法采用一步前向自适应预测控制(APC),熟练地处理了SCESS的操作限制。为了在线估计系统参数,采用递推最小二乘(RLS)算法。该系统可以表征为双输入双输出系统,其中SCESS所需的实功率和无功功率作为控制器发出的控制信号。SCESS电压受到限制,将能源交易限制在特定范围内。所提出的控制方案成功地保持了SCESS的电压约束,同时显著降低了存在两个干扰时的频率和电压偏差,即;负载扰动和风扰动。通过对一个孤立的混合动力风力发电系统的仿真实验,验证了该方案的有效性,解决了建模和设计方面的问题。
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引用次数: 0
Flexible load control of new energy based on improved genetic algorithm 基于改进遗传算法的新能源柔性负荷控制
Q4 ENERGY & FUELS Pub Date : 2023-10-31 DOI: 10.1177/0309524x231203685
Jiyan Liu, Dong Li, Zhelong Wang, Weishuai Wang, Meng Li
In the medium and low voltage distribution network, the load form of users is complex and changeable. There are a large number of single-phase and two-phase loads connected to the distribution network, resulting in a three-phase unbalanced operation of the distribution network. With the development of the new energy, the high proportion of distributed new energy will further aggravate the three-phase imbalance of the distribution network. Therefore, this paper proposes a coordinated optimization framework of droop parameters based on the multi-converter droop control, which takes the minimum loss of the distribution network as the optimization objective, and optimizes the reference point and the slope of the VSC droop hierarchically. A small-signal stability optimization dispatching method for the VSC droop slope in the DC distribution network is proposed. By adding small-signal stability constraints to the slope optimization model, the optimal slope command and slope stability region which can ensure the small-signal stable operation of the system are obtained. Experiments show that the optimization model of the VSC small-signal stability slope can make the droop control instruction significantly improve the small-signal stability of the system to adapt to the intra-day source load power fluctuations with a small economic cost. The slope stability region pre-optimization model can provide a reliable stability slope upper limit for the slope optimization problem based on ensuring the system operation economy. The research in this paper can make full use of the flexible control ability of power electronic equipment, and then suppress the three-phase imbalance, which is of great significance to improve the security and economy of the distribution system operation.
在中低压配电网中,用户负荷形式复杂多变。配电网中有大量的单相和两相负荷接入,导致配电网三相不平衡运行。随着新能源的发展,分布式新能源的高比例将进一步加剧配电网的三相不平衡。为此,本文提出了一种基于多变流器下垂控制的下垂参数协调优化框架,以配电网损耗最小为优化目标,对VSC下垂的参考点和斜率进行分层优化。提出了一种针对直流配电网VSC下垂斜率的小信号稳定性优化调度方法。通过在边坡优化模型中加入小信号稳定性约束,得到了保证系统小信号稳定运行的最优边坡指令和边坡稳定区域。实验表明,VSC小信号稳定斜率优化模型可以使下垂控制指令显著提高系统的小信号稳定性,以较小的经济成本适应日内源负荷功率波动。边坡稳定区预优化模型可以在保证系统运行经济性的前提下,为边坡优化问题提供可靠的稳定边坡上限。本文的研究可以充分利用电力电子设备的柔性控制能力,进而抑制三相不平衡,对提高配电系统运行的安全性和经济性具有重要意义。
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引用次数: 0
Optimal control of the electro-hydraulic actuator for variable pitch variable speed wind turbine: Performance enrichment 变螺距变速风力机电液执行器的最优控制:性能充实
Q4 ENERGY & FUELS Pub Date : 2023-10-31 DOI: 10.1177/0309524x231202765
Mahideremariam Alemu, Endalew Ayenew
The wind energy generation system is complex because of varying wind speeds and its control systems to improve its ability of energy harvesting. This paper considers a hydraulic actuator-based variable-pitch angle control of a 1.5 MW wind turbine. The existing control systems of the pitch mechanism of the wind turbines are complex and bulky size. This study applied Genetic Algorithm based Proportional Integral Derivative Controller (GA-PID), Fractional Order Proportional Integral Derivative (FOPID), and Genetic Algorithm based Fractional Order Proportional Integral Derivative (GA-FOPID) controllers to adjust the pitch angle of the wind turbine blade. The performance of GA-FOPID, FOPID, and GA-PID controlled pitch angle is compared by considering different wind speeds. The GA-FOPID controller reduced the variation in mechanical power to 0.08% concerning the rated value and the variation in mechanical torque to 1.51% in comparison to the rated value. Therefore, the GA-FOPID controller shows better performance than the conventional PID.
风力发电系统是复杂的,因为风速变化和控制系统,以提高其能量收集能力。研究了一种基于液压作动器的1.5 MW风力发电机组变俯仰角控制方法。现有的风力发电机纵摇机构控制系统结构复杂,体积庞大。本研究采用基于遗传算法的比例积分导数控制器(GA-PID)、分数阶比例积分导数控制器(FOPID)和基于遗传算法的分数阶比例积分导数控制器(GA-FOPID)来调节风力机叶片的俯仰角。在考虑不同风速的情况下,比较了GA-FOPID、FOPID和GA-PID控制俯仰角的性能。GA-FOPID控制器将机械功率相对额定值的变化减小到0.08%,机械扭矩相对额定值的变化减小到1.51%。因此,GA-FOPID控制器表现出比传统PID更好的性能。
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引用次数: 0
Analysis of the effect of parametric uncertainty on dynamic performances of doubly fed induction generator-based wind energy conversion system 参数不确定性对双馈感应发电机风能转换系统动态性能的影响分析
Q4 ENERGY & FUELS Pub Date : 2023-10-31 DOI: 10.1177/0309524x231201526
Endalew Ayenew Haile, Milkias Berhanu Tuka
The wind, stochastic in nature, is one of the fastest-growing and most promising renewable energy resources in the entire world. Thus, this paper investigates the influence of parameter uncertainties upon a dynamic performance of a grid-tied Doubly-Fed Induction Generator (DFIG)-based Wind Energy Conversion System (WECS). The main uncertain parameters found in the study are mutual and rotor winding reactances which occurred due to the variation of the angular positions of the rotor caused by varying wind speeds. The variation in the wind speed caused the generator rotor speed to deviate between 25% and 150%. Consequently, the rotor winding reactance of DFIG changes from its nominal value of 1.31 mΩ to between 0.983 and −0.655 mΩ; and the mutual reactance from its nominal value of 0.941 Ω to between 0.758 and −0.4708 Ω. As a result, the stator and rotor winding voltages and currents of the DFIG are uncertain.
风能具有随机性,是世界上发展最快、最有前途的可再生能源之一。因此,本文研究了参数不确定性对并网双馈感应发电机(DFIG)风能转换系统(WECS)动态性能的影响。研究中发现的主要不确定参数是互绕组和转子绕组的电抗,这是由于不同风速引起转子角位置的变化而产生的。风速的变化导致发电机转子转速偏差在25% ~ 150%之间。因此,DFIG的转子绕组电抗从其标称值1.31 mΩ变化到0.983 ~ - 0.655 mΩ之间;并且互抗从其标称值0.941 Ω到0.758 ~ - 0.4708 Ω之间。因此,DFIG的定子和转子绕组的电压和电流是不确定的。
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引用次数: 0
Energy management strategies of hybrid renewable energy systems: A review 混合可再生能源系统的能源管理策略综述
Q4 ENERGY & FUELS Pub Date : 2023-10-30 DOI: 10.1177/0309524x231200010
Marwa M. Ibrahim
Burning fossil fuels results in more emissions than generating electricity from renewable sources. The transition to renewable energy from fossil fuels, which currently produce the majority of emissions, is essential to preventing the climatic disaster. Hybrid energy generation systems are still in their infancy. It is envisaged that future technology developments would lead to greater application and more economical goods. There will be more standardised designs, which will make it easier to select a system that is suitable for a certain application. The components will communicate more with one another. As a result, control, monitoring, and diagnosis will be made simpler. The hybrid energy system (HES), also known as hybrid power, is expected to be the long-term power solution for microgrid (MG) systems. This study compares and contrasts several theories and conventional approaches to controlling HRES’s control and energy consumption. A successful energy management strategy has been created using a variety of methods and procedures. The effectiveness of an EMS is determined by its control architecture and the solution approach used; common topologies include hierarchical, decentralised and centralised EMS. Supply side management and demand side management, two EMS components, will be discussed later. The three EMS control architectures are examined in this section. In order to determine the most practical and dependable solution with the lowest Net present cost (NPC), COE and realistic environmental consequences, various hybridisation cases of a PV panel, wind turbine, battery storage and diesel generator are designed, analysed and compared using DSM. The results of taking into account DSM indicated a reduction in CO 2 emissions of 25%, NPC emissions of 14.8%, COE emissions of 14% and an increase in RF emissions of 8.5%. Two fundamental metrics – the DSM Quality Index for technical benefits and the DSM Appreciation Index for economic advantages – are used to assess the technical and economic benefits of DSM.
燃烧化石燃料比利用可再生能源发电产生更多的排放。从目前产生大部分排放的化石燃料向可再生能源过渡,对于防止气候灾难至关重要。混合能源发电系统仍处于起步阶段。预计未来的技术发展将导致更广泛的应用和更经济的产品。将会有更多的标准化设计,这将使选择适合特定应用的系统变得更加容易。组件之间将进行更多的通信。因此,控制、监测和诊断将变得更加简单。混合能源系统(HES),也被称为混合电力,有望成为微电网(MG)系统的长期电力解决方案。本研究比较和对比了几种控制HRES控制和能源消耗的理论和传统方法。一个成功的能源管理策略已经创建使用各种方法和程序。环境管理体系的有效性取决于其控制体系结构和所采用的解决方案;常见的拓扑包括分层的、分散的和集中的EMS。供应侧管理和需求侧管理是EMS的两个组成部分,将在后面讨论。本节将介绍三种EMS控制体系结构。为了确定具有最低净当前成本(NPC), COE和现实环境后果的最实用和可靠的解决方案,使用DSM设计,分析和比较了光伏电池板,风力涡轮机,电池存储和柴油发电机的各种混合情况。考虑到DSM的结果表明,二氧化碳排放量减少了25%,NPC排放量减少了14.8%,COE排放量减少了14%,射频排放量增加了8.5%。两个基本指标——技术效益的DSM质量指数和经济效益的DSM增值指数——被用来评估DSM的技术和经济效益。
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引用次数: 0
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Wind Engineering
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