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2019 IEEE PES/IAS PowerAfrica最新文献

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A Multi-Agent System Architecture for Deregulated Electricity Market Communications in Nigeria 尼日利亚解除管制电力市场通信的多代理系统架构
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928636
Joseph Olufemi Dadam
The deregulation of electricity market in Nigeria has opened up the requirement for information exchange among the market players in order to guarantee the reliability and security of the interconnected power system. Information and data exchange in heterogeneous data environment of the diverse market players are difficult due different data model and organization. This paper presents a bottom-up modeling approach of information exchange system for Nigerian deregulated electric power market using Multi-Agents System (MAS). To construct the MAS system, the functionalities of the agents, the interactions among the agents, and agent architecture are designed. A MAS for data communication based on the proposed architecture is an effective way of integrating heterogeneous data sources from the diverse players in the electricity market in Nigeria. MAS is well suitable for considering different scenarios of information exchange among market players as well as testing different requirements of information exchange in the electricity market.
尼日利亚电力市场的放松管制,为保证互联电力系统的可靠性和安全性,对市场参与者之间的信息交换提出了要求。由于数据模型和组织方式的不同,在不同市场主体的异构数据环境中,信息和数据的交换变得困难。本文提出了一种基于多智能体系统(MAS)的尼日利亚解除管制电力市场信息交换系统的自下而上建模方法。为了构建MAS系统,设计了agent的功能、agent之间的交互以及agent的体系结构。基于所提出的体系结构的数据通信MAS是整合尼日利亚电力市场中不同参与者的异构数据源的有效方法。MAS非常适合考虑市场主体之间信息交换的不同场景,也适合测试电力市场中信息交换的不同需求。
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引用次数: 0
Energy Efficiency in Unmanned Aircraft Systems: A Review 无人机系统的能源效率:综述
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928766
O. Babayomi, Abubakar U. Makarfi
This paper presents a review of the state of the art of energy efficiency in unmanned aircraft systems. Key characteristics include the dominance of battery-powered small and micro-unmanned aircraft, micro-turbine powered micro unmanned aircraft and gas turbine-powered large unmanned aircraft. Key development trends include the improvement of fuel cell technologies for usability in unmanned aircraft systems and improved composite structures for lighter weight unmanned aircraft. Key current issues such as the specific energy density and power of all the available propulsion types are highlighted. The paper concludes with a discussion of expected future trends in the efficiency of unmanned aircraft propulsion during coming years.
本文综述了无人机系统能源效率的研究现状。主要特征包括电池驱动的小型和微型无人机、微涡轮驱动的微型无人机和燃气涡轮驱动的大型无人机的主导地位。关键的发展趋势包括改进燃料电池技术以用于无人机系统,改进复合材料结构以用于更轻重量的无人机。当前的关键问题,如比能量密度和功率的所有可用的推进类型被强调。最后,对未来几年无人机推进效率的发展趋势进行了展望。
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引用次数: 2
On the Enhancement of Power System Operational Performance Through UPFC: A Topological-Based Approach 通过UPFC提高电力系统运行性能:一种基于拓扑的方法
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928751
Akintunde Samson Alayande, Osita U. Omeje, C. Awosope, T. Akinbulire, F. Okafor
This paper focusses on how the operational performance of power system networks can be significantly enhanced based on the topology of the network. This enhancement in the operational performance of the network is achieved through the reactive power injection using the Unified Power Flow Controller (UPFC). The mathematical formulations based on circuit theory are presented. The location for the placement of UPFC is determined using an index termed Network Branch Index (NBI). Based on the suitable locations identified using NBI, the influence of UPFC on the operational performance, such as voltage magnitude at every bus of the network and network transmission loss is investigated. A 6-bus system is used to demonstrate the effectiveness of the approach. The simulations are carried out using Power System Analysis Toolbox (PSAT) in the MATLAB environment. The dynamic behavior of the network is investigated when the identified critical line is subjected to contingency analysis. The results obtained show the capability of the NBI technique and also show that there is a significant enhancement in the voltage profile of the network as well as a significant reduction in the transmission line loss when UPFC is placed based on the location identified by the NBI. The results obtained from this study show the role of the network topology in identifying a suitable location for reactive power injections, through FACTS devices, within power systems.
本文主要研究如何基于网络拓扑结构显著提高电力系统网络的运行性能。这种网络运行性能的增强是通过使用统一潮流控制器(UPFC)的无功功率注入来实现的。给出了基于电路理论的数学表达式。UPFC的放置位置是通过网络分支索引(NBI)来确定的。基于NBI确定的合适位置,研究了UPFC对网络各母线电压幅值和网络传输损耗等运行性能的影响。以一个6总线系统为例,验证了该方法的有效性。在MATLAB环境下,利用电力系统分析工具箱(PSAT)进行仿真。对确定的临界线路进行权变分析时,研究了电网的动态行为。所获得的结果显示了NBI技术的能力,也表明当UPFC基于NBI识别的位置放置时,网络电压分布有显着增强,传输线损耗显着降低。从本研究中获得的结果显示了网络拓扑在确定电力系统内通过FACTS设备进行无功功率注入的合适位置方面的作用。
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引用次数: 1
Smart Grid and Distributed Generation: A Panacea for Nigeria’s Power Problems 智能电网和分布式发电:解决尼日利亚电力问题的灵丹妙药
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica46609.2019.9078672
Obianuju V. Chukwuorji, B. Saka, I. D. Inuwa, S. Hussein, Sadiq Thomas, Steve A. Adeshina
The inadequacy of the power supply in Nigeria seems to have defied all solutions proffered over the years by experts. The involvement of the private sector which became necessary by the unbundling of the singular public utility company Power Holding Company of Nigeria (PHCN) has done little to improve the situation. This paper proposes the use of smart grid and distributed generation to improve the generation, transmission and distribution of electric power in the country. Smart Grid technologies which incorporates communication technologies into the conventional grid as we know, brings about adequacy in generation, transmission and distribution of power, which has so far been lacking in the contemporary Nigerian society. The communication systems incorporated in the smart grid allows a two-way communication between the utility company and consumers. This is needed in a situation such as ours as it gives consumers the power to regulate their consumption while giving the utility companies real time online information from the consumer end. Distributed generation on the other hand makes it possible to incorporate renewable energy sources which the country has in abundance into the power supply mix. This paper discusses the various benefits derivable from the use of these technologies as a solution to the epileptic and inadequate supply presently experienced in the country.
尼日利亚的电力供应不足似乎使多年来专家们提出的所有解决办法都无法奏效。私营部门的参与在单一的公用事业公司尼日利亚电力控股公司(PHCN)分拆后变得必要,但对改善这种情况几乎没有任何作用。本文提出利用智能电网和分布式发电来改善我国电力的发电、输配电。智能电网技术将通信技术整合到我们所知的传统电网中,带来了当代尼日利亚社会迄今所缺乏的发电、输电和配电的充足性。智能电网中的通信系统允许公用事业公司和消费者之间的双向通信。在我们这样的情况下,这是需要的,因为它赋予消费者调节消费的权力,同时为公用事业公司提供来自消费者端的实时在线信息。另一方面,分布式发电使得将该国丰富的可再生能源纳入电力供应结构成为可能。本文讨论了使用这些技术作为解决该国目前所经历的癫痫和供应不足问题的各种好处。
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引用次数: 2
The Smart Way 聪明的方式
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928642
Chukwuemeka Chiatula, B. Saka, Thomas Sadiq, Steve A. Adeshina, J. Tsado
The growing awareness of carbon emissions in power generation, increased electricity demand and difficulties in the integration of renewable energy into the grid cannot be overlooked. This calls for the development of a more flexible and controllable grid called the Smart Grid. This paper gives an overview of the different Smart Grid agents such as Advanced Metering Infrastructure (AMI), Renewable Energy, Improved Transmission Applications, Plug-in Hybrid Electric Vehicle (PHEV) and Grid Management Systems. These agents were placed in phases to show the different progressive stages of the Smart Grid integration into the existing power system. The impact of the transformation of the existing power grid to the future grid was broken down into three stages: The end-user experience sphere, smart grid sphere and systems sphere. Defining these stages in smart grid maturity will give us a concept of a pathway towards achieving the solution goals of an intelligent grid.
人们对发电碳排放、电力需求增加以及可再生能源并网困难的认识日益增强,这些都不容忽视。这就要求开发一种更灵活、更可控的电网,即智能电网。本文概述了不同的智能电网代理,如先进计量基础设施(AMI)、可再生能源、改进传输应用、插电式混合动力汽车(PHEV)和电网管理系统。这些代理被分阶段放置,以显示智能电网与现有电力系统集成的不同渐进阶段。将现有电网向未来电网转型的影响分为三个阶段:终端用户体验领域、智能电网领域和系统领域。定义智能电网成熟的这些阶段将为我们提供实现智能电网解决方案目标的途径概念。
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引用次数: 3
Solar Radiation Estimations Using the Territorial Climatological Measurements in Vhembe District, Limpopo Province for Solar Energy Potential Estimation and Use 利用林波波省Vhembe地区陆地气候测量估算太阳辐射对太阳能潜力的估算和利用
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928806
C. Matasane, M. Kahn
Determining the solar radiation for the use of energy generation involves a number of procedures, estimations and calculations using the climatological weather data measurements. The case study was conducted in the Vhembe District area through the nine installed Weather Stations (WS). The analysis determines the minimum and maximum solar radiation equations associated with the local climate patterns in accommodating the theoretical bases and its time period changes. The paper contributes to the main project objectives on renewable (i.e. solar, wind, biomass/biogas and hydro) energy assessment for their potentials and generating at small/ micro scale in the district. These parameters are very important in estimating the solar energy radiation to the area using its extraterrestrial solar radiation per day/ weekly/ monthly and annual periods. The metrology estimations through graphical representations were performed. These provided calculations in which territorial solar energy was determined through climatic conditions and analysis found to be usable.
确定用于发电的太阳辐射涉及使用气候天气数据测量的一系列程序、估计和计算。案例研究是通过在Vhembe地区安装的9个气象站(WS)进行的。分析确定了与局地气候型相关的最小和最大太阳辐射方程,适应了理论基础及其周期变化。该文件有助于可再生能源(即太阳能、风能、生物质能/沼气和水力)的主要项目目标,评估其潜力并在该地区进行小型/微型发电。这些参数在利用地外太阳辐射日/周/月和年周期估算该地区的太阳辐射时非常重要。通过图形表示进行了计量估计。这些计算提供了通过气候条件和发现可用的分析来确定领土太阳能的方法。
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引用次数: 1
Power distribution fault diagnostic method based on machine learning technique 基于机器学习技术的配电故障诊断方法
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928633
K. Moloi, A. Akumu
Fault detection, classification and estimation in power systems is one of the most critical aspects of the engineering society. This goes beyond engineering factors to economic implications. Thus, proper applications of protection schemes are required to minimize the equipment damage resulting from a fault. This paper presents a method which tries to proactively detect, classify and estimate the position of the fault. A simplified two bus 132 kV system is modelled to study the effect of the proposed fault diagnostic method. The proposed method has a fault feature extraction technique done by stationary wavelet transform (SWT) on the fault signal. Relevance Vector Machine (RVM) and Support vector machine (SVM) schemes are applied for fault classification and detection. Fault location along the distribution line is achieved by using Support Vector Regression (SVR). The proposed method comprises of SWT-RVM and SVR schemes and tested using MATLAB.
电力系统的故障检测、分类和估计是工程社会中最重要的方面之一。这不仅涉及工程因素,还涉及经济影响。因此,需要适当的保护方案,以尽量减少故障对设备的损害。本文提出了一种主动检测、主动分类和主动估计故障位置的方法。以一个简化的双母线132 kV系统为例,研究了所提出的故障诊断方法的效果。该方法采用平稳小波变换(SWT)对故障信号进行特征提取。采用相关向量机(RVM)和支持向量机(SVM)方案进行故障分类和检测。利用支持向量回归(SVR)实现配电线路沿线故障定位。该方法包括SWT-RVM和SVR两种方案,并在MATLAB中进行了测试。
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引用次数: 9
State estimation of energy measurements for enhanced trust in distributed ledger applications on rural microgrids 农村微电网分布式账本应用中增强信任的能源测量状态估计
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928715
C. Mullen, N. Wade
Distributed ledger technology has the potential to revolutionize the exchange of value in energy supply systems. Trust is central to the records in a ledger and the measurement of energy production or consumption must be dependable for confidence in an energy transaction. The case of measurement accuracy and error detection in a rural micro-grid is investigated for methods to enhance trust in energy exchanges. The suitability of state estimation as a technique is evaluated for mitigating inaccuracies in meter accuracy and therefore increasing trust. Application of the same principle for error detection, either from intentional meter tampering or faulty equipment is outlined. State estimation is found to provide a small improvement to the measurement of energy in a simple radial micro-grid, suggesting that with further work this method could benefit micro-grid operators and users seeking improvements to the accuracy and error detection.
分布式账本技术有可能彻底改变能源供应系统的价值交换。信任是分类帐记录的核心,能源生产或消耗的测量必须是可靠的,才能对能源交易产生信心。以农村微电网测量精度和误差检测为例,探讨增强能源交换信任的方法。评估了状态估计作为一种技术的适用性,以减轻仪表精度的不准确性,从而增加信任。应用相同的原理进行错误检测,无论是从故意篡改仪表或故障设备概述。发现状态估计对简单径向微电网的能量测量提供了一个小的改进,表明通过进一步的工作,该方法可以使微电网运营商和用户寻求提高精度和误差检测。
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引用次数: 2
Data-based Analysis of Power Generation and Transmission Losses in Nigeria 基于数据的尼日利亚发电和输电损失分析
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica46609.2019.9078668
Adekitan A.I, Olajube A.A, Samuel I.A
The availability and reliability of power supply are vital to socioeconomic development. Nigeria is the most populous country in Africa with electrical power generation that is just a fragment of the energy demands of the populace. In this study, we analyzed the trend of power generation and losses in the Nigerian power system. The average peak power generated over the study period is just 4229.39MW which is approximately 23.5MW per million people. This is meagre when compared with about 500MW per million people in South Africa. Therefore, adequate and sustainable effort are required in terms of investment and management at the generation, transmission and distribution levels toward ensuring improved power supply in Nigeria. There is a need to introduce renewable energy sources into the energy mix at the national level in order to reduce environmental pollution, and also to promote the use of sustainable alternative energy sources at the household and industrial level which will stimulate private sector participation through the establishment of commercial energy farms.
电力供应的可用性和可靠性对社会经济发展至关重要。尼日利亚是非洲人口最多的国家,其发电量只是民众能源需求的一小部分。在本研究中,我们分析了尼日利亚电力系统的发电和损耗趋势。研究期间的平均峰值发电量仅为4229.39兆瓦,约为每百万人23.5兆瓦。与南非每百万人约500兆瓦的电量相比,这是微不足道的。因此,需要在发电、输电和配电层面的投资和管理方面做出充分和可持续的努力,以确保改善尼日利亚的电力供应。有必要在国家一级将可再生能源纳入能源组合,以减少环境污染,并促进在家庭和工业一级使用可持续的替代能源,这将通过建立商业能源农场刺激私营部门的参与。
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引用次数: 2
Enhancement of Power System Transmission Using Static Synchronous Compensator (STATCOM) 静态同步补偿器(STATCOM)增强电力系统传输
Pub Date : 2019-08-01 DOI: 10.1109/PowerAfrica.2019.8928629
I. O. Ozioko, Chinweike Okoli, N. G. Ajah, N. S. Ugwuanyi
Flexible Alternating Current Transmission System (FACTS) recently has proved to be economical with high efficiency in stabilizing electrical power and voltage of power systems without investing on establishing new network. However FACTS performance depends largely on it’s optimal location in the network. This work has investigated the contribution of STATCOM to the performance of 28-bus, 330kV Nigeria power system. The results were presented for both base case and after the compensation using PSSE software. Base case and after the application of 3 X 100MVA STATCOM recorded a respective power loss of 91.28MW and 71.07MW which shows 20.21% reduction in power loss. Five buses (New Haven, Onitsha, Gombe, Jos and Kano) recorded (0.8580, 0.8833, 0.7376, 0.8875, and 0.8847) p.u respectively which fell outside the voltage limit of ±5% used.The buses were respectively improved to 1.0 p.u after compensation. Our results show better improvement compared to previous work on the same network.
近年来,柔性交流输电系统(FACTS)已被证明是一种经济高效的稳定电力和电压的输电系统,而无需投资新建电网。然而,FACTS性能在很大程度上取决于它在网络中的最佳位置。本文研究了STATCOM对尼日利亚28总线330kV电力系统性能的贡献。本文给出了用PSSE软件补偿基本情况和补偿后的结果。基准情况和应用3 × 100MVA后,STATCOM分别记录了91.28MW和71.07MW的功率损耗,功率损耗减少了20.21%。5个母线(纽黑文、奥尼沙、贡贝、乔斯和卡诺)分别记录了(0.8580、0.8833、0.7376、0.8875和0.8847)p.u,超出了使用的±5%的电压限制。补偿后的母线分别提高到1.0 p.u。我们的结果与之前在相同网络上的工作相比有了更好的改进。
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引用次数: 0
期刊
2019 IEEE PES/IAS PowerAfrica
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