2020 International SAUPEC/RobMech/PRASA Conference最新文献_第10页

Comparison of grounding methods for utility scale PV plants 公用事业规模光伏电站接地方法比较

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9040957

Hermen Smit, A. Rix

引用次数: 0

[Copyright notice] (版权)

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/saupec/robmech/prasa48453.2020.9041111

引用次数: 0

Impedance Matching of Direct Grid-Connected Renewable Energy Synchronous Generators 直接并网可再生能源同步发电机阻抗匹配

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041142

D. Ockhuis, M. Kamper, Andrew T. Loubser

引用次数: 2

Preliminary analysis of the impact of design-stage uncertainties on the performance of microgrids 设计阶段不确定性对微电网性能影响的初步分析

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041067

D. Mouton, B. Bekker

{"title":"Preliminary analysis of the impact of design-stage uncertainties on the performance of microgrids","authors":"D. Mouton, B. Bekker","doi":"10.1109/SAUPEC/RobMech/PRASA48453.2020.9041067","DOIUrl":"https://doi.org/10.1109/SAUPEC/RobMech/PRASA48453.2020.9041067","url":null,"abstract":"This paper presents an analysis of how design-stage uncertainties affect the operational performance of a microgrid, measured through metrics like fuel consumption, excess renewable energy, hardware utilisation and economic feasibility. The results show that as uncertainties in the load and weather data used to size the microgrid increase, so do the performance risks. The weather resource results show that a significant economic and technical performance change can occur between different years. The research also considered the impact of utilising three dispatch strategies during microgrid sizing and later operations. The results display the importance of taking the dispatch strategy into consideration during the sizing process, as it ultimately influences and amplifies operational performance impacts. The Predictive Dispatch strategy system shows the best performance initially due to the smaller component sizes realised but performs noticeably worse compared to other strategies when uncertainties occur. This study also highlights the risk of using a deterministic program where only one specific solution is given, compared to following a probabilistic approach to microgrid sizing.","PeriodicalId":215514,"journal":{"name":"2020 International SAUPEC/RobMech/PRASA Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128588644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Review on the Use of Recommendation and Value Estimation Systems to Determine Protection Based Distributed Generation Penetration Limits 基于保护的分布式发电渗透限值的推荐和价值评估系统的应用综述

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041048

E. Nxumalo, K. Awodele

{"title":"A Review on the Use of Recommendation and Value Estimation Systems to Determine Protection Based Distributed Generation Penetration Limits","authors":"E. Nxumalo, K. Awodele","doi":"10.1109/SAUPEC/RobMech/PRASA48453.2020.9041048","DOIUrl":"https://doi.org/10.1109/SAUPEC/RobMech/PRASA48453.2020.9041048","url":null,"abstract":"The rise of disruptive technologies and the rapid growth of innovative initiatives has led to a trend of decentralization, deregulation, and distribution of regulated/centralized services. As a result, there is an increasing number of distributed generator connection requests in the distribution networks and the need for Power utilities to quickly assess the impact of distributed generators (DGs) to keep up with these requests. Grid integration of DGs brings about protection issues: current protection systems were not designed for bidirectional power flow, thus the protective devices in the network lose their ability to perform their main functions. To mitigate the impact of Distributed Generation (DG), there are standards and policies that constrain the number of DGs that can be connected to the distribution network. The problem with these limits is that they are based only on overload and overvoltage, and do not adequately define the DG size/threshold before the occurrence of a protection issue. In addition, a load study for the area of connection still needs to be conducted and depending on the location, it takes time. In this paper, a study of the use of recommendation & value estimation systems to determine Protection based penetration limits and an opportunity network will be reviewed. These investigations are performed on Jupyter notebook (anaconda3).","PeriodicalId":215514,"journal":{"name":"2020 International SAUPEC/RobMech/PRASA Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117025942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Sunrise, Sunset and Temperature Now-cast model comparisons for local Safe Drone Flights Predictions: Case study of Durban, South Africa 当地安全无人机飞行预测的日出、日落和温度模型比较:以南非德班为例

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041143

R. Stopforth, S. Davrajh

引用次数: 1

Characterisation of the primary heat replacement element event for a horizontal electric water heater 卧式电热水器一次热替换元件事件的特性分析

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041057

T. Reddy, Yasteer Sewpersad, Yu-Chieh J. Yen

{"title":"Characterisation of the primary heat replacement element event for a horizontal electric water heater","authors":"T. Reddy, Yasteer Sewpersad, Yu-Chieh J. Yen","doi":"10.1109/SAUPEC/RobMech/PRASA48453.2020.9041057","DOIUrl":"https://doi.org/10.1109/SAUPEC/RobMech/PRASA48453.2020.9041057","url":null,"abstract":"A statistical model is developed to understand the volume of water drawn from a horizontal water heater in relation to its primary heat replacement. An experiment is designed to obtain unbiased data that can be used to build a model. The model is a combination of linear and multivariate regression-based methods that uses the primary heating duration observed on the water heater's element heating pattern. It is determined that the relation between the primary heating event and the draw volume is linear. Testing showed that ambient temperature differences can increase the precision interval to 16% if not accounted for. Points of test data are used to expand the model and reduce the error to 6%. This method can reduce the complexity of physical models by eliminating the need to consider the complex thermodynamics within the electric water heater (EWH) caused by stratification for this early iteration of the model. Through the use of a simple linear regression model, it is found that a high volume draw at a high flow rate reduces the energy required by the heating element by distributing the concentrated energy at the top of the EWH better. This temperature profile is assumed to be a result of the positioning of the thermostat in the EWH. The ambient temperature is also found to have a significant impact on energy input of the heating element for a draw event.","PeriodicalId":215514,"journal":{"name":"2020 International SAUPEC/RobMech/PRASA Conference","volume":"355 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123092036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary Study of Fault Detection on an Islanded Microgrid Using Artificial Neural Networks 基于人工神经网络的孤岛微电网故障检测初步研究

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041063

Itani Phafula, Ellen De Mello Koch, K. Nixon

引用次数: 4

A Software Defined Approach for Improving Resilience in Smart Distribution Grids 一种提高智能配电网弹性的软件定义方法

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041133

G. Brown, N. Ventura, Joyce B. Mwangama

{"title":"A Software Defined Approach for Improving Resilience in Smart Distribution Grids","authors":"G. Brown, N. Ventura, Joyce B. Mwangama","doi":"10.1109/SAUPEC/RobMech/PRASA48453.2020.9041133","DOIUrl":"https://doi.org/10.1109/SAUPEC/RobMech/PRASA48453.2020.9041133","url":null,"abstract":"Smart grid is an essential part of the world's changing energy landscape. The uptake of smart grid by utilities is however hampered by the perceived complexity and large capital investment required to implement resilient Information Communication Technology (ICT) and networks that can support self-healing smart grids. Furthermore, failure to meet stringent smart grid communication reliability requirements can have disastrous consequences for grid owners and users. Many of the challenges utilities face with their smart grid ICT network development plans can be attributed to a reliance on conventional designs centred on expanding network hardware infrastructure in vast grid networks. What is needed to overcome these challenges is alternative ways of designing smart grid communication networks, using software defined approaches. This paper proposes a framework that supports software defined designs by combining the principles of the Internet of Things (IoT) paradigm and Machine-to-Machine (M2M) communication. Using the frameworks of software defined systems and virtualisation, our proposed architecture aims to provide a more flexible and affordable approach to developing and maintaining grid communication networks while offering a high level of network reliability, required for various smart grid applications. An evaluation of the implementation of this architecture in a design, based on a real city distribution grid, shows that a software defined communication network is easy to implement when using virtual machines running on existing computer infrastructure and that it is capable of supporting the network functions required for improving communication reliability. We conclude that this approach can potentially promote the adoption of smart grid by utilities while offering new innovative ways for smart grid developers to improve their grid designs.","PeriodicalId":215514,"journal":{"name":"2020 International SAUPEC/RobMech/PRASA Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114525445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Development of a low cost rotor position sensor 低成本转子位置传感器的研制

2020 International SAUPEC/RobMech/PRASA Conference Pub Date : 2020-01-01 DOI: 10.1109/SAUPEC/RobMech/PRASA48453.2020.9041149

S. Nkosi, Lloyd Patsika, L. Masisi

{"title":"Development of a low cost rotor position sensor","authors":"S. Nkosi, Lloyd Patsika, L. Masisi","doi":"10.1109/SAUPEC/RobMech/PRASA48453.2020.9041149","DOIUrl":"https://doi.org/10.1109/SAUPEC/RobMech/PRASA48453.2020.9041149","url":null,"abstract":"This paper is concerned with the development of a low cost rotor position sensor for mechanical position dependent applications. An hall-effect sensor is used for the development of a low cost rotor position of the electrical machine. An Arduino Due micro-controller was used for programming and serial synchronous with the hall effect sensor. The developed rotor position sensor is compared with the high cost conventional rotor position sensor. The two sensors were mounted on the shaft of a Synchronous Reluctance Machine for comparison. The rotor position sensor had a resolution of 0.088 degrees. The maximum error was 7° (mechanical) for a range between 50 rpm and 1500 rpm. The low cost position sensor registered a maximum THD of 1.8%, while the conventional high cost encoder had a lower THD at all speeds tested. The developed low cost encoder is estimated to cost approximately 30% of the cost of the conventional position sensor. The proposed low cost position sensor suffers from mechanical mis-alignment between magnet and the hall effect sensor. However, the developed low-cost position sensor is a promising candidate for future position information dependent applications.","PeriodicalId":215514,"journal":{"name":"2020 International SAUPEC/RobMech/PRASA Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129686787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0