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Battery-Integrated Multiple-Input Multiple-Output Energy Mixer for Power Packet Distribution System 用于分组配电系统的电池集成多输入多输出能量混合器
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757942
C. Reza, John Long Soon, D. Lu
{"title":"Battery-Integrated Multiple-Input Multiple-Output Energy Mixer for Power Packet Distribution System","authors":"C. Reza, John Long Soon, D. Lu","doi":"10.1109/AUPEC.2018.8757942","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757942","url":null,"abstract":"Power can be delivered in a packet form using a power packet distribution system (PPDS). It is capable of avoiding intermediate voltage conversion stages by sending power packets of different voltage levels on the same power line. A mixer of the PPDS is used to generate PPs of different voltage levels. A four-port converter as a mixer is proposed, which can interface with a renewable energy source, a battery and loads through two power lines simultaneously. The battery storage serves as a buffer to mitigate intermittency of renewable energy sources. PPs can be delivered by configuring the proposed mixer in different modes. The proposed mixer has a bidirectional load port, which can be utilized for power sharing between load ports. The proposed mixer uses a single inductor to achieve a compact design. Experimental results are presented to verify the functionality of the proposed mixer.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133370856","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
Modelling a sustainable future for Queensland’s residential electric power supply 模拟昆士兰州住宅电力供应的可持续未来
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757983
A. Zahedi
{"title":"Modelling a sustainable future for Queensland’s residential electric power supply","authors":"A. Zahedi","doi":"10.1109/AUPEC.2018.8757983","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757983","url":null,"abstract":"The Australia’s electricity prices have increased substantially over the past few years. There are evidences suggesting that running cost of power stations have not changed much, but one of the main reasons for this price increase is because some of the coal-fired power stations in Australia have recently closed. These power stations closures have resulted in reducing supply, so this had contributed to higher retail energy prices. The other main reason for this price increase is because there is very little interest in investment in energy sector, which is due to lack of policy certainty in Australia. When electricity price rises, customers become concerned about its impact on their electricity bills. One option to keep the cost of electricity in long term low is to supply residential electricity by rooftop solar photovoltaic supported by battery storage (stationery of mobile such as electric vehicle (EV)). The objective of this paper is to present the results of a study conducted to prove that solar PV combined with energy storage device offers a much cheaper and reliable electricity for residential homes in Queensland, especially in North Queensland.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115843764","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
Voltage and Frequency Response of Small Hydro Power Plant in Grid Connected and Islanded Mode 并网孤岛模式下小水电厂电压频率响应
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757944
D. Maina, M. Sanjari, N. Nair
{"title":"Voltage and Frequency Response of Small Hydro Power Plant in Grid Connected and Islanded Mode","authors":"D. Maina, M. Sanjari, N. Nair","doi":"10.1109/AUPEC.2018.8757944","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757944","url":null,"abstract":"Hydro-based power is gaining more interests as the penetration level of small-scale hydro power plants are being increased to the medium voltage network. This paper investigates the performance of a single unit small hydropower plant in both grid-connected and islanded operation. The overexcitation and volt/hertz excitation limiters have been included in the study to compare their responses in both modes of operation. The plant is evaluated under different loading scenarios considering both resistive and inductive loads. A PI tertiary control for speed reference setting in islanded operation is introduced in the governor to enable regaining of 50 Hz frequency after load changes. The results obtained from the simulation study show the importance and difference of analysing different loading scenarios both in grid-connected and island modes. Also, the inclusion of PI control in governor aids in returning the frequency to its nominal value.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114556517","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: 7
A Partial Discharge Testing System Based on A 5-Level Converter with Different Control Signals 基于不同控制信号的5电平变换器局部放电测试系统
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8758027
N. Yomkaew, N. Marukatat, P. Yutthagowith
{"title":"A Partial Discharge Testing System Based on A 5-Level Converter with Different Control Signals","authors":"N. Yomkaew, N. Marukatat, P. Yutthagowith","doi":"10.1109/AUPEC.2018.8758027","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8758027","url":null,"abstract":"In this paper, analyses of a partial discharge (PD) testing systems using a voltage source from a 5-level converter with different control signals are presented. The low voltage source with 200 Hz of the test system is generated using the 5-level converter. The converter connected to a high voltage transformer, a partial discharge detection. The LC-filter type is set for the test system. The efficiency of voltage source from the 5-level converter with different control signal topologies, i.e. 5-level square wave, 5-level quasi-square wave, and 5-level sinusoidal pulse width modulation (SPWM) with modulation index (ma) of 1.0. The effect of the topologies to partial discharge test system is presented and compared in cases of the voltage difference, total harmonic distortion (THDv) of the output voltage, and the background noises in the partial discharge testing system with no-load and load test with a potential transformer (PT). It is found that the 5-level sinusoidal pulse width modulation (SPWM) with modulation index 1.0 provides the best performance in cases of the voltage difference and THDv of below 5%, and the background noise of below 2.5 pC.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114972124","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: 3
An Innovative Method for Re-setting Over-current Relays in Active Radial Distribution System 有源径向配电系统过流继电器复位的创新方法
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8758056
M. Bahadornejad, Nicholas R. Merrington, N. Nair
{"title":"An Innovative Method for Re-setting Over-current Relays in Active Radial Distribution System","authors":"M. Bahadornejad, Nicholas R. Merrington, N. Nair","doi":"10.1109/AUPEC.2018.8758056","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8758056","url":null,"abstract":"Integration of Distributed Renewable Generation, into electricity distribution networks can be problematic for existing protection schemes due to the effects on fault current levels. In this paper an intrusive method is used to estimate on-line the Thevenin equivalent networks of upstream and downstream sections of a radial active distribution system. The estimated equivalent networks are then used to calculate the fault currents required for the over-current relays settings. The procedure is applicable to low voltage and medium voltage radial networks. OPAL-RT real time simulations are used to validate the proposed method. The requirements for implementing the developed algorithm are also introduced.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116983741","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
Virtual Power Plant for Improving Power System Protection Issues: Solution to the Problem of Power System Reliability under Distributed Energy Resources 虚拟电厂改善电力系统保护问题——分布式能源下电力系统可靠性问题的解决
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757947
J. Ali, F. Silvestro, M. Jamil
{"title":"Virtual Power Plant for Improving Power System Protection Issues: Solution to the Problem of Power System Reliability under Distributed Energy Resources","authors":"J. Ali, F. Silvestro, M. Jamil","doi":"10.1109/AUPEC.2018.8757947","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757947","url":null,"abstract":"Modern power system is revolving around three major studies: virtual power plants, power system reliability, and distributed energy resources. The three concepts are interlinked in such a manner, that one can affect the other in either positive or negative way. The involvement of wind and solar systems at distribution level aid to power system generation, but cause a major issue of changes in the conventional protection method of power system. These resources, on the other hand, aid virtual power plants, which give relaxation to the system operators for solving energy and ancillary issues with protection being one of them. In other words, these virtual power plants are both the problem creators, and problem solvers. Literature mostly discusses the reliability issues in power system with the use of virtual power plants. The paper discusses the way these virtual power plants can be utilized for improving the reliability issues due to the high involvement of distributed energy resources on the grid. The paper proposes a model of virtual power plant for the indication and isolation of faults in the power grid, and some test cases in practical scenarios. The model is finally validated using different case studies with the objective of enhancing the TSO and DSO visibility to the faults.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116046233","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
Identifying line-to-ground faulted phase in low and medium voltage AC microgrid using principal component analysis and supervised machine-learning 利用主成分分析和监督式机器学习识别中、低压交流微电网线路对地故障相位
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757918
M. Uzair, Li Li, Jianguo Zhu
{"title":"Identifying line-to-ground faulted phase in low and medium voltage AC microgrid using principal component analysis and supervised machine-learning","authors":"M. Uzair, Li Li, Jianguo Zhu","doi":"10.1109/AUPEC.2018.8757918","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757918","url":null,"abstract":"A supervised machine-learning based approach for faulted phase identification in bolted, low- and high-impedance line-to-ground faults using principal component analysis for feature extraction from multiple input signals is presented in this paper. DIgSILENT PowerFactory is used for simulating the underlying microgrid to obtain fault related data, while MATLAB is used for machine learning application. A 15-fold cross validation is applied to the training dataset for evaluation of different machine learning models and the results show supreme performance compared to previous methods.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125742554","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
Relative Influence of Rod Spacing and Length on the Thermal and Resistance Properties of Continuously Loaded Earthing Electrodes 棒间距和长度对连续负载接地电极热阻特性的相对影响
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757919
Nusra Noorudheen, P. Wolfs
{"title":"Relative Influence of Rod Spacing and Length on the Thermal and Resistance Properties of Continuously Loaded Earthing Electrodes","authors":"Nusra Noorudheen, P. Wolfs","doi":"10.1109/AUPEC.2018.8757919","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757919","url":null,"abstract":"Continuously loaded electrodes are a critical component in medium voltage Single Wire Earth Return (SWER) systems. Past electrode failures have encouraged the use of deep bored electrodes which can be expensive. This paper examines the use of multiple driven rod electrodes and explores the relative impact of rod spacing on both the steady state temperate rise and the electrode resistance to earth. A combination of analytical and finite element analysis are applied to determine the spacing requirements to simultaneously satisfy the electrode thermal and resistance constraints. This paper shows that the temperature rise constraints are more onerous than the electrode resistance or earth potential rise constraints.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125083676","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
System Strength and Weak Grids: Fundamentals, Challenges, and Mitigation Strategies 系统强度和弱电网:基础、挑战和缓解策略
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757997
M. G. Dozein, P. Mancarella, T. Saha, R. Yan
{"title":"System Strength and Weak Grids: Fundamentals, Challenges, and Mitigation Strategies","authors":"M. G. Dozein, P. Mancarella, T. Saha, R. Yan","doi":"10.1109/AUPEC.2018.8757997","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757997","url":null,"abstract":"Converter-based renewable energy sources (RES) and battery energy storage (BES) devices that are asynchronously connected to the system are becoming more and more widespread. A number of relevant stability issues, usually in areas with little synchronous generation, are being experienced, particularly in terms of voltage stability. In this context, the scope of this work is to review the key aspects of the so-called “system strength” that is associated with “weak grids” where such instabilities arise, its definitions, assessment metrics, and adverse operational impacts that may emerge. The paper is then discussing two main mitigation strategies to improve short-term voltage stability in weak power systems. The first is to provide voltage stability services by converter-based technologies to support the system voltage in weak areas. The second proposition is to employ FACTS devices to increase system strength. Finally, limitations and challenges regarding the operation of converter-based technologies and FACTS devices in weak grids are presented and followed by key recommendations.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130808849","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: 29
Pulse Width Modulation Switching Analysis for Three Phase Dual Inverter System using Artificial Neural Network 基于人工神经网络的三相双逆变系统脉宽调制开关分析
2018 Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2018-11-01 DOI: 10.1109/AUPEC.2018.8757941
M. Khan, S. Gupta, O. Singh
{"title":"Pulse Width Modulation Switching Analysis for Three Phase Dual Inverter System using Artificial Neural Network","authors":"M. Khan, S. Gupta, O. Singh","doi":"10.1109/AUPEC.2018.8757941","DOIUrl":"https://doi.org/10.1109/AUPEC.2018.8757941","url":null,"abstract":"this paper is presenting artificial neural network based pulse width modulation switching analysis for the three-phase dual two level inverters system with isolated two dc voltage sources. Some applications require power and torque variation, which takes time to improve the overall efficiency and reliability of the system. For such applications, an enhanced switching sequence analysis has presented. This scheme has improved quality of the output voltage and reduces THD in the line voltage. The performance analysis using ANN of this scheme has validated by simulation results.","PeriodicalId":314530,"journal":{"name":"2018 Australasian Universities Power Engineering Conference (AUPEC)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130829401","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
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