2021 IEEE Southern Power Electronics Conference (SPEC)最新文献_第6页

Smart Switch for Solar Renewable Sources at the Point of Common Coupling (PCC) in MV and LV Networks 中低压电网共耦合点(PCC)太阳能可再生能源智能开关

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709457

Remmy Musumpuka, D. Dorrell

{"title":"Smart Switch for Solar Renewable Sources at the Point of Common Coupling (PCC) in MV and LV Networks","authors":"Remmy Musumpuka, D. Dorrell","doi":"10.1109/SPEC52827.2021.9709457","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709457","url":null,"abstract":"The escalation in power usage of green energy globally and the demand for green energy sources has necessitated the growth of distributed renewable energy generation in an effort to reduce greenhouse gas emissions. The ever increasing electricity tarriffs in South Africa has given rise to a rapid rollout of renewable energy and subsequently has led many household to self generate instead of relying on the power utility only. Solar is the most popular distributed renewable energy that is used by many households in South Africa. Solar energy generation pattern is highly predictable and has a high coincidence factor nearly 100% in a given small area. Because of high coincident factor of solar, low vltage (LV) networks are therefore prone to thermal overload and overvoltage in residential areas during the mid day. To avoid overloading and overvoltages on LV residential networks customers on shared transformer are limited to generate 25% of their individual load capacity as per statutory requirement in NRS097. Many of the household have installed renewable generators without complying to the 25% requirement and it is difficult for the utility to manual monitor all customers whether they comply or not. In this paper, we propose a smart switch that address this challenge and we outline the parameters to consider in relation to the NRS 097 as per grid codes in South Africa. This then enables us to devise a smart and automated interface between the renewable solar power generator and the public utility grid with the capability of having real-time intelligence to active/reactive power as well as the voltage produced by means of IEC 61850 communication protocol interface","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133384749","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

Power Flow Analysis of Addis-Djibouti Railway Power Supply System Using ETAP 基于ETAP的亚吉铁路供电系统潮流分析

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709442

Mebratu Delelegn, Ravikumar Hiremath, C. S. Reddy

{"title":"Power Flow Analysis of Addis-Djibouti Railway Power Supply System Using ETAP","authors":"Mebratu Delelegn, Ravikumar Hiremath, C. S. Reddy","doi":"10.1109/SPEC52827.2021.9709442","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709442","url":null,"abstract":"The electric railway system represents one of the largest sources of unbalances in the three phase power system. As the traction load of electrified railway belongs to high- power nonlinear single-phase load, it will bring power quality problems such as harmonics and three-phase unbalance to the power system after being connected to the power grid. Therefore, it is necessary to evaluate the impact of the electrified railway operation under different conditions on the power quality of the system substation. In this paper a detail study of power flow analysis and an overview of the power quality for Addis-Djibouti railway line by taking Adegala and Hurso 230kV traction substation as case study is presented. The power flow analysis is done for determining the operation of existing system and also in planning the future expansion of the power system. A case study of modeling and simulation of the actual Adegala and Hurso 230kV traction substation were implemented with the Electrical transient analyzed programme (ETAP) software. Harmonic voltage and current calculations were made to determine whether the injected harmonic currents from the train loads caused unacceptable overvoltage at the point of common coupling (PCC). The simulation results showed that the total harmonic distortion (THD) of voltage is the highest at the point of the traction substation where the traction load is connected. The above mentioned harmonics in the THD are higher than the limits specified by IEEE standards 519-1992.The power flow analysis result shows that the bus voltages outside their specified limits of 95%-105%.Analysis for pre and post contingency event was carried out and the result shows that the system does not have enough redundancy to withstand any fault line voltage.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127297880","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: 1

A Power Selective Control of Versatile Wireless Vehicle-Grid-Home Power Interface (VW-VGH-PI) 通用无线车-网-户电源接口(VW-VGH-PI)的功率选择控制

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709488

Lei Wang, W. Tian, U. Madawala, Jiangtao Yang

{"title":"A Power Selective Control of Versatile Wireless Vehicle-Grid-Home Power Interface (VW-VGH-PI)","authors":"Lei Wang, W. Tian, U. Madawala, Jiangtao Yang","doi":"10.1109/SPEC52827.2021.9709488","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709488","url":null,"abstract":"In vehicle-grid-home (VGH) systems, bidirectional wireless power transfer (BD-WPT) systems are gaining popularity, which offers considerable advantages in terms of safety and convenience. However, both nonlinear household appliances and EV charging system can easily cause the power quality problems such as low power factor, harmonic pollution, etc. A new versatile wireless vehicle-grid-home power interface (VW-VGH-PI) topology is proposed, comprising a power quality control converter (PQCC) between the grid and the wireless power transfer (WPT) system. New operating modes for a VW-VGH-PI are also proposed for active power interchange and reactive and harmonic power compensation. Based on the pre-designed capacity of PQCC, a selective power control method is proposed to limit the amount of active, reactive, and harmonic power passing through the PQCC for the heavy loads. In this paper, the structure, operation modes and selective power control are proposed for VW-VGH-PI. Simulation results are validating that the VW-VGH-PI can be used to selectively regulate the power flow among the vehiclegrid-home system.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121091302","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

Steady-state and dynamic performance of new bidirectional Marx DC-DC converter for wind power collection scheme 用于风力发电集电方案的新型双向Marx DC-DC变换器的稳态和动态性能

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709308

S. Alagab, S. Tennakoon

引用次数: 0

Stability Analysis of Wind Power Plant with Reactive Power Compensation Device Considering Parameter Perturbation 考虑参数摄动的无功补偿风电场稳定性分析

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709477

Yuan Qiu, Yanbo Wang, Zhe Chen

引用次数: 1

Distribution Network Optimization by Optimal Sizing and Placement of D-STATCOM using Teaching and Learning Based Optimization Algorithm 基于教与学的优化算法优化D-STATCOM的配电网尺寸与布局

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709447

Azmerawu Argawu Elende, M. G. Gebremichael

{"title":"Distribution Network Optimization by Optimal Sizing and Placement of D-STATCOM using Teaching and Learning Based Optimization Algorithm","authors":"Azmerawu Argawu Elende, M. G. Gebremichael","doi":"10.1109/SPEC52827.2021.9709447","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709447","url":null,"abstract":"Distribution system is a part of an electric power system, which links the high voltage transmission networks with the end consumers. This work offers the way of improving the performance of the distribution network by improving voltage profile and reduction of power loss via injecting reactive power through the network. This study has been conducted on Aposto feeder of Yirgalem distribution network (Ethiopia) for steady-state constant load model. In this work, the first condition has aimed to find the best optimal D-STATCOM sizing and placement by using Teaching and Learning Based optimization (TLBO). Results obtained have been compared with those of the conventional optimization techniques reported in literature. As stated, the TLBO method performs better in terms of reducing both real and reactive power losses and improvement of voltage profile. The model has been formulated to minimize the total cost of the network by determining the optima of the substation locations and power, the load transfers between the demand centers, the feeder routes and the load flow in the network subject to a set of constraints. From the point of view of economic evaluations, the proposed approach is cost-effective. Generally, the simulation results show that the proposed technique is effective to maintain all bus voltage magnitudes within the IEEE acceptable limit and thereby reducing power losses significantly. In this research D-STATCOM control is developed based on artificial intelligence (AI) using artificial neural network (ANN), which depends on optimum values obtained by TLBO.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114820389","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

Model Predictive Control of a Z-Source Power Converter for Wireless Power Transfer Applications 用于无线电力传输的z源功率转换器的模型预测控制

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709453

E. Piedrahita-Echavarria, A. Escobar-Mejía, W. Gil-González

引用次数: 1

Mitigating In-rush Currents for Induction Motor Loads 减轻感应电机负载的涌流

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709484

M. Habyarimana, Remmy Musumpuka, D. Dorrell

{"title":"Mitigating In-rush Currents for Induction Motor Loads","authors":"M. Habyarimana, Remmy Musumpuka, D. Dorrell","doi":"10.1109/SPEC52827.2021.9709484","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709484","url":null,"abstract":"Power loads can have high starting. These can be a serious source of concern in weak grids. This problem is envisaged to be exacerbated by the rollout of smart microgrids. When a high power induction motor is turned on, its inrush current drawn can be more than ten times the full-load current. This transient current can cause problems in weak grid connections. The increased current is due to both power required to start the load and the increased reactive power demand during the starting process. To protect the grid connection as well as the load, energy storage units can be used to compensate for the increased power requirement. A more pragmatic approach is to reduce the reactive power requirement using tuned compensation capacitors in order to reduce the inrush current. The aim of this work is to address the selection, calculation and switching of the capacitor bank for reactive power compensation. This first requires the study of the reactive power drawn by an induction motor during starting. The capacitances are calculated and switched on to compensate the starting transient and disconnected when the machine has run up to speed using a point-on switching approach that reduces the switching transient.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131525830","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

Enhanced Control Strategy of Back-to-Back Interfacing Converters Between Microgrid and Utility 微网-公用事业背靠背接口变流器的增强控制策略

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709483

Y. P. Y. Deng, Jinjun Liu, Ronghui An, Zeng Liu

{"title":"Enhanced Control Strategy of Back-to-Back Interfacing Converters Between Microgrid and Utility","authors":"Y. P. Y. Deng, Jinjun Liu, Ronghui An, Zeng Liu","doi":"10.1109/SPEC52827.2021.9709483","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709483","url":null,"abstract":"To facilitate needed active and reactive power flow between utility and microgrid, this research presents an enhanced power flow control of back-to-back interfacing converters between microgrid and utility. The system can operate to distribute real and reactive power equally between the utility and the microgrid based on the microgrid load power requirement. The open-loop power control proposed by Ritwik Majumder et al. relies on knowing the point of common coupling (PCC) voltage amplitude $(V_{P})$, angle $(delta_{P})$, and reactance $(X_{G})$. These parameters may not be available due to the considerable distance between the PCC bus and the back-to-back interfacing converters. These flaws are addressed in the method of control used in this paper. Besides, a harmonic compensation strategy is incorporated in the power control of a back-to-back interfacing converters to improve the microgrid PCC voltage quality, which has been deteriorated by nonlinear loads connected to the PCC bus. In microgrid DGs inverters, traditional droop control is used to provide power sharing for the remaining load demand. To lessen the voltage dip in the grid, a low-voltage grid support, also known as dynamic grid voltage support, is incorporated in the grid side converter of back-to-back converters. The grid voltage dip is reduced by the reactive power injection. The control techniques are verified using simulation in PSCAD software.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128081704","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: 1

Electrifying Fishing for Rural Electrification 电气化渔业促进农村电气化

2021 IEEE Southern Power Electronics Conference (SPEC) Pub Date : 2021-12-06 DOI: 10.1109/SPEC52827.2021.9709438

J. Ehnberg, E. Hartvigsson, Isak Monrad-Aas

引用次数: 2