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2018 18th International Conference on Harmonics and Quality of Power (ICHQP)最新文献

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Assessment of flicker perturbations in power systems with multiple disturbing consumers 具有多个干扰用户的电力系统闪变扰动的评估
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378847
G. Lazaroiu, N. Golovanov, Luminiţa Elefterescu, M. Roscia, D. Zaninelli
{"title":"Assessment of flicker perturbations in power systems with multiple disturbing consumers","authors":"G. Lazaroiu, N. Golovanov, Luminiţa Elefterescu, M. Roscia, D. Zaninelli","doi":"10.1109/ICHQP.2018.8378847","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378847","url":null,"abstract":"The connection in the electric network of perturbing loads must be done such that aggregating the all disturbance contributions of the loads to not exceed the threshold levels. The results of a flicker monitoring campaign for a period of 1 month, with several power supply configurations, are reported in this paper. The flicker contribution of each perturbing load was determined such that to establish the share of each end-user to the required investment for a mitigating equipment.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"61 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83969736","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 comparison of typical non-invasive method for utility harmonic impedance estimation 公用事业谐波阻抗非侵入估计方法的比较
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378914
Xian Zheng, Yamei Liu, Fei-Yu Chen, Shuangting Xu, Xianyong Xiao
{"title":"A comparison of typical non-invasive method for utility harmonic impedance estimation","authors":"Xian Zheng, Yamei Liu, Fei-Yu Chen, Shuangting Xu, Xianyong Xiao","doi":"10.1109/ICHQP.2018.8378914","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378914","url":null,"abstract":"The proliferation of power electronic equipment brings lots of problems to the power system, one of them is harmonic. Harmonic impedance is an essential parameter to evaluate the harmonic emission level and distinguish the harmonic responsibility when the harmonic level exceeds planning levels. At present, there are a lot of methods to estimate utility harmonic impedance, divided into invasive method and non-invasive method. In this paper, some typical non-invasive methods have been compared, and the simulation system is built in the MATLAB. The background harmonic fluctuation and the different values of utility and customer harmonic impedances are considered to evaluate the performance of the typical non-invasive methods. The simulation results proved that the complex ICA method is the most robust to the background harmonic fluctuation than other methods, but in some special cases, the method based on data selection has a better performance.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"58 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83555708","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: 6
A voltage-only method for assessing harmonic contribution from a customer installation 一种评估用户装置谐波贡献的电压法
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378909
A. Špelko, I. Papič, S. Djokic
{"title":"A voltage-only method for assessing harmonic contribution from a customer installation","authors":"A. Špelko, I. Papič, S. Djokic","doi":"10.1109/ICHQP.2018.8378909","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378909","url":null,"abstract":"This paper presents a simple planning-level method for assessing harmonic contribution from a customer installation to the total voltage distortion at the point of common coupling (PCC) in a considered network. The method consists of three steps, where voltage distortion level before connecting customer installation is first evaluated in terms of the contributions of the network and other connected customers to the PCC distortion and then, after customer installation is connected, in terms of customer contribution to the resulting PCC distortion. For evaluating these contributions, only the changes in harmonic voltages at the PCC are analysed and customer installation is also assessed for the ideally sinusoidal voltage source with no source impedance, where corresponding constant harmonic current sources are used to replace customer installation in the original network, providing additional criteria for disaggregating total PCC distortion into related parts. The presented approach is compared with two other commonly used methods and illustrated on a test network model.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"10 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75506207","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: 6
New indices to evaluate the impact of harmonic currents on power transformers 评价谐波电流对电力变压器影响的新指标
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378885
P. Bagheri, Wilsun Xu, K. Shaloudegi
{"title":"New indices to evaluate the impact of harmonic currents on power transformers","authors":"P. Bagheri, Wilsun Xu, K. Shaloudegi","doi":"10.1109/ICHQP.2018.8378885","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378885","url":null,"abstract":"This paper presents a new concept to quantify the impact of harmonic currents on power transformers. The basic idea is to convert the impact of harmonic currents into the impact of an equivalent additional fundamental frequency current. Two equivalent loading indices are developed accordingly with the support of well-established industry standards. Several analytical examples are presented to demonstrate the merits of the proposed approach. Based on field data, the method has been applied to assess the impact of nonlinear residential loads on distribution transformers. It was found that the impact of residential load harmonics on transformers is approximately proportional to the square of current THD. Other applications of the proposed method include estimating transformer overloading level due to harmonics and determining the rating of a regular transformer that can operate properly for a given harmonic distortion condition.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73119971","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: 8
Improvements of power quality in a microgrid when using LCL filters at VSCs 在VSCs中使用LCL滤波器时微电网电能质量的改善
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378830
Andrés Mauricio Oviedo Pinzón, P. M. Silveira, J. M. de Carvalho Filho
{"title":"Improvements of power quality in a microgrid when using LCL filters at VSCs","authors":"Andrés Mauricio Oviedo Pinzón, P. M. Silveira, J. M. de Carvalho Filho","doi":"10.1109/ICHQP.2018.8378830","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378830","url":null,"abstract":"Measurements based in the IEEE Std 1459–2010 can show the need of applying filters in a microgrid to attend the IEEE Std 1547–2003 requirements related to harmonic pollution in order to maintain the power quality limits. LCL-filters placed on the existing voltage source converters can improve the microgrid power quality, reducing the harmonic pollution in it. This paper applies a design procedure of LCL-filters and the control adjustments on voltage source converters to reduce the harmonic current injected to levels accepted by the IEEE Std 1547–2003. Later, compares measurements under IEEE Std 1459-2010 before and after the LCL-Filters addition to show the reduction of harmonic currents in the microgrid.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"63 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84182615","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
Light intensity behavior of LED lamps within the thermal stabilization period LED灯在热稳定期内的光强行为
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378917
S. Sakar, S. Rönnberg, M. Bollen
{"title":"Light intensity behavior of LED lamps within the thermal stabilization period","authors":"S. Sakar, S. Rönnberg, M. Bollen","doi":"10.1109/ICHQP.2018.8378917","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378917","url":null,"abstract":"Visible changes in the light intensity of lamps, referred to as flicker, are quantified based on definitions such as normalized gain factor and relative light intensity variation. However, those values also change depending on the time after an LED lamp has been switched on. An experiment has been carried out to analyze this phenomenon. A new metric, a “thermal stabilization time”, has been proposed to identify the time to reach steady state light intensity. Although rare, the change in light intensity can reach up to 68% during the thermal stabilization time. Consequently, acquiring data at different intervals can lead to incorrect estimation of critical metrics. Stabilization is an essential factor that should be taken into consideration in LED lamps' measurement. It is recommended by the authors that 60-minute operation is required before acquiring data.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"3 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89728791","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: 11
Harmonic distortion in low voltage grid with grid-connected photovoltaic 光伏并网时低压电网的谐波畸变
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378851
Hedi Dghim, A. El-Naggar, I. Erlich
{"title":"Harmonic distortion in low voltage grid with grid-connected photovoltaic","authors":"Hedi Dghim, A. El-Naggar, I. Erlich","doi":"10.1109/ICHQP.2018.8378851","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378851","url":null,"abstract":"Power electronic converters are being introduced in low voltage (LV) grids at an increasingly rapid rate due to the growing adoption of power electronic-based home appliances in residential grid. Photovoltaic (PV) systems are considered one of the potential installed renewable energy sources in distribution power systems. This trend has led to high distortion in the supply voltage which consequently produces harmonic currents in the network and causes an inherent voltage unbalance. In this study, a typical low voltage grid with high penetration of 3- phase and single-phase PV from southern Germany was modelled using MATLAB/Simulink environment. The characteristics of the load- side harmonic impedances were analyzed, and their harmonic contributions were evaluated for different distortion levels. The effect of the high penetration of PV on the harmonic distortion of both positive and negative sequences was also investigated.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"14 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78290234","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: 10
Physical vs economical power resolutions based on energy flow extrema 基于能量流极值的物理vs经济功率分辨率
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378883
D. Jeltsema, Toon Voss, Hatim Mala
{"title":"Physical vs economical power resolutions based on energy flow extrema","authors":"D. Jeltsema, Toon Voss, Hatim Mala","doi":"10.1109/ICHQP.2018.8378883","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378883","url":null,"abstract":"The understanding of the physical mechanisms be hind the energy flow under nonsinusoidal operating conditions is still one of the most confusing and controversial issues in the power engineering community. Hitherto, an extensive variety of mutually inconsistent power resolutions have been proposed that generally adopt the conventional definition of apparent power as a starting point. This paper approaches the problem from the perspective of the energy flow itself. A simple and intuitive power resolution is presented that generalizes the classical power triangle in terms of instant Pythagorean mean powers that do not rely on the fundamental frequency or the periodicity. This enables to observe the energy flow characteristics from both an economic and a physical perspective.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"29 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74073242","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
Potential power quality impacts on LV distribution networks with high penetration levels of solar PV 太阳能光伏高渗透率低压配电网的潜在电能质量影响
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378890
D. Chathurangi, U. Jayatunga, M. Rathnayake, A. Wickramasinghe, A. Agalgaonkar, S. Perera
{"title":"Potential power quality impacts on LV distribution networks with high penetration levels of solar PV","authors":"D. Chathurangi, U. Jayatunga, M. Rathnayake, A. Wickramasinghe, A. Agalgaonkar, S. Perera","doi":"10.1109/ICHQP.2018.8378890","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378890","url":null,"abstract":"Recent government policy initiatives have significantly increased the number of grid connected solar PV systems in distribution networks. Thus, it is of vital importance to understand the technical impacts of high penetration levels of solar PV systems on the operating performance of these networks. This paper presents an analysis of power quality aspects of an urban low voltage (LV) distribution network with high solar PV penetration levels in Sri Lanka. The study includes three-phase load flow analysis carried out by modeling the selected network in DIgSILENT PowerFactory simulation platform using 15 - minute load data. Effects on net power flows and voltages of the LV network, which have been verified using field measurements, are discussed. Factors influencing the hosting capacity of solar PV are investigated by analysing technical impacts at varying solar PV penetration levels.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"178 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79976599","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: 41
Harmonic analysis based on scica at PCC of a grid-connected micro solar PV power plant 基于scica的并网微型太阳能光伏电站PCC谐波分析
2018 18th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2018-05-01 DOI: 10.1109/ICHQP.2018.8378875
P. S. de Oliveira, M. Lima, A. Cerqueira, C. Duque, D. Ferreira
{"title":"Harmonic analysis based on scica at PCC of a grid-connected micro solar PV power plant","authors":"P. S. de Oliveira, M. Lima, A. Cerqueira, C. Duque, D. Ferreira","doi":"10.1109/ICHQP.2018.8378875","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378875","url":null,"abstract":"This paper presents a harmonic analysis of the voltage and current signals at PCC of a grid connected Micro Solar PV Power Plant. The analysis is performed using an ICA based method for harmonic extraction. The results showed the presence of more than forty harmonic on both current and voltage. The response at time domain, even under time-varying conditions, enables the instantaneous THD calculation.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"210 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80112017","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: 10
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