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2022 20th International Conference on Harmonics & Quality of Power (ICHQP)最新文献

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Analysis of Harmonic Propagation in Power Systems Using Standing Waves 电力系统驻波谐波传播分析
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808551
Bjarne Søndergaard Bukh, C. Leth Bak, Filipe Miguel Faria da Silva
{"title":"Analysis of Harmonic Propagation in Power Systems Using Standing Waves","authors":"Bjarne Søndergaard Bukh, C. Leth Bak, Filipe Miguel Faria da Silva","doi":"10.1109/ICHQP53011.2022.9808551","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808551","url":null,"abstract":"In many countries, the proportion of high-voltage cables is increasing to address the issue of public resistance to transmission system extensions. A major technical challenge in this is the propagation and amplification of existing background harmonics caused by system resonances at lower frequencies.This paper presents a method to explain harmonic propagation in transmission systems using theory of standing waves. By analyzing the characteristics of standing waves, one can find useful information on the nature and extent of harmonic propagation. It is shown that the presented method describes the standing harmonic voltage on power system lines with different topology and therefore, how a simple change in grid configuration affects the harmonic propagation. The results are verified with good agreement against simulations with commercial power system software. Guides to advance this study to meshed systems is given.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114756241","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
Practical Aspects of Accurate Harmonic Voltage Measurements in Transmission Systems 输电系统中谐波电压精确测量的实用问题
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808636
Jan Meyer, R. Stiegler, Simon Konzelmann, J. Kilter
{"title":"Practical Aspects of Accurate Harmonic Voltage Measurements in Transmission Systems","authors":"Jan Meyer, R. Stiegler, Simon Konzelmann, J. Kilter","doi":"10.1109/ICHQP53011.2022.9808636","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808636","url":null,"abstract":"Todays development trends in power systems are characterized by a continuously growing share of power electronics in all voltage levels. This has resulted in an increased awareness for voltage quality not only at distribution level but also in transmission systems. To measure voltage quality parameters at high and extra high voltage, instrument transformers can significantly affect the overall accuracy of the measurements due to their frequency-dependent transfer characteristic. The paper starts with a short introduction of the new challenges and resulting needs related to Power Quality and Electromagnetic Compatibility in transmission systems. Limits of voltage instrument transformers for the accurate measurement of voltage harmonics and general methods for its determination are described and illustrated by examples. Finally, available solutions to ensure accurate voltage harmonic measurements are presented briefly.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126466904","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 Voltage Unbalance Mitigation Technique for Low-voltage Applications with Large Single-phase Loads 大单相负荷低压应用的电压不平衡缓解技术
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808832
S. Negri, G. Superti-Furga, E. Tironi
{"title":"A Voltage Unbalance Mitigation Technique for Low-voltage Applications with Large Single-phase Loads","authors":"S. Negri, G. Superti-Furga, E. Tironi","doi":"10.1109/ICHQP53011.2022.9808832","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808832","url":null,"abstract":"In this paper a voltage unbalance mitigation technique for low-voltage microgrids or feeders in presence of large single-phase loads is introduced. In order to take maximum advantage of the existing hardware, the proposed solution consists of a sequence-based decentralized voltage control to be embedded in three-phase VSC connecting distributed generation to the considered system. Furthermore, a centralized controller is proposed to define optimal negative and zero sequence voltage reference. Control effectiveness is numerically verified considering a low-voltage feeder case study.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"1373 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115812838","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
Investigation of Harmonic Resonance from Reactive Compensation in Hospital Electrical Installations with Magnetic Resonance Imaging (MRI) 磁共振成像(MRI)对医院电气装置无功补偿谐波共振的研究
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808426
João Cardoso das Neves Neto, Carlos Frederico Meschini Almeida, E. Delbone, José Starosta
{"title":"Investigation of Harmonic Resonance from Reactive Compensation in Hospital Electrical Installations with Magnetic Resonance Imaging (MRI)","authors":"João Cardoso das Neves Neto, Carlos Frederico Meschini Almeida, E. Delbone, José Starosta","doi":"10.1109/ICHQP53011.2022.9808426","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808426","url":null,"abstract":"With the advent of outbreaks, health waves, and the advancement of electromedical equipment technology, the concern with the power quality in electrical installations has gained greater attention to the perfect performance of medical equipment. However, effective techniques have been developed that allow the necessary technical requirements to ensure compliance with these facilities. The study investigates the harmonic resonance frequency from reactive power compensation through banks of automatic capacitors applied in an electrical circuit consisting of imaging magnetic resonance (MRI) equipment. Methodologically, the concepts of reactive compensation with comparations to IEC60831-1 are applied for the current of circulating work in capacitors, above 30% of the nominal and the mitigation of the system’s harmonics with implementation ant-resonant filter. However, after compensating the power factor penalty, there was a need for filter dimensioning due to the emergence of harmonic resonances. Thus, for a correct dimensioning of compensations, the concern with harmonics and their consequences are of paramount importance.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132032750","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
Harmonic Selection-based Analysis for High Impedance Fault Location Using Stockwell Transform and Random Forest 利用斯托克韦尔变换和随机森林进行基于谐波选择的高阻抗故障定位分析
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808661
G. N. Lopes, T. S. Menezes, J. Vieira
{"title":"Harmonic Selection-based Analysis for High Impedance Fault Location Using Stockwell Transform and Random Forest","authors":"G. N. Lopes, T. S. Menezes, J. Vieira","doi":"10.1109/ICHQP53011.2022.9808661","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808661","url":null,"abstract":"High Impedance Faults (HIFs) originate from the contact between an energized conductor and a high impedance surface. In distribution systems, the HIFs location is an issue that has not been completely solved due to the low fault current and varying impedance, which inhibits traditional fault location techniques from correctly functioning. Thus, this paper assesses the potential of the Random Forest algorithm to be employed to locate HIFs in power distribution systems. The main idea is based on the frequencies extracted by the Stockwell Transform from the phase and neutral currents measured only at the system substation using real HIF signals, thus performing a power quality data analysis. The results are promising, with high identification rates, even with noisy current signals. Additionally, the methodology can help researchers to better select their datasets for supervised-learning-based HIF location methods.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130760432","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
Utilization of Harmonic Emission Limits by Customer Installations in Low and Medium Voltage Networks 中、低压电网用户装置对谐波排放限制的利用
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808630
M. Pourarab, O. Domianus, J. Meyer, Thomas Naef, R. Rölli, Max Ulrich
{"title":"Utilization of Harmonic Emission Limits by Customer Installations in Low and Medium Voltage Networks","authors":"M. Pourarab, O. Domianus, J. Meyer, Thomas Naef, R. Rölli, Max Ulrich","doi":"10.1109/ICHQP53011.2022.9808630","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808630","url":null,"abstract":"The principle of EMC coordination allocates an allowable harmonic emission to each customer installation. If customers do not utilize their allocated harmonic emission on a larger scale, the existing hosting capacity of the network with regard to harmonic emissions might be under-utilized. This can lead to avoidable costs for either the customers or the network operator, e.g. if unnecessary mitigation equipment is required. This paper characterizes the level of utilization of harmonic emission limits in low and medium voltage networks. For this, a representative set of customer installations in Switzerland is selected, also including renewable generation, storage systems and electric vehicle chargers. Harmonic current and voltage emission limits are calculated according to the applying rules. Data from respective weekly measurement campaign is used to assess the emission levels of customer installations in actual operating modes considering also unbalanced conditions. The utilization of harmonic current and voltage emission limits is presented for the actual operating point of the installations as well as an extrapolated operating point corresponding to the full utilization of the agreed power. Continuous monitored utilization of harmonic emission limits enables the network operators to a more flexible and efficient management of harmonic disturbances and consequently reduction of costs for all stakeholders.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132668621","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
Trend analysis for power quality parameters based on long-term measurement campaigns 基于长期测量活动的电能质量参数趋势分析
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808645
M. Domagk, Jan Meyer, Tongxun Wang, D. Feng, Wei Huang, H. Mayer, Simon Wenig, M. Lindner, Jan-Hendrik Amrhein
{"title":"Trend analysis for power quality parameters based on long-term measurement campaigns","authors":"M. Domagk, Jan Meyer, Tongxun Wang, D. Feng, Wei Huang, H. Mayer, Simon Wenig, M. Lindner, Jan-Hendrik Amrhein","doi":"10.1109/ICHQP53011.2022.9808645","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808645","url":null,"abstract":"Power grids face significant changes, like increase of renewables or large-scale introduction of electric vehicles. This has a significant impact on Power Quality and consequently network operators install an increasing number of Power Quality instruments to monitor their networks. To analyse these large amounts of data in an efficient way, automatic data mining methods are required. This paper presents a method to identify long-term trends in time series of continuous Power Quality parameters, which can support network operators with the early detection of fundamental changes in Power Quality levels. This information can e.g. support the asset management or network planning in optimizing the costs for managing Power Quality levels. The method is applied to field measurements (3 years at 24 sites) taken from Chinese and German 110-kV-network.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114384663","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
Impact of external influences on the frequency dependent transfer ratio of resin cast MV voltage instrument transformers 外部影响对树脂铸造中压互感器频率相关传递比的影响
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808776
R. Stiegler, Jan Meyer
{"title":"Impact of external influences on the frequency dependent transfer ratio of resin cast MV voltage instrument transformers","authors":"R. Stiegler, Jan Meyer","doi":"10.1109/ICHQP53011.2022.9808776","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808776","url":null,"abstract":"Inductive voltage transformers are widely used in medium voltage networks to measure harmonic voltages. The accuracy of these voltage transformers at frequencies other than nominal frequency (50Hz/60Hz) is not yet defined by standards, but can have a significant impact on the overall accuracy of voltage harmonic measurements. Consequently, the accurate assessment of harmonic voltage levels, e.g. for verifying compliance with compatibility levels, planning levels or emission limits, requires knowledge about the frequency-dependent transfer characteristic of the used voltage transformers. This transfer characteristic of a voltage transformer is not constant, but depends on a complex set of influence factors, like temperature, burden, etc. Therefore, within the EMPIR project 19NRM05 IT4PQ, the effects of different external factors on the accuracy of inductive voltage transformers is systematically investigated. This paper shows the influence of selected external factors (temperature, burden and primary voltage) on the frequency-dependent transfer characteristic of resin cast medium voltage instrument transformers.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117204101","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
Filter and Controller Identification for Stability Analysis of a Grid-Connected 3-Phase PV Inverter 并网三相光伏逆变器稳定性分析的滤波器与控制器辨识
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808533
Z. Iqbal, S. Djokic, Jan Meyer, S. Müller, E. Kaufhold
{"title":"Filter and Controller Identification for Stability Analysis of a Grid-Connected 3-Phase PV Inverter","authors":"Z. Iqbal, S. Djokic, Jan Meyer, S. Müller, E. Kaufhold","doi":"10.1109/ICHQP53011.2022.9808533","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808533","url":null,"abstract":"A photovoltaic inverter (PVI) may enter operational instability region based on grid supply conditions, such as the presence of voltage waveform distortions and high grid impedance, especially when the actual power output of the PVI is low. This paper considers evaluation and modelling of one commercially available 3-phase PVI, for which laboratory tests showed instability when it was operating with a low power output and connected to a distorted voltage supply. A full switching model of the considered PVI is developed using simulated and measured frequency-based impedance plots, which are also used to calculate approximate values of the PVI output filter, as well as the type and parameters of its control. Afterwards, the operational stability of the PVI is evaluated using impedance-based and Nyquist stability criteria.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"27 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120818153","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
Assessment of FACTS Devices Nonsinusoidality in Smart Grid 智能电网FACTS设备非正弦性评估
2022 20th International Conference on Harmonics & Quality of Power (ICHQP) Pub Date : 2022-05-29 DOI: 10.1109/ICHQP53011.2022.9808816
E. Sosnina, R. Bedretdinov, A. Ivanov
{"title":"Assessment of FACTS Devices Nonsinusoidality in Smart Grid","authors":"E. Sosnina, R. Bedretdinov, A. Ivanov","doi":"10.1109/ICHQP53011.2022.9808816","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808816","url":null,"abstract":"FACTS-devices are the key elements of a Smart Grid. At the same time the nonlinear nature of FACTS devices causes current and voltage waveforms distortion in the electrical network. The article is devoted to the development of methodology for harmonic and interharmonic components assessment generated by FACTS devices. A mathematical model has been developed for harmonics and interharmonics order assessment in electrical network using the method of signal flow graphs. The developed methodology is investigated on the example of a three-phase six-pulse frequency converter with a salient DC link. The result of the research is a dependence diagram of the harmonics and interharmonics order generated by the frequency converter. The considered approach is universal and can be applied to various FACTS devices taking into account the correction of the transfer function.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124060128","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
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