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Transient State Estimation for Transmission Systems 输电系统的暂态估计
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177872
A. Castellanos-Escamilla, N. Watson, R. Langella
{"title":"Transient State Estimation for Transmission Systems","authors":"A. Castellanos-Escamilla, N. Watson, R. Langella","doi":"10.1109/ICHQP46026.2020.9177872","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177872","url":null,"abstract":"As measurement and communication technology improves algorithms are being developed to get more useful information from the recorded data. One such technique is transient state estimation (TSE) which estimates the node voltages at unmonitored location from current and voltage waveforms measurements recorded during a transient event. This is useful for determining the sources of disturbances. One of the previous limitations was the lumped representation of transmission lines which limited its application to distribution systems. This paper presents a new distributed parameter transmission line model using numerical integrator substitution approach for modelling the travelling wave transmission line model. The accuracy of the model is investigated for different scenarios. To do so, the proposed algorithm is applied to two test transmission systems. The results show that a good estimation is obtained with the proposed algorithm when long transmission lines are present in the system being estimated.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132947272","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
Important Considerations in Development of PV Inverter Models for High Frequency Emission (Supraharmonic) Studies 高频发射(超谐波)研究中光伏逆变器模型开发的重要考虑
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177924
Dilini Darmawardana, S. Perera, D. Robinson, Jan Meyer, U. Jayatunga
{"title":"Important Considerations in Development of PV Inverter Models for High Frequency Emission (Supraharmonic) Studies","authors":"Dilini Darmawardana, S. Perera, D. Robinson, Jan Meyer, U. Jayatunga","doi":"10.1109/ICHQP46026.2020.9177924","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177924","url":null,"abstract":"In addition to the low order harmonics, power electronic systems tend to emit high frequency emissions (HF) in the range of 2 - 150 kHz where photovoltaic (PV) inverters play an important role. The recent high penetration of PV inverters in electricity distribution networks has necessitated the development of PV inverter models suitable for HF studies. Some of the major concerns associated with this work include selecting a suitable modelling approach, building experimental setups and achieving a compromise between the simplicity and the accuracy of the model. Based on research undertaken using commercially available single-phase PV inverters, this paper presents in detail how the aforementioned concerns can be handled to develop inverter models that are suitable for HF emission studies.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"119 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113944725","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
Harmonic Allocation Allowing for Uncertainty of Distributed Generation in MV/LV Power Systems 考虑分布式发电不确定性的中低压电力系统谐波分配
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177895
J. David, V. Gosbell, D. Robinson, S. Perera, S. Elphick
{"title":"Harmonic Allocation Allowing for Uncertainty of Distributed Generation in MV/LV Power Systems","authors":"J. David, V. Gosbell, D. Robinson, S. Perera, S. Elphick","doi":"10.1109/ICHQP46026.2020.9177895","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177895","url":null,"abstract":"A key component to management of harmonic voltage levels in MV and LV distribution systems is the allocation of harmonic emissions to MV and LV customers. The principals of harmonic emission allocations outlined in IEC Technical Report 61000-3-6 are relatively straight forward to apply when both the capacity of the network and the extent of all future load connections are known. However, allocations are made more complex when distributed generation, typically power electronic based, are added to the mix of customer connections. This added complexity is due to distributed generation potentially impacting the hosting capacity of the network, i.e. enabling more customer connections, and the uncertainty for network planners in quantifying the likelihood of future distributed generation connections, given the prolific growth of renewables. This paper introduces a tapered probabilistic approach for network planners to undertake harmonic emission allocations for MV and LV networks which are likely to host significant levels of renewable based distribution generation. The method is demonstrated using a simplified network model.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121783326","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
Supraharmonics in the presence of static frequency converters feeding a 16 ⅔ Hz railway system 静态变频器为16⅔Hz铁路系统供电时的超谐波
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177901
O. Lennerhag, A. Dernfalk, P. Nygren
{"title":"Supraharmonics in the presence of static frequency converters feeding a 16 ⅔ Hz railway system","authors":"O. Lennerhag, A. Dernfalk, P. Nygren","doi":"10.1109/ICHQP46026.2020.9177901","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177901","url":null,"abstract":"This paper presents measurements in the supraharmonic range at a 70 kV busbar feeding four static frequency converters used in the Swedish railway system. The voltage distortion was analyzed for different operational states of the feeding network and four distinct characteristics were identified. It was found that variations in the operational scenario mainly affected the waveform distortion up to about 5 kHz. As the number of converters in operation increased, a noticeable impact could be seen on the frequency characteristics above 10 kHz. Aside from steady-state measurements, several events were analyzed, and it was found that the waveform following disconnection contained significant distortion, albeit for a short period of time.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"385 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125853233","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
Comparison between Voltage Sag Simulation Methodologies in Distribution Systems 配电网电压暂降仿真方法的比较
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177884
N. Westin, C. A. Guerrero, J. Filho, N. Pereira, P. M. Silveira, T. C. Oliveira
{"title":"Comparison between Voltage Sag Simulation Methodologies in Distribution Systems","authors":"N. Westin, C. A. Guerrero, J. Filho, N. Pereira, P. M. Silveira, T. C. Oliveira","doi":"10.1109/ICHQP46026.2020.9177884","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177884","url":null,"abstract":"Voltage Sags are random occurrence events in distribution networks and, due to the difficulty in providing measurement equipment at many places, capturing associated parameters become a hard task. Besides being random, they are phenomena of low frequency of occurrence within a small time window and cause severe impacts in sensitive loads. In this scenario, fault simulation methodologies such as State Enumeration and Monte Carlo Simulation come to be interesting to estimate the behavior of Voltage Sags. The challenge is to find an optimal pair of values for fault location and fault impedance discretization in State Enumeration Method, and the minimum emulation horizon to be considered for Monte Carlo Simulation. Thus, this paper compares the voltage sags impact estimated by both short circuit simulation methodologies in distribution systems. An IEEE 34 bus modified test feeder was used to assess the behavior of these methodologies. The algorithms were implemented in MATLAB®registered and the fault simulation in DistriView®registered.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132021017","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
Power Quality Considerations in the Planning Phase of Stand-Alone Wind-Powered Micro-Grids 独立风力微电网规划阶段的电能质量考虑
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177937
Soheil Mohseni, A. Brent, Daniel Burmester
{"title":"Power Quality Considerations in the Planning Phase of Stand-Alone Wind-Powered Micro-Grids","authors":"Soheil Mohseni, A. Brent, Daniel Burmester","doi":"10.1109/ICHQP46026.2020.9177937","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177937","url":null,"abstract":"This paper proposes a novel multi-objective optimization modelling framework for the optimal design of stand-alone micro-grids (MGs) with high wind power penetration in the presence of nonlinear loads. The key objective of the proposed modelling framework is to facilitate decisionmaking regarding the optimal sizes of the components of windpowered MGs under both the source-end voltage and load current harmonics, which deteriorate the power quality of the system. The problem is formulated as a bi-objective optimization model to minimize the whole-life cost of the system, whilst minimizing the whole system harmonics distortion level, and is solved using the elitist non-dominated sorting genetic algorithm (NSGA-II). The utopia point on Pareto optimal frontier is also determined using a fuzzy decision-making approach. The applicability and effectiveness of the proposed modelling framework are demonstrated on a representative stand-alone wind-powered MG conceptualized for Stewart Island, New Zealand. The simulation results indicate that the proposed model can effectively address the power quality issues in the planning phase of wind-powered sustainable energy systems serving typical nonlinear residential loads.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131967724","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
Sensitivity of Network Wide Voltage Unbalance Levels to Variations in Unbalanced Installations 网络电压不平衡水平对不平衡装置变化的敏感性
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177931
T. D. Kahingala, S. Perera, A. Agalgaonkar, U. Jayatunga
{"title":"Sensitivity of Network Wide Voltage Unbalance Levels to Variations in Unbalanced Installations","authors":"T. D. Kahingala, S. Perera, A. Agalgaonkar, U. Jayatunga","doi":"10.1109/ICHQP46026.2020.9177931","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177931","url":null,"abstract":"Voltage unbalance (VU) emission assessment is a challenging task due to the complex interactions between the sources of voltage unbalance. Consequently, to account for transferred voltage unbalance from neighbouring busbars, IEC/TR 61000-3-13 has introduced influence and transfer coefficients in the VU allocation and emission assessment process. However, no generalised practical approaches exist to evaluate these coefficients where as IEC guidelines suggest some approximations based on simulations and field measurements. As an alternative, this paper proposes a sensitivity analysis of network VU to unbalanced installations that can be employed in VU emission assessment. The proposed methodology uses readily available inputs and utilises a linearised approach to determine the network wide sensitivity of VU to unbalanced installations which makes it feasible for practical implementation.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"616 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133918465","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 New Method to Identify the Investment Value of Premium Power Supply of Sensitive Users 敏感用户溢价供电投资价值识别的新方法
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177910
Huaying Zhang, Hongxin Li, Qing Wang, Jingwen Ai, Yan Li
{"title":"A New Method to Identify the Investment Value of Premium Power Supply of Sensitive Users","authors":"Huaying Zhang, Hongxin Li, Qing Wang, Jingwen Ai, Yan Li","doi":"10.1109/ICHQP46026.2020.9177910","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177910","url":null,"abstract":"In order to improve competitiveness, the utility began to develop different premium power supply strategies for users. To identify investment value of users is the primary task. This paper proposes five indexes to assess the investment value of the users, including the voltage sag level of the grid, the process immunity level of the equipment, the acceptable level of users, the credit of users and the power demand level of users. The comprehensive parameter immunity time curve area is proposed to analyze the immunity of the users’ equipment to voltage sag. The entropy weight method is used to qualify the demand of premium power of users, and the investment value of premium power supply of sensitive users can be depicted based on the coordinate axis. Lastly, the proposed method is used to identify the investment value of five sensitive high-tech users, the identification results prove the correctness and the feasibility of the proposed method.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123948920","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
Issues and Challenges Related to Interharmonic Distortion Limits 与谐波间失真限制有关的问题和挑战
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ICHQP46026.2020.9177933
J. Drapela, M. Halpin, R. Langella, Jan Meyer, D. Mueller, H. Sharma, A. Testa, N. Watson, D. Zech
{"title":"Issues and Challenges Related to Interharmonic Distortion Limits","authors":"J. Drapela, M. Halpin, R. Langella, Jan Meyer, D. Mueller, H. Sharma, A. Testa, N. Watson, D. Zech","doi":"10.1109/ICHQP46026.2020.9177933","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177933","url":null,"abstract":"This paper reports the issues and challenges behind the proposal to include interharmonic limits in the next revision of the IEEE Standard 519 as discussed within the interharmonic distortion sub-group formed in the framework of the Harmonics WG (519) of the IEEE PES Transmission & Distribution Committee.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121367383","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
Impact of Microgrids on Power Factor measurements 微电网对功率因数测量的影响
2020 19th International Conference on Harmonics and Quality of Power (ICHQP) Pub Date : 2020-07-01 DOI: 10.1109/ichqp46026.2020.9177928
G. Singh, Thomas A. Cooke, W. Howe
{"title":"Impact of Microgrids on Power Factor measurements","authors":"G. Singh, Thomas A. Cooke, W. Howe","doi":"10.1109/ichqp46026.2020.9177928","DOIUrl":"https://doi.org/10.1109/ichqp46026.2020.9177928","url":null,"abstract":"The penetration of Distributed Energy Resources (DERs) on the power system has come with its own set of problems, especially in the power quality (PQ) domain. Such penetration has led to the re-evaluation of various aspects of distribution PQ. While such a re-evaluation has focused on the emission and compatibility limits, in the light of PQ concerns from inverter interfaced generation, traditional PQ indices themselves have received relatively little attention. This paper highlights one such issue with the measurement of power factor (p.f.). A case study has been presented with measurement data from a residential neighborhood in the United States, which has the capability to island from the grid and operate as a microgrid. The power factor in this case shows significant deviations at various times during the day and night. Upon further investigation, the cause was determined to be PV generation during the day and battery cycling during the night. This paper presents the data from field measurements, the ensuing investigation and the broad conclusions. The paper closes with a discussion of implications of these measurements for utilities and the PQ community, especially with regards to the need for a definition of p.f, that more accurately describes impact of DERs on the grid, given that such situations may recur in the future as DERs and microgrids continue to proliferate.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116792170","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
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