2008 International School on Nonsinusoidal Currents and Compensation最新文献

Nonsinusoidal power caused by measurements of grid impedances at unbalanced grid voltages 在不平衡电网电压下测量电网阻抗所产生的非正弦功率

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627510

T. Thanh, S. Schostan, K.-D. Dettmann, Detlef Schulz

引用次数: 10

Natural doubling of the apparent switching frequency using three-level ANPC converter 采用三电平ANPC变换器使视开关频率自然倍增

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627496

D. Floricau, E. Floricau, M. Dumitrescu

引用次数: 87

Fryze - Buchholz - Depenbrock: A time-domain power theory Fryze - Buchholz - Depenbrock:时域功率理论

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627481

V. Staudt

引用次数: 74

New control system of the shunt active power filter 并联型有源电力滤波器的新型控制系统

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627518

R. Strzelecki, M. Wojciechowski

引用次数: 6

Symmetrization of asymmetrical three-phase load supplied from asymmetrical non-ideal voltage source with periodic nonsinusoidal waveforms 周期性非正弦波形的非对称非理想电压源供电的非对称三相负载的对称化

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627500

K. Debowski, M. Pasko

{"title":"Symmetrization of asymmetrical three-phase load supplied from asymmetrical non-ideal voltage source with periodic nonsinusoidal waveforms","authors":"K. Debowski, M. Pasko","doi":"10.1109/ISNCC.2008.4627500","DOIUrl":"https://doi.org/10.1109/ISNCC.2008.4627500","url":null,"abstract":"The problems presented in the paper deal with a three-phase four-wire system. The considered system is composed of: the three-phase asymmetrical voltage source with periodical nonsinusoidal waveforms, inner impedances of the voltage source and asymmetrical linear three-phase loads. In contrast to earlier approaches the voltage source is not symmetrical. In the paper a method of symmetrization of these systems has been proposed. After symmetrization it is possible to obtain symmetrical line currents of the system. Their RMS values and active power losses on source impedances can be lower. Moreover, the source can generate greater active power than before symmetrization. The working point after symmetrization can be obtained by means of connection of a symmetrizing system. The main goal is to use the symmetrizing system composed of LC one-ports, but generally it is necessary to use the active symmetrizing system. Their structure is determined as a result of a synthesis process. In this paper the symmetrization problem has been solved by using the symmetrical components theory and compensation of reactive power for each harmonic of the voltage under consideration.","PeriodicalId":143815,"journal":{"name":"2008 International School on Nonsinusoidal Currents and Compensation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115787809","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

Cooperative design and control of distributed harmonic and reactive compensators 分布式谐波与无功补偿器的协同设计与控制

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627482

E. Tedeschi, P. Tenti

引用次数: 32

Numerical detection of the current instability phenomena due to the balance of the electric machines 由电机平衡引起的电流不稳定现象的数值检测

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627495

D. Olaru, D. Floricau

{"title":"Numerical detection of the current instability phenomena due to the balance of the electric machines","authors":"D. Olaru, D. Floricau","doi":"10.1109/ISNCC.2008.4627495","DOIUrl":"https://doi.org/10.1109/ISNCC.2008.4627495","url":null,"abstract":"The instabilities arising in the power delivery network may cause serious problems for the whole system security. The most difficult detectable event is the energy balance phenomena. This has specific evolution characteristics, which are not so easy to be observed. The paper presents a real type situation, studied on a physically realized model, on a reduced scale. It is based on a permanent magnet synchronous motor. This is susceptible to give similar balance phenomena as conventional loaded equipment. The supply source is tuned as to obtain quasi-stable motion. The current and voltage evolution is represented in the phasespsila plane. To result a smooth enough wave, regression methods are used. In order to obtain useful information about the instability characteristics, special indicator functions are used. They emphasize, on one hand, the relative balance parameters and, on the other hand, the most unstable moment of evolution. This gives a discontinuous evolution for the derivativespsila variation for the current wave. The paper presents, as well, the mathematical background and the methods used for the processing of the measured parameters.","PeriodicalId":143815,"journal":{"name":"2008 International School on Nonsinusoidal Currents and Compensation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126370062","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

Harmonic digital simulation technique on an industrial environment 工业环境谐波数字仿真技术

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627493

M. Dumitrescu

引用次数: 1

Currents’ Physical Components (CPC) concept: A fundamental of power theory 电流的物理成分(CPC)概念:功率理论的基础

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627483

L. Czarnecki

引用次数: 156

The effect of earth fault current harmonics on tripping of residual current devices 接地故障电流谐波对漏电装置脱扣的影响

2008 International School on Nonsinusoidal Currents and Compensation Pub Date : 2008-06-10 DOI: 10.1109/ISNCC.2008.4627489

S. Czapp

{"title":"The effect of earth fault current harmonics on tripping of residual current devices","authors":"S. Czapp","doi":"10.1109/ISNCC.2008.4627489","DOIUrl":"https://doi.org/10.1109/ISNCC.2008.4627489","url":null,"abstract":"The most popular means of protection against indirect contact in low voltage systems is automatic disconnection of supply, since it is a simple and economically attractive way to achieve safety in an electrical installation. As a protective device, residual current devices (RCDs) are commonly used. In certain conditions using the RCDs is obligatory. The widespread application of static converters, especially frequency converters, results in installing RCDs in circuits where nonsinusoidal earth fault current flows. The earth fault current in the output circuit of frequency converters comprises harmonics and interharmonics, whose order mainly depends on the PWM frequency. The level of higher frequency components in the earth fault current may exceed the fundamental one. The nonsinusoidal earth fault current influences tripping of the residual current devices. In the paper, results of the theoretical analysis and the laboratory tests of residual current devices operation are presented and discussed. They prove that in some cases higher frequency components cause improper tripping of the residual current devices and a real hazard of electrocution exists.","PeriodicalId":143815,"journal":{"name":"2008 International School on Nonsinusoidal Currents and Compensation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133136173","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: 35