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Modeling and control of zero-sequence current in parallel multi-phase converters
2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018), 2002It is known that a zero-sequence circulating current could exist in parallel three-phase converters. This paper firstly presents a survey of present technologies regarding parallel multi-phase converters. Secondly, based on a zero-sequence modeling and control concept, this paper generalizes the concept to parallel N number of M-phase converters, such ...
Z. Ye, D. Boroyevich, F.C. Lee
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Optimal Design of Flux Coupling Differential Zero-Sequence Current Transformer
2020 4th International Conference on Power and Energy Engineering (ICPEE), 2020With the operation of neutral point grounding syste m with small resistance, zero sequence current transformer ha s the problems of huge volume and insufficient accuracy in pra ctical engineering. Using flux constrained zero sequence curren t transformer can solve the problem of crossing three-phase ca ble and reduce the volume of equipment. At present,
Weining Wu +4 more
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Fault Section Identification Based on Per-unit Zero Sequence Current
12th IET International Conference on Developments in Power System Protection (DPSP 2014), 2014Although single phase to ground fault location in non-solid grounded networks has been studied for many years and a lot of research has been done, yet adequate solution for direct fault location of radial distribution network hasn't been made, especially for the distribution network with the neutral point grounded via arc suppression coil.
null Xiangning Lin +7 more
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Analysis and mitigation of excessive zero-sequence harmonic currents in distribution systems
PES T&D 2012, 2012The increased penetration of electronic loads in distribution systems results in more frequently occurring problems for the utilities due to triplen harmonics - a trend that has been confirmed in a recent utility survey conducted as part of DSTAR project 13–5. In this paper, we investigate an inexpensive mitigation option that has been recently applied
Jens Schoene +9 more
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Circulating zero-sequence current control of parallel three-phase inverters
IEE Proceedings - Electric Power Applications, 2006A novel circulating zero-sequence current-control method for common DC-source parallel inverter systems is proposed and implemented in FPGA. The follower inverter can closely track the three-phase discontinuous PWM modulation waveforms of the master inverter and the circulating current caused by asynchronous modulation waveforms can be reduced.
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Methods of Getting Zero Sequence Current in a Single-Phase-to-Ground Fault
Advanced Materials Research, 2012After a single-phase-to ground fault, fault voltage and current information should be sampled accurately for automatic equipments to detect the fault line. And zero sequence current is the very key element to detect the fault line after an earth fault happens. The widely used methods of getting zero sequence current are in details described. The common
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PROTECTION OF ZERO SEQUENCE CURRENT FILTERS IN THE ABNORMAL NETWORK MODES
2018Актуальность темы исследования. Современные тенденции развития приводят к увеличению однофазных электроприемников в системах электроснабжения, потребляющих несинусоидальный ток, что приводит к ухудшению показателей качества электроэнергии. Для устранения негативного влияния используют фильтры различных типов, среди которых фильтры токов нулевой ...
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A Novel Consequent-Pole Contra-Rotating Machine with Zero-Sequence Current Excitation
2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers), 2023Mingyuan Jiang, Shuangxia Niu
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