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Search results for: harmonic
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Year: 2010, Volume: 10, Issue: 3
... dry "High impedance fault detection utilizing incremental variance of 1.0065 1 normalized even order harmonic power", IEEE Transactions on Power fault soil at bus 7 High impedance ... should be noted that in the wavelet packet unsymmetrical behavior of HIF current, even harmonics are analysis, a1 and d1 are called node 1 and 2, respectively ...
182. Induction Machine with Improved Operating Performances for Electric Trucks. A FEM-Based Analysis
Year: 2010, Volume: 10, Issue: 2
... slip characteristics – trapezoidal slots. 0.72 T together with a decrease of the 11th harmonic (the most significant from the spectrum) when the rectangular slot is replaced ... 0.76. The starting Figure 8. Air-gap flux density and content in high order harmonics, torque is obviously small, approx. 2000 Nm, but it can ...
Year: 2010, Volume: 10, Issue: 2
... "GA-Based estimated parameters. The GA method is able to estimate Optimization of Total Harmonic Current Distortion and Suppression parameters in high resolution. of Chosen Harmonics in Induction ... Optimization of proposed method is applicable in off line parameter THD and Suppressing Certain Order Harmonics in PWM Inverters estimation, according to robustness of GA optimization in using Genetic ...
Year: 2010, Volume: 10, Issue: 2
... used by the PMSG is the Park Lm model. By considering only the fundamental harmonic of= Average magnetic inductances the flux distribution in the air-gap of the machine ... by 0  inverter do not include harmonic components. These  33  93 harmonics cause many unwanted phenomena such as noise UL; Line voltage of load, ...
Year: 2010, Volume: 10, Issue: 2
... MW 50-Hz three-phase power into 16.7 Besides the well-known resonances of the railway line Hz. The converter station consists of four converter blocks, voltage, excited by the harmonics of the switching which ensure nï€1 redundancy due to their overload frequency [1 ], but now enforced by the increased cabling of capability, to absorb a ...
Year: 2010, Volume: 10, Issue: 3
... supporting its detection are explained. They are harmonic and non-harmonic current components in all of the based on the ... . In [153], an algorithm consisting of harmonic current algorithm. An adaptive detection method monitoring the ... . Besides, there is not a single method to harmonics generated by high-impedance faults. Reference completely solve the ...
Year: 2010, Volume: 10, Issue: 3
... switching function uses three the inverter operates at high switching frequencies, inputs; undesired harmonic components can be produced. 1) Torque error between actual and estimated values ... system for voltage and position. However, this method is based on expert current harmonics suppression. The results proved that knowledge. Some researchers have proposed a combination ...
Year: 2010, Volume: 10, Issue: 3
... used to drive an asynchronous motor. The proposed circuit has a low input current harmonic content, can ensure the load overcurrent protection and has a better reliability. ... . In the last period, considerable efforts were made to reduce the number of harmonics injected into the system. In Figure 2.Static converter with PWM – VSR order ...
Year: 2010, Volume: 10, Issue: 3
... inject a three phase current into the power supply in order to compensate the load harmonic current, the reactive power A. First order filter and load current imbalance ... allow satisfying simultaneously the Since the PWM converter generates undesirable current two design criteria. harmonics around the modulation frequency and its In essence, the only viable value of ...
Year: 2010, Volume: 10, Issue: 1
... drives [8, proposed method in providing precise power control with minimum distortion and harmonic noises (THDi), and at the 9] are reported. Some ... exposed to low frequency the proposed controller is very simple to derive and implement; harmonics which calls for bigger DC link capacitors. however, it is established on ...
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