Results 151 to 160 of about 268,494 (187)

Closed-Form Determination of the Impedance Locus Plot of Fault Current Limiters: Asymmetrical Faults

IEEE Transactions on Power Delivery, 2020
Closed-form determination of fault current limiter (FCL) impedance for symmetrical faults was reported previously using a mathematically rigorous method. In this paper, extensions of the method to asymmetrical faults are presented. Single line-to-ground faults and line-to-line faults are studied.
Francisco de León, Shayan Behzadirafi
exaly   +2 more sources

The control of the asymmetric ground fault current of the line

2011 International Conference on Advanced Power System Automation and Protection, 2011
During the asymmetric ground fault, the relationship of the current through the line with the inserting voltage and the inserting inductance is analyzed and a novel control method for the asymmetric ground fault current is presented. When the ground fault occurs, the fault current can be controlled to zero and the current through the fault line can be ...
Yu Jiang, Min Huang, ZhiGang Zhang, Heng Wang, QunYin Zheng, HePing Liu   +5 more
openaire   +1 more source

A fast simulation model of PMSG with asymmetric control during an asymmetric grid fault

2016 China International Conference on Electricity Distribution (CICED), 2016
This paper presents a fast simulation method of PMSG, which adopts positive and negative sequence current separate control strategy during an asymmetric grid fault. Based on analysis of fault characteristics, the asymmetric control strategy is developed in PSCAD, aiming to alleviate the adverse effects on converter and grid during an asymmetric grid ...
Guobing Song, Wei Huang, Zhongxue Chang, Xinghua Huang, Ting Wang   +4 more
openaire   +1 more source

Fault-tolerant scheduling for asymmetric communications

5th European Personal Mobile Communications Conference 2003, 2003
A fault-tolerant scheduling system is presented for data broadcasting in asymmetric communication environments for obtaining high communication efficiency for the clients of mobile computing. The coding method that plays a key role in implementing this system is analysed.
openaire   +1 more source

A New Digital Relay for Generator Protection against Asymmetrical Faults

IEEE Power Engineering Review, 2001
Under unbalanced conditions the three phase instantaneous power oscillates at twice the power system frequency. The magnitude of these oscillations can be used as a measure of the system unbalance. This article has introduced a new digital relaying algorithm designed to detect asymmetrical faults by monitoring the sinusoidal oscillations of the three ...
O. Usta, M. Bayrak, M.A. Redfern
openaire   +1 more source

Testing Comparison and Delay Faults of TCAMs With Asymmetric Cells

IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2010
Ternary content addressable memory (TCAM) is one key component in high-performance networking applications. An asymmetric TCAM cell consists of a binary content addressable memory (BCAM) bit and a mask bit. In this paper, we analyze comparison faults of the asymmetric TCAM cell based on BCAM comparison faults.
openaire   +2 more sources

Diagnosability of system faults with propagation under asymmetric invalidation

Microprocessing and Microprogramming, 1988
Abstract We proposed in [1] considering the influence of fault propagation on the diagnosability of an interconnected system. In addition to the parameter t of the number of faulty units, a parameter k was introduced of the number of components consisting of faulty units, so as to capture the effect of fault propagation.
openaire   +1 more source

Control of transformerless MMC-HVDC during asymmetric grid faults

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
Modular multilevel converter (MMC) is the latest converter topology suitable for the transformerless applications in HVDC transmission. HVDC systems are required to remain connected during grid faults, provide grid support and completely decouple the healthy side from the faulty one.
Artjoms Timofejevs, Daniel Gamboa, Marco Liserre, Remus Teodorescu, Sanjay K. Chaudhary   +4 more
openaire   +2 more sources

Symmetrical and asymmetrical fault currents

2004
In the previous chapter, we saw how to calculate the symmetrical fault current. This is important from the RMS heating point of view, but for distribution switchgear engineers, the asymmetrical current is of much greater importance for a number of reasons that will be discussed in this chapter.
openaire   +1 more source

Accurate Calculation of Asymmetrical Fault Currents in Complex Power Systems

IEEE Power Engineering Review, 1981
This paper describes an efficient method for accurate calculation of system asymmetrical short circuit currents for both balanced and unbalanced faults. The method uses a Fourier transform technique to calculate the unidirectional component of the short circuit current and a transient stability program to compute the alternating component. The proposed
A.S. Morched, G.A. Tench, P. Kundur
openaire   +1 more source