IEEE Transactions on Power Delivery

As closure to the discussion on "Adaptive noncommunication protection of double circuit line systems" (see ibid., vol.17, p.43-49, 2003), the authors thank the discusser, M. Sanaye-Pasand (see ibid., vol.18, no.2, p.657, 2003) for his interest in the paper and valuable comments. View full abstract»

The latest of a series of classified lists of power system relaying references, begun in 1927, is presented. This bibliography is in continuation to the bibliographies of relay literature, which were published previously and are contained in the following volumes of the IEEE Transactions. View full abstract»

The authors of the original paper (see ibid., vol. 18, p.387-92, 2003) studied the harmonic-flicker effect and show that, under different conditions, the modulation of voltage harmonic components might cause flicker in voltage supply even if the harmonic distortion accomplishes the compatibility levels proposed in the different international standards. The author of this paper argues that the resu... View full abstract»

The author believes that the original authors should be commended for their interesting paper on transformer modeling (see ibid., vol.17, p.969-76, 2002). They have proposed an electromagnetic (EM) transients model with parameters determined by measurements. The model is intended to describe the transformer's behavior at the high frequencies of lightning surges and of particular interest is the tr... View full abstract»

In the original paper (see ibid., vol.17, p.983-90, 2002), it was shown that three-phase transformers with three-limb cores are commonly used in power systems. Therefore, it is important to analyze the (/spl lambda/-i) characteristics for the three-limb and the zero-sequence (/spl lambda//sub 0/-i/sub 0/) characteristics characteristics at no-load, symmetric, and asymmetric loads. The original aut... View full abstract»

In the original paper (see ibid., vol.17, p.983-90, 2002), the authors addressed the complicated issue of balanced and unbalanced DC currents in asymmetric three-phase transformers with three limbs. This discussor requests the original authors' comments to a number of queries. View full abstract»

The author argues that the main contribution of the original paper (see ibid., vol.17, p.983-90, 2002) is the definition of symmetric /spl lambda/-i characteristics for asymmetric three-phase transformers with three limbs. The analysis shows that such transformers have magnetizing currents with more than one maximum and minimum. Such three-limb transformers are relatively insensitive to the genera... View full abstract»

The author briefly comments on the paper by A.L. Orille Fernandez at al. on a new neural network-based approach for power transmission line protection (see ibid., vol.17, p.894-900, 2000) asks for comments by the authors on six points raised by the paper. View full abstract»

The author comments on the paper by J. Ma et al. (see ibid., vol.17, p.881-5, 2002), pointing out the practical aspects to be considered for actual conditions in the field. View full abstract»

The author comments on the paper by S.L. Chen et al. (see ibid., vol.17, p.1136-41, 2002) on "High temperature amapacity model for overhead conductors." In particular the author comments on the solar heating and wind parameters effects. View full abstract»

The authors comment on the paper by Y. Zhu et al. on "Adaptive power flow method for distribution systems with dispersed generation" (see ibid., vol.17, p.822-7, 2002) and ask the original authors for their comments on two points raised by the paper. View full abstract»

The author comments on the paper by A. Gaudreau et al. on no-load losses in transformer under overexcitation/inrush-current conditions (see ibid., vol.17, p.1009-17, 2002). The author asks the authors to answer seven questions related to the paper. View full abstract»

The author discusses the original paper "Evaluation of the Potential for Power Line Carrier (PLC) to Interfere With Use of the Nationwide Differential GPS Network" (J.M. Silva et. al., see ibid., vol.17, p.348-52, 2002), asking several questions as to the accuracy of the original paper. View full abstract»

The author discusses the original paper "Use of Global Positioning System (GPS) receivers under power line conductors" by J.M. Silva et al. (see ibid., vol.17, p.938-44, 2002), by asking three questions on the content of the original paper. View full abstract»

In this paper, the author discusses the original paper "A New Protection Scheme for Fault Detection, Direction Discrimination, Classification, and Location in Transmission Lines" (see ibid., vol. 17, p.43-42, 2003). In that paper, the original authors proposed a new transmission line fault protective scheme using synchronized phasor measurements through global positioning system (GPS) satellites. ... View full abstract»

The author discusses the original paper "Frequency Characteristics of Wavelets" by C. Parameswariah et al. (see ibid., vol.17, p.794-99, 2002), arguing that it is a misunderstanding that any wavelet is suitable for any signal and any applications. He details how choosing or designing the right wavelet is crucial for a successful WT application. View full abstract»

The authors discuss the original paper (see ibid., vol.17, p.279-85, 2002) and argue that the original authors are to be commended for their contribution in the area of probabilistic aspects of power system harmonics. They describe how they presented a concise but comprehensive and useful review in the paper of modeling for harmonic summation and propagation. As a discussion, they would like to ad... View full abstract»

The discusser congratulates the authors of the original paper ("Adaptive noncommunication protection of double circuit line systems", see ibid., vol.17, p.43-49, 2003) for their interesting contribution to the increasing literature on power system transmission line protection. Their paper was a sequel to earlier papers by the first author investigating various noncommunication based protective sch... View full abstract»

The authors discuss the original paper "An Evaluation of Some Alternative Methods of Power Resolution in a Large Industrial Plant" by J-H.C. Pretorious et al. (see ibid., vol. 17, p.1052-9, 2000), arguing that the authors have presented another comparison of some of the most popular definitions for power under nonsinusoidal conditions. They detail how there is already a long list of publications s... View full abstract»

This paper provides a complete method to solve the defects of spectrum analysis for discrete signals. Many researches had issued to deal with the defects of fast Fourier transform (FFT). Those methods may cause the characteristics of original signal altered, or solve this problem in part only. The defects of spectrum analysis cannot be solved efficiently and completely by those methods. These defe... View full abstract»

This paper presents a new method to evaluate power system unbalance in the presence of harmonic distortion. The balanced, the first unbalanced, and the second unbalanced components are obtained from the original three-phase current and voltage phasors of each harmonic component. The equivalent root-mean-square (RMS) value of three-phase voltage and current is then decomposed into the balanced fund... View full abstract»