نتایج جستجو برای: power quality monitoring

تعداد نتایج: 1464430  

Journal: :journal of optimization in industrial engineering 2013
sonia javadi s.t.a niaki

the most well-known uni-arribute control chart used to monitor the number of nonconformities per unit is the shewhart type c-chart. in this paper, a new method is proposed in an attempt to reduce the false alarm rate in the c-chart. to do this, the decision on beliefs (dob) concept is first uti [1] corresponding author e-mail: [email protected]   lized to design an iterat...

2016
A. K. P. Kovendan D. Sridharan

The rapid increase in the demand for electricity necessitates the power quality improvement for achieving better reliability in smart grids. Wireless Sensor Networks (WSN) is the proven technology for reliable monitoring. This paper proposes a system model for the development and implementation of WSN based communication system for the monitoring of distributed generation, loads and transmissio...

2001
MLADEN KEZUNOVIC YUAN LIAO

Voltage sags are one of the most concerned power quality events in the modern power systems as they often lead to tripping or mis-operation of the customer equipment. The coordination study between the system and the equipment helps alleviate such nuisances. This paper describes new software developments aimed at automated voltage sag characterization and equipment behavior analysis. The propos...

2002
M. Kezunovic Y. Liao X. Xu O. Ozgun Bei Gou A. Abur

Quality of power is becoming a very important requirement in the new, deregulated and restructured power industry [1]. The importance is associated both with a need to have a “cleaner” power delivery due to a variety of sensitive loads and with a goal to provide a premium service to gain a competitive edge. A major part of achieving higher quality of power is the ability for assessing the quali...

Journal: :Marketing Science 2009
S. Hun Seog Yong J. Hyun

T paper investigates the issues concerning a film producer that finances production costs not only by the conventional funding from an institutional investor, but also by “Internet funding,” financing through the Internet from so-called netizen investors. In Internet funding, netizen investors engage in word-of-mouth activities. Assuming that information asymmetry exists between the producer an...

2014
Željko Beljić Bojan Vujičić Ivan Župunski Zoran Mitrović Vladimir Vujičić

Measuring and monitoring of power quality of supplied electric energy are important links in electro-distribution chain. Modern systems used for this purpose are complex. Goal of this paper is to present a new approach to the measurements of power quality, which can achieve equal or better performances using less complicated hardware. In this paper, we have presented the method of measuring ove...

2004
Ali Asheibi David Stirling Sarath Perera Duane Robinson

The rapid increase in the size of databases required to store power quality monitoring data has demanded new techniques for analysing and understanding the data. One suggested technique to assist in analysis is data mining. Data mining is a process that uses a variety of data analysis tools to identify hidden patterns and relationships within large samples of data. This paper presents several d...

2002
Helena Vasconcelos J. N. Fidalgo J. A. Peças Lopes

This paper provides a description of the development of software tools able to deal with system fast dynamic monitoring and determination of preventive control procedures, for a given set of disturbances, in networks with large integration of wind power production. Preventive control is performed through power redispatches, involving also the on/off control of the wind generators. The quality o...

2001
Paulo F. Ribeiro

Power Quality issues associated with isolated, transportation, stand alone, or decentralized power systems are becoming more complex and requiring additional consideration as more advanced generation and load-control led techniques are utilized. Due to the typically low inertia and short-circuit levels, frequency/voltage variations, unbalances and harmonics tend to be amplified. These systems a...

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