Commercial and industrial applications getting ready for direct-current power distribution

Author(s):  
D. Crudele ◽  
T. Key ◽  
A. Mansoor ◽  
F. Khan
Author(s):  
Tadatoshi Babasaki ◽  
Toshimitsu Tanaka ◽  
Kaoru Asakura ◽  
Yousuke Nozaki ◽  
Fujio Kurokawa

2016 ◽  
Author(s):  
T. Kaipia ◽  
J. Karppanen ◽  
P. Nuutinen ◽  
A. Pinomaa ◽  
A. Mattsson ◽  
...  

2015 ◽  
Vol 28 (3) ◽  
pp. 407-421 ◽  
Author(s):  
Dejan Stevanovic ◽  
Predrag Petkovic

Whenever the delivered power is greater than the sum of the registered power at points of common coupling (PCC) the utility will have losses. This paper will show that even in an ideal case, without any abuse of users, the losses occur due to inadequate measurement equipment and to deficient billing policy. Namely, common household power meters register only active energy, while power meters for industrial applications register reactive energy as well. Consequently, the billing policy is based only at one or both values. This approach does not follow the change of the end-user load profile that becomes very nonlinear. Actually, the current trough nonlinear load deviates from sine waveform causing that a part of the delivered power remains invisible for the power distribution system. Therefore, the utility registers significant economic losses. To solve this problem we recommend distortion power to be measured and included into the billing policy. It has not been the case so far because the electric power community has not been aware of the amount of the distortion power in the contemporary grid. Besides, power meters have not been able to measure it. This paper demonstrates how to overcome the obstacle with a minor modification of ordinary electronic power meters. The proposed solution is verified by a set of measurements on different types of loads that are commonly used in households and offices.


IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 149093-149112
Author(s):  
Sathish Kumar Shanmugam ◽  
Sasikala Ramachandran ◽  
SenthilKumar Arumugam ◽  
Sanjeevi Pandiyan ◽  
Anand Nayyar ◽  
...  

2004 ◽  
Vol 70 (3) ◽  
pp. 1833-1835 ◽  
Author(s):  
Jong-Chul Park ◽  
Min Sub Lee ◽  
Dong-Wook Han ◽  
Dong Hee Lee ◽  
Bong Joo Park ◽  
...  

ABSTRACT Vibrio parahaemolyticus, the cause of gastroenteritis in humans, was inactivated by alternating low-amperage electricity. In this study, the application of alternating low-amperage electric treatment to effluent seawater was investigated for the large-scale disinfection of seawater. This method was able to overcome the problem of chlorine generation that results from treatment with continuous direct current. In conclusion, our results showed that alternating-current treatment inactivates V. parahaemolyticus in effluent seawater while minimizing the generation of chlorine and that this alternating-current treatment is therefore suitable for practical industrial applications.


2020 ◽  
Vol 40 (3) ◽  
pp. 38-46
Author(s):  
José Danilo Rairán Antolines

Humans naturally control their surrounding space. However, that capacity has not been fully used to build better intelligent controllers, mainly because the reaction time of a person limits the number of industrial applications. In this paper, the author propose a method to overcome the problem of reaction time for a human in the control loop. This method, called Time Scaling Control, starts by modifying the constant times of the plant’s model to the point where control is comfortable for a human. Then, the controller acquires the knowledge that was expressed during the human control stage and places it in a Neural Network, which controls both scaled and original plants. Time Scaling Control highly improves the control performance compared with a PID, in this case demonstrated by the control of a direct current motor, which cannot be controlled by a human without time scaling control due to the speed of the system.


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