The Dependence of the Pst Indicator on the Rectangular Modulating Signal Frequency for Sinusoidal Voltage in the Power Grid

Author(s):  
Grzegorz Wiczynski
2015 ◽  
Vol 792 ◽  
pp. 8-14
Author(s):  
Gennady Petrovich Kornilov ◽  
Ildar Ravil’evich Abdulveleev ◽  
Timur Rifkatovich Khramshin

The article presents the comparative analysis of influence frequency regulated electric drive and current electric drive to harmonic structure of voltage of power grid. There was obtained the dependence of total harmonic distortion (THD) of curve on loading power for 2 types of valve converters. The effectiveness is shown in use of filter compensating device, connected at low side of converting transformer. There were defined the ranges of filter adjusting for improving THD of voltage curve. The described solutions are performed by the structural modeling method of Simulink packet in Matlab environment.


2020 ◽  
Vol 15 (7) ◽  
pp. 875-883
Author(s):  
Wei Sun ◽  
Lihua Wang

Power equipment is a mechanical precision instrument that requires flexible wiring. In order to solve the problem of narrow cable wiring structure of the medium-voltage distribution network, a photoelectric stabilized device was adopted in the study. The device consists of multiple photoelectric sensors, electronic components, and structural components. Because the system supports different signal frequency bands, the interconnection technology in optoelectronic stabilization can resist electromagnetic interference so that it can further improve the accuracy of the wiring structure. The photoelectric stabilized technology was used in the power supply automatic wiring planning process of power systems. The tracking of contact lines, main radiating lines, and branch lines was performed through a photoelectric stability device. In addition, the radiating line used the ant colony algorithm to construct the radiating line according to the data provided by the device. The contact line was constructed by the Floyd algorithm according to the data provided by the device. Furthermore, the genetic annealing algorithm was introduced to optimize the line wiring calculation process for the convergence problem in the calculation of the line. During the test, by comparing the traditional power grid wiring and power grid wiring based on the photoelectric stability device, it is proved that the wiring method proposed in the study can realize the most optimization with the significantly reduced cost.


2009 ◽  
Author(s):  
David Close ◽  
Kari Babski-Reeves ◽  
Nick Younan ◽  
Noel Schulz

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