Nonstationary Operating Modes of a Switchable Filter-Compensating Plant in an AC Traction Network

It is shown that filter-compensating plants (FCPs) in an alternating-current traction network must be adjustable or have at least two power values in order to provide a reduction in electricity losses at medium loads and the maximum possible increase in the traction network voltage for passing heavy...

Full description

Saved in:
Bibliographic Details
Published in:Russian electrical engineering 2021-12, Vol.92 (12), p.785-790
Main Authors: Serebryakov, A. S., Herman, L. A., Osokin, V. L., Dulepov, D. E.
Format: Article
Language:English
Subjects:
Damping
Electric potential
Engineering
Machines
Manufacturing
Nonlinear differential equations
Processes
Runge-Kutta method
Switching circuits
Traction
Voltage
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is shown that filter-compensating plants (FCPs) in an alternating-current traction network must be adjustable or have at least two power values in order to provide a reduction in electricity losses at medium loads and the maximum possible increase in the traction network voltage for passing heavy trains. A switchable two-stage FCP is considered. The first stage of the FCP has a power of 3 Mvar (sequential connection of two LC sections) and turns on at medium traction loads, and the second stage has a power of 6 Mvar (one LC section) and turns on during heavy train traffic. The transient processes in a two-stage FCP in a 25-kV AC traction network are analyzed. The analysis of dynamic processes is carried out in the Mathcad suite by solving nonlinear differential equations in the Cauchy form by the fourth-order Runge–Kutta method. The current and voltage surges on the capacitors during the shunting of the additional section and the damping resistor to the maximum and zero current are determined. Experimental oscillograph records of the deshunting of the additional section en route from the highest to the lowest power are provided. Recommendations are given for determining optimal moments for switching circuit elements.
ISSN:1068-3712
1934-8010
DOI:10.3103/S1068371221120117