RU2014106435A

RU2014106435A - METHOD FOR DETERMINING THE SHORT-TERMINAL PLACES OF THE ELECTRIFIED TRANSPORT CONTACT NETWORK

Info

Publication number: RU2014106435A
Application number: RU2014106435/11A
Authority: RU
Inventors: Анна Сергеевна Муратова-Милехина; Александр Леонович Быкадоров; Татьяна Алексеевна Заруцкая
Original assignee: Анна Сергеевна Муратова-Милехина; Александр Леонович Быкадоров; Татьяна Алексеевна Заруцкая
Priority date: 2014-02-20
Filing date: 2014-02-20
Publication date: 2015-08-27
Also published as: RU2566458C2

Abstract

1. Способ определения места короткого замыкания неоднородной контактной сети электрифицированного транспорта, при котором в момент короткого замыкания измеряют на одной или смежных тяговых подстанциях напряжение на шинах, токи линий, питающих контактные сети путей межподстанционной зоны с коротким замыканием, и фазовые углы токов, вычисляют значения производных параметров, зависящих от измеренных величин, схемы питания и других условий, и судят о месте повреждения путем реализации вычислительного алгоритма, определяющего зависимость между расстоянием до места повреждения от измеренных и вычисленных производных параметров, отличающийся тем, что схему питания контактной сети в данной межподстанционной зоне между двумя смежными тяговыми подстанциями условно разделяют по длине пути на множество участков, для каждого из которых при расчетных коротких замыканиях в его начале и конце вычисляют расчетные значения величин и производных параметров, аналогичных тем, которые определены по результатам измерений при коротком замыкании, при разных заданных значениях переходного сопротивления в месте короткого замыкания, определяют интервалы изменения всех расчетных параметров в пределах каждого из выделенных участков пути, вносят эти интервалы в базу данных, производят сравнение измеренных величин и производных параметров с интервалами расчетных параметров аналогичных величин из базы данных для каждого из выделенных участков пути и в качестве места короткого замыкания принимают тот участок, для которого число измеренных величин и производных параметров, попавших внутрь интервалов аналогичных расчетны�1. A method for determining the location of a short circuit in a non-uniform contact network of an electrified transport, in which at the moment of a short circuit they measure the voltage on the buses, currents of the lines supplying the contact networks of the paths of the inter-substation zone with short circuits, and phase angles of currents, calculate the values derived parameters that depend on the measured values, the power circuit and other conditions, and judge the place of damage by implementing a computational algorithm that determines the dependence between the distance to the place of damage from the measured and calculated derivatives of the parameters, characterized in that the power circuit of the contact network in a given substation zone between two adjacent traction substations is conventionally divided along the length of the path into many sections, for each of which with rated short circuits at its beginning and at the end, the calculated values of the values and derivatives of the parameters are calculated, similar to those determined by the results of measurements during a short circuit, for different given values of the transition resistance in the place of a short circuit, determine the intervals of change of all calculated parameters within each of the selected sections of the path, add these intervals to the database, compare the measured values and derived parameters with the intervals of the calculated parameters of similar values from the database for each of the selected sections of the path and as the place of a short circuit, take that section for which the number of measured quantities and derivative parameters that fall inside the intervals of similar calculated

Claims

1. A method for determining the location of a short circuit in a non-uniform contact network of an electrified transport, in which at the moment of a short circuit they measure the voltage on the buses, currents of the lines supplying the contact networks of the paths of the inter-substation zone with short circuits, and phase angles of currents, calculate the values derived parameters that depend on the measured values, the power circuit and other conditions, and judge the place of damage by implementing a computational algorithm that determines the dependence between the distance to the place of damage from the measured and calculated derivatives of the parameters, characterized in that the power circuit of the contact network in a given substation zone between two adjacent traction substations is conventionally divided along the length of the path into many sections, for each of which with rated short circuits at its beginning and at the end, the calculated values of the values and derivatives of the parameters are calculated, similar to those determined by the results of measurements during a short circuit, for different given values of the transition resistance in the place of a short circuit, determine the intervals of change of all calculated parameters within each of the selected sections of the path, add these intervals to the database, compare the measured values and derived parameters with the intervals of the calculated parameters of similar values from the database for each of the selected sections of the path and as the place of a short circuit, take that section for which the number of measured quantities and derivative parameters that fall inside the intervals of similar calculated values is the largest.

2. The method according to claim 1, in which the power supply circuit of the contact network in a given inter-substation zone is divided between two adjacent traction substations along the length of the path to many sections, for each of which, when calculating the short circuit at their beginning and end, the calculated values of and derived parameters similar to those that will be determined by the results of measurements with a real short circuit, at different specified values of the transition resistance in the place of a short circuit, the determination of the intervals of all p countable parameters within each of the selected sections of the track and the introduction of these parameters in the database made in advance of the occurrence of a short circuit in the catenary.