Method and device for improving supply voltage at tail end of long supply arm of heavy haul railway

Abstract

The invention relates to a method and a device for improving supply voltage at the tail end of a long supply arm of a heavy haul railway. The method is characterized in that: a direct hanging thyristor controlled reactor (TCR)-type static var compensator (SVC) is arranged at the outlet end of a Scott main transformer; a plurality of groups of step-down thyristor switched capacitors (TSCs) are arranged at an autotransformer (AT) end at the tail end of the long supply arm at the same time; and the tail end of the supply arm is compensated by using a step-down TSC grouping mode so as to improve the supply voltage at the tail end. The Scott transformer is arranged in a power supply system of the AT of the heavy haul railway and is provided with a T seat outlet end and an M seat outlet end; the T seat and M seat outlet ends of the Scott transformer are provided with a set of SVC devices consisting of a TCR branch and two fixed capacitor branches FC1 and FC2, wherein FC1 is identical to the FC2, so that the whole SVC can be subjected to derating compensation when the set of devices are maintained; and simultaneously, the step-down TSC groups are arranged in uplink, respectively set as three-time and five-time filter branches, wherein the uplink is a heavy climbing line, and downlink is a descending line.

Description

technical field [0001] The invention relates to a power transmission method and device, in particular to a method and device for increasing network voltage at the end of a long power supply arm of a heavy-duty railway. The international patent classification number is B61F05 / 02, which is mainly used for power transmission and distribution of heavy-duty rail transit system. Background technique [0002] With the rapid development of my country's national economy, higher requirements are placed on the railway transportation capacity, which also makes the traction load of electrified railways continue to increase. For many lines, the voltage level of the traction network is too low under heavy load conditions, which affects the normal traction operation of trains and limits the further growth of traffic volume. [0003] In the traction network, the parallel autotransformer forms the AT power supply mode, which has the characteristics of less voltage and power loss and longer p...

AI Technical Summary

Problems solved by technology

[0011] The problem to be solved by the invention of this patent is: aiming at the deficiency of the voltage loss control method of the end network voltage AT power supply mode of the long power supply arm of the heavy-duty railway, a method that can effectively and comprehensively deal with the network voltage caused by the AT power supply system of the heavy-duty railway is proposed. The method and device for compensating the lost reactive power current and improving the network voltage at the end of the power supply arm

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