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Traction power supply system and method

A technology of traction power supply system and power supply line, applied in AC network to reduce harmonic/ripple, reactive power compensation, harmonic reduction device, etc., can solve three-phase imbalance, grid voltage fluctuation distortion, electric traction power supply system Issues such as safety, stability, and impact on economic operations

Active Publication Date: 2014-11-12
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Claims
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Problems solved by technology

However, since the electric locomotive is a high-power single-phase load, it has the characteristics of nonlinearity, asymmetry, and volatility. Therefore, a large amount of negative sequence, reactive power, and harmonic currents will be injected into the grid during operation, causing the grid voltage to fluctuate. Distortion, three-phase unbalance and low power factor have a serious impact on the safety, stability and economical operation of the electric traction power supply system

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] The embodiment of the invention discloses a traction power supply system and method to realize comprehensive control of negative sequence, reactive power and harmonics of the traction power supply system.

[0038] Such as figure 1 As shown, a system using a SCOTT transformer for traction power supply includes: a first transformer 11, a second transformer 12, a first filter 13, a second filter 14, a power regulator 15, a current detection device...

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Abstract

The invention discloses a traction power supply system and a method by application of a SCOTT transformer, wherein the traction power supply system comprises a first transformer, a second transformer, a first filter, a second filter, a power regulator, a current detection device and a controller; the current detection device is respectively connected with a first power supply wire and a second power supply wire, the controller is respectively connected with the current detection device, the first filter, the second filter and the power regulator, the power regulator is respectively connected with secondary sides of the first transformer and the second transformer, and the first filter and the second filter are respectively connected with secondary sides of the first transformer and the second transformer. By the adoption of the traction power supply system and the method, a comprehensive control on negative sequence, idle work and harmonic wave of the traction power supply system can be realized.

Description

technical field [0001] The invention relates to the technical field of comprehensive management of electric energy quality, and more specifically relates to a system and method for traction power supply using a Scott (SCOTT) transformer. Background technique [0002] In recent years, my country's electrified railway has developed very rapidly, and has the advantages of strong carrying capacity, fast driving speed, high energy saving, and low environmental pollution, which has played a pivotal role in the rapid development of the national economy. However, since the electric locomotive is a high-power single-phase load, it has the characteristics of nonlinearity, asymmetry, and volatility. Therefore, a large amount of negative sequence, reactive power, and harmonic currents will be injected into the grid during operation, causing the grid voltage to fluctuate. Distortion, three-phase unbalance and low power factor have a serious impact on the safety, stability and economical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/30Y02E40/40
Inventor 周方圆黄燕艳文韬吴强蔡蔚石二磊朱建波邓建华龙礼兰邱文俊吴选保彭勃唐建宇张典周靖杨磊毛金平
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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