Inductor-integrated Hybrid Railway Power Flow Controller
A power flow controller, integrated technology, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problems of unrealized large-scale industrial application, unfavorable system integrated installation, high cost of high-voltage reactors, etc., to achieve a solution Main power quality problems, reduce installation difficulty and investment cost, and improve the effect of system integration
Active Publication Date: 2017-02-22
HUNAN UNIV
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Problems solved by technology
Among them, the static railway power conditioner (hereinafter referred to as RPC) proposed by Japanese scholars has attracted widespread attention due to its excellent compensation performance, but it has not achieved large-scale industrial application due to its high investment cost.
In addition, a conventional RPC needs to be connected in series with a coupled inductor to realize its compensation function. The high-voltage reactor is expensive and occupies a large area, which is not conducive to the integrated installation of the system in traction substations with extremely limited space, which further limits promotion of the system
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[0026] The present invention will be further described below in conjunction with accompanying drawings and examples.
[0027] like figure 1 As shown, the present invention includes a three-phase V / v transformer 1, a step-down transformer 2, an α-phase LC coupling compensation arm 4 (the integrated inductance winding 3 serves as the first inductance and the first capacitor C α connected in series), the β-phase LC coupling compensation arm (the integrated inductance winding 5 serves as the second inductance and the second capacitor C β series connection) 6, back-to-back converter 7. The V / v traction transformer 1 consists of two single-phase transformers T α , T β Composition, single-phase transformer T α The primary side of the primary side is connected to the power grid, the secondary side power supply winding is connected to the traction network and the α-phase LC coupling compensation arm 4, and the secondary side integrated inductance winding 3 is composed of two coils ...
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The invention discloses an inductance integrated hybrid railway power flow controller. A public supply network is changed into both alpha and beta phases of a railway traction network by a three-phase V / v transformer and the alpha and beta phases are respectively connected with alpha-phase and beta-phase LC (Inductance / Capacitance) coupling compensation arms; inductances of the alpha-phase and beta-phase LC coupling compensation arms are integrated into a secondary side of the V / v traction transformer by a non-orthogonal decoupling technology to form alpha-phase and beta-phase integrated inductive windings; the alpha-phase and beta-phase LC coupling compensation arms are respectively connected with two output ends of a back-to-back converter by first and second step-down transformers. The inductance integrated hybrid railway power flow controller adopts the non-orthogonal decoupling technology to integrate the inductances of the coupling arms into the transformer windings and the occupied area of a high-speed railway active compensation system can be reduced; due to adoption of the technical scheme of combining active and passive systems, the capacity of the converter is greatly reduced. The inductance integrated hybrid railway power flow controller is an electrical railway electric energy quality control system with high cost performance.
Description
technical field [0001] The invention relates to the field of power quality of an electrified railway power supply system, in particular to an inductance-integrated hybrid railway power flow controller. Background technique [0002] With the rapid development of electrified railways in my country, power quality problems such as negative sequence, reactive power and harmonics faced by traction power supply systems have become increasingly prominent, reducing the power quality of public power grids and affecting their safe and stable operation. In order to improve the power supply quality of the electrified railway power supply system and improve the safety and stability of the public power grid, engineers and technicians have made various attempts. Commutation power supply is a common high-voltage incoming line method adopted by traction substations in my country to solve the negative sequence problem. However, for traction substations in relatively fragile areas of the power ...
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IPC IPC(8): H02J3/01H02J3/18
CPCH02J3/01H02J3/1878Y02E40/30Y02E40/40
Inventor 胡斯佳李勇张志文陈晓婷彭衍建罗隆福
Owner HUNAN UNIV