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Asymmetric comprehensive compensation method and system of power quality of V/v traction power supply station

A power quality and comprehensive compensation technology, applied in flexible AC transmission systems, reactive power adjustment/elimination/compensation, electrical components, etc. The effect of reducing active capacity, promising industrial application prospects

Active Publication Date: 2017-02-01
XIANGTAN UNIV
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Problems solved by technology

[0004] The present invention provides a V / V traction power supply station power quality asymmetric comprehensive compensation method and system, the purpose of which is to overcome the problem of high cost of power quality comprehensive treatment in the above-mentioned prior art

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  • Asymmetric comprehensive compensation method and system of power quality of V/v traction power supply station

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] A V / V traction power supply asymmetric comprehensive compensation method for power quality, characterized in that a multiple railway power regulator RPC is used to connect between the two power supply arms on the secondary side of the traction transformer, and the multiple railway power regulator RPC Two static var compensators FC are installed on both sides of the RPC, and the two static var compensators FC are respectively connected to the two power supply arms on the secondary side of the traction transformer. Each static var compensator is composed of a capacitor and Composed of inductors; the two power supply arms are 1# power supply arm and 2# power supply arm;

[0029] Among them, 1# static var compensator FC1 includes 3rd and 5th single-tuned filter branches, 2# static var compensator FC2 includes 3rd and 5th single-tuned filter branches ...

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Abstract

The invention discloses an asymmetric comprehensive compensation method and system of the power quality of a V / v traction power supply station. According to the method, active power dynamic balance and reactive power dynamic compensation are achieved by a multi-RPC, and fixed compensation of reactive power and main sub-harmonic governance are achieved by an FC. By a mixed structure, the active capacity is significantly reduced and low-cost and high-capacity dynamic comprehensive compensation is achieved. According to the phasor relationship between primary electric quantity and secondary electric quantity of a V / v transformer, the structure is different from a symmetrical FC structure adopted in a conventional design; an asymmetrical FC structure and an asymmetrical capacity design method are creatively provided; the capacity of a device is further reduced; and the total cost of the device is reduced. According to the system, the power quality problems of a power factor, a negative sequence, a harmonic wave and the like of a V / v traction power supply system can be effectively improved; the cost of the device can also be significantly reduced; and the asymmetric comprehensive compensation method and system have a good industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of electrified railways, in particular to a comprehensive compensation method and system for power quality asymmetry of a V / V traction power supply station. Background technique [0002] The electrified railway load has the characteristics of nonlinearity, asymmetry and volatility, which lead to problems such as harmonics, negative sequence, reactive power and voltage fluctuation in the traction power supply system, which will affect the safe and stable operation of the traction power supply system and power system. The Railway Power Conditioner (RPC) is effective in balancing system voltage, improving power factor, suppressing voltage fluctuation and filtering harmonics, and is an effective comprehensive control method. [0003] Since RPC is an active device, relying solely on RPC for comprehensive treatment will cost a lot, which restricts its industrial application. In order to reduce RPC installation ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/01H02J3/00
CPCH02J3/00H02J3/01H02J3/1821Y02E40/10Y02E40/40
Inventor 罗培黄强马茜许倩
Owner XIANGTAN UNIV
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