Hybrid modular multi-level railway power conditioner and its control method and system

A modular multi-level, power regulator technology, applied in the direction of output power conversion device, AC power input conversion to AC power output, electrical components, etc., can solve the problems of high cost and poor economic benefit, and achieve cost reduction , safe and reliable operation, and the effect of reducing costs

Active Publication Date: 2022-03-18
新源智储能源发展(北京)有限公司
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Problems solved by technology

[0006] Half-bridge (HBMMC) and full-bridge (FBMMC) have been researched in railway power regulators, but considering the limited operating range of half-bridge HBMMC-RPC, and the corresponding power semiconductor devices, drivers, volume, and heat dissipation of full-bridge HBMMC-RPC And other related auxiliary equipment is twice that of the half bridge, although it has flexibility, but the cost is high in actual engineering application, and the economic benefit is poor

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  • Hybrid modular multi-level railway power conditioner and its control method and system
  • Hybrid modular multi-level railway power conditioner and its control method and system
  • Hybrid modular multi-level railway power conditioner and its control method and system

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Embodiment Construction

[0025] like figure 1 , the hybrid modular multilevel railway power conditioner (HMMC-RPC) of the embodiment of the present invention includes 4 phase units (2 phase units on the rectification side and 2 phase units on the inverter side); , the lower two bridge arms through the bridge arm inductance T X1 , T X2 (X=A, B) in series, the midpoints AB and A′B′ of the bridge arms are respectively connected with the AC traction network alfa and beta power supply arms (the first power supply arm and the second power supply arm) on both sides; the upper and lower bridge arms Both are connected in series by F full-bridge sub-modules (FB) and (N-F) half-bridge sub-modules to realize multi-level output. Using the combination of half-bridge and full-bridge hybrid sub-modules, HMMC-RPC can realize over-modulation operation, and the range of modulation m is 0-2F / (N-F).

[0026] figure 2 It is the calculation schematic diagram of the HMMC-RPC compensation current command. The active curr...

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Abstract

The invention discloses a hybrid modular multilevel railway power regulator and its control method and system. The hybrid modular multilevel railway power regulator includes four parallel phase units; the phase units are composed of the above The two lower bridge arms are inductively connected through the bridge arms; the upper and lower bridge arms are connected in series by multiple half-bridge sub-modules and full-bridge sub-modules; the midpoint of the bridge arm of the phase unit is connected to the AC traction network. The hybrid modularized multi-level railway power regulator in the present invention adopts half-bridge and full-bridge sub-modules to increase the modulation degree of the converter, and effectively improves the problem of RPC over-modulation caused by the voltage rise of the traction network.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a hybrid modular multilevel railway power conditioner (HMMC-RPC) and a control method thereof. Background technique [0002] With the substantial improvement in the manufacturing level of power semiconductor devices, modular multilevel power converters have developed rapidly in high-voltage and high-power application scenarios. In recent years, with the increase of train speed and the construction of a large-scale railway network, the demand for high-voltage and large-capacity railway power regulators is increasing, and modular multi-level railway power regulators have been widely used. [0003] The traditional RPC front-end is connected to the single-phase AC grid through a power frequency transformer, and multiple back-to-back converters are connected in parallel. Due to the relatively large transmission capacity, the volume and weight of the power frequency transformer become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458
CPCH02M5/458
Inventor 马伏军丁红旗周发云章程周思邈韩蓉徐千鸣匡玉麟
Owner 新源智储能源发展(北京)有限公司
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