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Three-level high-voltage high-power water-cooled frequency converter system

A high-power, frequency converter technology, applied in the field of electrical control structural components, can solve the problems that the space utilization of the excitation winding system occupies a large space, poor heat dissipation performance affects the service life of the thyristor, and damages the performance and service life of the frequency converter. Increase the function of dual system switching, improve the effect of RC absorption, and improve the effect of power factor

Pending Publication Date: 2019-03-15
CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of the prior art frequency converter, it is often impacted by surge current and surge voltage, which will seriously damage the performance and service life of the frequency converter; the harmonic interference caused by the ultra-long-distance input of the frequency converter; the excitation The space utilization of the winding system occupies a large space, and the poor heat dissipation performance affects the service life of the thyristor

Method used

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  • Three-level high-voltage high-power water-cooled frequency converter system
  • Three-level high-voltage high-power water-cooled frequency converter system
  • Three-level high-voltage high-power water-cooled frequency converter system

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Embodiment 1

[0030] Example 1: see figure 1 , a three-level high-voltage high-power water-cooled inverter system, including: water-cooled filter cabinet 1, expandable bridge arm parallel inverter cabinet 2, all-digital regulation cabinet 3, water-cooled excitation winding system cabinet 4, water circulation cooling system cabinet 5; The water-cooled filter cabinet 1, the expandable bridge arm parallel inverter cabinet 2, the full digital regulation cabinet 3, the water-cooled excitation winding system cabinet 4, and the water circulation cooling system cabinet 5 are assembled and combined with each other from left to right to form a set A more complete high-voltage and high-power water-cooled inverter system.

Embodiment 2

[0031] Example 2: see figure 2 , as an improvement of the present invention, the water-cooled filter cabinet 1 includes a high-voltage high-power water-cooled reactor 101, a circulating reactor module 102, a spoiler fan 103, and a filter cabinet composition 104; the high-voltage high-power water-cooled The reactor 101 is installed on the lower side of the filter cabinet 104, and is fixed on the channel steel base of the filter cabinet by bolts; the circulating reactor module 102 is installed on the top of the high-voltage and high-power water-cooled reactor 1, through the screw, After the insulating support is clamped and fixed, it is fixed on the left and right fixed beams of the filter cabinet with bolts; the spoiler fan 103 is installed on the upper part of the filter cabinet 104 door, preferably behind the supporting filter group; The power water-cooled reactor 101, the circulating reactor module 102, and the spoiler fan 103 are fixedly installed in corresponding position...

Embodiment 3

[0032] Embodiment 3: see Figure 2-4 , as an improvement of the present invention, the high-voltage high-power water-cooled reactor 101 suppresses surge voltage and surge current, protects the frequency converter, prolongs its service life and prevents harmonic interference, improves the power factor of the frequency converter and suppresses Harmonic current, filtering out harmonic voltage and harmonic current, can not only prevent the interference from the power grid, but also reduce the pollution of the harmonic current generated by the rectifier unit to the power grid; adopt a new type of water and electricity separation, foil winding process reactor, Further solves the heat dissipation problem caused by the high-power reactor, and cooperates with the "double-arm power unit-based inverter" water-cooled heat dissipation system to improve the overall space utilization; the high-voltage high-power water-cooled reactor 101 is installed in the filter cabinet body 104 inner under...

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Abstract

The invention relates to a three-level high-voltage high-power water-cooled frequency converter system, which comprises a water-cooled filter cabinet, an expandable bridge arm parallel frequency converter cabinet, a full digital regulating cabinet, a water-cooled excitation winding system cabinet and a water circulation heat dissipation system cabinet. The water-cooled filter cabinet, the expandable bridge arm parallel frequency converter cabinet, the full digital regulating cabinet, the water-cooled excitation winding system cabinet, and the water circulation heat dissipation system cabinet are mutually assembled from left to right to form a complete high-voltage high-power water-cooled frequency converter system. The water-cooled filter cabinet reduces input high-order harmonics for smoothing filtering and suppresses the harmonic disturbance caused by ultra-long-distance input in a parallel system of bridge legs. The water-cooled excitation winding system cabinet realizes single / double sets of three-phase 6-pulse silicon controlled rectifier excitation winding system functions through different assembly modes of a silicon controlled rectifier module. The scheme of the invention can effectively suppress the harmonic interference caused by the ultra-long-distance input of the parallel system of bridge legs, balance the input current of the bridge leg parallel frequency converter, effectively improve the space utilization, and further provide a more stable operation condition for a frequency converter based on a double-leg power unit system.

Description

technical field [0001] The invention relates to a frequency converter, in particular to a three-level expandable bridge arm parallel connection high-voltage and high-power water-cooled frequency converter, which belongs to the technical field of electrical control structural components. Background technique [0002] At present, the application technology of high-power inverters (CN201711497980.0 invention patent) is relatively mature, and most of them can meet the requirements of modular maintenance, heat dissipation efficiency of power components, and greatly solve the problem of space utilization; through the dual-arm power unit module The internal left and right bridge arms are connected in parallel, and the power unit modules of the double bridge arms are connected in parallel in different ways and quantities, which are flexible and diversified to realize the expansion of various output powers of the inverter and adapt to applications with different output power requireme...

Claims

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Application Information

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IPC IPC(8): H02M7/00H02M1/12H05K7/14H05K7/20
CPCH02M1/12H02M7/003H05K7/1432H05K7/20927
Inventor 谭国俊王浩杨波秦振
Owner CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
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