CN210693774U - Standard power module suitable for cascade type shore power variable frequency power supply - Google Patents

Abstract

The utility model discloses a standard power module suitable for a cascade shore power variable frequency power supply, which comprises an input link, a rectification link, a direct current link, a chopping link part and an inversion link which are connected in sequence; the input link consists of FU1-FU2 input fuses; the rectifying link consists of 6 diodes D1-D6 to form a three-phase half-bridge loop; the direct current link consists of a C1 direct current capacitor, an R1 cement discharge resistor and an R2 grounding resistor; the chopping link consists of 2 IGBTs (insulated gate bipolar transistors) from G9 to G10 and an R3 aluminum shell discharge resistor; the inverter link consists of 8 IGBTs (insulated gate bipolar transistors) from G1 to G8 to form a single-phase half-bridge loop. The utility model discloses the contravariant link adopts the mode of two parallelly connected outputs of IGBT, and limited improvement power module's output capacity has increaseed bank electricity variable frequency power supply's rated power, has satisfied the demand of pier to bank electric capacity.

Description

Standard power module suitable for cascade type shore power variable frequency power supply

Technical Field

The utility model relates to a power module especially relates to a standard power module suitable for cascade type bank electricity variable frequency power supply, belongs to harbour bank base power supply technical field.

Background

According to relevant regulations of a transportation department on wharf shore power, a newly-built wharf needs to plan, design and build a shore-based power supply facility, the built wharf needs to gradually implement the transformation of the shore-based power supply facility, and shore power is used preferentially after a ship arrives at a port.

The high-high shore power frequency conversion power supply adopts a working mode of high voltage reduction, high voltage frequency conversion and high voltage output. The mode adopts a mode that a plurality of alternating-current-alternating-current PWM (pulse width modulation) variable frequency power units of each phase are connected in series, so that direct high-voltage output is realized, and output harmonic waves are effectively inhibited. Because each power unit module comprises an inversion output structure and a rectification function, the multiple of rectification parts is correspondingly realized, and the input harmonic suppression and the output harmonic suppression of the frequency converter are synchronously finished. By utilizing the phase shifting technology, certain sub-output harmonics of each power module are mutually staggered by a certain angle to be eliminated, the output waveform quality is good, and the requirements of harmonic indexes specified by national standards and international standards can be met without filtering measures. At present, the capacity of a high-high shore power variable frequency power supply is generally below 2MW, but with the rise of the wharf throughput, the using amount of the shore power supply is gradually increased, the capacity requirement is also gradually increased, and particularly, the demand of the shore power supply is above 4MVA in large-scale coastal ports.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve the above-mentioned not enough, provide a standard power module suitable for cascade type bank electricity variable frequency power supply, this standard power module rectification function adopts the uncontrollable rectification of diode three-phase, and the contravariant function adopts IGBT controllable, and every uses two parallelly connected uses of IGBT mutually simultaneously, has improved power module's output rated current, has increased rated capacity, has satisfied actual demand.

The above object of the present invention is achieved by the following technical solutions: a standard power module suitable for a cascade shore power variable frequency power supply comprises an input link, a rectification link, a direct current link, a chopping link and an inversion link which are connected in sequence;

the input link consists of FU1-FU2 input fuses;

the rectifying link consists of 6 diodes D1-D6 to form a three-phase half-bridge loop; d1 and D2 form a first rectifier bridge, D3 and D4 form a second rectifier bridge, and D5 and D6 form a third rectifier bridge;

the direct current link consists of a C1 direct current capacitor, an R1 cement discharge resistor and an R2 grounding resistor;

the chopping link consists of 2 IGBTs (insulated gate bipolar transistors) from G9 to G10 and a R3 aluminum shell discharge resistor, wherein the IGBT consists of G9 and G10;

the inverter link consists of 8 IGBTs (insulated gate bipolar transistors) from G1 to G8 to form a single-phase half-bridge loop; g1 and G2 form a first IGBT, G3 and G4 form a second IGBT, G5 and G6 form a third IGBT, and G7 and G8 form a fourth IGBT.

The rectification link rectifies alternating current to a direct current link, and the inversion link inverts direct current voltage into single-phase alternating current for external output.

The utility model discloses can become the direct current with the uncontrolled rectification of the alternating current of electric wire netting side to the alternating current that becomes the constant voltage constant frequency with the direct current contravariant provides power supply for other equipment.

Compared with the prior art, the utility model the advantage be: the utility model discloses the contravariant link adopts the mode of two parallelly connected outputs of IGBT, and limited improvement power module's output capacity has increaseed bank electricity variable frequency power supply's rated power, has satisfied the demand of pier to bank electric capacity.

Drawings

Fig. 1 is a standard power block diagram of a cascaded shore power variable frequency power supply.

Fig. 2 is a hardware internal structure diagram of a standard power module of the cascade type shore power frequency conversion power supply.

Fig. 3 is a hardware external structure diagram of a standard power module of the cascade type shore power frequency conversion power supply.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, a standard power module suitable for a cascade shore power variable frequency power supply comprises an input link, a rectification link, a direct current link, a chopping link and an inversion link which are connected in sequence;

the input link consists of FU1-FU2 input fuses;

the rectifying link consists of 6 diodes D1-D6 to form a three-phase half-bridge loop; d1 and D2 form a first rectifier bridge, D3 and D4 form a second rectifier bridge, and D5 and D6 form a third rectifier bridge;

the direct current link consists of a C1 direct current capacitor, an R1 cement discharge resistor and an R2 grounding resistor;

the chopping link consists of 2 IGBTs (insulated gate bipolar transistors) from G9 to G10 and a R3 aluminum shell discharge resistor, wherein the IGBT consists of G9 and G10;

the inverter link consists of 8 IGBTs (insulated gate bipolar transistors) from G1 to G8 to form a single-phase half-bridge loop; g1 and G2 form a first IGBT, G3 and G4 form a second IGBT, G5 and G6 form a third IGBT, and G7 and G8 form a fourth IGBT.

The rectification link rectifies alternating current to a direct current link, and the inversion link inverts direct current voltage into single-phase alternating current for external output.

As shown in fig. 2 and 3, the hardware structure of the rectification link and the inversion link is shown. In the figure, each rectifier bridge consists of two diodes, in a rectifying link, a first rectifier bridge is D1 and D2, a second rectifier bridge is D3 and D4, a third rectifier bridge is D5 and D6, each IGBT consists of an upper tube and a lower tube, in an inverter link, the first IGBT is G1 and G2, the second IGBT is G3 and G4, the third IGBT is G5 and G6, and the fourth IGBT is G7 and G8;

the first IGBT in the chopping link is G9 and G10, and the rectifying link and the inverting link both contain a direct current capacitor C2 and are connected with the IGBT through a direct current busbar.

The utility model discloses an above do the utility model discloses a concrete implementation mode, the rectification side adopts the uncontrolled rectification of diode, and the contravariant side adopts the mode of two IGBT parallel output, and limited improvement power module's output capacity has increaseed bank electricity variable frequency power supply's rated power, has satisfied the demand of pier to bank capacitance.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (1)

1. The utility model provides a standard power module suitable for cascade type bank electricity variable frequency power supply which characterized in that: the direct current converter comprises an input link, a rectification link, a direct current link, a chopping link and an inversion link which are connected in sequence;

the input link consists of FU1-FU2 input fuses;

the rectifying link consists of 6 diodes D1-D6 to form a three-phase half-bridge loop; d1 and D2 form a first rectifier bridge, D3 and D4 form a second rectifier bridge, and D5 and D6 form a third rectifier bridge;

the direct current link consists of a C1 direct current capacitor, an R1 cement discharge resistor and an R2 grounding resistor;

the chopping link consists of 2 IGBTs (insulated gate bipolar transistors) from G9 to G10 and a R3 aluminum shell discharge resistor, wherein the IGBT consists of G9 and G10;

the inverter link consists of 8 IGBTs (insulated gate bipolar transistors) from G1 to G8 to form a single-phase half-bridge loop; g1 and G2 form a first IGBT, G3 and G4 form a second IGBT, G5 and G6 form a third IGBT, and G7 and G8 form a fourth IGBT.

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