CN217406380U - Power module for GE fan - Google Patents

Abstract

The utility model belongs to the technical field of fan frequency conversion system power module, especially, used power module of GE fan has the condition problem of damage, inefficacy to GE unit converter IGBT, now proposes following scheme, and it includes the IGBT body, the adapter plate is installed at the top of IGBT body, water-cooling radiator is installed to the bottom of IGBT body, the both sides of IGBT body fixed mounting respectively have the interchange to be arranged and the direct current is female arranges, the equal fixed mounting in both sides of IGBT body has insulating baffle. The utility model reduces IGBT malfunction and failure condition of active clamping circuit, increases Sunbber capacitance, and prevents damage caused by too high IGBT terminal voltage through redesign and optimization of IGBT unit adapter plate; through the optimization to the female row of the stromatolite, can reduce the influence of miscellaneous sense parameter to the IGBT, the on-the-spot practicality has been increased to the optimization of water-cooling base plate and insulating barrier simultaneously.

Description

Power module for GE fan

Technical Field

The utility model relates to a fan frequency conversion system power module technical field especially relates to an used power module of GE fan.

Background

GE1.5MW unit of wind-powered electricity generation field installation, GE unit converter IGBT have the condition of damaging, inefficacy, consequently need to be to wind-powered electricity generation field GE unit IGBT unit inefficacy condition and the relevant data acquisition condition in scene, to failure point and inefficacy reason analysis, distribute through GE fan converter overall structure and walk line and dynamic experiment test verification, further find the reason that the IGBT unit became invalid, targeted the optimization scheme that has proposed feasible, develop one set of neotype IGBT equipment, further improve fan frequency conversion system's safety and stability.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the condition shortcoming that GE unit converter IGBT exists damage, inefficacy, and the used power module of GE fan that proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a used power module of GE fan, includes the IGBT body, the adapter plate is installed at the top of IGBT body, water-cooling radiator is installed to the bottom of IGBT body, the both sides of IGBT body fixed mounting respectively have to exchange female arranging and the female arranging of direct current, the equal fixed mounting in both sides of IGBT body has insulating baffle.

Preferably, the alternating current busbar and the direct current busbar are both integral laminated busbars.

Preferably, the insulating baffle is fixedly connected with the IGBT body through bolts.

Preferably, the insulating baffle is of a U-shaped structure.

Preferably, the water-cooling radiator comprises a water-cooling substrate, and the water-cooling substrate is connected with the IGBT body.

Compared with the prior art, the utility model has the advantages of:

(1) structure optimization: the internal structure of the water-cooling substrate is improved, the heat dissipation efficiency of the water-cooling substrate is improved, and the working temperature of the IGBT module is reduced; an integral laminated busbar with brand new design is adopted to replace a split type busbar, so that the IGBT is prevented from being damaged by switching on and off spike pulses;

(2) electrical loop optimization: the design of a hardware circuit is optimized, a brand new circuit design scheme is adopted, the anti-interference capability of a circuit board is enhanced, the reliability and the stability of a power unit are improved, the problem of damage of the power unit caused by circuit board faults is solved, a buffer absorption circuit is added, and overvoltage impact of IGBT turn-off peak voltage on the IGBT is inhibited;

(3) optimizing a processing technology: the power module is prevented from being damaged by severe working conditions and environments by adopting an anti-corrosion, moisture-proof and dustproof process, and the service life of the power module is prolonged;

the utility model reduces IGBT malfunction and failure condition of active clamping circuit, increases Sunbber capacitance, and prevents damage caused by too high IGBT terminal voltage through redesign and optimization of IGBT unit adapter plate; through the optimization to the female row of the stromatolite, can reduce the influence of miscellaneous sense parameter to the IGBT, the on-the-spot practicality has been increased to the optimization of water-cooling base plate and insulating barrier simultaneously.

Drawings

Fig. 1 is the utility model provides a used power module's of GE fan structural schematic.

In the figure: 1. an IGBT body; 2. a water-cooled radiator; 3. an adapter plate; 4. an insulating baffle; 5. an alternating current bus bar; 6. and the direct current busbar.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments, but not all embodiments.

Referring to fig. 1, the power module for the GE fan comprises an IGBT body 1, an adapter plate 3 is installed at the top of the IGBT body, a water-cooled radiator 2 is installed at the bottom of the IGBT body 1, an alternating current busbar 5 and a direct current busbar 6 are respectively and fixedly installed on two sides of the IGBT body 1, and insulating baffles 4 are respectively and fixedly installed on two sides of the IGBT body 1.

In this embodiment, the ac busbar 5 and the dc busbar 6 are both integral laminated busbars.

In this embodiment, the insulating baffle 4 is fixedly connected to the IGBT body 1 by bolts.

In this embodiment, the insulating barrier 4 has a U-shaped structure.

In this embodiment, the water-cooled heat sink 2 includes a water-cooled substrate, and the water-cooled substrate is connected to the IGBT body 1.

In this embodiment, the GE unit IGBT unit is subjected to on-site investigation and data acquisition, and an actual circuit and a working condition are analyzed, and the GE unit IGBT unit is optimally designed mainly from the following three aspects:

(1) optimization of IGBT adapter plate

The circuit board is redesigned according to the existing problems and frequently occurring failure reasons of the adaptive board of the GE unit IGBT unit.

The specific optimization function is as follows:

optimizing an adapter board on the power module;

optimizing the processing flow and the three-proofing process;

optimizing the electrical characteristics;

and a snubber absorption capacitor is additionally arranged.

(2) Optimization of busbar system

The common busbar on the direct current side of the IGBT is improved into the laminated busbar, so that the impurity induction parameters are reduced, and the turn-off overvoltage is reduced.

(3) Optimization of water-cooled base plate and radiating baffle plate

The water-cooled base plate is manufactured again, the thermal performance of the manufactured water-cooled base plate is tested, and the manufactured water-cooled base plate has better thermal performance parameters compared with the original water-cooled base plate;

adopt novel material preparation insulating barrier to consolidate the thickening, increased the bearing capacity of baffle, reduce the on-the-spot spoilage.

In this embodiment, after the IGBT module is optimized, the IGBT module still satisfies the operating parameters of the power grid and the operating parameters of the unit, and the specific technical indexes of the IGBT module are as follows:

voltage on the ac side: 690VAC +/-10%;

direct-current side voltage: 1050 VDC;

the switching frequency reaches 5KHz of a machine side module of a network side module 3 KHz;

the cooling mode is liquid cooling;

the temperature rise of a cooling substrate in the IGBT module is less than or equal to 20K;

working temperature: -40 ℃ to +85 ℃;

relative humidity of operation: RH is less than or equal to 95 percent.

The power module reliability index is as follows:

pressure resistance value: 5000VDC/60S (Upper tube VS lower tube)

Non-uniform fluidity: less than or equal to 5 percent

Turn-on and turn-off spikes: less than or equal to 1500VDC

Double pulse test: meets the requirements of GB5226.1-2008 standard

Short circuit test: meets the requirements of GB5226.1-2008 standard

Novel IGBT module electromagnetic compatibility characteristic: meets the requirements of relevant standards of GB/T17626.2-2018 (electrostatic discharge immunity test), GB/T17626.3-2016 (radio frequency electromagnetic field radiation immunity test), GB/T17626.4-2018 (electric fast transient pulse group immunity test), GB/T17626.5-2019 (surge impact immunity test) and GB/T17626.6-2017 (conductive disturbance immunity induced by a radio frequency field)

The implementation steps of the GE power unit modification scheme are as follows:

(1) monitoring DC loop voltage

1. Stopping manually, and hanging a signboard;

2. disconnecting a three-phase 400V power supply of the grid-connected cabinet and verifying that no voltage exists;

3. disconnecting the auxiliary electric knife-fuse switch and the lightning protection module knife-fuse switch of the grid-connected cabinet;

4. and opening the cabinet door of the frequency converter control cabinet, measuring the voltage of the direct current bus by using a universal meter, and removing the front panel of the power module when the Ud is smaller than 48V. Note that the voltage appearing in the dc loop is still high, and even with 48V a short circuit occurs.

Warning: after the frequency converter is stopped, the direct current loop needs 15 to 30 minutes for voltage reduction;

(2) water cooling system deactivation

In order to prevent the leakage of the cooling liquid in the process of replacing the power module, the water cooling system of the pipe needs to be stopped after the unit is stopped, so that the water cooling system is ensured to be completely decompressed, and no pressure exists in the pipeline.

(3) Dismantling the front panel

And opening the door lock of the power cabinet.

Under the condition of confirming safety, the power cabinet door is opened

(4) Removing power modules

And closing a cooling pipeline connected with the power module.

And removing the cooling pipeline on the power module.

Connecting cable for detaching power module

And (5) removing the fixing screws of the power module.

Taking down the power module;

note that: when the power module is disassembled, protective measures are taken to prevent the cooling liquid in the power module from leaking into the cabinet.

(5) Installing new module

The power module is fixed by screws.

And connecting the power module copper bar with the copper bar in the cabinet.

The fixed screw is subjected to torque inspection to ensure that the screw is reliably fixed

(6) Connecting module cable

Connect the water-cooling pipeline to ensure the reliable connection of the pipeline

(7) Closing cabinet door

And after the module is installed, checking the module.

And after the inspection confirms that no problem exists, closing the cabinet door and locking the cabinet door.

(8) Power-on debugging

After the module is installed and checked, carrying out power-on debugging;

and after the power is on, the state of the converter system is checked, and after the converter system is determined to have no fault, a single-step operation test is carried out.

And after the single-step operation test is finished, performing a grid-connected test operation test.

And after the grid connection test is passed, the transformation is completed.

The above descriptions are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the utility model concepts of the present invention are equivalent to, replaced or changed.

Claims (5)

1. The utility model provides a used power module of GE fan, includes IGBT body (1), its characterized in that, adapter plate (3) are installed at the top of IGBT body, water-cooling radiator (2) are installed to the bottom of IGBT body (1), the both sides of IGBT body (1) are fixed mounting respectively and are exchanged female arranging (5) and the female (6) of arranging of direct current, the equal fixed mounting in both sides of IGBT body (1) has insulating baffle (4).

2. The power module for the GE fan according to claim 1, wherein the AC busbar (5) and the DC busbar (6) are both integral laminated busbars.

3. The power module for the GE fan according to claim 1, wherein the insulating baffle (4) is fixedly connected with the IGBT body (1) through bolts.

4. A power module for a GE fan according to claim 1, wherein the insulating barrier (4) is of U-shaped configuration.

5. The power module for the GE fan according to claim 1, wherein the water-cooled heat sink (2) comprises a water-cooled substrate, and the water-cooled substrate is connected with the IGBT body (1).

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