CN202798431U

CN202798431U - Converter direct current side protection circuit component and converting cabinet

Info

Publication number: CN202798431U
Application number: CN201220445028.2U
Authority: CN
Inventors: 姬永军; 田兴; 王立; 余远建
Original assignee: Emerson Network Power Co Ltd
Current assignee: Weidi New Energy Co ltd
Priority date: 2012-09-03
Filing date: 2012-09-03
Publication date: 2013-03-13
Anticipated expiration: 2022-09-03

Abstract

The utility model relates to a converter direct current side protection circuit component and a converting cabinet. The converter direct current side protection circuit component comprises a first Insulated Gate Bipolar Transistor (IGBT), a second IGBT, an alternating current copper bar and a radiator, wherein the first IGBT, the second IGBT, the alternating current copper bar and the radiator are arranged on the same bottom plate, the radiator is vertical to the bottom plate, the first IGBT and the second IGBT are arranged back to back and are arranged on two sides of the radiator respectively, and the first IGBT and the second IGBT are connected in parallel through the alternating current copper bar. By the aid of the converter direct current side protection circuit component, the circuit balancing degree of IGBTs is guaranteed, upper tubes and lower tubes of IGBTs can be used, the capacitance absorbing installation quantity is not limited, the layout structure is compact, the space can be used completely and the maintenance is convenient.

Description

A kind of current transformer DC side protective circuit assembly and converter cabinet

Technical field

The utility model relates to the power technology field, more particularly, relates to a kind of current transformer DC side protective circuit assembly and converter cabinet.

Background technology

In wind power generation, fault traversing (Fault ride-through, FRT) refers to be incorporated into the power networks point voltage when falling at wind-driven generator, and blower fan still can keep being incorporated into the power networks, even provides certain reactive power to electrical network, supports electrical network, until power system restoration is normal.More commonly finishing FRT by access DC side protective circuit (or being called the Chopper circuit) and/or rotor-side protective circuit (or being called the Crowbar circuit) in current transformer at present passes through.The different scheme that can adopt dissimilar current transformers realizes that FRT passes through, for example in double-feed current transformer, generally adopt the combination of DC side protective circuit (or being called the Chopper circuit) and rotor-side protective circuit (or being called the Crowbar circuit) to realize that FRT passes through; In full power convertor, only need to adopt the Chopper circuit can realize that FRT passes through.The operation principle of Chopper circuit and Crowbar circuit all has introduction in many available data documents, be not repeated herein.

At present common Chopper circuit power device layout as shown in Figure 1, comprising two insulated gate bipolar transistors (Insolated Gate Bipolar Transistor, IGBT) 1, Absorption Capacitance 2, radiator 3, AC copper-line 4, positive and negative DC master row 5, resistance, Hall element 6 and Chopper drives plate (hereinafter to be referred as the CP drive plate) 7.As shown in Figure 1, AC copper-line 4 order is passed two IGBT, two IGBT are connected in series, and two IGBT levels is installed, layout side by side; The positive and negative DC master row 5 that connects two IGBT is not exclusively stacked; Radiator 3 is arranged at the bottom of IGBT; Absorption Capacitance 2 is positioned at the top of IGBT; CP drive plate 7 is positioned at the left side of IGBT.

Adopt the Chopper circuit power device layout shown in Fig. 1 to have following problem:

1, because AC copper-line 4 orders are passed two IGBT, can cause two not current-sharings of IGBT, thereby cause the larger IGBT life-span of electric current relatively to reduce;

2, because positive and negative DC master row 5 is fully not stacked, can cause the stray inductance between positive busbar and the negative busbar larger, the due to voltage spikes that produces when IGBT is turn-offed is higher, causes IGBT to damage easily;

3, Absorption Capacitance 2 is arranged at the top of IGBT after, because being subject to the impact of mounting screw position, two Absorption Capacitances 2 can only be installed, because the effect of Absorption Capacitance 2 is to absorb the due to voltage spikes that produces when IGBT turn-offs, its installable quantity is restricted the absorption that also can affect this due to voltage spikes;

4, be provided with top tube and down tube as switching tube on the IGBT, adopt above-mentioned layout after because the restriction of structure, the upper pipe of IGBT can't use, and can only use under it pipe as switching tube;

5, above-mentioned layout need take larger area, can not take full advantage of the space in the rack, also is inconvenient to safeguard.

The utility model content

The technical problems to be solved in the utility model is, for the defects of prior art, provides a kind of rationally distributed current transformer DC side protective circuit assembly.

Another purpose of the present utility model is, a kind of converter cabinet that adopts above-mentioned current transformer DC side protective circuit assembly is provided.

The technical scheme that its technical problem that solves the utility model adopts is:

Construct a kind of current transformer DC side protective circuit assembly; comprise an IGBT, the 2nd IGBT, AC copper-line and the radiator that are arranged on the same base plate; wherein; described radiator is perpendicular to described base plate setting; a described IGBT and described the 2nd IGBT arrange and lay respectively at the both sides of described radiator back-to-back, and a described IGBT and described the 2nd IGBT are connected in parallel by described AC copper-line.

Current transformer DC side protective circuit assembly described in the utility model, wherein, described AC copper-line comprises with respect to symmetrically arranged the first AC copper-line of described radiator and the second AC copper-line;

One end of described the first AC copper-line is drawn from a described IGBT, and the other end links to each other with described the second AC copper-line; One end of described the second AC copper-line is drawn from described the 2nd IGBT, and the other end links to each other with described the first AC copper-line.

Current transformer DC side protective circuit assembly described in the utility model wherein, also is provided with DC master row on the described base plate; Described DC master row comprises positive direct-current busbar and the negative DC master row that lamination arranges, and is provided with one deck dielectric film in the middle of described positive direct-current busbar and the described negative DC master row.

Current transformer DC side protective circuit assembly described in the utility model, wherein, described positive direct-current busbar and described negative DC master row be " U " shape for being made of intermediate plate and both sides panel all.

Current transformer DC side protective circuit assembly described in the utility model; wherein; intermediate plate on the described negative DC master row covers on a described IGBT, described the 2nd IGBT and described radiator and the upper surface that described backplate surface parallels; a wherein side panel of described negative DC master row covers the front of a described IGBT, and the opposite side panel covers the front of described the 2nd IGBT.

Current transformer DC side protective circuit assembly described in the utility model wherein, is respectively arranged with wiring position at least two symmetries, that be used for connecting a described IGBT, described the 2nd IGBT at the both sides of described negative DC master row panel.

Current transformer DC side protective circuit assembly described in the utility model, wherein, described the first AC copper-line is perpendicular in the projection in a described IGBT front at a wherein side panel of the projection in a described IGBT front and described negative DC master row;

Described the second AC copper-line is perpendicular in the projection in described the 2nd IGBT front at a wherein side panel of the projection in described the 2nd IGBT front and described negative DC master row.

Current transformer DC side protective circuit assembly described in the utility model, wherein, described current transformer DC side protective circuit assembly at least also comprises two with respect to the symmetrically arranged described Absorption Capacitance of described radiator.

The utility model also provides a kind of converter cabinet, comprises cabinet, wherein, is provided with in the described cabinet such as aforementioned each described current transformer DC side protective circuit assembly.

Converter cabinet described in the utility model wherein, is provided with the first card rail, the second card rail and the 3rd card rail that are parallel to each other from left to right in the described cabinet;

Described the first card rail matches with described the second card rail and holds fixing described resistance, and described the second card rail matches with described the 3rd card rail and holds the base plate that is fixedly installed an IGBT, the 2nd IGBT, AC copper-line and radiator.

The beneficial effects of the utility model are: by with radiator perpendicular to the base plate setting, and an IGBT and the 2nd IGBT are arranged at the radiator both sides back-to-back, and adopt AC copper-line to be connected in parallel, can not only guarantee the equal mobility of IGBT, the top tube and down tube of IGBT all can be used, and make the installation quantity of Absorption Capacitance unrestricted, and compact layout and structure, take full advantage of the space, be convenient to safeguard.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the Chopper circuit power device layout schematic diagram of prior art;

Fig. 2 is the current transformer DC side protective circuit schematic diagram of the utility model preferred embodiment;

Fig. 3 is the current transformer DC side protective circuit assembly layout schematic diagram of the utility model preferred embodiment;

Fig. 4 is the current transformer DC side protective circuit assembly layout explosive view of the utility model preferred embodiment;

Fig. 5 is the converter cabinet structural representation of the utility model preferred embodiment;

Fig. 6 is current transformer DC side protective circuit assembly scheme of installation in the converter cabinet of the utility model preferred embodiment.

Embodiment

The current transformer DC side protective circuit figure of the utility model preferred embodiment as shown in Figure 2; current transformer DC side protective circuit assembly 100 layouts as shown in Figure 3; consult simultaneously current transformer DC side protective circuit assembly 100 layout explosive views shown in Figure 4, this current transformer DC side protective circuit assembly 100 comprises that two IGBT 10(that are arranged on the same base plate 90 comprise an IGBT 11 and the 2nd IGBT 12), AC copper-line 40 and radiator 50.Wherein, radiator 50 arranges perpendicular to base plate 90, and an IGBT 11 and the 2nd IGBT 12 arrange and lay respectively at the both sides of radiator 50 back-to-back, and an IGBT 11 and the 2nd IGBT 12 are connected in parallel by AC copper-line 40.Particularly, radiator 50 is rectangular structure, above-mentioned radiator 50 is referred to perpendicular to base plate 90 setting: the side that the long limit of radiator 50 is corresponding and base plate 90 surfaces are affixed, and the back side of an IGBT 11 and the 2nd IGBT 12 is adjacent to respectively on the radiator 50 obverse and reverse vertical with base plate 90.

Because two IGBT 10 share a radiator 50, so that modular construction is compact, can take full advantage of the space.And an IGBT 11 and the 2nd IGBT 12 be arranged at respectively radiator 50 both sides, can so that the front of an IGBT 11 and the 2nd IGBT 12 can expose fully, be convenient to wiring, therefore can guarantee that the top tube and down tube on the IGBT 10 all can use, simultaneously also being convenient to not, space-constrained arranges a plurality of Absorption Capacitances 20, the due to voltage spikes that produces when turn-offing with abundant absorption IGBT reaches IGBT 10 device derate requirements.And an IGBT 11 and the 2nd IGBT 12 be connected in parallel by AC copper-line 40 can avoid the caused not current-sharing that is linked in sequence, guarantee the equal mobility of IGBT 10, prolong 10 useful lifes of IGBT.In a further embodiment, as shown in Figure 3 and Figure 4, the AC copper-line 40 that connects an IGBT 11 and the 2nd IGBT 12 comprises the first AC copper-line 41 and the second AC copper-line 42.Wherein, an end of the first AC copper-line 41 is drawn from an IGBT 11, and the other end links to each other with the second AC copper-line 42; One end of the second AC copper-line 42 is drawn from the 2nd IGBT 12, and the other end links to each other with the first AC copper-line 41.And the first AC copper-line 41 and the second AC copper-line 42 are symmetrical arranged with respect to radiator 50, to guarantee the equal mobility of IGBT 10, prolong 10 useful lifes of IGBT.

In a further embodiment, as shown in Figure 3 and Figure 4, also be provided with DC master row 30 on the base plate 90.DC master row 30 comprises positive direct-current busbar 31 and negative DC master row 32, and positive direct-current busbar 31 and negative DC master row 32 lamination settings, at positive direct-current busbar 31 and the negative DC master row 32 middle one deck dielectric films 33 that are provided with.Can reduce like this stray inductance between positive direct-current busbar 31 and the negative DC master row 32, avoid IGBT 10 to damage because voltage rises so high.

Preferably, as shown in Figure 3 and Figure 4, the positive direct-current busbar 31 in above-described embodiment and negative DC master row 32 be " U " shape for being made of intermediate plate 34 and both sides panel 35 all.Intermediate plate 34 on the negative DC master row 32 covers on an IGBT 11, the 2nd IGBT 12 and radiator 50 and the upper surface 91 that base plate 90 surfaces parallel, a wherein side panel 35 of negative DC master row 32 covers the front of an IGBT 11, and opposite side panel 35 covers the front of the 2nd IGBT 12.Positive direct-current busbar 31 be superimposed upon in the same way negative DC master row 32 above, and between negative DC master row 32 and positive direct-current busbar 31, dielectric film 33 is set and separates.

Further, as shown in Figure 3 and Figure 4, both sides panel 35 at negative DC master row 32 is respectively arranged with at least two wiring positions that are used for connecting an IGBT 11, the 2nd IGBT 12, is positioned at wiring position 351 on wiring position 351 and the opposite side panel 35 that is positioned at negative DC master row 32 on the wherein side panel 35 of negative DC master row 32 with respect to radiator 50 symmetries.Also be provided with in the same way the wiring position with respect to radiator 50 symmetries on the positive direct-current busbar 31.Can further guarantee like this equal mobility of IGBT 10, prolong 10 useful lifes of IGBT.After tested, adopt the present embodiment scheme after, the nonuniform fluid of IGBT 10 is less than 2%, even can reach 1%.

Particularly, as shown in Figure 3 and Figure 4, in above-described embodiment, the upper pipe of IGBT 10 and lower pipe are drawn positive electricity-linkingup point 112, negative electricity-linkingup point 111 and are exchanged electricity-linkingup point 113 after encapsulation in the front of IGBT 10.Wherein, the wiring position on the positive direct-current busbar 31 is connected with the positive electricity-linkingup point 112 of IGBT 10, and the wiring position 351 on the negative DC master row 31 is connected with the negative electricity-linkingup point 111 of IGBT 10, and AC copper-line 40 is connected with the electricity-linkingup point 113 that exchanges of IGBT 10.Above-mentioned positive direct-current busbar 31 can be changed as required with the position of negative DC master row 32, can will be positioned at the negative DC master row that is set on upper strata, and what will be positioned at lower floor is set to the positive direct-current busbar.

Preferably, the positive direct-current busbar 31 in above-described embodiment is vertical with the outlet direction of AC copper-line 40 with the outlet direction of negative DC master row 32.Particularly, as shown in Figure 4, the first AC copper-line 41 is at projection and negative DC master row 32(or the positive direct-current busbar 31 in an IGBT 11 fronts) a wherein side panel 35 perpendicular in the projection in an IGBT 11 fronts.Equally, the second AC copper-line 42 is at projection and negative DC master row 32(or the positive direct-current busbar 31 in the 2nd IGBT 12 fronts) a wherein side panel 35 perpendicular in the projection in the 2nd IGBT 12 fronts.Can save like this connection copper bar and take up space, reduced volume makes current transformer DC side protective circuit assembly 100 structures compacter.

Foregoing, as shown in Figure 3 and Figure 4, after the layout that has adopted above-described embodiment, can not be subjected to the restriction of space and screw position, a plurality of Absorption Capacitances 20 are set.Preferably, current transformer DC side protective circuit assembly at least also comprises two with respect to radiator 50 symmetrically arranged Absorption Capacitances 20, and two or more Absorption Capacitances 20 lay respectively at the face side of an IGBT 11 and the face side of the 2nd IGBT 12.For example, when being provided with four Absorption Capacitances 20, can place respectively two in the face side of an IGBT 11 and the face side of the 2nd IGBT 12.

It will be appreciated by persons skilled in the art that in concrete implementation process current transformer DC side protective circuit assembly 100 can also comprise Hall element 60, CP drive plate 70 and resistance 80 as shown in Figures 2 and 3.In another embodiment of the present utility model, a kind of converter cabinet also is provided, as shown in Figure 5, comprise cabinet 200, wherein, be provided with in the cabinet 200 such as the described current transformer DC side of aforementioned arbitrary embodiment protective circuit assembly 100.The concrete layout type of current transformer DC side protective circuit assembly 100 does not repeat them here with reference to aforementioned each embodiment.After adopting the current transformer DC side protective circuit assembly 100 in the various embodiments described above, can save cabinet 200 interior spaces, and more be convenient to the wherein maintenance of each device.

Current transformer DC side protective circuit assembly 100 in above-described embodiment can adopt various ways to be installed in the cabinet 200; wherein the preferred card rail that adopts is fixed respectively with the base plate 90 that is provided with an IGBT 11, the 2nd IGBT 12, AC copper-line 40, radiator 50 resistance 80 of current transformer DC side protective circuit assembly 100, so that the installation and maintenance of current transformer DC side protective circuit assembly 100.

Particularly, as shown in Figure 6, in cabinet 200, be provided with the first card rail 201, the second card rail 202 and the 3rd card rail 203, the first card rails 201, the second card rail 202 and the 3rd card rail 203 and be arranged in parallel from left to right.The first card rail 201 matches with the second card rail 202 and holds fixed resistance 80, the second card rails 202 and the 3rd and block rail 203 and match and hold fixed base plate 90.During installation, only need resistance 80 and base plate 90 are pushed in the cabinet 200 along the card rail respectively, get final product with securing member is fixing again.Resistance 80 after the installation is positioned at the left side of base plate 90 in cabinet 200, can shorten like this distance of resistance 80 and IGBT 10, reduces the energy loss in the current delivery process.

In sum, the utility model is by arranging radiator 50 perpendicular to base plate 90, and an IGBT 11 and the 2nd IGBT 12 are arranged at radiator 50 both sides back-to-back, and adopt AC copper-line 40 to be connected in parallel, and can not only guarantee the equal mobility of IGBT 10, the top tube and down tube of IGBT 10 all can be used, and make the installation quantity of Absorption Capacitance 20 unrestricted, and compact layout and structure, take full advantage of the space, be convenient to safeguard.

Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of the utility model claims.

Claims

1. current transformer DC side protective circuit assembly; comprise an IGBT(11 who is arranged on the same base plate (90)), the 2nd IGBT(12), AC copper-line (40) and radiator (50); it is characterized in that; described radiator (50) arranges perpendicular to described base plate (90); a described IGBT(11) and described the 2nd IGBT(12) arrange back-to-back and lay respectively at the both sides of described radiator (50) and a described IGBT(11) and described the 2nd IGBT(12) be connected in parallel by described AC copper-line (40).

2. current transformer DC side protective circuit assembly according to claim 1 is characterized in that, described AC copper-line (40) comprises with respect to symmetrically arranged the first AC copper-line of described radiator (50) (41) and the second AC copper-line (42);

One end of described the first AC copper-line (41) is from a described IGBT(11) to draw, the other end links to each other with described the second AC copper-line (42); One end of described the second AC copper-line (42) is from described the 2nd IGBT(12) to draw, the other end links to each other with described the first AC copper-line (41).

3. current transformer DC side protective circuit assembly according to claim 2 is characterized in that, also is provided with DC master row (30) on the described base plate (90); Described DC master row (30) comprises positive direct-current busbar (31) and the negative DC master row (32) that lamination arranges, described positive direct-current busbar (31) and the middle one deck dielectric film (33) that is provided with of described negative DC master row (32).

4. current transformer DC side protective circuit assembly according to claim 3 is characterized in that, described positive direct-current busbar (31) and described negative DC master row (32) be " U " shape for being made of intermediate plate (34) and both sides panel (35) all.

5. current transformer DC side protective circuit assembly according to claim 4; it is characterized in that; intermediate plate (34) on the described negative DC master row (32) covers a described IGBT(11), described the 2nd IGBT(12) and described radiator (50) and upper surface (91) that described base plate (90) surface parallels on; a wherein side panel (35) of described negative DC master row (32) covers a described IGBT(11) the front, opposite side panel (35) covers described the 2nd IGBT(12) the front.

6. current transformer DC side protective circuit assembly according to claim 5; it is characterized in that, the both sides panel (35) of described negative DC master row (32) be respectively arranged with at least two symmetries, be used for connecting a described IGBT(11), described the 2nd IGBT(12) wiring position (351).

7. current transformer DC side protective circuit assembly according to claim 6, it is characterized in that described the first AC copper-line (41) is at a described IGBT(11) positive projection and a wherein side panel (35) of described negative DC master row (32) be at a described IGBT(11) projection in front is perpendicular;

Described the second AC copper-line (42) at the wherein side panel (35) of the positive projection of described the 2nd IGBT (12) and described negative DC master row (32) at described the 2nd IGBT(12) projection in front is perpendicular.

8. current transformer DC side protective circuit assembly according to claim 1 is characterized in that, described current transformer DC side protective circuit assembly at least also comprises two with respect to the symmetrically arranged Absorption Capacitance of described radiator (50) (20).

9. a converter cabinet comprises cabinet (200), it is characterized in that, is provided with in the described cabinet (200) such as each described current transformer DC side protective circuit assembly (100) among the claim 1-8.

10. converter cabinet according to claim 9 is characterized in that, is provided with from left to right the first card rail (201), the second card rail (202) and the 3rd card rail (203) that are parallel to each other in the described cabinet (200);

Described the first card rail (201) matches with described the second card rail (202) and holds fixing described resistance (80), described the second card rail (202) and the described the 3rd block rail (203) match to hold be fixedly installed an IGBT(11), the 2nd IGBT(12), the base plate (90) of AC copper-line (40) and radiator (50).