CN102403882A

CN102403882A - Fault traversing converter

Info

Publication number: CN102403882A
Application number: CN2011103914805A
Authority: CN
Inventors: 郭钦鑫
Original assignee: Zhejiang Haide New Energy Co Ltd
Current assignee: Chongqing Peite Electric Co ltd; Zhejiang Haide New Energy Co Ltd
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2012-04-04
Anticipated expiration: 2031-12-01
Also published as: CN102403882B

Abstract

The invention relates to a fault traversing converter, which comprises a control cabinet, a grid connected cabinet, a network side power cabinet, a machine side power cabinet and a CHOPPER module; the cabinet bodies are fastened through a splittable device and are connected through a combining cabinet; a knife fuse switch, a motor starter, a transformer and a fan are connected in series in the control cabinet; the fan is connected in series with a heating dehumidifying device; the heating dehumidifying device is connected in parallel with a circuit formed in a manner that a miniature circuit breaker, a contactor, a UPS (Uninterrupted Power Supply), module power supply and a heat radiation fan are connected in series; the control cabinet mainly realizes algorithm and logic control and signal switching functions of converter; the grid connected cabinet is formed in a manner that a soft start loop, a main loop thyristor module and a back-up protection circuit are connected in series; the network side power cabinet is formed in a manner that an inductor, an alternating current transformer and a rectification module are connected in series; and the machine side power module is formed in a manner that an inverter module, an alternating current transformer and an RLC (Radio Link Control) filter circuit are connected in series. The invention has the advantages that: the cabinet bodies can be assembled on the spot by the arrangement of a splittable structure; the transportation cost is reduced; the structure of the cabinet body is designed more reasonably due to a reasonable layout, and the space is made the best of; and due to more reasonable and personalized design of the main loop thyristor module, the rectifier and inverter module and the chopper module, the service life of the modules are prolonged while the working requirements are satisfied, and the modules are more stable and reliable.

Description

A kind of fault is passed through current transformer

Technical field

The present invention relates to a kind of current transformer, especially a kind of current transformer when fault is passed through.

Background technology

Current transformer does not in the market have low pressure and passes through function, and existing current transformer volume is big, and empty big utilance is not high, and power density is low; Packing and transportation are extremely not convenient.

Summary of the invention

Technical problem to be solved by this invention is to overcome existing above-mentioned shortcoming in the prior art, and provides a kind of low-voltage to pass through the current transformer of function.

The present invention addresses the above problem the technical scheme that is adopted:

A kind of fault is passed through current transformer, it is characterized in that comprising control cubicle, the cabinet that is incorporated into the power networks, net side power cabinet, pusher side power cabinet and CHOPPER module; Carry out fastening through detachable device between described cabinet and the cabinet; Between cabinet and the cabinet through and part cabinet (6) be connected; Described control cubicle inside is switch with knifeshaped fuse, motor starter, transformer, blower fan series connection; Said blower fan is connected in series with heating and dehumidification; The circuit parallel connection that said heating and dehumidification and one are connected in series by miniature circuit breaker, contactor, UPS, modular power source and radiator fan, control cubicle (1) mainly realize algorithm and the logic control of current transformer, the function of signal converting; The described cabinet that is incorporated into the power networks is by soft loop, major loop thyristor module, the backup protection circuit serial connection of opening; Described net side power cabinet is by inductance, D.C mutual-inductor and rectification module serial connection; Described pusher side power model is by inversion module, D.C mutual-inductor and RLC filter circuit serial connection.

Advantage of the present invention: cabinet can be assembled through detachable structure is set then and there; Reduce cost of transportation; Reasonably layout makes the structural design of its cabinet more reasonable, makes full use of the space; Major loop thyristor module, rectification and inversion module, chopper module more rationally, the design of hommization, make its module when satisfying job requirement, prolonged useful life, and stable more and reliable.

Description of drawings

Fig. 1 is a front view of the present invention;

Fig. 2 is a rearview of the present invention;

Fig. 3 is the topological sketch map of master of the present invention;

Fig. 4 is the structural representation of thyristor module;

Fig. 5 is a thyristor module internal structure sketch map;

Fig. 6 is the stereogram of chopper module;

Fig. 7 is the copper bar structural representation of rectification, inversion module;

1 is control cubicle, the 2nd among the figure, the cabinet that is incorporated into the power networks, the 3rd, and net side power cabinet, the 4th, the pusher side power cabinet, the 5th, CHOPPER module, the 6th, and cabinet spare, 7,7-1 be that A phase copper bar, 8,8-1 are that B phase copper bar, 9,9-1 are that C phase copper bar, 10,10-1 are that U phase copper bar, 11,11-1 are that V phase copper bar, 12,12-1 are that W phase copper bar, 13-1,13-2,13-3,13-4,13-5,13-6 are folded shape copper bars, 14, the 22nd, and IGBT, the 15th, bolt, the 16th, insulator, the 17th, air channel, the 18th, blower fan, the 19th, radiator, the 20th, user's terminal board, the 21st, insulation board, the 23rd exchanges copper bar, the 24th, electric capacity, the 25th, IGBT keyset, the 26th, anodal direct current copper bar, the 27th, negative pole direct current copper bar, the 28th, air channel, the 29th, fan, the 30th, radiator, the 31st, heating resistor, the 32nd, temperature sensor, the 33rd, bending hole.

Embodiment

Below in conjunction with accompanying drawing and through embodiment the present invention is described further.

Like Fig. 1, fault passes through that current transformer comprises control cubicle 1, the cabinet 2 that is incorporated into the power networks, net side power cabinet 3, pusher side power cabinet 4 and chopper module 5; Fastening through detachment device between described cabinet and the cabinet, what use among the said figure is bolted; Like Fig. 2, between cabinet and the cabinet through and part cabinet 6 strengthen the steadiness between cabinet and the cabinet.

Like Fig. 3, the control cubicle major function is: the function of the algorithm of realization current transformer and logic control, signal converting, completion is mutual with the signal of master controller, the Chopper function.Control cubicle inside is that blower fan is connected in series with heating and dehumidification by switch with knifeshaped fuse, motor starter, transformer and blower fan serial connection, and the circuit that heating and dehumidification is connected in series with satellite circuit breaker, contactor, UPS, modular power source and a radiator fan is parallelly connected; Wherein modular power source and radiator fan are for follow-up pusher side power model and rectification, the inversion module netted in the side power model power supply and heat radiation to be provided.More than the zero centigrade, relative humidity is Celsius below 95 to the work of heating and dehumidification assurance current transformer again; UPS is that unit provides operating voltage, and the assurance veneer can carry out storage under the mistake, powering-off state.The function of the algorithm of control cubicle 1 main realization current transformer and logic control, signal converting.The described cabinet 2 that is incorporated into the power networks is by soft loop, major loop thyristor module, the backup protection circuit serial connection of opening; Fuse is mainly the device of backup protection circuit, and the soft circuit that opens then is to be made up of with another circuit parallel connection of being connected by contactor and circuit contactor; Like Fig. 4 and Fig. 5 major loop thyristor module, comprise net side copper bar, the pusher side copper bar, net side copper bar comprises A phase copper bar 7, A phase copper bar 7-1, B phase copper bar 8, B phase copper bar 8-1, C phase copper bar 9, C phase copper bar 9-1, folded shape copper bar 13-1,13-2,13-3; Copper bar 7-1 is fastening mutually with A through folded shape copper bar 13-1 for A phase copper bar 7, and is wherein fastening through bolt 15 between the copper bar; Copper bar 8-2 is fastening mutually with B through folded shape copper bar 13-2 for B phase copper bar 8, and is wherein fastening through bolt 15 between the copper bar; Copper bar 10-3 is fastening mutually with C through folded shape copper bar 13-3 for C phase copper bar 10, and is wherein fastening through bolt 15 between the copper bar; A phase copper bar 7 is fastening through insulator 16 between the copper bar 8 mutually with B, to guarantee the insulating properties between them; Copper bar 9 is fastening through insulator 16 mutually with C for B phase copper bar 8, and A phase copper bar 7, and B phase copper bar 8 is parallel to each other between the C phase copper bar 9; Described pusher side copper bar is identical with net side copper bar structure, and the pusher side module comprises U phase copper bar 10, V phase copper bar 11, and W phase copper bar 12, U phase copper bar 10 is through folded shape copper bar 13-4 and U copper bar 10-1 connection mutually, and is fastening through bolt 15 between the copper bar; V phase copper bar 11 is through folded shape copper bar 13-5 and V copper bar 11-1 connection mutually, and is fastening through bolt 15 between the copper bar; W phase copper bar 12 is through folded shape copper bar 13-6 and V copper bar 12-1 connection mutually, and is fastening through bolt 15 between the copper bar.The pusher side copper bar is fastening through insulator 16 and air channel 17 with net side copper bar; 17 tops, air channel are provided with blower fan 20; 19 belows, air channel are provided with radiator 18, and through the work of blower fan 20, the heat that makes IGBT14 sheds from radiator 19 fast through air channel 17 then.Like Fig. 4, the quantity of described IGBT14 is 6, and per two is one group, and IGBT14 carries out parallel connection in the group; Each group IGBT14 is used for connecting net side copper bar and pusher side copper bar.Every phase copper bar is provided with user's terminal board 20.

Like Fig. 6, the chopper module comprises direct current copper bar, insulation board 21, IGBT22, interchange copper bar 23, electric capacity 24, IGBT keyset 25, and it is respectively anodal direct current copper bar 26 and negative pole direct current copper bar 27 that described direct current copper bar is two; Be folded with insulation board 21 between the direct current copper bar; Two copper bars and electric capacity 24 are connected through securing member; The below of direct current copper bar is fastening with IGBT22 through IGBT keyset 25; IBGT22 is connected with interchange copper bar 23 through securing member.During work, positive and negative direct current enters into IGBT through positive and negative direct current copper bar, from exchange copper bar, comes out then, through being provided with temperature is provided when heating resistor can be IBGT work on the chopper module; Through being provided with the air channel, the radiator 30 and the fan 29 at 28 two ends, air channel can dispel the heat fast, prolong the useful life of module.

Like Fig. 7, the structure of rectification, inversion module is identical with the chopper module, and unique difference is that its copper bar structure is " L " shape, and bending part is bending hole 33, and its effect is devices such as unloading stress, protection IGBT; As shown in Figure 3, current transformer is made up of bypass SCR switch, net side converter, pusher side current transformer, CHOPPER unit and auxiliary power supply five major parts.Its mode of operation can be divided into normal mode, fault is passed through two kinds of patterns.

In the normal mode operating state, bypass SCR switch conduction, asynchronous generator directly are connected to electrical network through bypass SCR switch.This moment nets side converter and the pusher side current transformer all is in holding state, and system time is kept watch on line voltage, in case line voltage takes place unusually, system will switch to fault immediately and pass through pattern.

Pass through mode state in fault, bypass SCR switch breaks off, and cuts off being connected of electrical network and blower fan system; Pusher side current transformer start-up control generator input voltage makes generator continue stable operation simultaneously; Bus CHOPPER absorbs the active power that generator sends, and it is stable to keep busbar voltage; The net side converter sends reactive current and supports electrical network.Satisfy the up-to-date national blower fan standard that is incorporated into the power networks.

Claims

1. a fault is passed through current transformer, it is characterized in that comprising control cubicle (1), the cabinet that is incorporated into the power networks (2), net side power cabinet (3), pusher side power cabinet (4) and CHOPPER module (5); Carry out fastening through detachable device between described cabinet and the cabinet; Between cabinet and the cabinet through and part cabinet (6) be connected; Described control cubicle inside is switch with knifeshaped fuse, motor starter, transformer, blower fan series connection; Said blower fan is connected in series with heating and dehumidification; The circuit parallel connection that said heating and dehumidification and one are connected in series by miniature circuit breaker, contactor, UPS, modular power source and radiator fan, control cubicle (1) mainly realize algorithm and the logic control of current transformer, the function of signal converting; The described cabinet that is incorporated into the power networks (2) is by soft loop, major loop thyristor module, the backup protection circuit serial connection of opening; Described net side power cabinet (3) is by inductance, D.C mutual-inductor and rectification module serial connection; Described pusher side power model (4) is by inversion module, D.C mutual-inductor and RLC filter circuit serial connection.

2. a kind of fault according to claim 1 is passed through current transformer, it is characterized in that described major loop thyristor module comprises net side copper bar, pusher side copper bar, IGBT (10), air channel (13); Described net side copper bar comprises A phase copper bar (7), A phase copper bar (7-1); B phase copper bar (8), B phase copper bar (8-1); C phase copper bar (9), C phase copper bar (9-1), folded shape copper bar (13-1), (13-2), (13-3), (13-4), (13-5), (13-6); Copper bar (7-1) is fastening mutually with A through folded shape copper bar (13-1) for described A phase copper bar (7); Copper bar (8-1) is fastening mutually with B through folded shape copper bar (13-2) for described B phase copper bar (8); Copper bar (9-1) is fastening mutually with C through folded shape copper bar (13-3) for described C phase copper bar (9); A phase copper bar (7) is fastening through insulator (16) between the copper bar (8) mutually with B, and copper bar (9) is fastening through insulator (16) mutually with C for B phase copper bar (8), and A phase copper bar (7); B phase copper bar (8) is parallel to each other between the C phase copper bar (10); Described pusher side copper bar is identical with net side copper bar structure; Comprise V phase copper bar (10), (10-1); V phase copper bar (11), (11-1), W phase copper bar (12), (12-1) connect through folded shape copper bar (13-4) between U phase copper bar (10), (10-1), connect through folded shape copper bar (13-5) between V phase copper bar (11), (11-1); Connect through folded shape copper bar (13-6) between W phase copper bar (12), (12-1); And the pusher side copper bar links to each other through IGBT (14) with net side copper bar; The quantity of described IGBT (14) is 6, and per two is one group, and IGBT carries out parallel connection in the group; Each group IGBT is used for connecting net side copper bar and pusher side copper bar; C phase copper bar is provided with 2 insulators and links to each other with air channel (17); Be connected with blower fan (18) on the air channel (17), be connected with radiator (19) under air channel (17); Described every phase copper bar is provided with user's terminal board (20).

3. a kind of fault according to claim 2 is passed through current transformer; It is characterized in that the chopper module comprises direct current copper bar, insulation board (21), IGBT (22), exchanges copper bar (23), electric capacity (24), IGBT keyset (25), it is respectively anodal direct current copper bar (26) and negative pole direct current copper bar (27) that described direct current copper bar is two; Be folded with insulation board (21) between the direct current copper bar; Two copper bars are connected through securing member with electric capacity (24); The below of direct current copper bar is fastening with IGBT (25) through IGBT keyset (25); IBGT (25) is connected with interchange copper bar (23) through securing member.

4. a kind of fault according to claim 1 is passed through current transformer, it is characterized in that being serially connected with after the described net side power cabinet module being connected to an absorption resistance, its role is to low pressure unnecessary energy in the absorption circuit when passing through.

5. a kind of fault according to claim 4 is passed through current transformer; It is characterized in that described rectification, inversion module structure are identical with the chopper modular structure; Difference is that rectification, inversion module are " L " shape at the direct current copper bar, and is provided with bending hole (26) at bending part.