CN102403882B

CN102403882B - Fault traversing converter

Info

Publication number: CN102403882B
Application number: CN201110391480.5A
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: 2014-05-21
Anticipated expiration: 2031-12-01
Also published as: CN102403882A

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 traversing converter

Technical field

The present invention relates to a kind of current transformer, especially a kind of current transformer in the time of fault traversing.

Background technology

Current transformer is in the market without low-voltage crossing function, and existing current transformer volume is large, and empty large 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 prior art, and a kind of current transformer of low voltage ride-through function is provided.

The present invention addresses the above problem adopted technical scheme: a kind of fault traversing converter, is characterized in that comprising control cubicle, grid-connection cabinet, net side power cabinet, pusher side power cabinet and CHOPPER module; Between cabinet and cabinet, undertaken fastening by detachable device; Between cabinet and cabinet by and part cabinet (6) be connected; Described control cubicle inside is switch with knifeshaped fuse, motor starter, transformer, fans in series; Described blower fan is connected in series with heating and dehumidification; The circuit parallel connection that described heating and dehumidification is connected in series by miniature circuit breaker, contactor, UPS, modular power source and radiator fan with one, control cubicle (1) is mainly realized the function of the algorithm of current transformer and logic control, signal converting; Described grid-connection cabinet is connected in series by the soft loop, major loop thyristor module, backup protection circuit of opening; Described net side power cabinet is connected in series by inductance, D.C mutual-inductor and rectification module; Described pusher side power cabinet is to be connected in series by inversion module, D.C mutual-inductor and RLC filter circuit.

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

Accompanying drawing explanation

Fig. 1 is front view of the present invention;

Fig. 2 is rearview of the present invention;

Fig. 3 is main topological schematic diagram of the present invention;

Fig. 4 is the structural representation of thyristor module;

Fig. 5 is thyristor module internal structure schematic diagram;

Fig. 6 is the stereogram of chopper module;

Fig. 7 is the structure of copper bar schematic diagram of rectification, inversion module;

In figure, 1 is control cubicle, the 2nd, and grid-connection cabinet, the 3rd, net side power cabinet, the 4th, pusher side power cabinet, the 5th, CHOPPER module, the 6th, and cabinet part, 7, 7-1 is A the first copper bar mutually, A is the second copper bar mutually, and 8, 8-1 is B the first copper bar mutually, B is the second copper bar mutually, and 9, 9-1 is C the first copper bar mutually, C is the second copper bar mutually, and 10, 10-1 is U the first copper bar mutually, U is the second copper bar mutually, and 11, 11-1 is V the first copper bar mutually, V is the second copper bar mutually, and 12, 12-1 is W the first copper bar mutually, W is the second copper bar mutually, 13-1, 13-2, 13-3, 13-4, 13-5, 13-6 is folded shape copper bar one, folded shape copper bar two, folded shape copper bar three, folded shape copper bar four, folded shape copper bar five, folded shape copper bar six, 14, the 22nd, 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, AC copper-line, 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 by embodiment, the invention will be further described.

As Fig. 1, fault traversing converter comprises control cubicle 1, grid-connection cabinet 2, net side power cabinet 3, pusher side power cabinet 4 and chopper module 5; Fastening by detachment device between cabinet and cabinet, what in described figure, use is bolted; As Fig. 2, between cabinet and cabinet by and part cabinet 6 strengthen the steadiness between cabinet and cabinet.

As Fig. 3, control cubicle major function is: realize the function of the algorithm of current transformer and logic control, signal converting, complete with the signal of master controller mutual, Chopper function.Control cubicle inside is to be connected in series by switch with knifeshaped fuse, motor starter, transformer and blower fan, and blower fan is connected in series with heating and dehumidification, and the circuit parallel connection that heating and dehumidification is connected in series with circuit breaker, contactor, UPS, modular power source and radiator fan; Wherein modular power source and radiator fan are to provide power supply and heat radiation for rectification, inversion module in follow-up pusher side power model and net side power model.More than heating and dehumidification guarantees that current transformer is operated in zero centigrade, relative humidity is Celsius below 95; UPS provides operating voltage, and guarantees that veneer can carry out data storage under mistake, powering-off state.Control cubicle 1 is mainly realized the function of the algorithm of current transformer and logic control, signal converting.Described grid-connection cabinet 2 is connected in series by the soft loop, major loop thyristor module, backup protection circuit of opening; Fuse is mainly the device of backup protection circuit, and the soft circuit that opens is that the circuit parallel connection of being connected by contactor and circuit with another by contactor forms;

As Fig. 4 and Fig. 5 major loop thyristor module, comprise net side copper bar, pusher side copper bar, net side copper bar comprises A the first copper bar 7, A the second copper bar 7-1 mutually mutually, B is the first copper bar 8, B the second copper bar 8-1 mutually mutually, C is the first copper bar 9, C the second copper bar 9-1 mutually mutually, folded shape copper bar one 13-1, folded shape copper bar two 13-2, folded shape copper bar three 13-3; A mutually the first copper bar 7 is fastening with A phase the second copper bar 7-1 by folded shape copper bar one 13-1, wherein fastening by bolt 15 between copper bar; B mutually the first copper bar 8 is fastening with B phase the second copper bar 8-2 by folded shape copper bar two 13-2, wherein fastening by bolt 15 between copper bar; C mutually the first copper bar 9 is fastening with C phase the second copper bar 9-1 by folded shape copper bar three 13-3, wherein fastening by bolt 15 between copper bar; A phase the first copper bar 7 and B are fastening by insulator 16 between the first copper bar 8 mutually, to guarantee the insulating properties between them; B mutually the first copper bar 8 is fastening by insulator 16 with C phase the first copper bar 9, and A the first copper bar 7 mutually, and B is the first copper bar 8 mutually, and C is parallel to each other between the first copper bar 9 mutually; Described pusher side copper bar is identical with net side structure of copper bar, pusher side module comprises U the first copper bar 10 mutually, U is the second copper bar 10-1 mutually, V is the first copper bar 11 mutually, V is the second copper bar 11-2 mutually, and W is the first copper bar 12 mutually, and W is the second copper bar 12-1 mutually, U mutually the first copper bar 10 is connected with U phase the second copper bar 10-1 by folded shape copper bar four 13-4, fastening by bolt 15 between copper bar; V mutually the first copper bar 11 is connected with V phase the second copper bar 11-1 by folded shape copper bar five 13-5, fastening by bolt 15 between copper bar; W mutually the first copper bar 12 is connected with W phase the second copper bar 12-1 by folded shape copper bar six 13-6, fastening by bolt 15 between copper bar.Pusher side copper bar and net side copper bar are fastening by insulator 16 and air channel 17; 17 tops, air channel are provided with blower fan 20; 19 belows, air channel are provided with radiator 18, by the work of blower fan 20, make the heat of IGBT14 fast by air channel 17, then from radiator 19, shed.As Fig. 4, the quantity of described IGBT14 is 6, and every two is one group, and in group, IGBT14 carries out parallel connection; Each group IGBT14 is for connection network side copper bar and pusher side copper bar.Every phase copper bar is provided with user's terminal board 20.

As Fig. 6, chopper module comprises direct current copper bar, insulation board 21, IGBT22, AC copper-line 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; Between direct current copper bar, be folded with insulation board 21; Two copper bars are connected by securing member with electric capacity 24; The below of direct current copper bar is fastening with IGBT22 by IGBT keyset 25; IGBT22 is connected with AC copper-line 23 by securing member.When work, positive and negative direct current enters into IGBT by positive and negative direct current copper bar, then from AC copper-line out, in chopper module, can be IBGT when work temperature be provided by being provided with heating resistor; By being provided with air channel, radiator 30 and the fan 29 at 28 two ends, air channel can dispel the heat fast, extend the useful life of module.

As Fig. 7, the structure of rectification, inversion module is identical with chopper module, and unique difference is that its structure of copper bar is for " L " shape, and bending part is bending hole 33, and its effect is the 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 two kinds of normal mode, fault traversing patterns.

In normal mode operating state, bypass SCR switch conduction, asynchronous generator is directly connected to electrical network by bypass SCR switch.Now net side converter and pusher side current transformer are all in holding state, and system time monitors line voltage, once line voltage occurs extremely, system will be switched to fault traversing pattern immediately.

At fault traversing mode state, bypass SCR switch disconnects, and cuts off the connection of electrical network and blower fan system; Pusher side current transformer starts control generator input voltage simultaneously, makes generator continue stable operation; Bus CHOPPER absorbs the active power that generator sends, and maintains busbar voltage stable; Net side converter sends reactive current and supports electrical network.Meet the up-to-date grid-connected standard of national blower fan.

Claims

1. a fault traversing converter, comprises control cubicle (1), grid-connection cabinet (2), net side power cabinet (3), pusher side power cabinet (4) and CHOPPER module (5), between cabinet and cabinet, undertaken fastening by detachable device, between cabinet and cabinet by and part cabinet (6) be connected, described control cubicle inside is switch with knifeshaped fuse, motor starter, transformer, fans in series, described blower fan is connected in series with heating and dehumidification, the circuit parallel connection that described heating and dehumidification is connected in series by miniature circuit breaker, contactor, UPS, modular power source and radiator fan with one, control cubicle (1) is mainly realized the function of the algorithm of current transformer and logic control, signal converting, described grid-connection cabinet (2) is connected in series by the soft loop, major loop thyristor module, backup protection circuit of opening, described net side power cabinet (3) is connected in series by inductance, D.C mutual-inductor and rectification module, described pusher side power cabinet (4) is to be connected in series by inversion module, D.C mutual-inductor and RLC filter circuit, it is characterized in that described major loop thyristor module comprises net side copper bar, pusher side copper bar, IGBT(14), air channel (17), described net side copper bar comprises A the first copper bar (7), A the second copper bar (7-1) mutually mutually, B is the first copper bar (8), B the second copper bar (8-1) mutually mutually, C is the first copper bar (9), C the second copper bar (9-1) mutually mutually, folded shape copper bar one (13-1), folded shape copper bar two (13-2), folded shape copper bar three (13-3), folded shape copper bar four (13-4), folded shape copper bar five (13-5), folded shape copper bar six (13-6), described A mutually the first copper bar (7) is fastening with A phase the second copper bar (7-1) by folded shape copper bar one (13-1), described B mutually the first copper bar (8) is fastening with B phase the second copper bar (8-1) by folded shape copper bar two (13-2), described C mutually the first copper bar (9) is fastening with C phase the second copper bar (9-1) by folded shape copper bar three (13-3), A phase the first copper bar (7) and B are fastening by insulator (16) between the first copper bar (8) mutually, B mutually the first copper bar (8) is fastening by insulator (16) with C phase the first copper bar (9), and A is the first copper bar (7) mutually, B is the first copper bar (8) mutually, C is parallel to each other between the first copper bar (10) mutually, described pusher side copper bar is identical with net side structure of copper bar, comprise U the first copper bar (10) mutually, U is the second copper bar (10-1) mutually, V is the first copper bar (11) mutually, V is the second copper bar (11-1) mutually, W is the first copper bar (12) mutually, W is the second copper bar (12-1) mutually, U is the first copper bar (10) mutually, U connects by folded shape copper bar four (13-4) between the second copper bar (10-1) mutually, V is the first copper bar (11) mutually, V connects by folded shape copper bar five (13-5) between the second copper bar (11-1) mutually, W is the first copper bar (12) mutually, W connects by folded shape copper bar six (13-6) between the second copper bar (12-1) mutually, and pusher side copper bar passes through IGBT(14 with net side copper bar) be connected, described IGBT(14) quantity be 6, every two is one group, group in IGBT carry out parallel connection, each group IGBT is for connection network side copper bar and pusher side copper bar, C phase copper bar is provided with 2 insulators and is connected with air channel (17), on air channel (17), be connected with blower fan (18), under air channel (17), be connected with radiator (19), described every phase copper bar is provided with user's terminal board (20).

2. a kind of fault traversing converter according to claim 1, it is characterized in that chopper module comprises direct current copper bar, insulation board (21), IGBT(22), AC copper-line (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; Between direct current copper bar, be folded with insulation board (21); Two copper bars are connected by securing member with electric capacity (24); The below of direct current copper bar is by IGBT keyset (25) and IGBT(22) fastening; IBGT(22) be connected with AC copper-line (23) by securing member.

3. a kind of fault traversing converter according to claim 2, it is characterized in that described rectification, inversion module structure are identical with chopper modular structure, difference is that rectification, inversion module are " L " shape at direct current copper bar, and are provided with bending hole (26) at bending part.