CN202855488U - Dry type transformer device used for offshore wind power generation - Google Patents

Abstract

The utility model provides a dry type transformer device used for offshore wind power generation, wherein the dry type transformer device used for offshore wind power generation is installed inside an offshore wind turbine tower cylinder or an engine cabin, is wholly sealed, and achieves automatic circulation and automatic cooling. The dry type transformer device used for offshore wind power generation is mainly composed of a resin pouring dry type transformer, a wholly-sealed metal shell, an internal cooler, an external cooler, a cooling water pump and a controller. The wholly-sealed metal shell can effectively prevent corrosion caused by external moisture, saline matters and corrosive gas; the transformer does not directly contact the natural environment on the sea and is strong in corrosion resistance and long in service life; material of the transformer has the characteristics of burning difficulty and self-extinguishing and is not prone to outbreak of fire; and cooling wind channels are installed inside windings of a low-voltage coil and a high-voltage coil, a guide plate device is adopted, heat dissipation efficiency is greatly improved, overload capacity of the transformer is strong, and the dry type transformer device is particularly suitable for a place where wind power generation power fluctuates rapidly and greatly.

Description

A kind of Oversea wind power generation dry-type transformer device

Technical field

The utility model relates to a kind of device for transformer, relates in particular to a kind of be arranged in offshore wind generating tower cylinder or for the dry-type transformer device of totally-enclosed interior circulation .

Background technology

Transformer is that Wind Power Plant at Sea is matched in wind turbine generator for sending electric capital equipment, effect is that the 690v electric energy that the offshore wind farm unit is sent becomes 35kv by the transformer transformation, be transported to transformer station on the bank, then through transformer station is grid-connected to electrical network on the bank.Because factors such as being subject to ocean climate, environment affects, such as the specific position that transformer is laid, sea does not have earth's surface, and the position that is used for placing transformer can only be in tower cylinder or enging cabin; Transformer room need to keep the well-ventilated, the heat brought to dissipate himself loss, and sea does not possess the land weather conditions, it is that transformer can not tolerate that seawater, superpower humidity and salt corrode, due to the particularity of marine natural environment, the conventional type transformer at sea the useful life of wind energy turbine set can only be the time limit of 1/3-1/4 in land useful life.Therefore, exploitation adapts to the transformer safety system that Wind Power Plant at Sea is used, and ensures that the safe operation of offshore wind turbine is imperative.

Summary of the invention

The utility model provides a kind of hermetically sealed, the automatic cycle with characteristics such as anticorrosion, salt spray resistance, anti-mould, safe, long service life in offshore wind generating tower cylinder or enging cabin, cooling used for wind power generation dry-type transformer device automatically of being arranged on.

Addressing the above problem taked technical measures is:

A kind of Oversea wind power generation dry-type transformer device, it is characterized in that: dry-type transformer 1 is housed in closed shell 2, internal cooler 3 is equipped with at the window place of closed shell 2 inside upper part, the bottom of closed shell 2 inboards has airflow orifice 8, gas-flow deflector 7 is installed in periphery and the vacancy between closed shell 2 at the winding downside of dry-type transformer 1, upper end in closed shell 2 outsides is installed cooler 4, lower end in closed shell 2 outsides is installed cooling water pump 6, internal cooler 3, external cooler 4 and cooling water pump 6 connect into a complete Water-cooling circulating loop by cooling pipe, dry-type transformer 1, internal cooler 3, external cooler 4 is connected with control device 5 by control cables with cooling water pump 6, the circuit of control device 5 is comprised of heavy-current control part and light current control section, wherein: the annexation between strong electrical control circuit is: three-phase four-wire power L1, L2, L3 and N are connected respectively to three-phase air switch Q1, Q2, Q3 and single-phase air switch F10 by cable, connected respectively again the normally opened contact of direct-current switch power supply G10 and auxiliary relay K1, K2, K3 by cable, by the normally opened contact of auxiliary relay K1, K2, K3, connect internal cooler 3, external cooler 4 and cooling water pump 6, annexation between weak control circuit is: industrial single-chip microcomputer is comprised of two bar printing wiring boards, the temperature acquisition partly signal end of the temperature sensor PT100 of use is connected with industrial single-chip microcomputer, digital display part is comprised of three charactrons on wiring board, key input section is comprised of three fine motion push-key switchs on wiring board, the signal output part of industry single-chip microcomputer is connected with relay K 20, K21, K30, and the output of relay K 20, K21, K30 is connected with auxiliary relay K1, K2, K3.

The beneficial effects of the utility model: the utility model adopts the hermetically sealed housings close of metal, effectively prevents that outside moisture, salt and corrosive gas from corroding; Transformer in device does not directly contact with marine natural environment, and resistance to corrosion is strong, long service life; The material that transformer uses has difficult combustion from putting out characteristic, is difficult for breaking out of fire; Be designed with cooling air channel in low pressure winding, high pressure winding, and adopt guide board device, make the transformer overload ability strong, be particularly suitable for the quick fluctuation occasion of wind power generation power.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

The strong electrical control circuit schematic diagram that Fig. 2 is control device in the utility model;

The weak control circuit schematic diagram that Fig. 3 is control device in the utility model;

The control flow chart that Fig. 4 is control device in the utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is done to specific descriptions.

A kind of Oversea wind power generation dry-type transformer device, be arranged in offshore wind generating tower cylinder or enging cabin and use.Its concrete structure as shown in Figure 1, dry-type transformer 1 is housed in closed shell 2, internal cooler 3 is equipped with at the window place of closed shell 2 inside upper part, the bottom of closed shell 2 inboards has airflow orifice 8, gas-flow deflector 7 is installed in periphery and the vacancy between closed shell 2 at the winding downside of dry-type transformer 1, upper end in closed shell 2 outsides is installed cooler 4, lower end in closed shell 2 outsides is installed cooling water pump 6, internal cooler 3, external cooler 4 and cooling water pump 6 connect into a complete Water-cooling circulating loop by cooling pipe, dry-type transformer 1, internal cooler 3, external cooler 4 is connected with control device 5 by control cables with cooling water pump 6.

Wherein: dry-type transformer 1 is by iron core, folder, arm-tie, base, low-voltage coil, high-tension coil and low pressure, high-voltage connection terminal forms, iron core is made with silicon steel sheet or non-crystaline amorphous metal, by folder and arm-tie, clamp, folder and arm-tie surface spraying have moisture proof, anti-salt fog, three mould proof anti-paints, low-voltage coil and high-tension coil are by H(F) a level enamel-cover electromagnetic wire makes winding, the outsourcing fiberglass gridding cloth strengthens, under vacuum state, adopt mixture of epoxy resins to be poured into a mould, in glass fibre embedded rings epoxy resins, can absorb the energy that wire and heat expansion is produced due to load variations, prevent the coil cracking, closed shell is to bend and form by certain dimensional structure with sheet metal, case top lid can be dismantled, to facilitate transformer to hang in, also have window on housing, be used for installing internal cooler, gas-flow deflector also be installed in housing, can be effectively heat exchanger be blown into winding and unshakable in one's determination inner with the cold air of coming, be provided with cooling air channel in low-voltage coil and high-tension coil winding, radiating efficiency is improved greatly, adopt the type of cooling of the air-cooled common circulation of water-cooled simultaneously, at closed shell and tower cylinder outside thereof, install cooler additional, by the air-cooled of cooler inside and Water-cooling circulating mode, the transformer that is enclosed in enclosure interior is carried out to integral body cooling.

Control device 5 is monitor transformer coil and temperature unshakable in one's determination and according to temperature variations, inner and external cooler started and stop to control, and sending the device of overtemperature or fault-signal to master-control room, the circuit of control device 5 is divided into heavy-current control part and light current control section.The strong electrical control circuit schematic diagram that Fig. 2 is control device in the utility model, as shown in Figure 2, L1, L2, L3, N are three-phase four-wire power, external power supply for inside and outside cooler and cooling water pump, direct-current switch power supply, be connected respectively to three-phase air switch Q1, Q2, Q3 and single-phase air switch F10 by cable, they are overcurrent protections of inside and outside cooler and cooling water pump, direct-current switch power supply; Connect respectively for the direct-current switch power supply G10 of industrial single-chip microcomputer and Control and control auxiliary relay K1, the K2 of inside and outside cooler and cooling water pump, the normally opened contact of K3 by cable again, auxiliary relay K1, K2, K3 are the control elements that light current is controlled strong power part, by normally opened contact connection internal cooler 3, external cooler 4 and the cooling water pump 6 of auxiliary relay K1, K2, K3.The weak control circuit schematic diagram that Fig. 3 is control device in the utility model, as shown in Figure 3, industry single-chip microcomputer PIC16F873-series is produced by German Wolfgang Co., Ltd (Wolfgang JOPPICH), it is comprised of two bar printing wiring boards, temperature acquisition input conversion portion connects temperature sensor PT100 by binding post, import signal into wiring board, digital display part adopts conventional three figure place code route of pipe line plates, key input section adopts conventional three fine motion push-key switch wiring boards, show the set point of inputting each action with keyboard by number, temperature acquisition part Real-Time Monitoring actual temperature, the industry single-chip microcomputer calculates comparison set point and actual temperature value in real time, by in set program control, outer cooler and cooling water pump, connect output signal control relay K20 by binding post, K21, K30, control signal is by relay K 20, K21, K30, and then control auxiliary relay K1, K2, K3, in realizing controlling, the function of outer cooler and cooling water pump.

The control flow chart that Fig. 4 is control device in the utility model, its control principle is as follows: the temperature signal that is arranged on the platinum resistance thermometer PT100 in transformer coil and iron core is sent into industrial single-chip microcomputer through analog to digital conversion circuit, the industry single-chip microcomputer is calculated and is processed according to the various control parameters of measurement data and user's setting, according to the startup of setting with stop the transformer coil temperature value T1 of transformer internal cooler, T1 ', start and stop the transformer coil temperature value T2 of cooling water pump, T2 ', start and stop the chilled liquid temperature value T3 of external cooler, the temperature variations of T3 ', start respectively and stop internal cooler, cooling water pump and external cooler, if the transformer coil overtemperature can send overtemperature alarm or trip signal.

The running of this device is as follows: transformer is before power transmission, need inject cooling fluid to whole cooling system, when the pressure on water pump reaches desired vacuum degree, stop injecting anti-icing fluid, quiet put a period of time after, the air of coolant duct is discharged successively, at this moment the pressure of pipe interior likely descends, by water pump, water pipe is suppressed again, allowed pressure remain on definite value; During the charged operation of transformer, the loss meeting of transformer itself produces a large amount of heats, heat is up walked, by the internal cooler with cooling water pipe on closed shell, undertaken hot blast cooling, the type of cooling is the air-cooled water-cooled that adds, cooling liquid can raise owing to having absorbed the heat temperature, passes to external cooler by cooling water pipe and liquid is carried out cooling, and the heat that transformer produces so just is brought to tower cylinder outside by whole air-cooled water-cooling circulating system.The air of cooling mistake is blown into the bottom of transformer by the seal casinghousing airflow orifice, so just completed the process that a set of heat is exchanged between internal cooler and external cooler, thereby has guaranteed that transformer moves safely and effectively.

Claims (1)

1. an Oversea wind power generation dry-type transformer device, it is characterized in that: dry-type transformer (1) is housed in closed shell (2), internal cooler (3) is equipped with at the window place of closed shell (2) inside upper part, the inboard bottom of closed shell (2) has airflow orifice (8), gas-flow deflector (7) is installed in periphery and the vacancy between closed shell (2) at the winding downside of dry-type transformer (1), the upper end outside at closed shell (2) installed cooler (4), the lower end outside at closed shell (2) installed cooling water pump (6), internal cooler (3), external cooler (4) and cooling water pump (6) connect into a complete Water-cooling circulating loop by cooling pipe, dry-type transformer (1), internal cooler (3), external cooler (4) is connected with controller (5) by control cables with cooling water pump (6), the circuit of control device (5) is comprised of heavy-current control part and light current control section, wherein: the annexation between strong electrical control circuit is: three-phase four-wire power L1, L2, L3 and N are connected respectively to three-phase air switch Q1, Q2, Q3 and single-phase air switch F10 by cable, connected respectively again the normally opened contact of direct-current switch power supply G10 and auxiliary relay K1, K2, K3 by cable, by the normally opened contact of auxiliary relay K1, K2, K3, connect internal cooler (3), external cooler (4) and cooling water pump (6), annexation between weak control circuit is: industrial single-chip microcomputer is comprised of two bar printing wiring boards, the temperature acquisition partly signal end of the temperature sensor PT100 of use is connected with industrial single-chip microcomputer, digital display part is comprised of three charactrons on wiring board, key input section is comprised of three fine motion push-key switchs on wiring board, the signal output part of industry single-chip microcomputer is connected with relay K 20, K21, K30, and the output of relay K 20, K21, K30 is connected with auxiliary relay K1, K2, K3.

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