CN208333037U - Generator DC excitation bus drives damp drying system - Google Patents

Abstract

The utility model relates to the technical fields of generating equipment; disclose a kind of damp drying system of generator DC excitation bus drive; by being equipped with air-heater interface in excitation bus group; when the excitation bus group moisture absorption or shut down cause insulation performance to reduce the case where when; hot-air seasoning can be carried out to excitation bus group by the air-heater interface external air-heater in excitation bus group, to achieve the purpose that quickly to improve bus insulation；Simultaneously; heating device is equipped on each insulated support of excitation bus group; insulated support is heated using chance is shut down; to improve the local temperature of insulated support, and then achieve the purpose that quickly to improve bus insulation, without manually guarding operation; compared to traditional hand sweeping or baking in a manner of reaching and improve bus insulation; it highly shortened the unit starting grid-connected time, improve the efficiency of generating set, reduce production cost.

Description

Generator DC excitation bus drives damp drying system

Technical field

The utility model relates to the technical fields of generating equipment, drive tide more particularly to a kind of generator DC excitation bus Drying system.

Background technique

Generator excited system is supplied with the power supply of synchronous generator exciting electric current and its general designation of auxiliary device.

Currently, DC excitation bus insulation part is mainly made of electric bakelite, epoxy resin board etc., it is easy the moisture absorption, especially After shutdown, excitation bus insulation is only 10k Ω when serious, no far below DL/T1164-2012 " steam turbine generator operation guidance " Less than the requirement of 500k Ω, it is required to put into a large amount of manpower and time before opening machine every time, opens bus-bar chamber to each interconnecting piece Position is cleaned, and is added interim iodine-tungsten lamp (more than 20) to toast whole section of DC bus, be can be only achieved the insulation of unit starting It is required that having seriously affected the unit starting grid-connected time, or even in unit running process, have occurred primary because of " going back to Nan Tian " high humidity The case where under weather, DC excitation bus insulation declines rapidly, triggering rotor one point to ground fault alarm, and because of heating device power Greatly, expensive price, and there are many insecurity factors, and special messenger to be needed to guard always, and cost is larger.

Utility model content

The purpose of the utility model is to provide a kind of generator DC excitation buses to drive damp drying system, can effectively administer hair Motor DC excitation bus insulation declines problem, and largely improves the insulation values of excitation bus, avoids artificial clear It sweeps or dries, improve the efficiency of generating set, reduce costs.

To solve the above-mentioned problems, the utility model provides a kind of damp drying system of generator DC excitation bus drive, packet Small of excitation, multiple excitation bus groups and exciter are included, multiple excitation bus groups are arranged in small of the excitation and institute It states between exciter, the excitation bus group is equipped with air-heater interface；The excitation bus group include cabinet, excitation bus with And multiple insulated supports of fixed excitation bus are used to support, heating device is equipped on multiple insulated supports.

It further, further include dehumidifier, the dehumidifier is arranged in the excitation is small.

Further, the excitation it is small in be additionally provided with heat lamp and temporary source.

Further, the excitation it is small in be fixedly provided with air-heater.

Further, the heating device is the aluminum alloy heating plate of 220V/100W.

Further, the side wall of the cabinet is arranged in the air-heater interface.

Further, bus through walls, the mother through walls are equipped between small of the excitation and the first excitation bus group Line is the DC excitation bus of insulation pouring.

Further, the insulated support is insulation support plate made of DMC material.

The utility model provides a kind of damp drying system of generator DC excitation bus drive, by setting in excitation bus group Have air-heater interface, when the excitation bus group moisture absorption or shut down cause insulation performance to reduce the case where when, excitation bus can be passed through The external air-heater of air-heater interface in group carries out hot-air seasoning to excitation bus group, to reach the mesh for quickly improving bus insulation 's；Meanwhile it being equipped with heating device on each insulated support of excitation bus group, using shutdown chance to insulated support Heated, to improve the local temperature of insulated support, and then achieve the purpose that quickly to improve bus insulation, is not necessarily to people Work guards operation, compared to traditional hand sweeping or baking in a manner of reaching and improve bus insulation, highly shortened machine Group starts the grid-connected time, improves the efficiency of generating set, reduces production cost.

Detailed description of the invention

Fig. 1 is the structural schematic diagram that the generator DC excitation bus in the utility model embodiment drives damp drying system.

In figure, 1, excitation small；2, excitation bus group；3, exciter；4, bus through walls；11, dehumidifier；12, heat lamp； 13, air-heater；21, cabinet；22, excitation bus；23, insulated support；24, air-heater interface；25, heating device；26, hot wind Source.

Specific embodiment

With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.

In the description of the present invention, it should be understood that term " on ", "lower", "left", "right", "top", "bottom" etc. The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure It makes and operates, therefore should not be understood as limiting the present invention.

As shown in connection with fig. 1, schematically show that a kind of generator DC excitation bus of the utility model embodiment drives Damp drying system, including excitation small 1, multiple excitation bus groups 2 and exciter 3, excitation small 1 is exactly pendulum inside power station The cubicle of energizing apparatus is put, exciter 3 is exactly a dc generator, generally and generator coaxle, when the big axis rotation of rotor, Exciter 3 is driven to rotate together, generating DC excitation electric current required for magnetic field to generator is supplied by exciter 3.It is more A excitation bus group 2 is arranged at excitation small 1 between exciter 3, and excitation bus group 2 is equipped with air-heater interface 24, hot wind Machine interface 24 can be used for external hot air source 26, drive tide to realize to dry magnetic force bus group；Excitation bus group 2 include cabinet 21, Excitation bus 22 and the multiple insulated supports 23 for being used to support fixed excitation bus 22, multiple insulated supports 23 are spaced Even setting, is used to support fixed excitation bus 22, and cabinet 21 is played to positioned at excitation bus 22 therein and insulated support 23 Protective shielding effect reduces extraneous moisture, dust and foreign object and causes phase fault, is equipped with and adds on multiple insulated supports 23 Thermal 25, heating device 25 are preferably the aluminum alloy heating plate of 220V/100W, and generally, air-heater interface 24 is arranged in case The side wall of body 21, the preferably side wall at 21 both ends of cabinet can be passed through hot wind into cabinet 21 by air-heater interface 24, heat Wind enters from 21 both ends of cabinet and spreads in cabinet 21, and excitation bus 22 and insulated support 23 can be effectively ensured by hot wind Drying.

The present embodiment by being equipped with air-heater interface 24 on 22 group 2 of excitation bus, when 22 group of 2 moisture absorption of excitation bus or When the case where shutdown causes insulation performance to reduce, the external hot air source 26 of air-heater interface 24 on 22 group 2 of excitation bus can be passed through To 22 group of 2 progress hot-air seasoning of excitation bus, to achieve the purpose that quickly to improve bus insulation；Meanwhile at 22 group 2 of excitation bus Each insulated support 23 on be equipped with heating device 25, using shut down chance insulated support 23 is heated, To improve the local temperature of insulated support 23, and then achieve the purpose that quickly to improve bus insulation, be operated without artificial guard, Compared to traditional hand sweeping or baking in a manner of reaching and improve bus insulation, highly shortened unit starting it is grid-connected when Between, the efficiency of generating set is improved, production cost is reduced.

Insulated support 23 is insulation support plate made of DMC material, because its migration of hydrophobicity is strong, the resistance to electric trace performance of self-cleaning Good, insulation degree height, physicochemical property is stable and increases retting-flax wastewater 20%-40%.BMC (DMC) material is Bulk (Dough) The abbreviation of molding compounds translates into Chinese and is all referred to as tubular molding compound, the master of BMC and DMC actually the two Want component to be consistent, only industry is different, from different places and call is different, Britain is the country for using DMC abbreviation earliest, European DMC is popular, and opposite BMC is referred to as popular in the U.S., is had according to the definition tubular molding compound of U.S. SPI excellent Electric property, mechanical performance, heat resistance, chemical corrosion resistance, and adapt to various moulding process can meet various products pair The requirement of performance.

It further includes dehumidifier 11 that generator DC excitation bus 22 in the present embodiment, which drives damp drying system, and dehumidifier 11 is set It sets in excitation small 1, mainly dehumidifier 11 to be put into operation, is changed under the extreme weather conditions such as at " going back to Nan Tian " Temperature and humidity environment in kind excitation small 1.Further, it is additionally provided with heat lamp 12 and temporary source in excitation small 1, interim electricity Source can at any time be powered the small-sized electricity consumption drying equipment in excitation small 1, further, in order to guarantee excitation small 1 In suitable temperature and humidity environment, air-heater 13 can also be installed in excitation small 1, this air-heater 13 is used for encouraging Small 1 progress hot-air seasoning of magnetic can come into operation at any time under extreme climate environment.

22 group 2 of multiple excitation buses is arranged at excitation small 1 between exciter 3, and 22 group 2 of multiple excitation buses is arranged on demand Cloth can linearly connect, and can also connect in broken line, bus through walls is equipped between excitation small 1 and 22 group 2 of first excitation bus 4, bus 4 through walls is mainly that bus 4 through walls is the DC excitation bus 22 of insulation pouring, and carries out anti-water seal to bus 4 through walls Measure is closed, thoroughly completely cuts off air circulation in excitation cell sections through walls and outdoor, prevents condensation.

To further increase insulation values, VPI dipping lacquer again after being toasted to the epoxy resin board edge cut surface of carbon brush holder, The Water-proof and oil-proof ability for improving epoxy resin board, to improve insulation, in addition, because at collector ring of generator cell bearing shell it is frequent Permeability, Seal Oil are easy the epoxy plate of pollution brush holder, in one circle oil-containing groove of bearing shell pedestal welding, place leakage disk, to greasy dirt and Shi Qingli can also improve insulation values to a certain extent.

It should be understood that various information are described in the utility model using term " first ", " second " etc., but these Information should not necessarily be limited by these terms, these terms are only used to for same type of information being distinguished from each other out.For example, not departing from this In the case where utility model range, " first " information can also be referred to as " second " information, and similar, " second " information can also be with Referred to as " first " information.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change It also should be regarded as the protection scope of the utility model into replacement.

Claims (8)

1. a kind of generator DC excitation bus drives damp drying system, which is characterized in that including small of excitation, multiple excitation buses Group and exciter, multiple excitation bus groups are arranged at the excitation small between the exciter, and the excitation is female Line group is equipped with air-heater interface；The excitation bus group includes cabinet, excitation bus and is used to support the fixed excitation Multiple insulated supports of bus are equipped with heating device on multiple insulated supports.

2. generator DC excitation bus as described in claim 1 drives damp drying system, which is characterized in that further include dehumidifying Machine, the dehumidifier are arranged in the excitation is small.

3. generator DC excitation bus as claimed in claim 2 drives damp drying system, which is characterized in that small of the excitation Inside it is additionally provided with heat lamp and temporary source.

4. generator DC excitation bus as claimed in claim 3 drives damp drying system, which is characterized in that small of the excitation Inside it is fixedly provided with air-heater.

5. as the described in any item generator DC excitation buses of Claims 1-4 drive damp drying system, which is characterized in that institute State the aluminum alloy heating plate that heating device is 220V/100W.

6. generator DC excitation bus as claimed in claim 5 drives damp drying system, which is characterized in that the air-heater connects The side wall of the cabinet is arranged in mouth.

7. generator DC excitation bus as claimed in claim 5 drives damp drying system, which is characterized in that small of the excitation Bus through walls is equipped between the first excitation bus group, the bus through walls is the DC excitation bus of insulation pouring.

8. generator DC excitation bus as claimed in claim 5 drives damp drying system, which is characterized in that the insulating supporting Part is insulation support plate made of DMC material.