CN2517084Y

CN2517084Y - Gas insulation dry-type air reactor

Info

Publication number: CN2517084Y
Application number: CN 02205151
Authority: CN
Inventors: 刘有斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-21
Filing date: 2002-02-21
Publication date: 2002-10-16
Anticipated expiration: 2012-02-21

Abstract

Reactors in electrical networks are mainly used in reactive compensation, and dry reactors are widely used because the dry reactors do not have oil and are free from leakage. The utility model adopts a gas-insulated dry hollow reactor which comprises a reactor winding assembled in a box body, a radiator arranged outside the box body and a heat exchanger between the box body and the reactor winding, wherein one side of the heat exchanger is tightly connected with the box body and the radiator, and the other side of the heat exchanger is tightly connected with the reactor winding. The utility model solves the heat radiation problem of the reactor reliably, so the reactor can have smaller volume and lower cost. The utility model is an ideal replacing product for the present hollow reactors.

Description

Gas insulating dry reactor without core

Affiliated technical field

The utility model is a kind of novel electric equipment that is used for reactive power compensation in the electrical network.

Background technology

The application of electric power system hollow core reactor is very widely, and its main purposes is as the series reactor in the reactive power compensation, is used for current limliting and filtering.In the prior art, reactor is divided into oil immersion and dry type two big classes, and liquid immersed reactor brings a lot of problems because there is transformer oil will have problems such as leakage, deterioration of oil to operation and maintenance, has not become application trend of electric power system so there is oiling.Dry reactor is divided into cored reactor and two kinds of no iron core reactors again, and air-core reactor obtains reasonable application because the high current limiting characteristic of the linearity are good.Existing dry-type air-core reactor is to adopt the epoxy casting mode basically, or other insulating material are fixed-type, because heat dissipation problem (does not have oil to dispel the heat as medium, the heat dispersion of air is relatively poor) volume of comparing winding with liquid immersed reactor wants big, cost is just much higher, and the heat radiation when big capacity is one and is difficult to the problem that solves, limited it to jumbo development, heat dissipation problem is the problem that will face during reactor manufactures and designs always in fact, also is the problem that never obtains fine solution.

The winding of air-core reactor is to produce heat, and heat looses and do not go out, and will produce the temperature rise that oversteps the extreme limit, and reactor is burnt.In traditional air-core reactor design, be to have designed air channel or oil duct in the winding, the air channel is a ventilation usefulness in the dry-type air-core reactor, oil duct is the oil circuit that increases in the oil immersion air-core reactor, promptly all be to adopt the mode of convection current that the heat transferred in the air-core reactor is gone out, dry-type air-core reactor adopts cross-ventilated mode, because of the heat transfer property difference of air a little, so need more bigger air channels, and the current density of winding is also selected lowlyer, these have all increased cost, than the air-core reactor cost height with the oil immersion of capacity; The oil immersion air-core reactor adopts transformer oil to come convection current, the heat in the winding is taken on the casing, and by the heat sink radiates on the casing in air because the heat transfer efficiency of transformer oil is high, the cost of its winding also hangs down relatively.In a word, it all is the mode that adopts traditional convection current that the heat of existing air-core reactor winding is derived, and convection current is the mode that a kind of heat conductivility will differ from relatively, can adopt a kind of better heat-conducting mode, can have greatly improved on performance and cost.

Because the leakage field of air-core reactor is bigger, airtight casing is again a magnetic conductor, will cause bigger dispersion loss, heating also can be compared serious, for reducing dispersion loss, has installed the magnetic conduction bar additional around casing, the magnetic circuit of leakage flux is provided, dispersion loss is dropped to minimum.

Summary of the invention

The purpose of this utility model provides a kind of novel gas insulating dry reactor without core, when making air-core reactor reach fire-proof and explosion-proof, adopts this better heat-conducting mode of heat pipe again, makes the decline that raises the cost of the performance of air-core reactor.

The said gas insulating dry reactor without core of the utility model, the winding that comprises the air-core reactor in the casing, gassy in the casing, casing is equipped with radiator outward, between casing and the air-core reactor winding heat exchanger is arranged, heat exchanger closely is connected with casing and radiator on one side, and another side closely is connected with the air-core reactor winding.

Casing is the structure of closed, insulation gas filled in the casing, comprise sulphur hexafluoride, nitrogen, dry air etc., slight pressure in the casing is higher than outside the casing, thereby guarantee reasonable insulation property, because casing is airtight, can all uses indoor and outdoor, and can avoid common dry-type air-core reactor because of the aging Insulation Problems of breaking and causing of epoxy.

Heat exchanger between casing and the air-core reactor winding is a heat pipe, heat pipe is known one of the most effective heat transfer element, it can transmit a large amount of heats at a distance by its very little sectional area and need not additionaling power, and its thermal conductivity is considerably beyond any known metal.Heat pipe is airtight structure, the certain vacuum degree of inner maintenance, and be filled with certain liquid, and an end heated liquid can be vaporized in the pipe, becomes liquid again to other end cooling back gas, moves in circles, and the heat pipe two ends are almost not have the temperature difference.The Heat Transfer of Heat Pipe on Heat Pipe ability is surprising, its limit of the heat pipe of 4 millimeters internal diameters is transmitted energy can be above 5 kilowatts, heat on the winding can be delivered on casing and the radiator very soon, just no longer need the air channel, the current density of winding also can be selected bigger, the volume of winding can reduce a lot, thereby can reduce cost greatly.Temperature on temperature on the winding and the casing radiator is roughly the same, this also can reduce the temperature rise of air-core reactor greatly, overcome the higher and a series of problems brought of air-core reactor temperature rise, the class of insulation of the required insulating material of air-core reactor also can reduce, and also can reduce the loss of air-core reactor when this reduces cost.

Its evaporation section of common heat pipe and condensation segment are that no compartment of terrain links together substantially, be independent structures one by one, be used in the gas insulating dry reactor without core, bring certain difficulty can for the coiling of winding, adopt evaporation section and the separated separate heat pipe of condensation segment, just can address this problem better.

The general selected material of thermotube wall is a metal material, good heat conductivity, but be used in the air-core reactor, because the insulation property of metal material are poor, though solved the heat conduction problem, but brought Insulation Problems, so the tube wall of separate heat pipe evaporation section is preferably the insulating material of heat conduction, not only heat conduction but also insulate, the thermal conductivity of this material is greater than 1W/mK.

The utility model is compared with existing technology, because heat transfer efficiency improves, can reduce the volume and the cost of air-core reactor significantly, and the temperature rise that has reduced air-core reactor has reduced the loss of air-core reactor simultaneously; Adopt the closed gas-insulated structure, can improve insulation property and reliability.

The utility model is a no oiling structure, with low cost and have distinguishing features such as reducing temperature rise and loss.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Accompanying drawing 1 is a side-looking structural representation of the present utility model

Accompanying drawing 2 is a plan structure schematic diagram of the present utility model

Embodiment

In Fig. 1,2, the 1st, to the evaporation section of the separate type heat pipe exchanger of winding heat radiation, the 2nd, the winding of air-core reactor, the 3,4,5, the 6th, the pipe of connection evaporation section and condensation segment, the 3rd, the pipe that steam passes through from the evaporation section to the condensation segment, the 6th, the pipe that condensed fluid returns, 4, the 5th, the pipe of the corresponding evaporation section of winding of connection three-phase air-core reactor, the 7th, magnetic conduction bar, the 8th, the condensation segment of separate type heat pipe exchanger, the 9th, casing, the 10th, to the radiator of air heat radiation.Evaporation section 1 outer wall of separate type heat pipe exchanger closely contacts with the winding 2 of air-core reactor, and the heat transferred of winding 2 is gone out; The evaporation section of the separate type heat pipe exchanger of three phase winding correspondences of air-core reactor links together by pipe 4,5.The condensation segment 8 of separate type heat pipe exchanger closely contacts with casing 9, and the outer correspondence position of casing is installed radiator 10, with all heat transferred of inside in air.The material of heat pipe evaporator section tube wall is chosen as the insulating material of heat conduction, guarantees thermal conductivity and insulating properties simultaneously.The condensation segment that connects separate type heat pipe exchanger is what separate with the

pipe

3,6 of evaporation section in initial designs, and is just that it is airtight after winding installs, and injects liquid then and vacuumizes.Casing is airtight at last, also need vacuumize the back and inject other insulating gass, as sulphur hexafluoride, nitrogen etc.The 7th, the magnetic conduction bar because the leakage field of air-core reactor is relatively more severe, adopts the magnetic conduction bar can reduce the loss that leakage field causes.

Claims

1, a kind of gas insulating dry reactor without core, comprise the reactor winding in the casing, be full of insulating gas in the casing, casing is equipped with radiator outward, it is characterized in that: between described casing and the reactor winding heat exchanger is arranged, heat exchanger closely is connected with casing and radiator on one side, and another side closely is connected with the reactor winding.

2, gas insulating dry reactor without core according to claim 1 is characterized in that: described casing is airtight structure, and the inside is full of insulating gas.

3, according to claim 1,2 described gas insulating dry reactor without core, it is characterized in that: described heat exchanger is a heat pipe.

4, gas insulating dry reactor without core according to claim 3 is characterized in that: all or part of material therefor of the tube wall of described heat pipe evaporator section is a heat-conducting insulation material, and the thermal conductivity of this material is greater than 1W/mK.

5, gas insulating dry reactor without core according to claim 3 is characterized in that: described heat pipe is evaporation section and the separated separate heat pipe of condensation segment.

6, gas insulating dry reactor without core according to claim 4 is characterized in that: described heat pipe is evaporation section and the separated separate heat pipe of condensation segment.

7, according to claim 1,2,4,5,6 described gas insulating dry reactor without core, it is characterized in that: around described airtight casing, the magnetic conduction bar of anti-leakage field is installed.