CN203706799U - Main transformer plate type cooling device with SF6 medium as coolant - Google Patents

Abstract

The utility model relates to a main transformer plate type cooling device with an SF6 medium as the coolant. The main transformer plate type cooling device is composed of an SF6 coolant circulation system and a transformer oil flow cooling circulation system. The SF6 coolant circulation system comprises an SF6 refrigeration compressor, a cooler, a throttle valve and an SF6 board slot set of an SF6 plate type evaporator. The transformer oil flow cooling circulation system comprises a main transformer body, an oil pump and an oil flow board slot set of the SF6 plate type evaporator. Each SF6 board slot in the SF6 board slot set and the corresponding oil flow board slot in the oil flow board slot set overlap in a staggered mode. Cold transformer oil flowing in the main transformer body carries away heat generated by a coil and an iron core, and hot transformer oil in the oil flow board slot set conducts heat exchange with the low-temperature SF6 coolant in the SF6 board slot set through a metal plate wall. The main transformer plate type cooling device has the great advantages of being safe, reliable, high in cooling efficiency, small in size, low in oil consumption and maintenance, economical in overall operation and the like, thereby being a revolutionary innovation in main transformer cooling modes.

Description

A kind of with SF 6for the main transformer board type radiator of coolant media

Technical field

The utility model relates to a kind of with SF ₆for the main transformer board type radiator of coolant media.

Background technology

Main transformer is in running, due to the effect of electricity and magnetic, its coil and iron core can generate heat, as can not be in time this heat taken away, to cause main transformer to burn the even serious accident of blast, therefore must come cooling coil and iron core by the transformer oil stream being full of in main transformer, and the heat that transformer oil stream is taken away needs to carry out heat exchange by heat abstractor, cooled cold oil stream enters main transformer body again and carries out cooling.The tradition main transformer type of cooling is mainly three kinds of air blast cooling, natural air cooled and water-cooleds, although water-cooled is economical, efficiency is also high, if if generation cooling water in cooling system is to main transformer Seepage, even minor leakage also will cause serious consequence; Air-cooled because air heat content is low, make main transformer cooling effectiveness low, main transformer, heat sink apparatus are manufactured the shortcomings such as bulky, many by oil mass, operating cost is high, maintenance is large.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of with SF ₆for the main transformer board type radiator of coolant media, can take away safe, reliable, efficient, economically the heat energy that main transformer in service produces, safety, the economical operation of powerful guarantee electric power system main transformer.

To achieve these goals, the technical solution of the utility model is: a kind of with SF ₆for the main transformer board type radiator of coolant media, comprise SF ₆refrigerant compressor, cooler, choke valve and SF ₆plate-type evaporator, described SF ₆plate-type evaporator is by walking SF ₆the SF of coolant media ₆board slot group and the oil stream board slot group composition of walking transformer oil, described SF ₆each SF of board slot group ₆board slot is overlapping with each oil stream board slot of oil stream board slot group, described SF ₆the outlet of board slot group connects SF ₆the import of refrigerant compressor, described SF ₆the outlet of refrigerant compressor connects the import of cooler, and the outlet of described cooler connects SF by choke valve ₆the import of board slot group; The import of described oil stream board slot group connects the hot oil outlet of main transformer body bottom, described hot oil outlet is provided with deep fat delivery valve, the outlet of described oil stream board slot group connects the cold oil import on main transformer body top, described cold oil import is provided with cold oil inlet valve, and the heat transformer oil in described main transformer body is delivered in oil stream board slot group by oil pump.

Further, described choke valve is electromagnetic throttle valve, and described electromagnetic throttle valve is electrically connected at control module.

Further, described SF ₆on pipeline between the group outlet of oil stream board slot and the cold oil import of main transformer body of plate-type evaporator, oil temperature on-line measuring device is installed, described oil temperature on-line measuring device is electrically connected at control module.

Compared with prior art, the utlity model has following beneficial effect: due to the SF using ₆medium, it is except having good insulation, arc extinguishing, putting out combustion performance and stable physicochemical property, or a kind of good refrigerant that has higher thermal enthalpy, the plate evaporation heat absorption type of cooling using it as refrigerant is compared with traditional main transformer type of cooling, have safe and reliable, cooling effectiveness is high, equipment volume is little, few by oil mass, safeguard less, overall operation economic dispatch huge advantage, be the revolutionary character innovation of the power transformer type of cooling.

The utility model had both overcome in the middle of prior art with the main transformer of water-cooling pattern and is in operation and occurs to main transformer body seepage as cooling system, even small seepage all will produce catastrophe failure in main transformer under high voltage environment, and the serious consequence of even exploding; The shortcomings such as prior art is central because air heat content is low, makes main transformer cooling effectiveness low with air blast cooling or natural air cooled main transformer, and device fabrication volume is large, many by oil mass, operating cost is high, maintenance workload is large are overcome again; Compared with being now widely used traditional main transformer radiating mode, the utility model has huge advantage.

Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.

Brief description of the drawings

Fig. 1 is the transformer oil stream cooling recirculation system schematic diagram of the utility model embodiment.

Fig. 2 is the SF of the utility model embodiment ₆coolant circulating system schematic diagram.

Fig. 3 is the SF of the utility model embodiment ₆plate-type evaporator end view.

Fig. 4 be the utility model embodiment with SF ₆for the main transformer board type radiator schematic diagram of coolant media.

Fig. 5 is that the control module of the utility model embodiment is controlled cold oil stream temperature functional-block diagram automatically.

In figure: 1-SF ₆refrigerant compressor, 2-cooler inlet pipe, 3-cooler, 4-cooling blower, 5-cooler goes out pipe, 6-choke valve, 7-SF ₆plate-type evaporator, 8-SF ₆the import of board slot group, 9-SF ₆the outlet of board slot group, 10-deep fat delivery valve, 11-oil pump, 12-oil pump outlet valve, the import of 13-oil stream board slot group, the outlet of 14-oil stream board slot group, 15-oil temperature on-line measuring device, 16-cold oil inlet valve, 17-coil and iron core, 18-transformer oil, 19-main transformer body, 20-conservator, the single SF of a- ₆board slot, the single oil stream of b-board slot.

Embodiment

As shown in Fig. 1 ~ 4, a kind of with SF ₆for the main transformer board type radiator of coolant media, comprise SF ₆refrigerant compressor 1, cooler 3, choke valve 6 and SF ₆plate-type evaporator 7, described SF ₆plate-type evaporator 7 is by walking SF ₆the SF of coolant media ₆board slot group and the oil stream board slot group composition of walking transformer oil 18, described SF ₆each SF of board slot group ₆board slot is overlapping with each oil stream board slot of oil stream board slot group, described SF ₆the outlet 9 of board slot group connects SF ₆the import of refrigerant compressor 1, described SF ₆the outlet of refrigerant compressor 1 connects the import of cooler 3, and the outlet of described cooler 3 connects SF by choke valve 6 ₆the import 8 of board slot group; The import 13 of described oil stream board slot group connects the hot oil outlet of main transformer body 19 bottoms, described hot oil outlet is provided with deep fat delivery valve 10, the outlet 14 of described oil stream board slot group connects the cold oil import on main transformer body 19 tops, described cold oil import is provided with cold oil inlet valve 16, and the heat transformer oil in described main transformer body 19 is delivered in oil stream board slot group by oil pump 11.

In the present embodiment, described SF ₆refrigerant compressor 1, cooler 3, choke valve 6 and SF ₆the SF of plate-type evaporator 7 ₆board slot group etc. has formed SF ₆coolant circulating system, wherein cooler 3 can be the forced air cooler of being forced quenching by cooling blower 4, can be also water cooler, owing to being SF in cooler 3 ₆media for heat exchange, therefore just in case cooling water seepage is also irrelevant with main transformer oil stream; Described SF ₆that plate-type evaporator 7 has is safe and reliable, heat exchange efficiency is high, cleaning is easy, safeguard the advantages such as simple.Described main transformer body 19, oil pump 11 and SF ₆the oil stream board slot group of plate-type evaporator 7 etc. has formed transformer oil stream cooling recirculation system, the outlet of described oil pump 11 is provided with oil pump outlet valve 12, the transformer oil 18 that wherein main transformer body 19 its inside are full of mainly plays insulation and cooling effect, main transformer coil and iron core 17 are in operation because the effect of electricity, magnetic can be generated heat, as not in time this heat taken away, will cause main transformer to burn the even serious accident of blast.Regulate cooling rate, the outlet of described cooler 3 and SF for convenient according to actual conditions ₆on pipeline between the import 8 of board slot group, choke valve 6 is installed, with to high temperature SF ₆liquid carries out expenditure and pressure.For the convenient oil outlet temperature that detects oil stream board slot group in evaporator, described SF ₆on pipeline between the group outlet of oil stream board slot and the cold oil import of main transformer body 19 of plate-type evaporator 7, oil temperature on-line measuring device 15 is installed.

In the present embodiment, in order to facilitate intelligent automatic control, specifically electromagnetic throttle valve of described choke valve 6, specifically temperature monitor of described oil temperature on-line measuring device 15, described SF ₆plate-type evaporator 7 is interior can be provided with the inner SF of induction ₆the pressure sensor of gas pressure; Described temperature monitor, electromagnetic throttle valve and pressure sensor are all electrically connected at control module, its institute's evaporator that detects oil stream board slot group oil outlet temperature signal is sent to control module by described temperature monitor, described control module regulates the valve opening of electromagnetic throttle valve, and described control module can be to make by technological requirement design programming the PLC or the single-chip microcomputer etc. that form.Work as SF ₆when the oil outlet temperature of plate-type evaporator 7 oil stream board slot groups is too high, the valve opening of electromagnetic throttle valve is turned in described control module control down, reduces SF ₆plate-type evaporator SF ₆sF in board slot group ₆evaporating pressure, and then reduce SF ₆plate-type evaporator SF ₆sF in board slot group ₆evaporating temperature, to reduce SF ₆the oil outlet temperature of plate-type evaporator 7 oil stream board slot groups is contrary conversely.

As shown in Fig. 1 ~ 4, should be with SF ₆for the using method of the main transformer board type radiator of coolant media is carried out according to the following steps: (1) opens deep fat delivery valve 10 and the cold oil inlet valve 16 of main transformer body 19; (2) open oil pump 11, SF ₆refrigerant compressor 1 and cooler 3; (3) heat that the interior mobile cold transformer oil of main transformer body 19 produces main transformer coil and iron core 17 is taken away, and cold transformer oil self is heated and become heat transformer oil; (4) heat transformer oil is squeezed into SF by oil pump 11 ₆the oil stream board slot group of plate-type evaporator 7, and by metal wooden partition and staggered adjacent SF ₆low temperature SF in board slot group ₆refrigerant carries out heat exchange, and its heat is by low temperature SF ₆refrigerant is taken away and is become cold transformer oil; (5) cold transformer oil comes back in main transformer main body through cold oil inlet valve 16, and coil and iron core 17 are carried out to next round cool cycles.

In the present embodiment, in step (2), open SF ₆when refrigerant compressor 1 and cooler 3, SF ₆refrigerant compressor 1 will be from SF ₆plate-type evaporator SF ₆board slot group low pressure SF out ₆gas compression becomes high pressure-temperature SF ₆gas, high pressure-temperature SF ₆gas enters and in cooler 3, is cooled to high temperature SF ₆liquid, high temperature SF ₆liquid flow to SF after choke valve 6 expenditure and pressure coolings ₆plate-type evaporator SF ₆in board slot group and carry out heat exchange by metal wooden partition with the heat transformer oil in oil stream board slot group and flash to low pressure SF ₆gas, low pressure SF ₆gas is pumped down to again SF ₆compression in refrigerant compressor 1, with this iterative cycles.

In the present embodiment, in step (2), from cooler 3 high temperature SF out ₆liquid flow to SF after choke valve 6 throttlings ₆the SF of plate-type evaporator 7 ₆the import 8 of board slot group, now because volume sudden enlargement causes part high temperature SF ₆liquid rotating becomes low pressure SF ₆gas, liquid evaporation becomes in the process of gas can a large amount of heat absorptions and make high temperature SF ₆fluid temperature sharply declines, the low temperature SF after temperature declines ₆liquid all flashes to low pressure SF after the heat that absorbs a large amount of heat transformer oil ₆gas, low pressure SF ₆gas is through SF ₆the oil stream board slot group outlet of plate-type evaporator is back to SF ₆the import of refrigerant compressor 1, carries out next round heat exchange circulation.

In the present embodiment, for the convenient oil outlet temperature that detects oil stream board slot group in evaporator, described SF ₆on pipeline between the group outlet of oil stream board slot and the cold oil import of main transformer body 19 of plate-type evaporator 7, oil temperature on-line measuring device 15 is installed.In order to facilitate intelligent automatic control, specifically electromagnetic throttle valve of described choke valve 6, specifically temperature monitor of described oil temperature on-line measuring device 15, described SF ₆plate-type evaporator 7 is interior can be provided with the inner SF of induction ₆the pressure sensor of gas pressure, described temperature monitor, electromagnetic throttle valve and pressure sensor are all electrically connected at control module.As shown in Figure 5, can, according to the real-time online data of temperature monitor, regulate electromagnetic throttle valve automatically to control SF by control module ₆plate-type evaporator SF ₆sF in board slot group ₆evaporating pressure and SF ₆evaporating temperature, to ensure SF ₆the oil outlet temperature of transformer oil of being cooled in plate-type evaporator oil stream board slot group is controlled in the scope of setting.

The foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.

Claims (3)

1. one kind with SF ₆for the main transformer board type radiator of coolant media, it is characterized in that: comprise SF ₆refrigerant compressor, cooler, choke valve and SF ₆plate-type evaporator, described SF ₆plate-type evaporator is by walking SF ₆the SF of coolant media ₆board slot group and the oil stream board slot group composition of walking transformer oil, described SF ₆each SF of board slot group ₆board slot is overlapping with each oil stream board slot of oil stream board slot group, described SF ₆the outlet of board slot group connects SF ₆the import of refrigerant compressor, described SF ₆the outlet of refrigerant compressor connects the import of cooler, and the outlet of described cooler connects SF by choke valve ₆the import of board slot group; The import of described oil stream board slot group connects the hot oil outlet of main transformer body bottom, described hot oil outlet is provided with deep fat delivery valve, the outlet of described oil stream board slot group connects the cold oil import on main transformer body top, described cold oil import is provided with cold oil inlet valve, and the heat transformer oil in described main transformer body is delivered in oil stream board slot group by oil pump.

2. according to claim 1 with SF ₆for the main transformer board type radiator of coolant media, it is characterized in that: described choke valve is electromagnetic throttle valve, and described electromagnetic throttle valve is electrically connected at control module.

3. according to claim 1 and 2 with SF ₆for the main transformer board type radiator of coolant media, it is characterized in that: described SF ₆on pipeline between the group outlet of oil stream board slot and the cold oil import of main transformer body of plate-type evaporator, oil temperature on-line measuring device is installed, described oil temperature on-line measuring device is electrically connected at control module.