CN113606690A

CN113606690A - Indoor transformer substation air conditioning system and air conditioning method

Info

Publication number: CN113606690A
Application number: CN202110408970.5A
Authority: CN
Inventors: 丁斌; 熊天军; 刘敬文; 李国鹏; 苑娇阳; 李伟刚; 张萌; 陈永旺
Original assignee: Xiongan New Area Power Supply Co of State Grid Hebei Electric Power Co Ltd; State Grid Corp of China SGCC
Current assignee: Xiongan New Area Power Supply Co of State Grid Hebei Electric Power Co Ltd; State Grid Corp of China SGCC
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-11-05

Abstract

The invention provides an indoor transformer substation air conditioning system and an air conditioning method. The system comprises a heating subsystem of a personnel on duty room and an equipment heat dissipation subsystem. The heating subsystem uses water as a working medium, the equipment heat dissipation subsystem uses oil with high stability as a working medium, and the equipment heat dissipation system is combined with the duty room heating system. Direct cooling is carried out to oil pipe through mechanical ventilation in summer, and then takes away the equipment heat, utilizes water and oil heat transfer winter, reduces oil temperature, can be applied to the heat that equipment gived off simultaneously in the room on duty supplies heat, has reached the high-efficient use of energy, the good technological effect of energy saving.

Description

Indoor transformer substation air conditioning system and air conditioning method

Technical Field

The invention relates to the field of transformer substation devices, in particular to a heating ventilation air-conditioning system and an air-conditioning method of a transformer substation.

Background

The transformer substation is a special functional building, and with the development of power transmission and distribution technology, tasks, functions and the like of the transformer substation are also developed. The indoor transformer substation arranges equipment such as a main transformer, a capacitor and a reactor of a conventional transformer substation indoors, undertakes power exchange between a load area and a power grid, and achieves the effects of saving land resources, reducing radiation hazard of the transformer substation, better guaranteeing human body safety and the like. However, the indoor transformer substation has many devices with large heat productivity, and the special working environment thereof causes high indoor temperature, high humidity, easy condensation and the like, and the indoor environment harms human health and the safe operation of electrical equipment, and the temperature and humidity need to be adjusted. In the prior art, the problem is mainly solved by arranging devices with single functions such as ventilation, air conditioning and the like.

The existing patent solves the heat dissipation problem of indoor substation equipment by installing a cooling device. If CN 110620343B proposes a transformer substation cooling device, reducible artifical participation, improve cooling efficiency, guarantee to also can normal operating in the higher summer of temperature or the higher condition of power consumption load. CN 111969459A provides a multiple radiating box-type substation, can effectively avoid the inside electrical components high temperature of box-type substation main part to damage, guarantees the stability of work. CN 211958517U provides a box-type substation with good heat dissipation's rain-proof top cap, has rain-proof and good heat dissipation's characteristics. Besides transformer substation cooling equipment, a patent also provides that a ventilation device is used for solving the problem of heat dissipation of equipment in a transformer substation. CN 211879902U proposes a box-type substation convenient to circulation of air to solve the transformer substation and can't in time dispel the heat and lead to the too big problem of inside temperature. CN 211859283U provides one kind and can realize the good ventilation effect to box-type substation, avoids the transformer substation to lead to damaging because of the high temperature, has improved the box-type substation that the ventilation effect is good of practicality. CN 110350424B provides a box-type substation air inlet structure, adopts the design of multilayer heap, has effectively reduced area, and the design of barrel formula has formed the chimney effect simultaneously, has strengthened inside air cycle.

The transformer substation is provided with rooms such as a duty room and the like in which personnel move for a long time except for a secondary room of equipment which needs cooling all the year around due to heating of the equipment, and the rooms need cooling in summer and heating in winter. In the prior art, separate air conditioning equipment is adopted for indoor temperature and humidity control of two types of rooms with different requirements, the requirements of the two types of rooms in winter are not considered to be mutually supplemented, the equipment supplies cold for a secondary room, and supplies heat for a duty room, so that certain energy loss is caused. Aiming at the defects of the system, an air conditioning system capable of combining two types of rooms with different requirements to realize heat recovery is lacked.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an indoor transformer substation air conditioning system, which comprises a heating subsystem and an equipment heat dissipation subsystem of a personnel on-duty room, wherein:

the heating subsystem of the personnel on duty room comprises a radiation floor, a coil pipe and an oil-water heat exchanger, wherein the coil pipe is connected with the oil-water heat exchanger through a pipeline to form a radiation hot water heat exchange loop;

the equipment heat dissipation subsystem comprises an equipment-oil heat dissipater, an oil-air heat exchanger, a fan and an oil-water heat exchanger, wherein oil flows out of the equipment-oil heat dissipater and then is divided into two branches:

the first branch enters the oil-air heat exchanger, exchanges heat with air and then flows back to the equipment-oil radiator through a pipeline;

and the second branch enters the oil-water heat exchanger, exchanges heat with water in the radiant hot water heat exchange loop, and then flows back to the equipment-oil radiator through a pipeline.

Further, the first branch and the second branch do not operate at the same time, and when one branch operates, the other branch stops operating.

The invention also provides an air conditioner adjusting method of the indoor transformer substation, which comprises the following steps:

s1: providing a heating subsystem for a person duty room of the indoor transformer substation, wherein the person duty room heating subsystem comprises a radiation floor, a coil pipe and an oil-water heat exchanger, and the coil pipe is connected with the oil-water heat exchanger through a pipeline to form a radiation hot water heat exchange loop;

s2: providing an equipment heat dissipation subsystem for equipment of the indoor substation, wherein the equipment heat dissipation subsystem comprises an equipment-oil heat radiator, an oil-air heat exchanger, a fan, an oil-water heat exchanger, a plurality of pipelines and valves; the oil is divided into two branches after flowing out of the equipment-oil radiator:

the branch II enters the oil-water heat exchanger, exchanges heat with water in the radiant hot water heat exchange loop and then flows back to the equipment-oil radiator through a pipeline;

s3: in summer working conditions, the heating subsystem is closed, the second branch is cut off, and the first branch is opened, so that the heat of the equipment is exchanged into the air through the oil-air heat exchanger;

and when working conditions are in winter, the functional subsystem is opened, the first branch is cut off, and the second branch is opened, so that the heat of the equipment is exchanged to the heating subsystem through the oil-water heat exchanger and is used for heating a duty room of a person.

The invention can realize the following technical effects:

(1) the device of the invention utilizes mechanical ventilation to cool the oil pipe in summer in the secondary room, achieves the effect of heat dissipation through heat exchange with water in winter, can obtain a free heat source for a person on duty room in winter, and has the advantages that the system energy consumption mainly comprises transmission and distribution energy consumption and a fan, thereby effectively saving energy.

(2) According to the invention, the oil pipe is adopted to exchange heat with the equipment, the safety of oil in the transformer substation is higher, the oil can enter the equipment through oil heat exchange, and the fins are utilized to directly contact with the equipment for heat exchange, so that the heat exchange area is increased, and the cooling performance is enhanced.

(3) The oil pipes are connected in parallel, path conversion can be indirectly and effectively realized through switching the valves in summer and winter, and the device is simple to transpose and easy to operate.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are needed in the embodiments or the prior art descriptions will be briefly described below.

Fig. 1 is a schematic structural diagram of an indoor substation air conditioning system provided by the invention.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings, which are provided solely for a better understanding of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the patented embodiments of the invention without any inventive step, are within the scope of protection of the invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second," if any, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

With reference to fig. 1, the present invention discloses an indoor substation air conditioning system, which includes a heating subsystem and an equipment heat dissipation subsystem for a person on duty room, wherein:

the heating subsystem of the personnel on duty room comprises a radiation floor 5, a coil 6 and an oil-water heat exchanger 9, wherein the coil 6 is connected with the oil-water heat exchanger 9 through a pipeline to form a radiation hot water heat exchange loop;

the equipment heat dissipation subsystem comprises an equipment-oil heat dissipater 3, an oil-air heat exchanger 10, a fan 4 and an oil-water heat exchanger 9, wherein oil flows out of the equipment-oil heat dissipater 3 and then is divided into two branches:

the first branch enters the oil-air heat exchanger 10 and exchanges heat with air, and then flows back to the equipment-oil radiator 3 through a pipeline;

and the second branch enters the oil-water heat exchanger 9, exchanges heat with water in the radiant hot water heat exchange loop, and then flows back to the equipment-oil radiator 3 through a pipeline.

Specifically, the first branch and the second branch are not operated at the same time, and when one branch is operated, the other branch is stopped.

To more particularly describe the disclosed embodiments of the present invention, reference is made to FIG. 1 for a detailed description. In the figure 1, the left side is a personnel on-duty room 1, the energy supply requirement is cooling in summer and heating in winter, the right side is an equipment secondary room 2, and the energy supply requirement is cooling in summer and cooling in winter. Pipelines G1 and G2 are water circulation systems for supplying heat to the operator duty room in winter, and pipelines G3, G4, G5, G6, G7 and G8 are oil circulation systems for radiating heat of equipment in the secondary room in winter and summer. A radiation floor 6 is laid in a floor 5 in a person duty room 1 and used for heat supply in winter, a valve 11 is arranged on a water outlet pipe G1 of the radiation floor, low-temperature water enters an oil-water heat exchanger 9 to exchange heat to produce high-temperature water, a valve 10 and a water supply pump 7 are arranged on a water outlet pipe G2, and hot water enters the radiation floor to supply heat to the room. An oil pipe in the equipment-oil heat exchanger 3 in the equipment secondary chamber exchanges heat with the equipment and is used for cooling the equipment, and the component operates all the year round. Low-temperature oil enters from an oil inlet pipe G3, a valve 17 and an oil supply pump 8 are arranged on an oil pipe G3, heat exchange cooling is carried out through an oil outlet pipe G4 after heat exchange of the oil inlet pipe G3, a valve 16 is arranged on an oil outlet pipe G4, high-temperature oil directly enters the oil pipe G6 in summer and then enters the oil-air heat exchanger 10, a valve 12 is arranged on an oil pipe G6, mechanical ventilation is carried out on a fan 4, the oil pipe is cooled, the cooled low-temperature oil returns from G5, a valve 13 is arranged on an oil pipe G5, and finally the low-temperature oil can enter G3 again to carry out heat exchange again. High-temperature oil in winter enters an oil pipe G8 from an oil outlet pipe G4, enters an oil-water heat exchanger 9 to exchange heat with water and reduce the temperature, and then returns through an oil pipe G7. Wherein,

valves

14 and 15 are respectively arranged on the oil pipes G8 and G7.

The working flow of the system in summer is as follows: the equipment heat dissipation is completed by mechanical ventilation, a fan 4 and an oil pump 8 in a secondary chamber equipment heat dissipation system are opened,

valves

12, 13, 16 and 17 are opened, other valves and other parts are closed, and a duty room heat supply system is completely closed. The flowing condition of the oil medium in the oil pipe of the heat dissipation system is as follows: the low-temperature oil is conveyed by the oil pump 8, enters the equipment-oil radiator 3 from the pipeline G3 to perform sufficient heat exchange with the equipment, cools the equipment, is output at a higher temperature through the valve 16 and the oil pipe G4, and the high-temperature oil enters the oil pipe G6 and the valve 12 and finally enters the oil-air heat exchanger 10. The fan 4 drives the outdoor air to perform forced heat exchange with the oil pipe 10 to cool the oil, and the low-temperature oil is output from the heat exchanger, enters the valve 13, the oil pipe G5 and the valve 17, returns to the oil pump again, and performs the next cooling and heat dissipation cycle.

The working flow of the system in winter is as follows: in winter, equipment heat dissipation and heat supply requirements are combined, an oil pump 8,

valves

14, 15, 16 and 17 in a secondary room equipment heat dissipation system are opened, other valves, a fan and other parts are closed, a duty room radiation floor is put into use, and a water pump 7,

valves

10 and 11 are opened. The flowing condition of the oil medium in the oil pipe of the heat dissipation system is as follows: the low-temperature oil is conveyed by the oil pump 8, enters the equipment-oil radiator 3 from the pipeline G3 to fully exchange heat with the equipment, cools the equipment, is output at a higher temperature through the valve 16 and the oil pipe G4, enters the oil pipe G8 and the valve 14, finally enters the oil-water heat exchanger 9 to exchange heat with a water pipe, cools the oil, is output from the heat exchanger to enter the valve 15, the oil pipe G7 and the valve 17, and returns to the oil pump again to perform the next cooling and heat dissipation circulation. The water flowing condition in the water pipe of the heat supply system of the duty room is as follows: high-temperature water is conveyed by a water pump 7, enters the radiation floor 6 from a water pipe G2 to supply heat to a room, low-temperature water after heat exchange enters a water outlet pipe G1, enters an oil-water heat exchanger 9 through a valve 11 to exchange heat with an oil pipe, and high-temperature water returns to the water pump again after being output from the heat exchanger and entering the valve 10 and the water pipe G2 to perform next heat supply circulation.

The beneficial effect that this embodiment can realize is:

Example 2

The embodiment discloses an indoor substation air conditioning method, which comprises the following steps:

s1: providing a heating subsystem for a person duty room of the indoor transformer substation, wherein the person duty room heating subsystem comprises a radiation floor 5, a coil 6 and an oil-water heat exchanger 9, and the coil 6 is connected with the oil-water heat exchanger 9 through a pipeline to form a radiation hot water heat exchange loop;

s2: providing an equipment heat dissipation subsystem for equipment of the indoor substation, wherein the equipment heat dissipation subsystem comprises an equipment-oil heat radiator 3, an oil-air heat exchanger 10, a fan 4, an oil-water heat exchanger 9, a plurality of pipelines and valves; the oil is divided into two branches after flowing out of the equipment-oil radiator 3:

the branch II enters the oil-water heat exchanger 9, exchanges heat with water in a radiation hot water heat exchange loop, and then flows back to the equipment-oil radiator 3 through a pipeline;

s3: in summer, the heating subsystem is closed, the second branch is cut off, and the first branch is opened, so that the heat of the equipment is exchanged into the air through the oil-air heat exchanger 10;

and in winter working conditions, the functional subsystem is opened, the first branch is cut off, and the second branch is opened, so that the heat of the equipment is exchanged to the heating subsystem through the oil-water heat exchanger 9 and is used for heating a duty room of a person.

The above embodiments are only used for explaining the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution should not be excluded from the protection scope of the present invention.

Claims

1. An indoor substation air-conditioning system, characterized in that: the system comprises a staff duty room heating subsystem and an equipment cooling subsystem, wherein:

The personnel duty room heating subsystem includes a radiant floor (5), a coil (6) and an oil-water heat exchanger (9), and a pipe is connected between the coil (6) and the oil-water heat exchanger (9). Roads are connected to form a radiant hot water heat exchange circuit;

The equipment cooling subsystem includes equipment-oil radiator (3), oil-air heat exchanger (10), fan (4), oil-water heat exchanger (9), oil from the equipment-oil After the radiator (3) flows out, it is divided into two branches:

The first branch circuit enters the oil-air heat exchanger (10) and exchanges heat with air, and then flows back to the equipment-oil radiator (3) through the pipeline;

The second branch enters the oil-water heat exchanger (9) and exchanges heat with the water in the radiant hot water heat exchange circuit, and then flows back to the equipment-oil radiator (3) through the pipeline.

2 . The system according to claim 1 , wherein the first branch and the second branch do not operate at the same time, and when one branch is running, the other branch stops running. 3 .

3. An indoor substation air conditioning method, characterized in that: the following steps:

S1: Provide a heating subsystem to the staff duty room of the indoor substation, the staff duty room heating subsystem includes a radiant floor (5), a coil (6) and an oil-water heat exchanger (9), the coil ( 6) Connect with the oil-water heat exchanger (9) through pipelines and form a radiant hot water heat exchange circuit;

S2: Provide equipment cooling subsystems for equipment in the indoor substation, where the equipment cooling subsystems include equipment-oil radiators (3), oil-air heat exchangers (10), fans (4), oil-water exchange Heater (9), several pipelines and valves; the oil is divided into two branches after flowing out from said equipment-oil radiator (3):

The second branch enters the oil-water heat exchanger (9) and exchanges heat with the water in the radiant hot water heat exchange circuit, and then flows back to the equipment-oil radiator (3) through the pipeline;

S3: In summer, the heating subsystem is closed and the second branch is cut off, and the first branch is opened, so that the heat of the equipment is exchanged into the air through the oil-air heat exchanger (10);

In winter conditions, open the functional subsystem and cut off the first branch, and open the second branch, so that the heat of the equipment is exchanged to the heating subsystem through the oil-water heat exchanger (9) and heats the duty room.