CN113660835A - Integrated cooling system and method for energy storage alternating current side - Google Patents
Integrated cooling system and method for energy storage alternating current side Download PDFInfo
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- CN113660835A CN113660835A CN202110942465.9A CN202110942465A CN113660835A CN 113660835 A CN113660835 A CN 113660835A CN 202110942465 A CN202110942465 A CN 202110942465A CN 113660835 A CN113660835 A CN 113660835A
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- 238000001816 cooling Methods 0.000 title claims abstract description 156
- 238000004146 energy storage Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 239000000498 cooling water Substances 0.000 claims description 22
- 239000000110 cooling liquid Substances 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 description 9
- 239000002826 coolant Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to an integrated cooling system and method for an energy storage alternating current side, wherein the energy storage alternating current side comprises an energy storage converter and a transformer set, the cooling system comprises a plurality of liquid cooling units, a pump station unit and an external heat exchange unit, the plurality of liquid cooling units are used for radiating heat of the energy storage converter or the transformer set in a liquid cooling mode, the plurality of liquid cooling units are connected in parallel to form a cooling branch, an outlet of the cooling branch is connected with the pump station unit, an outlet of the pump station unit is divided into two paths, one path is directly connected with an inlet of the cooling branch, the other path is connected with an inlet of the external heat exchange unit, and an outlet of the external heat exchange unit is connected with an inlet of the cooling branch. Compared with the prior art, the cooling device and the cooling method can greatly reduce the volume of the part and further reduce the occupied area to improve the power density on the premise of better improving the cooling efficiency of the part and supporting capacity expansion, and have great advantages in cost and reliability.
Description
Technical Field
The invention relates to the technical field of energy storage converters, in particular to an integrated cooling system and method for an energy storage alternating current side.
Background
In the fields of wind power generation, photovoltaic power generation and the like, an energy storage converter (namely PCS) is an important component part, can control the charging and discharging processes of a storage battery, performs alternating current-direct current conversion, and can directly supply power for alternating current loads under the condition of no power grid. The energy storage converter comprises a dc side and an ac side, and comprises a transformer on the ac side. In the actual operation process, the energy storage converter and the transformer need to be cooled, and at present, an air cooling mode is mainly adopted, so that the single-machine capacity and the power density are small, the occupied area is large, and the single-power cost is high. And the air-cooled heat dissipation form has poor heat dissipation efficiency and protection grade, and has poor applicability to single-machine high-power outdoor complex environment scenes.
Therefore, there is a need in the art for a cooling system and method with high power density and good heat dissipation.
Disclosure of Invention
The object of the present invention is to overcome the above-mentioned drawbacks of the prior art by providing an integrated cooling system for the ac side of the stored energy.
It is also an object of the present application to provide an integrated cooling method for the ac side of the stored energy.
In order to achieve the object of the present invention, the present application provides the following technical solutions.
In a first aspect, the application provides an integration cooling device for energy storage alternating current side, energy storage alternating current side is including energy storage converter and transformer group, cooling system includes a plurality of liquid cooling units, pump station unit and outside heat transfer unit, wherein, a plurality of the liquid cooling unit adopts the liquid cooling form right energy storage converter or transformer group dispel the heat, and a plurality of liquid cooling units are parallelly connected and form the cooling branch road, and the export of cooling branch road with the pump station unit is connected, the export of pump station unit falls into two the tunnel, wherein directly with the entry linkage of cooling branch road all the way, another way is connected the entry of outside heat transfer unit, the export of outside heat transfer unit and the entry linkage of cooling branch road.
In an embodiment of the first aspect, the liquid cooling unit includes a first liquid cooling unit, the first liquid cooling unit dissipates heat from the energy storage converter, and a coolant outlet of the first liquid cooling unit is provided with a water temperature sensor and a pressure sensor.
In an embodiment of the first aspect, the liquid cooling unit includes a second liquid cooling unit, the second liquid cooling unit is right the transformer set dispels the heat, the second liquid cooling unit includes oil-water heat exchanger, the exit of oil-water heat exchanger's heat source pipeline is connected with transformer set respectively, the exit of oil-water heat exchanger's cold source pipeline communicates the exit of cooling branch road.
In an embodiment of the first aspect, a water temperature sensor and a pressure sensor are arranged at an outlet of the cold source pipeline of the oil-water heat exchanger.
In an embodiment of the first aspect, the pump station unit includes a circulation pump and a three-way valve, an inlet of the circulation pump is connected to an outlet of the cooling branch, an outlet of the circulation pump is connected to the three-way valve, one outlet of the three-way valve is directly connected to the inlet of the cooling branch, and another outlet of the three-way valve is connected to an inlet of the external heat exchange unit.
In one embodiment of the first aspect, a pressure sensor is provided at both the inlet and the outlet of the circulation pump.
In one embodiment of the first aspect, the external heat exchanger unit comprises an external heat exchanger and a cooling fan, an inlet of the external heat exchanger is connected with the pump station unit, and an outlet of the external heat exchanger is connected with an inlet of the cooling branch; the cooling fan is used for cooling the cooling liquid in the external heat exchanger.
In one embodiment of the first aspect, a water temperature sensor and a pressure sensor are provided at the inlet of the cooling branch.
In a second aspect, the present application also provides an integrated cooling method using the cooling device as described above, the cooling method comprising the steps of:
(1) cooling water is introduced from an inlet of the cooling branch, the energy storage converter and the transformer set are respectively radiated through the liquid cooling unit, and the heated cooling water is collected and then enters the pump station unit;
(2) detecting the temperature of cooling water at an inlet of the cooling branch, and if the temperature is lower than a set value, completely circulating the cooling water from the pump station unit to the inlet of the cooling branch; if the temperature is higher than the set value, part of the cooling water from the pump station unit enters the external heat exchanger unit, is mixed with the rest of the cooling water from the pump station unit after being cooled, and is recycled to the inlet of the cooling branch.
In one embodiment of the second aspect, in the step (2), the temperature is set to 10 to 60 ℃.
Compared with the prior art, the invention has the beneficial effects that:
(1) the alternating current side integrated liquid cooling scheme can minimize the volumes of the alternating current side large component PCS and the transformer, and reduce the cost of the components and the cooling system;
(2) the overall volume is small, the occupied area is small, and the power density is high;
(3) the heat dissipation capability has better ductility, and the heat dissipation performance of the cooling system is improved to support the capacity increase of the whole machine.
Drawings
Fig. 1 is a schematic structural diagram of an integrated cooling system according to the present application.
In the drawing, 1 is a first liquid cooling unit, 2 is a second liquid cooling unit, 3 is a pump station unit, 4 is an external heat exchanger unit, 5 is an energy storage converter, 6 is a transformer set, 7 is an oil-water heat exchanger, 8 is an oil pump, 9 is a circulating pump, 10 is a three-way valve, 11 is an external heat exchanger, 12 is a cooling fan, 13 is a water temperature sensor, and 14 is a pressure sensor.
Detailed Description
Unless otherwise defined, technical or scientific terms used herein in the specification and claims should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value.
While specific embodiments of the invention will be described below, it should be noted that in the course of the detailed description of these embodiments, in order to provide a concise and concise description, all features of an actual implementation may not be described in detail. Modifications and substitutions to the embodiments of the present invention may be made by those skilled in the art without departing from the spirit and scope of the present invention, and the resulting embodiments are within the scope of the present invention.
The traditional energy storage AC side PCS and transformer mainly adopt an air cooling mode, and have small single machine capacity and power density, large floor area and high single power cost; and the air-cooled heat dissipation form has poor heat dissipation efficiency and protection grade, and has poor applicability to single-machine high-power outdoor complex environment scenes. This scheme energy storage alternating current side integration heat dissipation scheme generally adopts the liquid cooling form, under the prerequisite that promotion part cooling efficiency that can be better supports the dilatation, reduces the part volume by a wide margin and then reduces area and promote power density, has great advantage in cost and reliability.
In one embodiment, the present application provides an integrated cooling device for the ac side of stored energy, the energy storage alternating current side comprises an energy storage converter and a transformer set, the cooling system comprises a first liquid cooling unit, a second liquid cooling unit, a pump station unit and an external heat exchange unit, wherein the first liquid cooling unit adopts a liquid cooling form and dissipates heat of the energy storage converter, the second liquid cooling unit adopts a liquid cooling form and dissipates heat of the transformer set, the first liquid cooling unit and the second liquid cooling unit are connected in parallel to form a cooling branch, and the outlet of the cooling branch is connected with the pump station unit, the outlet of the pump station unit is divided into two paths, wherein one path is directly connected with the inlet of the cooling branch, the other path is connected with the inlet of the external heat exchange unit, and the outlet of the external heat exchange unit is connected with the inlet of the cooling branch. In this application, energy storage converter and transformer group all adopt the mode of liquid cooling to cool off, and what adopt is prior art's liquid cooling mode, then cools down the coolant liquid through concentrating the refrigerated mode, reduces the part volume by a wide margin and then reduces area and promote power density, has great advantage in cost and reliability.
In one embodiment, a water temperature sensor and a pressure sensor are arranged at the cooling liquid outlet of the first liquid cooling unit.
In a specific embodiment, the second liquid cooling unit includes an oil-water heat exchanger, an inlet and an outlet of a heat source pipeline of the oil-water heat exchanger are respectively connected with the transformer set, and an inlet and an outlet of a cold source pipeline of the oil-water heat exchanger are communicated with an inlet and an outlet of the cooling branch. In this application, the used coolant liquid of the cold source pipeline of profit heat exchanger is the same with the used coolant liquid of first liquid cooling unit, generally is water. And cooling oil is filled in a heat source pipeline of the oil-water heat exchanger and is circulated between the transformer group and the oil-water heat exchanger through an oil pump.
In a specific embodiment, a water temperature sensor and a pressure sensor are arranged at an outlet of a cold source pipeline of the oil-water heat exchanger.
In a specific embodiment, the pump station unit includes a circulation pump and a three-way valve, an inlet of the circulation pump is connected to an outlet of the cooling branch, an outlet of the circulation pump is connected to the three-way valve, one outlet of the three-way valve is directly connected to the inlet of the cooling branch, and another outlet of the three-way valve is connected to an inlet of the external heat exchange unit.
In one embodiment, the inlet and the outlet of the circulation pump are provided with pressure sensors. The inlet pressure sensor of the circulating pump is used for measuring the PCS outlet pressure on one hand, and comparing the PCS outlet pressure with the PCS inlet pressure to see the PCS inlet-outlet pressure difference (flow resistance) so as to judge whether the PCS is blocked to cause the flow resistance to be increased or not, on the other hand, the inlet pressure of the water pump can be protected by the water pump, the pump needs to be stopped when the inlet pressure of the water pump is low, on the other hand, the inlet-outlet pressure difference of the water pump can be used for judging whether the pressure of the single water pump is normal or not, and the pump needs to be stopped for protection if the pressure difference is too small.
In a specific embodiment, the external heat exchanger unit comprises an external heat exchanger and a cooling fan, an inlet of the external heat exchanger is connected with the pump station unit, and an outlet of the external heat exchanger is connected with an inlet of the cooling branch; the cooling fan is used for cooling the cooling liquid in the external heat exchanger.
In one specific embodiment, a water temperature sensor and a pressure sensor are arranged at the inlet of the cooling branch.
Examples
The following will describe in detail the embodiments of the present invention, which are implemented on the premise of the technical solution of the present invention, and the detailed embodiments and the specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
The utility model provides an integration cooling device for energy storage alternating current side, its structure is shown in figure 1, and energy storage alternating current side mainly includes energy storage converter 5 and transformer group 6, and the cooling device of this embodiment includes first liquid cooling unit 1, second liquid cooling unit 2, pump station unit 3 and outside heat exchanger unit 4, and wherein, first liquid cooling unit 1 is used for cooling down energy storage converter 5, and second liquid cooling unit 2 is used for cooling down for transformer group 6, specifically as follows:
the second liquid cooling unit 2 comprises an oil pump 8 and an oil-water heat exchanger 7, wherein a heat source pipeline of the oil-water heat exchanger 7 is connected with the transformer set 6, and cooling oil is circulated between the oil pump 8 and the transformer set. And cooling water is filled in cold source pipelines of the first liquid cooling unit 1 and the oil-water heat exchanger 7.
The water outlet of the first liquid cooling unit 1 is connected with a circulating pump 9 in the pump station unit 3 after being converged with the outlet of the cold source pipeline of the oil-water heat exchanger 7, the outlet of the circulating pump 9 is connected with a three-way valve 10, one outlet of the three-way valve 10 is connected with the inlet of an external heat exchanger 11 in the external heat exchanger unit 4, and the outlet pipeline of the external heat exchanger 11 is connected with the inlet of the cold source pipeline of the oil-water heat exchanger 7 after being converged with the other outlet pipeline of the three-way valve 10. The exterior heat exchanger unit 4 further comprises a cooling fan 12, the cooling fan 12 being adapted to cool the cooling water in the exterior heat exchanger 11.
A water temperature sensor 13 and a pressure sensor 14 are arranged at the water inlet and the water outlet of the first liquid cooling unit 1 and the inlet and the outlet of the cold source pipeline of the oil-water heat exchanger 7 (in actual operation, the same set of the water temperature sensor 13 and the pressure sensor 14 can be used at the inlets of the first liquid cooling unit and the second liquid cooling unit, as shown in fig. 1). Pressure sensors 14 are provided at both the inlet and outlet of the circulation pump 9.
The first liquid cooling unit 1 and the second liquid cooling unit 2 are connected in parallel on a water path, after cooling water enters the energy storage converter 5 and the transformer set 6, the cooling water absorbs respective heat through heat exchange and is heated into high-temperature cooling water, the high-temperature cooling water enters a main water return pipeline under the driving of the pump station unit 3, a water temperature sensor 13 is arranged on a main water inlet pipeline of the energy storage converter 5 and the transformer set 6 to detect the return water temperature, when the return water temperature exceeds a water temperature set value, the three-way valve 10 is opened for a certain angle to allow part of the cooling water to enter the external heat exchanger 11 for heat dissipation, after the low-temperature cooling water flowing out of the external heat exchanger 11 is mixed with the high-temperature cooling water flowing out of the other outlet of the three-way valve 10, cooling liquid meeting the set temperature is formed and enters a main water supply pipeline, and then enters the energy storage converter 5 and the transformer set 6 respectively.
It should be noted that the pump station unit 3 is provided with pressure sensors 14 at the inlet and outlet of the circulating pump 9; a temperature and pressure sensor 14 is arranged on the water inlet pipeline to respectively detect the temperature and the pressure of water entering the cooled device; a water temperature sensor 13 and a pressure sensor 14 are respectively arranged on return water pipelines of the energy storage converter 5 and the transformer set 6 and used for detecting respective return water temperature and pressure of the energy storage converter 5 and the transformer set 6, and meanwhile, flow meters are respectively arranged on branch loops for detecting the flow of the cooling liquid flowing in and out of the energy storage converter 5 and the transformer set 6;
wherein, the liquid cooling loops of each heating device in the energy storage converter 5 adopt a series connection, a parallel connection or a series connection and a parallel connection mode, and each branch can carry out flow regulation.
In particular, the present invention relates to a liquid-cooled transformer, which can be a liquid-oil-cooled transformer or a wind-water heat exchange dry transformer, and is described by taking the liquid-oil-cooled transformer as an example. This liquid oil-cooled transformer internal insulation oil drives through oil pump 8 and cools off the winding and absorb the winding heat and become high temperature hot oil through the winding, and then gets into oil water heat exchanger 7 and external cooling who carries out the heat exchange, and outside low-temperature coolant liquid absorbs the heat of hot oil through oil water heat exchanger 7 and becomes high temperature cooling water, leaves oil water heat exchanger 7 under the drive of outside pump station unit 3, thereby inside oil circuit reaches the transformer radiating effect with outside water route ceaseless circulation. The number and the structure of the oil-water heat exchangers 7 in the liquid oil cooling transformer are not limited.
The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.
Claims (10)
1. The utility model provides an integration cooling device for energy storage alternating current side, energy storage alternating current side includes energy storage converter and transformer group, a serial communication port, cooling system includes a plurality of liquid cooling units, pump station unit and outside heat transfer unit, and wherein, a plurality of the liquid cooling unit adopts the liquid cooling form right energy storage converter or transformer group dispel the heat, and a plurality of liquid cooling units are parallelly connected and form the cooling branch road, and the export of cooling branch road with the pump station unit connection, the export of pump station unit falls into two the tunnel, wherein directly is connected with the entry of cooling branch road all the way, and another way is connected the entry of outside heat transfer unit, the export of outside heat transfer unit and the entry linkage of cooling branch road.
2. The integrated cooling device for an energy storage ac side of claim 1, wherein the liquid cooling unit comprises a first liquid cooling unit, the first liquid cooling unit dissipates heat from the energy storage converter, and a water temperature sensor and a pressure sensor are disposed at a cooling liquid outlet of the first liquid cooling unit.
3. The integrated cooling device for the energy storage alternating current side of claim 1, wherein the liquid cooling unit comprises a second liquid cooling unit, the second liquid cooling unit dissipates heat of the transformer set, the second liquid cooling unit comprises an oil-water heat exchanger, an inlet and an outlet of a heat source pipeline of the oil-water heat exchanger are respectively connected with the transformer set, and an inlet and an outlet of a cold source pipeline of the oil-water heat exchanger are communicated with an inlet and an outlet of the cooling branch.
4. The integrated cooling device for the energy storage alternating current side as claimed in claim 3, wherein a water temperature sensor and a pressure sensor are arranged at an outlet of a cold source pipeline of the oil-water heat exchanger.
5. The integrated cooling device for the energy storage alternating current side according to claim 1, wherein the pump station unit comprises a circulating pump and a three-way valve, an inlet of the circulating pump is connected with an outlet of the cooling branch, an outlet of the circulating pump is connected with the three-way valve, one outlet of the three-way valve is directly connected with the inlet of the cooling branch, and the other outlet of the three-way valve is connected with an inlet of the external heat exchange unit.
6. The integrated cooling device for the alternating current side of energy storage according to claim 5, wherein the inlet and the outlet of the circulation pump are provided with pressure sensors.
7. The integrated cooling device for the energy storage alternating current side according to claim 1, wherein the external heat exchanger unit comprises an external heat exchanger and a cooling fan, an inlet of the external heat exchanger is connected with the pump station unit, and an outlet of the external heat exchanger is connected with an inlet of the cooling branch; the cooling fan is used for cooling the cooling liquid in the external heat exchanger.
8. The integrated cooling device for the alternating current side of energy storage according to claim 1, wherein a water temperature sensor and a pressure sensor are arranged at the inlet of the cooling branch.
9. An integrated cooling method using the cooling apparatus according to any one of claims 1 to 8, wherein the cooling method comprises the steps of:
(1) cooling water is introduced from an inlet of the cooling branch, the energy storage converter and the transformer set are respectively radiated through the liquid cooling unit, and the heated cooling water is collected and then enters the pump station unit;
(2) detecting the temperature of cooling water at an inlet of the cooling branch, and if the temperature is lower than a set value, completely circulating the cooling water from the pump station unit to the inlet of the cooling branch; if the temperature is higher than the set value, part of the cooling water from the pump station unit enters the external heat exchanger unit, is mixed with the rest of the cooling water from the pump station unit after being cooled, and is recycled to the inlet of the cooling branch.
10. The integrated cooling method for the AC side of energy storage according to claim 9, wherein in step (2), the temperature is set to 10-60 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110942465.9A CN113660835A (en) | 2021-08-17 | 2021-08-17 | Integrated cooling system and method for energy storage alternating current side |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110942465.9A CN113660835A (en) | 2021-08-17 | 2021-08-17 | Integrated cooling system and method for energy storage alternating current side |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117117387A (en) * | 2023-10-19 | 2023-11-24 | 深圳市首航新能源股份有限公司 | Energy storage thermal management system |
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