阅读说明：本技术 一种组串式储能散热系统 (Group string type energy storage heat dissipation system ) 是由 叶胜林 温进 曾伟 刘贺 于 2021-08-17 设计创作，主要内容包括：本发明涉及一种组串式储能散热系统,散热系统用于储能场站,储能场站中设有多个储能变流器,且每个储能变流器的交流侧设有一个变压器器组,散热系统包括多条并联设置的液冷支路和泵站单元以及外部换热单元,所有液冷支路的出口与泵站单元的入口连接,泵站单元的出口分别与液冷支路的入口以及外部换热器单元的入口连接,外部换热单元的出口与每一个液冷支路的入口连接,每条液冷支路均包括并联设置的多个液冷单元,多个液冷单元采用液冷形式对储能变流器和变压器器组进行散热。与现有技术相比,本发明的场站采用组串式散热系统,在满足场站散热的前提下能大幅降低冷却成本,同时对于大功率机组来说,场站组串式液冷方案布局紧凑且散热效果好。(The invention relates to a series type energy storage heat dissipation system, which is used for an energy storage station, wherein a plurality of energy storage converters are arranged in the energy storage station, a transformer group is arranged on the alternating current side of each energy storage converter, the heat dissipation system comprises a plurality of liquid cooling branches, a pump station unit and an external heat exchange unit which are arranged in parallel, outlets of all the liquid cooling branches are connected with inlets of the pump station unit, outlets of the pump station unit are respectively connected with inlets of the liquid cooling branches and inlets of the external heat exchange unit, an outlet of the external heat exchange unit is connected with an inlet of each liquid cooling branch, each liquid cooling branch comprises a plurality of liquid cooling units which are arranged in parallel, and the plurality of liquid cooling units adopt a liquid cooling mode to dissipate heat of the energy storage converters and the transformer group. Compared with the prior art, the station adopts the series-type cooling system, the cooling cost can be greatly reduced on the premise of meeting the requirement of station cooling, and meanwhile, for a high-power unit, the series-type liquid cooling scheme of the station is compact in layout and good in cooling effect.)

1. The utility model provides a group's string formula energy storage cooling system, cooling system is used for energy storage station, a serial communication port, be equipped with a plurality of energy storage converters in the energy storage station, and every energy storage converter's alternating current side is equipped with a transformer group, cooling system includes many parallelly connected liquid cooling branch roads and pump station unit and the outside heat transfer unit that sets up, all the export of liquid cooling branch road and the entry linkage of pump station unit, the export of pump station unit respectively with the entry of liquid cooling branch road and the entry linkage of outside heat exchanger unit, the export and each of outside heat transfer unit the entry linkage of liquid cooling branch road, every liquid cooling branch road all includes a plurality of liquid cooling units of parallelly connected setting, and is a plurality of the liquid cooling unit adopts the liquid cooling form right energy storage converter and transformer group dispel the heat.

2. The series energy storage cooling system of claim 1, wherein the liquid cooling unit comprises a first liquid cooling unit, the first liquid cooling unit cools 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 string-type energy storage and heat dissipation system 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 liquid cooling branch.

4. The series energy storage and heat dissipation system of claim 3, wherein a water temperature sensor and a pressure sensor are arranged at an outlet of the cold source pipeline of the oil-water heat exchanger.

5. The string-type energy storage and heat dissipation system according to claim 1, wherein the pump station unit comprises a circulation pump and a three-way valve, an inlet of the circulation pump is connected to outlets of the liquid cooling branches, an outlet of the circulation pump is connected to the three-way valve, one outlet of the three-way valve is directly connected to an inlet of each liquid cooling branch, and another outlet of the three-way valve is connected to an inlet of the external heat exchange unit.

6. The series energy storage and heat dissipation system of claim 5, wherein pressure sensors are disposed at the inlet and outlet of the circulation pump.

7. The string-type energy-storing and heat-dissipating system 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 to the pump station unit, and an outlet of the external heat exchanger is connected to an inlet of each liquid-cooling branch; the cooling fan is used for cooling the cooling liquid in the external heat exchanger.

8. The series energy storage and heat dissipation system of claim 7, wherein a water temperature sensor and a pressure sensor are provided at the inlet of all the liquid cooling branches.

9. The series type energy storage and heat dissipation system of any one of claims 1 to 8, wherein the number of the liquid cooling branches is greater than or equal to 2.

Technical Field

The invention relates to the technical field of energy storage converters, in particular to a series type energy storage heat dissipation system.

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 medium and large-scale wind power generation or solar power generation places, two or more sets of energy storage converters are generally required to be equipped, each set of energy storage converter and a transformer matched with the energy storage converter need to be cooled, at present, an air cooling mode is mainly adopted, an independent heat dissipation mode is adopted, the occupied area of the site layout is large, and meanwhile, the heat dissipation effect is poor.

Therefore, there is a need in the art for a heat dissipation system with compact layout and good heat dissipation effect.

Disclosure of Invention

The present invention provides a series-connected energy-storing heat-dissipating system to overcome the above-mentioned drawbacks of the prior art.

In order to achieve the object of the present invention, the present application provides the following technical solutions.

In the first aspect, this application provides a cluster formula energy storage cooling system, cooling system is used for the energy storage station, be equipped with a plurality of energy storage converters in the energy storage station, and every the interchange side of energy storage converter is equipped with a transformer group, cooling system includes many parallelly connected liquid cooling branch roads and pump station unit and the outside heat transfer unit that sets up, all the export of liquid cooling branch road and the entry linkage of pump station unit, the export of pump station unit respectively with the entry of liquid cooling branch road and the entry linkage of outside heat exchanger unit, the export and each of outside heat transfer unit the entry linkage of liquid cooling branch road, every liquid cooling branch road all includes a plurality of liquid cooling units that parallelly connected set up, and is a plurality of the liquid cooling unit adopts the liquid cooling form right energy storage converter and transformer group dispel the heat.

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 the oil-water heat exchanger, the exit of oil-water heat exchanger's heat source pipeline is connected with the transformer set respectively, the exit of oil-water heat exchanger's cold source pipeline communicates the exit of liquid 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 liquid 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 an inlet of each liquid 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 each liquid 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 all the liquid cooling branches.

In one embodiment of the first aspect, the number of the liquid cooling branches is greater than or equal to 2.

Compared with the prior art, the invention has the beneficial effects that:

(1) for the energy storage station, the cooling effect is good by adopting a series type concentrated liquid cooling scheme, the occupied area of the station is small, and the cooling cost is greatly reduced;

(2) each liquid cooling branch adopts the cooling mode of liquid cooling, will exchange big part PCS in side and transformer volume minimizing, and part cost and cooling system realize falling this.

Drawings

Fig. 1 is a schematic structural diagram of the series-connected energy storage heat dissipation system of the present application.

In the attached drawings, 1 is a pump station unit, 2 is an external heat exchanger unit, 3 is a liquid cooling branch inlet, 4 is a liquid cooling branch outlet, 5 is a circulating pump, 6 is a three-way valve, 7 is an external heat exchanger, 8 is a cooling fan, 9 is a pressure sensor, 10 is a water temperature sensor, 11 is a first liquid cooling unit, 12 is an energy storage converter, 13 is a second liquid cooling unit, 14 is an oil-water heat exchanger, 15 is a transformer set, 16 is an oil pump, and 17 is a liquid cooling branch.

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.

Traditional energy storage alternating current side PCS and transformer mainly adopt the air cooling mode, adopt independent heat dissipation mode, and the overall arrangement area of station is big, and the radiating effect is poor simultaneously. According to the scheme, the cooling cost can be greatly reduced on the premise of meeting the requirement of field heat dissipation, and meanwhile, for a high-power unit, the layout of the field-station-group-string-type liquid cooling scheme is compact and the heat dissipation effect is good.

In a specific embodiment, the present application provides a string type energy storage heat dissipation system, wherein a plurality of energy storage converters are arranged in a station, and each energy storage converter is provided with a transformer set on the ac side, the heat dissipation system comprises a plurality of liquid cooling branches and a pump station unit arranged in parallel and an external heat exchange unit, all the outlets of the liquid cooling branches are connected with the inlet of the pump station unit, the outlet of the pump station unit is divided into two paths, one path is connected with the inlet of each liquid cooling branch, the other path is connected with the inlet of the external heat exchange unit, the outlet of the external heat exchange unit is connected with the inlet of each liquid cooling branch, each liquid cooling branch comprises a first liquid cooling unit and a second liquid cooling unit arranged in parallel, the first liquid cooling unit adopts a liquid cooling form and dissipates heat of the energy storage converters, and the second liquid cooling unit adopts a liquid cooling form and dissipates heat of the transformer set. In this application, on the one hand, the mode through the liquid cooling is cooled down energy storage converter and transformer group, and on the other hand can utilize the concentrated refrigerated mode with the energy storage converter of many sets and transformer group to cool down the coolant liquid, can reduce the cooling cost by a wide margin under the radiating prerequisite in satisfying the field, and to high-power unit, the field is organized the compact and radiating effect of cluster formula liquid cooling scheme overall arrangement and is good simultaneously.

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 implementation manner, 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 liquid cooling branch.

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 implementation mode, 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 each liquid 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 an inlet of each liquid cooling branch, and the other outlet of the three-way valve is connected with an inlet of the external heat exchange unit. 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 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 each liquid cooling branch; the cooling fan is used for cooling the cooling liquid in the external heat exchanger.

In one embodiment, water temperature sensors and pressure sensors are arranged at the inlets of all the liquid cooling branches. In this application, can set up one set of water temperature sensor and pressure sensor alone at the liquid cooling branch entry of each, also one set of water temperature sensor and pressure sensor of all liquid cooling branches shares, if adopt the sharing, then set up it on the pipeline after external heat exchanger export and the three-way valve export mix.

In a specific embodiment, the number of the liquid cooling branches is more than or equal to 2.

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

In the present embodiment, a plurality of sets (only two sets are taken as an example in the figure) of energy storage converters 12 are arranged in the station, and a set of transformer group 15 is arranged on the ac side of each set of energy storage converters 12. Moreover, each set of energy storage converter 12 and the transformer group 15 that corresponds thereof are equally divided and are equipped with first liquid cooling unit 11 and second liquid cooling unit 13 respectively, and wherein, first liquid cooling unit 11 is used for cooling down energy storage converter 12, and second liquid cooling unit 13 is used for cooling down for transformer group 15, specifically as follows: the second liquid cooling unit 13 includes an oil pump 16 and a recuperator 14, wherein a heat source line of the recuperator 14 is connected to the transformer group 15, and cooling oil is circulated between the two by the oil pump 16. The cold source pipelines of the first liquid cooling unit 11 and the oil-water heat exchanger 14 are filled with cooling water.

Each set of the first liquid cooling unit 11 and the second liquid cooling unit 13 (namely, the cold source pipeline of the oil-water heat exchanger 14) are connected in parallel to form a liquid cooling branch 17, all the liquid cooling branches 17 are also connected in parallel, the outlet 4 of the liquid cooling branch is connected with the circulating pump 5 in the pump station unit 1, the outlet of the circulating pump 5 is connected with a three-way valve 6, the outlet of the three-way valve 6 is connected with the inlet of the external heat exchanger 7 in the external heat exchanger unit 2, and the outlet pipeline of the external heat exchanger 7 is connected with the liquid cooling branch inlet 3 after being converged with the other outlet pipeline of the three-way valve 6. The exterior heat exchanger unit 2 further comprises a cooling fan 8, which cooling fan 8 is arranged to cool the cooling water in the exterior heat exchanger 7.

The water outlet of each set of the first liquid cooling unit 11 and the outlet of the cold source pipeline of the oil-water heat exchanger 14 are respectively provided with a water temperature sensor 10 and a pressure sensor 9, the inlet and the outlet of the circulating pump 5 are respectively provided with a pressure sensor 9, and after the outlet pipeline of the external heat exchanger 7 is converged with another outlet pipeline of the three-way valve 6, the water temperature sensor 10 and the pressure sensor 9 are arranged.

The method comprises the steps that 1 energy storage converter 12 and 1 transformer set 15 in a single unit adopt a liquid cooling mode, water paths of the energy storage converter 12 and the transformer set 15 are connected in parallel, after cooling liquid enters each energy storage converter 12 and the transformer set 15, heat of the cooling liquid is absorbed through heat exchange and is heated into high-temperature cooling liquid, the high-temperature cooling liquid enters a main water return pipeline under the driving of a pump station unit 1, a water temperature sensor 10 is arranged on the main water inlet pipeline (namely a liquid cooling branch inlet 3) of the energy storage converter 12 and the transformer set 15 to detect the return water temperature, when the return water temperature exceeds a set water temperature (generally 10-60 ℃), a three-way valve 6 is opened at a certain angle to allow part of the high-temperature cooling liquid flowing out of a circulating pump 5 to enter an external heat exchanger 7 for heat dissipation, low-temperature cooling liquid flowing out of the external heat exchanger 7 is mixed with the high-temperature cooling liquid flowing out of the three-way valve 6 to form cooling liquid which meets the set temperature and enters the main water supply pipeline, and then enter each energy storage converter 12 and transformer 15.

The pump station unit 1 is provided with pressure sensors 9 at the inlet and the outlet of the circulating pump 5; a water temperature sensor 10 and a pressure sensor 9 are arranged on the main water inlet pipeline and are used for respectively detecting the water temperature and the pressure of the cooled device; the water return pipelines of the energy storage converters 12 and the transformer group 15 are also respectively provided with a water temperature sensor 10 and a pressure sensor 9 for detecting the respective water return temperature and pressure of the energy storage converters 12 and the transformer group 15, and meanwhile, the branch loops are respectively provided with a flow meter for detecting the flow of the cooling liquid flowing in and out of the energy storage converters 12 and the transformer group 15.

In particular, the present disclosure relates to a liquid-cooled transformer assembly 15, where the transformer assembly 15 may be a liquid-oil-cooled transformer or a wind-water heat exchange transformer, and the present disclosure takes the liquid-oil-cooled transformer assembly 15 as an example for explanation. This liquid oil-cooled transformer inside insulation oil drives through oil pump 16 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 14 and carries out the heat exchange with outside coolant liquid, and outside low temperature coolant liquid absorbs the heat of hot oil through oil water heat exchanger 14 and becomes high temperature coolant liquid, leaves oil water heat exchanger 14 under outside pump station unit 1 drive, thereby inside oil circuit and outside water route constantly circulate and reach the transformer radiating effect. The quantity and the structure of the oil-water heat exchangers 14 in the liquid oil cooling transformer are not limited.

For the energy storage unit with the power level of more than 3MW, the station with the unit of more than three groups adopts the group of series type heat dissipation systems, so that the cost advantage is great.

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.