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Multi-stage cooling system applied to energy storage power station and control method

A technology for cooling systems and energy storage power stations, applied in applications, household refrigeration devices, cooling fluid circulation devices, etc., can solve the problem of large temperature fluctuations that cannot meet the constant temperature requirements of energy storage power stations, the impact of electrical equipment insulation, short circuit fires in energy storage power stations, etc. problems, to achieve the effect of benefiting the operating life, avoiding condensation, and stabilizing the temperature of the water supply

Pending Publication Date: 2022-05-13
GUANGZHOU GOALAND ENERGY CONSERVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the heat exchange system is cooled by a cooling tower, only temperature sensors and flow metering devices are used to adjust the temperature of the cooling water. Such temperature control has large temperature fluctuations and cannot meet the constant temperature requirements of the energy storage power station; in addition, the existing technology Condensation will inevitably occur in the heat exchange system in 2. If the condensation is not effectively controlled, a certain amount of liquid water will be generated on the surface of related electrical equipment or components. When the liquid water mixes with dust, it will Corresponding conductive channels will be generated, which will affect the insulation of electrical equipment, and seriously cause short-circuit and fire in the energy storage power station

Method used

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  • Multi-stage cooling system applied to energy storage power station and control method
  • Multi-stage cooling system applied to energy storage power station and control method
  • Multi-stage cooling system applied to energy storage power station and control method

Examples

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Effect test

Embodiment 1

[0074] A multi-stage cooling system applied to an energy storage power station, using cooling water to take away the heat of the cooled device, the multi-stage cooling system is connected to the liquid cooling system of the cooled device, the multi-stage cooling system includes a control device, the system is as follows figure 1 As shown, including: the first-level thermal cycle loop, the second-level thermal cycle loop, and the third-level thermal cycle loop;

[0075] The first-stage thermal cycle loop includes: two main circulation pumps 1a and 1b with one working and one standby mode; the second-stage thermal cycle loop includes: secondary circulating water pump 5, plate heat exchanger 6; the third-stage thermal cycle loop Including: evaporator 10, condenser 11, condensing fan 8;

[0076] The first-stage thermal cycle loop is connected to the liquid cooling system of the cooled device; in the first-stage thermal cycle loop, the main circulation pump 1a in the working state ...

Embodiment 2

[0114] In Example 2 of the present invention, the GW-level large-scale energy storage station in Fujian Province was taken as the research object. The energy storage power station project selected lithium iron phosphate batteries as the energy storage medium for the 400MWh-level new lithium battery project. The working principle of lithium iron phosphate electrochemical energy storage power station: during the low period of electricity consumption, the abundant electric energy is stored; during the peak period of electricity consumption, the stored electric energy is transmitted and used, which can play a role in stabilizing the load curve of the substation.

[0115] The energy storage power station is composed of lithium iron phosphate energy storage batteries, energy storage converters, battery management systems, bus transformers, step-up (main) transformers, high-voltage power distribution devices and other equipment. During charging, the system converts the electrical ener...

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Abstract

According to the multi-stage cooling system applied to the energy storage power station and the control method, the system comprises three stages of thermal circulation loops, in the first stage of thermal circulation loop, cooling water is supplied to a cooled device liquid cooling system through a main circulation pump for heat exchange, and heat of the cooled device is transferred to be heat of the cooling water; cooling water flows through the plate heat exchanger of the second-stage heat circulation loop and exchanges heat with the cold media, and the heat of the cooling water is transferred as the heat of the cold media; a cold medium in the second-stage heat exchange circulation loop is supplied to an evaporator in the third-stage heat exchange circulation loop for heat exchange, and heat of the cold medium is brought into the environment by a condenser and a condensation fan; the water supply temperature of cooling water in the first-stage heat circulation loop is always higher than the dew point temperature of the environment where a cooled device is located. The liquid cooling system supplies cold to the energy storage power station in a concentrated mode, meanwhile, the water outlet temperature of the refrigerating unit and the water supply temperature of the cooled device are stably controlled, the condensation phenomenon is avoided, and the liquid cooling system is particularly suitable for cooling power electronic devices.

Description

technical field [0001] The invention belongs to the technical field of high-power electrical equipment cooling, and in particular relates to a multi-stage cooling system and a control method applied to an energy storage power station. Background technique [0002] At present, new energy storage is facing a critical period of transformation from the initial stage of commercialization to large-scale development. Based on the status quo of electric power development, hydropower and wind power are developing rapidly, but both are subject to the uneven temporal and spatial distribution of wind and solar resources. There are peaks and valleys in electric energy transmission, and there is a lack of stable power output. The establishment of energy storage power stations is particularly important in this context. As the supporting key equipment of battery energy storage power station, the water cooling system has already spread in the market, and the corresponding water cooling produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/627H01M10/633H01M10/6554H01M10/6556H01M10/6568H01M10/657F25D17/02F25D29/00F25D31/00
CPCH01M10/613H01M10/627H01M10/633H01M10/6556H01M10/6568H01M10/6554H01M10/657F25D31/005F25D17/02F25D29/00
Inventor 崔鹏飞关胜利吕丰硕刘佳威耿曼
Owner GUANGZHOU GOALAND ENERGY CONSERVATION TECH