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CN-224217359-U - Cooling system for capacitor pool assembly

CN224217359UCN 224217359 UCN224217359 UCN 224217359UCN-224217359-U

Abstract

The utility model discloses a cooling system of a capacitor pool assembly, which comprises two groups of capacitor pools, a heat exchanger and a cooling fan, wherein the two groups of capacitor pools are installed back to back, the two groups of capacitor pools are fixedly connected through a connecting plate, a sealing air duct with a certain thickness is formed between the two groups of capacitor pools in the connecting ring direction, the heat exchanger and the cooling fan are installed at the bottom of each capacitor pool, the heat exchanger is connected with the sealing air duct, the cooling fan sends air flow after heat exchange of the heat exchanger to the internal environment of a power cabinet, or the cooling fan sends air flow in the internal environment of the power cabinet to the heat exchanger for heat exchange, a plurality of power modules are installed on the outer side surfaces of the two groups of capacitor pools, a plurality of first openings are formed in the outer side walls of the capacitor pools between the power modules, and a plurality of second openings are formed in the two opposite side surfaces of the two groups of capacitor pools.

Inventors

  • YAN ZHONGQING
  • REN ZHIQIANG
  • ZHANG JITONG

Assignees

  • 天津瑞源电气有限公司

Dates

Publication Date
20260508
Application Date
20250528

Claims (5)

  1. 1. The cooling system for the capacitor pool assembly is characterized by comprising two groups of capacitor pools, a heat exchanger and a cooling fan, wherein the capacitor pools are arranged back to back, the two groups of capacitor pools are fixedly connected through a connecting plate, a sealing air channel with a certain thickness is formed between the two groups of capacitor pools in the connecting ring direction, the heat exchanger and the cooling fan are arranged at the bottom of the capacitor pools, the heat exchanger is connected with the sealing air channel, and the cooling fan sends air flow after heat exchange of the heat exchanger to the internal environment of a power cabinet, or the cooling fan sends air flow in the internal environment of the power cabinet to the heat exchanger for heat exchange; the two groups of the outer side surfaces of the capacitor cells are provided with a plurality of power modules, the outer side wall of the capacitor cell between the power modules is provided with a plurality of first openings, and the two opposite side surfaces of the capacitor cell are provided with a plurality of second openings.
  2. 2. The cooling system of the capacitor pool assembly of claim 1, wherein a plurality of rows of capacitors are arranged in the capacitor pool, the capacitors in the plurality of rows are connected in parallel through stacking, at least one surface of the side edge of the capacitor pool is of an open structure, and air flow gaps are formed between the capacitors of the open structure.
  3. 3. The cooling system of the capacitor pool assembly of claim 1, wherein a plurality of rows of capacitors are arranged in the capacitor pool, the capacitors are connected in parallel through stacking, the capacitors Chi Cebian are all of an open structure, and air flow gaps are formed between the capacitors of the open structure.
  4. 4. The capacitive cell assembly cooling system of claim 1, wherein said first and second openings are shaped in a regular pattern or an irregular pattern.
  5. 5. The cooling system of a capacitor bank assembly of claim 1, wherein the cooling fan is a centrifugal fan or an axial fan.

Description

Cooling system for capacitor pool assembly Technical Field The utility model belongs to the technical field of cooling heat exchange, and particularly relates to a cooling system of a capacitor pool assembly. Background The direct current bus capacitor in the wind power converter power cabinet is usually formed by connecting a plurality of capacitors in parallel to form a capacitor pool, and the power module is connected with the capacitor pool through bus stacking. The capacitor can generate loss and heat in the working and running processes, and needs to be cooled. The existing cooling mode is that a plurality of capacitors are tiled and stacked, air inlets and air outlets are formed in two ends of a capacitor pool, an air-water heat exchanger and a centrifugal fan are arranged at the bottom of the capacitor pool, cooling air is sucked from one end of the capacitor pool, flows into a gap between the capacitors to exchange heat with a capacitor shell, and hot air is discharged after being cooled by the heat exchanger, so that cooling air circulation is realized. In the mode, the cooling air sequentially passes through the stacked capacitors, so that the temperature of the air is gradually increased and accumulated, the temperature of the capacitors in the rear row is overhigh, and particularly when the high-power converter and the ultra-high-power converter are applied, the heat accumulation effect is more obvious due to the fact that the number of the capacitors is very large, and the service life of the capacitors is directly influenced by the temperature of the capacitors. Therefore, the heat dissipation design of the capacitor in the capacitor cell is a critical issue to be solved by the skilled person. Disclosure of utility model The utility model adopts the following technical scheme to realize the utility model: The cooling system of the capacitor pool assembly comprises two groups of capacitor pools which are arranged back to back, a heat exchanger and a cooling fan, wherein the two groups of capacitor pools are fixedly connected through a connecting plate, so that a sealing air channel with a certain thickness is formed between the two groups of capacitor pools in the upper direction of a connecting ring, the heat exchanger and the cooling fan are arranged at the bottom of the capacitor pools, the heat exchanger is connected with the sealing air channel, and the cooling fan sends air flow after heat exchange of the heat exchanger to the internal environment of a power cabinet, or the cooling fan sends air flow in the internal environment of the power cabinet to the heat exchanger for heat exchange; the two groups of the outer side surfaces of the capacitor cells are provided with a plurality of power modules, the outer side wall of the capacitor cell between the power modules is provided with a plurality of first openings, and the two opposite side surfaces of the capacitor cell are provided with a plurality of second openings. Furthermore, a plurality of rows of capacitors are arranged in the capacitor pool, the capacitors in the plurality of rows are connected in parallel through stacking, at least one surface of the side edge of the capacitor pool is of an open structure, and an airflow gap is formed between the capacitors of the open structure. Furthermore, a plurality of rows of capacitors are arranged in the capacitor pool, the capacitors are connected in parallel through stacking, the capacitors Chi Cebian are all of an open structure, and an air flow gap is formed between the capacitors of the open structure. Further, the first opening and the second opening are shaped in a regular pattern or an irregular pattern. The cooling fan is a centrifugal fan or an axial flow fan. The beneficial technical effects of the utility model are as follows: According to the utility model, through optimizing the structure of the heat dissipation air duct of the capacitor pool, the parallel uniformity of the air inlet and outlet of each parallel capacitor is realized, the air temperature around each capacitor is the same, the heat accumulation effect is eliminated, the temperature of each capacitor is relatively uniform, the use temperature of the capacitor is reduced, and the reliability of the product is improved. Drawings FIG. 1 is a schematic diagram of a cooling system for a capacitive pond assembly according to an embodiment of the present utility model; FIG. 2 is a longitudinal cross-sectional view of a cooling system for a capacitive pond assembly according to an embodiment of the present utility model; FIG. 3 is a side view of a cooling system for a capacitive pond assembly according to an embodiment of the present utility model; FIG. 4 is a schematic diagram of a capacitor cell structure of a cooling system for a capacitor cell assembly according to an embodiment of the present utility model; Fig. 5 is a schematic diagram of the azimuth structure of a capacitor Chi Lingyi of a cooling system of a c