Excitation system alternating current and direct current incoming and outgoing line sealing bus ventilation system

Abstract

The utility model relates to an excitation system AC / DC incoming and outgoing line sealing bus ventilation system, which comprises a first ventilation pipe and a second ventilation pipe which are respectively arranged at the tops of two excitation system rectifier cabinets, the other end of the first ventilation pipe and the other end of the second ventilation pipe are communicated with an alternating-current bus inlet pipeline above the alternating-current bus inlet cabinet and a direct-current bus outlet pipeline above the direct-current bus outlet cabinet respectively. The alternating current bus inlet pipeline is communicated with the excitation system rectifier cabinet through the first ventilation pipe, the direct current bus outlet pipeline is communicated with the excitation system rectifier cabinet through the second ventilation pipe, and hot air in the excitation system rectifier cabinet is sent into the alternating current bus inlet pipeline and the direct current bus outlet pipeline through an axial flow fan of the excitation system rectifier cabinet. The air between the indoor parts and the outdoor parts of the alternating-current bus inlet pipeline and the direct-current bus outlet pipeline is circulated, heat exchange is achieved, and therefore the temperature difference is reduced, and the risk that the interior of the alternating-current bus inlet pipeline and the interior of the direct-current bus outlet pipeline are dewed at the wall penetrating positions is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to an AC / DC inlet and outlet line sealing and ventilation system for an excitation system. Background Art

[0002] Thermal power plants experience hot weather in the summer, and the equipment in the plant dissipates a large amount of heat, resulting in a high ambient temperature outside the excitation chamber. However, the air-conditioning temperature inside the excitation chamber is low because the excitation system needs to operate under low temperature conditions. As a result, the temperature difference between the indoor and outdoor parts of the excitation chamber is too large. In addition, since axial fans cannot be installed in the AC bus incoming cabinet and the DC bus outgoing cabinet, the internal air of the indoor and outdoor parts of the sealed AC bus incoming duct and DC bus outgoing duct cannot circulate, resulting in condensation on the inner wall of the AC bus incoming duct and the DC bus outgoing duct where they pass through the wall. This makes the inside of the AC bus incoming duct and the DC bus outgoing duct moist at the wall-penetrating part, resulting in too low phase-to-phase insulation inside the sealed busbar, which is prone to short-circuit faults. In addition, after condensation, it takes a lot of time to heat and dehumidify to improve the insulation value. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an AC and DC inlet and outlet wire sealing and ventilation system for an excitation system, so as to overcome the deficiencies in the above-mentioned prior art.

[0004] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a ventilation system for AC and DC input and output lines of an excitation system, comprising ventilation duct one and ventilation duct two respectively arranged on the tops of two rectifier cabinets of the excitation system, the other ends of ventilation duct one and ventilation duct two being respectively connected to the AC bus input pipe above the AC bus input cabinet and the DC bus output pipe above the DC bus output cabinet.

[0005] The beneficial effects of the utility model are as follows: the AC bus inlet pipe is connected to the excitation system rectifier cabinet through the ventilation pipe one, and the DC bus outlet pipe is connected to the excitation system rectifier cabinet through the ventilation pipe two, and the axial flow fan provided in the excitation system rectifier cabinet is used to send the hot air in the excitation system rectifier cabinet into the AC bus inlet pipe and the DC bus outlet pipe, so that the air between the indoor part and the outdoor part of the AC bus inlet pipe and the DC bus outlet pipe can circulate, realizing heat exchange, thereby reducing the temperature difference and reducing the risk of condensation in the wall-penetrating parts of the AC bus inlet pipe and the DC bus outlet pipe.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, ventilation holes are provided on the outside of the wall of the excitation chamber for the AC busbar inlet pipe and the DC busbar outlet pipe.

[0008] Furthermore, swirl fan blades are provided at the ventilation opening.

[0009] Furthermore, a mounting tube is provided at the vent, the mounting tube is sealed and plugged into the vent, and the swirl fan blades are provided in the mounting tube.

[0010] Furthermore, an air filter element is arranged in the mounting tube.

[0011] Furthermore, the AC busbar incoming line pipe and the DC busbar outgoing line pipe are provided with an insulation layer at the wall penetration location. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 For this utility model Figure 1 A magnified view of the structure at center A;

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0015] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0016] 1. Excitation system rectifier cabinet; 2. Ventilation duct 1; 3. Ventilation duct 2; 4. AC busbar incoming cabinet; 5. DC busbar outgoing cabinet; 6. AC busbar incoming duct; 7. DC busbar outgoing duct; 8. Excitation chamber; 9. Ventilation port; 10. Swirl fan blades; 11. Mounting pipe; 12. Air filter element; 13. Insulation layer. DETAILED DESCRIPTION

[0017] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0018] like Figures 1 to 3 As shown, Example 1, an excitation system AC and DC inlet and outlet sealed mother ventilation system, includes ventilation pipe 1 2 and ventilation pipe 2 3 respectively arranged on the top of two excitation system rectifier cabinets 1, and the other ends of ventilation pipe 1 2 and ventilation pipe 2 3 are respectively connected to the AC bus inlet pipe 6 above the AC bus inlet cabinet 4 and the DC bus outlet pipe 7 above the DC bus outlet cabinet 5.

[0019] The AC bus inlet pipe 6 is connected to the excitation system rectifier cabinet 1 through the ventilation pipe 1 2, and the DC bus outlet pipe 7 is connected to the excitation system rectifier cabinet 1 through the ventilation pipe 2 3. The axial flow fan provided by the excitation system rectifier cabinet 1 is used to send the hot air in the excitation system rectifier cabinet 1 into the AC bus inlet pipe 6 and the DC bus outlet pipe 7. This allows air to circulate between the indoor and outdoor parts of the AC bus inlet pipe 6 and the DC bus outlet pipe 7, achieving heat exchange, thereby reducing the temperature difference and reducing the risk of condensation in the AC bus inlet pipe 6 and the DC bus outlet pipe 7 at the wall penetration part;

[0020] In a specific implementation, the hot air in the rectifier cabinet 1 of the excitation system is generated by the heat generated during the operation of the equipment in the cabinet.

[0021] Example 2: This example is a further improvement on Example 1, and its details are as follows:

[0022] The AC busbar inlet pipe 6 and the DC busbar outlet pipe 7 are both provided with vents 9 on the outside of the wall of the excitation chamber 8. The vents 9 allow the cold air inside the excitation chamber 8 to exchange heat with the hot air outside, which can further reduce the risk of condensation.

[0023] Example 3: This example is a further improvement on Example 2, and its details are as follows:

[0024] The vents 9 are provided with swirl fan blades 10. The swirl fan blades 10 can swirl and mix the cold air with the hot air outside, effectively preventing condensation. The swirl fan blades 10 do not require additional power drive and can be driven only by the wind generated by the axial flow fan inside the rectifier cabinet 1 of the excitation system.

[0025] Example 4: This example is a further improvement on Example 3, and its details are as follows:

[0026] The vent 9 is provided with a mounting tube 11, which is sealed and plugged into the vent 9, and the swirl fan blade 10 is arranged in the mounting tube 11. In order to facilitate the installation of the swirl fan blade 10.

[0027] Example 5: This example is a further improvement on Example 4, and its details are as follows:

[0028] An air filter element 12 is provided in the mounting tube 11. The air filter element 12 can play a dustproof role, preventing dust in the air from entering the AC busbar inlet pipe or the DC busbar outlet pipe.

[0029] Example 6: This example is a further improvement based on any one of Examples 1 to 5, and its details are as follows:

[0030] The AC busbar incoming line pipe 6 and the DC busbar outgoing line pipe 7 are located at the wall penetration point and are sheathed with an insulation layer 13. The insulation layer 13 can insulate the wall penetration point of the AC busbar incoming line pipe 6 and the DC busbar outgoing line pipe 7, and has a better anti-condensation effect.

[0031] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An excitation system AC and DC inlet and outlet line sealing and ventilation system, characterized in that: The invention comprises a ventilation pipe 1 (2) and a ventilation pipe 2 (3) respectively arranged on the top of two excitation system rectifier cabinets (1); the other ends of the ventilation pipe 1 (2) and the ventilation pipe 2 (3) are respectively connected to an AC bus incoming line pipeline (6) above an AC bus incoming line cabinet (4) and a DC bus outgoing line pipeline (7) above a DC bus outgoing line cabinet (5).

2. The AC / DC inlet and outlet sealing ventilation system of the excitation system according to claim 1 is characterized in that: The AC busbar inlet pipe (6) and the DC busbar outlet pipe (7) are both provided with ventilation holes (9) on the outside of the wall of the excitation chamber (8).

3. The AC / DC inlet and outlet sealing ventilation system of the excitation system according to claim 2 is characterized in that: The ventilation opening (9) is provided with swirl fan blades (10).

4. The AC / DC inlet and outlet sealing ventilation system of the excitation system according to claim 3 is characterized in that: A mounting tube (11) is provided at the vent (9), the mounting tube (11) is sealed and plugged into the vent (9), and the swirl fan blade (10) is provided in the mounting tube (11).

5. The AC / DC inlet and outlet sealing ventilation system of the excitation system according to claim 4 is characterized in that: An air filter element (12) is arranged in the installation tube (11).

6. An excitation system AC / DC inlet and outlet wire sealing and ventilation system according to any one of claims 1 to 5, characterized in that: The AC busbar inlet pipe (6) and the DC busbar outlet pipe (7) are provided with a thermal insulation layer (13) at the wall penetration portion.

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