High-power direct-current grounding resistor for flexible direct-current transmission

Abstract

The utility model discloses a high-power direct-current grounding resistor for flexible direct-current transmission, which relates to the field of grounding resistors and comprises a lower-end fixing plate, an insulating structure and an upper-end fixing plate, the insulating structure is fixedly connected to the top end of the lower-end fixing plate, the upper-end fixing plate is fixed to the top end of the insulating structure, the insulating structure is longitudinally stacked, and the upper-end fixing plate is fixed to the top end of the insulating structure. The insulation structure comprises a copper sleeve, a plurality of groups of grounding rods, a lower insulation terminal, an upper insulation terminal, a heat dissipation plate and a grounding polar plate, the copper sleeve is sleeved and fixed outside the grounding rods, and the grounding rods are arranged. According to the grounding resistor, the overall heat dissipation efficiency is improved by utilizing the built-in stacked heat dissipation plates, meanwhile, the staggered grounding rods can be prevented from being crossed and contacted with one another, so that good contact and stability of the grounding wires are ensured, and the staggered design of the grounding rods is beneficial to balancing charge distribution and avoiding single-point overheating or damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of grounding resistor, concretely is a kind of for flexible direct current transmission high-power direct current grounding resistor. BACKGROUND

[0002] Flexible direct current transmission high-power direct current grounding resistor is a kind of grounding resistor specially designed for flexible direct current transmission system. It has the advantages of high resistance, high voltage, high power and small size, and can be applied to AC and DC systems.

[0003] The grounding rod design of the existing grounding resistor is mostly parallel placement. When placing the grounding rod, due to space limitation or improper operation, the grounding rods are prone to cross and touch each other, which not only affects the grounding effect, but also may cause safety hazards. In addition, the existing grounding resistor also has deficiencies in heat dissipation. In the case of long-time work or high-load operation, the grounding resistor will generate a large amount of heat. If the heat dissipation is poor, the temperature will rise, thereby affecting the performance and service life of the resistor. SUMMARY

[0004] The utility model aims at providing a kind of for flexible direct current transmission high-power direct current grounding resistor to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of for flexible direct current transmission high-power direct current grounding resistor, including lower end fixed plate, insulating structure and upper end fixed plate, the insulating structure is fixedly connected at the top of the lower end fixed plate, the upper end fixed plate is fixed at the top of the insulating structure, and the insulating structure is designed longitudinally stacked.

[0006] Preferably, the insulating structure includes copper sleeve, grounding rod, lower insulating terminal, upper insulating terminal, heat sink and grounding electrode plate, the copper sleeve is fixedly sleeved on the outside of the grounding rod, the grounding rod is provided with a plurality of groups, the upper insulating terminal is provided with a plurality of groups and is sleeved on the top outer wall of each group of grounding rod, the lower insulating terminal is provided with a plurality of groups and is sleeved on the bottom outer wall of each group of grounding rod, and the heat sink and the grounding electrode plate are provided with a plurality of groups and are fixedly stacked with each other.

[0007] Preferably, the heat sink is a multi-section bending structure, and a plurality of groups of the grounding rod are fixedly arranged in the concave part of the heat sink, and the grounding electrode plate is fixedly arranged on the outer wall of a plurality of groups of the grounding rod.

[0008] Preferably, the upper end fixed plate and the lower end fixed plate are of the same structure, the upper end fixed plate includes a fixed plate body and a fastening bolt, the top end of the grounding rod passes through the fixed plate body and is fixed with the fixed plate body by the fastening bolt.

[0009] Preferably, the several groups of the grounding rods are staggered with each other, and are fixedly connected with the lower end fixed plate and the upper end fixed plate by bolts.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The flexible high-power DC grounding resistor provided by the utility model utilizes the heat dissipation plate with built-in stacking design to improve the overall heat dissipation efficiency, and the staggered grounding rods can avoid mutual crossing and touching, thereby ensuring good contact and stability of the grounding wire, and the staggered grounding rods help to balance the charge distribution and avoid single-point overheating or damage. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further described below in combination with the drawings:

[0013] Figure 1 The utility model is used for flexible high-power DC grounding resistor Figure 1 ;

[0014] Figure 2 The utility model is used for flexible high-power DC grounding resistor Figure 2 ;

[0015] Figure 3 The utility model is used for flexible high-power DC grounding resistor

[0016] As shown in the drawings: 1, the lower end fixed plate; 2, the insulating structure; 21, the copper sleeve; 22, the grounding rod; 23, the lower insulating terminal; 24, the upper insulating terminal; 25, the heat dissipation plate; 26, the grounding electrode plate; 3, the upper end fixed plate; 31, the fixed plate main body; 32, the fastening bolt. DETAILED DESCRIPTION

[0017] In order to more clearly explain the overall concept of the utility model, the following will be described in detail in an exemplary manner in combination with the drawings.

[0018] It should be noted that in the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description, therefore, the protection scope of the utility model is not limited by the specific embodiments disclosed below.

[0019] In addition, in the description of the utility model, need understanding, the term "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and so on the orientation or positional relation indicated is based on the orientation or positional relation shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore can not be understood as limiting the utility model.

[0020] In the utility model, unless another explicit provision and limitation, the terms "mount", "connect", "connect", "fix" and so on the terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated, can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.But note that direct connection is to indicate that the connection of two main bodies does not pass through the connection relationship of excessive structure, and only through the transmission structure is connected to form a whole.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium.In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0022] Please refer to Figures 1 to 3 The utility model provides a kind of technical scheme: a kind of high-power DC grounding resistor for flexible DC power transmission, including lower end fixed plate 1, insulating structure 2 and upper end fixed plate 3, insulating structure 2 is fixedly connected in the top of lower end fixed plate 1, upper end fixed plate 3 is fixed in the top of insulating structure 2, and insulating structure 2 is longitudinal stack design;

[0023] The grounding resistor utilizes the heat sink 25 of built-in stack design to improve the overall heat dissipation efficiency, and the staggered design of the grounding rod 22 can avoid mutual crossing and touching, thereby ensuring good contact and stability of the grounding wire, and the staggered design of the grounding rod 22 helps to balance the charge distribution and avoid overheating or damage of a single point.

[0024] The insulation structure 2 comprises a copper sleeve 21, a grounding rod 22, a lower insulation terminal 23, an upper insulation terminal 24, a heat dissipation plate 25 and a grounding electrode plate 26, the copper sleeve 21 is sleeved and fixed outside the grounding rod 22, the grounding rod 22 is provided in several groups, the upper insulation terminal 24 is provided in several groups and is sleeved outside the top outer wall of each group of grounding rods 22, the lower insulation terminal 23 is provided in several groups and is sleeved outside the bottom outer wall of each group of grounding rods 22, the heat dissipation plate 25 and the grounding electrode plate 26 are provided in several groups and are fixed by stacking each other;

[0025] During installation, the cable can be connected to the upper end fixed plate 3 and fixed by using a cable clamp, the upper insulation terminal 24 and the lower insulation terminal 23 provide necessary electrical isolation and protection, ensure the stability and safety of the grounding system, the grounding electrode plate 26 is in direct contact with the soil and is responsible for tightly connecting the grounding resistor with the soil, thereby forming a complete electrical path and effectively guiding the current into the ground, ensuring the normal work of the grounding system, in the case of electrical failure or lightning strike, the grounding electrode plate 26 can quickly guide the current into the ground, avoiding damage to equipment and personnel;

[0026] The heat dissipation plate 25 is a multi-section bending structure, and the several groups of grounding rods 22 are respectively fixed in the inner recessed parts of the heat dissipation plate 25, and the grounding electrode plate 26 is fixed outside the outer wall of the several groups of grounding rods 22;

[0027] The stacking design between the multiple groups of heat dissipation plates 25 and the multiple groups of grounding electrode plates 26 can play a mutual supporting role, and the bending structure of the multiple groups of heat dissipation plates 25 enlarges the heat dissipation area, which can effectively discharge the heat generated when the current passes through the grounding electrode plate 26, if the grounding electrode plate 26 is not well cooled, the temperature will rise, thereby affecting the working efficiency and safety of the grounding electrode;

[0028] The several groups of grounding rods 22 are staggered with each other and are fixedly connected with the lower end fixed plate 1 and the upper end fixed plate 3 by using bolts;

[0029] The several groups of grounding rods 22 are fixed in the inner recessed parts of the heat dissipation plate 25, and the heat dissipation plate 25 plays a separating role for the grounding rods 22, and the staggered grounding rods 22 can avoid mutual crossing and touching, ensuring good contact and stability of the grounding wire;

[0030] The upper end fixed plate 3 has the same structure as the lower end fixed plate 1, and the upper end fixed plate 3 comprises a fixed plate main body 31 and a fastening bolt 32, and the top end of the grounding rod 22 penetrates through the fixed plate;

[0031] The bolt fixing mode well ensures the vertical placement of the insulation structure 2 and reduces the mutual extrusion caused by the pressure during placement in the soil.

[0032] It should be understood by those of ordinary skill in the art that the discussion of any of the above embodiments is merely exemplary and is not intended to suggest that the scope of the present application includes only these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in detail for the sake of brevity.

[0033] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications, equivalents, improvements and the like are intended to be encompassed by the present application.

Claims

1. A high-power DC grounding resistor for flexible HVDC transmission comprising a lower end fixing plate (1), an insulation structure (2) and an upper end fixing plate (3), characterized in that: The insulation structure (2) is fixedly connected to the top end of the lower end fixed plate (1), the upper end fixed plate (3) is fixed to the top end of the insulation structure (2), and the insulation structure (2) is designed in a longitudinal stacking mode.

2. A high power DC grounding resistor for flexible HVDC power transmission according to claim 1, characterized in that: The insulation structure (2) comprises copper sleeves (21), grounding rods (22), lower insulation terminals (23), upper insulation terminals (24), heat dissipation plates (25) and grounding electrode plates (26), the copper sleeves (21) are sleeved and fixed outside the grounding rods (22), the grounding rods (22) are provided in groups, the upper insulation terminals (24) are provided in groups and are sleeved outside the top end outer walls of each group of grounding rods (22), the lower insulation terminals (23) are provided in groups and are sleeved outside the bottom outer walls of each group of grounding rods (22), and the heat dissipation plates (25) and the grounding electrode plates (26) are provided in groups and are fixedly stacked with each other.

3. A high power DC grounding resistor for flexible HVDC power transmission according to claim 2, characterized in that: The heat dissipation plates (25) are multi-section bending structures, a plurality of groups of the grounding rods (22) are fixed to the inner concave portions of the heat dissipation plates (25), and the grounding electrode plates (26) are fixed to the outer walls of the plurality of groups of the grounding rods (22).

4. A high power DC grounding resistor for flexible HVDC power transmission according to claim 3, characterized in that: The upper end fixed plate (3) is the same in structure as the lower end fixed plate (1), the upper end fixed plate (3) comprises a fixed plate body (31) and fastening bolts (32), the top ends of the grounding rods (22) pass through the fixed plate body (31) and are fixed to the fixed plate body (31) by the fastening bolts (32).

5. A high power DC grounding resistor for flexible HVDC power transmission according to claim 4, characterized in that: The plurality of groups of the grounding rods (22) are staggered with each other and are fixedly connected to the lower end fixed plate (1) and the upper end fixed plate (3) by bolts.

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