CN-120749440-B - Configuration device and method suitable for wind power grounding in complex mountain land

CN120749440BCN 120749440 BCN120749440 BCN 120749440BCN-120749440-B

Abstract

The invention belongs to the technical field of wind power grounding configuration, in particular to a configuration device and a method suitable for wind power grounding in a complex mountain area, wherein the configuration device comprises an inner ring grounding grid, an outer ring grounding grid and a vertical grounding electrode assembly; the electric-resistance-reducing grounding electrode comprises an inner ring grounding grid, an outer ring grounding grid, a conductive strip, a welding seat, an electrode column and a supporting cover, wherein the conductive strip is arranged between adjacent vertical grounding electrode assemblies of the inner ring grounding grid and the outer ring grounding grid, the vertical grounding electrode assemblies comprise the welding seat, the electrode column is fixedly connected to the lower side of the welding seat, the supporting cover is arranged on the outer side of the electrode column, and resistance-reducing materials are filled between the supporting cover and the electrode column. Through setting up the perpendicular earthing pole subassembly that inner circle ground net, outer lane ground net and array distribute, can be with tower section of thick bamboo electric current quick leading-in earth, utilize the resistance-reducing material can reduce the earth resistance by a wide margin, it is less by the influence of geological motion, biological activity or humidity change after the construction, can keep high-efficient laminating contact state with the electrode column for a long time, extension earthing device's life.

Inventors

HUO YANHONG
CHEN XIN
LI WENQING
Meng Yaqiang
CHEN KAI
Xue Bozhi
TANG WEICHAO
GUO XIAOLEI
MA QIQI
YANG FEIFEI
YANG JIANGPING
YANG BINGYAO

Assignees

中国水利水电第六工程局有限公司

Dates

Publication Date: 20260508
Application Date: 20250806

Claims (5)

1. The configuration device suitable for the wind power grounding of the complex mountain is characterized by comprising an inner ring grounding grid (1), an outer ring grounding grid (2) and a vertical grounding electrode assembly; the inner ring grounding grid (1) and the outer ring grounding grid (2) are concentrically arranged around the wind power tower, the vertical grounding electrode assemblies are provided with a group and are uniformly distributed on the surfaces of the inner ring grounding grid (1) and the outer ring grounding grid (2), and conductive strips (3) are arranged between adjacent vertical grounding electrode assemblies of the inner ring grounding grid (1) and the outer ring grounding grid (2); The vertical grounding electrode assembly is used for leading the current of the wind power tower to the ground and comprises a welding seat (4), an electrode column (5) and a supporting cover (6); The welding seat (4) is used for welding with the inner ring grounding grid (1), the outer ring grounding grid (2) and the conducting strips (3), an electrode column (5) is fixedly connected to the lower side of the welding seat (4), a supporting cover (6) is arranged on the outer side of the electrode column (5), the supporting cover (6) is in a net-shaped design, and resistance reducing materials are filled between the supporting cover (6) and the electrode column (5); A group of annular pipes (7) are uniformly distributed on the inner side of the supporting cover (6), adjacent annular pipes (7) are mutually communicated through a group of connecting pipes (8), a group of water outlets (9) are uniformly distributed on the inner side of the annular pipes (7), a group of water reservoirs (10) are uniformly distributed on the outer side of the outer ring grounding grid (2), a water diversion pipe (11) is communicated between the water reservoirs (10) and one annular pipe (7) on the top, and a conductive anti-corrosion coating is coated on the surface of the electrode column (5); The water diversion pipe (11) is provided with an electromagnetic valve (12), the surface of the electrode column (5) is provided with a humidity sensor (13), and the humidity sensor (13) is connected with the electromagnetic valve (12) through a PLC control system; the water outlet (9) is internally provided with a fixed plate (14) and a sealing block (15), the fixed plate (14) is in a net-shaped design, the surface of the sealing block (15) is fixedly connected with a connecting block (16), a driving piece (17) is fixedly connected between the connecting block (16) and the fixed plate (14), and the driving piece (17) is made of a water-absorbing expansion material; a mounting plate (21) is fixedly connected in the top of the reservoir (10), a water collecting tank (22) is arranged in the middle of the mounting plate (21), and a filter screen (23) is fixedly connected in the water collecting tank (22); A pair of collecting rollers (24) are rotatably connected to the inside of two sides of the mounting plate (21), a coil spring is arranged between the collecting rollers (24) and the mounting plate (21), waterproof cloth (25) is wound between the collecting rollers (24), and the waterproof cloth (25) is attached to the lower side of the water collecting tank (22).
2. The configuration device suitable for wind power grounding in the complicated mountain area is characterized in that a pair of sliding rails (18) are arranged on the inner wall surface of a water outlet (9), clamping blocks (19) are connected inside the sliding rails (18) in a sliding mode, the clamping blocks (19) are attached to the surface of a connecting block (16), springs are fixedly connected between the clamping blocks (19) and the sliding rails (18), and a pair of clamping grooves (20) are formed in the surface of the connecting block (16).
3. The configuration device suitable for wind power grounding in the complicated mountain land is characterized in that a guide block (26) is fixedly connected to the mounting plate (21) at a position corresponding to the storage roller (24), a guide groove (27) is formed in the guide block (26), waterproof cloth (25) penetrates through the guide groove (27), a group of elastic tooth blocks I (28) are uniformly distributed at the bottom of the guide groove (27), and a group of elastic tooth blocks II (29) are uniformly distributed at the position corresponding to the guide block (26) on the lower side of the waterproof cloth (25).
4. The configuration method suitable for the wind power grounding of the complex mountain area is characterized by comprising the following steps of: S1, digging surface soil around a wind turbine generator, digging and building a reservoir (10) at a position outside the wind turbine generator 10m, and performing water seepage prevention treatment on the reservoir (10); s2, drilling a plurality of mounting holes through drilling equipment, sequentially placing the support cover (6) and the electrode column (5) into the mounting holes, and arranging a water diversion pipe (11) between the reservoir (10) and the annular pipe (7) of the support cover (6); s3, mixing and stirring the resistance reducing material and water, pouring the mixture into an annular gap between the supporting cover (6) and the electrode column (5), and pouring the mixture in a layered manner and vibrating the mixture for compaction; And S4, after the resistance reducing material is stable in structure, welding the welding seat (4) with the inner ring grounding grid (1), the outer ring grounding grid (2) and the conducting strips (3) respectively in an exothermic welding mode, and backfilling surface soil.
5. The configuration method for wind power grounding in complex mountain areas according to claim 4, further comprising the steps of: S5, monitoring the periphery of the electrode column (5) in real time through a humidity sensor (13), opening an electromagnetic valve (12) through a PLC control system if the moisture content is reduced to a trigger threshold value, and enabling rainwater in a reservoir (10) to enter the annular pipe (7) through a water conduit (11); S6, a driving piece (17) in the water outlet (9) absorbs water to expand after meeting water, and pushes the connecting block (16) and the sealing block (15) to move outwards, so that the water outlet (9) is automatically opened; and S7, water flow in the annular pipe (7) enters the resistance reducing material through the water outlet (9) and diffuses to the periphery, so that the resistance reducing material is supplemented with water, a wet state is maintained, and good conductive property is ensured.

Description

Configuration device and method suitable for wind power grounding in complex mountain land Technical Field The invention belongs to the technical field of wind power grounding configuration, and particularly relates to a configuration device and method suitable for wind power grounding in a complex mountain area. Background With the wide application of renewable energy sources, wind power generation is taken as one of important clean energy sources, and the construction of the wind power generation gradually expands to the complicated mountain terrain. These mountainous regions have complex geographical and climatic conditions that make the installation and operation of wind power plants a unique set of challenges, particularly in the design and implementation of grounding systems. Because the mountain region is in the environment with severe geological conditions, the surface soil is shallow and loose and has small water content, and the inner layer is mostly broken harder rock, so that the grounding resistance is higher and the implementation work is more difficult. One patent of China patent application CN117013325A discloses a configuration method suitable for wind power grounding in complex mountain areas, which has the technical scheme that project grounding resistivity is divided, different materials are selected for different grounding resistivity to form a standardized material library and a standardized collection bill, a standardized configuration calculation flow is established, the thermal stability of the selected grounding body and grounding wire is checked, the material and the sectional area of a zero-connection conductor are determined, and the capacity of protective equipment is checked, so that the grounding configuration is more accurate. However, when the wind power grounding device in the prior art is used, because of the geographical features of mountain areas and complex and changeable soil environment, the soil condition of the grounding electrode after construction can be changed due to geological movement, biological activity or humidity influence, and further uneven contact phenomenon is generated due to gaps and cracks between the electrode and rock soil, so that the soil resistivity is abnormally increased, lightning stroke or fault current cannot be effectively discharged, misoperation of a fan control system and machine unit shutdown are caused, precision equipment such as a converter is damaged due to heavy weight, potential gradient is easily formed by uneven soil structure, dangerous step voltage can be generated, the safety of inspection personnel is threatened, and in addition, the potential difference between a pole tower and a circuit is increased due to high-impedance grounding, the electrochemical corrosion of metal components is accelerated, and the service life of the equipment is shortened. Therefore, the invention provides a configuration device and method suitable for wind power grounding in complex mountain areas. Disclosure of Invention In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved. The invention solves the technical problems by adopting the technical scheme that the configuration device suitable for wind power grounding in complex mountain areas comprises an inner ring grounding grid, an outer ring grounding grid and a vertical grounding electrode assembly; The inner ring grounding grid and the outer ring grounding grid are concentrically arranged around the wind power tower, the vertical grounding electrode assemblies are uniformly distributed on the surfaces of the inner ring grounding grid and the outer ring grounding grid, and conductive strips are arranged between adjacent vertical grounding electrode assemblies of the inner ring grounding grid and the outer ring grounding grid; The vertical grounding electrode assembly is used for leading the current of the wind power tower cylinder into the ground, and comprises a welding seat, an electrode column and a supporting cover; The welding seat is used for welding the inner ring grounding grid, the outer ring grounding grid and the conductive strips, an electrode column is fixedly connected to the lower side of the welding seat, a supporting cover is arranged on the outer side of the electrode column, the supporting cover is in a net-shaped design, and resistance reducing materials are filled between the supporting cover and the electrode column. Preferably, a group of annular pipes are uniformly distributed on the inner side of the supporting cover; the adjacent annular pipes are mutually communicated through a group of connecting pipes, a group of water outlets are uniformly distributed on the inner sides of the annular pipes, a group of water reservoirs are uniformly distributed on the outer sides of the outer ring grounding grid, a water diversion pipe is communicated between the water reservoirs and one annular pipe on th