CN-121993537-A - Corner type damping device of suspension type converter valve and design method

CN121993537ACN 121993537 ACN121993537 ACN 121993537ACN-121993537-A

Abstract

The invention provides a suspension type converter valve corner type damping device and a design method, wherein the suspension type converter valve corner type damping device comprises at least two groups of angular displacement type dampers which are respectively arranged at corner positions of top corner points of a suspension mechanism at the top of a converter valve, two ends of each angular displacement type damper are respectively connected with a top steel structure of a converter valve hall and an upper flange of the suspension mechanism, the angular displacement type dampers are distributed at the corner positions of the top corner points of the suspension mechanism, the original equipment structure of the suspension type converter valve is not changed, normal operation of equipment and inspection operation of a trolley below the converter valve are not influenced, process layout in the valve hall is not damaged, other adjacent electric facilities are not interfered, and strong engineering feasibility is achieved.

Inventors

LIN SEN
LIU ZHENLIN
MENG XIANZHENG
SUN YUHAN
LU ZHICHENG

Assignees

国网电力工程研究院有限公司
中国电力科学研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (11)

1. The corner type damping device of the suspension type converter valve is characterized by comprising at least two groups of angular displacement type dampers (3) which are respectively arranged at corner positions of top corners of a suspension mechanism (2) at the top of the converter valve (1); and two ends of the angular displacement type shock absorber (3) are respectively connected with a top steel structure (4) of the converter valve hall and an upper flange of the suspension mechanism (2).
2. A suspension converter valve corner damping device according to claim 1, characterized in that the number of corner-displacement dampers (3) in each group of said corner-displacement dampers (3) is two, and that two of said corner-displacement dampers (3) are arranged horizontally and orthogonally.
3. A suspension converter valve corner damping device according to claim 1, characterized in that the number of groups of angular displacement dampers (3) is the same as the number of top corner points of the suspension mechanism (2).
4. A suspension converter valve corner shock absorbing device according to claim 1, wherein the angular displacement shock absorber (3) comprises a middle arc-shaped connecting plate (3-1), two arc-shaped connecting side plates (3-2) respectively arranged at two sides of the middle arc-shaped connecting plate (3-1), and a viscoelastic energy dissipation layer (3-3) arranged between the middle arc-shaped connecting plate (3-1) and the middle arc-shaped connecting plate (3-1).
5. A suspension converter valve corner type damping device according to claim 4, wherein the middle arc type connecting plate (3-1) and the arc type connecting side plate (3-2) are arc plates with the same radius and the same radian.
6. A suspension converter valve corner shock absorber according to claim 4, wherein the middle arc connecting plate (3-1) and the arc connecting side plate (3-2) are arranged in parallel and have circumferential dislocation.
7. A suspension converter valve corner shock absorbing device according to claim 4, characterized in that the center of the arc connecting plate (3-1) and the center of the arc connecting sideboard (3-2) overlap, and the overlapping center overlaps the hinge point of the suspension mechanism (2) on the top steel structure (4).
8. The design method of the corner type damping device of the suspension type converter valve is characterized by comprising the following steps of: determining an initial yield force and an initial damping coefficient of an angular displacement type shock absorber (3) in a shock absorbing device based on the dead weight and the natural frequency of the converter valve (1); Determining an initial model of the angular displacement shock absorber (3) and mechanical parameters corresponding to the initial model according to the initial yield force and the initial damping coefficient; Inputting mechanical parameters corresponding to the initial model into a pre-constructed finite element simulation model of a converter valve damping structure, and performing simulation calculation under the earthquake motion time course to obtain a damping result of the initial model; Judging whether the damping result of the initial model meets the set damping requirement, if yes, outputting the initial model to complete the design of the damping device, and if not, re-selecting the model of the angular displacement type damper (3) according to the damping result of the initial model until the selected angular displacement type damper (3) meets the set damping requirement to complete the design of the damping device; The finite element simulation model of the converter valve damping structure is constructed according to the installation and connection structure of the converter valve and the damping device, and the damping device adopts the damping device as set forth in any one of claims 1-6.
9. A method of designing a suspension converter valve corner damper according to claim 8, characterized in that the sum of the initial yield forces of all the angular displacement dampers (3) in the damper is 1/2-4/5 of the dead weight of the converter valve.
10. The method of designing a corner-type damping device for a suspension type converter valve according to claim 8, wherein the initial damping coefficient is determined according to the following formula: c=mω n ξ/2; Wherein c is an initial damping coefficient, m is the dead weight of the converter valve, omega n is the natural frequency of the converter valve, xi is the damping ratio of the damping structure of the converter valve, and the damping ratio of the damping structure of the converter valve is in the range of 0.03-0.08.
11. A design method of a suspension type converter valve corner type damping device according to claim 8, wherein the determining mechanical parameters corresponding to the initial model and the initial model of the angular displacement type damper (3) according to the initial yield force and the initial damping coefficient includes: determining initial mechanical parameters of the angular displacement shock absorber (3) according to an approximate calculation formula of the initial damping coefficient; Determining an initial model of the angular displacement shock absorber and mechanical parameters corresponding to the initial model according to the initial yield force and the initial mechanical parameters; Wherein the approximate calculation formula is expressed as: wherein c is an initial damping coefficient, G' is a shear loss modulus, A is a shear area of the viscoelastic energy dissipation layer (3-3), tg is a field characteristic period, and h is a thickness of the viscoelastic energy dissipation layer (3-3).

Description

Corner type damping device of suspension type converter valve and design method Technical Field The invention belongs to the technical field of seismic resistance of electric power facilities, and particularly relates to a corner type damping device of a suspension type converter valve and a design method. Background The converter valve is one of the most important electrical equipment in a converter station, is used for realizing alternating current-direct current and direct current-alternating current conversion, and has the core functions of rectification, inversion and the like. The conventional extra-high voltage direct current power transmission and transformation engineering adopts a suspension type converter valve, and because of adopting a suspension structure mode, the self-vibration period of equipment is longer, the displacement is larger under the action of earthquake, the displacement of a valve tower easily exceeds the design limit value, other important equipment (such as converter transformer) interconnected with the valve tower is pulled, and the interaction force between the equipment can cause the damage of the converter valve and the interconnection equipment thereof in severe cases. Due to regional terrain limitations, many converter stations and substations are inevitably built in strong seismic areas, facing a significant risk of earthquake disasters. The damage condition of electric facilities in the medium-rise earthquake is serious, and the earthquake relief and social life are seriously affected besides huge economic loss. In the prior art, in order to cope with the large displacement possibly generated by the suspension converter valve in a high-intensity area, a series of measures are taken for the installation of the suspension converter valve, such as applying spring damping devices to the bottom and the top of the suspension converter valve as limiting measures, arranging a spring stay rope device at the bottom of the device to limit the horizontal displacement of a valve tower, and using a tension insulator and a spring-damper connecting piece to pull the bottom of the valve tower and the ground firmly so as to realize the technical scheme of controlling the displacement of the converter valve. That is, the existing suspension type converter valve damping device mainly adopts a suspension spring damping device arranged at the top of the valve tower or a damping device arranged between the bottom of the valve tower and the ground, however, the existing technical scheme cannot be applied in actual engineering. The main reason is that the suspension spring damping device is arranged at the top of the valve tower to increase the height of the valve hall and change the structural design of the valve hall, and the mode of the ground tie shock absorber occupies the space of the valve hall too much, so that other nearby electric facilities are easily affected by interference, and in addition, the inspection of equipment by the inspection trolley in the valve hall is also affected. Therefore, aiming at the problems in the prior art, how to effectively control the earthquake displacement of the converter valve is a technical problem to be solved under the premise of not changing the structural design of the valve hall and the converter valve and not affecting the electrical function and operation maintenance of the equipment in normal operation and not interfering with other adjacent electric facilities. Disclosure of Invention In order to overcome the defect of overlarge interference influence of the damping structure in the prior art, the invention provides a corner type damping device of a suspension type converter valve, which comprises at least two groups of angular displacement type dampers respectively arranged at corner positions of top corner points of a suspension mechanism at the top of the converter valve; And two ends of the angular displacement type shock absorber are respectively connected with the top steel structure of the converter valve hall and the upper flange of the suspension mechanism. Preferably, the number of the internal angle displacement type shock absorbers in each group of the angle displacement type shock absorbers is two, and the two angle displacement type shock absorbers are horizontally and orthogonally distributed. Preferably, the number of groups of the angular displacement dampers is the same as the number of top corner points of the suspension mechanism. Preferably, the angular displacement type shock absorber comprises a middle arc-shaped connecting plate, two arc-shaped connecting side plates which are respectively arranged at two sides of the middle arc-shaped connecting plate, and a viscoelastic energy dissipation layer which is arranged between the middle arc-shaped connecting plate and the middle arc-shaped connecting plate. Preferably, the middle arc-shaped connecting plate and the arc-shaped connecting side plates are arc-shaped plates