Combined ice melting isolation switch with short circuit and isolation functions
By introducing a 35kV horizontal rotary disconnector into the de-icing disconnector, the problems of segmented de-icing of multiple wind farms' combined transmission lines and isolation of multiple de-icing power supplies were solved, achieving a compact, economical, and practical de-icing effect.
Patent Information
- Application Number
- CN202422860706.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-22
AI Technical Summary
The existing de-icing disconnect switches cannot meet the segmented de-icing requirements when multiple wind farms are connected to a single wind farm booster station via a combiner line for centralized power transmission, and they also cannot independently operate multiple de-icing power supplies to meet isolation requirements.
Design a combined de-icing disconnect switch, which includes a main de-icing disconnect switch and a 35kV horizontal rotary disconnect switch. By adding the 35kV horizontal rotary disconnect switch, short-circuiting and isolation functions are achieved, meeting various de-icing needs and power isolation requirements.
It enables segmented de-icing of the busbar and independent operation of multiple de-icing power supplies. It has a compact structure, saves investment, is easy to construct, and meets the needs of various de-icing scenarios.
Smart Images
Figure CN223665359U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of power equipment, especially relates to a combined ice-melting disconnecting switch with short-circuiting and isolating functions. BACKGROUND
[0002] The wind power plants in the north of Guangxi Zhuang Autonomous Region often have serious icing on the outgoing lines in winter. In order to eliminate the icing on the lines, an ice-melting system needs to be configured. The conventional ice-melting system mainly consists of an ice-melting power supply, an ice-melting disconnecting switch and lines that need to be ice-melted. When the ice-melting operation is performed on the lines, the end of the ice-melting disconnecting switch corresponding to the phase of the lines that need to be ice-melted is short-circuited to form a closed ice-melting loop.
[0003] The existing ice-melting disconnecting switch can meet the requirements of direct access to the system for a single wind farm. The conventional vertically telescopic ice-melting disconnecting switch has the upper end static contact side connected to the outgoing line and the lower end movable contact side connected to the 10kV ice-melting power supply. One set of the ice-melting disconnecting switch is arranged for each phase, and the lower end connection terminal is short-circuited through a cable. After the corresponding phase (such as phase A and phase C) is closed, the ice-melting of the corresponding phase of the outgoing line of the end station can be realized. However, this type of switch can only meet the ice-melting requirements of the outgoing line of the end station.
[0004] With the development of new energy, many wind power plants have been newly built in the north of Guangxi Zhuang Autonomous Region. According to the requirements of the access system, multiple wind farms in a certain area need to be connected to one wind power plant booster station through 110kV or 220kV overhead lines for centralized outgoing. In order to meet the needs of ice-melting work management, the section ice-melting of the merging line and the branch line is often required at this time. At the same time, with the increase of ice-melting requirements, there are 2 sets or more of ice-melting power supplies on the ice-melting line, and each set of ice-melting power supply requires independent operation, that is, when one set of ice-melting power supply is running, the remaining ice-melting power supplies need to be reliably isolated from the running ice-melting power supply. The foregoing conventional vertically telescopic ice-melting disconnecting switch does not have the above two functions. SUMMARY
[0005] The utility model wants to solve the technical problem to provide a kind of structure simple, economic practical, safe multi-effect combined ice-melting disconnecting switch with short-circuiting and isolating functions.
[0006] To solve the above technical problems, the utility model adopts the following technical solutions:
[0007] The combined ice-melting disconnecting switch with short-circuiting and isolating functions includes a vertically telescopic ice-melting disconnecting switch composed of a main ice-melting disconnecting switch operating mechanism and a main ice-melting disconnecting switch connected and controlled by the main ice-melting disconnecting switch operating mechanism, and further includes a 35kV horizontal rotary disconnecting switch connected and controlled by a 35kV horizontal rotary disconnecting switch operating mechanism.
[0008] The main ice-melting disconnecting switch operating mechanism and the 35kV horizontal rotary disconnecting switch operating mechanism are respectively installed on the round steel column, and a channel steel base is arranged at the top end of the round steel column.
[0009] The channel steel base is provided with a main ice-melting disconnecting switch post insulator at one end and a 35kV post insulator at the other end, and a 35kV horizontal rotary disconnecting switch post insulator is arranged at the side.
[0010] The lower end of the main ice-melting disconnecting switch is arranged on the 35kV post insulator through the base, and the upper end is connected with the main ice-melting disconnecting switch post insulator.
[0011] The fixed end of the 35kV horizontal rotary disconnecting switch is connected with the 35kV horizontal rotary disconnecting switch post insulator, and the movable end is rotatably connected with the lower end of the main ice-melting disconnecting switch.
[0012] In view of the ice-melting requirement of the line of the wind power plant in the north of Guangxi at present, the inventor designs a combined ice-melting disconnecting switch with short-circuit and isolation functions on the basis of the conventional vertical telescopic ice-melting disconnecting switch, which comprises a vertical telescopic ice-melting disconnecting switch composed of a main ice-melting disconnecting switch operating mechanism and a main ice-melting disconnecting switch connected and controlled by the main ice-melting disconnecting switch operating mechanism, and a 35kV horizontal rotary disconnecting switch connected and controlled by a 35kV horizontal rotary disconnecting switch operating mechanism.
[0013] Compared with the prior art, the utility model has following outstanding advantages:
[0014] <1> more perfect function
[0015] The utility model discloses through adding a 35kV horizontal rotary disconnecting switch, can realize two kinds of switch function (35kV ice-melting short-circuit switch, 35kV ice-melting power supply disconnecting switch two kinds). Specifically
[0016] After setting the 35kV horizontal rotary disconnecting switch on the main ice-melting disconnecting switch, can satisfy the function of the convergence wind power plant terminal station (switch closing can realize the ice-melting of convergence after sending out line alone), also can satisfy its transition station's function (switch opening can guide ice-melting current to the next stage wind field, realizes two section line joint ice-melting), and simultaneously, for the ice-melting voltage from the isolation of different ice-melting power supply, eliminates its influence to other ice-melting power supply equipment, sets the 35kV horizontal rotary disconnecting switch on the main ice-melting disconnecting switch, and through opening this switch, can satisfy the isolation function.
[0017] <2> compact structure
[0018] The utility model fixes the 35kV horizontal rotary disconnecting switch on the side of the main ice-melting disconnecting switch steel frame base, and the structure is compact and simple.
[0019] <3> save investment, convenient for implementation
[0020] Applying this utility model can save on connecting cables and their cable terminal accessories, and at the same time eliminates the need to set up independent civil engineering foundations for the 35kV de-icing short-circuit switch or the 35kV de-icing power disconnect switch, which facilitates on-site construction.
[0021] In summary, this utility model is a combined de-icing isolating switch that is simple in structure, economical, practical, safe, and multi-functional. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure and installation status of a conventional vertical telescopic de-icing disconnect switch.
[0023] Figure 2 This is a schematic diagram of the structure and installation status of the combined ice-melting disconnect switch with short-circuiting and isolation functions of this utility model.
[0024] In the diagram: 1. Main de-icing disconnect switch; 2. Main de-icing disconnect switch post insulator; 3. 35kV post insulator; 4. Channel steel base; 5. Main de-icing disconnect switch operating mechanism; 6. Round steel column; 7. 35kV horizontal rotary disconnect switch; 8. 35kV horizontal rotary disconnect switch post insulator; 9. 35kV horizontal rotary disconnect switch operating mechanism. Detailed Implementation
[0025] Figure 1 This invention demonstrates a conventional vertical telescopic de-icing disconnect switch. Based on this, and considering its structural characteristics and the aforementioned two functional requirements, the inventor designed this utility model of a combined de-icing disconnect switch with short-circuiting and isolation functions. Details are as follows:
[0026] I. Basic Structure
[0027] like Figure 2 As shown, the present invention is a combined de-icing disconnect switch with short-circuiting and isolation functions, including a vertical telescopic de-icing disconnect switch composed of a main de-icing disconnect switch operating mechanism 5 and a main de-icing disconnect switch 1 connected and controlled by it, and a 35kV horizontal rotary disconnect switch 7 connected and controlled by a 35kV horizontal rotary disconnect switch operating mechanism 9.
[0028] in,
[0029] The main de-icing disconnector operating mechanism and the 35kV horizontal rotary disconnector operating mechanism are respectively mounted on round steel columns 6, with a channel steel base 4 at the top of the round steel column. The main de-icing disconnector post insulator 2 is mounted at one end of the channel steel base, the 35kV post insulator 3 at the other end, and the 35kV horizontal rotary disconnector post insulator 8 is mounted on the side. The lower end of the main de-icing disconnector is mounted on the 35kV post insulator via the base, and the upper end is connected to the main de-icing disconnector post insulator. The fixed end of the 35kV horizontal rotary disconnector is connected to the 35kV horizontal rotary disconnector post insulator, and the movable end is rotatably connected to the lower end of the main de-icing disconnector.
[0030] II. Usage Method
[0031] To meet the needs of segmented de-icing of the transmission lines, a 35kV horizontal rotary disconnector is added to the main de-icing disconnector at the junction station. Its base is bolted to the existing base; its moving contact connects and disconnects with the main de-icing disconnector via rotation, ensuring safe and reliable operation; its stationary contact side terminals are fixedly connected to the power cable of the de-icing power supply. The 35kV post insulator is installed at a height matching the height of the copper busbar connection; its switch operating mechanism box (electric / manual) is fixed to the existing round steel column via clamps or welding. This constitutes the combined de-icing disconnector with short-circuiting and isolation functions of this utility model.
[0032] 1) When only de-icing is required on the outgoing lines after the junction, the junction station acts as the terminal station in the de-icing wiring. De-icing can be completed by closing this 35kV horizontal rotary disconnect switch and the main de-icing disconnect switch.
[0033] 2) When de-icing is required on the transmission lines of the next-level wind farm, the combiner station serves as a transition station in the de-icing wiring. In order to form a de-icing circuit, the main de-icing disconnect switch is closed and the short-circuit switch is opened. At the same time, the terminal 35kV horizontal rotary disconnect switch configured in the next-level wind farm is closed to complete the de-icing.
[0034] Meanwhile, in situations where there are two or more de-icing power supplies, during de-icing, there is a possibility that the voltage of the de-icing power supply in operation may be transmitted to the other de-icing power supplies through conductors. Therefore, a 35kV horizontal rotary disconnect switch can be added to the main de-icing disconnect switch in the corresponding bay to isolate this voltage and eliminate its impact on other de-icing power supply equipment.
Claims
1. A combined de-icing disconnect switch with short-circuiting and isolation functions, comprising a vertical telescopic de-icing disconnect switch consisting of a main de-icing disconnect switch operating mechanism and a main de-icing disconnect switch connected to and controlled therebetween, characterized in that... It also includes a 35kV horizontal rotary disconnector connected and controlled by a 35kV horizontal rotary disconnector operating mechanism.
2. The combined de-icing disconnect switch according to claim 1, characterized in that: The main de-icing disconnector operating mechanism and the 35kV horizontal rotary disconnector operating mechanism are respectively mounted on round steel columns, and a channel steel base is provided at the top of the round steel columns.
3. The combined de-icing disconnect switch according to claim 2, characterized in that: The main de-icing disconnector post insulator is installed at one end of the channel steel base, a 35kV post insulator is installed at the other end, and a 35kV horizontal rotary disconnector post insulator is installed on the side.
4. The combined de-icing isolating switch according to claim 3, characterized in that: The lower end of the main de-icing disconnector is mounted on the 35kV post insulator via a base, and the upper end is connected to the main de-icing disconnector post insulator.
5. The combined de-icing isolating switch according to claim 1, characterized in that: The fixed end of the 35kV horizontal rotary disconnector is connected to the support insulator of the 35kV horizontal rotary disconnector, and the movable end is rotatably connected to the lower end of the main de-icing disconnector.