Direct-current deicing tail end three-phase short-circuit wire device and method suitable for personnel operation

Abstract

The invention relates to the technical field of direct current ice melting, and discloses a direct current ice melting tail end three-phase short wiring device and method suitable for personnel operation, and the device comprises a transformer and an insulating rod, and is used for avoiding the climbing operation; the ice-melting short-circuit wire is used for performing three-phase short circuit on the 110kv or 220kv isolating switch; according to the device, the insulating rod is used for replacing a traditional climbing operation mode, so that the safety risk caused by high-altitude operation is remarkably reduced. Meanwhile, the fastening cable buckle and the improved hericium erinaceus structure which are made of high-strength materials are adopted, so that the stability and the reliability of the whole system are further enhanced. By applying direct current to an iced line, ice and snow accumulated on the line are effectively removed by using a current heating effect. The method is not only high in efficiency, but also capable of quickly recovering the power transmission capability and reducing the power supply interruption time caused by weather reasons. The installation process is simple and fast and can be completed without complex tools or special skills.

Description

Technical Field

[0001] The invention relates to the technical field of direct current ice melting, and in particular to a direct current ice melting terminal three-phase short-circuiting device and method suitable for human operation. Background Art

[0002] At present, the mainstream ice melting methods are manual de-icing and DC ice melting. When DC ice melting is used, it is necessary to overlap at the end of the DC ice melting device (the beginning of ice melting), and at the same time, the end of the ice melting line needs to be short-circuited to form a closed ice melting loop. The end short-circuit point is generally at the corresponding line-side disconnector of the substation.

[0003] In substations without ice-melting short-circuit switches, manual short-circuiting is usually used. In snowy weather, four maintenance personnel are required to be stationed at the substation in advance to deal with emergencies such as road closures. Based on a five-day stationing, 380 people are required to be stationed at 19 stations. Based on the employee's labor productivity being twice the remuneration (remuneration is calculated at 400 yuan / day), the opportunity cost of stationing at the station to deal with the cold wave is 380*0.08=304,000 yuan, which is a huge waste of human resources.

[0004] In addition, short-circuiting work requires the installation of grounding wires first. After manual short-circuiting, the grounding wires must be removed before DC ice-melting can be carried out, which increases the power outage time of the line by at least 3 hours (including the time for work ticket processing, work permits, and work). Taking the 110kV Youqiao West Line as an example, DC ice-melting is required almost every year. Taking the line's minimum active power transmission of 3MW in winter as an example, the active power transmission is reduced by 9MWh due to manual splicing. Converted into electricity charges (0.4667 yuan / kWh as an example), the power transmission is reduced by 4,200 yuan, and the 37 lines reduce the power transmission by 155,400 yuan. When considering installing an ice-melting short-circuiting knife switch to solve the problem of manual short-circuiting, the investment is about 200,000 yuan, which is too costly. Summary of the invention

[0005] In view of the problems existing in the above-mentioned existing three-phase short-circuit device for direct current ice melting terminal operated by personnel, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a three-phase short-circuit device at the end of a DC ice-melting device suitable for human operation, and its purpose is to solve the problems of 1) a large number of maintenance personnel and high personnel costs during the ice-melting process; 2) high maintenance costs and long line power outages; 3) long operation time for maintenance personnel, great difficulty in operation and low safety; 4) poor manual deicing effect; 5) complicated steps and relatively serious losses.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: A three-phase short-circuit device for direct current ice melting terminal suitable for human operation comprises a transformer, one side of which is equipped with an insulator; an insulating rod, which is composed of two 1.5m rods spliced ​​into a 3m insulating rod, which is used to avoid high-altitude operation; an ice melting short-circuit, which is 300mm 2 The soft copper wire is used to short-circuit the three phases of the 110kv or 220kv disconnector; the cable buckle is used to fix the cable to the insulating rod.

[0008] As a preferred solution of the three-phase short-circuit device at the end of direct current ice melting suitable for personnel operation as described in the present invention, the insulating rod is used to isolate the operator from the high-voltage environment, and the insulating rod is tightened with the monkey head through a nut to achieve the docking of the two rods of the insulating rod.

[0009] As a preferred solution of the three-phase short-circuit device for direct current ice-melting terminal suitable for human operation described in the present invention, the ice-melting short-circuit is fixed to the insulating rod by the fastening cable buckle.

[0010] As a preferred solution of the three-phase short-circuit device for direct current ice melting terminal suitable for human operation described in the present invention, the monkey head of the insulating rod can be hung on the terminal short-circuit point of the transformer.

[0011] As a preferred solution of the three-phase short-circuiting device for direct current ice melting terminal suitable for personnel operation described in the present invention, the monkey head is tightened on the terminal short-circuit point of the transformer by the fastening cable buckle to achieve three-phase short-circuiting.

[0012] As a preferred solution of the three-phase short-circuit device for direct current ice melting terminal suitable for human operation described in the present invention, a clamping part is installed at one end of the cable fastening buckle, and the clamping part tightly connects the cable and the insulating rod.

[0013] As a preferred solution of the three-phase short-circuit device for direct current ice melting terminal suitable for human operation described in the present invention, one end of the cable fastening buckle is fixedly connected to the insulator.

[0014] As a preferred solution of the three-phase short-circuit device for direct current ice melting terminal suitable for human operation described in the present invention, the cable fastening buckle extends an iron sheet on the traditional monkey head connector to fix the cable and the monkey head rod through a nut.

[0015] As a preferred solution of the three-phase short-circuit device for direct current ice melting terminal suitable for human operation described in the present invention, the cable fastening buckle is made of high-strength material.

[0016] To solve the above problems, the present invention also provides the following technical solutions: assemble insulating rods of required length; use cable fastening buckles to fix the ice-melting short-circuit wires on the insulating rods; install one end of the insulating rod to the end short-circuit point of the transformer to complete the three-phase short-circuit.

[0017] Beneficial effects of the present invention: This device significantly reduces the safety risks caused by high-altitude operations by using insulating rods to replace traditional high-altitude operations. At the same time, the fastening cable buckles and improved monkey head structures made of high-strength materials further enhance the stability and reliability of the overall system. By applying direct current to the ice-covered lines, the heating effect of the current is used to effectively remove the ice and snow accumulated on the lines. This method is not only efficient, but also can quickly restore power transmission capabilities and reduce power outages caused by weather reasons. The installation process is simple and quick, and can be completed without complex tools or special skills. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0020] Figure 2 It is a side structural schematic diagram of the present invention.

[0021] Figure 3 The overall structure of the present invention is shown in FIG. Figure 2 .

[0022] Figure 4 It is a schematic diagram of the top structure of the present invention.

[0023] In the figure:

[0024] 100. Transformer; 200. Insulating rod; 300. Ice-melting short-circuit wire; 400. Fasten the cable clip. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Example 1

[0030] Reference Figure 1 , which is the first embodiment of the present invention, provides a three-phase short-circuit device and method for direct current ice melting end operation suitable for personnel operation, the device includes a transformer 100, an insulator is installed on one side of the transformer 100; an insulating rod 200, which is spliced ​​by two 1.5m rods into a 3m insulating rod 200, which is used to avoid high-altitude operation; an ice melting short-circuit 300, which is 300mm 2 The soft copper wire is used to short-circuit the three phases of the 110kv or 220kv disconnector; the cable clamp 400 is fastened to fix the cable to the insulating rod 200.

[0031] Specifically, the insulating rod 200 is used to isolate the operator from the high-voltage environment. The insulating rod 200 is tightened with the monkey head through a nut to achieve the docking of the two rods of the insulating rod 200.

[0032] Furthermore, the monkey head of the insulating rod 200 can be hung on the end short-circuit point of the transformer 100 , and the ice-melting short-circuit wire 300 is fixed to the insulating rod 200 by fastening the cable buckle 400 .

[0033] The transformer 100 is the power supply for the whole system, and it provides the required power support for the ice melting process. An insulator is installed on one side of the transformer 100 to ensure electrical isolation and safety under high voltage environment.

[0034] The insulating rod 200 is made up of two 1.5m long rods, with a total length of 3m. The main purpose of this design is to eliminate the need for operators to work at height, thereby greatly reducing the risks associated with high-altitude operations. The insulating rod 200 not only provides the necessary physical distance to isolate the high-voltage environment, but also achieves a firm connection between the two rods through the nut and monkey head structure, further enhancing the stability and reliability of the overall structure.

[0035] Ice melting short-circuit wire 300 adopts cross-sectional area of ​​300300mm 2 The function of the 110kV or 220kV disconnector is to short-circuit the three phases of the disconnector to establish an effective closed circuit. When the current flows through this closed loop, it will generate enough heat to melt the ice and snow covering the line.

[0036] The cable fastening buckle 400 acts to fix the ice melting short-circuit wire 300 and the insulating rod 200 to ensure a stable and reliable connection between the two. This not only helps to maintain the integrity of the circuit, but also increases the overall stability of the device during operation.

[0037] When in use, first use the nut and monkey head mechanism to tightly connect the two parts of the insulating rod 200; then, the operator can hang the monkey head at the end of the insulating rod 200 on the short-circuit point specified by the transformer 100; finally, fix the ice-melting short-circuit wire 300 to the insulating rod 200 by fastening the cable buckle 400. In this way, not only the three-phase short circuit is realized to form a closed loop, but also the operator does not need to directly contact the high-voltage area during the whole process, which effectively ensures personal safety. The whole solution cleverly combines electrical engineering principles and ergonomic considerations, providing an innovative and practical method for solving the problem of icing on transmission lines.

[0038] Example 2

[0039] Reference Figures 1 to 3 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a clamping portion is installed at one end of the cable fastening buckle 400, and the clamping portion tightly connects the cable and the insulating rod 200. One end of the cable fastening buckle 400 is fixedly connected to the insulator. The cable fastening buckle 400 extends an iron sheet on the traditional monkey head joint to fix the cable and the monkey head rod through a nut.

[0040] Furthermore, the cable fastening buckle 400 is made of high-strength material, and the monkey head is tightened on the end short-circuit point of the transformer 100 by fastening the cable fastening buckle 400 to achieve three-phase short-circuit.

[0041] When in use, the cable fastening buckle 400 is used to ensure a safe and reliable connection between the ice melting short-circuit wire 300 and the insulating rod 200 as well as other parts of the entire system. One end of the cable fastening buckle 400 is equipped with a clamping part, which can clamp 300mm 2 The soft copper wire (ie, the ice-melting short-circuit wire 300) is tightly fixed together with the insulating rod 200 pieces, ensuring good electrical contact and mechanical strength even under extreme weather conditions.

[0042] The clamping part is used to clamp the cable, and realizes the tight combination between the cable and the insulating rod 200 by physical means. This design not only improves the stability of the overall structure, but also enhances the safety during operation.

[0043] The cable fastening buckle 400 is made of high-strength material, which enables it to remain unchanged while withstanding greater tensile force, ensuring stable performance even after long-term use.

[0044] The cable fastening clip 400 adds a metal extension to the traditional monkey head connector. This improvement allows the cable to be fixed to the monkey head rod more conveniently and quickly, and is further reinforced by a nut. This design simplifies the installation process while improving the safety and durability of the connection point.

[0045] One end of the cable fastening buckle 400 is fixedly connected to the insulator on one side of the transformer 100. The purpose of this arrangement is to ensure that the entire system can still maintain good electrical isolation characteristics under high voltage environment and avoid potential safety hazards caused by direct contact.

[0046] Finally, by tightening the monkey head on the short-circuit point at the end of the transformer 100 using the cable fastening buckle 400, the short-circuit work of the three phases of the 110kV or 220kV disconnector can be effectively completed. The closed loop formed in this way provides conditions for the subsequent application of direct current to heat and remove ice.

[0047] In summary, the cable fastening clip 400, through its unique structural design and the use of high-quality materials, not only ensures the safe operation of electrical equipment, but also greatly improves the operating efficiency and convenience, and is an indispensable and important part of the entire ice melting device.

[0048] Example 3

[0049] Reference Figures 1 to 4 , which is the third embodiment of the present invention.

[0050] The operation process of this device is as follows: First, two 1.5-meter-long insulating rods are spliced ​​into a 3-meter-long whole according to actual needs. This step is achieved by using a specific connection mechanism (such as nuts and monkey heads) to ensure a firm connection between the two sections.

[0051] Use the cable clamp 400 to tighten the 300mm 2 The soft copper wire (i.e., ice melting short-circuit wire 300) is fixed to the assembled insulating rod 200. One end of the cable fastening buckle 400 has a clamping part, which can effectively tightly combine the cable with the insulating rod 200; the other end is designed with an extended iron sheet, which is further fixed to the monkey head part on the insulating rod 200 through a nut, ensuring a safe connection between the cable and the insulating rod 200.

[0052] One end of the insulating rod 200 equipped with the ice melting short-circuit wire 300 is hung at the short-circuit point at the end of the transformer 100. The monkey head part on the insulating rod 200 is tightly fixed at the corresponding position of the transformer 100 by rotation adjustment, thereby completing the short-circuit work of the three phases of the 110kV or 220kV disconnector.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A three-phase short-circuit device for direct current ice melting terminal suitable for human operation, characterized in that: include, A transformer (100), wherein an insulator is installed on one side of the transformer (100); The insulating rod (200) is composed of two 1.5 m rods spliced ​​together to form a 3 m insulating rod, which is used to avoid the need for high-altitude operations; Ice melting short-circuit (300), 300mm 2 Soft copper wire is used to short-circuit the three phases of 110kv or 220kv disconnector; The cable fastening buckle (400) is used to fix the cable to the insulating rod (200).

2. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to claim 1, characterized in that: The insulating rod (200) is used to isolate an operator from a high-voltage environment, and the insulating rod (200) is tightened with a monkey head through a nut to achieve docking of two rods of the insulating rod (200).

3. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to claim 2, characterized in that: The ice-melting short-circuit wire (300) is fixed to the insulating rod (200) via the cable fastening buckle (400).

4. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to claim 3, characterized in that: The monkey head of the insulating rod (200) can be hung on the short-circuit point at the end of the transformer (100).

5. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to any one of claims 1 to 4, characterized in that: The monkey head is screwed onto the terminal short-circuit point of the transformer (100) by means of the cable fastening buckle (400), thereby achieving three-phase short-circuit.

6. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to claim 5, characterized in that: A clamping portion is installed at one end of the cable fastening buckle (400), and the clamping portion tightly connects the cable and the insulating rod.

7. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to claim 6, characterized in that: One end of the cable fastening buckle (400) is fixedly connected to the insulator.

8. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to claim 7, characterized in that: The cable fastening buckle (400) extends an iron sheet on a traditional monkey head joint, and fixes the cable and the monkey head rod through a nut.

9. The three-phase short-circuit device for direct current ice melting terminal suitable for human operation according to claim 8, characterized in that: The cable fastening buckle (400) is made of high-strength material.

10. A method for using a three-phase short-connection device for direct current ice melting terminal suitable for human operation, comprising the three-phase short-connection device for direct current ice melting terminal suitable for human operation according to claims 1 to 9, characterized in that: A. Assemble the insulating rod of the required length; B. Use the cable fastening buckle to fix the ice melting short-circuit wire on the insulating rod; C. Install one end of the insulating rod to the short-circuit point at the end of the transformer to complete the three-phase short-circuit.

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