Parallel capacity expansion method and drop-out fuse

Abstract

The invention relates to the technical field of power distribution, in particular to a parallel capacity expansion method and a drop-out fuse, the parallel capacity expansion method comprises at least two parallel distribution transformers, and the drop-out fuse is mounted on the high-voltage side of each distribution transformer; the drop-out fuse is matched with high-voltage side protection according to the capacity of the distribution transformer; in a non-overload state, the drop-out fuse is in a closed state; the low-voltage side of the distribution transformer is provided with a distribution internet-of-things low-voltage intelligent switch and a load control terminal; the load control terminal is used for remotely controlling the power distribution internet-of-things low-voltage intelligent switch, and flexible allocation of a power grid under different load conditions is realized by adopting two parallel power distribution transformers and an intelligent control mode. According to the scheme, energy consumption can be effectively reduced in the off-peak period, unnecessary resource waste is reduced, quick response can be achieved in the peak period, the power supply capacity is improved, and the stability of power supply is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution, and in particular to a parallel capacity expansion method and a drop-out fuse. Background Art

[0002] With the continuous development of power systems, the safety and reliability requirements for power equipment are becoming higher and higher. In power transmission and distribution systems, drop-out fuses are a common protection device used to protect transformers from overload and short circuit.

[0003] In the power distribution system, the parallel expansion transformer solution is an effective way to deal with seasonal load peaks and improve system flexibility and energy efficiency. Traditionally, when facing peak loads, a single large-capacity transformer is usually used to meet the maximum load demand, which leads to low equipment utilization during non-peak periods, resulting in energy waste and increased costs. In addition, the drop-out fuse needs to be pulled down in an emergency. After the drop-out fuse is disconnected, it can reduce equipment losses, but it is easy to be accidentally touched during installation or other operations, causing power abnormalities. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above-mentioned problem of using a single large-capacity transformer to meet the maximum load demand, which leads to low equipment utilization during non-peak hours, the present invention is proposed.

[0006] Therefore, one of the objects of the present invention is to provide a parallel capacity expansion method.

[0007] In order to solve the above technical problems, the present invention provides the following technical solution: comprising at least two parallel distribution transformers, wherein a drop-out fuse is installed on the high-voltage side of the distribution transformer;

[0008] The drop-out fuse matches the high-voltage side protection according to the capacity of the distribution transformer;

[0009] In a non-overload state, the drop-out fuse is in a closed state;

[0010] The low-voltage side of the distribution transformer is equipped with a distribution IoT low-voltage intelligent switch and load control terminal;

[0011] The load control terminal is used to remotely control the power distribution IoT low-voltage intelligent switch, thereby controlling the opening and closing states of the low-voltage side of the standby distribution transformer;

[0012] When the main distribution transformer is in a seasonal overload or overload state, the distribution IoT low-voltage intelligent switch is remotely controlled by the load control terminal to enable the standby distribution transformer to enter a load operation state.

[0013] As a preferred solution of the parallel expansion method of the present invention, the drop-out fuse is an intelligent drop-out fuse, and can be remotely operated by operation and maintenance personnel on site to control its opening or closing state.

[0014] As a preferred solution of the parallel capacity expansion method described in the present invention, when the load rate of the main distribution transformer is not overloaded, the intelligent drop-out fuse can be remotely tripped to make the standby distribution transformer exit the operating state.

[0015] As a preferred solution of the parallel capacity expansion method of the present invention, when the load rate of the main distribution transformer is overloaded, the intelligent drop-out fuse can be closed by remote control, so that the standby distribution transformer is put into operation.

[0016] As a preferred solution of the parallel expansion method described in the present invention, the power distribution interconnection low-voltage intelligent switch can be remotely controlled to open the switch in a non-overload state, so that the standby distribution transformer is in a no-load operation state, thereby achieving energy-saving effects.

[0017] The beneficial effects of the parallel capacity expansion method described in the present invention are as follows: the present invention realizes the flexible deployment of the power grid under different load conditions by adopting two parallel distribution transformers and an intelligent control method. The scheme can effectively reduce energy consumption and unnecessary waste of resources during non-peak hours, and can respond quickly during peak hours, increase power supply capacity, and ensure the stability of power supply.

[0018] In actual use, there is still a problem that drop-out fuses are prone to accidental contact, affecting the normal use of electricity.

[0019] In order to solve the above technical problems, the present invention also provides the following technical solutions: a drop-out fuse, comprising the above parallel expansion method, and further comprising: an expansion component, comprising a power pole, a control box is installed between two of the power poles, a main transformer and a sub-transformer are installed on the top of the control box, the control box is connected to the main transformer and the sub-transformer through wires, the connection terminals of the main transformer and the sub-transformer are installed with a drop-out fuse body, and the control box can be used to control the drop-out fuse body;

[0020] The anti-mistaken-touch component includes a mounting plate arranged at the end of the electric pole, the mounting plate is used to fix the drop-type fuse body, the side wall of the drop-type fuse body is installed with a limiter for positioning the insulating operating rod, and the side wall of the drop-type fuse body is installed with an anti-mistaken-touch part for preventing accidental touch.

[0021] As a preferred solution of the drop-out fuse of the present invention, the limiting member includes a spring limiting plate arranged at the end of the insulator, the bottom view of the spring limiting plate is U-shaped, and the side wall of the spring limiting plate is wavy, and limiting grooves are formed between the waves of each spring limiting plate.

[0022] As a preferred solution of the drop-out fuse of the present invention, the limiting member further comprises a fuse tube arranged at the end of the insulating rod of the drop-out fuse body, the end of the fuse tube is stuck in the limiting groove, and a support frame is installed on the outer wall of the spring limiting plate.

[0023] As a preferred solution of the drop-out fuse of the present invention, the limiting member also includes a fixing rod arranged at the top of the supporting frame, the side wall of the fixing rod is sleeved with a sliding block, the top of the sliding block is installed with a limiting block, and a telescopic spring is arranged between the limiting block and the fixing rod.

[0024] As a preferred solution of the drop-out fuse of the present invention, the anti-false-touch component includes a spring shaft installed on the side wall of the spring limit plate, and a clamping plate is installed on the end of the spring shaft, and the clamping plate is used to limit the moving path of the limit.

[0025] Beneficial effects of the drop-out fuse described in the present invention: The present invention effectively prevents improper opening or closing due to misoperation by adding additional mechanical locking mechanisms (such as limit blocks, clamps, springs, etc.), thereby reducing the risk of human error. The drop-out fuse body can be remotely operated through the control box, which reduces the chance of operators directly contacting high-voltage equipment and improves work safety. When a system failure occurs, the mechanical limit structure can effectively prevent incorrect closing, reduce misoperation due to system failure, and improve the overall stability of the system. The system can automatically detect abnormal conditions and trigger the fuse to open, thereby cutting off the power supply in time to prevent the accident from expanding. Reduce energy loss: Through effective fault detection and prevention mechanisms, unnecessary power consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 labor. Among them:

[0027] Figure 1 FIG. 4 is an overall flow chart of the parallel expansion method.

[0028] Figure 2 It is a schematic diagram of the parallel expansion method and the structure of the drop-out fuse.

[0029] Figure 3 It is a schematic diagram of the structure of a drop-out fuse.

[0030] Figure 4 It is the structural side view of the drop-out fuse.

[0031] Figure 5 The figure is a schematic diagram of the position structure of the spring limit plate and the limit block of the drop-out fuse.

[0032] Figure 6 It is a schematic diagram of the cross-sectional structure of the support frame and the limit block of the drop-out type fuse.

[0033] Figure 7 The figure is a schematic diagram of the connection structure between the spring limit plate and the clamping plate of the drop-out fuse.

[0034] Figure 8 for Figure 7 Enlarged view of point A in .

[0035] Reference numerals:

[0036] 100, expansion assembly; 101, electric pole; 102, control box; 103, main transformer; 104, auxiliary transformer; 105, electric wire; 106, drop-out fuse body;

[0037] 200, anti-accidental touch component; 201, mounting plate; 202, limiter; 203, anti-accidental touch component;

[0038] 202a, spring limit plate; 202b, limit groove; 202c, fuse tube; 202d, support frame; 202e, fixing rod; 202f, sliding block; 202g, limit block; 202h, telescopic spring;

[0039] 203a, spring shaft; 203b, clamping plate. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Example 1

[0045] Reference Figure 1 , which is the first embodiment of the present invention, and provides a parallel expansion method.

[0046] It includes at least two parallel distribution transformers, with drop-out fuses installed on the high-voltage side of the distribution transformers;

[0047] Furthermore, the drop-out fuses are matched to the high-voltage side protection according to the capacity of the distribution transformer;

[0048] Further, in a non-overload state, the drop-out fuse is in a closed state;

[0049] Furthermore, a power distribution IoT low-voltage intelligent switch and a load control terminal are installed on the low-voltage side of the distribution transformer;

[0050] Furthermore, the load control terminal is used to remotely control the low-voltage intelligent switch of the power distribution IoT, thereby controlling the opening and closing status of the low-voltage side of the standby distribution transformer;

[0051] Furthermore, when the main distribution transformer is in a seasonal overload or overload state, the distribution IoT low-voltage intelligent switch is remotely controlled by the load control terminal to enable the standby distribution transformer to enter a load operation state.

[0052] Furthermore, the drop-out fuse is an intelligent drop-out fuse, and can be remotely operated on site by operation and maintenance personnel to control its opening or closing state.

[0053] Furthermore, when the load rate of the main distribution transformer is not overloaded, the intelligent drop-out fuse can be remotely tripped, thereby causing the standby distribution transformer to exit the operating state.

[0054] Furthermore, when the load rate of the main distribution transformer is overloaded, the intelligent drop-out fuse can be remotely closed, thereby putting the standby distribution transformer into operation.

[0055] Furthermore, the low-voltage intelligent switch of the power distribution Internet of Things can be remotely controlled to open the switch in a non-overload state, so that the standby distribution transformer is in a no-load operation state, thereby achieving energy saving effects.

[0056] Operation process: Incremental manual type (high-voltage ordinary link + low-voltage circuit breaker automatic): two parallel distribution transformers are equipped with drop-out fuses on the high-voltage side, and the high-voltage side protection is matched according to its capacity, and it is usually in the closed state (power-on anti-theft); the low-voltage side is remotely controlled by installing "distribution Internet of Things low-voltage intelligent switch + load control terminal". When the main distribution transformer is not in a seasonal overload or not overloaded state, the distribution Internet of Things low-voltage intelligent switch can be remotely controlled through the mature "load control terminal". The remote control disconnection will make the low-voltage side of the standby distribution transformer exit the load operation state, and the distribution transformer will run without load (the drop-out fuse can also be pulled to achieve "0" loss) to achieve energy saving goals. During the peak period of seasonal load, the remote control is closed, and the standby distribution transformer runs with load;

[0057] Incremental automatic type (automatic high-voltage Link + automatic low-voltage circuit breaker): two parallel distribution transformers are equipped with drop-out fuses on the high-voltage side (the standby distribution transformer is equipped with an intelligent drop-out fuse. When the load rate of the main distribution transformer is not overloaded, the operation and maintenance personnel can remotely control the drop-out fuse on site to open the switch and let the standby distribution transformer exit operation; when the load rate of the main distribution transformer is overloaded, the operation and maintenance personnel can remotely control the drop-out fuse on site to close the switch and put the standby distribution transformer into operation). The high-voltage side protection is matched according to its capacity, and it is usually in the closed state (powered anti-theft); the low-voltage side is remotely controlled by installing "distribution Internet of Things low-voltage intelligent switch + load control terminal". When the main distribution transformer is not in a seasonal overload or not overloaded state, the maturely applied "load control terminal" can be used to remotely control the distribution Internet of Things low-voltage intelligent switch, and remotely control the opening of the switch to exit the low-voltage side of the standby distribution transformer from the load operation state. During the peak period of seasonal load, the switch is closed by remote control, and the standby distribution transformer operates with load.

[0058] Example 2

[0059] Reference Figure 1-Figure 2, which is the second embodiment of the present invention, and is different from the previous embodiment in that: the expansion component 100 includes an electric pole 101, a control box 102 is installed between two electric poles 101, a main transformer 103 and a sub-transformer 104 are installed on the top of the control box 102, the control box 102 is connected to the main transformer 103 and the sub-transformer 104 through a wire 105, and a drop-out fuse body 106 is installed at the connection terminal of the main transformer 103 and the sub-transformer 104, the control box 102 can be used to control the drop-out fuse body 106, and the drop-out fuse body 106 is installed at the connection terminal of the main transformer 103 and the sub-transformer 104 as a protection device;

[0060] A main transformer 103 and a sub-transformer 104 are installed on the top of the control box 102, and the distance between them is ensured to meet safety standards. The wire 105 connects the control box 102 with the main transformer 103 and the sub-transformer 104 to facilitate power transmission and control signal transmission.

[0061] The rest of the structure is the same as that of Example 1.

[0062] Operation process: The main transformer 103 and the auxiliary transformer 104 are connected to the power grid through their respective drop-out fuse bodies 106. The control box 102 monitors and controls the state of the drop-out fuse body 106 to ensure the normal operation of the power system. When the auxiliary transformer 104 needs to be shut down, the drop-out fuse body 106 can be remotely controlled by the control box 102 to open the gate. If manual operation is required, an insulating rod can be used. According to the method described in Example 3, by moving the limit block 202g, compressing the telescopic spring 202h and other steps, the fuse tube 202c is finally separated from the spring limit plate 202a to achieve opening. If the auxiliary transformer 104 is to be put back into operation, a closing command can be issued through the control box 102. During manual operation, the mechanical locking mechanism is first released, the fuse tube 202c is reinserted into the spring limit plate 202a, and it is ensured to be closed correctly. When the system detects an abnormal situation (such as overload or short circuit), the control box 102 will automatically trigger the drop-out fuse body 106 to open the gate to protect the system. After the fault is eliminated, the fuse is manually reset and the normal operation of the system is restored through the control box 102.

[0063] Example 3

[0064] Reference Figure 3-Figure 8, which is the third embodiment of the present invention. Different from the above embodiments, this embodiment provides a drop-out fuse, including the above-mentioned parallel expansion method, an anti-mistaken touch component 200, including a mounting plate 201 arranged at the end of the electric pole 101, the mounting plate 201 is used to fix the drop-out fuse body 106, the side wall of the drop-out fuse body 106 is installed with a limiter 202 for positioning the insulating operating rod, and the side wall of the drop-out fuse body 106 is installed with an anti-mistaken touch member 203 for preventing accidental touch.

[0065] Furthermore, the limiting member 202 includes a spring limiting plate 202a arranged at the end of the insulator, the bottom view of the spring limiting plate 202a is U-shaped, and the side wall of the spring limiting plate 202a is wavy, and limiting grooves 202b are formed between the waves of each spring limiting plate 202a.

[0066] Furthermore, the limiting member 202 also includes a fuse tube 202c arranged at the end of the insulating rod of the drop-out fuse body 106, the end of the fuse tube 202c is stuck in the limiting groove 202b, and a supporting frame 202d is installed on the outer wall of the spring limiting plate 202a.

[0067] Furthermore, the limiting member 202 also includes a fixed rod 202e arranged at the top of the support frame 202d, the side wall of the fixed rod 202e is sleeved with a sliding block 202f, the top of the sliding block 202f is installed with a limiting block 202g, and a telescopic spring 202h is arranged between the limiting block 202g and the fixed rod 202e.

[0068] Furthermore, the anti-false-touch component 203 includes a spring shaft 203a installed on the side wall of the spring limit plate 202a, and a clamping plate 203b is installed on the end of the spring shaft 203a, and the clamping plate 203b is used to limit the moving path of the limit 202g.

[0069] The rest of the structure is the same as that of Example 2.

[0070] Operation process: When the device is used again, the on-site remote control drop-out fuse body 106 in the control box 102 can be used to open the switch to stop the auxiliary transformer 104 from running. Alternatively, the insulating rod can be held by hand, and the ends of the insulating rod can be placed on the limit rings on both sides of the spring limit plate 202a. Then, the hook of the holding insulating rod can be moved to move the limit block 202g to drive the sliding block 202f to move in the fixed rod 202e, and the telescopic spring 202h can be compressed at the same time. When the limit block 202g moves to the clamping plate 203b, the clamping plate 203b is squeezed to the end of the spring limit plate 202a, and the limit block 202 is not blocked at this time. g moves, and at the same time squeezes and accumulates force on spring shaft 203a. When limit block 202g is separated from card plate 203b, the elastic force of spring shaft 203a can effectively drive card plate 203b to rebound. At this time, limit block 202g is released. Due to the obstruction of card plate 203b, card plate 203b can be limited and fixed. This operation link is added to reduce the risk of misoperation. Then the hook hooks the operating ring of fuse tube 202c, and then the fuse tube 202c is pulled down to open the gate. Since fuse tube 202c is separated from spring limit plate 202a, and the original straightness of spring limit plate 202a is The diameter (that is, the original state without extrusion and limitation) is smaller than the contact point of the fuse tube 202c. Therefore, when the contact point of the fuse tube 202c contacts the spring limiting plate 202a, the spring limiting plate 202a will be stretched open, and the contact point of the fuse tube 202c will be separated from the spring limiting plate 202a. The two sides of the spring limiting plate 202a will rebound inward. Therefore, the rebounding spring limiting plate 202a will drive the clamping plate 203b to move, and the moving clamping plate 203b will be separated from the limiting block 202g. Therefore, the limiting block 202g is not limited by the clamping plate 203b. Therefore, through the telescopic spring 202h The elastic force can effectively drive the limit block 202g to move back to its original position. When the system fails to close the circuit breaker, the limit block 202a does not pull away from the spring limit plate 202a. The limit block 202g limits the spring limit plate 202a, which can effectively reduce the operation caused by system failures, thereby reducing energy loss. This device can not only reduce energy loss but also reduce the risk of false touch. When closing the circuit breaker is required, you only need to pull the limit plate 202a, and then close the fuse tube 202c. The movement of this limit block 202g can be electric or manual, depending on the actual situation.

[0071] 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 parallel expansion method, characterized in that: include, At least two parallel distribution transformers, with drop-out fuses installed on the high-voltage side of the distribution transformers; The drop-out fuse matches the high-voltage side protection according to the capacity of the distribution transformer; In a non-overload state, the drop-out fuse is in a closed state; The low-voltage side of the distribution transformer is equipped with a distribution IoT low-voltage intelligent switch and load control terminal; The load control terminal is used to remotely control the power distribution IoT low-voltage intelligent switch, thereby controlling the opening and closing states of the low-voltage side of the standby distribution transformer; When the main distribution transformer is in a seasonal overload or overload state, the distribution IoT low-voltage intelligent switch is remotely controlled by the load control terminal to enable the standby distribution transformer to enter a load operation state.

2. The parallel capacity expansion method according to claim 1, characterized in that: The drop-out fuse is an intelligent drop-out fuse and can be remotely operated on site by operation and maintenance personnel to control its opening or closing state.

3. The parallel capacity expansion method according to claim 2, characterized in that: When the load rate of the main distribution transformer is not overloaded, the intelligent drop-out fuse can be remotely tripped, thereby causing the standby distribution transformer to exit the operating state.

4. The parallel capacity expansion method according to claim 3, characterized in that: When the load rate of the main distribution transformer is overloaded, the intelligent drop-out fuse can be closed by remote control, so that the standby distribution transformer is put into operation.

5. The parallel capacity expansion method according to claim 4, characterized in that: The power distribution IoT low-voltage intelligent switch can be remotely controlled to open the switch in a non-overload state, so that the standby distribution transformer is in a no-load operation state, thereby achieving energy saving effects.

6. A drop-out fuse, characterized in that: The method for parallel expansion comprises any one of claims 1 to 5, further comprising: An expansion assembly (100) comprises an electric pole (101), a control box (102) is installed between two electric poles (101), a main transformer (103) and a sub-transformer (104) are installed on the top of the control box (102), the control box (102) is connected to the main transformer (103) and the sub-transformer (104) via electric wires (105), a drop-out fuse body (106) is installed at the connection terminals of the main transformer (103) and the sub-transformer (104), and the control box (102) can be used to control the drop-out fuse body (106); The anti-mistaken-touch assembly (200) comprises a mounting plate (201) arranged at the end of the electric pole (101), the mounting plate (201) being used to fix a drop-out fuse body (106), a stopper (202) being installed on the side wall of the drop-out fuse body (106) for positioning an insulating operating rod, and an anti-mistaken-touch member (203) being installed on the side wall of the drop-out fuse body (106) for preventing mistaken-touch.

7. The drop-out fuse according to claim 6, characterized in that: The limiting member (202) comprises a spring limiting plate (202a) arranged at the end of the insulator, the spring limiting plate (202a) is U-shaped in a bottom view, and the side wall of the spring limiting plate (202a) is wavy, and limiting grooves (202b) are formed between the waves of each spring limiting plate (202a).

8. The drop-out fuse according to claim 7, characterized in that: The limiting member (202) further comprises a fuse tube (202c) arranged at the end of the insulating rod of the drop-out fuse body (106), the end of the fuse tube (202c) being stuck in the limiting groove (202b), and a support frame (202d) being installed on the outer wall of the spring limiting plate (202a).

9. The drop-out fuse according to claim 8, characterized in that: The limiting member (202) further comprises a fixing rod (202e) arranged at the top end of the supporting frame (202d); a sliding block (202f) is sleeved on the side wall of the fixing rod (202e); a limiting block (202g) is installed at the top end of the sliding block (202f); and a telescopic spring (202h) is arranged between the limiting block (202g) and the fixing rod (202e).

10. The drop-out fuse according to claim 9, characterized in that: The anti-mis-touch component (203) comprises a spring shaft (203a) installed on the side wall of the spring limit plate (202a), a clamping plate (203b) installed at the end of the spring shaft (203a), and the clamping plate (203b) is used to limit the moving path of the limiter (202g).

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