A transformer power supply line safety inspection device and control method thereof

Abstract

Conventional electrical switches (circuit breakers) can only mechanically lock the ground knife of the main body. When the ground knife is in the closed state, the switch cannot be sent to the working position to close, but other safety measures such as the ground wire that are independent of the switch cannot be locked. Based on the information technology of the Internet of Things, the present invention proposes a transformer power supply line safety maintenance device and a control method thereof, which adds an electronic tag identification device in the ground wire management cabinet, and implants electronic chips in the low-voltage side ground wire and the low-voltage bus ground wire respectively, and the electronic chip can be identified by the electronic tag identification device. In addition, by setting up a central management system, it is respectively connected with the ground wire management cabinet and the electrical switch to form information communication, and the central management system controls the unlocking and locking of the ground wire management cabinet. During the maintenance process, when the ground wire is not returned to its position, the electrical switch is locked to prevent closing, thereby effectively improving the safety of equipment operation and life safety.

Description

Technical Field

[0001] The invention relates to a transformer power supply line safety protection technology, and in particular to a transformer power supply line safety inspection and maintenance device and a control method thereof. Background Art

[0002] The five-protection devices of traditional electrical switchgear mainly rely on the five-protection locking mechanism of the electrical switch itself. However, safety measures outside the switch body, such as artificial grounding devices or ground wires, cannot be effectively locked and can only be managed and controlled by manual methods such as operation tickets. In the power industry, it is often the case that after maintenance, switches are closed with ground wires because safety measures such as ground wires are not removed, resulting in serious consequences. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the existing five-protection measures technology for electrical switches, especially the safety issues outside the switch body, and propose a more reliable online management method to associate artificial grounding devices, ground wires, etc. with electrical switches, thereby effectively improving the effectiveness and reliability of electrical five-protection locking.

[0004] With the continuous advancement of Internet of Things technology and the continuous development of informationization and intelligence of electrical switches, major well-known circuit breaker manufacturers have successively launched circuit breakers with information interfaces, such as Schneider's MTZ series and ABB's IVD4 series, but they can only achieve five-protection locking of the ground switch of the circuit breaker body, and cannot achieve locking of external safety measures. In view of this defect, the present invention utilizes the information interface of the circuit breaker to integrate traditional external safety facilities such as ground wires as part of the circuit breaker, and performs unified coding management, so that when the ground wire is not removed and returned to its original position, it can be effectively locked to prevent the circuit breaker from closing, avoid electrical accidents, and further ensure personal safety.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a transformer power supply line safety inspection device, including a transformer power supply line, high voltage electricity is connected to the transformer from the high voltage side through the high voltage line, and low voltage is output from the low voltage side through the low voltage bus after voltage reduction, a high voltage side electrical switch is arranged on the high voltage side, and a low voltage side electrical switch is arranged on the low voltage side, and the device is characterized in that it also includes:

[0006] A ground wire management cabinet with an electronic tag identification device, wherein the ground wire management cabinet has a locking mechanism, and the locking mechanism enables the ground wire management cabinet to have an unlocking mode and a locking mode;

[0007] A low-voltage side ground wire and a low-voltage bus ground wire with electronic tags, wherein electronic chips are respectively implanted in the low-voltage side ground wire and the low-voltage bus ground wire, and the electronic chips can be identified by the electronic tag identification device;

[0008] Central management system;

[0009] A high-voltage side electrical switch (i.e., a high-voltage side circuit breaker), a low-voltage side electrical switch (i.e., a low-voltage side circuit breaker), and one high-voltage side electrical switch corresponds to one low-voltage side ground wire, and one low-voltage side electrical switch corresponds to one low-voltage busbar ground wire.

[0010] The ground wire management cabinet is connected to the low-voltage side ground wire and the low-voltage bus ground wire;

[0011] The central management system and the electronic tag identification device form an information connection;

[0012] The central management system is informationally connected to the high-voltage side electrical switch and the low-voltage side electrical switch respectively.

[0013] Furthermore, the electronic chip is a radio frequency identification chip.

[0014] Furthermore, the electronic tag identification device is a card reader that can identify the radio frequency identification chip.

[0015] Furthermore, the central management system is a management system of the high-voltage side electrical switch and the low-voltage side electrical switch themselves.

[0016] Furthermore, the central management system is a power plant monitoring system.

[0017] Furthermore, the locking mechanism is a magnetic locking device.

[0018] A control method for a transformer power supply line safety inspection device, comprising:

[0019] When the transformer power supply line operates normally, the high-voltage side electrical switch and the low-voltage side electrical switch are in a closed state, the low-voltage bus outputs voltage, and the low-voltage side ground wire and the low-voltage bus ground wire are respectively placed in the corresponding positions of the ground wire management cabinet according to the numbers;

[0020] When the transformer power supply line needs to be repaired, firstly, the high-voltage side electrical switch and the low-voltage side electrical switch are disconnected to put them in the open state, then, the low-voltage side ground wire is connected to the low-voltage side of the transformer to ground it, and the low-voltage bus ground wire is connected to the low-voltage bus to ground it;

[0021] Its characteristics are:

[0022] When the ground wire management cabinet is in unlocking mode, the low-voltage side ground wire and the low-voltage bus ground wire can be taken out from the ground wire management cabinet, and when the ground wire management cabinet is in locking mode, the low-voltage side ground wire and the low-voltage bus ground wire are locked in the ground wire management cabinet and cannot be taken out;

[0023] Through the electronic tag identification device and the electronic chip, the central management system can obtain the position information of the low-voltage side ground wire and the low-voltage bus ground wire and thereby control the unlocking mode and locking mode of the ground wire management cabinet;

[0024] When the ground wire is not in place (i.e. the ground wire is not placed in the corresponding position in the ground wire management cabinet), the corresponding electrical switch is locked to prevent it from closing;

[0025] When the high-voltage side electrical switch and the low-voltage side electrical switch are in the open state, the corresponding ground wire in the ground wire management cabinet is unlocked so that it can be taken out.

[0026] Furthermore, under the control of the central management system, when the high-voltage side electrical switch and the low-voltage side electrical switch are in the open state, the corresponding ground wire in the ground wire management cabinet is unlocked so that it can be taken out.

[0027] Furthermore, under the control of the central management system, when the low-voltage side ground wire and the low-voltage bus ground wire are not returned to their original positions, the corresponding high-voltage side electrical switch and the low-voltage side electrical switch are locked to prevent closing.

[0028] The beneficial effects of the present invention are as follows: the traditional circuit breaker can only mechanically lock the grounding knife of the main body. When the grounding knife is in the closed state, the switch cannot be sent to the working position to close the switch, but other safety measures such as the ground wire that are independent of the switch cannot be locked. Based on the information technology of the Internet of Things, the method proposed by the present invention implants traditional ground wires and other safety measures into the Internet of Things identification chip, which is mutually associated with the electrical switch, and the ground wires are numbered and become "part" of the circuit breaker to be associated, thereby achieving mutual locking. When the safety measures for maintenance have not been removed and the ground wire has not been returned to its original position, the electrical switch is locked to prevent closing, thereby effectively improving the safety of equipment operation and life safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 , Figure 2 This is a schematic diagram of an embodiment of a transformer power supply line safety inspection device proposed by the present invention. Figure 1 This is the circuit diagram for maintenance; Figure 2 This is a schematic diagram of information connectivity.

[0030] In the figure,

[0031] 1.1 high voltage side, 1.1A high voltage side electrical switch,

[0032] 1.2 low voltage side, 1.2A low voltage side electrical switch,

[0033] 2 transformers,

[0034] 3.1 Low voltage side ground wire,

[0035] 3.2 Low voltage bus ground wire,

[0036] 4 low voltage busbars,

[0037] 5 ground wire management cabinet, 5.1, lockable first storage cabinet barrel, 5.2, lockable second storage cabinet barrel, 5.11, 5.21 cabinet barrel numbers,

[0038] 6Central management system. DETAILED DESCRIPTION

[0039] Figure 1 , Figure 2 This is a schematic diagram of an embodiment of a transformer power supply line safety inspection device proposed by the present invention. Figure 1 This is the circuit diagram for maintenance; Figure 2 The figure shows that in this example, a transformer power supply line safety inspection device includes a transformer power supply line, high voltage electricity is connected to transformer 2 from high voltage side 1.1 through high voltage line, and low voltage is output from low voltage side 1.2 through low voltage bus 4 after voltage reduction, a high voltage side electrical switch 1.1A is provided on the high voltage side 1.1, and a low voltage side electrical switch 1.2A is provided on the low voltage side 1.2.

[0040] In this example, a ground wire management cabinet 5 with an electronic tag identification device is further provided. The ground wire management cabinet 5 has a locking mechanism. The locking mechanism enables the ground wire management cabinet to have an unlocking mode and a locking mode. Figure 2 As shown in FIG. 1 , the ground wire management cabinet 5 includes a plurality of lockable storage cabinet barrels, such as a lockable first storage cabinet barrel 5.1 and a lockable second storage cabinet barrel 5.2.

[0041] At the same time, a low-voltage side ground wire 3.1 and a low-voltage busbar ground wire 3.2 with electronic tags are also provided, and electronic chips are respectively implanted in the low-voltage side ground wire 3.1 and the low-voltage busbar ground wire 3.2. The electronic chips can be identified by the electronic tag identification device.

[0042] Also includes a central management system 6;

[0043] It also includes a high-voltage side electrical switch 1.1A (i.e., a high-voltage side circuit breaker) and a low-voltage side electrical switch 1.2A (i.e., a low-voltage side circuit breaker), and one high-voltage side electrical switch 1.1A corresponds to one low-voltage side ground wire 3.1, and one low-voltage side electrical switch 3.2 corresponds to one low-voltage busbar ground wire 3.2.

[0044] In this example, based on the Internet of Things information technology, the corresponding storage barrel cabinet in the ground wire management cabinet 5 is connected to the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2 respectively;

[0045] In this example, the central management system 6 is informationally connected to the electronic tag identification device; and the central management system 6 is informationally connected to the high-voltage side electrical switch 1.1A and the low-voltage side electrical switch 1.2A respectively.

[0046] The present invention suggests that in this example, the electronic chip is a radio frequency identification chip.

[0047] The present invention suggests that, in this example, the electronic tag identification device is a card reader that can identify the radio frequency identification chip.

[0048] The present invention indicates that, in this example, the central management system is the management system of the high-voltage side electrical switch and the low-voltage side electrical switch. The present invention indicates that, in other embodiments, the central management system is a power plant monitoring system.

[0049] The present invention suggests that, in this example, the locking mechanism is a magnetic locking device.

[0050] exist Figure 1 and Figure 2 The present invention also proposes a control method for a transformer power supply line safety inspection device, comprising:

[0051] When the transformer power supply line operates normally, the high-voltage side electrical switch 1.1A and the low-voltage side electrical switch 1.2A are in the closed state, the low-voltage bus 4 outputs voltage, and the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2 are placed in the corresponding cabinet barrels of the ground wire management cabinet according to the numbers. Figure 2 It is shown that the low-voltage side ground wire 3.1 is stored in a lockable first storage cabinet barrel 5.1, and the low-voltage busbar ground wire 3.2 is stored in a lockable second storage cabinet barrel 5.2.

[0052] Before the transformer 2 and the low-voltage bus 4 need to be repaired, firstly, the high-voltage side electrical switch 1.1A and the low-voltage side electrical switch 1.2A are disconnected to put them in the open state, and then, the low-voltage side ground wire 3.1 is connected to the low-voltage side 1.2 of the transformer to be grounded; and the low-voltage bus ground wire 3.2 is connected to the low-voltage bus 4 to be grounded.

[0053] In this example, different from the prior art,

[0054] When the transformer 2 and the low-voltage bus 4 need to be repaired at the same time, the high-voltage side electrical switch 1.1A and the low-voltage side electrical switch 1.2A are first disconnected to be in the off-switch state. Under the control of the central management system 6, the first storage cabinet barrel 5.1 and the second storage cabinet barrel 5.2 of the ground wire management cabinet are automatically in the unlocking mode, and the first storage cabinet barrel 5.1 and the second storage cabinet barrel 5.2 in the ground wire management cabinet 5 are unlocked so that the ground wire therein can be taken out. Then the low-voltage side ground wire 3.1 is connected to the low-voltage side 1.2 of the transformer to be grounded; at the same time, the low-voltage bus ground wire 3.2 is connected to the low-voltage bus 4 to be grounded. In addition, during the repair process, since the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2 are not returned to their positions, the system automatically locks the corresponding high-voltage side electrical switch 1.1A and the low-voltage electrical switch 1.2A to prevent artificial closing and avoid safety accidents caused by malfunction.

[0055] When the transformer 2 and the low-voltage bus 4 are overhauled, first disconnect the grounding of the transformer low-voltage side 1.2 and the low-voltage bus 4, then return the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2 to their original positions (i.e., place the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2 in the first storage cabinet barrel 5.1 and the second storage cabinet barrel 5.2, respectively). Thereafter, under the automatic control of the system, the corresponding high-voltage side electrical switch 1.1A and the low-voltage electrical switch 1.2A are unlocked, and the high-voltage side electrical switch 1.1A and the low-voltage electrical switch 1.2A can be closed to supply power.

[0056] Similarly, when the transformer 2 or the low-voltage bus 4 needs to be repaired separately, the same safety operations as above are performed.

[0057] In this example, since an electronic tag identification device capable of identifying a position is provided in the ground management cabinet 5, the electronic tag identification device is a card reader of a radio frequency identification chip, and electronic chips are respectively provided in the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2. Therefore, the electronic tag identification device can know whether the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2 are in the home position, and transmit the information to the central management system 6, and the central management system 6 controls the unlocking or locking of the corresponding cabinet barrel of the ground management cabinet 5.

[0058] In the technical solution proposed by the present invention, based on the information technology of the Internet of Things, an electronic tag identification device capable of identifying the position is added to the ground wire management cabinet 5, and electronic chips are respectively implanted in the low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2, and information is respectively connected with the ground wire management cabinet 5, the high-voltage side electrical switch 1.1A, and the low-voltage side electrical switch 1.2A through the central management system 6, so that the whole system constitutes an integrated safety maintenance protection device. The low-voltage side ground wire 3.1 and the low-voltage bus ground wire 3.2 are respectively linked with the high-voltage side electrical switch 1.1A and the low-voltage side electrical switch 1.2A in safety protection. Effectively ensure the safety of the power supply line maintenance process.

Claims

1. A transformer power supply line safety inspection device, comprising a transformer power supply line, wherein high voltage electricity is connected to a transformer from a high voltage side through a high voltage line, and after voltage reduction, a low voltage is output from a low voltage side through a low voltage bus, a high voltage side electrical switch is arranged on the high voltage side, and a low voltage side electrical switch is arranged on the low voltage side, wherein the transformer power supply line is characterized in that: include: A ground wire management cabinet with an electronic tag identification device, the ground wire management cabinet further comprising a first storage cabinet barrel and a second storage cabinet barrel, the ground wire management cabinet having a locking mechanism, the locking mechanism enabling the ground wire management cabinet to have an unlocking mode and a locking mode; A low-voltage side ground wire and a low-voltage bus ground wire with electronic tags, wherein electronic chips are respectively implanted in the low-voltage side ground wire and the low-voltage bus ground wire, and the electronic chips can be identified by the electronic tag identification device; Central management system; A high-voltage side electrical switch and a low-voltage side electrical switch, wherein one high-voltage side electrical switch corresponds to one low-voltage side ground wire, and one low-voltage side electrical switch corresponds to one low-voltage busbar ground wire; The ground wire management cabinet is connected to the low-voltage side ground wire and the low-voltage bus ground wire; The central management system and the electronic tag identification device form an information connection; The central management system is connected to the high-voltage side electrical switch and the low-voltage side electrical switch respectively. The electronic tag identification device can determine whether the low-voltage side ground wire and the low-voltage bus ground wire are in the reset state, and transmit the information to the central management system, which controls the unlocking or locking of the corresponding cabinet barrel of the ground wire management cabinet.

2. A transformer power supply line safety inspection and maintenance device according to claim 1, characterized in that: The electronic chip is a radio frequency identification chip.

3. A transformer power supply line safety inspection and maintenance device according to claim 2, characterized in that: The electronic tag identification device is a card reader that can identify the radio frequency identification chip.

4. The transformer power supply line safety inspection and maintenance device according to claim 1 is characterized in that: The central management system is the management system of the high-voltage side electrical switch and the low-voltage side electrical switch themselves.

5. The transformer power supply line safety inspection and maintenance device according to claim 1 is characterized in that: The central management system is a power plant monitoring system.

6. The transformer power supply line safety inspection and maintenance device according to claim 1 is characterized in that: The locking mechanism is a magnetic locking device.

7. A control method for a transformer power supply line safety inspection device, comprising a transformer power supply line safety inspection device according to any one of claims 1 to 6, and further comprising the following steps: When the transformer power supply line operates normally, the high-voltage side electrical switch and the low-voltage side electrical switch are in a closed state, the low-voltage bus outputs voltage, and the low-voltage side ground wire and the low-voltage bus ground wire are respectively placed in the corresponding positions of the ground wire management cabinet according to the numbers; When the transformer power supply line needs to be repaired, firstly, the high-voltage side electrical switch and the low-voltage side electrical switch are disconnected to put them in the open state, then, the low-voltage side ground wire is connected to the low-voltage side of the transformer to ground it, and the low-voltage bus ground wire is connected to the low-voltage bus to ground it; Its characteristics are: When the ground wire management cabinet is in unlocking mode, the low-voltage side ground wire and the low-voltage bus ground wire can be taken out from the ground wire management cabinet, and when the ground wire management cabinet is in locking mode, the low-voltage side ground wire and the low-voltage bus ground wire are locked in the ground wire management cabinet and cannot be taken out; Through the electronic tag identification device and the electronic chip, the central management system can obtain the position information of the low-voltage side ground wire and the low-voltage bus ground wire and thereby control the unlocking mode and locking mode of the ground wire management cabinet; When the ground wire is not returned to its original position, the corresponding electrical switch is locked to prevent it from closing; When the high-voltage side electrical switch and the low-voltage side electrical switch are in the open state, the corresponding ground wire in the ground wire management cabinet is unlocked so that it can be taken out.

8. The control method of a transformer power supply line safety inspection device according to claim 7 is characterized in that: Under the control of the central management system, when the high-voltage side electrical switch and the low-voltage side electrical switch are in the open state, the corresponding ground wire in the ground wire management cabinet is unlocked so that it can be taken out.

9. The control method of a transformer power supply line safety inspection device according to claim 7 is characterized in that: Under the control of the central management system, when the low-voltage side ground wire and the low-voltage bus ground wire are not returned to their original positions, the corresponding high-voltage side electrical switch and the low-voltage side electrical switch are locked to prevent closing.

Images