A temporary replacement platform for relay protection devices

Abstract

The present invention belongs to the technical field of temporary replacement of relay protection devices, and in particular, a temporary replacement platform for relay protection devices. In view of the problem that the traditional replacement method requires power-off replacement and maintenance, which will cause the equipment to stop operating and affect normal use, the following scheme is proposed, which includes: a device appearance module, which is a closed box structure; a device power module, which is a DC power supply; a collection terminal module, which is a test terminal; a device connection module, which is a plug-in connection structure; a mobile module, which is two rear wheels and two front wheels; and a central controller for power control. The integrated replacement platform for relay protection of the present invention successfully solves the problem of complex and high-risk protection test and debugging procedures. It adopts a fully mechanical design to solidify the operation process, replaces tedious manual operations, reduces changes in external secondary circuits, and can provide non-stop protection.

Description

Technical Field

[0001] The invention relates to the technical field of temporary replacement of relay protection devices, and in particular to a temporary replacement platform for relay protection devices. Background Art

[0002] As the substation operates for a long time and the equipment ages, it is necessary to optimize the transformation of the old relay protection equipment in the substation and replace the old equipment in the substation.

[0003] The traditional replacement method requires power outage replacement and maintenance, which will cause the equipment to stop operating and affect normal use. In order not to affect normal operations, it is necessary to implement non-power outage protection replacement operations to reduce the power outage time caused to the line during the protection replacement operation. The clear requirement is that the power outage time of the protection replacement operation line is 0 minutes. For this purpose, a temporary replacement platform for relay protection devices is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the disadvantage that the traditional replacement method requires power off for replacement and maintenance, which will cause the equipment to stop operating and affect normal use, and propose a temporary replacement platform for relay protection devices.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A temporary replacement platform for a relay protection device, comprising:

[0007] The device appearance module is a closed box structure;

[0008] Install a power supply module, which is a DC power supply;

[0009] Acquisition terminal module, the acquisition terminal module is a test terminal;

[0010] Device connection module, the device connection module is a plug-in connection structure;

[0011] Mobile module, the mobile module consists of two rear wheels and two front wheels;

[0012] Central controller for power control.

[0013] Preferably, the two rear wheels and the two front wheels are arranged at the bottom of the closed box structure.

[0014] Preferably, the two front wheels are composed of three wheels in a triangular structure, and are used for climbing stairs, etc.

[0015] Preferably, the central controller, the DC power supply, the test terminals and the plug-in connection structure are all arranged in a closed box structure, and the plug-in connection structure extends to the outside of the closed box structure.

[0016] Preferably, a pull-out handle is provided on the front side of the closed box structure.

[0017] Preferably, the test terminal is used to achieve non-stop replacement protection for the running line. The test terminal acts as a sliding metal part that transmits current, and when switching, it only needs to loosen the screw and move the slider, and the switch position is clear at a glance; test sockets are provided at both ends, and connection tests can be carried out by using corresponding test terminals.

[0018] Preferably, the acquisition terminal module further includes:

[0019] Current and voltage acquisition unit, used to collect the original current and voltage;

[0020] The analysis and judgment unit is used to perform data analysis and judgment on the collected original current and voltage and transmit them to the control unit;

[0021] The regulating unit is used for regulating the current and voltage of the alternative output of the power module of the control device.

[0022] In the present invention, the beneficial effects of the relay protection device temporarily replacing the platform are:

[0023] 1. It solves the problem of delayed protection replacement work due to power outages, greatly shortening the power outage time and production stoppage times of important loads.

[0024] 2. Solved the property loss caused by forced line stoppage;

[0025] 3. The integrated replacement platform for relay protection has successfully solved the problems of complex and risky protection test and debugging procedures. It uses a fully mechanical design to solidify the operating process, replaces tedious manual operations, reduces changes in external secondary circuits, can provide non-stop protection, reduces safety risks, and greatly alleviates the social pressure caused by electricity shortages, effectively promoting social stability and economic development. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a temporary replacement platform for a relay protection device proposed by the present invention;

[0027] Figure 2 A block diagram of a temporary replacement platform for a relay protection device proposed by the present invention;

[0028] Figure 3 This is a block diagram of the acquisition terminal module proposed by the present invention;

[0029] Figure 4 This is a working principle block diagram of a temporary replacement platform for relay protection devices proposed by the present invention;

[0030] Figure 5 Technical reference principle of a temporary replacement platform for relay protection device proposed by the present invention Figure 1 ;

[0031] Figure 6 Technical reference principle of a temporary replacement platform for relay protection device proposed by the present invention Figure 2 .

[0032] In the figure: 1. Enclosed box structure; 2. Plug-in connection structure; 3. Rear wheel; 4. Front wheel; 5. Pull-out handle. DETAILED DESCRIPTION

[0033] The technical solution of this embodiment will be clearly and completely described below in conjunction with the drawings in this embodiment. Obviously, the described embodiment is only a part of this embodiment, rather than all of the embodiments.

[0034] Embodiment 1

[0035] Reference Figure 1-Figure 2 , a temporary replacement platform for relay protection devices, comprising:

[0036] The device exterior module is a closed box structure 1;

[0037] Install a power supply module, which is a DC power supply;

[0038] Acquisition terminal module, the acquisition terminal module is a test terminal;

[0039] Device connection module, the device connection module is a plug-in connection structure 2, based on an integrated panel, the voltage and current sampling part, the input part, and the output part are designed and integrated, and the two ends are equipped with secondary wires for plug-in access;

[0040] A mobile module, the mobile module comprises two rear wheels 3 and two front wheels 4;

[0041] Central controller for power control.

[0042] In this embodiment, the two rear wheels 3 and the two front wheels 4 are arranged at the bottom of the closed box structure 1, and the two front wheels 4 are composed of three wheels in a triangular structure, which is used for climbing stairs, etc.

[0043] In this embodiment, the central controller, the DC power supply, the test terminals and the plug-in connection structure 2 are all arranged in the closed box structure 1, and the plug-in connection structure 2 extends to the outside of the closed box structure 1.

[0044] In this embodiment, a pull-out handle 5 is provided on the front side of the closed box structure 1, which can be pulled out and retracted for use.

[0045] In this embodiment, the test terminal is used to realize non-stop replacement protection of the running line. The test terminal acts as a sliding metal part that transmits current. When switching, it only needs to loosen the screw and move the slider, and the switch position will be clear at a glance; test sockets are provided at both ends, and connection tests can be carried out by using corresponding test terminals.

[0046] Reference Figure 3 In this embodiment, the acquisition terminal module also includes:

[0047] Current and voltage acquisition unit, used to collect the original current and voltage;

[0048] The analysis and judgment unit is used to perform data analysis and judgment on the collected original current and voltage and transmit them to the control unit;

[0049] The regulating unit is used for regulating the current and voltage of the alternative output of the power module of the control device.

[0050] refer to Figure 5-Figure 6 In this embodiment, the main function of the relay protection device is to remove the faulty equipment from the system or send a signal in the shortest time when a fault occurs in the power system. During the protection replacement process, the protection device body must be withdrawn, otherwise if a fault occurs in the line at this time, it is very likely to trip at a higher level, thereby expanding the scope of power outage, which is the main reason for line power outage during the operation.

[0051] T (power outage time) = T (recovery time) + T (protection replacement time)

[0052] If a sideband device is used, there is no need to shut down the power supply during the entire operation, and the goal of shortening the power outage time to 0 is feasible.

[0053] Based on the bypass access design of the emergency power supply vehicle, the team used the same principle of DC charger bypass access, and also drew on the multi-module integrated design ideas of the multi-function transformer polarity tester. The team was able to design a platform that integrates power supply, sampling, and input and output functions to adapt to it. After access, it can ensure that the line can be replaced without power outages.

[0054] Reference Figure 4 In this embodiment, simulation test verification: After completing the technical demonstration, the relay protection training room conducts simulation test demonstration, and connects the temporary device without power outage. The steps are as follows:

[0055] Step 1. Select a DC charger, which uses a primary power source or a DC battery pack to provide DC input and outputs after DC / DC conversion;

[0056] Step 2. Connect the power supply of the replacement device, lead out the voltage and current of the tested line on the fault recorder screen in the training room and connect them to the replacement device, and at the same time connect the input and output lines of the device to the operating screen circuit;

[0057] Step 3. After the connection is completed, exit the protection device of the test screen. After 10 minutes, add the fault quantity with the relay protection tester to observe the action of the device. The action of the device is recorded in the following table after multiple tests before and after the connection:

[0058]

[0059] In summary, by using the "relay protection replacement platform" to access the operating line, the line can be replaced with a protection replacement without losing protection, thereby improving work efficiency.

[0060] Embodiment 2

[0061] In this embodiment, the closed box structure 1 is selected, and the Q235 steel required for the frame is selected; the stainless steel material is subjected to a load-bearing test (test range 10kg-15kg), and any deformation is observed, and the final load-bearing range of the frame is noted.

[0062] In this embodiment, a DC / DC direct current access module is manufactured, and a number of AC and DC circuit breakers required by the device are selected; 120% of the electrical quantity is added to the circuit breaker to observe whether its withstand voltage is qualified; the module is connected to a sampling device to observe whether its output accuracy is qualified.

[0063] In this embodiment, the test collection terminal module is installed, and the size of the test platform is determined according to the size information of the test instrument; a module base frame is made to ensure that the guide rails are fixed and multiple circuit breakers can be hung, and holes are reserved to ensure that they are connected to the main frame of the platform; the secondary wiring of the circuit breaker and the transfer terminal is completed and isolated; after assembly, an access test is carried out to ensure that the module access time is less than 15 minutes.

[0064] In this embodiment, a pluggable connection module is manufactured, and a module base frame is manufactured that can ensure the fixation of the guide rail and can hang multiple circuit breakers; corresponding pressure plates are configured according to the partition functions; an output test is carried out in conjunction with a sampling device to ensure that the output voltage and current error is less than 5%; after assembly, a simulated transmission test is carried out in conjunction with a simulated circuit breaker and a relay protection tester to ensure that the module is stable and reliable without safety risks.

[0065] In this embodiment, a wheeled module is manufactured, and the plate material is selected based on the three aspects of impact strength, temperature resistance and price; the device installation drawing is designed using CAD and cut and manufactured; and the wheeled box is carried out to perform a traveling work test.

[0066] In this embodiment, the integrated relay protection replacement platform is assembled and debugged as a whole, and a test platform is placed on it for transportation and other tests to verify its overall stability; the platform power module has sufficient power supply stability and is easy to install; it can promptly issue alarms or trip commands for various fault information.

[0067] The above description is only a preferred specific implementation manner of this embodiment, but the protection scope of this embodiment is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of this embodiment within the technical scope disclosed in this embodiment, and they should be covered by the protection scope of this embodiment.

Claims

1. A temporary replacement platform for relay protection device, characterized in that: include: The device exterior module is a closed box structure (1); Install a power supply module, which is a DC power supply; Acquisition terminal module, the acquisition terminal module is a test terminal; A device connection module, the device connection module is a plug-in connection structure (2); A mobile module, the mobile module comprises two rear wheels (3) and two front wheels (4); Central controller for power control.

2. A temporary replacement platform for relay protection devices according to claim 1, characterized in that: The two rear wheels (3) and the two front wheels (4) are arranged at the bottom of the closed box structure (1).

3. A temporary replacement platform for relay protection device according to claim 1, characterized in that: The two front wheels (4) are composed of three wheels combined to form a triangular structure.

4. A temporary replacement platform for relay protection devices according to claim 1, characterized in that: The central controller, the DC power supply, the test terminals and the plug-in connection structure (2) are all arranged in the closed box structure (1), and the plug-in connection structure (2) extends to the outside of the closed box structure (1).

5. A temporary replacement platform for relay protection device according to claim 1, characterized in that: A pull-out handle (5) is provided on the front side of the enclosed box structure (1).

6. A temporary replacement platform for relay protection devices according to claim 1, characterized in that: The test terminal is used to realize non-power-off replacement protection of the running circuit.

7. A temporary replacement platform for relay protection devices according to claim 1, characterized in that: The acquisition terminal module also includes: Current and voltage acquisition unit, used to collect the original current and voltage; The analysis and judgment unit is used to perform data analysis and judgment on the collected original current and voltage and transmit them to the control unit; The regulating unit is used for regulating the current and voltage of the alternative output of the power module of the control device.

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