Multi-bus wiring protection device calibrator

Abstract

The invention discloses a multi-bus wiring protection device calibrator, which relates to the technical field of electric power engineering, and comprises 13 branches connected with a bus, namely a bus coupler, a main transformer 1, a main transformer 2 and lines 1-10, and further comprises a magnetic latching relay CBJ, a light-emitting diode, a reset button FA, a current-limiting resistor R and a panel, according to the multi-bus wiring protection device calibrator, each branch on a panel is provided with two small switches for displaying the running bus where each branch is located, and when the multi-bus wiring protection device calibrator is used for checking the bus protection device, high-voltage circuit breakers of the branches or a plurality of analog circuit breakers do not need to be connected into the bus protection device, so that the operation is convenient, and the operation is convenient. The secondary wiring is simple and convenient, the operation is flexible, the service life of the high-voltage circuit breaker is facilitated, and particularly when the bus protection device is replaced under the condition that each branch is in a running state, the device is more flexible and more practical when being used for assisting in checking the bus protection device.

Description

Technical Field

[0001] The invention relates to the technical field of electric power engineering, in particular to a multi-busbar wiring protection device checker. Background Art

[0002] In the power system, the busbar is one of the important components of the substation. Its function is to concentrate, distribute and transmit electric energy. If the busbar fails and is not removed correctly and quickly, it will cause a large-scale power outage, or even more seriously, damage to the power equipment and the collapse of the system. Therefore, the busbar must be equipped with a safe and reliable busbar protection device that can quickly and accurately remove the fault, so as to ensure the safe and reliable operation of the busbar. As an important protection device for the busbar, the busbar protection device must be put into operation after all circuits and functions are tested correctly in accordance with the power industry standard "DL-T 995-2006 Inspection Procedures for Relay Protection and Grid Safety Automatic Devices".

[0003] In order for the busbar protection device to realize its function, in addition to connecting the voltage of each section of the busbar and the current of each branch connected to the busbar (such as busbar coupling, main transformer 1, main transformer 2, line 1, line 2, ...), the auxiliary contacts of the isolating knife switches of each branch connected to the busbar must be opened into the busbar protection device. Its function is to identify the operating busbar where the branch is located, so as to finally realize the tripping exit of each branch of the busbar protection device, thereby tripping the circuit breakers of each branch. Therefore, when inspecting the busbar protection device, the voltage and current can be connected by the relay protection test bench, and the auxiliary contacts of the isolating knife switches of each branch connected to the busbar can be realized by the knife switch position simulation panel that comes with the busbar protection device.

[0004] However, it is obviously unrealistic and unscientific to connect the high-voltage circuit breakers of each branch or multiple simulated circuit breakers to the busbar protection device. In this case, the secondary wiring is too complicated, the operation is not flexible, the inspection efficiency is too low, and the circuit breakers are opened and closed multiple times without utilizing their service life. Especially when the busbar protection device is replaced when each branch is in operation, it is even more impossible to connect the high-voltage circuit breakers of each branch to the busbar protection device. Therefore, it is necessary to design and invent a "multi-busbar wiring protection device verifier" to simulate the auxiliary contacts of the isolation knife switches of each branch as a means of indicating the operating busbar where each branch is located, and to simulate the circuit breakers of each branch as a tripping outlet display of the busbar protection device, so as to achieve the purpose of auxiliary inspection of whether the circuit and function of the busbar protection device are correct. When the auxiliary device is used to inspect the busbar protection device, the efficiency of the busbar protection inspection can be greatly improved, and the power outage maintenance time can be effectively shortened, thereby ensuring the reliability and continuity of power supply, with obvious economic and social benefits.

[0005] When conducting the inspection of the bus protection device, the auxiliary contacts of the isolating switches of each branch connected to the bus can be realized by the bus position simulation panel built in the bus protection device. However, it is obviously unrealistic and unscientific to connect the high-voltage circuit breakers of each branch or multiple simulated circuit breakers to the bus protection device. In this case, the secondary wiring is too complicated, the operation is not flexible, the inspection efficiency is too low, and the frequent opening and closing of the circuit breakers is not conducive to their service life. Especially when replacing the bus protection device when each branch is in the operating state, it is even more impossible to connect the high-voltage circuit breakers of each branch to the bus protection device. Therefore, it is necessary to design and invent a "bus protection inspection auxiliary device" to simulate the auxiliary contacts of the isolating switches of each branch for use as the input of the bus protection device, and simulate the circuit breakers of each branch for use as the display of the trip outlet of the bus protection device, so as to achieve the purpose of assisting in inspecting whether the circuit and function of the bus protection device are correct.

[0006] For this reason, a multi-bus connection protection device calibrator is proposed to solve the above problems. Summary of the Invention

[0007] The present invention provides a multi-bus connection protection device calibrator, which tests the correctness and reliability of the bus protection device by simulating the operating states of different branches, ensuring that the power system can effectively prevent power outages and equipment damage caused by faults during actual operation, so as to solve the problems in the background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: A multi-bus connection protection device calibrator includes 13 branches connected to the designed bus, namely the bus coupler, main transformer 1, main transformer 2, and lines 1-10; to meet the requirements of bus protection calibration. It further includes a magnetic latching relay CBJ, a light-emitting diode, a reset button FA, a current-limiting resistor R, and a panel. The DC 220V power supply is connected from the power supply of the bus device and controlled by a DC air switch DK. Two small switches are respectively configured for each branch on the panel to display the operating bus where each branch is located. The operation process of this device is as follows: S1. Wiring at both ends of the outlet contact: Connect the trip outlet contacts of each branch of the bus protection device to the common end and the jacks of each branch from 1 to 13 of the device. S2. Turn on the main power switch: The small switches of the isolating switches of each branch correspond to them one by one, connect to the 220V DC power supply and connect the air switch. S3. Measure the voltage at the outlet. S4. After the bus protection device operates, observe the state of the light-emitting diode. S5. If the diode is in the extinguished state, it means that the outlet contact has not operated; if the diode is in the lit state, it means that the outlet contact has operated; it plays an auxiliary role in inspecting the bus protection.

[0009] Further, in step S2: according to the operating bus where the disconnector position simulation panel of the bus protection device is located, the branch disconnector small switches of the device are correspondingly connected to it one by one, and then the air switches are connected.

[0010] Further, in step S4: after the bus protection device operates, after its trip outlet contacts TJM, TJT, and TJL are selectively closed according to the protection operation logic, the operating coils of the corresponding magnetic latching relays CBJ(1 - 13) operate.

[0011] Further, in step S5: its normally open contact CBJ closes, and the light - emitting diode XSD lights up; When the reset button FA is pressed, the reset coil of the magnetic latching relay CBJ operates; Its normally open contact CBJ opens, and the light - emitting diode XSD goes out, thus playing a role in assisting the inspection of the bus protection.

[0012] Further, the panel includes a light - emitting diode, a bus protection outlet contact jack, an auxiliary display disconnector small switch, a DC power supply jack, a DC air switch, and a reset button.

[0013] Further, 13 light - emitting diodes are provided, and the bus protection outlet contact jacks are arranged in 13 common - end groups.

[0014] Further, the bus protection device is the basis of the entire detection device and is used to generate action instructions; the trip outlet contact is used to receive the action instructions of the bus protection device, the disconnector position simulation panel is used to simulate the bus state in actual operation, and the branch jack provides an interface for further connecting the simulation scenario.

[0015] Further, the branch disconnector small switch is used to simulate the switch state in the actual circuit, and the air switch turns on the load when the power supply is connected.

[0016] Further, the magnetic latching relay acts according to the logic and maintains the working state, the light - emitting diode indicates the unique behavior of each branch, and the reset button is used for device reset and indicator light extinguishing operations.

[0017] Further, the DC air switch DK is used to control the safe access and disconnection of the power supply; 13 magnetic latching relays CBJ are used to control the power flow of each branch, simulate the state of the actual power system, the current - limiting resistor R is used to limit the current and protect the safe operation of the protection device and other equipment, and the switch panel is the control interface of the whole set of devices. Users control the working states of each component through the switches on the panel, forming each branch of the detection. Compared with the prior art, the present invention provides a checker for multi - bus connection protection devices, having the following beneficial effects: When using this multi-bus connection protection device checker to test the bus protection device, it is not necessary to connect each branch high-voltage circuit breaker or multiple simulated circuit breakers to the bus protection device. The secondary wiring is simple, the operation is flexible, and it is beneficial to the service life of the high-voltage circuit breaker. Especially when replacing the bus protection device with each branch in the operating state, using this device to assist in testing the bus protection device is more flexible and practical. Therefore, it can greatly improve the efficiency of bus protection testing, effectively shorten the power outage maintenance time, thus ensuring the reliability and continuity of power supply, and the economic and social benefits are obvious.

[0018] The produced multi-bus connection protection device checker ensures the normal operation of the protection device; reduces the possibility of mis-tripping of the protection; eliminates potential equipment safety hazards, saves human capital; and improves work efficiency. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the operation process of a multi-bus connection protection device checker of the present invention; Figure 2 It is a schematic diagram of the panel circuit layout of a multi-bus connection protection device checker of the present invention; Figure 3 It is a schematic diagram of the panel layout of a multi-bus connection protection device checker of the present invention; Figure 4 It is a schematic diagram of the electrical principle of a multi-bus connection protection device checker of the present invention.

[0021] In the figure: 1. Light-emitting diodes (1-13); 2. Bus protection outlet contact jacks (common end, 1-13 groups); 3. Auxiliary display disconnecting switch; 4. DC power supply jack; 5. DC air switch; 6. Reset button.

[0022] DK - DC air switch; TJM - Bus protection tripping the bus-tie contact; TJT(1-2) - Bus protection tripping the main transformer outlet contact; TJL(1-10) - Bus protection tripping the line outlet contact; CBJ(1-13) - Magnetic latching relay and its normally open contacts; XSD(1-13) - Light-emitting diodes; FA - Reset button. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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 is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] See also Figures 1-4 As shown, the present invention discloses a multi-busbar wiring protection device verifier, which is designed for 13 branches connected to the bus, namely, bus tie, main transformer 1, main transformer 2, and lines 1-10, to meet the busbar protection verification requirements. The device is mainly composed of 13 magnetic latching relays CBJ, 13 light-emitting diodes XSD, a reset button FA and multiple current-limiting resistors R. A DC 220V power supply can be connected to the busbar device power supply and controlled by a DC air switch DK. In addition, each branch on the panel is respectively configured with two small switches to display the operating busbar where each branch is located.

[0027] The operation process of the device is as follows: connect the tripping output contacts of each branch of the busbar protection device to the common end of the device and the 1-13 branch sockets. According to the operating bus where the knife switch of the busbar protection device is located, the small switches of each branch knife switch of the device are matched one by one. The device is connected to a 220V DC power supply and an air switch. After the busbar protection device is activated, its tripping output contacts TJM, TJT (1-2), and TJL (1-10) are selectively closed according to the protection action logic, and the corresponding magnetic latching relay CBJ (1-13) action coils are activated, and its normally open contact CBJ (1-13) is closed, and the light-emitting diode XSD (1-13) is lit. When the reset button FA is pressed, the reset coil of the magnetic latching relay CBJ (1-13) is activated, and its normally open contact CBJ (1-13) is opened, and the light-emitting diode XSD (1-13) is extinguished, thereby assisting in the inspection of the busbar protection device.

[0028] The device uses a set of combinational circuits, including magnetic latching relays and light-emitting diodes, to simulate the operating states of different branches. There are small switches for branch circuits on the switch panel, and users can control these small switches to simulate the working conditions of each branch. Whenever a new state is simulated, the flow of electricity is changed by controlling the magnetic latching relays, and the light-emitting diodes will display the current simulated conditions on the panel, thus helping to complete the verification of the bus protection device.

[0029] DC 220V power supply: Provides stable power supply for the entire device.

[0030] DC air switch DK: Controls the safe access and disconnection of the power supply.

[0031] 13 magnetic latching relays CBJ: Control the power flow of each branch and simulate the state of the actual power system.

[0032] 13 light-emitting diodes XSD: Display the operating states on each branch on the console.

[0033] Reset button FA: Used to restart the entire verification process or protect disconnection and restore the normal state.

[0034] Current-limiting resistor R: Used to limit the current and protect the safe operation of the device and other equipment.

[0035] Switch panel: Is the control interface of the entire device. Users can control the working states of each component through the switches on the panel to form each branch for detection.

[0036] The purpose of this application is to provide an auxiliary tool that can safely, conveniently and reliably detect the action logic of the bus protection device. By simulating the protection operations in actual operation, problems can be discovered in time and debugging can be carried out to ensure the safe operation of the power system.

[0037] The usage method is as follows: Connect the trip outlet contacts of each branch and the small switch of the disconnecting switch; Connect the 220V DC power supply and close the air switch; Set the simulated bus situation with the disconnecting switch position simulation panel according to the actual situation; Disconnect the small switches of the disconnecting switches of each branch to simulate the disconnection of each branch; Confirm that the bus protection device starts; Observe the action conditions of the relevant contacts and relays of each branch according to the protection logic.

[0038] Working principle: Through the given voltage input, trigger the relays and relevant outlet contacts in the bus protection device, and control the magnetic latching relays and light-emitting diodes under the conditions set by the protection logic.

[0039] Working process: After the bus protection device is started, its protection action logic causes the trip outlet contacts TJM, TJT (1-2) and TJL (1-10) to close according to the preset logic, driving the coils of the corresponding magnetic latching relays CBJ (1-13) to act, and then making their normally open contacts close and lighting up the light-emitting diode XSD (1-13). When the reset button FA is pressed, the reset coil of the magnetic latching relay CBJ (1-13) is energized, the normally open contact opens, and the light-emitting diode XSD (1-13) goes out.

[0040] Movement process: When the bus protection device operates, the operating coils of the relevant magnetic latching relays CBJ (1-13) are activated, and then the normally open contacts close, lighting up the light-emitting diode XSD (1-13). When the reset button is pressed, the reset coil of the magnetic latching relay acts, the normally open contact opens, and the light-emitting diode goes out.

[0041] This device is mainly used to detect whether the bus protection device operates as expected. Through a simple circuit connection, the trip outlet contacts of each branch of the bus protection device are connected, a simulation panel is set up to simulate the bus situation, and the disconnecting switch small switches of each branch are connected to match the actual connection lines. Then, by turning on the power supply, simulating the bus protection contacts, triggering the action of the internal logic relay, making the corresponding magnetic latching relay act and lighting up the indicator light. The whole process does not need to be actually put into the power system and can be controlled and repeated in the laboratory environment. When the bus protection contacts are activated, the device first closes the internal relay and then lights up the indicator light. If any branch does not operate as expected, the problem can be directly found by observing that the corresponding indicator light does not light up.

[0042] Bus protection device: It is the basis of the whole detection device and generates action instructions.

[0043] Trip outlet contact: Used to receive the action instructions of the bus protection device.

[0044] Disconnecting switch position simulation panel: Simulates the bus state in actual operation.

[0045] Branch jack: Provides an interface for further connecting the simulation scenario.

[0046] Branch disconnecting switch small switch: Simulates the switch state in the actual circuit.

[0047] 220V DC power supply: Provides the necessary power for the device.

[0048] Air switch: Turns on the load when accessing the power supply.

[0049] Magnetic latching relay (CBJ): Acts according to the logic and maintains the working state.

[0050] Light-emitting diode (XSD): Indicates the unique behavior of each branch.

[0051] Reset button (FA): Used for device reset and indicator light extinguishing operations.

[0052] Through this device, it is possible to quickly and accurately detect the trip outlet actions of each branch, facilitating the accurate identification of the faulty branch location. By simulating the protection logic in the actual working environment, the device triggers the action of the magnetic latching relay. If the protection device operates according to the correct logic, the relay will close and the light-emitting diode will light up; otherwise, it will not, visually displaying the fault situation.

[0053] By connecting the trip outlet contact of the protection device to the experimental device and using the magnetic latching relay to maintain the state, when the protection operates, the indicator light (XSD) is lit; the abnormal situation is directly displayed through an intuitive indicator (light-emitting diode), thus quickly identifying the problem.

[0054] In summary, for this multi-busbar connection protection device checker, when using this device to test the busbar protection device, it is not necessary to connect each branch high-voltage circuit breaker or multiple simulated circuit breakers to the busbar protection device. The secondary wiring is simple, the operation is flexible, and it is beneficial to the service life of the high-voltage circuit breaker. Especially when replacing the busbar protection device with each branch in the operating state, using this device to assist in testing the busbar protection device is more flexible and practical. Therefore, it can greatly improve the efficiency of busbar protection testing, effectively shorten the power outage maintenance time, thereby ensuring the reliability and continuity of power supply, and the economic and social benefits are obvious.

[0055] The manufactured multi-busbar connection protection device checker ensures the normal operation of the protection device; reduces the possibility of incorrect protection tripping; eliminates potential equipment safety hazards, saves human capital; and improves work efficiency.

[0056] The logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in combination with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device.

[0057] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection (electronic device) having one or more wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable media can even be paper or other suitable media on which a program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing as necessary, and then storing it in a computer memory.

[0058] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one or a combination of the following techniques well-known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A multi-busbar wiring protection device checker, characterized in that: Including the 13 branches connected to the design bus, namely bus tie, main transformer 1, main transformer 2, lines 1-10; It also includes a magnetic latching relay CBJ, a light-emitting diode, a reset button FA, a current-limiting resistor R and a panel. The DC 220V power supply is connected to the bus device power supply and controlled by the DC air switch DK. Each branch on the panel is equipped with two small switches to display the operating bus of each branch. The operation process of the device is as follows: S1, wiring at both ends of the outlet contact: connect the trip outlet contacts of each branch of the busbar protection device to the common end of the device and the 1-13 branch sockets; S2, turn on the main power switch: each branch knife switch small switch corresponds to it one by one, connect to the 220V DC power supply and connect to the air switch; S3, measure the voltage at the outlet; S4. After the busbar protection device is activated, observe the status of the light-emitting diode; S5. If the diode is off, it means the output contact is not working; if the diode is on, it means the output contact is working.

2. A multi-busbar wiring protection device checker according to claim 1, characterized in that: In the step S2: according to the operating bus where the knife switch of the bus protection device is located, the small switches of each branch knife switch of the device are matched one by one with the knife switch position simulation disk, and then the air switch is connected.

3. A multi-busbar wiring protection device checker according to claim 2, characterized in that: In the step S4: after the busbar protection device is actuated, its tripping output contacts TJM, TJT, and TJL are selectively closed according to the protection action logic, and the corresponding magnetic latching relay CBJ action coils are actuated.

4. A multi-busbar wiring protection device checker according to claim 3, characterized in that: In step S5: the normally open contact CBJ is closed and the light emitting diode XSD is lit; When the reset button FA is pressed, the reset coil of the magnetic latching relay CBJ is activated; Its normally open contact CBJ opens and the light-emitting diode XSD goes out, thus serving as an auxiliary test for busbar protection.

5. A multi-busbar wiring protection device checker according to claim 4, characterized in that: The panel includes a light emitting diode, a busbar protection outlet contact socket, an auxiliary display knife switch, a DC power socket, a DC air switch and a reset button.

6. A multi-busbar wiring protection device checker according to claim 5, characterized in that: There are 13 light emitting diodes, and the busbar protection outlet contact jacks are arranged as 13 groups of common ends.

7. A multi-busbar connection protection device checker according to claim 6, characterized in that: The busbar protection device is the basis of the entire detection device and is used to generate action instructions; the tripping output contact is used to receive the action instructions of the busbar protection device; The switch position simulation panel is used to simulate the busbar status in actual operation, and the branch jack provides an interface for further connecting simulation scenarios.

8. A multi-busbar wiring protection device checker according to claim 7, characterized in that: The branch circuit breaker small switch is used to simulate the switch state in the actual circuit; The air switch turns on the load when the power is connected.

9. The multi-busbar wiring protection device checker according to claim 1, characterized in that: The magnetic latching relay operates according to logic and maintains the working state; LEDs indicate the unique behavior of each branch; The reset button is used to reset the device and turn off the indicator light.

10. The multi-busbar connection protection device checker according to claim 1, characterized in that: The DC air switch DK is used to control the safe connection and disconnection of the power supply; 13 magnetic latching relays CBJ are used to control the power flow of each branch, simulating the state of the actual power system; The current limiting resistor R is used to limit the current and protect the safe operation of devices and other equipment; The switch panel is the control interface of the whole device. The user controls the working status of each component through the switches on the panel to form each branch of the detection.

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