An auxiliary device for regular inspection of standby automatic switching device

Abstract

The present invention discloses an auxiliary device for performing regular inspections on a standby automatic start-up device, comprising several analog switches, an open-loop module, a 24V DC power supply module, a first pluggable connector, a second pluggable connector, and a third pluggable connector. The first connection ends of the several analog switches are connected to the first pluggable connector; the second connection ends of the several analog switches are connected to the second pluggable connector; the third connection ends of the several analog switches are connected to the first connection end of the switch loop module; the second connection end of the switch loop module is connected to the third pluggable connector; and the 24V DC power supply module is used to provide the required working power to the analog switches and the open-loop module. The device is adaptable to standby automatic start-up devices of various manufacturers and models, effectively reduces the safety risks of on-site regular inspections of standby automatic start-up devices, and improves the efficiency of on-site regular inspections of standby automatic start-up devices.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection of power systems, and more particularly to an auxiliary device for performing regular inspection on a standby automatic switching device. Background Art

[0002] With the development and efficient application of power systems, improving the reliability and efficiency of power grids has become a crucial means of ensuring the steady development of the national economy. There are two general methods for improving power supply reliability: First, using a ring network can significantly improve reliability, but multi-level ring networks pose certain risks to system stability, making this approach less common in medium and low voltage power grids. Second, using multiple power sources can improve reliability, but can also introduce operational difficulties in relay protection coordination and other aspects. Therefore, the most widely used power supply method in medium and low voltage power grids is single-source power supply, which automatically switches to a backup power source in the event of a fault. This is also known as the automatic backup power supply.

[0003] To ensure that the standby automatic switching device can operate correctly, according to the inspection regulations, the relay protection professionals need to conduct regular inspections of the standby automatic switching device every three years. The standby automatic switching device is a safety automatic device. During regular inspections, the intervals involved in the standby switching rarely have a chance of power outages, so it is necessary to work without power outages. In order to meet the safety conditions and logic requirements of on-site operations, a lot of preliminary work needs to be done on-site, including isolating the current and voltage circuits, untying the tripping circuit wiring, and opening and closing circuit wiring. During the regular inspection of the standby automatic switching device, logic tests need to be performed, and to perform logic tests, it is necessary to provide tripping and closing circuits and opening and closing circuits. The current practice is to untie the tripping and closing circuits of the operating interval and the opening circuit of the switch position, and then use a simulated circuit breaker to simulate the tripping and closing coils and switch positions of the corresponding operating interval switches. After the test is completed, the secondary circuit measures are followed to connect back to the original position.

[0004] This testing method has the following disadvantages: 1. During the unwinding process, it is easy to untie the wrong wire, or due to the lack of proper safety measures, a short circuit may occur, causing the switch to trip inadvertently. 2. During the wiring process, it is easy to connect the wrong position. Since the switch is in operation, there is no way to verify the correctness of the wiring through a transmission test, which may cause the switch to refuse to operate. In addition, during the connection process, short circuits may occur due to insufficient safety measures, causing the switch to trip inadvertently. Therefore, it is not difficult to see that completing the relevant secondary safety measures required for the scheduled inspection of the backup automatic switching device is often high in safety risks and time-consuming, requiring a high level of technical skills and very inefficient. Summary of the Invention

[0005] In order to solve the problems that the current secondary safety measures required for completing the regular inspection of the standby automatic start-up device are very high in safety risks and time-consuming, require a high level of technical skills, and are very inefficient, the present invention provides an auxiliary device for regular inspection of the standby automatic start-up device. The auxiliary device can adapt to standby automatic start-up devices of various manufacturers and models, and effectively reduce the safety risks of on-site operations during the regular inspection of the standby automatic start-up device, and improve the work efficiency of on-site operations during the regular inspection of the standby automatic start-up device.

[0006] To achieve the above-mentioned object of the present invention, the technical solution adopted is as follows: an auxiliary device for performing regular inspection on a standby automatic switching device, comprising a plurality of analog switches, an open-circuit module, a 24V DC power supply module, a first pluggable connector, a second pluggable connector, and a third pluggable connector;

[0007] The first connection ends of the plurality of analog switches are all connected to the first pluggable connector;

[0008] The second connection ends of the plurality of analog switches are all connected to the second pluggable connector;

[0009] The third connection terminals of the plurality of analog switches are all connected to the first connection terminal of the switch loop module;

[0010] The second connection end of the switch circuit module is connected to the third pluggable connector;

[0011] The 24V DC power supply module is used to provide the required working power to the analog switch and the open-input loop module.

[0012] In specific applications, the auxiliary device also includes a box, a control panel, and the several analog switches, open-loop module, 24V DC power supply module, first pluggable connector, second pluggable connector, and third pluggable connector are all arranged on the control panel; the control panel is arranged inside the box, and when in use, the box is opened and the connector is connected to the standby automatic start-up device.

[0013] Preferably, the analog switch includes an indicator light circuit, a drive contact action circuit, and a circuit for externally connecting a test loop;

[0014] The power supply end of the indicator light circuit and the power supply end of the drive contact action circuit are connected to the 24V DC power supply module;

[0015] The output end of the driving contact action circuit is connected to the first pluggable connector;

[0016] The first end for the external test loop circuit is connected to the second pluggable connector;

[0017] The second end for externally connecting the test loop circuit is connected to the first connection end of the switch loop module.

[0018] Furthermore, the indicator light circuit includes a resistor R1, a resistor R2, a resistor R3, a light-emitting diode D1, a light-emitting diode D2, a light-emitting diode D3, a relay RL2A, a diode D4, a two-position relay RL1C, and a terminal P3;

[0019] One end of the resistor R1 is connected to the positive electrode of the 24V DC power supply module;

[0020] The other end of the resistor R1 is connected to the first pin of the two-position relay RL1C via the light-emitting diode D1;

[0021] One end of the resistor R2 is connected to the positive electrode of the 24V DC power supply module;

[0022] The other end of the resistor R2 is connected to the second pin of the two-position relay RL1C through the light-emitting diode D2;

[0023] The third pin of the two-position relay RL1C is grounded;

[0024] One end of the resistor R3 is connected to the positive electrode of the 24V DC power supply module;

[0025] The other end of the resistor R3 is connected to the first pin of the connection terminal P3 through the light emitting diode D3;

[0026] One end of the relay RL2A and the diode D4 connected in parallel is connected to the positive electrode of the 24V DC power supply module; the other end of the relay RL2A and the diode D4 connected in parallel is connected to the first pin of the wiring terminal P3;

[0027] The second pin of the line terminal P3 is grounded.

[0028] Furthermore, the light emitting diode D1 is a red LED lamp; the light emitting diode D2 is a green LED lamp; and the light emitting diode D3 is a yellow LED lamp.

[0029] Furthermore, the driving contact action circuit includes a connection terminal P1, a connection terminal P2, a relay RL1A, a relay RL1B, a diode D5, and a diode D6;

[0030] One end of the wiring terminal P1 is connected to the positive electrode of the 24V DC power module;

[0031] The other end of the wiring terminal P1 is connected to one end of the diode D5 and one end of the relay RL1A respectively;

[0032] The other end of the diode D5 and the other end of the relay RL1A are grounded;

[0033] One end of the terminal P2 is connected to the positive electrode of the 24V DC power module

[0034] The other end of the connection terminal P2 is connected to one end of the diode D6 and one end of the relay RL1B respectively;

[0035] The other end of the diode D6 and the other end of the relay RL1B are grounded;

[0036] One pin of the first pluggable connector is connected between the wiring terminal P1 and the relay RL1A;

[0037] The other pin of the second pluggable connector is connected between the wiring terminal P2 and the relay RL1B.

[0038] Furthermore, the circuit for the external test loop includes a two-position two-position relay RL1D and a two-position two-position relay RL2B;

[0039] The first pin of the two-position two-position relay RL1D and the first pin of the two-position two-position relay RL2B are both connected to one of the pins of the second pluggable connector;

[0040] The second pin of the two-position two-position relay RL1D is connected to one of the pins of the second pluggable connector;

[0041] The third pin of the two-position two-position relay RL1D is connected to one of the pins of the second pluggable connector;

[0042] The second pin of the two-position two-position relay RL2B is connected to one of the pins of the second pluggable connector.

[0043] Furthermore, the analog switch has 8 channels.

[0044] Furthermore, the open-in loop circuit is provided with a plurality of indicator lights; a relay is connected in series in each indicator light.

[0045] Furthermore, the indicator light is provided with 16 channels.

[0046] The beneficial effects of the present invention are as follows:

[0047] The present invention directly leads the tripping and closing output contacts, switch position contacts, and other input contacts of the backup automatic switching device through connectors, and then connects them to the auxiliary device of the present invention via connecting wires, without passing through a terminal block. The auxiliary device of the present invention is applicable to backup automatic switching devices of various manufacturers and models, while avoiding the safety risks associated with disconnecting the tripping and closing circuits during operating intervals and the input circuits for switch positions, effectively improving the safety and work efficiency of regular inspections of backup automatic switching devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic diagram of the analog switch described in Example 1.

[0049] Figure 2 yes Figure 1 The middle indicator light circuit is used for external test loop circuit.

[0050] Figure 3 yes Figure 1 The driving contact action circuit in.

[0051] Figure 4 This is a connection diagram showing an 8-way analog switch.

[0052] Figure 5 The figure is a schematic diagram showing the connection between an 8-way analog switch and a first pluggable connector and a second pluggable connector.

[0053] Figure 6 1 is a schematic diagram of the open-in loop circuit described in Example 1.

[0054] Figure 7 yes Figure 6 The connection diagram of 16 indicator lights.

[0055] Figure 8 yes Figure 7 Schematic diagram of the connection of the third pluggable connector. DETAILED DESCRIPTION

[0056] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] Example 1

[0058] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8As shown, an auxiliary device for performing regular inspection on a standby automatic switching device includes several analog switches, an open circuit module, a 24V DC power supply module, a first pluggable connector, a second pluggable connector, and a third pluggable connector;

[0059] The first connection ends of the plurality of analog switches are all connected to the first pluggable connector;

[0060] The second connection ends of the plurality of analog switches are all connected to the second pluggable connector;

[0061] The third connection terminals of the plurality of analog switches are all connected to the first connection terminal of the switch loop module;

[0062] The second connection end of the switch circuit module is connected to the third pluggable connector;

[0063] The 24V DC power supply module is used to provide the required working power to the analog switch and the open-input loop module.

[0064] In specific applications, the auxiliary device also includes a box, a control panel, and the several analog switches, open-loop module, 24V DC power supply module, first pluggable connector, second pluggable connector, and third pluggable connector are all arranged on the control panel; the control panel is arranged inside the box, and when in use, the box is opened and the connector is connected to the standby automatic start-up device.

[0065] In a specific embodiment, Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, the analog switch includes an indicator light circuit, a drive contact action circuit, and a circuit for external test loop;

[0066] The power supply end of the indicator light circuit and the power supply end of the drive contact action circuit are connected to the 24V DC power supply module;

[0067] The output end of the driving contact action circuit is connected to the first pluggable connector;

[0068] The first end for the external test loop circuit is connected to the second pluggable connector;

[0069] The second end for externally connecting the test loop circuit is connected to the first connection end of the switch loop module.

[0070] In a specific embodiment, Figure 2As shown, the indicator light circuit includes a resistor R1, a resistor R2, a resistor R3, a light-emitting diode D1, a light-emitting diode D2, a light-emitting diode D3, a relay RL2A, a diode D4, a two-position relay RL1C, and a terminal P3;

[0071] One end of the resistor R1 is connected to the positive electrode of the 24V DC power supply module;

[0072] The other end of the resistor R1 is connected to the first pin of the two-position relay RL1C via the light-emitting diode D1;

[0073] One end of the resistor R2 is connected to the positive electrode of the 24V DC power supply module;

[0074] The other end of the resistor R2 is connected to the second pin of the two-position relay RL1C through the light-emitting diode D2;

[0075] The third pin of the two-position relay RL1C is grounded;

[0076] One end of the resistor R3 is connected to the positive electrode of the 24V DC power supply module;

[0077] The other end of the resistor R3 is connected to the first pin of the connection terminal P3 through the light emitting diode D3;

[0078] One end of the relay RL2A and the diode D4 connected in parallel is connected to the positive electrode of the 24V DC power supply module; the other end of the relay RL2A and the diode D4 connected in parallel is connected to the first pin of the wiring terminal P3;

[0079] The second pin of the line terminal P3 is grounded.

[0080] This embodiment uses LED D1 to indicate the closed position, LED D2 to indicate the tripped position, and LED D3 to indicate the closed position. This embodiment employs a dual-position relay KG, which requires a reset signal after actuation. Closing circuits 1D1 to 1D4 are connected for actuation, while tripping circuits 1D1 to 1D2 are connected for reset. The closed position relay is provided by an HHJ holding relay, which actuates once with the HHA button and resets again with another press of the HHA button.

[0081] In a specific embodiment, the light emitting diode D1 is a red LED; the light emitting diode D2 is a green LED; and the light emitting diode D3 is a yellow LED. This embodiment uses lights of different colors for easy identification. This embodiment may also use light emitting diodes of other colors.

[0082] In a specific embodiment, Figure 3As shown, the driving contact action circuit includes a connection terminal P1, a connection terminal P2, a relay RL1A, a relay RL1B, a diode D5, and a diode D6;

[0083] One end of the wiring terminal P1 is connected to the positive electrode of the 24V DC power module;

[0084] The other end of the wiring terminal P1 is connected to one end of the diode D5 and one end of the relay RL1A respectively;

[0085] The other end of the diode D5 and the other end of the relay RL1A are grounded;

[0086] One end of the terminal P2 is connected to the positive electrode of the 24V DC power module

[0087] The other end of the connection terminal P2 is connected to one end of the diode D6 and one end of the relay RL1B respectively;

[0088] The other end of the diode D6 and the other end of the relay RL1B are grounded;

[0089] One pin of the first pluggable connector is connected between the wiring terminal P1 and the relay RL1A;

[0090] The other pin of the second pluggable connector is connected between the wiring terminal P2 and the relay RL1B.

[0091] It is used to manually drive the contact action. Other auxiliary inputs required during standby automatic switching and regular inspection can be freely controlled by driving the contact action circuit to meet the different needs of devices of different manufacturers and models.

[0092] In a specific embodiment, Figure 2 As shown, the circuit for external test loop includes a two-position two-position relay RL1D and a two-position two-position relay RL2B;

[0093] The first pin of the two-position two-position relay RL1D and the first pin of the two-position two-position relay RL2B are both connected to one of the pins of the second pluggable connector;

[0094] The second pin of the two-position two-position relay RL1D is connected to one of the pins of the second pluggable connector;

[0095] The third pin of the two-position two-position relay RL1D is connected to one of the pins of the second pluggable connector;

[0096] The second pin of the two-position two-position relay RL2B is connected to one of the pins of the second pluggable connector.

[0097] The auxiliary device of the present invention is connected to the standby automatic switching device by an external test loop circuit, thereby achieving the predetermined goal of the present invention.

[0098] In a specific embodiment, the analog switch has eight circuits. This embodiment has eight analog switches, requiring eight identical wiring sets. The eight-circuit opening and closing coils utilize latching relays, meaning they require a reset signal after actuation. The closing circuit engages the action circuit, while the tripping circuit engages the reset circuit.

[0099] In a specific embodiment, Figure 6 、 Figure 7 、 Figure 8 As shown, the open-in loop circuit is provided with a plurality of indicator lights, and a relay is connected in series to each indicator light. In a specific embodiment, the indicator lights are provided with 16 channels.

[0100] This open-input loop circuit is used to manually drive the contact action. Other auxiliary open-inputs required during automatic switching and regular inspection are freely controlled by driving the contact action circuit to meet the different needs of devices of different manufacturers and models.

[0101] The indicator light in this embodiment is used to show which contact is specifically opened, which is convenient for checking and verifying during regular inspection.

[0102] The control panel of the auxiliary device of the present invention is provided with buttons and indicator lights, and the switch position and the input and output quantities can be freely set; the tripping and closing output contacts, switch position contacts and other input contacts of the standby automatic switching device are mapped to these buttons and indicator lights.

[0103] The auxiliary device is provided with a connector for convenient plugging and unplugging of connecting wires, and the connector is connected to the tripping and closing output contacts, switch position contacts and other opening and input contacts of the standby automatic switching device through connecting wires.

[0104] Under the current situation where the relay protection team is understaffed, the turnover rate is fast, and the team's work tasks are heavy, the auxiliary device of the present invention can well solve the problem of insufficient team personnel arrangement, improve the level of on-site operation risk management and control, and reduce on-site operation risks. In addition to being promoted in the Guangdong power grid, the auxiliary device can also be promoted in the relay protection team of the Southern Power Grid and other units that need to maintain standby automatic switching devices.

[0105] The working principle of this embodiment is as follows: the external input circuit required for the regular inspection of the standby automatic switching device and the opening and closing circuit of the standby automatic switching device are directly provided through the device of the present invention, thereby meeting the logical opening and closing contacts required for the regular inspection of the standby automatic switching device. Specifically as follows: 1. The coil of the switch is provided by a holding relay. This project proposes to use a double-position relay KG so that the closing coil and the opening coil share a relay, saving a relay; 2. The position of the switch is provided by the auxiliary contacts of the double-position relay, which can well reflect the position of the switch; 3. The post-closing relay is provided by an HHJ holding relay, which can reflect the post-closing position after the switch is manually closed. 4. Other openings are simulated through other relays, such as the opening of the locking standby automatic switching device. 5. These relays and contacts are directly connected to the corresponding positions of the standby automatic switching protection device through connecting lines, thereby achieving the predetermined goals of this project.

[0106] Obviously, the above embodiments of the present invention are merely examples for the purpose of illustrating the present invention, and are not intended to limit the embodiments of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An auxiliary device for regular inspection of a standby automatic start-up device, characterized by: It includes several analog switches, an open loop module, a 24V DC power supply module, a first pluggable connector, a second pluggable connector, and a third pluggable connector; The first connection ends of the plurality of analog switches are all connected to the first pluggable connector; The second connection ends of the plurality of analog switches are all connected to the second pluggable connector; The third connection terminals of the plurality of analog switches are all connected to the first connection terminal of the switch loop module; The second connection end of the switch circuit module is connected to the third pluggable connector; The 24V DC power supply module is used to provide the required working power to the analog switch and the open loop module; The analog switch includes an indicator light circuit, a drive contact action circuit, and a circuit for externally connecting a test loop; The power supply end of the indicator light circuit and the power supply end of the drive contact action circuit are connected to the 24V DC power supply module; The output end of the driving contact action circuit is connected to the first pluggable connector; The first end for the external test loop circuit is connected to the second pluggable connector; The second end for externally connecting the test loop circuit is connected to the first connection end of the switch loop module; The indicator light circuit includes a resistor R1, a resistor R2, a resistor R3, a light-emitting diode D1, a light-emitting diode D2, a light-emitting diode D3, a relay RL2A, a diode D4, a two-position relay RL1C, and a terminal P3; One end of the resistor R1 is connected to the positive electrode of the 24V DC power supply module; The other end of the resistor R1 is connected to the first pin of the two-position relay RL1C via the light-emitting diode D1; One end of the resistor R2 is connected to the positive electrode of the 24V DC power supply module; The other end of the resistor R2 is connected to the second pin of the two-position relay RL1C through the light-emitting diode D2; The third pin of the two-position relay RL1C is grounded; One end of the resistor R3 is connected to the positive electrode of the 24V DC power supply module; The other end of the resistor R3 is connected to the first pin of the connection terminal P3 through the light emitting diode D3; One end of the relay RL2A and the diode D4 connected in parallel is connected to the positive electrode of the 24V DC power supply module; the other end of the relay RL2A and the diode D4 connected in parallel is connected to the first pin of the wiring terminal P3; The second pin of the line terminal P3 is grounded; The driving contact action circuit includes a connection terminal P1, a connection terminal P2, a relay RL1A, a relay RL1B, a diode D5, and a diode D6; One end of the wiring terminal P1 is connected to the positive electrode of the 24V DC power module; The other end of the wiring terminal P1 is connected to one end of the diode D5 and one end of the relay RL1A respectively; The other end of the diode D5 and the other end of the relay RL1A are grounded; One end of the terminal P2 is connected to the positive electrode of the 24V DC power module The other end of the connection terminal P2 is connected to one end of the diode D6 and one end of the relay RL1B respectively; The other end of the diode D6 and the other end of the relay RL1B are grounded; One pin of the first pluggable connector is connected between the wiring terminal P1 and the relay RL1A; The other pin of the second pluggable connector is connected between the wiring terminal P2 and the relay RL1B; The circuit for external test loop includes a two-position two-position relay RL1D and a two-position two-position relay RL2B; The first pin of the two-position two-position relay RL1D and the first pin of the two-position two-position relay RL2B are both connected to one of the pins of the second pluggable connector; The second pin of the two-position two-position relay RL1D is connected to one of the pins of the second pluggable connector; The third pin of the two-position two-position relay RL1D is connected to one of the pins of the second pluggable connector; The second pin of the two-position two-position relay RL2B is connected to one of the pins of the second pluggable connector; The auxiliary device also includes a box and a control panel. The several analog switches, open-loop module, 24V DC power supply module, first pluggable connector, second pluggable connector, and third pluggable connector are all arranged on the control panel; the control panel is arranged inside the box.

2. The auxiliary device for performing regular inspection on the standby automatic start-up device according to claim 1, characterized in that: The light emitting diode D1 is a red LED lamp; the light emitting diode D2 is a green LED lamp; and the light emitting diode D3 is a yellow LED lamp.

3. The auxiliary device for performing regular inspection on the standby automatic start-up device according to claim 2, characterized in that: The analog switch is provided with 8 channels.

4. The auxiliary device for performing regular inspection on the standby automatic start-up device according to claim 3, characterized in that: The open-circuit module is provided with a plurality of indicator lights; a relay is connected in series in each indicator light.

5. The auxiliary device for performing regular inspection on the standby automatic start-up device according to claim 4, characterized in that: The indicator lights are provided with 16 channels.

6. The auxiliary device for performing regular inspection on the standby automatic start-up device according to claim 5, characterized in that: The first pluggable connector, the second pluggable connector, and the third pluggable connector all use 32-hole aviation connectors.

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