Electric handcart control module for intelligent substation

Abstract

An electric handcart control module for an intelligent substation comprises a front panel, the front panel is electrically connected with a controller at the rear end, the controller is provided with an external terminal strip, the external terminal strip is used for being connected with a handcart motor and being connected with a remote control signal and an interlocking signal, the external terminal strip is provided with a communication terminal strip H1, and the communication terminal strip H1 is electrically connected with the controller. And the communication terminal strip H1 is used for sending a state signal of the electric handcart to a remote place. A local control signal and a remote control signal are acquired by adopting the MCU control chip, remote display or body control display and current state display of the handcart are carried out through the indicating lamp, and the current state and control state of the handcart can be transmitted to a remote position for a digital platform to use through the communication chip.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent power substation, in particular to an electric trolley control module used in an intelligent power substation. Background Art

[0002] In the power system, substations are key nodes for power transmission and distribution. The safety and efficiency of their operation directly affect the stability and economy of the entire power grid. In existing substations, electric handcarts, as a common operating device, are widely used for the transportation and installation of various electrical equipment (such as switch cabinets, transformers, etc.). However, the traditional electric handcart operation method has obvious limitations, which are mainly reflected in the following aspects:

[0003] On-site manual operation: Traditional electric trolleys are usually operated manually on-site, which requires the operator to go directly to the location of the electric trolley and control the movement of the trolley through physical means (such as operating handles, buttons, etc.). This operation method is not only inefficient, but also may pose a threat to the safety of the operator in certain circumstances (such as bad weather, equipment failure, etc.).

[0004] Unable to remotely control: Due to the lack of remote communication and control technology, existing electric handcarts cannot be remotely controlled. This means that when the handcart needs to be operated, no matter where the operator is, he must go to the site in person to operate. This not only increases the operating cost, but also reduces the flexibility and convenience of operation.

[0005] Condition monitoring and communication interface limitations: Current electric trolley designs often overlook the importance of condition monitoring and communication interfaces. Even if some trolleys have certain condition monitoring functions, they are usually limited to local display and cannot send status information to remote locations through communication interfaces. This leads to difficulties in remote monitoring and fault diagnosis, making the operation and maintenance management of substations complicated and inefficient.

[0006] The current power grid is implementing a 3D digital platform for substations, mirroring the equipment in the substation in a 1:1 manner and mapping it to the virtual platform. At the same time, the status and switch signals of the components need to be mapped to the model. However, the defects of the electric trolleys mentioned above have hindered the development of the 3D digital platform and cannot meet the needs of modern power systems for efficient, safe and intelligent operation and maintenance. Summary of the invention

[0007] The technical problem to be solved by the utility model is to provide an electric trolley control module for an intelligent substation, which can solve the above-mentioned problems and realize remote control, status monitoring and communication interface functions. It is of great significance to improve the operation and maintenance management level of the substation, reduce the operation and maintenance costs, and enhance the safety and stability of the power grid, and provide convenience for the implementation of the digital platform of the substation.

[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0009] An electric trolley control module for an intelligent substation comprises a front panel, which is electrically connected to a rear-end controller. The controller is provided with an external terminal block, which is used to connect to a trolley motor and to connect to a remote control signal and an interlocking signal. The external terminal block is provided with a communication terminal block H1, which is used to send a status signal of the electric trolley to a remote location.

[0010] The above-mentioned front panel is provided with an indicator light group and control buttons. The indicator light group includes a power indicator light LED1, a ready indicator light LED2, a remote indicator light LED3, a working position indicator light LED4, a test position indicator light LED5 and a fault indicator light LED6. The control buttons include a reset button S1, a rock-in button S2 and a rock-out button S3. The indicator light group is electrically connected to the output end of the controller, and the control buttons are electrically connected to the input end of the controller.

[0011] The above-mentioned external terminal blocks include power terminals L and N, motor terminals M+ and M-, fault output terminals A1 and A2, local / remote control terminals L / F, remote reset terminal FRES, circuit breaker interlock terminal LK1, ground switch interlock terminal LK2, standby interlock terminal LK3, remote swing-in terminal FFW, remote swing-out terminal FBW, working position terminal WP, test position terminal TP, common terminal COM and communication terminal block H1.

[0012] The above-mentioned controller is equipped with a power conversion circuit, an MCU chip U10 and a communication chip U6. The communication chip U6 is communicatively connected to the MCU chip U10, the communication chip U6 is electrically connected to the communication terminal block H1, the indicator light group is electrically connected to the output end of the MCU chip U10, and the control button is electrically connected to the input end of the MCU chip U10.

[0013] The above-mentioned motor terminals M+ and M- are connected to the trolley motor M, the motor terminals M+ and M- are electrically connected to the motor driver D1 in the controller, and the motor driver D1 is electrically connected to the output end of the MCU chip U10.

[0014] The above-mentioned fault output terminals A1 and A2 are electrically connected to the two ends of the normally open switch of the fault relay K1. One end of the relay coil of the fault relay K1 is connected to the output end of the MCU chip U10, and the other end is connected to the ground wire GND. The normally open switch of the fault relay K1 is also connected to the fault control circuit to control the fault indicator LED6.

[0015] The above-mentioned power conversion circuit includes a rectifier bridge D1-D4 connected to the power terminals L and N, the output end of the rectifier bridge D1-D4 is connected to the power chip U2, the power chip U2 outputs 24V power, the output end of the power chip U2 is connected to the power chip U7, and the power chip U7 outputs 5V power.

[0016] The utility model provides an electric trolley control module for an intelligent substation. The MCU control chip is adopted to collect local control signals and remote control signals, and the remote or main body control and the current state of the trolley are displayed through indicator lights. The current trolley state and control state can also be transmitted to a remote location for use by a digital platform through a communication chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the control module of the utility model;

[0019] Figure 2 is a schematic diagram of the front panel;

[0020] Figure 3 This is a schematic diagram of the external terminal block;

[0021] Figure 4 This is a schematic diagram of the connection of the control chip in the controller;

[0022] Figure 5 This is a schematic diagram of the communication chip connection in the controller;

[0023] Figure 6 Schematic diagram of power conversion circuit.

[0024] In the figure: front panel 1, controller 2, external terminal block 3, power indicator LED1, ready indicator LED2, remote indicator LED3, working position indicator LED4, test position indicator LED5, fault indicator LED6, reset button S1, swing-in button S2, swing-out button S3, power terminals L and N, motor connection terminals M+ and M-, fault output terminals A1 and A2, local / remote control terminals L / F, remote reset terminal FRES, circuit breaker interlock terminal LK1, ground knife interlock terminal LK2, spare interlock terminal LK3, remote swing-in terminal FFW, remote swing-out terminal FBW, working position terminal WP, test position terminal TP, common terminal COM, communication terminal block H1, MCU chip U10, motor drive D1, fault relay K1, communication chip U6, trolley motor M. DETAILED DESCRIPTION

[0025] like Figure 1-6 As shown in the figure, an electric trolley control module for a smart substation includes a front panel 1, which is electrically connected to a controller 2 at the rear end. The controller 2 is provided with an external terminal block 3, which is used to connect to the trolley motor and to connect to a remote control signal and an interlocking signal. The external terminal block 3 is provided with a communication terminal block H1, which is used to send the status signal of the electric trolley to a remote location.

[0026] The above-mentioned front panel 1 is provided with an indicator light group and control buttons. The indicator light group includes a power indicator light LED1, a ready indicator light LED2, a remote indicator light LED3, a working position indicator light LED4, a test position indicator light LED5 and a fault indicator light LED6. The control buttons include a reset button S1, a rock-in button S2 and a rock-out button S3. The indicator light group is electrically connected to the output end of the controller 2, and the control buttons are electrically connected to the input end of the controller 2.

[0027] The above-mentioned external terminal block 3 includes power terminals L and N, motor connection terminals M+ and M-, fault output terminals A1 and A2, local / remote control terminals L / F, remote reset terminal FRES, circuit breaker interlock terminal LK1, ground switch interlock terminal LK2, spare interlock terminal LK3, remote swing-in terminal FFW, remote swing-out terminal FBW, working position terminal WP, test position terminal TP, common terminal COM and communication terminal block H1.

[0028] When the local / remote control terminal L / F is disconnected, the controller is in local operation mode and only executes the commands issued by the panel buttons, and the remote commands are invalid; when the input is connected, the controller is in remote operation mode and only executes the remote commands, and the commands issued by the panel buttons are invalid.

[0029] When the controller is in the overload protection lock state, inputting the instantaneous remote reset terminal FRES high pulse signal will return the controller to the standby state

[0030] The circuit breaker interlock terminal LK1 is connected to the auxiliary contact of the circuit breaker. When the circuit breaker is in the open state, the auxiliary contact is closed and the trolley can be operated electrically.

[0031] The grounding switch interlock terminal LK2 is connected to the auxiliary contact of the grounding switch. When the grounding switch is in the open state, the auxiliary contact is closed and the trolley can be operated electrically.

[0032] The spare interlock terminal LK3 is used to meet other interlocking requirements of the switch cabinet, such as cabinet door interlocking, etc. When the spare interlock is not in use, it is short-circuited with the common terminal.

[0033] Remote rack-in terminal FFW: When all interlocking conditions are met and the remote operation mode is in place, after an instantaneous rack-in command signal is given:

[0034] 1. When the system is in standby mode, the motor will be started to run towards the working position;

[0035] 2. If the system is running to the working position, it will not respond to this command.

[0036] Remote swing-out terminal FBW: When all interlocking conditions are met and the remote operation mode is in place, after an instantaneous swing-out command signal is given:

[0037] 1. When the system is in standby mode, the motor will be started to run towards the test position;

[0038] 2. If the system is running towards the test position, it will not respond to this command.

[0039] The working position terminal WP is connected to the normally open contact of the trolley working position auxiliary switch.

[0040] The test position terminal TP is connected to the normally open contact of the trolley test position auxiliary switch.

[0041] The common terminal COM is the common negative pole of the command port and the signal port, which is isolated from the total power supply of the controller, allowing the use of another set of control power supply

[0042] The controller 2 is provided with a power conversion circuit, an MCU chip U10 and a communication chip U6. The communication chip U6 is communicatively connected to the MCU chip U10, the communication chip U6 is electrically connected to the communication terminal block H1, the indicator light group is electrically connected to the output end of the MCU chip U10, and the control button is electrically connected to the input end of the MCU chip U10.

[0043] The communication terminal block H1 includes P+, N-, GND, RS485 interface, and adopts MODBUS RTU protocol.

[0044] like Figure 4 and 5 As shown in the figure, the T / -R, TXD and RXD pins of the MCU chip U10 are connected to the communication chip U6, and the P+, ​​N- and GND terminals of the communication chip U6 are connected to the communication terminal block H1.

[0045] The above-mentioned motor terminals M+ and M- are connected to the trolley motor M, the motor terminals M+ and M- are electrically connected to the motor driver D1 in the controller 2, and the motor driver D1 is electrically connected to the output end of the MCU chip U10.

[0046] The above-mentioned fault output terminals A1 and A2 are electrically connected to the two ends of the normally open switch of the fault relay K1. One end of the relay coil of the fault relay K1 is connected to the output end of the MCU chip U10, and the other end is connected to the ground wire GND. The normally open switch of the fault relay K1 is also connected to the fault control circuit to control the fault indicator LED6.

[0047] like Figure 4 As shown in the figure, the P6.7A7 pin at the output end of the MCU chip U10 is electrically connected to the relay coil of the fault relay K1. When the MCU determines that the trolley has a fault, the P6.7A7 pin outputs a high-level signal to control the relay coil to be energized, and the normally open switch pins 4 and 5 are energized. The high-level VCC is sent to the fault indicator LED6 through D6 and R9 to light it up, and the energized state of pins 4 and 5 is sent to the fault output terminals A1 and A2.

[0048] like Figure 6 As shown in the figure, the above-mentioned power conversion circuit includes a rectifier bridge D1-D4 connected to the power terminals L and N, the output end of the rectifier bridge D1-D4 is connected to the power chip U2, the power chip U2 outputs a 24V power supply, the output end of the power chip U2 is connected to the power chip U7, and the power chip U7 outputs a 5V power supply.

[0049] It should be noted that the MCU control program for trolley control and status judgment in the utility model is a common means in this field. It cannot be considered that it does not belong to the protection object of the utility model just because there is a control chip in the utility model and there must be a program in the chip. The utility model is to protect its hardware connection structure and the technical effects of remote control and communication that it can bring.

Claims

1. An electric trolley control module for a smart substation, characterized in that: The electric trolley control module comprises a front panel (1), the front panel (1) being electrically connected to a controller (2) at a rear end, the controller (2) being provided with an external terminal block (3), the external terminal block (3) being used to connect to a trolley motor and to connect to a remote control signal and an interlocking signal, the external terminal block (3) being provided with a communication terminal block H1, the communication terminal block H1 being used to send a status signal of the electric trolley to a remote location.

2. The electric trolley control module for a smart substation according to claim 1, characterized in that: The front panel (1) is provided with an indicator light group and control buttons. The indicator light group includes a power indicator light LED1, a ready indicator light LED2, a remote indicator light LED3, a working position indicator light LED4, a test position indicator light LED5 and a fault indicator light LED6. The control buttons include a reset button S1, a rock-in button S2 and a rock-out button S3. The indicator light group is electrically connected to the output end of the controller (2), and the control buttons are electrically connected to the input end of the controller (2).

3. The electric trolley control module for a smart substation according to claim 2, characterized in that: The external terminal block (3) includes power terminals L and N, motor terminals M+ and M-, fault output terminals A1 and A2, local / remote control terminals L / F, remote reset terminal FRES, circuit breaker interlock terminal LK1, ground switch interlock terminal LK2, spare interlock terminal LK3, remote swing-in terminal FFW, remote swing-out terminal FBW, working position terminal WP, test position terminal TP, common terminal COM and communication terminal block H1.

4. The electric trolley control module for a smart substation according to claim 3, characterized in that: The controller (2) is provided with a power conversion circuit, an MCU chip U10 and a communication chip U6. The communication chip U6 is communicatively connected to the MCU chip U10, the communication chip U6 is electrically connected to the communication terminal block H1, the indicator light group is electrically connected to the output end of the MCU chip U10, and the control button is electrically connected to the input end of the MCU chip U10.

5. The electric trolley control module for a smart substation according to claim 4, characterized in that: The motor connection terminals M+ and M- are connected to the trolley motor M, the motor connection terminals M+ and M- are electrically connected to the motor driver D1 in the controller (2), and the motor driver D1 is electrically connected to the output end of the MCU chip U10.

6. The electric trolley control module for a smart substation according to claim 5, characterized in that: The fault output terminals A1 and A2 are electrically connected to both ends of the normally open switch of the fault relay K1. One end of the relay coil of the fault relay K1 is connected to the output end of the MCU chip U10, and the other end is connected to the ground wire GND. The normally open switch of the fault relay K1 is also connected to the fault control circuit to control the fault indicator LED6.

7. The electric trolley control module for a smart substation according to claim 6, characterized in that: The power conversion circuit includes a rectifier bridge D1-D4 connected to power terminals L and N, the output end of the rectifier bridge D1-D4 is connected to the power chip U2, the power chip U2 outputs 24V power, the output end of the power chip U2 is connected to the power chip U7, and the power chip U7 outputs 5V power.

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