A remote power management system for a 10kV feeder terminal

Abstract

The utility model discloses a power management technical field's a kind of 10kV feeder terminal's remote power management system, including operation and maintenance main station, and the feeder terminal connected with operation and maintenance main station, the feeder terminal includes main control module, further include integrated in the power module of the feeder terminal inside, the power module includes management circuit, and the I / O drive circuit of main control module is electrically connected with management circuit;By integrating the pulse activation circuit of power module and battery management function, battery investment and retirement relay, voltage sensor, current sensor and temperature sensor etc. Module to the inside of feeder terminal, become an organic component of feeder terminal, without external communication bus, significantly reduce external connector and cable, improve the reliability of system under the power distribution network field of complex electromagnetic environment, and the degree of integration is high, and wiring is simple.

Description

Technical Field

[0001] This utility model relates to the technical field of power management, and in particular to a remote power management system for a 10kV feeder terminal. Background Technology

[0002] Power supply reliability is the most important indicator of power grid operation. The stability of the distribution automation system is related to important power supply reliability indices such as planned power outage duration and fault recovery time. The online status of the distribution automation terminal is the foundation and top priority of the entire distribution automation system. When a power outage fault occurs on a line, the remote control, telemetry, remote signaling, and fault detection functions of the FTU (Feeder Terminal Unit) can accurately locate and isolate the fault point in the first instance, and remotely export the non-faulty power supply area. The entire process takes only 3-5 minutes.

[0003] Existing remote power management systems for 10kV feeder terminals employ multiple modules. For example, patent publication number CN109921109A discloses an intelligent online maintenance system for power batteries, which includes a remote monitoring terminal, a data center server, a local monitoring device, a battery balancing and desulfurization module, a battery temperature detection module, a battery intelligent discharge load, and a feeder switch module. The battery balancing and desulfurization module, battery temperature detection module, battery intelligent discharge load, and feeder switch module are all communicatively connected to the local monitoring device. The local monitoring device is externally connected to a charger communication unit, thereby connecting to the charger. The charger is connected to the battery pack via a power cable. The remote monitoring terminal is connected to the local monitoring device through the data center server.

[0004] The shortcomings of existing patented technology solutions: The distributed system architecture, which uses external multi-modules connected via RS485 bus, is bulky, has complex wiring, and is costly, and cannot be integrated into the space-constrained feeder terminal unit (FTU) that requires high reliability. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide a remote power management system for a 10kV feeder terminal. By integrating power modules and battery management functions such as pulse activation circuits, battery activation / deactivation relays, voltage sensors, current sensors, and temperature sensors into the feeder terminal, it becomes an organic component of the feeder terminal. It eliminates the need for an external communication bus, significantly reduces external connectors and cables, improves the reliability of the system in complex electromagnetic environments of power distribution networks, and features high integration and simple wiring.

[0007] To solve the above-mentioned technical problems, this utility model provides a mica paper gluing device, which adopts the following technical solution: it includes an operation and maintenance master station and a feeder terminal connected to the operation and maintenance master station. The feeder terminal includes a main control module and a power module integrated inside the feeder terminal. The power module includes a management circuit. The I / O drive circuit of the main control module is electrically connected to the management circuit.

[0008] Optionally, the management circuit includes a pulse activation circuit and a battery activation / deactivation relay.

[0009] Optionally, the power module may further include a voltage sensor, a current sensor, and a temperature sensor for detecting battery voltage, internal resistance, and temperature.

[0010] Optionally, a PCB board is also included, in which the voltage sensor, current sensor, temperature sensor, pulse activation circuit, and battery activation / deactivation relay are all integrated and directly connected to the I / O drive circuit of the main control module through internal traces of the PCB board.

[0011] Optionally, the main control module further includes an MCU control module and a DC / DC module, and the power supply module further includes an AC / DC module and a backup battery. The management circuit is electrically connected to the AC / DC module, the backup battery, and the DC / DC module, respectively.

[0012] Optionally, the pulse activation circuit includes a relay K1, the battery activation / deactivation relay is a relay K2, the relay K1 and the relay K2 are electrically connected, and the backup battery is connected to the DC / DC module of the main control module through the relay K2.

[0013] Optionally, the pulse activation circuit further includes a local manual activation start button K3 and a local manual activation exit button K4 connected to the relay K1.

[0014] Optionally, the feeder terminal further includes a 4G module, the main control module includes an Ethernet parsing module, the MCU control module is connected to the Ethernet parsing module via a serial port, the Ethernet parsing module is connected to the 4G module via Ethernet, the maintenance master station includes a 4G communication terminal and a computer, the 4G module is connected to the 4G communication terminal via an operator base station, and the 4G communication terminal is connected to the computer via Ethernet.

[0015] In summary, this utility model has at least one of the following beneficial effects: 1. This utility model integrates power supply module and battery management function pulse activation circuit, battery on / off relay, voltage sensor, current sensor and temperature sensor and other modules into the inside of the feeder terminal, making it an organic part of the feeder terminal. It does not require an external communication bus, significantly reduces external connectors and cables, improves the reliability of the system in the complex electromagnetic environment of the power distribution network, has high integration and simple wiring. 2. This utility model collects battery data through voltage, current and temperature sensors, which serves as a prerequisite for performing activation, addition and removal operations, thereby realizing intelligent decision-making and ensuring the effective desulfation of the pulse activation circuit; 3. This utility model is based on 4G wireless communication technology, which enables the feeder terminal to respond to the remote instructions issued by the operation and maintenance master station in a timely manner; it can also be used to manually control the activation start button K3 and the activation exit button K4 to directly pull the HG and HK signals low locally, thereby realizing local activation start and exit. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the system principle of this utility model; Figure 2 This is a circuit diagram showing the connection between the main control module and the management circuit of this utility model; Figure 3 This is a flowchart of the activation and startup control process for the operation and maintenance master station of this utility model.

[0018] Explanation of reference numerals in the attached diagram: 1. Maintenance master station; 2. Feeder terminal; 3. Main control module; 4. Power supply module; 5. Management circuit; 6. I / O drive circuit; 7. Voltage sensor; 8. Current sensor; 9. Temperature sensor; 10. PCB board; 11. MCU control module; 12. DC / DC module; 13. AC / DC module; 14. Backup battery; 15. 4G module; 16. Ethernet parsing module; 17. 4G communication terminal; 18. Computer; 19. Carrier base station. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1

[0023] Reference Figures 1-3 This utility model discloses a remote power management system for a 10kV feeder terminal, including an operation and maintenance master station 1 and a feeder terminal 2 connected to the operation and maintenance master station 1. The feeder terminal 2 includes a main control module 3 and a power module 4 integrated inside the feeder terminal 2. The power module 4 includes a management circuit 5. The I / O drive circuit 6 of the main control module 3 is electrically connected to the management circuit 5.

[0024] By adopting the above structure, the power module 4 and the management circuit 5 for battery management function are innovatively integrated from the "external independent system" into the inside of the feeder terminal (FTU) 2, becoming an organic component of the feeder terminal, thus solving the pain point of unmanned management of the feeder terminal's own backup power.

[0025] In detail, in this embodiment, the management circuit 5 includes a pulse activation circuit and a battery activation / deactivation relay. The power module 4 also includes a voltage sensor 7, a current sensor 8, and a temperature sensor 9 for detecting battery voltage, internal resistance, and temperature. It also includes a PCB board 10, on which the voltage sensor 7, current sensor 8, temperature sensor 9, pulse activation circuit, and battery activation / deactivation relay are all integrated and directly connected to the I / O drive circuit 6 of the main control module 3 via internal traces.

[0026] The integrated voltage sensor 7, current sensor 8, and temperature sensor 9 can collect data such as battery voltage, internal resistance, and temperature in real time. The pulse activation circuit can break down sulfation through intermittent charging and discharging at a 0.2C current. By integrating the pulse activation circuit and the battery activation / deactivation relay into the same power module 4, and directly driving them through the I / O drive circuit 6 of the main control module 3, hardware-level coordinated control is achieved. No external communication bus (such as RS485) is required, significantly reducing external connectors and cables and improving the system's reliability in complex electromagnetic environments such as power distribution networks.

[0027] This invention not only collects other data, but more importantly, it introduces a triple judgment logic based on voltage, temperature, and internal resistance. Data from the battery is collected through voltage sensor 7, current sensor 8, and temperature sensor 9, serving as a prerequisite for operations such as activation and deactivation. This achieves intelligent decision-making, rather than simply forwarding remote commands. The maintenance master station 1 issues commands, and the feeder terminal 2 must verify whether the battery voltage, temperature, and internal resistance all meet preset conditions before execution; otherwise, it refuses to execute and reports the specific abnormal parameters.

[0028] In detail, in this embodiment, the main control module 3 further includes an MCU control module 11 and a DC / DC module 12, and the power supply module 4 further includes an AC / DC module 13 and a backup battery 14. The management circuit 5 is electrically connected to the AC / DC module 13, the backup battery 14, and the DC / DC module 12, respectively. Dual power supply is provided through the AC / DC module 13 and the backup battery 14, and switching is achieved through a battery activation / deactivation relay.

[0029] The connection circuit diagram of the management circuit 5 between the main control module 3 and the power supply module 4 is as follows: Figure 2As shown, the pulse activation circuit includes a relay K1, which controls the pulse activation circuit to intermittently charge and discharge at a current of 0.2C to break the sulfation. The battery activation / deactivation relay is relay K2. The DC 24V power supply is connected to relay K2 through relay K1. The backup battery 14 is connected to the DC / DC module 12 of the main control module 3 through relay K2. Figure 2 In the main control module 3, U3 is the DC / DC module 12, U4 is the MCU control module 11, U1 / U2 are the activation / exit / start control terminals of the MCU control module 11, resistors R1 and R2 are used for optocoupler drive current limiting, and capacitors C1 and C2 are used for digital signal filtering and anti-jitter. U1, U2, U3, U4, resistors R1 and R2, and capacitors C1 and C2 together form the MCU control module 11, which controls the activation / start and exit circuits of the power supply module 4 through the I / O drive circuit 6.

[0030] Activation Exit: MCU control module 11 sets IO (MCU_HG), pulls external signal HG low via optocoupler → relay K1 resets → AC / DC module 13 inside power module 4 directly sends DC24 V to V_OUT of DC / DC module 12, activating and exiting.

[0031] Activation and startup: MCU control module 11 sets IO (MCU_HK), pulls the external signal HK low through optocoupler → relay K1 is energized → DC24V is applied to the coil of relay K2 → relay K2 is energized → battery BAT is connected to V_OUT of DC / DC module 12, activating and starting.

[0032] Figure 2 In power module 4, DD1, DD2, and DD3 are protection diodes, and DD4 is a battery unidirectional charging diode; U5 is AC / DC module 13 that converts external power into internal DC 24V power; U6 is backup battery 14, which is a lead-acid battery consisting of two DC 12V batteries connected in series.

[0033] The pulse activation circuit also includes a local manual activation start button K3 and a local manual activation exit button K4 connected to the relay K1. The HG and HK signals can be directly pulled low locally using the local manual activation start button K3 and the local manual activation exit button K4, thus achieving local activation start and exit.

[0034] Example 2

[0035] Reference Figures 1-3Based on the same concept as in Embodiment 1 above, this remote power management system for a 10kV feeder terminal also includes a feeder terminal 2 and a 4G module 15. The main control module 3 includes an Ethernet parsing module 16. The MCU control module 11 is connected to the Ethernet parsing module 16 via a serial port. The Ethernet parsing module 16 is connected to the 4G module 15 via Ethernet. The maintenance master station 1 includes a 4G communication terminal 17 and a computer 18. The 4G module 15 is connected to the 4G communication terminal 17 via an operator base station 19. The 4G communication terminal 17 and the computer 18 are connected via Ethernet.

[0036] Remote control logic based on 4G wireless communication: In view of the characteristics of the distributed and unattended deployment of feeder terminal (FTU) 2, a low-latency and high-reliability control process (such as 0.5ms emergency switching) based on the wireless public network was designed, and a closed-loop management was formed with the operation and maintenance master station 1.

[0037] After being transmitted, the commands from the main maintenance station 1 are parsed by the Ethernet parsing module 16 of the main control module 3, driving the following operations: remotely controlling battery activation / deactivation via battery activation / deactivation relays; controlling the on / off state of the pulse activation circuit relays; triggering the pulse activation circuit relays to start the pulse circuit for activation start / stop; battery status (charge, health) and power failure events can also be collected and fed back via remote signaling through the MCU control module 11. This achieves fully automatic, highly integrated, and early warning-enabled power management for feeder terminal 2, showing a significant improvement in response speed and reliability compared to existing technologies.

[0038] It should be noted that the voltage sensor 7, current sensor 8, temperature sensor 9, DC / DC module 12 mentioned in Embodiment 1 and Embodiment 2, and the power supply module 4 also include AC / DC module 13, backup battery 14, 4G module 15, Ethernet parsing module 16, MCU control module 11, 4G communication terminal 17, computer 18, operator base station 19, etc. are all commonly used modules in the field. Their working principles, dimensions and models are not related to the functions of this application, so they will not be described in detail.

[0039] Working principle: The maintenance master station 1 issues commands such as "battery activation" or "battery deactivation" through the management platform; the commands are sent from computer 18 to 4G communication terminal 17 via Ethernet; 4G communication terminal 17 sends the commands to operator base station 19 via wireless link, and then operator base station 19 forwards them to 4G module 15 inside feeder terminal (FTU) 2; 4G module 15 transmits the commands to Ethernet parsing module 16 via Ethernet, and MCU control module 11 parses the commands according to Ethernet parsing module 16; using I / O drive circuit 6 to drive the pulse activation circuit and battery activation / deactivation relay in power module 4, the battery activation or deactivation operation is completed.

[0040] As shown in the following specific embodiments, Remote battery activation / deactivation: The maintenance master station 1 sends a "battery deactivation" command → MCU control module 11 sets the IO (MCU_HG), and pulls the external signal HG low via the optocoupler → K1 relay resets, disconnecting the battery circuit → the internal AC / DC module 13 of power module 4 directly sends DC24 V to V_OUT of DC / DC module 12 to power feeder terminal (FTU) 2, activating and deactivating the battery.

[0041] Automatic activation control: The maintenance master station 1 sends activation commands periodically → the MCU control module 11 receives battery voltage, temperature, and internal resistance data detected by voltage sensor 7, current sensor 8, and temperature sensor 9 → the pulse activation circuit is activated for 2 hours → the activation results are uploaded; Before activation starts, the MCU control module 11 synchronously detects the three parameters of battery voltage, temperature, and internal resistance. Activation is only performed when all parameters meet the preset conditions, and a "activation started" message is sent back to the maintenance master station 1; if any indicator is non-compliant, the MCU control module 11 refuses to drive, activation is terminated, and a "activation start failed" message is sent back, reporting the cause of the fault.

[0042] Emergency troubleshooting: When AC / DC module 13 loses power, it can switch to backup battery 14 for power supply and simultaneously upload "AC power failure" remote signal.

[0043] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A remote power management system for a 10kV feeder terminal, comprising an operation and maintenance master station (1) and a feeder terminal (2) connected to the operation and maintenance master station (1), wherein the feeder terminal (2) includes a main control module (3), characterized in that: It also includes a power module (4) integrated inside the feeder terminal (2), the power module (4) including a management circuit (5), and the I / O drive circuit (6) of the main control module (3) is electrically connected to the management circuit (5).

2. The remote power management system for a 10kV feeder terminal according to claim 1, characterized in that: The management circuit (5) includes a pulse activation circuit and a battery activation / deactivation relay.

3. The remote power management system for a 10kV feeder terminal according to claim 2, characterized in that: The power module (4) also includes a voltage sensor (7), a current sensor (8), and a temperature sensor (9) for detecting battery voltage, internal resistance, and temperature.

4. The remote power management system for a 10kV feeder terminal according to claim 3, characterized in that: It also includes a PCB board (10), on which the voltage sensor (7), current sensor (8), temperature sensor (9), pulse activation circuit and battery activation / deactivation relay are all integrated and directly connected to the I / O drive circuit (6) of the main control module (3) through the internal wiring of the PCB board (10).

5. A remote power management system for a 10kV feeder terminal according to any one of claims 2-4, characterized in that: The main control module (3) also includes an MCU control module (11) and a DC / DC module (12), and the power supply module (4) also includes an AC / DC module (13) and a backup battery (14). The management circuit (5) is electrically connected to the AC / DC module (13), the backup battery (14) and the DC / DC module (12) respectively.

6. The remote power management system for a 10kV feeder terminal according to claim 5, characterized in that: The pulse activation circuit includes a relay K1, the battery activation / deactivation relay is a relay K2, the relay K1 and the relay K2 are electrically connected, and the backup battery (14) is connected to the DC / DC module (12) of the main control module (3) through the relay K2.

7. A remote power management system for a 10kV feeder terminal according to claim 6, characterized in that: The pulse activation circuit also includes a local manual activation start button K3 and a local manual activation exit button K4 connected to the relay K1.

8. A remote power management system for a 10kV feeder terminal according to claim 5, characterized in that: The feeder terminal (2) also includes a 4G module (15), the main control module (3) includes an Ethernet parsing module (16), the MCU control module (11) is connected to the Ethernet parsing module (16) via a serial port, the Ethernet parsing module (16) is connected to the 4G module (15) via Ethernet, the maintenance master station (1) includes a 4G communication terminal (17) and a computer (18), the 4G module (15) is connected to the 4G communication terminal (17) via an operator base station (19), and the 4G communication terminal (17) and the computer (18) are connected via Ethernet.

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