3va ultra-low power primary and secondary deeply fused device

Abstract

The utility model provides a kind of 3VA ultra-low power consumption's primary and secondary depth fusion device, including primary switch and FTU controller, primary switch is built-in for the pole of capacitor power taking, and its power side and load side are connected with the output end of a pole respectively;Capacitor power taking module is arranged in pole, and capacitor power taking module includes capacitor voltage divider and electromagnetic unit, one end of the high voltage capacitor of capacitor voltage divider is connected with the high voltage terminal of primary switch, and the other end is connected with the low voltage terminal of primary switch by low voltage capacitor, and the medium voltage capacitor tap of high voltage capacitor and low voltage capacitor is connected with the input end of electromagnetic unit, and electromagnetic unit provides matching inductive compensation output standard 24V low-voltage alternating current.The utility model reaches the effect of easy installation and maintenance, efficient electric energy conversion, low-power operation and self-adapting power management by setting the pole of built-in capacitor power taking in primary side and the power management module of FTU controller.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage power transmission and distribution technology, specifically to a 3VA ultra-low power consumption primary and secondary deep fusion device. Background Technology

[0002] As the power grid evolves towards digitalization and intelligence, the demand for feeder terminal units (FTUs), as core monitoring units in distribution networks, is increasing year by year, and their technology is also being upgraded. With the application of primary and secondary integration technology becoming increasingly stable and reliable, power consumption control has become a key technological challenge. Traditional FTU power supply architectures primarily rely on external voltage transformers (PTs) for energy conversion. Specifically, the PT converts the primary high voltage to 220V AC, which is then output as 24V DC via an AC / DC module, and finally stepped down to 5VDC by a DC / DC module to power the controller core unit. However, this solution has the following drawbacks: 1. Traditional PT power supply requires the use of large horn-shaped PTs on the line, which is not conducive to the on-site installation of primary and secondary sets and is difficult to maintain; 2. Severe energy loss: The electrical energy undergoes multiple conversion stages, resulting in low overall efficiency and a large amount of energy being lost as heat. Furthermore, the large power consumption exceeds the maximum output capacity of the new capacitor's electrode post, limiting its application in scenarios without a power supply (PT). 3. Insufficient power supply stability: The output power of the PT fluctuates when the power grid is lightly loaded or in the event of a fault, forcing the system to frequently activate the backup power supply, which increases the maintenance burden. 4. Lack of power management and real-time monitoring: Traditional power management units and controller functional modules lack a coordination mechanism and cannot dynamically adjust parameters such as sampling frequency and communication rate according to the power grid status, resulting in redundant power consumption accumulation under static operating conditions.

[0003] Therefore, there is an urgent need for a 3VA ultra-low power deep integration device for primary and secondary applications to achieve efficient power conversion, low power operation of equipment, and adaptive power management, so as to improve product competitiveness. Utility Model Content

[0004] This utility model provides a 3VA ultra-low power primary and secondary deep fusion device, which is mainly used to solve the problems of high installation and maintenance costs, high energy loss, insufficient power supply stability and lack of power management of existing PT power supplies, thereby achieving the effects of easy installation and maintenance, high-efficiency power conversion, low power consumption operation and adaptive power management.

[0005] This utility model achieves the above objectives through the following technical solutions: A 3VA ultra-low power primary and secondary deep fusion device includes a primary switch and an FTU controller. The primary switch provides input power to the FTU controller on the secondary side. The primary switch has a built-in terminal for capacitor power extraction, with its power supply side and load side respectively connected to the output terminal of one of the terminals to obtain 24V low-voltage AC power. A capacitor power extraction module is installed in the terminal, which includes a capacitor voltage divider and an electromagnetic unit. The capacitor voltage divider includes a high-voltage capacitor and a low-voltage capacitor. One end of the high-voltage capacitor is connected to the high-voltage terminal of the primary switch, and the other end is connected to the low-voltage terminal of the primary switch through the low-voltage capacitor. The intermediate-voltage capacitor taps of the high-voltage and low-voltage capacitors are connected to the input terminal of the electromagnetic unit. The electromagnetic unit forms a series resonance with the capacitive reactance of the capacitor voltage divider by providing matched inductive compensation to output standard 24V low-voltage AC power.

[0006] A further embodiment includes an insulating shell, which is a hollow shell structure with an open bottom. An epoxy resin shell is fitted onto the inner surface of the insulating shell, and the capacitor voltage divider is sealed inside the epoxy resin shell.

[0007] A further embodiment is that the FTU controller also includes a power management module, a main control module, and a dual backup power module. The power management module is used to convert, distribute, and adaptively manage the 24V low-voltage AC power output from the power supply side and / or load side of the primary switch, and output the main power and operating power to the main control module, and output the first backup power and the second backup power to the dual backup power module.

[0008] A further embodiment includes a power management module comprising a voltage conversion and power control module, a charge / discharge management module, and a signal control module. The voltage conversion and power control module is connected to the 24V low-voltage AC power supply and converts it to 5V DC power. Its first output terminal is connected to the power input terminal of the main control module, and its second output terminal is connected to the power input terminal of the charge / discharge management module. The dual output terminals of the charge / discharge management module are respectively connected to the dual charging terminals of the dual backup power modules. By monitoring the load status of the FTU controller in real time, the module adjusts the charge / discharge current of the backup power modules accordingly. The signal control module is connected to the backup power modules via multiple control signal lines to monitor the status parameters of the backup power modules in real time and control their output start / stop.

[0009] A further embodiment is that the backup power module includes a supercapacitor, a lithium battery, an activation circuit, and a power relay. The supercapacitor and the lithium battery are charged through the first backup power supply and the second backup power supply, respectively. The activation circuit is connected to the lithium battery, and the switching contacts of the power relay are connected to the power input terminal of the lithium battery.

[0010] A further embodiment is that the voltage conversion and power control module includes a power distribution unit, a voltage conversion circuit, and a voltage regulator circuit. The power distribution unit is used to adaptively adjust the power supply of the main control module and the charging supply of the dual backup power modules. The voltage conversion circuit is used to convert the input 24V low-voltage AC power into 5V DC power output. The voltage regulator circuit is used to maintain the output accuracy of the 5V DC power at ±2%.

[0011] A further embodiment is that the charge / discharge management module includes a sampling circuit and a charge / discharge management IC. The sampling circuit is used to sample the charge / discharge current of the backup power module and output the sampled current signal to the charge / discharge management IC. The charge / discharge management IC is a dual-channel independent charging IC.

[0012] A further embodiment is that the signal control module includes a multi-channel signal control terminal, a power switching terminal, and a status feedback monitoring terminal. The activation control terminal is connected to the drive terminal of the activation circuit to trigger or terminate the activation discharge of the lithium battery; the power switching terminal is connected to the control terminal of the power relay to realize the switching control of the backup power supply; and the status feedback monitoring terminal feeds back the activation status signal to the charge and discharge management module.

[0013] A further embodiment is that the main control module includes a data sampling module, a CPU module, a driver module, and several functional modules. The data sampling module is used to collect voltage signals, current signals, and remote signaling signals from the feeder terminal equipment, and outputs the sampled signals to the CPU module after data processing. The CPU module and several functional modules are powered by the main power supply. The driver module is powered by the operating power supply and is used to drive the circuit breaker to operate.

[0014] A further embodiment includes, but is not limited to, a communication module, a GPS module, and an LCD display. The CPU module is connected to the communication module, the GPS module, and the LCD display via a data bus, respectively, for transmitting waveform recording data and remote control commands, clock calibration, and line data display.

[0015] Therefore, this utility model has the following beneficial effects: 1. This utility model replaces the traditional PT power supply by setting a terminal with a built-in capacitor for power extraction on the primary side. Compared with the traditional PT power supply, it can save the large horn PT on the line and replace it with a smaller terminal, making the on-site installation of the primary and secondary sets more flexible and the maintenance more convenient.

[0016] 2. This utility model adopts a built-in capacitor electrode post, which can directly obtain energy from the power supply side and load side of the primary switch and output two sets of 24V low-voltage AC power; and the secondary side FTU controller replaces the multi-stage conversion link with a highly integrated power management module to achieve direct and efficient conversion from 24VAC to 5VDC.

[0017] 3. The FTU controller of this utility model monitors the power grid status data in real time through a highly integrated power management module and can dynamically adjust the operating mode of each functional module, so that the system can maintain ultra-low power consumption while ensuring core functions. Thus, under the premise of meeting functional requirements, the device can achieve low power consumption operation, which greatly improves the product's competitiveness in the industry.

[0018] 4. The FTU controller of this utility model adopts a common dual backup power supply scheme, which greatly improves the reliability of the controller in dealing with sudden line situations and indirectly improves the service quality of the power grid.

[0019] 5. The FTU controller of this utility model integrates multiple functional units, such as communication, GPS, and display, which improves the integration level of the FTU controller and realizes the miniaturized design of the primary and secondary deep fusion device.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the primary and secondary deep fusion device provided in an embodiment of the present invention.

[0022] Figure 2 This is a circuit diagram of the capacitive power extraction module provided in this embodiment of the utility model.

[0023] Figure 3 This is a diagram of the pole structure provided in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the main control module provided in an embodiment of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] An embodiment of a 3VA ultra-low power primary and secondary deep fusion device See Figure 1-2 This utility model relates to a 3VA ultra-low power primary and secondary deep fusion device, including a primary switch 10 and an FTU controller 20. The primary switch 10 provides input power to the secondary FTU controller 20. The primary switch 10 has a built-in terminal for capacitor power extraction, and its power supply side and load side are respectively connected to the output terminal of the terminal to obtain 24V low-voltage AC power. The terminal is equipped with a capacitor power extraction module 11, which includes a capacitor voltage divider 12 and an electromagnetic unit 13. The capacitor voltage divider 12 includes a high-voltage capacitor C1 and a low-voltage capacitor C2. One end of the high-voltage capacitor C1 is connected to the high-voltage terminal of the primary switch 10, and the other end is connected to the low-voltage terminal of the primary switch 10 through the low-voltage capacitor C2. The medium-voltage capacitor taps of the high-voltage capacitor C1 and the low-voltage capacitor C2 are connected to the input terminal of the electromagnetic unit 13. The electromagnetic unit 13 forms a series resonance with the capacitive reactance of the capacitor voltage divider 12 by providing matched inductive compensation to output the standard 24V low-voltage AC power.

[0027] Specifically, in this embodiment, the electromagnetic unit 13 uses a damping reactor L. The damping reactor L provides a matching inductive reactance to form a pair with the capacitive reactance of the capacitor voltage divider 12. It is used to suppress the inrush current generated when the capacitor voltage divider 12 is closed, and to cancel the capacitive reactance of the capacitor voltage divider 12 at resonance. This makes the output voltage unaffected by load changes and system frequency fluctuations, and keeps it stable and proportional to the input high voltage.

[0028] Specifically, in this embodiment, the power supply side and load side of the primary switch 10 are each connected to a terminal. Each terminal outputs a 24V low-voltage AC power to the FTU controller 20. The FTU controller then performs power conversion through the internal power management module 30, and the output voltage is 5VDC, which can directly supply power to the main control module 40. This eliminates the need for a 24VDC to 5VDC power conversion process, thus greatly improving the power efficiency of the FTU controller 20.

[0029] See Figure 3In this embodiment, the electrode post further includes an insulating shell 14, which is a hollow shell structure with an open bottom. An epoxy resin shell is fitted on the inner surface of the insulating shell 14, and the capacitor voltage divider 12 is sealed inside the epoxy resin shell.

[0030] Specifically, in this embodiment, the outer surface of the insulating shell 14 is uniformly provided with umbrella skirts, the upper umbrella skirts are of different sizes, and the topmost one is a large umbrella to increase the climbing distance and for waterproofing.

[0031] See Figure 1 In this embodiment, the FTU controller 20 further includes a power management module 30, a main control module 40, and a dual backup power module 50. The power management module 30 is used to convert, distribute, and adaptively manage the 24V low-voltage AC power output from the power supply side and / or load side of the primary switch 10, and output the main power and operating power to the main control module 40, and output the first backup power and the second backup power to the dual backup power module 50.

[0032] In this embodiment, the power management module 30 includes a voltage conversion and power control module 31, a charge / discharge management module 32, and a signal control module 33. The voltage conversion and power control module 31 is connected to the 24V low-voltage AC power and is used to convert the 24V low-voltage AC power to 5V DC power. It is connected to the power input terminal of the main control module 40 through a first output terminal, and its second output terminal is connected to the power input terminal of the charge / discharge management module 32. The dual output terminals of the charge / discharge management module 32 are respectively connected to the dual charging terminals of the dual backup power modules 50. It monitors the load status of the FTU controller 20 in real time and adjusts the charging and discharging current of the backup power modules accordingly. The signal control module 33 is connected to the backup power modules through multiple control signal lines and is used to monitor the status parameters of the backup power modules in real time and control their output start / stop.

[0033] In this embodiment, the backup power module includes a supercapacitor, a lithium battery, an activation circuit, and a power relay. The supercapacitor and the lithium battery are charged through the first backup power supply and the second backup power supply, respectively. The activation circuit is connected to the lithium battery and is used to restore or increase the capacity of the lithium battery through periodic deep discharge. The switching contacts of the power relay are connected to the power input terminal of the lithium battery.

[0034] In this embodiment, the voltage conversion and power control module 31 includes a power distribution unit, a voltage conversion circuit, and a voltage regulation circuit. The power distribution unit is used to automatically track the maximum power point of the input of different poles and adaptively adjust the power supply of the main control module 40 and the charging supply of the dual backup power module 50. The voltage conversion circuit is used to convert the input 24V low-voltage AC power into 5V DC power output.

[0035] Specifically, the voltage regulator circuit described in this embodiment is used to maintain an output accuracy of 5V±2% when the input 24V low-voltage AC power drops to the lowest threshold.

[0036] Specifically, in this embodiment, the power distribution unit adopts the maximum power point tracking (MPPT) technology to track the maximum power point of input for different terminals and dynamically match the input characteristics of different terminals to prioritize the power supply requirements of the main control module 40 of the controller. Furthermore, by combining MPPT with adaptive control, the power supply priority of the main control module 40 is maintained when the input of the power supply terminal fluctuates.

[0037] In this embodiment, the charge / discharge management module 32 includes a sampling circuit and a charge / discharge management IC. The sampling circuit is used to sample the charge / discharge current of the backup power module and output the sampled current signal to the charge / discharge management IC. The charge / discharge management IC is a dual-channel independent charging IC.

[0038] Specifically, in this embodiment, the charging and discharging management module 32 analyzes the data based on the real-time collected input capacitor voltage and FTU controller 20 operating status data to ensure that the system is in normal operating condition, thereby shutting down the power supply of unnecessary functional modules to reduce power consumption; when abnormal fluctuations in the line are detected, the backup power supply module is activated and the charging and discharging strategy of the backup power supply is adjusted.

[0039] The charge / discharge management IC dynamically adjusts the switching frequency of the power devices to match the load demand, specifically by dynamically adjusting the charging duty cycle of the backup power module based on the sampled current signal.

[0040] Specifically, the charge / discharge management IC in this embodiment supports fast charging protocols and can accurately manage charging current / voltage to prevent overcharging or deep discharging and extend lithium battery life.

[0041] In this embodiment, the signal control module 33 includes a multi-channel signal control terminal, a power switching terminal, and a status feedback monitoring terminal, which realizes millisecond-level response control of the backup power supply charging and discharging rate through a multi-channel feedback network.

[0042] Specifically, in this embodiment, the activation control terminal is connected to the drive terminal of the activation circuit via the activation start control signal line HK or the activation stop control signal line HG, used to trigger or terminate the deep discharge of the lithium battery. The power switching terminal is connected to the control terminal of the power relay via the battery input control signal line BK or the battery output control signal line BG, used to realize the switching control of the backup power supply. The status feedback monitoring terminal feeds back the activation status signal to the charge / discharge management module 32 via the activation status signal line HOK. The status feedback monitoring terminal also samples the output voltage of the charge / discharge management module 32 in real time via the battery undervoltage signal line VL for real-time monitoring.

[0043] See Figure 4 In this embodiment, the main control module 40 includes a data sampling module 41, a CPU module 42, a drive module 43, and several functional modules. The data sampling module 41 is used to collect voltage signals, current signals, and remote signaling signals of the feeder terminal equipment, and outputs the sampled signals to the CPU module 42 after data processing. The CPU module 42 and several functional modules are powered by the main power supply. The drive module 43 is powered by the operating power supply and is used to drive the circuit breaker to operate.

[0044] In this embodiment, the functional modules include, but are not limited to, a communication module, a GPS module, and a liquid crystal display. The CPU module 42 is connected to the communication module 44, the GPS module 45, and the liquid crystal display 46 via a data bus, respectively, and is used to transmit waveform recording data and remote control commands, perform clock calibration, and display line data.

[0045] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A 3VA ultra-low power primary and secondary deep fusion device, comprising a primary switch and an FTU controller, wherein the primary switch is used to provide input power to the secondary-side FTU controller, characterized in that: The primary switch has a built-in terminal for capacitor power extraction. Its power supply side and load side are respectively connected to the output terminal of one of the terminals to obtain 24V low-voltage AC power. A capacitor power extraction module is installed within the terminal. This module includes a capacitor voltage divider and an electromagnetic unit. The capacitor voltage divider includes a high-voltage capacitor and a low-voltage capacitor. One end of the high-voltage capacitor is connected to the high-voltage terminal of the primary switch, and the other end is connected to the low-voltage terminal of the primary switch through the low-voltage capacitor. The intermediate-voltage capacitor taps of the high-voltage and low-voltage capacitors are connected to the input terminal of the electromagnetic unit. The electromagnetic unit provides matched inductive compensation and forms a series resonance with the capacitive reactance of the capacitor voltage divider to output standard 24V low-voltage AC power.

2. The 3VA ultra-low power primary and secondary deep fusion device according to claim 1, characterized in that: The electrode also includes an insulating shell, which is a hollow shell structure with an open bottom. An epoxy resin shell is fitted on the inner surface of the insulating shell, and the capacitor voltage divider is sealed inside the epoxy resin shell.

3. The 3VA ultra-low power primary and secondary deep fusion device according to claim 1, characterized in that: The FTU controller also includes a power management module, a main control module, and a dual backup power module. The power management module is used to convert, distribute, and adaptively manage the 24V low-voltage AC power output from the power supply side and / or load side of the primary switch, and output the main power and operating power to the main control module, and output the first backup power and the second backup power to the dual backup power module.

4. The 3VA ultra-low power primary and secondary deep fusion device according to claim 3, characterized in that: The power management module includes a voltage conversion and power control module, a charge / discharge management module, and a signal control module. The voltage conversion and power control module is connected to the 24V low-voltage AC power and is used to convert the 24V low-voltage AC power to 5V DC power. It is connected to the power input terminal of the main control module through a first output terminal and the power input terminal of the charge / discharge management module through a second output terminal. The dual output terminals of the charge / discharge management module are respectively connected to the dual charging terminals of the dual backup power modules. It monitors the load status of the FTU controller in real time and adjusts the charging and discharging current of the backup power modules accordingly. The signal control module is connected to the backup power modules through multiple control signal lines and is used to monitor the status parameters of the backup power modules in real time and control their output start / stop.

5. The 3VA ultra-low power primary and secondary deep fusion device according to claim 4, characterized in that: The backup power module includes a supercapacitor, a lithium battery, an activation circuit, and a power relay. The supercapacitor and the lithium battery are charged through the first backup power supply and the second backup power supply, respectively. The activation circuit is connected to the lithium battery, and the switch contacts of the power relay are connected to the power input terminal of the lithium battery.

6. The 3VA ultra-low power primary and secondary deep fusion device according to claim 4, characterized in that: The voltage conversion and power control module includes a power distribution unit, a voltage conversion circuit, and a voltage regulator circuit. The power distribution unit is used to adaptively adjust the power supply of the main control module and the charging supply of the dual backup power modules. The voltage conversion circuit is used to convert the input 24V low-voltage AC power into 5V DC power output. The voltage regulator circuit is used to maintain the output accuracy of the 5V DC power at ±2%.

7. The 3VA ultra-low power primary and secondary deep fusion device according to claim 5, characterized in that: The charge / discharge management module includes a sampling circuit and a charge / discharge management IC. The sampling circuit is used to sample the charge / discharge current of the backup power module and output the sampled current signal to the charge / discharge management IC. The charge / discharge management IC is a dual-channel independent charging IC.

8. The 3VA ultra-low power primary and secondary deep fusion device according to claim 7, characterized in that: The signal control module includes a multi-channel signal control terminal, a power switching terminal, and a status feedback monitoring terminal. The activation control terminal is connected to the drive terminal of the activation circuit to trigger or terminate the activation and discharge of the lithium battery. The power switching terminal is connected to the control terminal of the power relay to realize the switching control of the backup power supply. The status feedback monitoring terminal feeds back the activation status signal to the charge and discharge management module.

9. The 3VA ultra-low power primary and secondary deep fusion device according to claim 3, characterized in that: The main control module includes a data sampling module, a CPU module, a driver module, and several functional modules. The data sampling module is used to collect voltage signals, current signals, and remote signaling signals from the feeder terminal equipment, and outputs the sampled signals to the CPU module after data processing. The CPU module and several functional modules are powered by the main power supply. The driver module is powered by the operating power supply and is used to drive the circuit breaker to operate.

10. The 3VA ultra-low power primary and secondary deep fusion device according to claim 9, characterized in that: The functional modules include, but are not limited to, a communication module, a GPS module, and an LCD display. The CPU module is connected to the communication module, the GPS module, and the LCD display via a data bus, and is used to transmit waveform data and remote control commands, clock calibration, and line data display, respectively.

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