A flexible regulation method of a DC 58.4V low-voltage direct-current power routing flexible regulation system

Abstract

This invention provides a flexible control method for a DC58.4V low-voltage DC power routing flexible control system. Specifically, after the system is powered on, the bus current and voltage are collected by a dedicated metering sampling sub-board, filtered, and processed by a metering chip before being transmitted to the main control CPU. The HPLC carrier main module couples signals through the bus and distributes them independently to each branch via a signal isolator. The HPLC slave module transmits equipment data back, achieving bidirectional communication and full-domain monitoring. The main control CPU generates instructions, which are used to achieve orderly load startup via a snap-on expansion interface. The flexible control execution module collects branch data and adjusts the conduction level of the MOSFETs via PWM to achieve flexible adjustment of photovoltaic and mains power, while simultaneously controlling the balanced charging and discharging of the battery pack and initiating auxiliary charging when energy storage and photovoltaic power are insufficient. This method achieves flexible energy management across the entire DC58.4V system, with stable and reliable communication.

Description

Technical Field

[0001] This invention relates to the field of power routing and control system technology, specifically to a DC58.4V low-voltage DC power routing flexible control system. Background Technology

[0002] The current low-voltage DC power supply system faces the following technical bottlenecks: 1. Low metering sampling accuracy: Traditional current and voltage sampling schemes are insufficient to meet the high-precision metering requirements of DC584V low-voltage, high-current scenarios; 2. Poor communication stability: Power line carrier communication is susceptible to interference in low-voltage DC environments, resulting in insufficient communication reliability; 3. Insufficient regulation flexibility: The lack of refined power regulation methods makes it difficult to achieve coordinated optimization of power generation, grid, load, and energy storage; 4. Low system integration: The dispersed design of functional modules leads to high system complexity and maintenance costs. Regarding the coordinated regulation of photovoltaic, grid, energy storage, and load, while existing technologies can achieve basic on / off control, they rely solely on general carrier networking methods without dedicated topology connection hardware structures, resulting in severe signal crosstalk when multiple devices are networked. Furthermore, flexible regulation is based solely on pure algorithm design without supporting hardware triggering and execution modules, and the algorithm implementation lacks dedicated hardware support, making it impossible to achieve flexible energy management across the entire link.

[0003] In summary, existing low-voltage DC power distribution systems suffer from problems such as poor hardware compatibility, low monitoring accuracy, single control method, large network interference, and difficulty in implementing flexible control. There is an urgent need for a flexible control system to achieve flexible adjustment and solve the above-mentioned technical defects. Summary of the Invention

[0004] To overcome the problems existing in the prior art, the present invention provides a DC power routing based on carrier communication. In view of the shortcomings of the prior art, the present invention provides a flexible control method for a DC58.4V low-voltage DC power routing flexible control system.

[0005] The technical solution adopted in this invention is: a flexible control method for a DC58.4V low-voltage DC power routing flexible control system, comprising the following steps: S1. System power-on initialization: The photovoltaic unit, mains power conversion unit, energy storage unit, auxiliary charging unit, and load unit all operate in a DC58.4V low-voltage scenario. The DC58.4V integrated metering sampling sub-board of the power routing main control board collects the real-time current of the DC58.4V bus through a 0.01 high-precision alloy sampling resistor, and collects the real-time voltage of the bus through a 100:1 voltage divider network. The collected signal is filtered twice by an RC filter circuit and a 0.1F monolithic capacitor before being transmitted to the BL0973 metering chip for processing. The metering data is then transmitted to the main control CPU through a 2-pin gold-plated header to complete the acquisition of the system's basic power parameters. S2. The HPLC carrier main module of the power routing main control board couples the carrier signal from the DC58.4V bus via a feedthrough inductor. After the control command from the main control CPU is modulated via a 4-pin flexible cable, it is sent to the carrier signal distribution module, where it is independently distributed to each branch by 4 signal isolators. Each HPLC unit obtains the power consumption data of its own metering chip from the module, transmits it through the onboard traces, demodulates it, and feeds it back to the HPLC carrier main module via the DC58.4V bus and uploads it to the main control CPU, realizing two-way real-time data interaction and full-area power consumption monitoring. Overvoltage protection circuit and metal shielding shell ensure communication and equipment safety. S3. The main control CPU generates load-ordered start-up instructions according to a preset algorithm, and transmits them to the snap-on wiring expansion interface of the load branch via carrier network. The expansion interface sends start-up signals to the next-level load devices in the order of the instructions to realize the load-ordered start-up. The S4 and DC58.4V flexible control execution modules collect data from each branch through current and voltage detection pins and upload it to the main controller. The main controller CPU compares the real-time data with the algorithm threshold and outputs a PWM signal to adjust the conduction level of the corresponding N-channel MOSFET switching unit, thereby achieving flexible adjustment of photovoltaic charging power and mains input power. The main controller CPU triggers the alternating charging and discharging of the energy storage unit's battery through the N-channel MOSFET switching unit, and the battery pack voltage balance detection pin monitors the battery voltage in real time to achieve balance control. When the photovoltaic power generation is insufficient and the battery charge is low, the main controller CPU turns on the MOSFET switch corresponding to the auxiliary charging unit, and turns it off otherwise, completing flexible energy management across the entire chain.

[0006] In step S2, the physical spacing between the four signal isolators is 10mm, enabling independent transmission of multiple branch signals without crosstalk.

[0007] In step S2, the HPLC module has a side-mounted integrated structure, which is mounted on the side edge of the corresponding unit's main control board, with an onboard trace length of 8mm from the metering chip.

[0008] In step S2, the overvoltage protection circuit of the HPLC carrier master module and the HPLC slave module is composed of a 5.1V Zener diode and a 10V current-limiting resistor connected in series, and is directly connected in series with the power supply pin of the module.

[0009] In step S4, the gate of each N-channel MOSFET switching unit is connected to the PWM output pin of the main control CPU through a 1k resistor, the drain is connected to the corresponding branch of the DC58.4V bus, and the source is connected to the corresponding functional unit.

[0010] In step S1, the 0.1F monolithic capacitor is connected in parallel across the 0.01 high-precision alloy sampling resistor, with a 5mm installation gap between them.

[0011] In step S3, the load unit's switch, socket, and fast charging device are all connected to the power routing main control board via a snap-on wiring expansion interface.

[0012] The DC58.4V low-voltage DC power routing flexible control system includes a power routing main control board and photovoltaic units, mains power conversion units, energy storage units, auxiliary charging units, and load units connected to the power routing main control board via DC58.4V bus carrier communication. The power routing main control board has a double-layer board layout and integrates an integrated metering sampling sub-board, an HPLC carrier communication main module, a carrier communication signal distribution module, and a DC58.4V flexible control execution module.

[0013] The DC58.4V integrated metering sampling sub-board includes a PCB sub-board, and integrated on the PCB sub-board are a 0.01 high-precision alloy sampling resistor, a 0.1F monolithic capacitor, an RC filter circuit, a (BL0973) metering chip, and a 100:1 voltage divider network. The 0.1F monolithic capacitor is connected in parallel across the 0.01 high-precision alloy sampling resistor, with a 5mm gap between them. The PCB sub-board is detachably connected to the power routing main control board via a 2-pin gold-plated header.

[0014] The integrated metering sampling sub-board includes a PCB sub-board, and integrated on the PCB sub-board a 0.01 high-precision alloy sampling resistor, a 0.1F monolithic capacitor, an RC filter circuit, a metering chip, and a 100:1 voltage divider network. The 0.1F monolithic capacitor is connected in parallel across the 0.01 high-precision alloy sampling resistor, with a 5mm gap between them. The PCB sub-board is detachably connected to the power routing main control board via 2-pin gold-plated headers. The upper layer of the power routing main control board is arranged with an HPLC carrier main module, and the lower layer is arranged with a main control CPU, a DC58.4V dedicated integrated metering and sampling sub-board, a carrier signal distribution module, and a flexible control execution module. The HPLC carrier main module includes a power line coupler and a modem chip. The power line coupler is connected to the positive and negative terminals of the DC58.4V bus through a feedthrough inductor. The HPLC carrier main module is connected to the main control CPU through a 4-pin flexible ribbon cable. The carrier signal distribution module includes four signal isolators. The input terminals of the four signal isolators are all connected to the HPLC carrier main module, and the output terminals are respectively connected to the photovoltaic unit, the mains power conversion unit, the energy storage unit, and the load unit. The physical distance between the four signal isolators is 10mm. The carrier signal distribution module on the load unit side is provided with two snap-fit ​​wiring expansion interfaces. The flexible control execution module includes four N-channel MOSFET switching units with a DC 60V withstand capability, current and voltage detection pins, an algorithm trigger interface, and a battery pack voltage balancing detection pin. The four N-channel MOSFET switching units correspond to the photovoltaic unit, the mains power conversion unit, the energy storage unit, and the load unit, respectively. The gate of each N-channel MOSFET switching unit is connected to the PWM output pin of the main control CPU through a 1k resistor, the drain is connected to the corresponding branch of the DC 58.4V bus, and the source is connected to the corresponding unit. The current and voltage detection pins, the algorithm trigger interface, and the battery pack voltage balancing detection pin are all connected to the onboard bus of the main control CPU. The photovoltaic unit, mains power conversion unit, energy storage unit, auxiliary charging unit, and load unit all have built-in HPLC slave modules and metering chips. The HPLC slave modules are side-mounted integrated structures, mounted on the side edge of the main control board of each unit, and directly connected to the onboard traces of the corresponding metering chips with a trace length of 8mm. The power supply terminal of the HPLC slave modules directly draws DC58.4V. Both the HPLC carrier master module and the HPLC slave module have integrated DC58.4V dedicated overvoltage protection circuits. The overvoltage protection circuit consists of a 60V bidirectional TVS diode and an 85V varistor connected in parallel and then connected in series with a fuse. Both the HPLC carrier master module and the HPLC slave module are encapsulated in a metal shielding shell.

[0015] Furthermore, the energy storage unit includes 2-3 sets of batteries, each set of batteries corresponding to a MOS transistor switching unit connected to the flexible control execution module, to realize the rotating triggering of the battery sets.

[0016] Furthermore, the load unit includes a switch, a socket, and a fast charging device, all of which are connected to the power routing main control board via a snap-fit ​​wiring expansion interface to achieve orderly start-up of the load.

[0017] Furthermore, the high-voltage end of the voltage divider network consists of four 66.5k resistors connected in series, and the low-voltage end consists of a 5m resistor, which is adapted to the sampling characteristics of a DC 58.4V low-voltage DC voltage.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uniformly configures the system to DC58.4V low-voltage DC power supply, which significantly improves power safety compared to traditional high-voltage systems. Furthermore, it designs a dedicated integrated metering and sampling sub-board for DC58.4V, modularly integrating sampling, filtering, and metering components. The 100:1 voltage divider network and compact surface mount layout are adapted to the low-voltage signal acquisition characteristics of DC58.4V, solving the problems of weak sampling signals and susceptibility to interference under low-voltage DC. The modular and detachable design enables quick disassembly and maintenance, and improves metering accuracy by 10%.

[0019] 2. The power routing main control board adopts a double-layer board layout, and the HPLC slave module adopts a side-mounted integrated structure, which greatly shortens the connection link between the carrier module and the main control and metering modules; the direct coupling structure of the feedthrough inductor reduces carrier signal loss, and the dedicated overvoltage protection circuit and metal shielding package are adapted to the DC58.4V power supply environment, which greatly improves the anti-interference capability and improves the data transmission stability by 15%.

[0020] 3. This invention constructs a star carrier network hardware topology with power routing as the core, and realizes independent transmission of multiple branch signals through 4-way signal isolators, which completely solves the signal crosstalk problem of multi-device networking; the snap-on expansion interface enables the rapid plug-and-play networking of load devices, and the two-level star topology ensures the orderly start-up of loads from the hardware level, improving networking efficiency by 20%.

[0021] 4. This invention designs a DC58.4V flexible regulation execution module, transforming the flexible regulation algorithm into hardware implementation. The MOSFET switching unit achieves flexible power regulation through PWM signals, replacing the traditional single on / off control. The battery pack rotation trigger structure and voltage equalization detection pin form a hardware closed loop, realizing intelligent switching and balanced charging and discharging of the battery pack. The end-to-end hardware structure, combined with the algorithm, realizes flexible regulation of photovoltaic, mains power, energy storage, and load, increasing the photovoltaic absorption rate by 15% and significantly improving the overall energy utilization rate of the system.

[0022] 5. All hardware components of this invention are custom-designed for DC58.4V, with strong adaptability of each module. The overall stability and precision of the system are significantly better than those of general low-voltage DC systems. Furthermore, each unit is connected via a DC58.4V bus carrier, eliminating the need for additional wiring and making installation and maintenance convenient. Attached Figure Description

[0023] Figure 1 : This is a diagram showing the overall structure of the power routing main control board; Figure 2 : Detailed image of the DC58.4V dedicated integrated metering sampling sub-board; Figure 3 : Detailed diagram of HPLC carrier module packaging / connection; Figure 4 : This is a diagram showing the topology of a star carrier network; Figure 5 : Detailed diagram of the DC58.4V flexible control execution module; Figure 6 : This is a diagram showing the configuration of the load unit; Figure 7 : This is a flowchart of the control process for a flexible control system; Figure 8 : This is a physical diagram of an embodiment of the present invention.

[0024] In the diagram: 1-Power routing main control board, 11-Main control CPU, 12-Integrated metering sampling sub-board, 121-0.01 high-precision alloy sampling resistor, 122-0.1F monolithic capacitor, 123-RC filter circuit, 124-BL0973 metering chip, 125-Voltage divider network, 126-2-pin gold-plated header, 13-HPLC carrier main module, 131-Power line coupler, 132-Mode chip, 133-Feedback inductor, 134-4-pin... Flexible cabling, 14-Carrier signal distribution module, 141-Signal isolator, 142-Snap-on wiring expansion interface, 15-DC58.4V flexible control execution module, 151-N-channel MOSFET switching unit, 152-1k resistor, 153-Current and voltage detection pin, 154-Algorithm trigger interface, 155-Battery pack voltage equalization detection pin, 16-Onboard bus, 2-DC58.4V bus, 3-Photovoltaic unit, 4-Mains power conversion unit, 5-Energy storage unit, 51-Battery, 6-Auxiliary charging unit, 7-Load unit, 71-Switch, 72-Socket, 73-Fast charging device, 8-HPLC slave module, 9-DC58.4V dedicated overvoltage protection circuit, 91-60V bidirectional TVS diode, 92-85V varistor, 10-Metal shielding shell. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0026] refer to Figure 7 This invention discloses a flexible control method for a DC58.4V low-voltage DC power routing flexible control system, the specific steps of which are as follows: Step 1: After the system is powered on, the photovoltaic unit 3, mains power conversion unit 4, energy storage unit 5, auxiliary charging unit 6, load unit 7, and all auxiliary equipment operate in a unified DC58.4V low-voltage scenario. The DC58.4V integrated metering sampling sub-board 12 of the power routing main control board 1 collects the real-time current of the DC58.4V bus 2 through a 0.01 high-precision alloy sampling resistor 121, and collects the real-time voltage of the bus through a 100:1 voltage divider network 125. The collected weak signal is filtered twice by an RC filter circuit 123 and a 0.1F monolithic capacitor 122, and then transmitted to the BL0973 metering chip 124 for calculation and processing of current, voltage, power, and power consumption. The metering data is then transmitted to the main control CPU 11 through a 2-pin gold-plated header 126 to complete the collection of the system's basic power parameters.

[0027] Step 2: The HPLC carrier master module 13 of the power routing main control board 1 couples the carrier signal from the DC58.4V bus 2 through the feedthrough inductor 133. The control command of the main control CPU 11 is modulated and sent to the carrier signal distribution module 14 through the 4-pin flexible ribbon cable 134. The signal is then independently distributed to each branch through the 4-way signal isolator 141. The HPLC slave module 8 of each unit obtains the power consumption data of the device end from its own metering chip, transmits it quickly to the HPLC slave module 8 through the onboard trace, demodulates it, and feeds it back to the HPLC carrier master module 13 through the DC58.4V bus 2. Then it is transmitted to the main control CPU 11, realizing bidirectional real-time data interaction between the power routing and all device ends, and completing the full-domain monitoring of the load power consumption. The overvoltage protection circuit 9 and the metal shielding shell 10 ensure the stability of communication and the safety of the equipment throughout the process.

[0028] Step 3: When the system needs to start multiple load devices, the main control CPU 11 generates load order start instructions according to the preset algorithm, and transmits them to the snap-on wiring expansion interface 142 of the load branch through the carrier network. The expansion interface sends the start signals to the lower-level load devices in sequence according to the instruction order, so as to realize the orderly start of the load. The independent signal transmission characteristics of the star topology ensure that the start signal is free from interference.

[0029] Step 4: The DC58.4V flexible control execution module 15 collects data from each branch in real time through the current and voltage detection pin 153. After transmitting the data to the main control CPU 11, the main control CPU 11 compares the real-time data with the preset algorithm threshold and generates a flexible control command. The PWM signal is used to adjust the conduction degree of the corresponding N-channel MOSFET switching unit 151 to achieve flexible adjustment of photovoltaic charging power and mains input power. When the battery 51 reaches the threshold, the main control CPU 11 triggers the battery pack rotation through the N-channel MOSFET switching unit 151. The battery pack voltage equalization detection pin 155 monitors the battery voltage in real time to achieve balanced charging and discharging. When the photovoltaic power generation is insufficient and the battery power is low, the main control CPU 11 triggers the MOSFET switch corresponding to the auxiliary charging unit 6 to start auxiliary charging, and vice versa, to achieve flexible energy management throughout the entire chain.

[0030] The power routing used in the flexible control system for DC 58.4V low-voltage DC power routing is referenced. Figures 1-6As shown: It includes a power routing main control board 1 and a photovoltaic unit 3, a mains power conversion unit 4, an energy storage unit 5, an auxiliary charging unit 6, and a load unit 7 that are connected to the power routing main control board 1 via a DC58.4V bus 2 carrier. The power routing main control board 1 has a double-layer board structure with an HPLC carrier area on the upper layer and a main control sampling area on the lower layer. It also integrates a DC58.4V dedicated integrated metering sampling sub-module 12, an HPLC carrier main module 13, a carrier signal distribution module 14, and a DC58.4V flexible control execution module 15.

[0031] The DC58.4V dedicated integrated metering sampling daughterboard 12 includes a PCB daughterboard, and integrated on the PCB daughterboard are a 0.01 high-precision alloy sampling resistor 121, a 0.1F monolithic capacitor 122, an RC filter circuit 123, a BL0973 metering core 124, and a 100:1 voltage divider network 125. The 0.1F monolithic capacitor 122 is connected in parallel across the 0.01 high-precision alloy sampling resistor 121, with a 5mm gap between them, forming a compact surface mount layout. The high-voltage end of the voltage divider network 125 consists of four 66.5k resistors connected in series, and the low-voltage end consists of a 5m resistor, adapted to the DC58.4V low-voltage DC voltage sampling characteristics. The PCB daughterboard is detachably connected to the main control CPU 11 of the power routing main control board 1 via a 2-pin gold-plated header 126, enabling quick disassembly and maintenance.

[0032] The upper layer of the power routing main control board 1 is arranged with an HPLC carrier main module 13, and the lower layer is arranged with a main control CPU 11, a DC58.4V dedicated integrated metering sampling sub-board 12, a carrier signal distribution module 14, and a DC58.4V flexible control execution module 15. The HPLC carrier main module 13 includes a power line coupler 131 and a modem chip 132. The power line coupler 131 is directly connected to the positive and negative terminals of the DC58.4V bus 2 through a feedthrough inductor 133 to reduce carrier signal loss. The HPLC carrier main module 13 is connected to the main control CPU 11 through a 4-pin flexible ribbon cable 134 to realize data interaction.

[0033] The carrier signal distribution module 14 includes four signal isolators 141. The input terminals of the four signal isolators 141 are all connected to the HPLC carrier main module 13, and the output terminals are respectively connected to the photovoltaic unit 3, the mains power conversion unit 4, the energy storage unit 5, and the load unit 7. The physical distance between the four signal isolators 141 is 10mm, which realizes independent transmission of multiple branch signals and avoids crosstalk. The carrier signal distribution module 14 on the load unit 7 side is provided with two snap-on wiring expansion interfaces 142, which facilitates the quick plugging and unplugging of load devices for networking.

[0034] The DC58.4V flexible regulation execution module 15 includes four N-channel MOSFET switching units 151 with a DC60V withstand capability, a current and voltage detection pin 153, an algorithm trigger interface 154, and a battery pack voltage balancing detection pin 155. The four N-channel MOSFET switching units 151 correspond to the photovoltaic unit 3, the mains power conversion unit 4, the energy storage unit 5, and the load unit 7, respectively. The gate of each N-channel MOSFET switching unit 151 is connected to the PWM output pin of the main control CPU 11 through a 1k resistor 152, the drain is connected to the corresponding branch of the DC58.4V bus 2, and the source is connected to the corresponding unit. The conduction level of the MOSFET is adjusted by the PWM signal to achieve flexible power regulation. The current and voltage detection pin 153, the algorithm trigger interface 154, and the battery pack voltage balancing detection pin 155 are all connected to the main control CPU 11 through the onboard bus 16 to realize real-time data acquisition and command transmission.

[0035] Photovoltaic unit 3, mains power conversion unit 4, energy storage unit 5, auxiliary charging unit 6, and load unit 7 all have built-in HPLC slave module 8 and metering chip; the HPLC slave module 8 has a side-mounted integrated structure, which is mounted on the side edge of the main control board of each unit and directly connected to the onboard trace of the corresponding metering chip with a trace length of 8mm, shortening the data transmission link; the power supply of the HPLC slave module 8 is directly supplied with DC58.4V, without the need for an additional step-down module, simplifying the hardware structure.

[0036] Both the HPLC carrier master module 13 and the HPLC slave module 8 integrate a dedicated DC58.4V overvoltage protection circuit 9. The overvoltage protection circuit 9 consists of a 60V bidirectional TVS diode 91 and an 85V varistor 92 connected in series, and is directly connected in series with the module power supply pin. Both the HPLC carrier master module 13 and the HPLC slave module 8 are encapsulated in a metal shielding shell 10 to improve anti-interference capability and adapt to a DC58.4V power supply environment.

[0037] The energy storage unit 5 includes two sets of batteries 51. Each set of batteries 51 corresponds to an N-channel MOS transistor switch unit 151 connected to the DC 58.4V flexible regulation execution module 15. The battery pack voltage equalization detection pin 155 is connected to the voltage sampling terminal of each set of batteries 51 to realize the rotating triggering and equal charging and discharging of the battery pack. The load unit 7 includes a switch 71, a socket 72, and a fast charging device 73, all of which are connected to the power routing main control board 1 via a snap-fit ​​wiring expansion interface 142 to realize the orderly start-up of the load.

[0038] Compared with traditional AC systems, this invention has significant advantages: high efficiency: eliminating the AC / DC conversion stage, resulting in less energy loss and a 123% improvement in overall system energy efficiency; simplified architecture: reducing grid complexity and lowering system costs; low electromagnetic interference: making it more suitable for sensitive electronic equipment; and good compatibility with new energy sources: better adapting to the power supply fluctuations of renewable energy sources such as wind and solar power.

[0039] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A flexible control method for a DC 58.4V low-voltage DC power routing flexible control system, characterized in that: Includes the following steps: S1. System power-on initialization: Photovoltaic unit (3), mains power conversion unit (4), energy storage unit (5), auxiliary charging unit (6), and load unit (7) all operate in a DC58.4V low-voltage scenario. The DC58.4V integrated metering sampling sub-board (12) of the power routing main control board (1) collects the real-time current of the DC58.4V bus (2) through a 0.01 high-precision alloy sampling resistor (121), and collects the real-time voltage of the bus through a 100:1 voltage divider network (125). The collected signal is filtered twice by an RC filter circuit (123) and a 0.1F monolithic capacitor (122) and then transmitted to the BL0973 metering chip (124) for processing. The metering data is then transmitted to the main control CPU (11) through a 2-pin gold-plated header (126) to complete the collection of basic power parameters of the system. S2. The HPLC carrier main module (13) of the power routing main control board (1) couples the carrier signal from the DC58.4V bus (2) through the feedthrough inductor (133). After the control command of the main control CPU (11) is modulated through the 4-pin flexible ribbon cable (134), it is sent to the carrier signal distribution module (14), and independently distributed to each branch by the 4-way signal isolator (141). The HPLC of each unit obtains the power consumption data of its own metering chip from the module (8), and after being transmitted through the onboard wiring, it is demodulated and fed back to the HPLC carrier main module (13) through the DC58.4V bus (2) and uploaded to the main control CPU (11) to realize bidirectional real-time data interaction and full-area power consumption monitoring. The overvoltage protection circuit (9) and the metal shielding shell (10) ensure communication and equipment safety. S3, the main control CPU (11) generates load orderly start command according to the preset algorithm, and transmits it to the snap-on wiring expansion interface (142) of the load branch through the carrier network. The expansion interface sends start signals to the lower load device in the order of the command to realize the orderly start of the load. The S4 DC58.4V flexible control execution module (15) collects data from each branch through the current and voltage detection pin (153) and uploads it to the main control CPU (11). The main control CPU (11) compares the real-time data with the algorithm threshold and outputs a PWM signal to adjust the conduction degree of the corresponding N-channel MOSFET switching unit (151) to realize flexible adjustment of photovoltaic charging power and mains input power. The main control CPU (11) triggers the battery (51) of the energy storage unit (5) to charge and discharge in turn through the N-channel MOSFET switching unit (151). The battery pack voltage balance detection pin (155) monitors the battery voltage in real time to achieve balance control. When the photovoltaic power generation is insufficient and the battery (51) power is low, the main control CPU (11) turns on the MOSFET switch corresponding to the auxiliary charging unit (6), and turns it off otherwise, thus completing the full-link flexible energy management.

2. The flexible control method of the DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: In step S2, the physical spacing between the four signal isolators (141) is 10mm, so that the signals of multiple branches can be transmitted independently without crosstalk.

3. The flexible control method of the DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: In step S2, the HPLC module (8) has a side-mounted integrated structure and is mounted on the side edge of the corresponding unit main control board, with a board trace length of 8mm between it and the metering chip.

4. The flexible control method of the DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: In step S2, the overvoltage protection circuit (9) of the HPLC carrier master module (13) and the HPLC slave module (8) is composed of a 60V bidirectional TVS tube (91) and an 85V varistor (92) connected in parallel and then connected in series with a fuse.

5. The flexible control method of the DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: In step S4, the gate of each N-channel MOS transistor switching unit (151) is connected to the PWM output pin of the main control CPU (11) through a 1k resistor (152), the drain is connected to the corresponding branch of the DC58.4V bus (2), and the source is connected to the corresponding functional unit.

6. The flexible control method of the DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: In step S1, the 0.1F monolithic capacitor (122) is connected in parallel across the 0.01 high-precision alloy sampling resistor (121), with a 5mm installation gap between them.

7. The flexible control method of the DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: In step S3, the switch (71), socket (72), and fast charging device (73) of the load unit (7) are all connected to the power routing main control board (1) via a snap-fit ​​wiring expansion interface (142).

8. The flexible control method of the DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: The DC58.4V low-voltage DC power routing flexible control system includes a power routing main control board (1) and a photovoltaic unit (3), a mains power conversion unit (4), an energy storage unit (5), an auxiliary charging unit (6), and a load unit (7) that are connected to the power routing main control board (1) via a DC58.4V bus (2) through carrier communication. The power routing main control board (1) has a double-layer board layout and integrates an integrated metering sampling sub-board (12), an HPLC carrier communication main module (13), a carrier communication signal distribution module (14), and a DC58.4V flexible control execution module (15).

9. The DC58.4V low-voltage DC power routing flexible control system according to claim 1, characterized in that: The DC58.4V integrated metering sampling sub-board (12) includes a PCB sub-board and integrated on the PCB sub-board a 0.01 high-precision alloy sampling resistor (121), a 0.1F monolithic capacitor (122), an RC filter circuit (123), a metering chip (124), and a voltage divider network (125) with a 100:1 ratio. The 0.1F monolithic capacitor (122) is connected in parallel across the two ends of the 0.01 high-precision alloy sampling resistor (121), with a distance of 5mm between them. The PCB sub-board is detachably connected to the power routing main control board (1) via a 2-pin gold-plated header (126).

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